Sample: WebScriptObject ( Javascript associative array ) to NSDictionary ( WebScriptObject ( Javascript array ) to NSArray )

Addtion(20111029T2300): Nest Version

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SampleAppDelegate.h

#import <Cocoa/Cocoa.h>
#import <WebKit/WebKit.h>
@interface SampleAppDelegate : NSObject <NSApplicationDelegate> {
    NSWindow *window;
}

@property (assign) IBOutlet NSWindow *window;

@end

SampleAppDelegate.m

#import "SampleAppDelegate.h"
@implementation SampleAppDelegate
@synthesize window;
+ (NSArray *)arrayWithWebScriptObject:(WebScriptObject *)obj
{    
    NSMutableArray *ret = [NSMutableArray array];
    NSUInteger count = [[obj valueForKey:@"length"] integerValue]; //exception occurs if it is associative array.
    unsigned i;
    for (i = 0; i < count; i++) {
        [ret addObject:[obj webScriptValueAtIndex:i]];
    }
    return [[ret retain] autorelease];
}
+ (NSDictionary *)dictionaryWithWebScriptObject:(WebScriptObject *)obj
                                webScriptObject:(WebScriptObject *)scriptObj
{
    NSMutableDictionary *ret= [NSMutableDictionary dictionary];
    id keys= [scriptObj callWebScriptMethod:@"_f0_"
                              withArguments:[NSArray arrayWithObjects:obj, nil]];
    NSArray *keyAry= [SampleAppDelegate arrayWithWebScriptObject:keys];
    unsigned i;
    for(i= 0; i<[keyAry count]; i++) {
        NSString *key= [keyAry objectAtIndex:i]; 
        [ret setObject:[obj valueForKey:key] forKey:key];
    }
    return [[ret retain] autorelease];
}
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    WebView *webView = [[WebView alloc] init];
    [[webView mainFrame] loadHTMLString:@"" baseURL:NULL];
    WebScriptObject *scriptObject = [webView windowScriptObject];

    NSString *_f0_= @"function _f0_(hash){var ret=[];for(var key in hash){ret.push(key);}return ret;}";
    NSString *code= @"function main(){return {'key0':'val0', 'key1':'val1'};}";
    NSString *script = [NSString stringWithFormat:@"try { %@ %@ } catch (e) { e.toString() }", code, _f0_];
    id ret0= [scriptObject evaluateWebScript:script];
    if (![ret0 isMemberOfClass:[WebUndefined class]]) {
        NSLog(@"ret(main): %@", ret0);
    }
    
    id ret= [scriptObject callWebScriptMethod:@"main" withArguments:nil];
    if (ret && [ret isMemberOfClass:[WebScriptObject class]]) {
        WebScriptObject *obj= (WebScriptObject *)ret;
        NSDictionary *dict= [SampleAppDelegate dictionaryWithWebScriptObject:obj
                                                             webScriptObject:scriptObject];
        NSLog(@"%@", dict);
    }
}
@end

reference: "Notes on Cocoa - Convert a Javascript array to an NSArray"