cog/Playlist/PlaylistLoader.m

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//
// PlaylistLoader.m
// Cog
//
// Created by Vincent Spader on 3/05/07.
// Copyright 2007 Vincent Spader All rights reserved.
//
#import "PlaylistLoader.h"
#import "PlaylistController.h"
#import "PlaylistEntry.h"
#import "NSFileHandle+CreateFile.h"
#import "CogAudio/AudioPlayer.h"
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@implementation PlaylistLoader
//load/save playlist auto-determines type to be either pls or m3u.
- (BOOL)load:(NSString *)filename
{
NSString *ext = [filename pathExtension];
if ([ext isEqualToString:@"m3u"])
{
return [self loadM3u:filename];
}
else if ([ext isEqualToString:@"pls"])
{
return [self loadPls:filename];
}
else
{
return [self loadPls:filename] || [self loadM3u:filename];
}
}
- (BOOL)save
{
return [self save:currentFile asType:currentType];
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}
- (BOOL)save:(NSString *)filename
{
NSString *ext = [filename pathExtension];
if ([ext isEqualToString:@"pls"])
{
return [self save:filename asType:kPlaylistPls];
}
else
{
return [self save:filename asType:kPlaylistM3u];
}
}
- (BOOL)save:(NSString *)filename asType:(PlaylistType)type
{
if (type == kPlaylistM3u)
{
return [self saveM3u:filename];
}
else if (type == kPlaylistPls)
{
return [self savePls:filename];
}
return NO;
}
- (NSString *)relativePathFrom:(NSString *)filename toURL:(NSURL *)entryURL
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{
NSString *basePath = [[[filename stringByStandardizingPath] stringByDeletingLastPathComponent] stringByAppendingString:@"/"];
if ([entryURL isFileURL]) {
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//We want relative paths.
NSMutableString *entryPath = [[[[entryURL path] stringByStandardizingPath] mutableCopy] autorelease];
[entryPath replaceOccurrencesOfString:basePath withString:@"" options:(NSAnchoredSearch | NSLiteralSearch | NSCaseInsensitiveSearch) range:NSMakeRange(0, [entryPath length])];
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return entryPath;
}
else {
//Write [entryURL absoluteString] to file
return [entryURL absoluteString];
}
}
- (NSURL *)urlForPath:(NSString *)path relativeTo:(NSString *)baseFilename
{
if ([path hasPrefix:@"/"]) {
return [NSURL fileURLWithPath:path];
}
NSEnumerator *e = [[AudioPlayer schemes] objectEnumerator];
NSString *scheme;
while (scheme = [e nextObject])
{
if ([path hasPrefix:[scheme stringByAppendingString:@"://"]])
{
return [NSURL URLWithString:path];
}
}
NSString *basePath = [[[baseFilename stringByStandardizingPath] stringByDeletingLastPathComponent] stringByAppendingString:@"/"];
return [NSURL fileURLWithPath:[basePath stringByAppendingString:path]];
}
- (BOOL)loadM3u:(NSString *)filename
{
NSLog(@"Loading playlist: %@", filename);
NSError *error = nil;
NSString *contents = [NSString stringWithContentsOfFile:filename encoding:NSUTF8StringEncoding error:&error];
if (error || !contents) {
NSLog(@"Could not open file...%@ %@", contents, error);
return NO;
}
NSString *entry;
NSEnumerator *e = [[contents componentsSeparatedByString:@"\n"] objectEnumerator];
NSMutableArray *entries = [NSMutableArray array];
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while (entry = [[e nextObject] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]])
{
if ([entry hasPrefix:@"#"] || [entry isEqualToString:@""]) //Ignore extra info
continue;
//Need to add basePath, and convert to URL
[entries addObject:[self urlForPath:entry relativeTo:filename]];
}
[self addURLs:entries sort:NO];
return YES;
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}
- (BOOL)saveM3u:(NSString *)filename
{
NSFileHandle *fileHandle = [NSFileHandle fileHandleForWritingAtPath:filename createFile:YES];
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if (!fileHandle) {
NSLog(@"Error!");
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return NO;
}
[fileHandle truncateFileAtOffset:0];
NSLog(@"Saving: %@", filename);
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PlaylistEntry *pe;
NSEnumerator *e = [[playlistController content] objectEnumerator];
while (pe = [e nextObject])
{
NSString *path = [self relativePathFrom:filename toURL:[pe url]];
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[fileHandle writeData:[[path stringByAppendingString:@"\n"] dataUsingEncoding:NSUTF8StringEncoding]];
}
[fileHandle closeFile];
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[self setCurrentFile:filename];
[self setCurrentType:kPlaylistM3u];
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return YES;
}
- (BOOL)loadPls:(NSString *)filename
{
NSError *error;
NSString *contents = [NSString stringWithContentsOfFile:filename encoding:NSUTF8StringEncoding error:&error];
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if (error || !contents) {
return NO;
}
NSString *entry;
NSEnumerator *e = [[contents componentsSeparatedByString:@"\n"] objectEnumerator];
NSMutableArray *entries = [NSMutableArray array];
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while (entry = [[e nextObject] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]])
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{
NSScanner *scanner = [[NSScanner alloc] initWithString:entry];
NSString *lhs = nil;
NSString *rhs = nil;
if (![scanner scanUpToString:@"=" intoString:&lhs] || // get LHS
![scanner scanString:@"=" intoString:nil] || // skip the =
![scanner scanUpToString:@"" intoString:&rhs] || // get RHS
![lhs isEqualToString:@"File"]) // We only want file entries
{
[scanner release];
continue;
}
//need to add basepath if its a file, and convert to URL
[entries addObject:[self urlForPath:rhs relativeTo:filename]];
[scanner release];
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}
[self addURLs:entries sort:NO];
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return YES;
}
- (BOOL)savePls:(NSString *)filename
{
NSFileHandle *fileHandle = [NSFileHandle fileHandleForWritingAtPath:filename createFile:YES];
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if (!fileHandle) {
return NO;
}
[fileHandle truncateFileAtOffset:0];
[fileHandle writeData:[[NSString stringWithFormat:@"[playlist]\nnumberOfEntries=%i\n\n",[[playlistController content] count]] dataUsingEncoding:NSUTF8StringEncoding]];
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NSEnumerator *e = [[playlistController content] objectEnumerator];
PlaylistEntry *pe;
int i = 1;
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while (pe = [e nextObject])
{
NSString *path = [self relativePathFrom:filename toURL:[pe url]];
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NSString *entry = [NSString stringWithFormat:@"File%i=%@\n",i,path];
[fileHandle writeData:[entry dataUsingEncoding:NSUTF8StringEncoding]];
i++;
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}
[fileHandle writeData:[@"\nVERSION=2" dataUsingEncoding:NSUTF8StringEncoding]];
[fileHandle closeFile];
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[self setCurrentFile:filename];
[self setCurrentType:kPlaylistM3u];
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return YES;
}
- (NSArray *)fileURLsAtPath:(NSString *)path
{
NSFileManager *manager = [NSFileManager defaultManager];
NSMutableArray *urls = [NSMutableArray array];
NSString *subpath;
NSArray *subpaths = [manager subpathsAtPath:path];
NSEnumerator *e = [subpaths objectEnumerator];
while(subpath = [e nextObject])
{
NSString *absoluteSubpath = [NSString pathWithComponents:[NSArray arrayWithObjects:path,subpath,nil]];
BOOL isDir;
if ( [manager fileExistsAtPath:absoluteSubpath isDirectory:&isDir] && isDir == NO)
{
[urls addObject:[NSURL fileURLWithPath:absoluteSubpath]];
}
}
return urls;
}
- (void)insertURLs:(NSArray *)urls atIndex:(int)index sort:(BOOL)sort
{
NSMutableArray *allURLs = [[NSMutableArray alloc] init];
NSMutableArray *validURLs = [[NSMutableArray alloc] init];
NSArray *finalURLs;
if (!urls)
return;
if (index < 0)
index = 0;
NSLog(@"URLS: %@", urls);
NSEnumerator *urlEnumerator = [urls objectEnumerator];
NSURL *url;
while (url = [urlEnumerator nextObject])
{
if ([url isFileURL]) {
BOOL isDir;
if ([[NSFileManager defaultManager] fileExistsAtPath:[url path] isDirectory:&isDir])
{
if (isDir == YES)
{
//Get subpaths
[allURLs addObjectsFromArray:[self fileURLsAtPath:[url path]]];
}
else
{
//File url
[allURLs addObject:url];
}
}
}
else
{
//Non-file URL..
[allURLs addObject:url];
}
}
urlEnumerator = [allURLs objectEnumerator];
while (url = [urlEnumerator nextObject])
{
if (![[AudioPlayer schemes] containsObject:[url scheme]])
continue;
//Need a better way to determine acceptable file types than basing it on extensions.
if (![[self acceptableFileTypes] containsObject:[[[url path] pathExtension] lowercaseString]])
continue;
[validURLs addObject:url];
}
finalURLs = validURLs;
if (sort == YES)
{
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"absoluteString" ascending:YES];
finalURLs = [validURLs sortedArrayUsingDescriptors:[NSArray arrayWithObject:sortDescriptor]];
[sortDescriptor release];
}
//Create actual entries
int i;
NSMutableArray *entries = [NSMutableArray array];
for (i = 0; i < [finalURLs count]; i++)
{
PlaylistEntry *pe = [[PlaylistEntry alloc] init];
NSURL *url = [finalURLs objectAtIndex:i];
[pe setURL:url];
[pe setIndex:[NSNumber numberWithInt:(index+i)]];
[pe setTitle:[[url path] lastPathComponent]];
[entries addObject:pe];
[pe release];
}
NSIndexSet *is = [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(index, [entries count])];
[playlistController insertObjects:entries atArrangedObjectIndexes:is];
//Select the first entry in the group that was just added
[playlistController setSelectionIndex:index];
//Other thread for reading things...
[NSThread detachNewThreadSelector:@selector(readEntriesInfoThread:) toTarget:self withObject:entries];
[allURLs release];
[validURLs release];
return;
}
- (void)readEntriesInfoThread:(NSArray *)entries
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSEnumerator *e = [entries objectEnumerator];
PlaylistEntry *pe;
while (pe = [e nextObject])
{
[pe readPropertiesThread];
[pe readMetadataThread];
//Hack so the display gets updated
if (pe == [playlistController currentEntry])
[playlistController performSelectorOnMainThread:@selector(setCurrentEntry:) withObject:[playlistController currentEntry] waitUntilDone:YES];
}
[playlistController performSelectorOnMainThread:@selector(updateTotalTime) withObject:nil waitUntilDone:NO];
[pool release];
}
- (void)addURLs:(NSArray *)urls sort:(BOOL)sort
{
[self insertURLs:urls atIndex:[[playlistController content] count] sort:sort];
}
- (NSArray *)acceptableFileTypes
{
return [AudioPlayer fileTypes];
}
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- (NSArray *)acceptablePlaylistTypes
{
return [NSArray arrayWithObjects:@"m3u",@"pls",nil];
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}
- (PlaylistType)currentType
{
return currentType;
}
- (void)setCurrentType:(PlaylistType)type
{
currentType = type;
}
- (NSString *)currentFile
{
return currentFile;
}
- (void)setCurrentFile:(NSString *)file
{
[file retain];
[currentFile release];
currentFile = file;
}
@end