93 lines
3.0 KiB
Objective-C
93 lines
3.0 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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extern NSPersistentContainer *kPersistentContainer;
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@implementation SpotlightPlaylistEntry
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+ (void)initialize {
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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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@[@"url", @"PathToURLTransformer"];
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// Extract the artist name from the authors array
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NSArray *artistTransform =
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@[@"artist", @"AuthorToArtistTransformer"];
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importKeys = @{ @"kMDItemTitle": @"title",
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@"kMDItemAlbum": @"album",
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@"kMDItemAudioTrackNumber": @"track",
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@"kMDItemRecordingYear": @"year",
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@"kMDItemMusicalGenre": @"genre",
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@"kMDItemDurationSeconds": @"length",
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@"kMDItemPath": URLTransform,
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@"kMDItemAuthors": artistTransform };
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}
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+ (PlaylistEntry *)playlistEntryWithMetadataItem:(NSMetadataItem *)metadataItem {
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__block PlaylistEntry *entry = nil;
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[kPersistentContainer.viewContext performBlockAndWait:^{
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entry = [NSEntityDescription insertNewObjectForEntityForName:@"PlaylistEntry" inManagedObjectContext:kPersistentContainer.viewContext];
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entry.deLeted = YES;
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NSMutableDictionary *dict = [[NSMutableDictionary 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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if(![metadataItem valueForAttribute:mdKey]) continue;
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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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if([importTarget isEqualToString:@"length"]) {
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// fake it
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NSNumber *number = [metadataItem valueForAttribute:mdKey];
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[dict setValue:@(44100.0) forKey:@"samplerate"];
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[dict setValue:@(44100.0 * [number doubleValue]) forKey:@"totalFrames"];
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} else {
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[dict setValue:[metadataItem valueForAttribute:mdKey]
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forKey:importTarget];
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}
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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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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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[dict 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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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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NSURL *url = [dict objectForKey:@"url"];
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[dict removeObjectForKey:@"url"];
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entry.url = url;
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[entry setMetadata:dict];
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}];
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return entry;
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}
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@end
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