//
//  gzXMLParcer.m
//  Minfo
//
//  Created by Nguyen Hieu on 1/21/13.
//  Copyright (c) 2013 Nguyen Hieu. All rights reserved.
//

#import "gzXMLParcer.h"
NSString *const kXMLReaderTextNodeKey = @"text";
@implementation gzXMLParcer

-(NSMutableDictionary *)GetDictionaryFromXMLdata:(NSData*)dataXML
{
    
    dictionaryStack = [[NSMutableArray alloc] init];
    textInProgress = [[NSMutableString alloc] init];
    
    // Initialize the stack with a fresh dictionary
    [dictionaryStack addObject:[NSMutableDictionary dictionary]];
    
    
    NSXMLParser *parser = [[NSXMLParser alloc] initWithData:dataXML];
    parser.delegate = self;
    BOOL success = [parser parse];

    if (success)
    {

        NSMutableDictionary *resultDict = [dictionaryStack objectAtIndex:0];
        return resultDict;
    }
    
    return nil;
}
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
    // Get the dictionary for the current level in the stack

    
    NSMutableDictionary *parentDict = [dictionaryStack lastObject];
    
    // Create the child dictionary for the new element, and initilaize it with the attributes
    NSMutableDictionary *childDict = [NSMutableDictionary dictionary];
    [childDict addEntriesFromDictionary:attributeDict];
    
    // If there’s already an item for this key, it means we need to create an array
    id existingValue = [parentDict objectForKey:elementName];
    if (existingValue)
    {
        NSMutableArray *array = nil;
        if ([existingValue isKindOfClass:[NSMutableArray class]])
        {
            // The array exists, so use it
            array = (NSMutableArray *) existingValue;
        }
        else
        {
            // Create an array if it doesn’t exist
            array = [NSMutableArray array];
            [array addObject:existingValue];
            
            // Replace the child dictionary with an array of children dictionaries
            [parentDict setObject:array forKey:elementName];
        }
        
        // Add the new child dictionary to the array
        [array addObject:childDict];
    }
    else
    {
        // No existing value, so update the dictionary
        [parentDict setObject:childDict forKey:elementName];
    }
    
    // Update the stack
    [dictionaryStack addObject:childDict];
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    // Update the parent dict with text info
    NSMutableDictionary *dictInProgress = [dictionaryStack lastObject];
    
    // Set the text property
    if ([textInProgress length] > 0)
    {
        // Get rid of leading + trailing whitespace
        [dictInProgress setObject:textInProgress forKey:kXMLReaderTextNodeKey];
        
        // Reset the text
        [textInProgress release];
        textInProgress = [[NSMutableString alloc] init];
    }
    
    // Pop the current dict
    [dictionaryStack removeLastObject];
}

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    // Build the text value
    
    [textInProgress appendString:string];

}


@end
