OOScript.m

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/*
 
OOScript.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 "OOScript.h"
#import "OOJSScript.h"
#import "OOPListScript.h"
#import "OOLogging.h"
#import "Universe.h"
#import "OOJavaScriptEngine.h"
#import "OOPListParsing.h"
#import "ResourceManager.h"
#import "OODebugStandards.h"
 
 
static NSString * const kOOLogLoadScriptJavaScript          = @"script.load.javaScript";
static NSString * const kOOLogLoadScriptPList               = @"script.load.pList";
static NSString * const kOOLogLoadScriptOK                  = @"script.load.parseOK";
static NSString * const kOOLogLoadScriptParseError          = @"script.load.parseError";
static NSString * const kOOLogLoadScriptNone                = @"script.load.none";
 
 
@implementation OOScript
 
+ (NSArray *)worldScriptsAtPath:(NSString *)path
{
    NSFileManager       *fmgr = nil;
    NSString            *filePath = nil;
    NSArray             *names = nil;
    NSArray             *result = nil;
    id                  script = nil;
    BOOL                foundScript = NO;
    
    fmgr = [NSFileManager defaultManager];
    
    // First, look for world-scripts.plist.
    filePath = [path stringByAppendingPathComponent:@"world-scripts.plist"];
    if (filePath != nil)
    {
        names = OOArrayFromFile(filePath);
        if (names != nil)
        {
            foundScript = YES;
            result = [self scriptsFromList:names];
        }
    }
    
    // Second, try to load a JavaScript.
    if (result == nil)
    {
        filePath = [path stringByAppendingPathComponent:@"script.js"];
        if ([fmgr oo_oxzFileExistsAtPath:filePath]) foundScript = YES;
        else
        {
            filePath = [path stringByAppendingPathComponent:@"script.es"];
            if ([fmgr oo_oxzFileExistsAtPath:filePath]) foundScript = YES;
        }
        if (foundScript)
        {
            OOLog(kOOLogLoadScriptJavaScript, @"Trying to load JavaScript script %@", filePath);
            OOLogIndentIf(kOOLogLoadScriptJavaScript);
            
            script = [OOJSScript scriptWithPath:filePath properties:nil];
            if (script != nil)
            {
                result = [NSArray arrayWithObject:script];
                OOLog(kOOLogLoadScriptOK, @"Successfully loaded JavaScript script %@", filePath);
            }
            else  OOLogERR(kOOLogLoadScriptParseError, @"Failed to load JavaScript script %@", filePath);
            
            OOLogOutdentIf(kOOLogLoadScriptJavaScript);
        }
    }
    
    // Third, try to load a plist script.
    if (result == nil)
    {
        filePath = [path stringByAppendingPathComponent:@"script.plist"];
        if ([fmgr oo_oxzFileExistsAtPath:filePath])
        {
            OOStandardsDeprecated([NSString stringWithFormat:@"Legacy script %@ is deprecated",filePath]);
            if (!OOEnforceStandards())
            {
                foundScript = YES;
                OOLog(kOOLogLoadScriptPList, @"Trying to load property list script %@", filePath);
                OOLogIndentIf(kOOLogLoadScriptPList);
                
                result = [OOPListScript scriptsInPListFile:filePath];
                if (result != nil)  OOLog(kOOLogLoadScriptOK, @"Successfully loaded property list script %@", filePath);
                else  OOLogERR(kOOLogLoadScriptParseError, @"Failed to load property list script %@", filePath);
            
                OOLogOutdentIf(kOOLogLoadScriptPList);
            }
        }
    }
    
    if (result == nil && foundScript)
    {
        OOLog(kOOLogLoadScriptNone, @"No script could be loaded from %@", path);
    }
    
    return result;
}
 
 
+ (NSArray *)scriptsFromFileNamed:(NSString *)fileName
{
    NSArray *result = nil;
    NSString *path = [ResourceManager pathForFileNamed:fileName inFolder:@"Scripts"];
    if (path != nil)
    {
        result = [self scriptsFromFileAtPath:path];
    }
    
    if (result == nil)
    {
        OOLogERR(@"script.load.notFound", @"Could not find script file %@.", fileName);
    }
    
    return result;
}
 
 
+ (NSArray *)scriptsFromList:(NSArray *)fileNames
{
    NSEnumerator        *nameEnum = nil;
    NSString            *name = nil;
    NSMutableArray      *result = nil;
    NSArray             *scripts = nil;
    
    result = [NSMutableArray arrayWithCapacity:[fileNames count]];
    
    for (nameEnum = [fileNames objectEnumerator]; (name = [nameEnum nextObject]); )
    {
        scripts = [self scriptsFromFileNamed:name];
        if (scripts != nil)  [result addObjectsFromArray:scripts];
    }
    
    return result;
}
 
 
+ (NSArray *)scriptsFromFileAtPath:(NSString *)filePath
{
    // oo_oxzFile always returns false for directories
    if (![[NSFileManager defaultManager] oo_oxzFileExistsAtPath:filePath]) return nil;
    
    NSString *extension = [[filePath pathExtension] lowercaseString];
    
    if ([extension isEqualToString:@"js"] || [extension isEqualToString:@"es"])
    {
        NSArray     *result = nil;
        OOScript    *script = [OOJSScript scriptWithPath:filePath properties:nil];
        if (script != nil) result = [NSArray arrayWithObject:script];
        return result;
    }
    else if ([extension isEqualToString:@"plist"])
    {
        OOStandardsDeprecated([NSString stringWithFormat:@"Legacy script %@ is deprecated",filePath]);
        if (OOEnforceStandards())
        {
            return nil;
        }
        return [OOPListScript scriptsInPListFile:filePath];
    }
    
    OOLogERR(@"script.load.badName", @"Don't know how to load a script from %@.", filePath);
    return nil;
}
 
 
+ (id)jsScriptFromFileNamed:(NSString *)fileName properties:(NSDictionary *)properties
{
    NSString            *extension = nil;
    NSString            *path = nil;
    
    if ([fileName length] == 0)  return nil;
    
    extension = [[fileName pathExtension] lowercaseString];
    if ([extension isEqualToString:@"js"] || [extension isEqualToString:@"es"])
    {
        path = [ResourceManager pathForFileNamed:fileName inFolder:@"Scripts"];
        if (path == nil)
        {
            OOLogERR(@"script.load.notFound", @"Could not find script file %@.", fileName);
            return nil;
        }
        return [OOJSScript scriptWithPath:path properties:properties];
    }
    else if ([extension isEqualToString:@"plist"])
    {
        OOLogERR(@"script.load.badName", @"Can't load script named %@ - legacy scripts are not supported in this context.", fileName);
        return nil;
    }
    
    OOLogERR(@"script.load.badName", @"Don't know how to load a script from %@.", fileName);
    return nil;
}
 
 
+ (id)jsAIScriptFromFileNamed:(NSString *)fileName properties:(NSDictionary *)properties
{
    NSString            *extension = nil;
    NSString            *path = nil;
    
    if ([fileName length] == 0)  return nil;
    
    extension = [[fileName pathExtension] lowercaseString];
    if ([extension isEqualToString:@"js"] || [extension isEqualToString:@"es"])
    {
        path = [ResourceManager pathForFileNamed:fileName inFolder:@"AIs"];
        if (path == nil)
        {
            OOLogERR(@"script.load.notFound", @"Could not find script file %@.", fileName);
            return nil;
        }
        return [OOJSScript scriptWithPath:path properties:properties];
    }
    else if ([extension isEqualToString:@"plist"])
    {
        OOLogERR(@"script.load.badName", @"Can't load script named %@ - legacy scripts are not supported in this context.", fileName);
        return nil;
    }
    
    OOLogERR(@"script.load.badName", @"Don't know how to load a script from %@.", fileName);
    return nil;
}
 
 
- (NSString *)descriptionComponents
{
    return [NSString stringWithFormat:@"\"%@\" version %@", [self name], [self version]];
}
 
 
- (NSString *)name
{
    OOLogERR(kOOLogSubclassResponsibility, @"%@", @"OOScript should not be used directly!");
    return nil;
}
 
 
- (NSString *)scriptDescription
{
    OOLogERR(kOOLogSubclassResponsibility, @"%@", @"OOScript should not be used directly!");
    return nil;
}
 
 
- (NSString *)version
{
    OOLogERR(kOOLogSubclassResponsibility, @"%@", @"OOScript should not be used directly!");
    return nil;
}
 
 
- (NSString *)displayName
{
    NSString *name = [self name];
    NSString *version = [self version];
    
    if (version != nil)  return [NSString stringWithFormat:@"%@ %@", name, version];
    else if (name != nil)  return [NSString stringWithFormat:@"%@", name];
    else  return nil;
}
 
 
- (BOOL) requiresTickle
{
    return NO;
}
 
 
- (void)runWithTarget:(Entity *)target
{
    OOLogERR(kOOLogSubclassResponsibility, @"%@", @"OOScript should not be used directly!");
}
 
@end