4c95c943ef
Completely rewrite the playlist storage once again, this time with a much faster Core Data implementation. It still uses a little magic for Album Artwork consolidation, but string consolidation doesn't seem to be needed to reduce the disk storage size. Works much faster than my silly implementation, too. Old implementations are still kept for backwards compatibility with existing playlists. Signed-off-by: Christopher Snowhill <kode54@gmail.com>
68 lines
2.3 KiB
Objective-C
68 lines
2.3 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 *__persistentContainer;
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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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@"kMDItemPath": URLTransform,
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@"kMDItemAuthors": artistTransform };
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}
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+ (PlaylistEntry *)playlistEntryWithMetadataItem:(NSMetadataItem *)metadataItem {
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PlaylistEntry *entry = [NSEntityDescription insertNewObjectForEntityForName:@"PlaylistEntry" inManagedObjectContext:__persistentContainer.viewContext];
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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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[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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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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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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@end
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