Refactor storage model to work with native Realm

ios/App/Shared/models/download/DownloadItem.swift

@@ -0,0 +1,97 @@
+//
+//  DownloadItem.swift
+//  App
+//
+//  Created by Ron Heft on 8/16/22.
+//
+
+import Foundation
+import RealmSwift
+
+class DownloadItem: Object, Codable {
+    @Persisted(primaryKey: true) var id: String?
+    @Persisted(indexed: true) var libraryItemId: String?
+    @Persisted var episodeId: String?
+    @Persisted var userMediaProgress: MediaProgress?
+    @Persisted var serverConnectionConfigId: String?
+    @Persisted var serverAddress: String?
+    @Persisted var serverUserId: String?
+    @Persisted var mediaType: String?
+    @Persisted var itemTitle: String?
+    @Persisted var media: MediaType?
+    @Persisted var downloadItemParts = List<DownloadItemPart>()
+    
+    private enum CodingKeys : String, CodingKey {
+        case id, libraryItemId, episodeId, serverConnectionConfigId, serverAddress, serverUserId, mediaType, itemTitle, downloadItemParts
+    }
+    
+    override init() {
+        super.init()
+    }
+    
+    required init(from decoder: Decoder) throws {
+        super.init()
+        
+        let values = try decoder.container(keyedBy: CodingKeys.self)
+        id = try? values.decode(String.self, forKey: .id)
+        libraryItemId = try? values.decode(String.self, forKey: .libraryItemId)
+        episodeId = try? values.decode(String.self, forKey: .episodeId)
+        serverConnectionConfigId = try? values.decode(String.self, forKey: .serverConnectionConfigId)
+        serverAddress = try? values.decode(String.self, forKey: .serverAddress)
+        serverUserId = try? values.decode(String.self, forKey: .serverUserId)
+        mediaType = try? values.decode(String.self, forKey: .mediaType)
+        itemTitle = try? values.decode(String.self, forKey: .itemTitle)
+        if let parts = try? values.decode([DownloadItemPart].self, forKey: .downloadItemParts) {
+            downloadItemParts.append(objectsIn: parts)
+        }
+    }
+    
+    func encode(to encoder: Encoder) throws {
+        var container = encoder.container(keyedBy: CodingKeys.self)
+        try container.encode(id, forKey: .id)
+        try container.encode(libraryItemId, forKey: .libraryItemId)
+        try container.encode(episodeId, forKey: .episodeId)
+        try container.encode(serverConnectionConfigId, forKey: .serverConnectionConfigId)
+        try container.encode(serverAddress, forKey: .serverAddress)
+        try container.encode(serverUserId, forKey: .serverUserId)
+        try container.encode(mediaType, forKey: .mediaType)
+        try container.encode(itemTitle, forKey: .itemTitle)
+        try container.encode(Array(downloadItemParts), forKey: .downloadItemParts)
+    }
+}
+
+extension DownloadItem {
+    convenience init(libraryItem: LibraryItem, episodeId: String?, server: ServerConnectionConfig) {
+        self.init()
+        
+        self.id = libraryItem.id
+        self.libraryItemId = libraryItem.id
+        self.userMediaProgress = libraryItem.userMediaProgress
+        self.serverConnectionConfigId = server.id
+        self.serverAddress = server.address
+        self.serverUserId = server.userId
+        self.mediaType = libraryItem.mediaType
+        self.itemTitle = libraryItem.media?.metadata?.title
+        self.media = libraryItem.media
+        
+        if let episodeId = episodeId {
+            self.id! += "-\(episodeId)"
+            self.episodeId = episodeId
+        }
+    }
+    
+    func isDoneDownloading() -> Bool {
+        self.downloadItemParts.allSatisfy({ $0.completed })
+    }
+    
+    func didDownloadSuccessfully() -> Bool {
+        self.downloadItemParts.allSatisfy({ $0.failed == false })
+    }
+    
+    func delete() {
+        try! self.realm?.write {
+            self.realm?.delete(self.downloadItemParts)
+            self.realm?.delete(self)
+        }
+    }
+}