PlayerEntityContracts.m

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/*
 
PlayerEntityContracts.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 "PlayerEntity.h"
#import "PlayerEntityLegacyScriptEngine.h"
#import "PlayerEntityContracts.h"
#import "PlayerEntityControls.h"
#import "ProxyPlayerEntity.h"
#import "HeadUpDisplay.h"
 
#import "ShipEntityAI.h"
#import "Universe.h"
#import "AI.h"
#import "OOColor.h"
#import "OOCharacter.h"
#import "StationEntity.h"
#import "GuiDisplayGen.h"
#import "OOStringExpander.h"
#import "OOStringParsing.h"
#import "OOCollectionExtractors.h"
#import "OOConstToString.h"
#import "MyOpenGLView.h"
#import "NSStringOOExtensions.h"
#import "OOShipRegistry.h"
#import "OOEquipmentType.h"
#import "OOTexture.h"
#import "OOJavaScriptEngine.h"
 
 
static unsigned RepForRisk(unsigned risk);
 
@interface PlayerEntity (ContractsPrivate)
 
- (OOCreditsQuantity) tradeInValue;
- (NSArray*) contractsListFromArray:(NSArray *) contracts_array forCargo:(BOOL) forCargo forParcels:(BOOL)forParcels;
 
@end
 
 
@implementation PlayerEntity (Contracts)
 
- (NSString *) processEscapePods // removes pods from cargo bay and treats categories of characters carried
{
    unsigned        i;
    BOOL added_entry = NO; // to prevent empty lines for slaves and the rare empty report.
    NSMutableString *result = [NSMutableString string];
    NSMutableArray  *rescuees = [NSMutableArray array];
    OOGovernmentID    government = [[[UNIVERSE currentSystemData] objectForKey:KEY_GOVERNMENT] intValue];
    if ([UNIVERSE inInterstellarSpace])  government = 1;    // equivalent to Feudal. I'm assuming any station in interstellar space is military. -- Ahruman 2008-05-29
    
    // step through the cargo removing crew from any escape pods
    // No enumerator because we're mutating the array -- Ahruman
    for (i = 0; i < [cargo count]; i++)
    {
        ShipEntity    *cargoItem = [cargo objectAtIndex:i];
        NSArray     *podCrew = [cargoItem crew];
        
        if (podCrew != nil)
        {
            // Has crew -> is escape pod.
            [rescuees addObjectsFromArray:podCrew];
            [cargoItem setCrew:nil];
            [cargo removeObjectAtIndex:i];
            i--;
        }
    }
    
    // step through the rescuees awarding insurance or bounty or adding to slaves
    for (i = 0; i < [rescuees count]; i++)
    {
        OOCharacter *rescuee = [rescuees objectAtIndex:i];
        
        if ([rescuee script])
        {
            [rescuee doScriptEvent:OOJSID("unloadCharacter")];
        }
        else if ([rescuee legacyScript])
        {
            [self runUnsanitizedScriptActions:[rescuee legacyScript]
                            allowingAIMethods:YES
                              withContextName:[NSString stringWithFormat:@"<character \"%@\" script>", [rescuee name]]
                                    forTarget:nil];
        }
        else if ([rescuee insuranceCredits] && [rescuee legalStatus])
        {
            float reward = (5.0 + government) * [rescuee legalStatus];
            float insurance = 10 * [rescuee insuranceCredits];
            if (government > (Ranrot() & 7) || reward >= insurance)
            {
                // claim bounty for capture, ignore insurance
                [result appendFormat:DESC(@"capture-reward-for-@@-@-credits-@-alt"),
                 [rescuee name], [rescuee shortDescription], OOStringFromDeciCredits(reward, YES, NO),
                 OOStringFromDeciCredits(insurance, YES, NO)];
                [self doScriptEvent:OOJSID("playerRescuedEscapePod") withArguments:[NSArray arrayWithObjects:[NSNumber numberWithUnsignedInteger:reward],@"bounty",[rescuee infoForScripting],nil]];
            }
            else
            {
                // claim insurance reward with reduction of bounty
                [result appendFormat:DESC(@"rescue-reward-for-@@-@-credits-@-alt"),
                 [rescuee name], [rescuee shortDescription], OOStringFromDeciCredits(insurance - reward, YES, NO),
                 OOStringFromDeciCredits(reward, YES, NO)];
                reward = insurance - reward;
                [self doScriptEvent:OOJSID("playerRescuedEscapePod") withArguments:[NSArray arrayWithObjects:[NSNumber numberWithUnsignedInteger:reward],@"insurance",[rescuee infoForScripting],nil]];
            }
            credits += reward;
            added_entry = YES;
        }
        else if ([rescuee insuranceCredits])
        {
            // claim insurance reward
            [result appendFormat:DESC(@"rescue-reward-for-@@-@-credits"),
                [rescuee name], [rescuee shortDescription], OOStringFromDeciCredits([rescuee insuranceCredits] * 10, YES, NO)];
            credits += 10 * [rescuee insuranceCredits];
            [self doScriptEvent:OOJSID("playerRescuedEscapePod") withArguments:[NSArray arrayWithObjects:[NSNumber numberWithUnsignedInteger:(10 * [rescuee insuranceCredits])],@"insurance",[rescuee infoForScripting],nil]];
                
            added_entry = YES;
        }
        else if ([rescuee legalStatus])
        {
            // claim bounty for capture
            float reward = (5.0 + government) * [rescuee legalStatus];
            [result appendFormat:DESC(@"capture-reward-for-@@-@-credits"),
                [rescuee name], [rescuee shortDescription], OOStringFromDeciCredits(reward, YES, NO)];
            credits += reward;
            [self doScriptEvent:OOJSID("playerRescuedEscapePod") withArguments:[NSArray arrayWithObjects:[NSNumber numberWithUnsignedInteger:reward],@"bounty",[rescuee infoForScripting],nil]];
            added_entry = YES;
        }
        else
        {
            // sell as slave - increase no. of slaves in manifest
            [shipCommodityData addQuantity:1 forGood:@"slaves"];
            [self doScriptEvent:OOJSID("playerRescuedEscapePod") withArguments:[NSArray arrayWithObjects:[NSNumber numberWithUnsignedInteger:0],@"slave",[rescuee infoForScripting],nil]];
 
        }
        if ((i < [rescuees count] - 1) && added_entry)
            [result appendString:@"\n"];
        added_entry = NO;
    }
    
    [self calculateCurrentCargo];
    
    return result;
}
- (NSString *) processEscapePods // removes pods from cargo bay and treats categories of characters carried {…}
 
 
- (NSString *) checkPassengerContracts   // returns messages from any passengers whose status have changed
{
    if ([self dockedStation] != [UNIVERSE station]) // only drop off passengers or fulfil contracts at main station
        return nil;
    
    // check escape pods...
    // TODO
    
    NSMutableString     *result = [NSMutableString string];
    unsigned            i;
    
    // check passenger contracts
    for (i = 0; i < [passengers count]; i++)
    {
        NSDictionary* passenger_info = [[passengers oo_dictionaryAtIndex:i] retain];
        NSString* passenger_name = [passenger_info oo_stringForKey:PASSENGER_KEY_NAME];
        int dest = [passenger_info oo_intForKey:CONTRACT_KEY_DESTINATION];
        // the system name can change via script
        NSString* passenger_dest_name = [UNIVERSE getSystemName: dest];
        int dest_eta = [passenger_info oo_doubleForKey:CONTRACT_KEY_ARRIVAL_TIME] - ship_clock;
        
        if (system_id == dest)
        {
            // we've arrived in system!
            if (dest_eta > 0)
            {
                // and in good time
                long long fee = [passenger_info oo_longLongForKey:CONTRACT_KEY_FEE];
                while ((randf() < 0.75)&&(dest_eta > 3600))    // delivered with more than an hour to spare and a decent customer?
                {
                    fee *= 110; // tip + 10%
                    fee /= 100;
                    dest_eta *= 0.5;
                }
                credits += 10 * fee;
                
                [result appendFormatLine:DESC(@"passenger-delivered-okay-@-@-@"), passenger_name, OOIntCredits(fee), passenger_dest_name];
                if ([passenger_info oo_unsignedIntForKey:CONTRACT_KEY_RISK defaultValue:0] > 0)
                {
                    [self addRoleToPlayer:@"trader-courier+"];
                }
 
                [self increasePassengerReputation:RepForRisk([passenger_info oo_unsignedIntForKey:CONTRACT_KEY_RISK defaultValue:0])];
                [passengers removeObjectAtIndex:i--];
                [self doScriptEvent:OOJSID("playerCompletedContract") withArguments:[NSArray arrayWithObjects:@"passenger",@"success",[NSNumber numberWithUnsignedInteger:(10*fee)],passenger_info,nil]];
            }
            else
            {
                // but we're late!
                long long fee = [passenger_info oo_longLongForKey:CONTRACT_KEY_FEE] / 2;  // halve fare
                while (randf() < 0.5)  // maybe halve fare a few times!
                    fee /= 2;
                credits += 10 * fee;
                
                [result appendFormatLine:DESC(@"passenger-delivered-late-@-@-@"), passenger_name, OOIntCredits(fee), passenger_dest_name];
                if ([passenger_info oo_unsignedIntForKey:CONTRACT_KEY_RISK defaultValue:0] > 0)
                {
                    [self addRoleToPlayer:@"trader-courier+"];
                }
 
                [passengers removeObjectAtIndex:i--];
                [self doScriptEvent:OOJSID("playerCompletedContract") withArguments:[NSArray arrayWithObjects:@"passenger",@"late",[NSNumber numberWithUnsignedInteger:10*fee],passenger_info,nil]];
 
            }
        }
        else
        {
            if (dest_eta < 0)
            {
                // we've run out of time!
                [result appendFormatLine:DESC(@"passenger-failed-@"), passenger_name];
                
                [self decreasePassengerReputation:RepForRisk([passenger_info oo_unsignedIntForKey:CONTRACT_KEY_RISK defaultValue:0])];
                [passengers removeObjectAtIndex:i--];
                [self doScriptEvent:OOJSID("playerCompletedContract") withArguments:[NSArray arrayWithObjects:@"passenger",@"failed",[NSNumber numberWithUnsignedInteger:0],passenger_info,nil]];
            }
        }
        [passenger_info release];
    }
 
    // check parcel contracts
    for (i = 0; i < [parcels count]; i++)
    {
        NSDictionary* parcel_info = [[parcels oo_dictionaryAtIndex:i] retain];
        NSString* parcel_name = [parcel_info oo_stringForKey:PASSENGER_KEY_NAME];
        int dest = [parcel_info oo_intForKey:CONTRACT_KEY_DESTINATION];
        int dest_eta = [parcel_info oo_doubleForKey:CONTRACT_KEY_ARRIVAL_TIME] - ship_clock;
        
        if (system_id == dest)
        {
            // we've arrived in system!
            if (dest_eta > 0)
            {
                // and in good time
                long long fee = [parcel_info oo_longLongForKey:CONTRACT_KEY_FEE];
                while ((randf() < 0.75)&&(dest_eta > 86400))   // delivered with more than a day to spare and a decent customer?
                {
                    // lower tips than passengers
                    fee *= 110; // tip + 10%
                    fee /= 100;
                    dest_eta *= 0.5;
                }
                credits += 10 * fee;
                
                [result appendFormatLine:DESC(@"parcel-delivered-okay-@-@"), parcel_name, OOIntCredits(fee)];
                
                [self increaseParcelReputation:RepForRisk([parcel_info oo_unsignedIntForKey:CONTRACT_KEY_RISK defaultValue:0])];
 
                [parcels removeObjectAtIndex:i--];
                if ([parcel_info oo_unsignedIntForKey:CONTRACT_KEY_RISK defaultValue:0] > 0)
                {
                    [self addRoleToPlayer:@"trader-courier+"];
                }
                [self doScriptEvent:OOJSID("playerCompletedContract") withArguments:[NSArray arrayWithObjects:@"parcel",@"success",[NSNumber numberWithUnsignedInteger:10*fee],parcel_info,nil]];
 
            }
            else
            {
                // but we're late!
                long long fee = [parcel_info oo_longLongForKey:CONTRACT_KEY_FEE] / 2;    // halve fare
                while (randf() < 0.5)  // maybe halve fare a few times!
                    fee /= 2;
                credits += 10 * fee;
                
                [result appendFormatLine:DESC(@"parcel-delivered-late-@-@"), parcel_name, OOIntCredits(fee)];
                if ([parcel_info oo_unsignedIntForKey:CONTRACT_KEY_RISK defaultValue:0] > 0)
                {
                    [self addRoleToPlayer:@"trader-courier+"];
                }
                [parcels removeObjectAtIndex:i--];
                [self doScriptEvent:OOJSID("playerCompletedContract") withArguments:[NSArray arrayWithObjects:@"parcel",@"late",[NSNumber numberWithUnsignedInteger:10*fee],parcel_info,nil]];
            }
        }
        else
        {
            if (dest_eta < 0)
            {
                // we've run out of time!
                [result appendFormatLine:DESC(@"parcel-failed-@"), parcel_name];
                
                [self decreaseParcelReputation:RepForRisk([parcel_info oo_unsignedIntForKey:CONTRACT_KEY_RISK defaultValue:0])];
                [parcels removeObjectAtIndex:i--];
                [self doScriptEvent:OOJSID("playerCompletedContract") withArguments:[NSArray arrayWithObjects:@"parcel",@"failed",[NSNumber numberWithUnsignedInteger:0],parcel_info,nil]];
            }
        }
        [parcel_info release];
    }
 
    
    // check cargo contracts
    for (i = 0; i < [contracts count]; i++)
    {
        NSDictionary* contract_info = [[contracts oo_dictionaryAtIndex:i] retain];
        NSString* contract_cargo_desc = [contract_info oo_stringForKey:CARGO_KEY_DESCRIPTION];
        int dest = [contract_info oo_intForKey:CONTRACT_KEY_DESTINATION];
        int dest_eta = [contract_info oo_doubleForKey:CONTRACT_KEY_ARRIVAL_TIME] - ship_clock;
        
        if (system_id == dest)
        {
            // no longer needed
            // int premium = 10 * [contract_info oo_floatForKey:CONTRACT_KEY_PREMIUM];
            int fee = 10 * [contract_info oo_floatForKey:CONTRACT_KEY_FEE];
            
            OOCommodityType contract_cargo_type = [contract_info oo_stringForKey:CARGO_KEY_TYPE];
            int contract_amount = [contract_info oo_intForKey:CARGO_KEY_AMOUNT];
            
            int quantity_on_hand =  [shipCommodityData quantityForGood:contract_cargo_type];
 
            // we've arrived in system!
            if (dest_eta > 0)
            {
                // and in good time
                if (quantity_on_hand >= contract_amount)
                {
                    // with the goods too!
                    
                    // remove the goods...
                    [shipCommodityData removeQuantity:contract_amount forGood:contract_cargo_type];
 
                    // pay the premium and fee
                    // credits += fee + premium;
                    // not any more: all contracts initially awarded by JS, so fee
                    // is now all that needs to be paid - CIM
 
                    if ([shipCommodityData exportLegalityForGood:contract_cargo_type] > 0)
                    {
                        [self addRoleToPlayer:@"trader-smuggler"];
                    }
                    else
                    {
                        [self addRoleToPlayer:@"trader"];
                    }
                    
                    credits += fee;
                    [result appendFormatLine:DESC(@"cargo-delivered-okay-@-@"), contract_cargo_desc, OOCredits(fee)];
                    
                    [contracts removeObjectAtIndex:i--];
                    // repute++
                    // +10 as cargo contracts don't have risk modifiers
                    [self increaseContractReputation:10];
                    [self doScriptEvent:OOJSID("playerCompletedContract") withArguments:[NSArray arrayWithObjects:@"cargo",@"success",[NSNumber numberWithUnsignedInteger:fee],contract_info,nil]];
 
                }
                else
                {
                    // see if the amount of goods delivered is acceptable
                    
                    float percent_delivered = 100.0 * (float)quantity_on_hand/(float)contract_amount;
                    float acceptable_ratio = 100.0 - 10.0 * system_id / 256.0; // down to 90%
                    
                    if (percent_delivered >= acceptable_ratio)
                    {
                        // remove the goods...
                        [shipCommodityData setQuantity:0 forGood:contract_cargo_type];
 
                        // pay the fee
                        int shortfall = 100 - percent_delivered;
                        int payment = percent_delivered * (fee) / 100.0;
                        credits += payment;
                        
                        if ([shipCommodityData exportLegalityForGood:contract_cargo_type] > 0)
                        {
                            [self addRoleToPlayer:@"trader-smuggler"];
                        }
                        else
                        {
                            [self addRoleToPlayer:@"trader"];
                        }
 
                        [result appendFormatLine:DESC(@"cargo-delivered-short-@-@-d"), contract_cargo_desc, OOCredits(payment), shortfall];
                        
                        [contracts removeObjectAtIndex:i--];
                        // repute unchanged
                        [self doScriptEvent:OOJSID("playerCompletedContract") withArguments:[NSArray arrayWithObjects:@"cargo",@"short",[NSNumber numberWithUnsignedInteger:payment],contract_info,nil]];
 
                    }
                    else
                    {
                        [result appendFormatLine:DESC(@"cargo-refused-short-%@"), contract_cargo_desc];
                        // The player has still time to buy the missing goods elsewhere and fulfil the contract.
                    }
                }
            }
            else
            {
                // but we're late!
                [result appendFormatLine:DESC(@"cargo-delivered-late-@"), contract_cargo_desc];
 
                [contracts removeObjectAtIndex:i--];
                // repute--
                [self decreaseContractReputation:10];
                [self doScriptEvent:OOJSID("playerCompletedContract") withArguments:[NSArray arrayWithObjects:@"cargo",@"late",[NSNumber numberWithUnsignedInteger:0],contract_info,nil]];
            }
        }
        else
        {
            if (dest_eta < 0)
            {
                // we've run out of time!
                [result appendFormatLine:DESC(@"cargo-failed-@"), contract_cargo_desc];
                
                [contracts removeObjectAtIndex:i--];
                // repute--
                [self decreaseContractReputation:10];
                [self doScriptEvent:OOJSID("playerCompletedContract") withArguments:[NSArray arrayWithObjects:@"cargo",@"failed",[NSNumber numberWithUnsignedInteger:0],contract_info,nil]];
            }
        }
        [contract_info release];
    }
    
    // check passenger_record for expired contracts
    NSArray* names = [passenger_record allKeys];
    for (i = 0; i < [names count]; i++)
    {
        double dest_eta = [passenger_record oo_doubleForKey:[names objectAtIndex:i]] - ship_clock;
        if (dest_eta < 0)
        {
            // check they're not STILL on board
            BOOL on_board = NO;
            unsigned j;
            for (j = 0; j < [passengers count]; j++)
            {
                NSDictionary* passenger_info = [passengers oo_dictionaryAtIndex:j];
                if ([[passenger_info objectForKey:PASSENGER_KEY_NAME] isEqual:[names objectAtIndex:i]])
                    on_board = YES;
            }
            if (!on_board)
            {
                [passenger_record removeObjectForKey:[names objectAtIndex:i]];
            }
        }
    }
    
    // check contract_record for expired contracts
    NSArray* ids = [contract_record allKeys];
    for (i = 0; i < [ids count]; i++)
    {
        double dest_eta = [(NSNumber*)[contract_record objectForKey:[ids objectAtIndex:i]] doubleValue] - ship_clock;
        if (dest_eta < 0)
        {
            [contract_record removeObjectForKey:[ids objectAtIndex:i]];
        }
    }
 
    // check parcel_record for expired deliveries
    ids = [parcel_record allKeys];
    for (i = 0; i < [ids count]; i++)
    {
        double dest_eta = [(NSNumber*)[parcel_record objectForKey:[ids objectAtIndex:i]] doubleValue] - ship_clock;
        if (dest_eta < 0)
        {
            [parcel_record removeObjectForKey:[ids objectAtIndex:i]];
        }
    }
 
    
    if ([result length] == 0)
    {
        result = nil;
    }
    else
    {
        // Should have a trailing \n
        [result deleteCharacterAtIndex:[result length] - 1];
    }
    
    return result;
}
- (NSString *) checkPassengerContracts   // returns messages from any passengers whose status have changed {…}
 
 
- (OOCargoQuantity) contractedVolumeForGood:(OOCommodityType) good
{
    OOCargoQuantity total = 0;
    for (unsigned i = 0; i < [contracts count]; i++)
    {
        NSDictionary* contract_info = [contracts oo_dictionaryAtIndex:i];
        OOCommodityType contract_cargo_type = [contract_info oo_stringForKey:CARGO_KEY_TYPE];
        if ([good isEqualToString:contract_cargo_type])
        {
            total += [contract_info oo_unsignedIntegerForKey:CARGO_KEY_AMOUNT];
        }
    }
    return total;
}
- (OOCargoQuantity) contractedVolumeForGood:(OOCommodityType) good {…}
 
 
- (void) addMessageToReport:(NSString*) report
{
    if ([report length] != 0)
    {
        if ([dockingReport length] == 0)
            [dockingReport appendString:report];
        else
            [dockingReport appendFormat:@"\n\n%@", report];
    }
}
- (void) addMessageToReport:(NSString*) report {…}
 
 
- (NSDictionary*) reputation
{
    return reputation;
}
- (NSDictionary*) reputation {…}
 
 
- (int) passengerReputation
{
    int good = [reputation oo_intForKey:PASSAGE_GOOD_KEY];
    int bad = [reputation oo_intForKey:PASSAGE_BAD_KEY];
    int unknown = [reputation oo_intForKey:PASSAGE_UNKNOWN_KEY];
 
    if (unknown > 0)
        unknown = MAX_CONTRACT_REP - (((2*unknown)+(market_rnd % unknown))/3);
    else
        unknown = MAX_CONTRACT_REP;
    
    return (good + unknown - 3 * bad) / 2;  // return a number from -MAX_CONTRACT_REP to +MAX_CONTRACT_REP
}
- (int) passengerReputation {…}
 
 
- (void) increasePassengerReputation:(unsigned)amount
{
    int good = [reputation oo_intForKey:PASSAGE_GOOD_KEY];
    int bad = [reputation oo_intForKey:PASSAGE_BAD_KEY];
    int unknown = [reputation oo_intForKey:PASSAGE_UNKNOWN_KEY];
    
    for (unsigned i=0;i<amount;i++)
    {
    if (bad > 0)
    {
        // shift a bean from bad to unknown
        bad--;
        if (unknown < MAX_CONTRACT_REP)
            unknown++;
    }
    else
    {
        // shift a bean from unknown to good
        if (unknown > 0)
            unknown--;
        if (good < MAX_CONTRACT_REP)
            good++;
    }
    }
    [reputation oo_setInteger:good      forKey:PASSAGE_GOOD_KEY];
    [reputation oo_setInteger:bad       forKey:PASSAGE_BAD_KEY];
    [reputation oo_setInteger:unknown   forKey:PASSAGE_UNKNOWN_KEY];
}
- (void) increasePassengerReputation:(unsigned)amount {…}
 
 
- (void) decreasePassengerReputation:(unsigned)amount
{
    int good = [reputation oo_intForKey:PASSAGE_GOOD_KEY];
    int bad = [reputation oo_intForKey:PASSAGE_BAD_KEY];
    int unknown = [reputation oo_intForKey:PASSAGE_UNKNOWN_KEY];
    
for (unsigned i=0;i<amount;i++)
    {
    if (good > 0)
    {
        // shift a bean from good to bad
        good--;
        if (bad < MAX_CONTRACT_REP)
            bad++;
    }
    else
    {
        // shift a bean from unknown to bad
        if (unknown > 0)
            unknown--;
        if (bad < MAX_CONTRACT_REP)
            bad++;
    }
    }
    [reputation oo_setInteger:good      forKey:PASSAGE_GOOD_KEY];
    [reputation oo_setInteger:bad       forKey:PASSAGE_BAD_KEY];
    [reputation oo_setInteger:unknown   forKey:PASSAGE_UNKNOWN_KEY];
}
- (void) decreasePassengerReputation:(unsigned)amount {…}
 
 
- (int) parcelReputation
{
    int good = [reputation oo_intForKey:PARCEL_GOOD_KEY];
    int bad = [reputation oo_intForKey:PARCEL_BAD_KEY];
    int unknown = [reputation oo_intForKey:PARCEL_UNKNOWN_KEY];
    
    if (unknown > 0)
        unknown = MAX_CONTRACT_REP - (((2*unknown)+(market_rnd % unknown))/3);
    else
        unknown = MAX_CONTRACT_REP;
    
    return (good + unknown - 3 * bad) / 2;  // return a number from -MAX_CONTRACT_REP to +MAX_CONTRACT_REP
}
- (int) parcelReputation {…}
 
 
- (void) increaseParcelReputation:(unsigned)amount
{
    int good = [reputation oo_intForKey:PARCEL_GOOD_KEY];
    int bad = [reputation oo_intForKey:PARCEL_BAD_KEY];
    int unknown = [reputation oo_intForKey:PARCEL_UNKNOWN_KEY];
 
        for (unsigned i=0;i<amount;i++)
    {
    if (bad > 0)
    {
        // shift a bean from bad to unknown
        bad--;
        if (unknown < MAX_CONTRACT_REP)
            unknown++;
    }
    else
    {
        // shift a bean from unknown to good
        if (unknown > 0)
            unknown--;
        if (good < MAX_CONTRACT_REP)
            good++;
    }
    }
    [reputation oo_setInteger:good      forKey:PARCEL_GOOD_KEY];
    [reputation oo_setInteger:bad       forKey:PARCEL_BAD_KEY];
    [reputation oo_setInteger:unknown   forKey:PARCEL_UNKNOWN_KEY];
}
- (void) increaseParcelReputation:(unsigned)amount {…}
 
 
- (void) decreaseParcelReputation:(unsigned)amount
{
    int good = [reputation oo_intForKey:PARCEL_GOOD_KEY];
    int bad = [reputation oo_intForKey:PARCEL_BAD_KEY];
    int unknown = [reputation oo_intForKey:PARCEL_UNKNOWN_KEY];
    
    for (unsigned i=0;i<amount;i++)
    {
    if (good > 0)
    {
        // shift a bean from good to bad
        good--;
        if (bad < MAX_CONTRACT_REP)
            bad++;
    }
    else
    {
        // shift a bean from unknown to bad
        if (unknown > 0)
            unknown--;
        if (bad < MAX_CONTRACT_REP)
            bad++;
    }
    }
    [reputation oo_setInteger:good      forKey:PARCEL_GOOD_KEY];
    [reputation oo_setInteger:bad       forKey:PARCEL_BAD_KEY];
    [reputation oo_setInteger:unknown   forKey:PARCEL_UNKNOWN_KEY];
}
- (void) decreaseParcelReputation:(unsigned)amount {…}
 
 
- (int) contractReputation
{
    int good = [reputation oo_intForKey:CONTRACTS_GOOD_KEY];
    int bad = [reputation oo_intForKey:CONTRACTS_BAD_KEY];
    int unknown = [reputation oo_intForKey:CONTRACTS_UNKNOWN_KEY];
    
    if (unknown > 0)
        unknown = MAX_CONTRACT_REP - (((2*unknown)+(market_rnd % unknown))/3);
    else
        unknown = MAX_CONTRACT_REP;
    
    return (good + unknown - 3 * bad) / 2;  // return a number from -MAX_CONTRACT_REP to +MAX_CONTRACT_REP
}
- (int) contractReputation {…}
 
 
- (void) increaseContractReputation:(unsigned)amount
{
    int good = [reputation oo_intForKey:CONTRACTS_GOOD_KEY];
    int bad = [reputation oo_intForKey:CONTRACTS_BAD_KEY];
    int unknown = [reputation oo_intForKey:CONTRACTS_UNKNOWN_KEY];
    
    for (unsigned i=0;i<amount;i++)
    {
    if (bad > 0)
    {
        // shift a bean from bad to unknown
        bad--;
        if (unknown < MAX_CONTRACT_REP)
            unknown++;
    }
    else
    {
        // shift a bean from unknown to good
        if (unknown > 0)
            unknown--;
        if (good < MAX_CONTRACT_REP)
            good++;
    }
    }
    [reputation oo_setInteger:good      forKey:CONTRACTS_GOOD_KEY];
    [reputation oo_setInteger:bad       forKey:CONTRACTS_BAD_KEY];
    [reputation oo_setInteger:unknown   forKey:CONTRACTS_UNKNOWN_KEY];
}
- (void) increaseContractReputation:(unsigned)amount {…}
 
 
- (void) decreaseContractReputation:(unsigned)amount
{
    int good = [reputation oo_intForKey:CONTRACTS_GOOD_KEY];
    int bad = [reputation oo_intForKey:CONTRACTS_BAD_KEY];
    int unknown = [reputation oo_intForKey:CONTRACTS_UNKNOWN_KEY];
    
    for (unsigned i=0;i<amount;i++)
    {
    if (good > 0)
    {
        // shift a bean from good to bad
        good--;
        if (bad < MAX_CONTRACT_REP)
            bad++;
    }
    else
    {
        // shift a bean from unknown to bad
        if (unknown > 0)
            unknown--;
        if (bad < MAX_CONTRACT_REP)
            bad++;
    }
    }
    [reputation oo_setInteger:good      forKey:CONTRACTS_GOOD_KEY];
    [reputation oo_setInteger:bad       forKey:CONTRACTS_BAD_KEY];
    [reputation oo_setInteger:unknown   forKey:CONTRACTS_UNKNOWN_KEY];
}
- (void) decreaseContractReputation:(unsigned)amount {…}
 
 
- (void) erodeReputation
{
    int c_good = [reputation oo_intForKey:CONTRACTS_GOOD_KEY];
    int c_bad = [reputation oo_intForKey:CONTRACTS_BAD_KEY];
    int c_unknown = [reputation oo_intForKey:CONTRACTS_UNKNOWN_KEY];
    int p_good = [reputation oo_intForKey:PASSAGE_GOOD_KEY];
    int p_bad = [reputation oo_intForKey:PASSAGE_BAD_KEY];
    int p_unknown = [reputation oo_intForKey:PASSAGE_UNKNOWN_KEY];
    int pl_good = [reputation oo_intForKey:PARCEL_GOOD_KEY];
    int pl_bad = [reputation oo_intForKey:PARCEL_BAD_KEY];
    int pl_unknown = [reputation oo_intForKey:PARCEL_UNKNOWN_KEY];
    
    if (c_unknown < MAX_CONTRACT_REP)
    {
        if (c_bad > 0)
            c_bad--;
        else
        {
            if (c_good > 0)
                c_good--;
        }
        c_unknown++;
    }
    
    if (p_unknown < MAX_CONTRACT_REP)
    {
        if (p_bad > 0)
            p_bad--;
        else
        {
            if (p_good > 0)
                p_good--;
        }
        p_unknown++;
    }
 
    if (pl_unknown < MAX_CONTRACT_REP)
    {
        if (pl_bad > 0)
            pl_bad--;
        else
        {
            if (pl_good > 0)
                pl_good--;
        }
        pl_unknown++;
    }
    
    [reputation setObject:[NSNumber numberWithInt:c_good]       forKey:CONTRACTS_GOOD_KEY];
    [reputation setObject:[NSNumber numberWithInt:c_bad]        forKey:CONTRACTS_BAD_KEY];
    [reputation setObject:[NSNumber numberWithInt:c_unknown]    forKey:CONTRACTS_UNKNOWN_KEY];
    [reputation setObject:[NSNumber numberWithInt:p_good]       forKey:PASSAGE_GOOD_KEY];
    [reputation setObject:[NSNumber numberWithInt:p_bad]        forKey:PASSAGE_BAD_KEY];
    [reputation setObject:[NSNumber numberWithInt:p_unknown]    forKey:PASSAGE_UNKNOWN_KEY];
    [reputation setObject:[NSNumber numberWithInt:pl_good]      forKey:PARCEL_GOOD_KEY];
    [reputation setObject:[NSNumber numberWithInt:pl_bad]       forKey:PARCEL_BAD_KEY];
    [reputation setObject:[NSNumber numberWithInt:pl_unknown]   forKey:PARCEL_UNKNOWN_KEY];
    
}
- (void) erodeReputation {…}
 
 
/* Update reputation levels in case of change in MAX_CONTRACT_REP */
- (void) normaliseReputation
{
    int c_good = [reputation oo_intForKey:CONTRACTS_GOOD_KEY];
    int c_bad = [reputation oo_intForKey:CONTRACTS_BAD_KEY];
    int c_unknown = [reputation oo_intForKey:CONTRACTS_UNKNOWN_KEY];
    int p_good = [reputation oo_intForKey:PASSAGE_GOOD_KEY];
    int p_bad = [reputation oo_intForKey:PASSAGE_BAD_KEY];
    int p_unknown = [reputation oo_intForKey:PASSAGE_UNKNOWN_KEY];
    int pl_good = [reputation oo_intForKey:PARCEL_GOOD_KEY];
    int pl_bad = [reputation oo_intForKey:PARCEL_BAD_KEY];
    int pl_unknown = [reputation oo_intForKey:PARCEL_UNKNOWN_KEY];
 
    int c = c_good + c_bad + c_unknown;
    if (c == 0)
    {
        c_unknown = MAX_CONTRACT_REP;
    }
    else if (c != MAX_CONTRACT_REP)
    {
        c_good = c_good * MAX_CONTRACT_REP / c;
        c_bad = c_bad * MAX_CONTRACT_REP / c;
        c_unknown = MAX_CONTRACT_REP - c_good - c_bad;
    }
 
    int p = p_good + p_bad + p_unknown;
    if (p == 0)
    {
        p_unknown = MAX_CONTRACT_REP;
    }
    else if (p != MAX_CONTRACT_REP)
    {
        p_good = p_good * MAX_CONTRACT_REP / p;
        p_bad = p_bad * MAX_CONTRACT_REP / p;
        p_unknown = MAX_CONTRACT_REP - p_good - p_bad;
    }
    
    int pl = pl_good + pl_bad + pl_unknown;
    if (pl == 0)
    {
        pl_unknown = MAX_CONTRACT_REP;
    }
    else if (pl != MAX_CONTRACT_REP)
    {
        pl_good = pl_good * MAX_CONTRACT_REP / pl;
        pl_bad = pl_bad * MAX_CONTRACT_REP / pl;
        pl_unknown = MAX_CONTRACT_REP - pl_good - pl_bad;
    }
 
    [reputation setObject:[NSNumber numberWithInt:c_good]       forKey:CONTRACTS_GOOD_KEY];
    [reputation setObject:[NSNumber numberWithInt:c_bad]        forKey:CONTRACTS_BAD_KEY];
    [reputation setObject:[NSNumber numberWithInt:c_unknown]    forKey:CONTRACTS_UNKNOWN_KEY];
    [reputation setObject:[NSNumber numberWithInt:p_good]       forKey:PASSAGE_GOOD_KEY];
    [reputation setObject:[NSNumber numberWithInt:p_bad]        forKey:PASSAGE_BAD_KEY];
    [reputation setObject:[NSNumber numberWithInt:p_unknown]    forKey:PASSAGE_UNKNOWN_KEY];
    [reputation setObject:[NSNumber numberWithInt:pl_good]      forKey:PARCEL_GOOD_KEY];
    [reputation setObject:[NSNumber numberWithInt:pl_bad]       forKey:PARCEL_BAD_KEY];
    [reputation setObject:[NSNumber numberWithInt:pl_unknown]   forKey:PARCEL_UNKNOWN_KEY];
    
}
- (void) normaliseReputation {…}
 
 
- (BOOL) addPassenger:(NSString*)Name start:(unsigned)start destination:(unsigned)Destination eta:(double)eta fee:(double)fee advance:(double)advance risk:(unsigned)risk
{
    NSDictionary* passenger_info = [NSDictionary dictionaryWithObjectsAndKeys:
        Name,                                           PASSENGER_KEY_NAME,
        [NSNumber numberWithInt:start],                 CONTRACT_KEY_START,
        [NSNumber numberWithInt:Destination],           CONTRACT_KEY_DESTINATION,
        [NSNumber numberWithDouble:[PLAYER clockTime]], CONTRACT_KEY_DEPARTURE_TIME,
        [NSNumber numberWithDouble:eta],                CONTRACT_KEY_ARRIVAL_TIME,
        [NSNumber numberWithDouble:fee],                CONTRACT_KEY_FEE,
        [NSNumber numberWithDouble:advance],            CONTRACT_KEY_PREMIUM,
        [NSNumber numberWithUnsignedInt:risk],          CONTRACT_KEY_RISK,
 
        NULL];
    
    // extra checks, just in case.
    if ([passengers count] >= max_passengers || [passenger_record objectForKey:Name] != nil) return NO;
        
    if (risk > 1)
    {
        [self addRoleToPlayer:@"trader-courier+"];
    }
 
    [passengers addObject:passenger_info];
    [passenger_record setObject:[NSNumber numberWithDouble:eta] forKey:Name];
 
    [self doScriptEvent:OOJSID("playerEnteredContract") withArguments:[NSArray arrayWithObjects:@"passenger",passenger_info,nil]];
 
    return YES;
}
- (BOOL) addPassenger:(NSString*)Name start:(unsigned)start destination:(unsigned)Destination eta:(double)eta fee:(double)fee advance:(double)advance risk:(unsigned)risk {…}
 
 
- (BOOL) removePassenger:(NSString*)Name    // removes the first passenger that answers to Name, returns NO if none found
{   
    // extra check, just in case.
    if ([passengers count] == 0) return NO;
    
    unsigned            i;
    
    for (i = 0; i < [passengers count]; i++)
    {
        NSString        *this_name = [[passengers oo_dictionaryAtIndex:i] oo_stringForKey:PASSENGER_KEY_NAME];
        
        if ([Name isEqualToString:this_name])
        {
            [passengers removeObjectAtIndex:i];
            [passenger_record removeObjectForKey:Name];
            return YES;
        }
    }
    
    return NO;
}
- (BOOL) removePassenger:(NSString*)Name    // removes the first passenger that answers to Name, returns NO if none found {…}
 
 
- (BOOL) addParcel:(NSString*)Name start:(unsigned)start destination:(unsigned)Destination eta:(double)eta fee:(double)fee premium:(double)premium risk:(unsigned)risk
{
    NSDictionary* parcel_info = [NSDictionary dictionaryWithObjectsAndKeys:
        Name,                                           PASSENGER_KEY_NAME,
        [NSNumber numberWithInt:start],                 CONTRACT_KEY_START,
        [NSNumber numberWithInt:Destination],           CONTRACT_KEY_DESTINATION,
        [NSNumber numberWithDouble:[PLAYER clockTime]], CONTRACT_KEY_DEPARTURE_TIME,
        [NSNumber numberWithDouble:eta],                CONTRACT_KEY_ARRIVAL_TIME,
        [NSNumber numberWithDouble:fee],                CONTRACT_KEY_FEE,
        [NSNumber numberWithDouble:premium],            CONTRACT_KEY_PREMIUM,
        [NSNumber numberWithUnsignedInt:risk],          CONTRACT_KEY_RISK,
        NULL];
    
    // extra checks, just in case.
    // FIXME: do we absolutely need this check? can we live
    // with parcels of senders who happen to have the same
    // name? - Nikos 20160527
    //if ([parcel_record objectForKey:Name] != nil) return NO;
 
    if (risk > 1)
    {
        [self addRoleToPlayer:@"trader-courier+"];
    }
        
    [parcels addObject:parcel_info];
    [parcel_record setObject:[NSNumber numberWithDouble:eta] forKey:Name];
 
    [self doScriptEvent:OOJSID("playerEnteredContract") withArguments:[NSArray arrayWithObjects:@"parcel",parcel_info,nil]];
 
    return YES;
}
- (BOOL) addParcel:(NSString*)Name start:(unsigned)start destination:(unsigned)Destination eta:(double)eta fee:(double)fee premium:(double)premium risk:(unsigned)risk {…}
 
 
- (BOOL) removeParcel:(NSString*)Name   // removes the first parcel that answers to Name, returns NO if none found
{   
    // extra check, just in case.
    if ([parcels count] == 0) return NO;
    
    unsigned            i;
    
    for (i = 0; i < [parcels count]; i++)
    {
        NSString        *this_name = [[parcels oo_dictionaryAtIndex:i] oo_stringForKey:PASSENGER_KEY_NAME];
        
        if ([Name isEqualToString:this_name])
        {
            [parcels removeObjectAtIndex:i];
            [parcel_record removeObjectForKey:Name];
            return YES;
        }
    }
    
    return NO;
}
- (BOOL) removeParcel:(NSString*)Name   // removes the first parcel that answers to Name, returns NO if none found {…}
 
 
- (BOOL) awardContract:(unsigned)qty commodity:(OOCommodityType)type start:(unsigned)start
                     destination:(unsigned)Destination eta:(double)eta fee:(double)fee premium:(double)premium
{
 
    unsigned        sr1 = Ranrot()&0x111111;
    int             sr2 = Ranrot()&0x111111;
 
    NSString        *cargo_ID =[NSString stringWithFormat:@"%06x-%06x", sr1, sr2];
    
    if (![[UNIVERSE commodities] goodDefined:type])  return NO;
    if (qty < 1)  return NO;
    
    // avoid duplicate cargo_IDs
    while ([contract_record objectForKey:cargo_ID] != nil)
    {
        sr2++;
        cargo_ID =[NSString stringWithFormat:@"%06x-%06x", sr1, sr2];
    }
 
    NSDictionary* cargo_info = [NSDictionary dictionaryWithObjectsAndKeys:
        cargo_ID,                                       CARGO_KEY_ID,
        type,                                           CARGO_KEY_TYPE,
        [NSNumber numberWithInt:qty],                   CARGO_KEY_AMOUNT,
        [UNIVERSE describeCommodity:type amount:qty],   CARGO_KEY_DESCRIPTION,
        [NSNumber numberWithInt:start],                 CONTRACT_KEY_START,
        [NSNumber numberWithInt:Destination],           CONTRACT_KEY_DESTINATION,
        [NSNumber numberWithDouble:[PLAYER clockTime]], CONTRACT_KEY_DEPARTURE_TIME,
        [NSNumber numberWithDouble:eta],                CONTRACT_KEY_ARRIVAL_TIME,
        [NSNumber numberWithDouble:fee],                CONTRACT_KEY_FEE,
        [NSNumber numberWithDouble:premium],                        CONTRACT_KEY_PREMIUM,
        NULL];
    
    // check available space
    
    OOCargoQuantity      cargoSpaceRequired = qty;
    OOMassUnit            contractCargoUnits  = [shipCommodityData massUnitForGood:type];
    
    if (contractCargoUnits == UNITS_KILOGRAMS)  cargoSpaceRequired /= 1000;
    if (contractCargoUnits == UNITS_GRAMS)  cargoSpaceRequired /= 1000000;
    
    if (cargoSpaceRequired > [self availableCargoSpace]) return NO;
 
    [shipCommodityData addQuantity:qty forGood:type];
 
    current_cargo = [self cargoQuantityOnBoard];
 
    if ([shipCommodityData exportLegalityForGood:type] > 0)
    {
        [self addRoleToPlayer:@"trader-smuggler"];
        [roleWeightFlags setObject:[NSNumber numberWithInt:1] forKey:@"bought-illegal"];
    }
    else
    {
        [self addRoleToPlayer:@"trader"];
        [roleWeightFlags setObject:[NSNumber numberWithInt:1] forKey:@"bought-legal"];
    }
 
    [contracts addObject:cargo_info];
    [contract_record setObject:[NSNumber numberWithDouble:eta] forKey:cargo_ID];
 
    [self doScriptEvent:OOJSID("playerEnteredContract") withArguments:[NSArray arrayWithObjects:@"cargo",cargo_info,nil]];
 
    return YES;
}
- (BOOL) awardContract:(unsigned)qty commodity:(OOCommodityType)type start:(unsigned)start {…}
 
 
- (BOOL) removeContract:(OOCommodityType)type destination:(unsigned)dest // removes the first match found, returns NO if none found
{
    if ([contracts count] == 0 || dest > 255)  return NO;
 
    if (![[UNIVERSE commodities] goodDefined:type])  return NO;
    
    unsigned            i;
    
    for (i = 0; i < [contracts count]; i++)
    {
        NSDictionary        *contractInfo = [contracts oo_dictionaryAtIndex:i];
        unsigned            cargoDest = [contractInfo oo_intForKey:CONTRACT_KEY_DESTINATION];
        OOCommodityType      cargoType = [contractInfo oo_stringForKey:CARGO_KEY_TYPE];
        
        if ([cargoType isEqualToString:type] && cargoDest == dest)
        {
            [contract_record removeObjectForKey:[contractInfo oo_stringForKey:CARGO_KEY_ID]];
            [contracts removeObjectAtIndex:i];
            return YES;
        }
    }
    
    return NO;
}
- (BOOL) removeContract:(OOCommodityType)type destination:(unsigned)dest // removes the first match found, returns NO if none found {…}
 
 
 
 
- (NSArray*) passengerList
{
    return [self contractsListFromArray:passengers forCargo:NO forParcels:NO];
}
- (NSArray*) passengerList {…}
 
 
- (NSArray*) parcelList
{
    return [self contractsListFromArray:parcels forCargo:NO forParcels:YES];
}
- (NSArray*) parcelList {…}
 
 
- (NSArray*) contractList
{
    return [self contractsListFromArray:contracts forCargo:YES forParcels:NO];
}
- (NSArray*) contractList {…}
 
 
- (NSArray*) contractsListFromArray:(NSArray *) contracts_array forCargo:(BOOL) forCargo forParcels:(BOOL)forParcels
{
    // check  contracts
    NSMutableArray  *result = [NSMutableArray arrayWithCapacity:5];
    NSString        *formatString = (forCargo||forParcels) ? @"oolite-manifest-item-delivery" : @"oolite-manifest-person-travelling";
    unsigned i;
    for (i = 0; i < [contracts_array count]; i++)
    {
        NSDictionary* contract_info = (NSDictionary *)[contracts_array objectAtIndex:i];
        NSString* label = [contract_info oo_stringForKey:forCargo ? CARGO_KEY_DESCRIPTION : PASSENGER_KEY_NAME];
        // the system name can change via script. The following PASSENGER_KEYs are identical to the corresponding CONTRACT_KEYs
        NSString* destination = [UNIVERSE getSystemName: [contract_info oo_intForKey:CONTRACT_KEY_DESTINATION]];
        int dest_eta = [contract_info oo_doubleForKey:CONTRACT_KEY_ARRIVAL_TIME] - ship_clock;
        NSString *deadline = [UNIVERSE shortTimeDescription:dest_eta];
 
        OOCreditsQuantity fee = [contract_info oo_intForKey:CONTRACT_KEY_FEE];
        NSString *feeDesc = OOIntCredits(fee);
 
        [result addObject:OOExpandKey(formatString, label, destination, deadline, feeDesc)];
 
    }
    
    return result;
}
- (NSArray*) contractsListFromArray:(NSArray *) contracts_array forCargo:(BOOL) forCargo forParcels:(BOOL)forParcels {…}
 
 
// only use within setGuiToManifestScreen
#define SET_MANIFEST_ROW(obj,color,row) ([self setManifestScreenRow:obj inColor:color forRow:row ofRows:max_rows andOffset:page_offset inMultipage:multi_page])
 
- (void) setGuiToManifestScreen
{
    OOGUIScreenID  oldScreen = gui_screen;
    
    GuiDisplayGen  *gui = [UNIVERSE gui];
    gui_screen = GUI_SCREEN_MANIFEST;
    BOOL            guiChanged = (oldScreen != gui_screen);
    if (guiChanged)
    {
        [gui setStatusPage:0]; // need to do this earlier than the rest
    }
    
    // GUI stuff
    {
        NSInteger current, max;
        OOColor *subheadColor = [gui colorFromSetting:kGuiManifestSubheadColor defaultValue:[OOColor greenColor]];
        OOColor *entryColor = [gui colorFromSetting:kGuiManifestEntryColor defaultValue:nil];
        OOColor *scrollColor = [gui colorFromSetting:kGuiManifestScrollColor defaultValue:[OOColor greenColor]];
        OOColor *noScrollColor = [gui colorFromSetting:kGuiManifestNoScrollColor defaultValue:[OOColor darkGrayColor]];
 
        NSArray*    cargoManifest = [self cargoList];
        NSArray*    missionsManifest = [self missionsList];
        
        NSUInteger  i = 0;
        NSUInteger  max_rows = 20;
        NSUInteger  manifestCount = [cargoManifest count];
        NSUInteger  cargoRowCount = (manifestCount + 1)/2;
        OOGUIRow    cargoRow = 2;
        OOGUIRow    missionsRow = 2;
        
        OOGUIRow    nextPageRow = MANIFEST_SCREEN_ROW_NEXT;
        // show extra lines if no HUD is displayed.
        if ([[self hud] isHidden] || [[self hud] allowBigGui])
        {
            max_rows += 7;
            nextPageRow += 7;
        }
 
        NSUInteger mmRows = 0;
        id mmEntry = nil;
        foreach (mmEntry, missionsManifest)
        {
            if ([mmEntry isKindOfClass:[NSString class]])
            {
                ++mmRows;
            }
            else if ([mmEntry isKindOfClass:[NSArray class]])
            {
                mmRows += [(NSArray *)mmEntry count];
            }
        }
        
        NSInteger page_offset = 0;
        BOOL multi_page = NO;
//      NSUInteger total_rows = cargoRowCount + MAX(1U,[passengerManifest count]) + MAX(1U,[contractManifest count]) + mmRows + MAX(1U,[parcelManifest count]) + 5;
        NSUInteger total_rows = cargoRowCount + mmRows + 5;
        if (total_rows > max_rows)
        {
            max_rows -= 2;
            page_offset = ([gui statusPage]-1) * max_rows;
            if (page_offset < 0 || (NSUInteger)page_offset >= total_rows)
            {
                [gui setStatusPage:0];
                page_offset = 0;
            }
            multi_page = YES;
        }
 
 
        OOGUITabSettings tab_stops;
        tab_stops[0] = 0;
        tab_stops[1] = 256;
        [gui overrideTabs:tab_stops from:kGuiManifestTabs length:3];
        [gui setTabStops:tab_stops];
        
        // Cargo Manifest
        current_cargo = [self cargoQuantityOnBoard];
 
        [gui clearAndKeepBackground:!guiChanged];
        [gui setTitle:DESC(@"manifest-title")];
        
        current = current_cargo;
        max = [self maxAvailableCargoSpace];
        NSString *cargoString = OOExpandKey(@"oolite-manifest-cargo", current, max);
        current = [[self passengerList] count];
        max = max_passengers;
        NSString *cabinString = OOExpandKey(@"oolite-manifest-cabins", current, max);
        NSArray *manifestHeader = [NSArray arrayWithObjects:cargoString,cabinString,nil];
 
        SET_MANIFEST_ROW( manifestHeader , entryColor, cargoRow - 1);
        
        if (manifestCount > 0)
        {
            for (i = 0; i < cargoRowCount; i++)
            {
                NSMutableArray*     row_info = [NSMutableArray arrayWithCapacity:3];
                // i is always smaller than manifest_count, no need to test.
                [row_info addObject:[cargoManifest objectAtIndex:i]];
                if (i + cargoRowCount < manifestCount)
                {
                    [row_info addObject:[cargoManifest objectAtIndex:i + cargoRowCount]];
                }
                else
                {
                    [row_info addObject:@""];
                }
                SET_MANIFEST_ROW( (NSArray *)row_info, subheadColor, cargoRow + i);
            }
        }
        else
        {
            SET_MANIFEST_ROW( (DESC(@"manifest-none")), subheadColor, cargoRow);
            cargoRowCount=1;
        }
        
        missionsRow = cargoRow + cargoRowCount + 1;
        
        // Missions Manifest
        manifestCount = [missionsManifest count];
        
        if (manifestCount > 0)
        {
            if ([[missionsManifest objectAtIndex:0] isKindOfClass:[NSString class]])
            {
                // then there's at least one without its own heading
                // to go under the generic 'missions' heading
                SET_MANIFEST_ROW( (DESC(@"manifest-missions")) , entryColor, missionsRow - 1);
            }
            else
            {
                missionsRow--;
            }
            
            NSUInteger mmRow = 0;
            for (i = 0; i < manifestCount; i++)
            {
                NSString *mmItem = nil;
                mmEntry = [missionsManifest objectAtIndex:i];
                if ([mmEntry isKindOfClass:[NSString class]])
                {
                    mmItem = [NSString stringWithFormat:@"\t%@",(NSString *)mmEntry];
                    SET_MANIFEST_ROW( (mmItem) , subheadColor, missionsRow + mmRow);
                    ++mmRow;
                }
                else if ([mmEntry isKindOfClass:[NSArray class]])
                {
                    BOOL isHeading = YES;
                    foreach (mmItem, mmEntry)
                    {
                        if (isHeading)
                        {
                            SET_MANIFEST_ROW( ((NSString *)mmItem) , entryColor , missionsRow + mmRow);
                        }
                        else
                        {
                            mmItem = [NSString stringWithFormat:@"\t%@",(NSString *)mmItem];
                            SET_MANIFEST_ROW( ((NSString *)mmItem) , subheadColor , missionsRow + mmRow);
                        }
                        isHeading = NO;
                        ++mmRow;
                    }
                }
            }
        }
        
        if (multi_page)
        {
            OOGUIRow r_start = MANIFEST_SCREEN_ROW_BACK;
            OOGUIRow r_end = nextPageRow;
            if (page_offset > 0)
            {
                [gui setColor:scrollColor forRow:MANIFEST_SCREEN_ROW_BACK];
                [gui setKey:GUI_KEY_OK forRow:MANIFEST_SCREEN_ROW_BACK];
            }
            else
            {
                [gui setColor:noScrollColor forRow:MANIFEST_SCREEN_ROW_BACK];
                r_start = nextPageRow;
            }
            [gui setArray:[NSArray arrayWithObjects:DESC(@"gui-back"), @" <-- ",nil] forRow:MANIFEST_SCREEN_ROW_BACK];
 
            if (total_rows > max_rows + page_offset)
            {
                [gui setColor:scrollColor forRow:nextPageRow];
                [gui setKey:GUI_KEY_OK forRow:nextPageRow];
            }
            else
            {
                [gui setColor:noScrollColor forRow:nextPageRow];
                r_end = MANIFEST_SCREEN_ROW_BACK;
            }
            [gui setArray:[NSArray arrayWithObjects:DESC(@"gui-more"), @" --> ",nil] forRow:nextPageRow];
 
            [gui setSelectableRange:NSMakeRange(r_start,r_end+1-r_start)];
            [gui setSelectedRow:r_start];
 
        }
 
        [gui setShowTextCursor:NO];
    }
    /* ends */
    
    if (lastTextKey)
    {
        [lastTextKey release];
        lastTextKey = nil;
    }
    
    [self setShowDemoShips:NO];
    [UNIVERSE enterGUIViewModeWithMouseInteraction:NO];
    
    if (guiChanged)
    {
        [gui setForegroundTextureKey:[self status] == STATUS_DOCKED ? @"docked_overlay" : @"overlay"];
        [gui setBackgroundTextureKey:@"manifest"];
        [self noteGUIDidChangeFrom:oldScreen to:gui_screen];
    }
}
- (void) setGuiToManifestScreen {…}
 
 
- (void) setManifestScreenRow:(id)object inColor:(OOColor*)color forRow:(OOGUIRow)row ofRows:(OOGUIRow)max_rows andOffset:(OOGUIRow)offset inMultipage:(BOOL)multi
{
    OOGUIRow disp_row = row - offset;
    if (disp_row < 1 || disp_row > max_rows) return;
    if (multi) disp_row++;
    GuiDisplayGen  *gui = [UNIVERSE gui];
    if ([object isKindOfClass:[NSString class]])
    {
        [gui setText:(NSString*)object forRow:disp_row];
    }
    else if ([object isKindOfClass:[NSArray class]])
    {
        [gui setArray:(NSArray*)object forRow:disp_row];
    }
    [gui setColor:color forRow:disp_row];
}
- (void) setManifestScreenRow:(id)object inColor:(OOColor*)color forRow:(OOGUIRow)row ofRows:(OOGUIRow)max_rows andOffset:(OOGUIRow)offset inMultipage:(BOOL)multi {…}
 
 
- (void) setGuiToDockingReportScreen
{
    GuiDisplayGen  *gui = [UNIVERSE gui];
    
    OOGUIScreenID  oldScreen = gui_screen;
    gui_screen = GUI_SCREEN_REPORT;
    BOOL            guiChanged = (oldScreen != gui_screen); 
    
    OOGUIRow        i, text_row = 1;
    
    [dockingReport setString:[dockingReport stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];
    
    // GUI stuff
    {
        [gui clearAndKeepBackground:!guiChanged];
        [gui setTitle:OOExpandKey(@"arrival-report-title")];
        
        for (i=1;i<=18;i++) {
            [gui setColor:[gui colorFromSetting:kGuiDockingReportColor defaultValue:nil] forRow:21];
        }
        
        // dockingReport might be a multi-line message
        
        while (([dockingReport length] > 0)&&(text_row < 18))
        {
            if ([dockingReport rangeOfString:@"\n"].location != NSNotFound)
            {
                while (([dockingReport rangeOfString:@"\n"].location != NSNotFound)&&(text_row < 18))
                {
                    NSUInteger line_break = [dockingReport rangeOfString:@"\n"].location;
                    NSString* line = [dockingReport substringToIndex:line_break];
                    [dockingReport deleteCharactersInRange: NSMakeRange( 0, line_break + 1)];
                    text_row = [gui addLongText:line startingAtRow:text_row align:GUI_ALIGN_LEFT];
                }
                [dockingReport setString:[dockingReport stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];
            }
            else
            {
                text_row = [gui addLongText:[NSString stringWithString:dockingReport] startingAtRow:text_row align:GUI_ALIGN_LEFT];
                [dockingReport setString:@""];
            }
        }
        
        [gui setText:[NSString stringWithFormat:DESC_PLURAL(@"contracts-cash-@-load-d-of-d-passengers-d-of-d-berths", max_passengers), OOCredits(credits), current_cargo, [self maxAvailableCargoSpace], [passengers count], max_passengers]  forRow: GUI_ROW_MARKET_CASH];
        [gui setColor:[gui colorFromSetting:kGuiDockingSummaryColor defaultValue:nil] forRow:GUI_ROW_MARKET_CASH];        
 
        [gui setText:DESC(@"press-space-commander") forRow:21 align:GUI_ALIGN_CENTER];
        [gui setColor:[gui colorFromSetting:kGuiDockingContinueColor defaultValue:nil] forRow:21];
        [gui setShowTextCursor:NO];
    }
    /* ends */
    
    if (lastTextKey)
    {
        [lastTextKey release];
        lastTextKey = nil;
    }
    
    [self setShowDemoShips:NO];
    [UNIVERSE enterGUIViewModeWithMouseInteraction:NO];
    
    if (guiChanged)
    {
        [gui setForegroundTextureKey:@"docked_overlay"];  // has to be docked!
        
        NSDictionary *bgDescriptor = [UNIVERSE screenTextureDescriptorForKey:@"report"];
        if (bgDescriptor == nil) bgDescriptor = [UNIVERSE screenTextureDescriptorForKey:@"status_docked"];
        if (bgDescriptor == nil) bgDescriptor = [UNIVERSE screenTextureDescriptorForKey:@"status"];
        [gui setBackgroundTextureDescriptor:bgDescriptor];
        [self noteGUIDidChangeFrom:oldScreen to:gui_screen];
    }
}
- (void) setGuiToDockingReportScreen {…}
 
// ---------------------------------------------------------------------- 
 
static NSMutableDictionary *currentShipyard = nil;
 
 
- (OOCreditsQuantity) priceForShipKey:(NSString *)key
{
    NSDictionary *shipInfo = [currentShipyard oo_dictionaryForKey:key];
    return [shipInfo oo_unsignedLongLongForKey:SHIPYARD_KEY_PRICE];
}
- (OOCreditsQuantity) priceForShipKey:(NSString *)key {…}
 
 
- (void) setGuiToShipyardScreen:(NSUInteger)skip
{
    OOGUIScreenID  oldScreen = gui_screen;
    
    GuiDisplayGen  *gui = [UNIVERSE gui];
    gui_screen = GUI_SCREEN_SHIPYARD;
    BOOL            guiChanged = (oldScreen != gui_screen); 
    
    unsigned        i;
    
    // set up initial market if there is none
    OOTechLevelID stationTechLevel;
    StationEntity *station = [self dockedStation];
    
    if (station != nil)
    {
        stationTechLevel = [station equivalentTechLevel];
    }
    else
    {
        station  = [UNIVERSE station];
        stationTechLevel = NSNotFound;
    }
    if ([station localShipyard] == nil)
    {
        [station generateShipyard:stationTechLevel];
    }
        
    NSMutableArray *shipyard = [station localShipyard];
        
    [currentShipyard release];
    currentShipyard = [[NSMutableDictionary alloc] initWithCapacity:[shipyard count]];
 
    for (i = 0; i < [shipyard count]; i++)
    {
        [currentShipyard setObject:[shipyard objectAtIndex:i]
                            forKey:[[shipyard oo_dictionaryAtIndex:i] oo_stringForKey:SHIPYARD_KEY_ID]];
    }
    
    NSUInteger shipCount = [shipyard count];
 
    //error check
    if (skip >= shipCount)  skip = shipCount - 1;
    if (skip < 2)  skip = 0;
    
    // GUI stuff
    {
        [gui clearAndKeepBackground:!guiChanged];
        NSString *system = [UNIVERSE getSystemName:system_id];
        [gui setTitle:OOExpandKey(@"shipyard-title", system)];
        
        OOGUITabSettings tab_stops;
        tab_stops[0] = 0;
        tab_stops[1] = -258;
        tab_stops[2] = 270;
        tab_stops[3] = 370;
        tab_stops[4] = 450;
        [gui overrideTabs:tab_stops from:kGuiShipyardTabs length:5];
        [gui setTabStops:tab_stops];
        
        int rowCount = MAX_ROWS_SHIPS_FOR_SALE;
        int startRow = GUI_ROW_SHIPYARD_START;
        NSInteger previous = 0;
        
        if (shipCount <= MAX_ROWS_SHIPS_FOR_SALE)
            skip = 0;
        else
        {
            if (skip > 0)
            {
                rowCount -= 1;
                startRow += 1;
                previous = skip - MAX_ROWS_SHIPS_FOR_SALE + 2;
                if (previous < 2)
                    previous = 0;
            }
            if (skip + rowCount < shipCount)
                rowCount -= 1;
        }
        
        if (shipCount > 0)
        {
            [gui setColor:[gui colorFromSetting:kGuiShipyardHeadingColor defaultValue:[OOColor greenColor]] forRow:GUI_ROW_SHIPYARD_LABELS];
            [gui setArray:[NSArray arrayWithObjects:DESC(@"shipyard-shiptype"), DESC(@"shipyard-price-label"),
                    DESC(@"shipyard-cargo-label"), DESC(@"shipyard-speed-label"), nil] forRow:GUI_ROW_SHIPYARD_LABELS];
 
            if (skip > 0)
            {
                [gui setColor:[gui colorFromSetting:kGuiShipyardScrollColor defaultValue:[OOColor greenColor]] forRow:GUI_ROW_SHIPYARD_START];
                [gui setArray:[NSArray arrayWithObjects:DESC(@"gui-back"), @" <-- ", nil] forRow:GUI_ROW_SHIPYARD_START];
                [gui setKey:[NSString stringWithFormat:@"More:%ld", previous] forRow:GUI_ROW_SHIPYARD_START];
            }
            for (i = 0; i < (shipCount - skip) && (int)i < rowCount; i++)
            {
                NSDictionary* ship_info = [shipyard oo_dictionaryAtIndex:i + skip];
                OOCreditsQuantity ship_price = [ship_info oo_unsignedLongLongForKey:SHIPYARD_KEY_PRICE];
                [gui setColor:[gui colorFromSetting:kGuiShipyardEntryColor defaultValue:nil] forRow:startRow + i];
                [gui setArray:[NSArray arrayWithObjects:
                        [NSString stringWithFormat:@" %@ ",[[ship_info oo_dictionaryForKey:SHIPYARD_KEY_SHIP] oo_stringForKey:@"display_name" defaultValue:[[ship_info oo_dictionaryForKey:SHIPYARD_KEY_SHIP] oo_stringForKey:KEY_NAME]]],
                        OOIntCredits(ship_price),
                        nil]
                    forRow:startRow + i];
                [gui setKey:(NSString*)[ship_info objectForKey:SHIPYARD_KEY_ID] forRow:startRow + i];
            }
            if (i < shipCount - skip)
            {
                [gui setColor:[gui colorFromSetting:kGuiShipyardScrollColor defaultValue:[OOColor greenColor]] forRow:startRow + i];
                [gui setArray:[NSArray arrayWithObjects:DESC(@"gui-more"), @" --> ", nil] forRow:startRow + i];
                [gui setKey:[NSString stringWithFormat:@"More:%ld", rowCount + skip] forRow:startRow + i];
                i++;
            }
 
            [gui setSelectableRange:NSMakeRange( GUI_ROW_SHIPYARD_START, i + startRow - GUI_ROW_SHIPYARD_START)];
            // ensure that at least one row is selected at all times
            if(shipCount == 1)  [gui setFirstSelectableRow];
            [self showShipyardInfoForSelection];
        }
        else
        {
            [gui setText:DESC(@"shipyard-no-ships-available-for-purchase") forRow:GUI_ROW_NO_SHIPS align:GUI_ALIGN_CENTER];
            [gui setColor:[gui colorFromSetting:kGuiShipyardNoshipColor defaultValue:[OOColor greenColor]] forRow:GUI_ROW_NO_SHIPS];
            
            [gui setNoSelectedRow];
        }
        
        [self showTradeInInformationFooter];
        
        [gui setShowTextCursor:NO];
    }
    
    // the following are necessary...
 
    [self setShowDemoShips:(shipCount > 0)];
    [UNIVERSE enterGUIViewModeWithMouseInteraction:YES];
    
    if (guiChanged)
    {
        [gui setForegroundTextureKey:@"docked_overlay"];
        [gui setBackgroundTextureKey:@"shipyard"];
    }
}
- (void) setGuiToShipyardScreen:(NSUInteger)skip {…}
 
 
- (void) showShipyardInfoForSelection
{
    NSUInteger      i;
    GuiDisplayGen  *gui = [UNIVERSE gui];
    OOGUIRow        sel_row = [gui selectedRow];
    
    if (sel_row <= 0)  return;
    
    NSMutableArray *row_info = [NSMutableArray arrayWithArray:(NSArray*)[gui objectForRow:GUI_ROW_SHIPYARD_LABELS]];
    while ([row_info count] < 4)
    {
        [row_info addObject:@""];
    }
    
    NSString *key = [gui keyForRow:sel_row];
    
    NSDictionary *info = [currentShipyard oo_dictionaryForKey:key];
 
    // clean up the display ready for the newly-selected ship (if there is one)
    [row_info replaceObjectAtIndex:2 withObject:@""];
    [row_info replaceObjectAtIndex:3 withObject:@""];
    for (i = GUI_ROW_SHIPYARD_INFO_START; i < GUI_ROW_MARKET_CASH - 1; i++)
    {
        [gui setText:@"" forRow:i];
        [gui setColor:[gui colorFromSetting:kGuiShipyardDescriptionColor defaultValue:[OOColor greenColor]] forRow:i];
    }
    [UNIVERSE removeDemoShips];
 
    if (info)
    {
        // the key is a particular ship - show the details
        NSString *salesPitch = [info oo_stringForKey:KEY_SHORT_DESCRIPTION];
        NSDictionary *shipDict = [info oo_dictionaryForKey:SHIPYARD_KEY_SHIP];
        
        int cargoRating = [shipDict oo_intForKey:@"max_cargo"];
        int cargo_extra;
        cargo_extra = [shipDict oo_intForKey:@"extra_cargo" defaultValue:15];
        float speedRating = 0.001 * [shipDict oo_intForKey:@"max_flight_speed"];
        
        NSArray *shipExtras = [info oo_arrayForKey:KEY_EQUIPMENT_EXTRAS];
        for (i = 0; i < [shipExtras count]; i++)
        {
            if ([[shipExtras oo_stringAtIndex:i] isEqualToString:@"EQ_CARGO_BAY"])
            {
                cargoRating += cargo_extra;
            }
            else if ([[shipExtras oo_stringAtIndex:i] isEqualToString:@"EQ_PASSENGER_BERTH"])
            {
                cargoRating -= PASSENGER_BERTH_SPACE;
            }
        }
        
        [row_info replaceObjectAtIndex:2 withObject:OOExpandKey(@"shipyard-cargo-value", cargoRating)];
        [row_info replaceObjectAtIndex:3 withObject:OOExpandKey(@"shipyard-speed-value", speedRating)];
        
        // Show footer first. It'll be overwritten by the sales_pitch if that text is longer than usual.
        [self showTradeInInformationFooter];
        i = [gui addLongText:salesPitch startingAtRow:GUI_ROW_SHIPYARD_INFO_START align:GUI_ALIGN_LEFT];
        if (i - 1 >= GUI_ROW_MARKET_CASH - 1)
        {
            [gui setColor:[gui colorFromSetting:kGuiShipyardDescriptionColor defaultValue:[OOColor greenColor]] forRow:i - 1];
            [gui setColor:[gui colorFromSetting:kGuiShipyardDescriptionColor defaultValue:[OOColor greenColor]] forRow:GUI_ROW_MARKET_CASH - 1];
        }
        
        // now display the ship
        [self showShipyardModel:[info oo_stringForKey:SHIPYARD_KEY_SHIPDATA_KEY]
                       shipData:shipDict
                    personality:[info oo_unsignedShortForKey:SHIPYARD_KEY_PERSONALITY]];
    }
    else
    {
        // the key is a particular model of ship which we must expand...
        // build an array from the entries for that model in the currentShipyard TODO
        // 
    }
 
    [gui setArray:[NSArray arrayWithArray:row_info] forRow:GUI_ROW_SHIPYARD_LABELS];
}
- (void) showShipyardInfoForSelection {…}
 
 
- (void) showTradeInInformationFooter
{
    GuiDisplayGen *gui = [UNIVERSE gui];
    OOCreditsQuantity tradeIn = [self tradeInValue];
    OOCreditsQuantity total = tradeIn + credits;
    NSString *shipType = [self displayName];
    
    [gui setColor:[gui colorFromSetting:kGuiShipyardTradeinColor defaultValue:nil] forRow:GUI_ROW_MARKET_CASH - 1];
    [gui setColor:[gui colorFromSetting:kGuiShipyardTradeinColor defaultValue:nil] forRow:GUI_ROW_MARKET_CASH];
    [gui setText:OOExpandKey(@"shipyard-trade-in-value", shipType, tradeIn) forRow: GUI_ROW_MARKET_CASH - 1];
    [gui setText:OOExpandKey(@"shipyard-total-available-with-trade-in", shipType, total, credits, tradeIn) forRow: GUI_ROW_MARKET_CASH];
}
- (void) showTradeInInformationFooter {…}
 
 
- (void) showShipyardModel:(NSString *)shipKey shipData:(NSDictionary *)shipData personality:(uint16_t)personality
{
    if (shipKey == nil || [self dockedStation] == nil)  return;
    [self showShipModelWithKey:shipKey shipData:shipData personality:personality factorX:1.2 factorY:0.8 factorZ:6.4 inContext:@"shipyard"];
}
- (void) showShipyardModel:(NSString *)shipKey shipData:(NSDictionary *)shipData personality:(uint16_t)personality {…}
 
 
- (NSInteger) missingSubEntitiesAdjustment
{
    // each missing subentity depreciates the ship by 5%, up to a maximum of 35% depreciation.
    NSUInteger percent = 5 * ([self maxShipSubEntities] - [[[self shipSubEntityEnumerator] allObjects] count]);
    return (percent > 35 ? 35 : percent);
}
- (NSInteger) missingSubEntitiesAdjustment {…}
 
 
- (OOCreditsQuantity) tradeInValue
{
    // returns down to ship_trade_in_factor% of the full credit value of your ship
    
    /*  FIXME: the trade-in value can be more than the sale value, and
        ship_trade_in_factor starts at 100%, so it can be profitable to sit
        and buy the same ship over and over again. This bug predates Oolite
        1.65.
        Partial fix: make effective trade-in value 75% * ship_trade_in_factor%
        of the "raw" trade-in value. This still allows profitability! A better
        solution would be to unify the price calculation for trade-in and
        for-sale ships.
        -- Ahruman 20070707, fix applied 20070708
    */
    unsigned long long value = [UNIVERSE tradeInValueForCommanderDictionary:[self commanderDataDictionary]];
    value -= value * 0.006 * [self missingSubEntitiesAdjustment];   // TODO: 0.006 might need rethinking.
    value = cunningFee(((value * 75 * ship_trade_in_factor) + 5000) / 10000, 0.005);  // Multiply by two percentages, divide by 100*100. The +5000 is to get normal rounding.
    return value * 10;
}
- (OOCreditsQuantity) tradeInValue {…}
 
 
- (BOOL) buySelectedShip
{
    GuiDisplayGen  *gui = [UNIVERSE gui];
    OOGUIRow        selectedRow = [gui selectedRow];
    
    if (selectedRow <= 0)  return NO;
    
    NSString *key = [gui keyForRow:selectedRow];
 
    if ([key hasPrefix:@"More:"])
    {
        NSInteger fromShip = [[key componentsSeparatedByString:@":"] oo_integerAtIndex:1];
        if (fromShip < 0)  fromShip = 0;
        
        [self setGuiToShipyardScreen:fromShip];
        if ([[UNIVERSE gui] selectedRow] < 0)
        {
            [[UNIVERSE gui] setSelectedRow:GUI_ROW_SHIPYARD_START];
        }
        if (fromShip == 0)
        {
            [[UNIVERSE gui] setSelectedRow:GUI_ROW_SHIPYARD_START + MAX_ROWS_SHIPS_FOR_SALE - 1];
        }
        // next bit or the first ship on the list gets wrongly previewed
        // clean up the display
        NSMutableArray *row_info = [NSMutableArray arrayWithArray:(NSArray*)[gui objectForRow:GUI_ROW_SHIPYARD_LABELS]];
        while ([row_info count] < 4)
        {
            [row_info addObject:@""];
        }
        [row_info replaceObjectAtIndex:2 withObject:@""];
        [row_info replaceObjectAtIndex:3 withObject:@""];
        NSUInteger      i;
        for (i = GUI_ROW_SHIPYARD_INFO_START; i < GUI_ROW_MARKET_CASH - 1; i++)
        {
            [gui setText:@"" forRow:i];
            [gui setColor:[gui colorFromSetting:kGuiShipyardDescriptionColor defaultValue:[OOColor greenColor]] forRow:i];
        }
        [gui setArray:[NSArray arrayWithArray:row_info] forRow:GUI_ROW_SHIPYARD_LABELS];
        [UNIVERSE removeDemoShips];
        return YES;
    }
 
    // first check you can afford it!
    NSDictionary *shipInfo = [currentShipyard oo_dictionaryForKey:key];
    OOCreditsQuantity price = [shipInfo oo_unsignedLongLongForKey:SHIPYARD_KEY_PRICE];
    OOCreditsQuantity tradeIn = [self tradeInValue];
 
    if (credits + tradeIn < price * 10)
        return NO;  // you can't afford it!
    
    // from this point, the player is committed to buying - raise a pre-buy script event
    [self doScriptEvent:OOJSID("playerWillBuyNewShip") 
        withArguments:[NSArray arrayWithObjects:[shipInfo oo_stringForKey:SHIPYARD_KEY_SHIPDATA_KEY], 
            [[[self dockedStation] localShipyard] objectAtIndex:selectedRow - GUI_ROW_SHIPYARD_START], 
            [NSNumber numberWithUnsignedLongLong:price], 
            [NSNumber numberWithUnsignedLongLong:(tradeIn / 10)], nil]];
 
    // sell all the commodities carried
    NSString *good = nil;
    foreach (good, [shipCommodityData goods])
    {
        [self trySellingCommodity:good all:YES];
    }
    // We tried to sell everything. If there are still items present in our inventory, it
    // means that the market got saturated (quantity in station > 127 t) before we could sell
    // it all. Everything that could not be sold will be lost. -- Nikos 20083012
 
    // pay over the mazoolah
    credits -= 10 * price - tradeIn;
    
    NSDictionary *shipDict = [shipInfo oo_dictionaryForKey:SHIPYARD_KEY_SHIP];
    [self newShipCommonSetup:[shipInfo oo_stringForKey:SHIPYARD_KEY_SHIPDATA_KEY] yardInfo:shipInfo baseInfo:shipDict];
 
    // this ship has a clean record
    legalStatus = 0;
 
    NSArray *extras = [shipInfo oo_arrayForKey:KEY_EQUIPMENT_EXTRAS];
    for (NSUInteger i = 0; i < [extras count]; i++)
    {
        NSString *eq_key = [extras oo_stringAtIndex:i];
        if ([eq_key isEqualToString:@"EQ_PASSENGER_BERTH"])
        {
            max_passengers++;
            max_cargo -= PASSENGER_BERTH_SPACE;
        }
        else
        {
            [self addEquipmentItem:eq_key withValidation:YES inContext:@"newShip"]; 
        }
    }
 
    // add bought ship to shipyard_record
    [shipyard_record setObject:[self shipDataKey] forKey:[shipInfo objectForKey:SHIPYARD_KEY_ID]];
    
    // remove the ship from the localShipyard
    [[[self dockedStation] localShipyard] removeObjectAtIndex:selectedRow - GUI_ROW_SHIPYARD_START];
    
    // perform the transformation
    NSDictionary* cmdr_dict = [self commanderDataDictionary];    // gather up all the info
    if (![self setCommanderDataFromDictionary:cmdr_dict])  return NO;
 
    [self setStatus:STATUS_DOCKED];
    [self setEntityPersonalityInt:[shipInfo oo_unsignedShortForKey:SHIPYARD_KEY_PERSONALITY]];
    
    // adjust the clock forward by an hour
    ship_clock_adjust += 3600.0;
    
    // finally we can get full hock if we sell it back
    ship_trade_in_factor = 100;
    
    if ([UNIVERSE autoSave])  [UNIVERSE setAutoSaveNow:YES];
    
    return YES;
}
- (BOOL) buySelectedShip {…}
 
- (BOOL) replaceShipWithNamedShip:(NSString *)shipKey
{
 
    NSDictionary *ship_info = [[OOShipRegistry sharedRegistry] shipyardInfoForKey:shipKey];
    
    NSDictionary *ship_base_dict = [[OOShipRegistry sharedRegistry] shipInfoForKey:shipKey];
 
    if (ship_info == nil || ship_base_dict == nil) {
        return NO;
    }
 
    // from this point, the player is committed to replacing - raise a pre-replace script event
    [self doScriptEvent:OOJSID("playerWillReplaceShip") withArgument:shipKey];
 
    [self newShipCommonSetup:shipKey yardInfo:ship_info baseInfo:ship_base_dict];
 
    // perform the transformation
    NSDictionary* cmdr_dict = [self commanderDataDictionary];    // gather up all the info
    if (![self setCommanderDataFromDictionary:cmdr_dict])  return NO;
 
    // refill from ship_info
    NSArray* extras = [NSMutableArray arrayWithArray:[[ship_info oo_dictionaryForKey:KEY_STANDARD_EQUIPMENT] oo_arrayForKey:KEY_EQUIPMENT_EXTRAS]];
    for (unsigned i = 0; i < [extras count]; i++)
    {
        NSString* eq_key = [extras oo_stringAtIndex:i];
        if ([eq_key isEqualToString:@"EQ_PASSENGER_BERTH"])
        {
            max_passengers++;
            max_cargo -= PASSENGER_BERTH_SPACE;
        }
        else
        {
            [self addEquipmentItem:eq_key withValidation:YES inContext:@"newShip"]; 
        }
    }
 
    [self setEntityPersonalityInt:[ship_info oo_unsignedShortForKey:SHIPYARD_KEY_PERSONALITY]];
    
    return YES;
}
- (BOOL) replaceShipWithNamedShip:(NSString *)shipKey {…}
 
- (void) newShipCommonSetup:(NSString *)shipKey yardInfo:(NSDictionary *)ship_info baseInfo:(NSDictionary *)ship_base_dict 
{
    // Zero out our manifest.
    [shipCommodityData removeAllGoods];
    current_cargo = 0;
    
    // drop all passengers
    [passengers removeAllObjects];
    [passenger_record removeAllObjects]; 
        
    // parcels stay the same; easy to transfer between ships
    // contracts stay the same, so if you default - tough!
    // okay we need to switch the model used, lots of the stats, and add all the extras
    
    [self clearSubEntities];
 
    [self setShipDataKey:shipKey];
 
    NSDictionary *shipDict = ship_base_dict;
 
 
    // get a full tank for free
    [self setFuel:[self fuelCapacity]];
    
    // get forward_weapon aft_weapon port_weapon starboard_weapon from ship_info
    int base_facings = [shipDict oo_unsignedIntForKey:KEY_WEAPON_FACINGS defaultValue:15];
    int available_facings = [ship_info oo_unsignedIntForKey:KEY_WEAPON_FACINGS defaultValue:base_facings];
 
    // not retained - weapon types are references to the objects in OOEquipmentType's cache
    if (available_facings & WEAPON_FACING_AFT)
        aft_weapon_type = OOWeaponTypeFromEquipmentIdentifierSloppy([shipDict oo_stringForKey:@"aft_weapon_type"]);
    else
        aft_weapon_type = OOWeaponTypeFromEquipmentIdentifierSloppy(@"EQ_WEAPON_NONE");
 
    if (available_facings & WEAPON_FACING_PORT)
        port_weapon_type = OOWeaponTypeFromEquipmentIdentifierSloppy([shipDict oo_stringForKey:@"port_weapon_type"]);
    else
        port_weapon_type = OOWeaponTypeFromEquipmentIdentifierSloppy(@"EQ_WEAPON_NONE");
 
    if (available_facings & WEAPON_FACING_STARBOARD)
        starboard_weapon_type = OOWeaponTypeFromEquipmentIdentifierSloppy([shipDict oo_stringForKey:@"starboard_weapon_type"]);
    else
        starboard_weapon_type = OOWeaponTypeFromEquipmentIdentifierSloppy(@"EQ_WEAPON_NONE");
 
    if (available_facings & WEAPON_FACING_FORWARD)
        forward_weapon_type = OOWeaponTypeFromEquipmentIdentifierSloppy([shipDict oo_stringForKey:@"forward_weapon_type"]);
    else
        forward_weapon_type = OOWeaponTypeFromEquipmentIdentifierSloppy(@"EQ_WEAPON_NONE");
    
    // new ships start with weapons online
    weapons_online = 1;
 
    // get basic max_cargo
    max_cargo = [UNIVERSE maxCargoForShip:[self shipDataKey]];
 
    // ensure all missiles are tidied up and start at pylon 0
    [self tidyMissilePylons];
 
    // get missiles from ship_info
    missiles = [shipDict oo_unsignedIntForKey:@"missiles"];
    
    // reset max_passengers
    max_passengers = 0;
    
    // reset and refill extra_equipment then set flags from it
    
    // keep track of portable equipment..
 
    NSMutableSet    *portable_equipment = [NSMutableSet set];
    NSEnumerator    *eqEnum = nil;
    NSString        *eq_desc = nil;
    OOEquipmentType  *item = nil;
    
    for (eqEnum = [self equipmentEnumerator]; (eq_desc = [eqEnum nextObject]);)
    {
        item = [OOEquipmentType equipmentTypeWithIdentifier:eq_desc];
        if ([item isPortableBetweenShips])  [portable_equipment addObject:eq_desc];
    }
    
    // remove ALL
    [self removeAllEquipment];
    
    // restore  portable equipment
    for (eqEnum = [portable_equipment objectEnumerator]; (eq_desc = [eqEnum nextObject]); )
    {
        [self addEquipmentItem:eq_desc withValidation:NO inContext:@"portable"];
    }
 
 
    // set up subentities from scratch; new ship could carry more or fewer than the old one
    [self setUpSubEntities];
 
    // clear old ship names
    [self setShipClassName:[shipDict oo_stringForKey:@"name"]];
    [self setShipUniqueName:@""];
 
    // new ship, so lose some memory of actions
    // new ship, so lose some memory of player actions
    if (ship_kills >= 6400)
    {
        [self clearRolesFromPlayer:0.1];
    }
    else if (ship_kills >= 2560)
    {
        [self clearRolesFromPlayer:0.25];
    }
    else
    {
        [self clearRolesFromPlayer:0.5];
    }   
 
}
- (void) newShipCommonSetup:(NSString *)shipKey yardInfo:(NSDictionary *)ship_info baseInfo:(NSDictionary *)ship_base_dict  {…}
 
@end
 
static unsigned RepForRisk(unsigned risk)
{
    switch (risk)
    {
    case 0:
        return 1;
    case 1:
        return 2;
    case 2:
    default:
        return 4;
    }
}
static unsigned RepForRisk(unsigned risk) {…}