PlayerEntityLegacyScriptEngine.m

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/*
 
PlayerEntityLegacyScriptEngine.m
 
Oolite
Copyright (C) 2004-2013 Giles C Williams and contributors
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.
 
*/
 
#import "PlayerEntityLegacyScriptEngine.h"
#import "PlayerEntityScriptMethods.h"
#import "PlayerEntitySound.h"
#import "PlayerEntityContracts.h"
#import "GuiDisplayGen.h"
#import "Universe.h"
#import "ResourceManager.h"
#import "AI.h"
#import "ShipEntityAI.h"
#import "ShipEntityScriptMethods.h"
#import "OOScript.h"
#import "OOMusicController.h"
#import "OOColor.h"
#import "OOStringParsing.h"
#import "OOStringExpander.h"
#import "OOConstToString.h"
#import "OOTexture.h"
#import "OOCollectionExtractors.h"
#import "OOLoggingExtended.h"
#import "OOSound.h"
#import "OOSunEntity.h"
#import "OOPlanetEntity.h"
#import "OOPlanetEntity.h"
#import "StationEntity.h"
#import "Comparison.h"
#import "OOLegacyScriptWhitelist.h"
#import "OOJavaScriptEngine.h"
#import "OOEquipmentType.h"
#import "HeadUpDisplay.h"
#import "OOSystemDescriptionManager.h"
#import "OOEntityFilterPredicate.h"
 
 
static NSString * const kOOLogScriptAddShipsFailed          = @"script.addShips.failed";
static NSString * const kOOLogScriptMissionDescNoText       = @"script.missionDescription.noMissionText";
static NSString * const kOOLogScriptMissionDescNoKey        = @"script.missionDescription.noMissionKey";
 
static NSString * const kOOLogDebugOnMetaClass              = @"$scriptDebugOn";
static NSString * const kOOLogDebugMessage                  = @"script.debug.message";
static NSString * const kOOLogDebugOnOff                    = @"script.debug.onOff";
static NSString * const kOOLogDebugAddPlanet                = @"script.debug.addPlanet";
static NSString * const kOOLogDebugReplaceVariablesInString = @"script.debug.replaceVariablesInString";
static NSString * const kOOLogDebugProcessSceneStringAddScene = @"script.debug.processSceneString.addScene";
static NSString * const kOOLogDebugProcessSceneStringAddModel = @"script.debug.processSceneString.addModel";
static NSString * const kOOLogDebugProcessSceneStringAddMiniPlanet = @"script.debug.processSceneString.addMiniPlanet";
 
static NSString * const kOOLogNoteRemoveAllCargo            = @"script.debug.note.removeAllCargo";
static NSString * const kOOLogNoteUseSpecialCargo           = @"script.debug.note.useSpecialCargo";
static NSString * const kOOLogNoteAddShips                  = @"script.debug.note.addShips";
static NSString * const kOOLogNoteSet                       = @"script.debug.note.set";
static NSString * const kOOLogNoteShowShipModel             = @"script.debug.note.showShipModel";
static NSString * const kOOLogNoteFuelLeak                  = @"script.debug.note.setFuelLeak";
static NSString * const kOOLogNoteAddPlanet                 = @"script.debug.note.addPlanet";
static NSString * const kOOLogNoteProcessSceneString        = @"script.debug.note.processSceneString";
 
static NSString * const kOOLogSyntaxSetPlanetInfo           = @"script.debug.syntax.setPlanetInfo";
static NSString * const kOOLogSyntaxAwardCargo              = @"script.debug.syntax.awardCargo";
static NSString * const kOOLogSyntaxAwardEquipment          = @"script.debug.syntax.awardEquipment";
static NSString * const kOOLogSyntaxRemoveEquipment         = @"script.debug.syntax.removeEquipment";
static NSString * const kOOLogSyntaxMessageShipAIs          = @"script.debug.syntax.messageShipAIs";
static NSString * const kOOLogSyntaxAddShips                = @"script.debug.syntax.addShips";
static NSString * const kOOLogSyntaxSet                     = @"script.debug.syntax.set";
static NSString * const kOOLogSyntaxReset                   = @"script.debug.syntax.reset";
static NSString * const kOOLogSyntaxIncrement               = @"script.debug.syntax.increment";
static NSString * const kOOLogSyntaxDecrement               = @"script.debug.syntax.decrement";
static NSString * const kOOLogSyntaxAdd                     = @"script.debug.syntax.add";
static NSString * const kOOLogSyntaxSubtract                = @"script.debug.syntax.subtract";
 
static NSString * const kOOLogRemoveAllCargoNotDocked       = @"script.error.removeAllCargo.notDocked";
 
 
#define ACTIONS_TEMP_PREFIX                                 "__oolite_actions_temp"
static NSString * const kActionTempPrefix                   = @ ACTIONS_TEMP_PREFIX;
 
 
static NSString     *sMissionStringValue = nil;
static NSString     *sCurrentMissionKey = nil;
static ShipEntity   *scriptTarget = nil;
 
 
@interface PlayerEntity (ScriptingPrivate)
 
- (BOOL) scriptTestCondition:(NSArray *)scriptCondition;
- (NSString *) expandScriptRightHandSide:(NSArray *)rhsComponents;
 
- (void) scriptActions:(NSArray *)actions forTarget:(ShipEntity *)target missionKey:(NSString *)missionKey;
- (NSString *) expandMessage:(NSString *)valueString;
 
@end
 
 
@implementation PlayerEntity (Scripting)
 
 
static NSString *CurrentScriptNameOr(NSString *alternative)
{
    if (sCurrentMissionKey != nil && ![sCurrentMissionKey hasPrefix:kActionTempPrefix])
    {
        return [NSString stringWithFormat:@"\"%@\"", sCurrentMissionKey];
    }
    return alternative;
}
 
 
OOINLINE NSString *CurrentScriptDesc(void)
{
    return CurrentScriptNameOr(@"<anonymous actions>");
}
 
 
static void PerformScriptActions(NSArray *actions, Entity *target);
static void PerformConditionalStatment(NSArray *actions, Entity *target);
static void PerformActionStatment(NSArray *statement, Entity *target);
static BOOL TestScriptConditions(NSArray *conditions);
 
 
static void PerformScriptActions(NSArray *actions, Entity *target)
{
    NSArray *statement = nil;
    foreach (statement, actions)
    {
        if ([[statement objectAtIndex:0] boolValue])
        {
            PerformConditionalStatment(statement, target);
        }
        else
        {
            PerformActionStatment(statement, target);
        }
    }
}
 
 
static void PerformConditionalStatment(NSArray *statement, Entity *target)
{
    /*  A sanitized conditional statement takes the form of an array:
        (true, conditions, trueActions, falseActions)
        The first element is always true. The second is an array of conditions.
        The third and four elements are actions to perform if the conditions
        evaluate to true or false, respectively.
    */
    
    NSArray             *conditions = nil;
    NSArray             *actions = nil;
    
    conditions = [statement objectAtIndex:1];
    
    if (TestScriptConditions(conditions))
    {
        actions = [statement objectAtIndex:2];
    }
    else
    {
        actions = [statement objectAtIndex:3];
    }
    
    PerformScriptActions(actions, target);
}
 
 
static void PerformActionStatment(NSArray *statement, Entity *target)
{
    /*  A sanitized action statement takes the form of an array:
        (false, selector [, argument])
        The first element is always false. The second is the method selector
        (as a string). If the method takes an argument, the third argument is
        the argument string.
 
        The sanitizer is responsible for ensuring that there is an argument,
        even if it's the empty string, for any selector with a colon at the
        end, and no arguments for selectors without colons. The runner can
        therefore use the list's element count as a flag without examining the
        selector.
    */
    
    NSString                *selectorString = nil;
    NSString                *argumentString = nil;
    NSString                *expandedString = nil;
    SEL                     selector = NULL;
    NSMutableDictionary     *locals = nil;
    PlayerEntity            *player = PLAYER;
    
    selectorString = [statement objectAtIndex:1];
    if ([statement count] > 2)  argumentString = [statement objectAtIndex:2];
    
    selector = NSSelectorFromString(selectorString);
    
    if (target == nil || ![target respondsToSelector:selector])
    {
        target = player;
    }
    
    if (argumentString != nil)
    {
        // Method with argument; substitute [description] expressions.
        locals = [player localVariablesForMission:sCurrentMissionKey];
        expandedString = OOExpandDescriptionString(OOStringExpanderDefaultRandomSeed(), argumentString, nil, locals, nil, kOOExpandNoOptions);
        
        [target performSelector:selector withObject:expandedString];
    }
    else
    {
        // Method without argument.
        [target performSelector:selector];
    }
}
 
 
static BOOL TestScriptConditions(NSArray *conditions)
{
    NSEnumerator            *condEnum = nil;
    NSArray                 *condition = nil;
    PlayerEntity            *player = PLAYER;
    
    for (condEnum = [conditions objectEnumerator]; (condition = [condEnum nextObject]); )
    {
        if (![player scriptTestCondition:condition])  return NO;
    }
    
    return YES;
}
 
 
- (void) setScriptTarget:(ShipEntity *)ship
{
    scriptTarget = ship;
}
 
 
- (ShipEntity*) scriptTarget
{
    return scriptTarget;
}
 
 
OOINLINE OOEntityStatus RecursiveRemapStatus(OOEntityStatus status)
{
    // Some player stutuses should only be seen once per "event".
    // This remaps them to something innocuous in case of recursion.
    if (status == STATUS_DOCKING ||
        status == STATUS_LAUNCHING ||
        status == STATUS_ENTERING_WITCHSPACE ||
        status == STATUS_EXITING_WITCHSPACE)
    {
        return STATUS_IN_FLIGHT;
    }
    else
    {
        return status;
    }
}
 
 
static BOOL sRunningScript = NO;
 
 
// Return the world scripts that care about -checkScript.
- (NSDictionary *) worldScriptsRequiringTickle
{
    if (worldScriptsRequiringTickle != nil)  return worldScriptsRequiringTickle;
    
    NSMutableDictionary *tickleScripts = [NSMutableDictionary dictionaryWithCapacity:[worldScripts count]];
    NSString *scriptName;
    foreachkey (scriptName, worldScripts)
    {
        OOScript *candidateScript = [worldScripts objectForKey:scriptName];
        if ([candidateScript requiresTickle])
        {
            [tickleScripts setObject:candidateScript forKey:scriptName];
        }
    }
    
    worldScriptsRequiringTickle = [tickleScripts copy];
    return worldScriptsRequiringTickle;
}
 
 
- (void) checkScript
{
    BOOL                        wasRunningScript = sRunningScript;
    OOEntityStatus              status, restoreStatus;
    
    NSDictionary *tickleScripts = [self worldScriptsRequiringTickle];
    if ([tickleScripts count] == 0)
    {
        // Quick exit if we only have JS scripts.
        return;
    }
    
    [self setScriptTarget:self];
    
    /*  World scripts can potentially be invoked recursively, through
        scriptActionOnTarget: and possibly other mechanisms. This is bad, but
        that's the way it is. Legacy world scripts rely on only seeing certain
        player statuses once per "event". To ensure this, we must lie about
        the player's status when invoked recursively.
        
        Of course, there are also methods in the game that rely on status not
        lying. However, I don't believe any that rely on these particular
        statuses can be legitimately invoked by scripts. The alternative would
        be to track the "status-as-seen-by-scripts" separately from the "real"
        status, which'd risk synchronization problems.
        
        In summary, scriptActionOnTarget: is bad, and calling it from scripts
        rather than AIs is very bad.
        -- Ahruman, 20080302
        
        Addendum: scriptActionOnTarget: is currently not in the whitelist for
        script methods. Let's hope this doesn't turn out to be a problem.
        -- Ahruman, 20090208
    */
    status = [self status];
    restoreStatus = status;
    @try
    {
        if (sRunningScript)
        {
            status = RecursiveRemapStatus(status);
            [self setStatus:status];
        }
        sRunningScript = YES;
        
        // After all that, actually running the scripts is trivial.
        [[tickleScripts allValues] makeObjectsPerformSelector:@selector(runWithTarget:) withObject:self];
    }
    @catch (NSException *exception)
    {
        OOLog(kOOLogException, @"***** Exception running world scripts: %@ : %@", [exception name], [exception reason]);
    }
    
    // Restore anti-recursion measures.
    sRunningScript = wasRunningScript;
    if (status != restoreStatus)  [self setStatus:restoreStatus];
}
 
 
- (void)runScriptActions:(NSArray *)actions withContextName:(NSString *)contextName forTarget:(ShipEntity *)target
{
    NSAutoreleasePool       *pool = nil;
    NSString                *oldMissionKey = nil;
    NSString * volatile     theMissionKey = contextName;    // Work-around for silly exception macros
    
    pool = [[NSAutoreleasePool alloc] init];
    
    // FIXME: does this actually make sense in the context of non-missions?
    oldMissionKey = sCurrentMissionKey;
    sCurrentMissionKey = theMissionKey;
    
    @try
    {
        PerformScriptActions(actions, target);
    }
    @catch (NSException *exception)
    {
        OOLog(@"script.error.exception",
              @"***** EXCEPTION %@: %@ while handling legacy script actions for %@",
              [exception name],
              [exception reason],
              [theMissionKey hasPrefix:kActionTempPrefix] ? [target shortDescription] : theMissionKey);
        // Suppress exception
    }
    
    sCurrentMissionKey = oldMissionKey;
    [pool release];
}
 
 
- (void) runUnsanitizedScriptActions:(NSArray *)actions allowingAIMethods:(BOOL)allowAIMethods withContextName:(NSString *)contextName forTarget:(ShipEntity *)target
{
    [self runScriptActions:OOSanitizeLegacyScript(actions, contextName, allowAIMethods)
           withContextName:contextName
                 forTarget:target];
}
 
 
- (BOOL) scriptTestConditions:(NSArray *)array
{
    BOOL                result = NO;
    
    @try
    {
        result = TestScriptConditions(array);
    }
    @catch (NSException *exception)
    {
        OOLog(@"script.error.exception",
              @"***** EXCEPTION %@: %@ while testing legacy script conditions.",
              [exception name],
              [exception reason]);
        // Suppress exception
    }
    
    return result;
}
 
 
- (BOOL) scriptTestCondition:(NSArray *)scriptCondition
{
    /*  Test a script condition sanitized by OOLegacyScriptWhitelist.
        
        A sanitized condition is an array of the form:
            (opType, rawString, selector, comparisonType, operandArray).
        
        opType and comparisonType are NSNumbers containing OOOperationType and
        OOComparisonType enumerators, respectively.
        
        rawString is the original textual representation of the condition for
        display purposes.
        
        selector is a string, either a method selector or a mission/local
        variable name.
        
        operandArray is an array of operands. Each operand is itself an array
        of two items: a boolean indicating whether it's a method selector
        (true) or a literal string (false), and a string.
        
        The special opType OP_FALSE doesn't require any other elements in the
        array. All other valid opTypes require the array to have five elements.
        
        For performance reasons, this method assumes the script condition will
        have been generated by OOSanitizeLegacyScriptConditions() and doesn't
        perform extensive validity checks.
    */
    
    OOOperationType             opType;
    NSString                    *selectorString = nil;
    SEL                         selector = NULL;
    OOComparisonType            comparator;
    NSArray                     *operandArray = nil;
    NSString                    *lhsString = nil;
    NSString                    *expandedRHS = nil;
    NSArray                     *rhsComponents = nil;
    NSString                    *rhsItem = nil;
    NSUInteger                  i, count;
    NSCharacterSet              *whitespace = nil;
    double                      lhsValue, rhsValue;
    BOOL                        lhsFlag, rhsFlag;
    
    opType = [scriptCondition oo_unsignedIntAtIndex:0];
    if (opType == OP_FALSE)  return NO;
    
    selectorString = [scriptCondition oo_stringAtIndex:2];
    comparator = [scriptCondition oo_unsignedIntAtIndex:3];
    operandArray = [scriptCondition oo_arrayAtIndex:4];
    
    // Transform mission/local var ops into string ops.
    if (opType == OP_MISSION_VAR)
    {
        sMissionStringValue = [mission_variables objectForKey:selectorString];
        selector = @selector(mission_string);
        opType = OP_STRING;
    }
    else if (opType == OP_LOCAL_VAR)
    {
        sMissionStringValue = [[self localVariablesForMission:sCurrentMissionKey] objectForKey:selectorString];
        selector = @selector(mission_string);
        opType = OP_STRING;
    }
    else
    {
        selector = NSSelectorFromString(selectorString);
    }
    
    expandedRHS = [self expandScriptRightHandSide:operandArray];
    
    if (opType == OP_STRING)
    {
        lhsString = [self performSelector:selector];
        
    #define DOUBLEVAL(x) ((x != nil) ? [x doubleValue] : 0.0)
        
        switch (comparator)
        {
            case COMPARISON_UNDEFINED:
                return lhsString == nil;
                
            case COMPARISON_EQUAL:
                return [lhsString isEqualToString:expandedRHS];
                
            case COMPARISON_NOTEQUAL:
                return ![lhsString isEqualToString:expandedRHS];
                
            case COMPARISON_LESSTHAN:
                return DOUBLEVAL(lhsString) < DOUBLEVAL(expandedRHS);
                
            case COMPARISON_GREATERTHAN:
                return DOUBLEVAL(lhsString) > DOUBLEVAL(expandedRHS);
                
            case COMPARISON_ONEOF:
                {
                    rhsComponents = [expandedRHS componentsSeparatedByString:@","];
                    count = [rhsComponents count];
                    
                    whitespace = [NSCharacterSet whitespaceCharacterSet];
                    lhsString = [lhsString stringByTrimmingCharactersInSet:whitespace];
                    
                    for (i = 0; i < count; i++)
                    {
                        rhsItem = [[rhsComponents objectAtIndex:i] stringByTrimmingCharactersInSet:whitespace];
                        if ([lhsString isEqualToString:rhsItem])
                        {
                            return YES;
                        }
                    }
                }
                return NO;
        }
    }
    else if (opType == OP_NUMBER)
    {
        lhsValue = [[self performSelector:selector] doubleValue];
        
        if (comparator == COMPARISON_ONEOF)
        {
            rhsComponents = [expandedRHS componentsSeparatedByString:@","];
            count = [rhsComponents count];
            
            for (i = 0; i < count; i++)
            {
                rhsItem = [rhsComponents objectAtIndex:i];
                rhsValue = [rhsItem doubleValue];
                
                if (lhsValue == rhsValue)
                {
                    return YES;
                }
            }
            
            return NO;
        }
        else
        {
            rhsValue = [expandedRHS doubleValue];
            
            switch (comparator)
            {
                case COMPARISON_EQUAL:
                    return lhsValue == rhsValue;
                    
                case COMPARISON_NOTEQUAL:
                    return lhsValue != rhsValue;
                    
                case COMPARISON_LESSTHAN:
                    return lhsValue < rhsValue;
                    
                case COMPARISON_GREATERTHAN:
                    return lhsValue > rhsValue;
                    
                case COMPARISON_UNDEFINED:
                case COMPARISON_ONEOF:
                    // "Can't happen" - undefined should have been caught by the sanitizer, oneof is handled above.
                    OOLog(@"script.error.unexpectedOperator", @"***** SCRIPT ERROR: in %@, operator %@ is not valid for numbers, evaluating to false.", CurrentScriptDesc(), OOComparisonTypeToString(comparator));
                    return NO;
            }
        }
    }
    else if (opType == OP_BOOL)
    {
        lhsFlag = [[self performSelector:selector] isEqualToString:@"YES"];
        rhsFlag = [expandedRHS isEqualToString:@"YES"];
        
        switch (comparator)
        {
            case COMPARISON_EQUAL:
                return lhsFlag == rhsFlag;
                
            case COMPARISON_NOTEQUAL:
                return lhsFlag != rhsFlag;
                
            case COMPARISON_LESSTHAN:
            case COMPARISON_GREATERTHAN:
            case COMPARISON_UNDEFINED:
            case COMPARISON_ONEOF:
                // "Can't happen" - should have been caught by the sanitizer.
                OOLog(@"script.error.unexpectedOperator", @"***** SCRIPT ERROR: in %@, operator %@ is not valid for booleans, evaluating to false.", CurrentScriptDesc(), OOComparisonTypeToString(comparator));
                return NO;
        }
    }
    
    // What are we doing here?
    OOLog(@"script.error.fallthrough", @"***** SCRIPT ERROR: in %@, unhandled condition '%@' (%@). %@", CurrentScriptDesc(), [scriptCondition objectAtIndex:1], scriptCondition, @"This is an internal error, please report it.");
    return NO;
}
 
 
- (NSString *) expandScriptRightHandSide:(NSArray *)rhsComponents
{
    NSMutableArray          *result = nil;
    NSEnumerator            *componentEnum = nil;
    NSArray                 *component = nil;
    NSString                *value = nil;
    
    result = [NSMutableArray arrayWithCapacity:[rhsComponents count]];
    
    for (componentEnum = [rhsComponents objectEnumerator]; (component = [componentEnum nextObject]); )
    {
        /*  Each component is a two-element array. The second element is a
            string. The first element is a boolean indicating whether the
            string is a selector (true) or a literal (false).
            
            All valid selectors return a string or an NSNumber; in either
            case, -description gives us a useful value to substitute into
            the expanded string.
        */
        
        value = [component oo_stringAtIndex:1];
        
        if ([[component objectAtIndex:0] boolValue])
        {
            value = [[self performSelector:NSSelectorFromString(value)] description];
            if (value == nil)  value = @"(null)";   // for backwards compatibility
        }
        
        [result addObject:value];
    }
    
    return [result componentsJoinedByString:@" "];
}
 
 
- (NSDictionary *) missionVariables
{
    return mission_variables;
}
 
 
- (NSString *)missionVariableForKey:(NSString *)key
{
    NSString *result = nil;
    if (key != nil)  result = [mission_variables objectForKey:key];
    return result;
}
 
 
- (void)setMissionVariable:(NSString *)value forKey:(NSString *)key
{
    if (key != nil)
    {
        if (value != nil)  [mission_variables setObject:value forKey:key];
        else [mission_variables removeObjectForKey:key];
    }
}
 
 
- (NSMutableDictionary *)localVariablesForMission:(NSString *)missionKey
{
    NSMutableDictionary     *result = nil;
    
    if (missionKey == nil)  return nil;
    
    result = [localVariables objectForKey:missionKey];
    if (result == nil)
    {
        result = [NSMutableDictionary dictionary];
        [localVariables setObject:result forKey:missionKey];
    }
    
    return result;
}
 
 
- (NSString *)localVariableForKey:(NSString *)variableName andMission:(NSString *)missionKey
{
    return [[localVariables oo_dictionaryForKey:missionKey] objectForKey:variableName];
}
 
 
- (void)setLocalVariable:(NSString *)value forKey:(NSString *)variableName andMission:(NSString *)missionKey
{
    NSMutableDictionary     *locals = nil;
    
    if (variableName != nil && missionKey != nil)
    {
        locals = [self localVariablesForMission:missionKey];
        if (value != nil)
        {
            [locals setObject:value forKey:variableName];
        }
        else
        {
            [locals removeObjectForKey:variableName];
        }
    }
}
 
 
- (NSArray *) missionsList
{
    NSEnumerator            *scriptEnum = nil;
    NSString                *scriptName = nil;
    NSString                *vars = nil;
    NSMutableArray          *result1 = nil;
    NSMutableArray          *result2 = nil;
    
    result1 = [NSMutableArray array];
    result2 = [NSMutableArray array];
 
    NSArray*    passengerManifest = [self passengerList];
    NSArray*    contractManifest = [self contractList];
    NSArray*    parcelManifest = [self parcelList]; 
 
    if ([passengerManifest count] > 0)
    {
        [result2 addObject:[[NSArray arrayWithObject:DESC(@"manifest-passengers")] arrayByAddingObjectsFromArray:passengerManifest]];
    }
 
    if ([parcelManifest count] > 0)
    {
        [result2 addObject:[[NSArray arrayWithObject:DESC(@"manifest-parcels")] arrayByAddingObjectsFromArray:parcelManifest]];
    }
 
    if ([contractManifest count] > 0)
    {
        [result2 addObject:[[NSArray arrayWithObject:DESC(@"manifest-contracts")] arrayByAddingObjectsFromArray:contractManifest]];
    }
 
    /* For proper display, array entries need to all be after string
     * entries, so sort them now */ 
    for (scriptEnum = [worldScripts keyEnumerator]; (scriptName = [scriptEnum nextObject]); )
    {
        vars = [mission_variables objectForKey:scriptName];
        
        if (vars != nil)
        {
            if ([vars isKindOfClass:[NSString class]])
            {
                [result1 addObject:vars];
            }
            else if ([vars isKindOfClass:[NSArray class]])
            {
                BOOL found = NO;
                NSArray *element = nil;
                foreach (element, result2)
                {
                    if ([[element oo_stringAtIndex:0] isEqualToString:[(NSArray*)vars oo_stringAtIndex:0]])
                    {
 
                        [result2 removeObject:element];
                        NSRange notTheHeader;
                        notTheHeader.location = 1;
                        notTheHeader.length = [(NSArray*)vars count]-1;
                        [result2 addObject:[element arrayByAddingObjectsFromArray:[(NSArray*)vars subarrayWithRange:notTheHeader]]];
                        found = YES;
                        break;
                    }
                }
                if (!found)
                {
                    [result2 addObject:vars];
                }
            }
        }
    }
    return [result1 arrayByAddingObjectsFromArray:result2];
}
 
 
- (NSString*) replaceVariablesInString:(NSString*) args
{
    NSMutableDictionary *locals = [self localVariablesForMission:sCurrentMissionKey];
    NSMutableString     *resultString = [NSMutableString stringWithString: args];
    NSString            *valueString;
    unsigned            i;
    NSMutableArray      *tokens = ScanTokensFromString(args);
    
    for (i = 0; i < [tokens  count]; i++)
    {
        valueString = [tokens objectAtIndex:i];
        
        if ([valueString hasPrefix:@"mission_"] && [mission_variables objectForKey:valueString])
        {
            [resultString replaceOccurrencesOfString:valueString withString:[mission_variables objectForKey:valueString] options:NSLiteralSearch range:NSMakeRange(0, [resultString length])];
        }
        else if ([locals objectForKey:valueString])
        {
            [resultString replaceOccurrencesOfString:valueString withString:[locals objectForKey:valueString] options:NSLiteralSearch range:NSMakeRange(0, [resultString length])];
        }
        else if (([valueString hasSuffix:@"_number"])||([valueString hasSuffix:@"_bool"])||([valueString hasSuffix:@"_string"]))
        {
            SEL valueselector = NSSelectorFromString(valueString);
            if ([self respondsToSelector:valueselector])
            {
                [resultString replaceOccurrencesOfString:valueString withString:[NSString stringWithFormat:@"%@", [self performSelector:valueselector]] options:NSLiteralSearch range:NSMakeRange(0, [resultString length])];
            }
        }
        else if ([valueString hasPrefix:@"["]&&[valueString hasSuffix:@"]"])
        {
            NSString* replaceString = OOExpand(valueString);
            [resultString replaceOccurrencesOfString:valueString withString:replaceString options:NSLiteralSearch range:NSMakeRange(0, [resultString length])];
        }
    }
    
    OOLog(kOOLogDebugReplaceVariablesInString, @"EXPANSION: \"%@\" becomes \"%@\"", args, resultString);
    
    return [NSString stringWithString: resultString];
}
 
/*-----------------------------------------------------*/
 
 
- (void) setMissionDescription:(NSString *)textKey
{
    [self setMissionDescription:textKey forMission:sCurrentMissionKey];
}
 
 
- (void) setMissionDescription:(NSString *)textKey forMission:(NSString *)key
{
    NSString        *text = [[UNIVERSE missiontext] oo_stringForKey:textKey];
    
    if (!text)
    {
        OOLogERR(kOOLogScriptMissionDescNoText, @"in %@, no mission text set for key '%@' [UNIVERSE missiontext] is:\n%@ ", CurrentScriptDesc(), textKey, [UNIVERSE missiontext]);
        return;
    }
    
    [self setMissionInstructions:text forMission:key];
}
 
 
// implementation of mission.setInstructions(), also final part of legacy setMissionDescription
- (void) setMissionInstructions:(NSString *)text forMission:(NSString *)key
{
    if (!key)
    {
        OOLogERR(kOOLogScriptMissionDescNoKey, @"in %@, mission key not set", CurrentScriptDesc());
        return;
    }
 
    text = OOExpand(text);
    text = [self replaceVariablesInString: text];
 
    [mission_variables setObject:text forKey:key];
}
 
 
- (void) setMissionInstructionsList:(NSArray *)list forMission:(NSString *)key
{
    if (!key)
    {
        OOLogERR(kOOLogScriptMissionDescNoKey, @"in %@, mission key not set", CurrentScriptDesc());
        return;
    }
 
    NSString *text = nil;
    NSUInteger i,ct = [list count];
    NSMutableArray *expandedList = [NSMutableArray arrayWithCapacity:ct];
    for (i=0 ; i<ct ; i++)
    {
        text = [list oo_stringAtIndex:i defaultValue:nil];
        if (text != nil)
        {
            text = OOExpand(text);
            text = [self replaceVariablesInString: text];
            [expandedList addObject:text];
        }
    }
 
    [mission_variables setObject:expandedList forKey:key];
}
 
 
- (void) clearMissionDescription
{
    [self clearMissionDescriptionForMission:sCurrentMissionKey];
}
 
 
- (void) clearMissionDescriptionForMission:(NSString *)key
{
    if (!key)
    {
        OOLogERR(kOOLogScriptMissionDescNoKey, @"in %@, mission key not set", CurrentScriptDesc());
        return;
    }
    
    if (![mission_variables objectForKey:key]) return;
    
    [mission_variables removeObjectForKey:key];
}
 
 
- (NSString *) mission_string
{
    return sMissionStringValue;
}
 
 
- (NSString *) status_string
{
    return OOStringFromEntityStatus([self status]);
}
 
 
- (NSString *) gui_screen_string
{
    return OOStringFromGUIScreenID(gui_screen);
}
 
 
- (NSNumber *) galaxy_number
{
    return [NSNumber numberWithInt:[self currentGalaxyID]];
}
 
 
- (NSNumber *) planet_number
{
    return [NSNumber numberWithInt:[self currentSystemID]];
}
 
 
- (NSNumber *) score_number
{
    return [NSNumber numberWithUnsignedInt:[self score]];
}
 
 
- (NSNumber *) credits_number
{
    return [NSNumber numberWithDouble:[self creditBalance]];
}
 
 
- (NSNumber *) scriptTimer_number
{
    return [NSNumber numberWithDouble:[self scriptTimer]];
}
 
 
static int shipsFound;
- (NSNumber *) shipsFound_number
{
    return [NSNumber numberWithInt:shipsFound];
}
 
 
- (NSNumber *) commanderLegalStatus_number
{
    return [NSNumber numberWithInt:[self legalStatus]];
}
 
 
- (void) setLegalStatus:(NSString *)valueString
{
    legalStatus = [valueString intValue];
}
 
 
- (NSString *) commanderLegalStatus_string
{
    return OODisplayStringFromLegalStatus(legalStatus);
}
 
 
- (NSNumber *) d100_number
{
    int d100 = ranrot_rand() % 100;
    return [NSNumber numberWithInt:d100];
}
 
 
- (NSNumber *) pseudoFixedD100_number
{
    return [NSNumber numberWithInt:[self systemPseudoRandom100]];
}
 
 
- (NSNumber *) d256_number
{
    int d256 = ranrot_rand() % 256;
    return [NSNumber numberWithInt:d256];
}
 
 
- (NSNumber *) pseudoFixedD256_number
{
    return [NSNumber numberWithInt:[self systemPseudoRandom256]];
}
 
 
- (NSNumber *) clock_number             // returns the game time in seconds
{
    return [NSNumber numberWithDouble:ship_clock];
}
 
 
- (NSNumber *) clock_secs_number        // returns the game time in seconds
{
    return [NSNumber numberWithUnsignedLongLong:ship_clock];
}
 
 
- (NSNumber *) clock_mins_number        // returns the game time in minutes
{
    return [NSNumber numberWithUnsignedLongLong:ship_clock / 60.0];
}
 
 
- (NSNumber *) clock_hours_number       // returns the game time in hours
{
    return [NSNumber numberWithUnsignedLongLong:ship_clock / 3600.0];
}
 
 
- (NSNumber *) clock_days_number        // returns the game time in days
{
    return [NSNumber numberWithUnsignedLongLong:ship_clock / 86400.0];
}
 
 
- (NSNumber *) fuelLevel_number         // returns the fuel level in LY
{
    return [NSNumber numberWithFloat:floor(0.1 * fuel)];
}
 
 
- (NSString *) dockedAtMainStation_bool
{
    if ([self dockedAtMainStation])  return @"YES";
    else  return @"NO";
}
 
 
- (NSString *) foundEquipment_bool
{
    return (found_equipment)? @"YES" : @"NO";
}
 
 
- (NSString *) sunWillGoNova_bool       // returns whether the sun is going to go nova
{
    return ([[UNIVERSE sun] willGoNova])? @"YES" : @"NO";
}
 
 
- (NSString *) sunGoneNova_bool     // returns whether the sun has gone nova
{
    return ([[UNIVERSE sun] goneNova])? @"YES" : @"NO";
}
 
 
- (NSString *) missionChoice_string     // returns nil or the key for the chosen option
{
    return missionChoice;
}
 
 
- (NSString *) missionKeyPress_string
{
    return missionKeyPress;
}
 
 
- (NSNumber *) dockedTechLevel_number
{
    StationEntity *dockedStation = [self dockedStation];
    if (!dockedStation) 
    {
        return [self systemTechLevel_number];
    }
    return [NSNumber numberWithUnsignedInteger:[dockedStation equivalentTechLevel]];
}
 
- (NSString *) dockedStationName_string // returns 'NONE' if the player isn't docked, [station name] if it is, 'UNKNOWN' otherwise (?)
{
    NSString            *result = nil;
    if ([self status] != STATUS_DOCKED)  return @"NONE";
    
    result = [self dockedStationName];
    if (result == nil)  result = @"UNKNOWN";
    return result;
}
 
 
- (NSString *) systemGovernment_string
{
    int government = [[self systemGovernment_number] intValue]; // 0 .. 7 (0 anarchic .. 7 most stable)
    NSString *result = OODisplayStringFromGovernmentID(government);
    if (result == nil) result = @"UNKNOWN";
    
    return result;
}
 
 
- (NSNumber *) systemGovernment_number
{
    NSDictionary *systeminfo = [UNIVERSE currentSystemData];
    return [systeminfo objectForKey:KEY_GOVERNMENT];
}
 
 
- (NSString *) systemEconomy_string
{
    int economy = [[self systemEconomy_number] intValue]; // 0 .. 7 (0 rich industrial .. 7 poor agricultural)
    NSString *result = OODisplayStringFromEconomyID(economy);
    if (result == nil) result = @"UNKNOWN";
    
    return result;
}
 
 
- (NSNumber *) systemEconomy_number
{
    NSDictionary *systeminfo = [UNIVERSE currentSystemData];
    return [systeminfo objectForKey:KEY_ECONOMY];
}
 
 
- (NSNumber *) systemTechLevel_number
{
    NSDictionary *systeminfo = [UNIVERSE currentSystemData];
    return [systeminfo objectForKey:KEY_TECHLEVEL];
}
 
 
- (NSNumber *) systemPopulation_number
{
    NSDictionary *systeminfo = [UNIVERSE currentSystemData];
    return [systeminfo objectForKey:KEY_POPULATION];
}
 
 
- (NSNumber *) systemProductivity_number
{
    NSDictionary *systeminfo = [UNIVERSE currentSystemData];
    return [systeminfo objectForKey:KEY_PRODUCTIVITY];
}
 
 
- (NSString *) commanderName_string
{
    return [self commanderName];
}
 
 
- (NSString *) commanderRank_string
{
    return OODisplayRatingStringFromKillCount([self score]);
}
 
 
- (NSString *) commanderShip_string
{
    return [self name];
}
 
 
- (NSString *) commanderShipDisplayName_string
{
    return [self displayName];
}
 
/*-----------------------------------------------------*/
 
 
- (NSString *) expandMessage:(NSString *)valueString
{
    Random_Seed very_random_seed;
    very_random_seed.a = rand() & 255;
    very_random_seed.b = rand() & 255;
    very_random_seed.c = rand() & 255;
    very_random_seed.d = rand() & 255;
    very_random_seed.e = rand() & 255;
    very_random_seed.f = rand() & 255;
    seed_RNG_only_for_planet_description(very_random_seed);
    NSString* expandedMessage = OOExpand(valueString);
    return [self replaceVariablesInString: expandedMessage];
}
 
 
- (void) commsMessage:(NSString *)valueString
{   
    [UNIVERSE addCommsMessage:[self expandMessage:valueString] forCount:4.5];
}
 
 
// Enabled on 02-May-2008 - Nikos
// This method does the same as -commsMessage, (which in fact calls), the difference being that scripts can use this
// method to have unpiloted ship entities sending comms messages.
- (void) commsMessageByUnpiloted:(NSString *)valueString
{
    [self commsMessage:valueString];
}
 
 
- (void) consoleMessage3s:(NSString *)valueString
{
    [UNIVERSE addMessage:[self expandMessage:valueString] forCount: 3];
}
 
 
- (void) consoleMessage6s:(NSString *)valueString
{
    [UNIVERSE addMessage:[self expandMessage:valueString] forCount: 6];
}
 
 
- (void) awardCredits:(NSString *)valueString
{
    if (scriptTarget != self)  return;
    
    /*  We can't use -longLongValue here for Mac OS X 10.4 compatibility, but
        we don't need to since larger values have never been supported for
        legacy scripts.
    */
    int64_t award = [valueString intValue];
    award *= 10;
    if (award < 0 && credits < (OOCreditsQuantity)-award)  credits = 0;
    else  credits += award;
}
 
 
- (void) awardShipKills:(NSString *)valueString
{
    if (scriptTarget != self)  return;
    
    int value = [valueString intValue];
    if (0 < value)  ship_kills += value;
}
 
 
- (void) awardEquipment:(NSString *)equipString  //eg. EQ_NAVAL_ENERGY_UNIT
{
    if (scriptTarget != self)  return;
    
    if ([equipString isEqualToString:@"EQ_FUEL"])
    {
        [self setFuel:[self fuelCapacity]];
    }
    
    OOEquipmentType *eqType = [OOEquipmentType equipmentTypeWithIdentifier:equipString];
    
    if ([eqType isMissileOrMine])
    {
        [self mountMissileWithRole:equipString];
    }
    else if([equipString hasPrefix:@"EQ_WEAPON"] && ![equipString hasSuffix:@"_DAMAGED"])
    {
        OOLog(kOOLogSyntaxAwardEquipment, @"***** SCRIPT ERROR: in %@, CANNOT award undamaged weapon:'%@'. Damaged weapons can be awarded instead.", CurrentScriptDesc(), equipString);
    }
    else if ([equipString hasSuffix:@"_DAMAGED"] && [self hasEquipmentItem:[equipString substringToIndex:[equipString length] - [@"_DAMAGED" length]]])
    {
        OOLog(kOOLogSyntaxAwardEquipment, @"***** SCRIPT ERROR: in %@, CANNOT award damaged equipment:'%@'. Undamaged version already equipped.", CurrentScriptDesc(), equipString);
    }
    else if ([eqType canCarryMultiple] || ![self hasEquipmentItem:equipString])
    {
        [self addEquipmentItem:equipString withValidation:YES inContext:@"scripted"];
    }
}
 
 
- (void) removeEquipment:(NSString *)equipKey  //eg. EQ_NAVAL_ENERGY_UNIT
{
    if (scriptTarget != self)  return;
 
    if ([equipKey isEqualToString:@"EQ_FUEL"])
    {
        fuel = 0;
        return;
    }
    
    if ([equipKey isEqualToString:@"EQ_CARGO_BAY"] && [self hasEquipmentItem:equipKey]
            && ([self extraCargo] > [self availableCargoSpace]))
    {
        OOLog(kOOLogSyntaxRemoveEquipment, @"***** SCRIPT ERROR: in %@, CANNOT remove cargo bay. Too much cargo.", CurrentScriptDesc());
        return;
    }
    if ([self hasEquipmentItem:equipKey] || [self hasEquipmentItem:[equipKey stringByAppendingString:@"_DAMAGED"]])
    {
        [self removeEquipmentItem:equipKey];
    }
 
}
 
 
- (void) setPlanetinfo:(NSString *)key_valueString  // uses key=value format
{
    NSArray *   tokens = [key_valueString componentsSeparatedByString:@"="];
    NSString*   keyString = nil;
    NSString*   valueString = nil;
 
    if ([tokens count] != 2)
    {
        OOLog(kOOLogSyntaxSetPlanetInfo, @"***** SCRIPT ERROR: in %@, CANNOT setPlanetinfo: '%@' (bad parameter count)", CurrentScriptDesc(), key_valueString);
        return;
    }
    
    keyString = [[tokens objectAtIndex:0] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
    valueString = [[tokens objectAtIndex:1] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
    
    /* Legacy script planetinfo settings are now non-persistent over save/load
     * Virtually nothing uses them any more, and expecting them to have a
     * manifest and identifying what it is if so seems unnecessary */
    [UNIVERSE setSystemDataKey:keyString value:valueString fromManifest:@""];
 
}
 
 
- (void) setSpecificPlanetInfo:(NSString *)key_valueString  // uses galaxy#=planet#=key=value
{
    NSArray *   tokens = [key_valueString componentsSeparatedByString:@"="];
    NSString*   keyString = nil;
    NSString*   valueString = nil;
    int gnum, pnum;
 
    if ([tokens count] != 4)
    {
        OOLog(kOOLogSyntaxSetPlanetInfo, @"***** SCRIPT ERROR: in %@, CANNOT setSpecificPlanetInfo: '%@' (bad parameter count)", CurrentScriptDesc(), key_valueString);
        return;
    }
 
    gnum = [tokens oo_intAtIndex:0];
    pnum = [tokens oo_intAtIndex:1];
    keyString = [[tokens objectAtIndex:2] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
    valueString = [[tokens objectAtIndex:3] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
 
    [UNIVERSE setSystemDataForGalaxy:gnum planet:pnum key:keyString value:valueString fromManifest:@"" forLayer:OO_LAYER_OXP_DYNAMIC];
}
 
 
- (void) awardCargo:(NSString *)amount_typeString
{
    if (scriptTarget != self)  return;
 
    NSArray                 *tokens = ScanTokensFromString(amount_typeString);
    OOCargoQuantityDelta    amount;
    OOCommodityType         type;
    OOMassUnit              unit;
 
    if ([tokens count] != 2)
    {
        OOLog(kOOLogSyntaxAwardCargo, @"***** SCRIPT ERROR: in %@, CANNOT awardCargo: '%@' (%@)", CurrentScriptDesc(), amount_typeString, @"bad parameter count");
        return;
    }
    
 
    type = [tokens oo_stringAtIndex:1];
    if (![[UNIVERSE commodities] goodDefined:type])
    {
        OOLog(kOOLogSyntaxAwardCargo, @"***** SCRIPT ERROR: in %@, CANNOT awardCargo: '%@' (%@)", CurrentScriptDesc(), amount_typeString, @"unknown type");
        return;
    }
    
    amount = [tokens oo_intAtIndex:0];
    if (amount < 0)
    {
        OOLog(kOOLogSyntaxAwardCargo, @"***** SCRIPT ERROR: in %@, CANNOT awardCargo: '%@' (%@)", CurrentScriptDesc(), amount_typeString, @"negative quantity");
        return;
    }
    
    unit = [shipCommodityData massUnitForGood:type];
    if (specialCargo && unit == UNITS_TONS)
    {
        OOLog(kOOLogSyntaxAwardCargo, @"***** SCRIPT ERROR: in %@, CANNOT awardCargo: '%@' (%@)", CurrentScriptDesc(), amount_typeString, @"cargo hold full with special cargo");
        return;
    }
    
    [self awardCommodityType:type amount:amount];
}
 
 
- (void) removeAllCargo
{
    [self removeAllCargo:NO];
}
 
- (void) removeAllCargo:(BOOL)forceRemoval
{
    // Misnamed method. It only removes cargo measured in TONS, g & Kg items are not removed. --Kaks 20091004
    OOCommodityType         type;
    
    if (scriptTarget != self)  return;
    
    if ([self status] != STATUS_DOCKED && !forceRemoval)
    {
        OOLogWARN(kOOLogRemoveAllCargoNotDocked, @"%@removeAllCargo only works when docked.", [NSString stringWithFormat:@" in %@, ", CurrentScriptDesc()]);
        return;
    }
    
    OOLog(kOOLogNoteRemoveAllCargo, @"%@ removeAllCargo", forceRemoval ? @"Forcing" : @"Going to");
    
    foreach(type, [shipCommodityData goods])
    {
        if ([shipCommodityData massUnitForGood:type] == UNITS_TONS)
        {
            [shipCommodityData setQuantity:0 forGood:type];
        }
    }
 
 
    if (forceRemoval && [self status] != STATUS_DOCKED)
    {
        NSInteger i;
        for (i = [cargo count] - 1; i >= 0; i--)
        {
            ShipEntity* canister = [cargo objectAtIndex:i];
            if (!canister)  break;
            // Since we are forcing cargo removal, we don't really care about the unit of measurement. Any
            // commodity at more than 1000kg or 1000000gr will be inside cargopods, so remove those too.
            [cargo removeObjectAtIndex:i];
        }
    }
    
    DESTROY(specialCargo);
    
    [self calculateCurrentCargo];
}
 
 
- (void) useSpecialCargo:(NSString *)descriptionString
{
    if (scriptTarget != self)  return;
 
    [self removeAllCargo:YES];  
    OOLog(kOOLogNoteUseSpecialCargo, @"Going to useSpecialCargo:'%@'", descriptionString);
    specialCargo = [OOExpand(descriptionString) retain];
}
 
 
- (void) testForEquipment:(NSString *)equipString   //eg. EQ_NAVAL_ENERGY_UNIT
{
    found_equipment = [self hasEquipmentItem:equipString];
}
 
 
- (void) awardFuel:(NSString *)valueString  // add to fuel up to 7.0 LY
{
    int delta  = 10 * [valueString floatValue];
    OOFuelQuantity scriptTargetFuelBeforeAward = [scriptTarget fuel];
 
    if (delta < 0 && scriptTargetFuelBeforeAward < (unsigned)-delta)  [scriptTarget setFuel:0];
    else
    {
        [scriptTarget setFuel:(scriptTargetFuelBeforeAward + delta)];
    }
}
 
 
- (void) messageShipAIs:(NSString *)roles_message
{
    NSMutableArray* tokens = ScanTokensFromString(roles_message);
    NSString*   roleString = nil;
    NSString*   messageString = nil;
 
    if ([tokens count] < 2)
    {
        OOLog(kOOLogSyntaxMessageShipAIs, @"***** SCRIPT ERROR: in %@, CANNOT messageShipAIs: '%@' (bad parameter count)", CurrentScriptDesc(), roles_message);
        return;
    }
 
    roleString = [tokens objectAtIndex:0];
    [tokens removeObjectAtIndex:0];
    messageString = [tokens componentsJoinedByString:@" "];
 
    NSArray *targets = [UNIVERSE findShipsMatchingPredicate:HasPrimaryRolePredicate
                                                  parameter:roleString
                                                    inRange:-1
                                                   ofEntity:nil];
 
    ShipEntity *target;
    foreach(target, targets) {
        [[target getAI] reactToMessage:messageString context:@"messageShipAIs:"];
    }
}
 
 
- (void) ejectItem:(NSString *)itemKey
{
    if (scriptTarget == nil)  scriptTarget = self;
    [scriptTarget ejectShipOfType:itemKey];
}
 
 
- (void) addShips:(NSString *)roles_number
{
    NSMutableArray* tokens = ScanTokensFromString(roles_number);
    NSString*   roleString = nil;
    NSString*   numberString = nil;
    
    if ([tokens count] != 2)
    {
        OOLog(kOOLogSyntaxAddShips, @"***** SCRIPT ERROR: in %@, CANNOT addShips: '%@' (expected <role> <count>)", CurrentScriptDesc(), roles_number);
        return;
    }
    
    roleString = [tokens objectAtIndex:0];
    numberString = [tokens objectAtIndex:1];
    
    int number = [numberString intValue];
    if (number < 0)
    {
        OOLog(kOOLogSyntaxAddShips, @"***** SCRIPT ERROR: in %@, can't add %i ships -- that's less than zero, y'know..", CurrentScriptDesc(), number);
        return;
    }
    
    OOLog(kOOLogNoteAddShips, @"DEBUG: Going to add %d ships with role '%@'", number, roleString);
    
    while (number--)
        [UNIVERSE witchspaceShipWithPrimaryRole:roleString];
}
 
 
- (void) addSystemShips:(NSString *)roles_number_position
{
    NSMutableArray* tokens = ScanTokensFromString(roles_number_position);
    NSString*   roleString = nil;
    NSString*   numberString = nil;
    NSString*   positionString = nil;
 
    if ([tokens count] != 3)
    {
        OOLog(kOOLogSyntaxAddShips, @"***** SCRIPT ERROR: in %@, CANNOT addSystemShips: '%@' (expected <role> <count> <position>)", CurrentScriptDesc(), roles_number_position);
        return;
    }
 
    roleString = [tokens objectAtIndex:0];
    numberString = [tokens objectAtIndex:1];
    positionString = [tokens objectAtIndex:2];
 
    int number = [numberString intValue];
    double posn = [positionString doubleValue];
    if (number < 0)
    {
        OOLog(kOOLogSyntaxAddShips, @"***** SCRIPT ERROR: in %@, can't add %i ships -- that's less than zero, y'know..", CurrentScriptDesc(), number);
        return;
    }
 
    OOLog(kOOLogNoteAddShips, @"DEBUG: Going to add %d ships with role '%@' at a point %.3f along route1", number, roleString, posn);
 
    while (number--)
        [UNIVERSE addShipWithRole:roleString nearRouteOneAt:posn];
}
 
 
- (void) addShipsAt:(NSString *)roles_number_system_x_y_z
{
    NSMutableArray* tokens = ScanTokensFromString(roles_number_system_x_y_z);
 
    NSString*   roleString = nil;
    NSString*   numberString = nil;
    NSString*   systemString = nil;
    NSString*   xString = nil;
    NSString*   yString = nil;
    NSString*   zString = nil;
 
    if ([tokens count] != 6)
    {
        OOLog(kOOLogSyntaxAddShips, @"***** SCRIPT ERROR: in %@, CANNOT addShipsAt: '%@' (expected <role> <count> <coordinate-system> <x> <y> <z>)", CurrentScriptDesc(), roles_number_system_x_y_z);
        return;
    }
 
    roleString = [tokens objectAtIndex:0];
    numberString = [tokens objectAtIndex:1];
    systemString = [tokens objectAtIndex:2];
    xString = [tokens objectAtIndex:3];
    yString = [tokens objectAtIndex:4];
    zString = [tokens objectAtIndex:5];
 
    HPVector posn = make_HPvector([xString doubleValue], [yString doubleValue], [zString doubleValue]);
 
    int number = [numberString intValue];
    if (number < 1)
    {
        OOLog(kOOLogSyntaxAddShips, @"----- WARNING in %@  Tried to add %i ships -- no ship added.", CurrentScriptDesc(), number);
        return;
    }
 
    OOLog(kOOLogNoteAddShips, @"DEBUG: Going to add %d ship(s) with role '%@' at point (%.3f, %.3f, %.3f) using system %@", number, roleString, posn.x, posn.y, posn.z, systemString);
 
    if (![UNIVERSE addShips: number withRole:roleString nearPosition: posn withCoordinateSystem: systemString])
    {
        OOLog(kOOLogScriptAddShipsFailed, @"***** SCRIPT ERROR: in %@, %@ could not add %u ships with role \"%@\"", CurrentScriptDesc(), @"addShipsAt:", number, roleString);
    }
}
 
 
- (void) addShipsAtPrecisely:(NSString *)roles_number_system_x_y_z
{
    NSMutableArray* tokens = ScanTokensFromString(roles_number_system_x_y_z);
 
    NSString*   roleString = nil;
    NSString*   numberString = nil;
    NSString*   systemString = nil;
    NSString*   xString = nil;
    NSString*   yString = nil;
    NSString*   zString = nil;
 
    if ([tokens count] != 6)
    {
        OOLog(kOOLogSyntaxAddShips, @"***** SCRIPT ERROR: in %@,* CANNOT addShipsAtPrecisely: '%@' (expected <role> <count> <coordinate-system> <x> <y> <z>)", CurrentScriptDesc(), roles_number_system_x_y_z);
        return;
    }
 
    roleString = [tokens objectAtIndex:0];
    numberString = [tokens objectAtIndex:1];
    systemString = [tokens objectAtIndex:2];
    xString = [tokens objectAtIndex:3];
    yString = [tokens objectAtIndex:4];
    zString = [tokens objectAtIndex:5];
 
    HPVector posn = make_HPvector([xString doubleValue], [yString doubleValue], [zString doubleValue]);
 
    int number = [numberString intValue];
    if (number < 1)
    {
        OOLog(kOOLogSyntaxAddShips, @"----- WARNING: in %@, Can't add %i ships -- no ship added.", CurrentScriptDesc(), number);
        return;
    }
 
    OOLog(kOOLogNoteAddShips, @"DEBUG: Going to add %d ship(s) with role '%@' precisely at point (%.3f, %.3f, %.3f) using system %@", number, roleString, posn.x, posn.y, posn.z, systemString);
 
    if (![UNIVERSE addShips: number withRole:roleString atPosition: posn withCoordinateSystem: systemString])
    {
        OOLog(kOOLogScriptAddShipsFailed, @"***** SCRIPT ERROR: in %@, %@ could not add %u ships with role '%@'", CurrentScriptDesc(), @"addShipsAtPrecisely:", number, roleString);
    }
}
 
 
- (void) addShipsWithinRadius:(NSString *)roles_number_system_x_y_z_r
{
    NSMutableArray* tokens = ScanTokensFromString(roles_number_system_x_y_z_r);
 
    if ([tokens count] != 7)
    {
        OOLog(kOOLogSyntaxAddShips, @"***** SCRIPT ERROR: in %@, CANNOT 'addShipsWithinRadius: %@' (expected <role> <count> <coordinate-system> <x> <y> <z> <radius>))", CurrentScriptDesc(), roles_number_system_x_y_z_r);
        return;
    }
 
    NSString* roleString = [tokens objectAtIndex:0];
    int number = [[tokens objectAtIndex:1] intValue];
    NSString* systemString = [tokens objectAtIndex:2];
    double x = [[tokens objectAtIndex:3] doubleValue];
    double y = [[tokens objectAtIndex:4] doubleValue];
    double z = [[tokens objectAtIndex:5] doubleValue];
    GLfloat r = [[tokens objectAtIndex:6] floatValue];
    HPVector posn = make_HPvector(x, y, z);
 
    if (number < 1)
    {
        OOLog(kOOLogSyntaxAddShips, @"----- WARNING: in %@, can't add %i ships -- no ship added.", CurrentScriptDesc(), number);
        return;
    }
 
    OOLog(kOOLogNoteAddShips, @"DEBUG: Going to add %d ship(s) with role '%@' within %.2f radius about point (%.3f, %.3f, %.3f) using system %@", number, roleString, r, x, y, z, systemString);
 
    if (![UNIVERSE addShips:number withRole: roleString nearPosition: posn withCoordinateSystem: systemString withinRadius: r])
    {
        OOLog(kOOLogScriptAddShipsFailed, @"***** SCRIPT ERROR :in %@, %@ could not add %u ships with role \"%@\"", CurrentScriptDesc(), @"addShipsWithinRadius:", number, roleString);
    }
}
 
 
- (void) spawnShip:(NSString *)ship_key
{
    if ([UNIVERSE spawnShip:ship_key])
    {
        OOLog(kOOLogNoteAddShips, @"DEBUG: Spawned ship with shipdata key '%@'.", ship_key);
    }
    else
    {
        OOLog(kOOLogScriptAddShipsFailed, @"***** SCRIPT ERROR: in %@, could not spawn ship with shipdata key '%@'.", CurrentScriptDesc(), ship_key);
    }
}
 
 
- (void) set:(NSString *)missionvariable_value
{
    NSMutableArray      *tokens = ScanTokensFromString(missionvariable_value);
    NSString            *missionVariableString = nil;
    NSString            *valueString = nil;
    BOOL                hasMissionPrefix, hasLocalPrefix;
 
    if ([tokens count] < 2)
    {
        OOLog(kOOLogSyntaxSet, @"***** SCRIPT ERROR: in %@, CANNOT SET '%@' (expected mission_variable or local_variable followed by value expression)", CurrentScriptDesc(), missionvariable_value);
        return;
    }
 
    missionVariableString = [tokens objectAtIndex:0];
    [tokens removeObjectAtIndex:0];
    valueString = [tokens componentsJoinedByString:@" "];
 
    hasMissionPrefix = [missionVariableString hasPrefix:@"mission_"];
    hasLocalPrefix = [missionVariableString hasPrefix:@"local_"];
 
    if (!hasMissionPrefix && !hasLocalPrefix)
    {
        OOLog(kOOLogSyntaxSet, @"***** SCRIPT ERROR: in %@, IDENTIFIER '%@' DOES NOT BEGIN WITH 'mission_' or 'local_'", CurrentScriptDesc(), missionVariableString);
        return;
    }
 
    OOLog(kOOLogNoteSet, @"DEBUG: script %@ is set to %@", missionVariableString, valueString);
    
    if (hasMissionPrefix)
    {
        [self setMissionVariable:valueString forKey:missionVariableString];
    }
    else
    {
        [self setLocalVariable:valueString forKey:missionVariableString andMission:sCurrentMissionKey];
    }
}
 
 
- (void) reset:(NSString *)missionvariable
{
    NSString*   missionVariableString = [missionvariable stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
    BOOL hasMissionPrefix, hasLocalPrefix;
 
    hasMissionPrefix = [missionVariableString hasPrefix:@"mission_"];
    hasLocalPrefix = [missionVariableString hasPrefix:@"local_"];
 
    if (hasMissionPrefix)
    {
        [self setMissionVariable:nil forKey:missionVariableString];
    }
    else if (hasLocalPrefix)
    {
        [self setLocalVariable:nil forKey:missionVariableString andMission:sCurrentMissionKey];
    }
    else
    {
        OOLog(kOOLogSyntaxReset, @"***** SCRIPT ERROR: in %@, IDENTIFIER '%@' DOES NOT BEGIN WITH 'mission_' or 'local_'", CurrentScriptDesc(), missionVariableString);
    }
}
 
 
- (void) increment:(NSString *)missionVariableString
{
    BOOL hasMissionPrefix, hasLocalPrefix;
    int value = 0;
 
    hasMissionPrefix = [missionVariableString hasPrefix:@"mission_"];
    hasLocalPrefix = [missionVariableString hasPrefix:@"local_"];
 
    if (hasMissionPrefix)
    {
        value = [[self missionVariableForKey:missionVariableString] intValue];
        value++;
        [self setMissionVariable:[NSString stringWithFormat:@"%d", value] forKey:missionVariableString];
    }
    else if (hasLocalPrefix)
    {
        value = [[self localVariableForKey:missionVariableString andMission:sCurrentMissionKey] intValue];
        value++;
        [self setLocalVariable:[NSString stringWithFormat:@"%d", value] forKey:missionVariableString andMission:sCurrentMissionKey];
    }
    else
    {
        OOLog(kOOLogSyntaxIncrement, @"***** SCRIPT ERROR: in %@, IDENTIFIER '%@' DOES NOT BEGIN WITH 'mission_' or 'local_'", CurrentScriptDesc(), missionVariableString);
    }
}
 
 
- (void) decrement:(NSString *)missionVariableString
{
    BOOL hasMissionPrefix, hasLocalPrefix;
    int value = 0;
 
    hasMissionPrefix = [missionVariableString hasPrefix:@"mission_"];
    hasLocalPrefix = [missionVariableString hasPrefix:@"local_"];
    
    if (hasMissionPrefix)
    {
        value = [[self missionVariableForKey:missionVariableString] intValue];
        value--;
        [self setMissionVariable:[NSString stringWithFormat:@"%d", value] forKey:missionVariableString];
    }
    else if (hasLocalPrefix)
    {
        value = [[self localVariableForKey:missionVariableString andMission:sCurrentMissionKey] intValue];
        value--;
        [self setLocalVariable:[NSString stringWithFormat:@"%d", value] forKey:missionVariableString andMission:sCurrentMissionKey];
    }
    else
    {
        OOLog(kOOLogSyntaxDecrement, @"***** SCRIPT ERROR: in %@, IDENTIFIER '%@' DOES NOT BEGIN WITH 'mission_' or 'local_'", CurrentScriptDesc(), missionVariableString);
    }
}
 
 
- (void) add:(NSString *)missionVariableString_value
{
    NSString*   missionVariableString = nil;
    NSString*   valueString;
    double  value;
    NSMutableArray* tokens = ScanTokensFromString(missionVariableString_value);
    BOOL hasMissionPrefix, hasLocalPrefix;
 
    if ([tokens count] < 2)
    {
        OOLog(kOOLogSyntaxAdd, @"***** SCRIPT ERROR: in %@, CANNOT ADD: '%@'", CurrentScriptDesc(), missionVariableString_value);
        return;
    }
 
    missionVariableString = [tokens objectAtIndex:0];
    [tokens removeObjectAtIndex:0];
    valueString = [tokens componentsJoinedByString:@" "];
 
    hasMissionPrefix = [missionVariableString hasPrefix:@"mission_"];
    hasLocalPrefix = [missionVariableString hasPrefix:@"local_"];
 
    if (hasMissionPrefix)
    {
        value = [[self missionVariableForKey:missionVariableString] doubleValue];
        value += [valueString doubleValue];
        [self setMissionVariable:[NSString stringWithFormat:@"%f", value] forKey:missionVariableString];
    }
    else if (hasLocalPrefix)
    {
        value = [[self localVariableForKey:missionVariableString andMission:sCurrentMissionKey] doubleValue];
        value += [valueString doubleValue];
        [self setLocalVariable:[NSString stringWithFormat:@"%f", value] forKey:missionVariableString andMission:sCurrentMissionKey];
    }
    else
    {
        OOLog(kOOLogSyntaxAdd, @"***** SCRIPT ERROR: in %@, CANNOT ADD: '%@' -- IDENTIFIER '%@' DOES NOT BEGIN WITH 'mission_' or 'local_'", CurrentScriptDesc(), missionVariableString_value, missionVariableString_value);
    }
}
 
 
- (void) subtract:(NSString *)missionVariableString_value
{
    NSString*   missionVariableString = nil;
    NSString*   valueString;
    double  value;
    NSMutableArray* tokens = ScanTokensFromString(missionVariableString_value);
    BOOL hasMissionPrefix, hasLocalPrefix;
 
    if ([tokens count] < 2)
    {
        OOLog(kOOLogSyntaxSubtract, @"***** SCRIPT ERROR: in %@, CANNOT SUBTRACT: '%@'", CurrentScriptDesc(), missionVariableString_value);
        return;
    }
 
    missionVariableString = [tokens objectAtIndex:0];
    [tokens removeObjectAtIndex:0];
    valueString = [tokens componentsJoinedByString:@" "];
 
    hasMissionPrefix = [missionVariableString hasPrefix:@"mission_"];
    hasLocalPrefix = [missionVariableString hasPrefix:@"local_"];
    
    if (hasMissionPrefix)
    {
        value = [[self missionVariableForKey:missionVariableString] doubleValue];
        value -= [valueString doubleValue];
        [self setMissionVariable:[NSString stringWithFormat:@"%f", value] forKey:missionVariableString];
    }
    else if (hasLocalPrefix)
    {
        value = [[self localVariableForKey:missionVariableString andMission:sCurrentMissionKey] doubleValue];
        value -= [valueString doubleValue];
        [self setLocalVariable:[NSString stringWithFormat:@"%f", value] forKey:missionVariableString andMission:sCurrentMissionKey];
    }
    else
    {
        OOLog(kOOLogSyntaxSubtract, @"***** SCRIPT ERROR: in %@, CANNOT SUBTRACT: '%@' -- IDENTIFIER '%@' DOES NOT BEGIN WITH 'mission_' or 'local_'", CurrentScriptDesc(), missionVariableString_value, missionVariableString_value);
    }
}
 
 
- (void) checkForShips:(NSString *)roleString
{
    shipsFound = [UNIVERSE countShipsWithPrimaryRole:roleString];
}
 
 
- (void) resetScriptTimer
{
    script_time = 0.0;
    script_time_check = SCRIPT_TIMER_INTERVAL;
    script_time_interval = SCRIPT_TIMER_INTERVAL;
}
 
 
- (void) addMissionText: (NSString *)textKey
{
    NSString            *text = nil;
    
    if ([textKey isEqualToString:lastTextKey])  return; // don't repeatedly add the same text
    [lastTextKey release];
    lastTextKey = [textKey copy];
    
    // Replace literal \n in strings with line breaks and perform expansions.
    text = [[UNIVERSE missiontext] oo_stringForKey:textKey];
    if (text == nil)  return;
    text = OOExpandWithOptions(OOStringExpanderDefaultRandomSeed(), kOOExpandBackslashN, text);
    text = [self replaceVariablesInString:text];
    
    [self addLiteralMissionText:text];
}
 
 
- (void) addLiteralMissionText:(NSString *)text
{
    if (text != nil)
    {
        GuiDisplayGen *gui = [UNIVERSE gui];
        
        NSString *para = nil;
        foreach (para, [text componentsSeparatedByString:@"\n"])
        {
            missionTextRow = [gui addLongText:para startingAtRow:missionTextRow align:GUI_ALIGN_LEFT];
        }
    }
}
 
 
- (void) setMissionChoiceByTextEntry:(BOOL)enable
{
    MyOpenGLView    *gameView = [UNIVERSE gameView];
    _missionTextEntry = enable;
    [gameView resetTypedString];
}
 
 
- (void) setMissionChoices:(NSString *)choicesKey   // choicesKey is a key for a dictionary of
{                                                   // choices/choice phrases in missiontext.plist and also..
    NSDictionary *choicesDict = [[UNIVERSE missiontext] oo_dictionaryForKey:choicesKey];
    if ([choicesDict count] == 0)
    {
        return;
    }
    [self setMissionChoicesDictionary:choicesDict];
}
 
 
- (void) setMissionChoicesDictionary:(NSDictionary *)choicesDict
{
    unsigned i;
    bool keysOK = true;
    GuiDisplayGen* gui = [UNIVERSE gui];
    // TODO: MORE STUFF HERE
    //
    // What it does now:
    // find list of choices in missiontext.plist
    // add them to gui setting the key for each line to the key in the dict of choices
    // and the text of the line to the value in the dict of choices
    // and also set the selectable range
    // ++ change the mission screen's response to wait for a choice
    // and only if the selectable range is not present ask:
    // Press Space Commander...
    //
    
    NSUInteger end_row = 21;
    if ([[self hud] allowBigGui]) 
    {
        end_row = 27;
    }
 
    NSArray *choiceKeys = [choicesDict allKeys];
    /* Guard against potential for numeric keys in dictionary, which
     * would cause an unhandled exception in the sorter. See
     * OOJavaScriptEngine::OOJSDictionaryFromJSObject for further
     * thoughts. - CIM 15/2/13 */
    for (i=0; i < [choiceKeys count]; i++)
    {
        if (![[choiceKeys objectAtIndex:i] isKindOfClass:[NSString class]])
        {
            OOLog(@"test.script.error",@"Choices list in mission screen has non-string value %@",[choiceKeys objectAtIndex:i]);
            keysOK = false;
        }
    }   
    if (keysOK)
    {
        // only try this if they're all strings
        choiceKeys = [choiceKeys sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
    }
 
    NSInteger keysCount = [choiceKeys count];
    if ((end_row + 1) < [choiceKeys count]) {
        OOLogERR(kOOLogException, @"in mission.runScreen choices: number of choices defined (%i) is greater than available lines (%i). Check HUD settings for allowBigGui.",  [choiceKeys count], (end_row + 1));
        keysCount = end_row + 1;
    }
 
    [gui setText:@"" forRow:end_row];               // clears out the 'Press spacebar' message
    [gui setKey:@"" forRow:end_row];                    // clears the key to enable pollDemoControls to check for a selection
    [gui setSelectableRange:NSMakeRange(0,0)];  // clears the selectable range
    [UNIVERSE enterGUIViewModeWithMouseInteraction:YES]; // enables mouse selection of the choices list items
    
    OOGUIRow            choicesRow = (end_row+1) - keysCount;
    NSEnumerator        *choiceEnum = nil;
    NSString            *choiceKey = nil;
    id                  choiceValue = nil;
    NSString            *choiceText = nil;
    
    BOOL selectableRowExists = NO;
    NSUInteger firstSelectableRow = end_row;
 
    for (choiceEnum = [choiceKeys objectEnumerator]; (choiceKey = [choiceEnum nextObject]); )
    {
        choiceValue = [choicesDict objectForKey:choiceKey];
        OOGUIAlignment alignment = GUI_ALIGN_CENTER;
        OOColor *rowColor = [OOColor yellowColor];
        BOOL selectable = YES;
        if ([choiceValue isKindOfClass:[NSString class]])
        {
            choiceText = [NSString stringWithFormat:@" %@ ",(NSString*)choiceValue];
        } 
        else if ([choiceValue isKindOfClass:[NSDictionary class]])
        {
            NSDictionary *choiceOpts = (NSDictionary*)choiceValue;
            choiceText = [NSString stringWithFormat:@" %@ ",[choiceOpts oo_stringForKey:@"text"]];
            NSString *alignmentChoice = [choiceOpts oo_stringForKey:@"alignment" defaultValue:@"CENTER"];
            if ([alignmentChoice isEqualToString:@"LEFT"])
            {
                alignment = GUI_ALIGN_LEFT;
            }
            else if ([alignmentChoice isEqualToString:@"RIGHT"])
            {
                alignment = GUI_ALIGN_RIGHT;
            }
            id colorDesc = [choiceOpts objectForKey:@"color"];
            if ([choiceOpts oo_boolForKey:@"unselectable"])
            {
                selectable = NO;
            }
            if (colorDesc != nil)
            {
                rowColor = [OOColor colorWithDescription:colorDesc];
            }
            else if (!selectable) // different default
            {
                rowColor = [OOColor darkGrayColor];
            }
        }
        else
        {
            continue; // invalid type
        }
        choiceText = OOExpand(choiceText);
        choiceText = [self replaceVariablesInString:choiceText];
        // allow blank rows
        if (![choiceText isEqualToString:@"  "])
        {
            [gui setText:choiceText forRow:choicesRow align: alignment];
            if (selectable)
            {
                [gui setKey:choiceKey forRow:choicesRow];
            }
            else
            {
                [gui setKey:GUI_KEY_SKIP forRow:choicesRow];
            }
            [gui setColor:rowColor forRow:choicesRow];
            if (selectable && !selectableRowExists)
            {
                selectableRowExists = YES;
                firstSelectableRow = choicesRow;
            }
        }
        else 
        {
            [gui setKey:GUI_KEY_SKIP forRow:choicesRow];
        }
        choicesRow++;
        if (choicesRow > (end_row + 1)) break;
    }
    
    if (!selectableRowExists)
    {
        // just in case choices are set but they're all blank.
        [gui setText:@"  " forRow:end_row align: GUI_ALIGN_CENTER];
        [gui setKey:@"" forRow:end_row];
        [gui setColor:[OOColor yellowColor] forRow:end_row];
    }
 
    [gui setSelectableRange:NSMakeRange((end_row+1) - keysCount, keysCount)];
    [gui setSelectedRow: firstSelectableRow];
    
    [self resetMissionChoice];
}
 
 
- (void) resetMissionChoice
{
    [self setMissionChoice:nil];
}
 
 
- (void) clearMissionScreen
{
    [self setMissionOverlayDescriptor:nil];
    [self setMissionBackgroundDescriptor:nil];
    [self setMissionBackgroundSpecial:nil];
    [self setMissionTitle:nil];
    [self setMissionMusic:nil];
    [self showShipModel:nil];
}
 
 
- (void) addMissionDestination:(NSString *)destinations
{
    unsigned j;
    int dest;
    NSMutableArray *tokens = ScanTokensFromString(destinations);
    
    for (j = 0; j < [tokens count]; j++)
    {
        dest = [tokens oo_intAtIndex:j];
        if (dest < 0 || dest > 255)
            continue;
 
        [self addMissionDestinationMarker:[self defaultMarker:dest]];
    }
}
 
 
- (void) removeMissionDestination:(NSString *)destinations
{
    unsigned            j;
    int                 dest;
    NSMutableArray      *tokens = ScanTokensFromString(destinations);
 
    for (j = 0; j < [tokens count]; j++)
    {
        dest = [[tokens objectAtIndex:j] intValue];
        if (dest < 0 || dest > 255)  continue;
 
        [self removeMissionDestinationMarker:[self defaultMarker:dest]];
    }
}
 
 
- (void) showShipModel:(NSString *)role
{
    if ([role isEqualToString:@"none"] || [role length] == 0)
    {
        [UNIVERSE removeDemoShips];
        return;
    }
    
    ShipEntity *ship = [UNIVERSE makeDemoShipWithRole:role spinning:YES];
    OOLog(kOOLogNoteShowShipModel, @"::::: showShipModel:'%@' (%@) (%@)", role, ship, [ship name]);
}
 
 
- (void) setMissionMusic:(NSString *)value
{
    if ([value length] == 0 || [[value lowercaseString] isEqualToString:@"none"])
    {
        value = nil;
    }
    [[OOMusicController sharedController] setMissionMusic:value];
}
 
 
- (NSString *) missionTitle
{
    return _missionTitle;
}
 
 
- (void) setMissionTitle:(NSString *)value
{
    if (_missionTitle != value)
    {
        [_missionTitle release];
        _missionTitle = [value copy];
    }
}
 
 
- (void) setMissionImage:(NSString *)value
{
    if ([value length] != 0 && ![[value lowercaseString] isEqualToString:@"none"])
    {
        [self setMissionOverlayDescriptor:[NSDictionary dictionaryWithObject:value forKey:@"name"]];
    }
    else
    {
        [self setMissionOverlayDescriptor:nil];
    }
 
}
 
 
- (void) setMissionBackground:(NSString *)value
{
    if ([value length] != 0 && ![[value lowercaseString] isEqualToString:@"none"])
    {
        [self setMissionBackgroundDescriptor:[NSDictionary dictionaryWithObject:value forKey:@"name"]];
    }
    else
    {
        [self setMissionBackgroundDescriptor:nil];
    }
}
 
 
- (void) setFuelLeak:(NSString *)value
{   
    if (scriptTarget != self)
    {
        [scriptTarget setFuel:0];
        return;
    }
    
    fuel_leak_rate = [value doubleValue];
    if (fuel_leak_rate > 0)
    {
        [self playFuelLeak];
        [UNIVERSE addMessage:DESC(@"danger-fuel-leak") forCount:6];
        OOLog(kOOLogNoteFuelLeak, @"%@", @"FUEL LEAK activated!");
    }
}
 
 
- (NSNumber *) fuelLeakRate_number
{
    return [NSNumber numberWithFloat:[self fuelLeakRate]];
}
 
 
- (void) setSunNovaIn:(NSString *)time_value
{
    double time_until_nova = [time_value doubleValue];
    [[UNIVERSE sun] setGoingNova:YES inTime: time_until_nova];
}
 
 
- (void) launchFromStation
{
    // ensure autosave is ready for the next unscripted launch
    if ([UNIVERSE autoSave]) [UNIVERSE setAutoSaveNow:YES];
    if ([self status] == STATUS_DOCKING)  [self setStatus:STATUS_DOCKED]; // needed here to prevent the normal update from continuing with docking.
    [self leaveDock:[self dockedStation]];
}
 
 
- (void) blowUpStation
{
    StationEntity       *mainStation = nil;
    
    mainStation = [UNIVERSE station];
    if (mainStation != nil)
    {
        [UNIVERSE unMagicMainStation];
        [mainStation takeEnergyDamage:500000000.0 from:nil becauseOf:nil weaponIdentifier:@""]; // 500 million should do it!
    }
}
 
 
- (void) sendAllShipsAway
{
    if (!UNIVERSE)
        return;
    int         ent_count =     UNIVERSE->n_entities;
    Entity**    uni_entities =  UNIVERSE->sortedEntities;   // grab the public sorted list
    Entity*     my_entities[ent_count];
    int i;
    for (i = 0; i < ent_count; i++)
        my_entities[i] = [uni_entities[i] retain];      //  retained
 
    for (i = 1; i < ent_count; i++)
    {
        Entity* e1 = my_entities[i];
        if ([e1 isShip])
        {
            ShipEntity* se1 = (ShipEntity*)e1;
            int e_class = [e1 scanClass];
            if (((e_class == CLASS_NEUTRAL)||(e_class == CLASS_POLICE)||(e_class == CLASS_MILITARY)||(e_class == CLASS_THARGOID)) &&
                                            ! ([se1 isStation] && [se1 maxFlightSpeed] == 0) &&  // exclude only stations, not carriers.
                                            [se1 hasHyperspaceMotor]) // exclude non jumping ships. Escorts will still be able to follow a mother.
            {
                AI* se1AI = [se1 getAI];
                [se1 setFuel:MAX(PLAYER_MAX_FUEL, [se1 fuelCapacity])];
                [se1 setAITo:@"exitingTraderAI.plist"]; // lets them return to their previous state after the jump
                [se1AI setState:@"EXIT_SYSTEM"];
                // The following should prevent all ships leaving at once (freezes oolite on slower machines)
                [se1AI setNextThinkTime:[UNIVERSE getTime] + 3 + (ranrot_rand() & 15)];
                [se1 setPrimaryRole:@"oolite-none"];    // prevents new ship from appearing at witchpoint when this one leaves!
            }
        }
    }
    
    for (i = 0; i < ent_count; i++)
    {
        [my_entities[i] release];       //  released
    }
}
 
 
- (OOPlanetEntity *) addPlanet: (NSString *)planetKey
{
    OOLog(kOOLogNoteAddPlanet, @"addPlanet: %@", planetKey);
 
    if (!UNIVERSE)
        return nil;
    NSDictionary* dict = [[UNIVERSE systemManager] getPropertiesForSystemKey:planetKey];
    if (!dict)
    {
        OOLog(@"script.error.addPlanet.keyNotFound", @"***** ERROR: could not find an entry in planetinfo.plist for '%@'", planetKey);
        return nil;
    }
 
    /*- add planet -*/
    OOLog(kOOLogDebugAddPlanet, @"DEBUG: initPlanetFromDictionary: %@", dict);
    OOPlanetEntity *planet = [[[OOPlanetEntity alloc] initFromDictionary:dict withAtmosphere:YES andSeed:[[UNIVERSE systemManager] getRandomSeedForCurrentSystem] forSystem:system_id] autorelease];
    
    Quaternion planetOrientation;
    if (ScanQuaternionFromString([dict objectForKey:@"orientation"], &planetOrientation))
    {
        [planet setOrientation:planetOrientation];
    }
 
    if (![dict objectForKey:@"position"])
    {
        OOLog(@"script.error.addPlanet.noPosition", @"***** ERROR: you must specify a position for scripted planet '%@' before it can be created", planetKey);
        return nil;
    }
    
    NSString *positionString = [dict objectForKey:@"position"];
    if([positionString hasPrefix:@"abs "] && ([UNIVERSE planet] != nil || [UNIVERSE sun] !=nil))
    {
        OOLogWARN(@"script.deprecated", @"setting %@ for %@ '%@' in 'abs' inside .plists can cause compatibility issues across Oolite versions. Use coordinates relative to main system objects instead.",@"position",@"planet",planetKey);
    }
    
    HPVector posn = [UNIVERSE coordinatesFromCoordinateSystemString:positionString];
    if (posn.x || posn.y || posn.z)
    {
        OOLog(kOOLogDebugAddPlanet, @"planet position (%.2f %.2f %.2f) derived from %@", posn.x, posn.y, posn.z, positionString);
    }
    else
    {
        ScanHPVectorFromString(positionString, &posn);
        OOLog(kOOLogDebugAddPlanet, @"planet position (%.2f %.2f %.2f) derived from %@", posn.x, posn.y, posn.z, positionString);
    }
    [planet setPosition: posn];
    
    [UNIVERSE addEntity:planet];
    return planet;
}
 
 
- (OOPlanetEntity *) addMoon: (NSString *)moonKey
{
    OOLog(kOOLogNoteAddPlanet, @"DEBUG: addMoon '%@'", moonKey);
 
    if (!UNIVERSE)
        return nil;
    NSDictionary* dict = [[UNIVERSE systemManager] getPropertiesForSystemKey:moonKey];
    if (!dict)
    {
        OOLog(@"script.error.addPlanet.keyNotFound", @"***** ERROR: could not find an entry in planetinfo.plist for '%@'", moonKey);
        return nil;
    }
 
    OOLog(kOOLogDebugAddPlanet, @"DEBUG: initMoonFromDictionary: %@", dict);
    OOPlanetEntity *planet = [[[OOPlanetEntity alloc] initFromDictionary:dict withAtmosphere:NO andSeed:[[UNIVERSE systemManager] getRandomSeedForCurrentSystem] forSystem:system_id] autorelease];
    
    Quaternion planetOrientation;
    if (ScanQuaternionFromString([dict objectForKey:@"orientation"], &planetOrientation))
    {
        [planet setOrientation:planetOrientation];
    }
 
    if (![dict objectForKey:@"position"])
    {
        OOLog(@"script.error.addPlanet.noPosition", @"***** ERROR: you must specify a position for scripted moon '%@' before it can be created", moonKey);
        return nil;
    }
    
    NSString *positionString = [dict objectForKey:@"position"];
    if([positionString hasPrefix:@"abs "] && ([UNIVERSE planet] != nil || [UNIVERSE sun] !=nil))
    {
        OOLogWARN(@"script.deprecated", @"setting %@ for %@ '%@' in 'abs' inside .plists can cause compatibility issues across Oolite versions. Use coordinates relative to main system objects instead.",@"position",@"moon",moonKey);
    }
    HPVector posn = [UNIVERSE coordinatesFromCoordinateSystemString:positionString];
    if (posn.x || posn.y || posn.z)
    {
        OOLog(kOOLogDebugAddPlanet, @"moon position (%.2f %.2f %.2f) derived from %@", posn.x, posn.y, posn.z, positionString);
    }
    else
    {
        ScanHPVectorFromString(positionString, &posn);
        OOLog(kOOLogDebugAddPlanet, @"moon position (%.2f %.2f %.2f) derived from %@", posn.x, posn.y, posn.z, positionString);
    }
    [planet setPosition: posn];
    
    [UNIVERSE addEntity:planet];
    return planet;
}
 
 
- (void) debugOn
{
    OOLogSetDisplayMessagesInClass(kOOLogDebugOnMetaClass, YES);
    OOLog(kOOLogDebugOnOff, @"%@", @"SCRIPT debug messages ON");
}
 
 
- (void) debugOff
{
    OOLog(kOOLogDebugOnOff, @"%@", @"SCRIPT debug messages OFF");
    OOLogSetDisplayMessagesInClass(kOOLogDebugOnMetaClass, NO);
}
 
 
- (void) debugMessage:(NSString *)args
{
    OOLog(kOOLogDebugMessage, @"SCRIPT debugMessage: %@", args);
}
 
 
- (void) playSound:(NSString *) soundName
{
    [self playLegacyScriptSound:soundName];
}
 
/*-----------------------------------------------------*/
 
 
- (void) doMissionCallback
{
    // make sure we don't call the same callback twice
    _missionWithCallback = NO;
    [[OOJavaScriptEngine sharedEngine] runMissionCallback];
}
 
 
- (void) clearMissionScreenID
{
    [_missionScreenID release];
    _missionScreenID = nil;
}
 
 
- (void) setMissionScreenID:(NSString *)msid
{
    _missionScreenID = [msid retain];
}
 
 
- (NSString *) missionScreenID
{
    return _missionScreenID;
}
 
 
- (void) endMissionScreenAndNoteOpportunity
{
    _missionAllowInterrupt = NO;
    [self clearMissionScreenID];
    // Older scripts might intercept missionScreenEnded first, and call secondary mission screens.
    if(![self doWorldEventUntilMissionScreen:OOJSID("missionScreenEnded")])
    {
        // if we're here, no mission screen is running. Opportunity! :)
        [self doWorldEventUntilMissionScreen:OOJSID("missionScreenOpportunity")];
    }
}
 
 
- (void) setGuiToMissionScreen
{
    // reset special background as legacy scripts can't use it, and this
    // is only called by legacy scripts
    [self setMissionBackgroundSpecial:nil];
    // likewise exit screen target
    [self setMissionExitScreen:GUI_SCREEN_STATUS];
 
    [self setGuiToMissionScreenWithCallback:NO];
}
 
 
- (void) refreshMissionScreenTextEntry
{
    MyOpenGLView    *gameView = [UNIVERSE gameView];
    GuiDisplayGen   *gui = [UNIVERSE gui];
    NSUInteger end_row = 21;
    if ([[self hud] allowBigGui]) 
    {
        end_row = 27;
    }
 
    [gui setText:[NSString stringWithFormat:DESC(@"mission-screen-text-prompt-@"), [gameView typedString]] forRow:end_row align:GUI_ALIGN_LEFT];
    [gui setColor:[OOColor cyanColor] forRow:end_row];
    
    [gui setShowTextCursor:YES];
    [gui setCurrentRow:end_row];
 
}
 
 
- (void) setGuiToMissionScreenWithCallback:(BOOL) callback
{
    GuiDisplayGen   *gui = [UNIVERSE gui];
    OOGUIScreenID   oldScreen = gui_screen;
    NSUInteger end_row = 21;
    if ([[self hud] allowBigGui]) 
    {
        end_row = 27;
    }
 
    // GUI stuff
    {
        [gui clear];
        [gui setTitle:[self missionTitle] ?: DESC(@"mission-information")];
        
        if (!_missionTextEntry)
        {
            [gui setText:DESC(@"press-space-commander") forRow:end_row align:GUI_ALIGN_CENTER];
            [gui setColor:[OOColor yellowColor] forRow:end_row];
            [gui setKey:@"spacebar" forRow:end_row];
            [gui setShowTextCursor:NO];
        }
        else
        {
            [self refreshMissionScreenTextEntry];
        }
        [gui setSelectableRange:NSMakeRange(0,0)];
        
        [gui setForegroundTextureDescriptor:[self missionOverlayDescriptorOrDefault]];
        NSDictionary *background_desc = [self missionBackgroundDescriptorOrDefault];
        [gui setBackgroundTextureDescriptor:background_desc];
        // must set special second as setting the descriptor resets it
        BOOL overridden = ([self missionBackgroundDescriptor] != nil);
        [gui setBackgroundTextureSpecial:[self missionBackgroundSpecial] withBackground:!overridden];
        
 
    }
    /* ends */
 
    missionTextRow = 1;
 
    
    if (gui)
        gui_screen = GUI_SCREEN_MISSION;
 
    if (lastTextKey)
    {
        [lastTextKey release];
        lastTextKey = nil;
    }
    
    [[OOMusicController sharedController] playMissionMusic];
    
    // the following are necessary...
    [UNIVERSE enterGUIViewModeWithMouseInteraction:NO];
    _missionWithCallback = callback;
    _missionAllowInterrupt = NO;
    [self noteGUIDidChangeFrom:oldScreen to:gui_screen];
 
}
 
 
- (void) setBackgroundFromDescriptionsKey:(NSString*) d_key
{
    NSArray * items = (NSArray *)[[UNIVERSE descriptions] objectForKey:d_key];
    //
    if (!items)
        return;
    //
    [self addScene: items atOffset: kZeroVector];
    //
    [self setShowDemoShips: YES];
}
 
 
- (void) addScene:(NSArray *)items atOffset:(Vector)off
{
    unsigned                i;
    
    if (items == nil)  return;
    
    for (i = 0; i < [items count]; i++)
    {
        id item = [items objectAtIndex:i];
        if ([item isKindOfClass:[NSString class]])
        {
            [self processSceneString:item atOffset: off];
        }
        else if ([item isKindOfClass:[NSArray class]])
        {
            [self addScene:item atOffset: off];
        }
        else if ([item isKindOfClass:[NSDictionary class]])
        {
            [self processSceneDictionary:item atOffset: off];
        }
    }
}
 
 
- (BOOL) processSceneDictionary:(NSDictionary *) couplet atOffset:(Vector) off
{
    NSArray *conditions = [couplet objectForKey:@"conditions"];
    NSArray *actions = nil;
    if ([couplet objectForKey:@"do"])
        actions = [NSArray arrayWithObject: [couplet objectForKey:@"do"]];
    NSArray *else_actions = nil;
    if ([couplet objectForKey:@"else"])
        else_actions = [NSArray arrayWithObject: [couplet objectForKey:@"else"]];
    BOOL success = YES;
    if (conditions == nil)
    {
        OOLog(@"script.scene.couplet.badConditions", @"***** SCENE ERROR: %@ - conditions not %@, returning %@.", [couplet description], @" found",@"YES and performing 'do' actions");
    }
    else
    {
        if (![conditions isKindOfClass:[NSArray class]])
        {
            OOLog(@"script.scene.couplet.badConditions", @"***** SCENE ERROR: %@ - conditions not %@, returning %@.", [conditions description], @"an array",@"NO");
            return NO;
        }
    }
 
    // check conditions..
    success = TestScriptConditions(OOSanitizeLegacyScriptConditions(conditions, @"<scene dictionary conditions>"));
 
    // perform successful actions...
    if ((success) && (actions) && [actions count])
        [self addScene: actions atOffset: off];
 
    // perform unsuccessful actions
    if ((!success) && (else_actions) && [else_actions count])
        [self addScene: else_actions atOffset: off];
 
    return success;
}
 
 
- (BOOL) processSceneString:(NSString*) item atOffset:(Vector) off
{
    Vector  model_p0;
    Quaternion  model_q;
    
    if (!item)
        return NO;
    NSArray * i_info = ScanTokensFromString(item);
    if (!i_info)
        return NO;
    NSString* i_key = [(NSString*)[i_info objectAtIndex:0] lowercaseString];
 
    OOLog(kOOLogNoteProcessSceneString, @"..... processing %@ (%@)", i_info, i_key);
 
    //
    // recursively add further scenes:
    //
    if ([i_key isEqualToString:@"scene"])
    {
        if ([i_info count] != 5)    // must be scene_key_x_y_z
            return NO;              //         0.... 1.. 2 3 4
        NSString* scene_key = (NSString*)[i_info objectAtIndex: 1];
        Vector  scene_offset = {0};
        ScanVectorFromString([[i_info subarrayWithRange:NSMakeRange(2, 3)] componentsJoinedByString:@" "], &scene_offset);
        scene_offset.x += off.x;    scene_offset.y += off.y;    scene_offset.z += off.z;
        NSArray * scene_items = (NSArray *)[[UNIVERSE descriptions] objectForKey:scene_key];
        OOLog(kOOLogDebugProcessSceneStringAddScene, @"::::: adding scene: '%@'", scene_key);
        //
        if (scene_items)
        {
            [self addScene: scene_items atOffset: scene_offset];
            return YES;
        }
        else
            return NO;
    }
    //
    // Add ship models:
    //
    if ([i_key isEqualToString:@"ship"]||[i_key isEqualToString:@"model"]||[i_key isEqualToString:@"role"])
    {
        if ([i_info count] != 10)   // must be item_name_x_y_z_W_X_Y_Z_align
        {
            return NO;              //         0... 1... 2 3 4 5 6 7 8 9....
        }
        
        ShipEntity* ship = nil;
        
        if ([i_key isEqualToString:@"ship"]||[i_key isEqualToString:@"model"])
        {
            ship = [UNIVERSE newShipWithName:[i_info oo_stringAtIndex: 1]];
        }
        else if ([i_key isEqualToString:@"role"])
        {
            ship = [UNIVERSE newShipWithRole:[i_info oo_stringAtIndex: 1]];
        }
        if (!ship)
            return NO;
 
        ScanVectorAndQuaternionFromString([[i_info subarrayWithRange:NSMakeRange(2, 7)] componentsJoinedByString:@" "], &model_p0, &model_q);
        
        Vector  model_offset = positionOffsetForShipInRotationToAlignment(ship, model_q, [i_info oo_stringAtIndex:9]);
        model_p0 = vector_add(model_p0, vector_subtract(off, model_offset));
 
        OOLog(kOOLogDebugProcessSceneStringAddModel, @"::::: adding model to scene:'%@'", ship);
        [ship setOrientation: model_q];
        [ship setPosition: vectorToHPVector(model_p0)];
        [UNIVERSE setMainLightPosition:(Vector){ DEMO_LIGHT_POSITION }]; // set light origin
        [ship setScanClass: CLASS_NO_DRAW];
        [ship switchAITo: @"nullAI.plist"];
        [UNIVERSE addEntity: ship]; // STATUS_IN_FLIGHT, AI state GLOBAL
        [ship setStatus: STATUS_COCKPIT_DISPLAY];
        [ship setRoll: 0.0];
        [ship setPitch: 0.0];
        [ship setVelocity: kZeroVector];
        [ship setBehaviour: BEHAVIOUR_STOP_STILL];
 
        [ship release];
        return YES;
    }
    //
    // Add player ship model:
    //
    if ([i_key isEqualToString:@"player"])
    {
        if ([i_info count] != 9)    // must be player_x_y_z_W_X_Y_Z_align
            return NO;              //         0..... 1 2 3 4 5 6 7 8....
 
        ShipEntity* doppelganger = [UNIVERSE newShipWithName:[self shipDataKey]];   // retain count = 1
        if (!doppelganger)
            return NO;
        
        ScanVectorAndQuaternionFromString([[i_info subarrayWithRange:NSMakeRange( 1, 7)] componentsJoinedByString:@" "], &model_p0, &model_q);
        
        Vector  model_offset = positionOffsetForShipInRotationToAlignment( doppelganger, model_q, (NSString*)[i_info objectAtIndex:8]);
        model_p0.x += off.x - model_offset.x;
        model_p0.y += off.y - model_offset.y;
        model_p0.z += off.z - model_offset.z;
 
        OOLog(kOOLogDebugProcessSceneStringAddModel, @"::::: adding model to scene:'%@'", doppelganger);
        [doppelganger setOrientation: model_q];
        [doppelganger setPosition: vectorToHPVector(model_p0)];
        [UNIVERSE setMainLightPosition:(Vector){ DEMO_LIGHT_POSITION }]; // set light origin
        [doppelganger setScanClass: CLASS_NO_DRAW];
        [doppelganger switchAITo: @"nullAI.plist"];
        [UNIVERSE addEntity: doppelganger];
        [doppelganger setStatus: STATUS_COCKPIT_DISPLAY];
        [doppelganger setRoll: 0.0];
        [doppelganger setPitch: 0.0];
        [doppelganger setVelocity: kZeroVector];
        [doppelganger setBehaviour: BEHAVIOUR_STOP_STILL];
 
        [doppelganger release];
        return YES;
    }
    //
    // Add  planet model: selected via gui-scene-show-planet/-local-planet
    //
    if ([i_key isEqualToString:@"local-planet"] || [i_key isEqualToString:@"target-planet"])
    {
        if ([i_info count] != 4)    // must be xxxxx-planet_x_y_z
            return NO;              //         0........... 1 2 3
        
        // sunlight position for F7 screen is chosen pseudo randomly from  4 different positions.
        if (info_system_id & 8)
        {
            _sysInfoLight = (info_system_id & 2) ? (Vector){ -10000.0, 4000.0, -10000.0 } : (Vector){ -12000.0, -5000.0, -10000.0 };
        }
        else
        {
            _sysInfoLight = (info_system_id & 2) ? (Vector){ 6000.0, -5000.0, -10000.0 } : (Vector){ 6000.0, 4000.0, -10000.0 };
        }
 
        [UNIVERSE setMainLightPosition:_sysInfoLight]; // set light origin
        
#if NEW_PLANETS
        OOPlanetEntity *originalPlanet = nil;
        if ([i_key isEqualToString:@"local-planet"])
        {
            originalPlanet = [UNIVERSE planet];
        }
        else
        {
            originalPlanet = [[[OOPlanetEntity alloc] initAsMainPlanetForSystem:info_system_id] autorelease];
        }
        OOPlanetEntity *doppelganger = [originalPlanet miniatureVersion];
        if (doppelganger == nil)  return NO;
 
#else
        OOPlanetEntity* doppelganger = nil;
        NSMutableDictionary *planetInfo = [NSMutableDictionary dictionaryWithDictionary:[UNIVERSE generateSystemData:target_system_seed]];
        
        if ([i_key isEqualToString:@"local-planet"] && [UNIVERSE sun])
        {
            OOPlanetEntity *mainPlanet = [UNIVERSE planet];
            OOTexture *texture = [mainPlanet texture];
            if (texture != nil)
            {
                [planetInfo setObject:texture forKey:@"_oo_textureObject"];
                [planetInfo oo_setBool:[mainPlanet isExplicitlyTextured] forKey:@"_oo_isExplicitlyTextured"];
                [planetInfo oo_setBool:YES forKey:@"mainForLocalSystem"];
                //[planetInfo oo_setQuaternion:[mainPlanet orientation] forKey:@"orientation"]; // the orientation is overwritten later on, without regard for the real planet's orientation.
            }
        }
        
        doppelganger = [[OOPlanetEntity alloc] initFromDictionary:planetInfo withAtmosphere:YES andSeed:target_system_seed];
        [doppelganger miniaturize];
        [doppelganger autorelease];
        
        if (doppelganger == nil)  return NO;
#endif
        
        ScanVectorFromString([[i_info subarrayWithRange:NSMakeRange(1, 3)] componentsJoinedByString:@" "], &model_p0);
        
        // miniature radii are roughly between 60 and 120. Place miniatures with a radius bigger than 60 a bit futher away.
        model_p0 = vector_multiply_scalar(model_p0, 1 - 0.5 * ((60 - [doppelganger radius]) / 60));
        
        model_p0 = vector_add(model_p0, off);
        
        // TODO: find better quaternion values.     
#if NEW_PLANETS
        //Quaternion model_q = { 0.83, 0.365148, 0.182574, 0.0 }; // shows new planets' north pole.
        //Quaternion model_q = { 0.83, -0.365148, 0.182574, 0.0 }; // shows new planets' south pole.
        Quaternion model_q = { 0.83, 0.12, 0.44, 0.0 }; // new planets - default orientation.
#else
        //model_q = make_quaternion( M_SQRT1_2, 0.314, M_SQRT1_2, 0.0 );
        Quaternion model_q = { 0.833492, 0.333396, 0.440611, 0.0 }; 
#endif
        OOLog(kOOLogDebugProcessSceneStringAddMiniPlanet, @"::::: adding %@ to scene:'%@'", i_key, doppelganger);
        [doppelganger setOrientation: model_q];
        // HPVect: mission screen coordinates are small enough that we don't need high-precision for calculations
        [doppelganger setPosition: vectorToHPVector(model_p0)];
        /* MKW - add rotation based on current time 
         *     - necessary to duplicate the rotation already performed in PlanetEntity.m since we reset the orientation above. */
        int     deltaT = floor(fmod([self clockTimeAdjusted], 86400));
        [doppelganger update: deltaT];
        [UNIVERSE addEntity:doppelganger];
        
        return YES;
    }
    
    return NO;
}
 
 
- (BOOL) addEqScriptForKey:(NSString *)eq_key
{
    if (eq_key == nil) return NO;
    
    NSString            *scriptName = [[OOEquipmentType equipmentTypeWithIdentifier:eq_key] scriptName];
    
    OOLog(@"player.equipmentScript", @"Added equipment %@, with the following script property: '%@'.", eq_key, scriptName);
 
    if (scriptName == nil) return NO;
    
    NSMutableDictionary *properties = [NSMutableDictionary dictionary];
    
    // no duplicates!
    NSArray *eqScript = nil;
    foreach (eqScript, eqScripts)
    {
        NSString *key = [eqScript oo_stringAtIndex:0];
        if ([key isEqualToString: eq_key])  return NO;
    }
    
    [properties setObject:self forKey:@"ship"];
    [properties setObject:eq_key forKey:@"equipmentKey"];
    OOScript *s = [OOScript jsScriptFromFileNamed:scriptName properties:properties];
    if (s == nil) return NO;
    
    OOLog(@"player.equipmentScript", @"Script '%@': installation %@successful.", scriptName,(s == nil ? @"un" : @""));
    
    [eqScripts addObject:[NSArray arrayWithObjects:eq_key,s,nil]];
    if (primedEquipment == [eqScripts count] - 1) primedEquipment++;    // if primed-none, keep it as primed-none.
    OOLog(@"player.equipmentScript", @"Scriptable equipment available: %lu.", [eqScripts count]);
    return YES;
}
 
 
- (void) removeEqScriptForKey:(NSString *)eq_key
{
    if (eq_key == nil) return;
    
    NSString            *key = nil;
    NSUInteger          i, count = [eqScripts count];
    
    for (i = 0; i < count; i++)
    {
        key = [[eqScripts oo_arrayAtIndex:i] oo_stringAtIndex:0];
        if ([key isEqualToString: eq_key]) 
        {
            [eqScripts removeObjectAtIndex:i];
            
            if (i == primedEquipment)  primedEquipment = count; // primed-none
            else if (i < primedEquipment)  primedEquipment--; // track the primed equipment
            if (count == primedEquipment)  primedEquipment--; // the array has shrunk by one!
 
            OOLog(@"player.equipmentScript", @"Removed equipment %@, with the following script property: '%@'.", eq_key, [[OOEquipmentType equipmentTypeWithIdentifier:eq_key] scriptName]);
        }
    }
}
 
 
- (NSUInteger) eqScriptIndexForKey:(NSString *)eq_key
{
    NSUInteger          i, count = [eqScripts count];
    
    if (eq_key != nil)
    {
        for (i = 0; i < count; i++)
        {
            NSString *key = [[eqScripts oo_arrayAtIndex:i] oo_stringAtIndex:0];
            if ([key isEqualToString: eq_key]) return i;
        }
    }
    
    return count;
}
 
 
- (void) targetNearestHostile
{
    [self scanForHostiles];
    Entity *ent = [self foundTarget];
    if (ent != nil)
    {
        ident_engaged = YES;
        missile_status = MISSILE_STATUS_TARGET_LOCKED;
        [self addTarget:ent];
    }
}
 
 
- (void) targetNearestIncomingMissile
{
    [self scanForNearestIncomingMissile];
    Entity *ent = [self foundTarget];
    if (ent != nil)
    {
        ident_engaged = YES;
        missile_status = MISSILE_STATUS_TARGET_LOCKED;
        [self addTarget:ent];
    }
}
 
 
- (void) setGalacticHyperspaceBehaviourTo:(NSString *)galacticHyperspaceBehaviourString
{
    OOGalacticHyperspaceBehaviour ghBehaviour = OOGalacticHyperspaceBehaviourFromString(galacticHyperspaceBehaviourString);
    if (ghBehaviour == GALACTIC_HYPERSPACE_BEHAVIOUR_UNKNOWN)
    {
        OOLog(@"player.setGalacticHyperspaceBehaviour.invalidInput",
              @"setGalacticHyperspaceBehaviourTo: called with unknown behaviour %@.", galacticHyperspaceBehaviourString);
    }
    [self setGalacticHyperspaceBehaviour:ghBehaviour];
}
 
 
- (void) setGalacticHyperspaceFixedCoordsTo:(NSString *)galacticHyperspaceFixedCoordsString
{   
    NSArray *coord_vals = ScanTokensFromString(galacticHyperspaceFixedCoordsString);
    if ([coord_vals count] < 2) // Will be 0 if string is nil
    {
        OOLog(@"player.setGalacticHyperspaceFixedCoords.invalidInput", @"%@",
              @"setGalacticHyperspaceFixedCoords: called with bad specifier. Defaulting to Oolite standard.");
        galacticHyperspaceFixedCoords.x = galacticHyperspaceFixedCoords.y = 0x60;
    }
    
    [self setGalacticHyperspaceFixedCoordsX:[coord_vals oo_unsignedCharAtIndex:0]
                                          y:[coord_vals oo_unsignedCharAtIndex:1]];
}
 
@end
 
 
NSString *OOComparisonTypeToString(OOComparisonType type)
{
    switch (type)
    {
        case COMPARISON_EQUAL:          return @"equal";
        case COMPARISON_NOTEQUAL:       return @"notequal";
        case COMPARISON_LESSTHAN:       return @"lessthan";
        case COMPARISON_GREATERTHAN:    return @"greaterthan";
        case COMPARISON_ONEOF:          return @"oneof";
        case COMPARISON_UNDEFINED:      return @"undefined";
    }
    return @"<error: invalid comparison type>";
}