Channel playlists cache

Model/Cache/ChannelPlaylistsCacheModel.swift

@@ -0,0 +1,70 @@
+import Cache
+import Foundation
+import Logging
+import SwiftyJSON
+
+struct ChannelPlaylistsCacheModel {
+    static let shared = ChannelPlaylistsCacheModel()
+    let logger = Logger(label: "stream.yattee.cache.channel-playlists")
+
+    static let diskConfig = DiskConfig(name: "channel-playlists")
+    static let memoryConfig = MemoryConfig()
+
+    let storage = try! Storage<String, JSON>(
+        diskConfig: Self.diskConfig,
+        memoryConfig: Self.memoryConfig,
+        transformer: CacheModel.jsonTransformer
+    )
+
+    func storePlaylist(playlist: ChannelPlaylist) {
+        let date = CacheModel.shared.iso8601DateFormatter.string(from: Date())
+        logger.info("STORE \(playlistCacheKey(playlist.id)) -- \(date)")
+        let feedTimeObject: JSON = ["date": date]
+        let playlistObject: JSON = ["playlist": playlist.json.object]
+        try? storage.setObject(feedTimeObject, forKey: playlistTimeCacheKey(playlist.id))
+        try? storage.setObject(playlistObject, forKey: playlistCacheKey(playlist.id))
+    }
+
+    func retrievePlaylist(_ id: ChannelPlaylist.ID) -> ChannelPlaylist? {
+        logger.info("RETRIEVE \(playlistCacheKey(id))")
+
+        if let json = try? storage.object(forKey: playlistCacheKey(id)).dictionaryValue["playlist"] {
+            return ChannelPlaylist.from(json)
+        }
+
+        return nil
+    }
+
+    func getPlaylistsTime(_ id: ChannelPlaylist.ID) -> Date? {
+        if let json = try? storage.object(forKey: playlistTimeCacheKey(id)),
+           let string = json.dictionaryValue["date"]?.string,
+           let date = CacheModel.shared.iso8601DateFormatter.date(from: string)
+        {
+            return date
+        }
+
+        return nil
+    }
+
+    func getFormattedPlaylistTime(_ id: ChannelPlaylist.ID) -> String {
+        if let time = getPlaylistsTime(id) {
+            let isSameDay = Calendar(identifier: .iso8601).isDate(time, inSameDayAs: Date())
+            let formatter = isSameDay ? CacheModel.shared.dateFormatterForTimeOnly : CacheModel.shared.dateFormatter
+            return formatter.string(from: time)
+        }
+
+        return ""
+    }
+
+    func clear() {
+        try? storage.removeAll()
+    }
+
+    private func playlistCacheKey(_ playlist: ChannelPlaylist.ID) -> String {
+        "channelplaylists-\(playlist)"
+    }
+
+    private func playlistTimeCacheKey(_ playlist: ChannelPlaylist.ID) -> String {
+        "\(playlistCacheKey(playlist))-time"
+    }
+}

Model/ChannelPlaylist.swift

@@ -1,4 +1,5 @@
 import Foundation
+import SwiftyJSON
 
 struct ChannelPlaylist: Identifiable {
     var id: String = UUID().uuidString
@@ -7,4 +8,26 @@ struct ChannelPlaylist: Identifiable {
     var channel: Channel?
     var videos = [Video]()
     var videosCount: Int?
+
+    var json: JSON {
+        [
+            "id": id,
+            "title": title,
+            "thumbnailURL": thumbnailURL?.absoluteString ?? "",
+            "channel": channel?.json.object ?? "",
+            "videos": videos.map { $0.json.object },
+            "videosCount": String(videosCount ?? 0)
+        ]
+    }
+
+    static func from(_ json: JSON) -> Self {
+        ChannelPlaylist(
+            id: json["id"].stringValue,
+            title: json["title"].stringValue,
+            thumbnailURL: json["thumbnailURL"].url,
+            channel: Channel.from(json["channel"]),
+            videos: json["videos"].arrayValue.map { Video.from($0) },
+            videosCount: json["videosCount"].int
+        )
+    }
 }

Model/Playlist.swift

@@ -40,8 +40,6 @@ struct Playlist: Identifiable, Equatable, Hashable {
     }
 
     var json: JSON {
-        let dateFormatter = ISO8601DateFormatter()
-
         return [
             "id": id,
             "title": title,
@@ -53,8 +51,6 @@ struct Playlist: Identifiable, Equatable, Hashable {
     }
 
     static func from(_ json: JSON) -> Self {
-        let dateFormatter = ISO8601DateFormatter()
-
         return .init(
             id: json["id"].stringValue,
             title: json["title"].stringValue,
@@ -71,4 +67,8 @@ struct Playlist: Identifiable, Equatable, Hashable {
     func hash(into hasher: inout Hasher) {
         hasher.combine(id)
     }
+
+    var channelPlaylist: ChannelPlaylist {
+        ChannelPlaylist(id: id, title: title, videos: videos, videosCount: videos.count)
+    }
 }