/*

 File: ZipEntry.m

 Abstract: ZipEntry is the model class representing a single entry in the zip archive.

 Version: 1.1

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 */ 

#import "ZipEntry.h"

@implementation ZipEntry

+ (ZipEntry *)rootEntry {

    return [[self alloc] initWithPath:@"/" headerOffset:0 CRC:0 compressedSize:0 uncompressedSize:0 compressionType:0];

}

- (id)initWithPath:(NSString *)path headerOffset:(unsigned)headeridx CRC:(unsigned)crcval compressedSize:(unsigned)csize uncompressedSize:(unsigned)usize compressionType:(unsigned)compression {

    self = [super init];

    if (self) {

        isLeaf = ([path hasSuffix:@"/"] && compressedSize == 0) ? NO : YES;

        path = [@"/" stringByAppendingPathComponent:path];

        name = [[path lastPathComponent] copy];

        leadingPath = [[path stringByDeletingLastPathComponent] copy];

        if (!isLeaf) childEntries = [[NSMutableArray alloc] init];

        headerOffset = headeridx;

        CRC = crcval;

        compressedSize = csize;

        uncompressedSize = usize;

        compressionType = compression;

    }

    return self;

}

- (NSString *)path {

    NSString *path = [leadingPath stringByAppendingPathComponent:name];

    return isLeaf ? path : [path stringByAppendingString:@"/"];

}

- (NSArray *)childEntries {

    return childEntries;

}

@synthesize name;

@synthesize headerOffset;

@synthesize CRC;

@synthesize compressedSize;

@synthesize uncompressedSize;

@synthesize compressionType;

@synthesize isLeaf;

- (NSComparisonResult)compare:(ZipEntry *)other {

    return [[self name] localizedCaseInsensitiveCompare:[other name]];

}

- (BOOL)addChildEntry:(ZipEntry *)entry {

    if (!childEntries) return NO;

    [childEntries addObject:entry];

    [childEntries sortUsingSelector:@selector(compare:)];

    return YES;

}

- (ZipEntry *)childDirectoryEntryWithName:(NSString *)str createIfNotPresent:(BOOL)flag {

    ZipEntry *childEntry = nil;

    for (ZipEntry *entry in childEntries) {

        if ([[entry name] isEqualToString:str] && ![entry isLeaf]) {

            childEntry = (ZipEntry *)entry;

            break;

        }

    }

    if (!childEntry && flag && !isLeaf) {

        childEntry = [[ZipEntry alloc] initWithPath:[[[self path] stringByAppendingPathComponent:str] stringByAppendingString:@"/"] headerOffset:0 CRC:0 compressedSize:0 uncompressedSize:0 compressionType:0];

        [self addChildEntry:childEntry];

    }

    return childEntry;

}

- (BOOL)addToRootEntry:(ZipEntry *)rootEntry {

    ZipEntry *directoryEntry = rootEntry;

    NSArray *components = [leadingPath pathComponents];

    for (NSString *component in components) {

        if (![@"/" isEqualToString:component]) directoryEntry = [directoryEntry childDirectoryEntryWithName:component createIfNotPresent:YES];

    }

    return directoryEntry ? [directoryEntry addChildEntry:self] : NO;

}

@end