94 lines
3.1 KiB
Objective-C
94 lines
3.1 KiB
Objective-C
//
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// SpotlightPlaylistEntry.m
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// Cog
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//
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// Created by Matthew Grinshpun on 11/02/08.
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// Copyright 2008 Matthew Leon Grinshpun. All rights reserved.
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//
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#import "SpotlightPlaylistEntry.h"
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// dictionary that lets us translate from and mdKey to an entryKey
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// if we need the help of a transformer, we use an nsarray
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// with format (entryKey, transformerName)
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static NSDictionary *importKeys;
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@implementation SpotlightPlaylistEntry
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+ (void)initialize
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{
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// We need to translate the path string to a full URL
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NSArray *URLTransform =
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[NSArray arrayWithObjects:@"URL", @"PathToURLTransformer", nil];
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// Extract the artist name from the authors array
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NSArray *artistTransform =
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[NSArray arrayWithObjects:@"artist", @"AuthorToArtistTransformer", nil];
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// Track numbers must sometimes be converted from NSNumber to NSString
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NSArray *trackTransform =
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[NSArray arrayWithObjects:@"spotlightTrack", @"NumberToStringTransformer", nil];
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importKeys = [NSDictionary dictionaryWithObjectsAndKeys:
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@"title", @"kMDItemTitle",
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@"album", @"kMDItemAlbum",
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trackTransform, @"kMDItemAudioTrackNumber",
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@"year", @"kMDItemRecordingYear",
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@"genre", @"kMDItemMusicalGenre",
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@"length", @"kMDItemDurationSeconds",
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URLTransform, @"kMDItemPath",
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artistTransform, @"kMDItemAuthors",
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nil];
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}
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+ (SpotlightPlaylistEntry *)playlistEntryWithMetadataItem:(NSMetadataItem *)metadataItem
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{
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SpotlightPlaylistEntry *entry = [[SpotlightPlaylistEntry alloc]init];
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// loop through the keys we want to extract
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for (NSString *mdKey in importKeys) {
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id importTarget = [importKeys objectForKey:mdKey];
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// Just copy the object from metadata
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if ([importTarget isKindOfClass:[NSString class]])
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{
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[entry setValue: [metadataItem valueForAttribute:mdKey]
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forKey: importTarget];
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}
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// Transform the value in metadata before copying it in
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else if ([importTarget isKindOfClass:[NSArray class]])
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{
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NSString * importKey = [importTarget objectAtIndex:0];
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NSValueTransformer *transformer =
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[NSValueTransformer valueTransformerForName:[importTarget objectAtIndex:1]];
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id transformedValue = [transformer transformedValue:
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[metadataItem valueForAttribute:mdKey]];
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[entry setValue:transformedValue forKey: importKey];
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}
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// The importKeys dictionary contains something strange...
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else
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{
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NSString *errString =
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[NSString stringWithFormat:@"ERROR: Could not import key %@", mdKey];
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NSAssert(NO, errString);
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}
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}
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return entry;
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}
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// Length is no longer a dependent key
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+ (NSSet *)keyPathsForValuesAffectingLength
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{
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return nil;
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}
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- (void)dealloc
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{
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self.length = nil;
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self.spotlightTrack = nil;
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}
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@synthesize length;
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@synthesize spotlightTrack;
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@end |