Refactor storage model to work with native Realm

ios/App/Shared/models/server/AudioTrack.swift

@@ -0,0 +1,72 @@
+//
+//  AudioTrack.swift
+//  App
+//
+//  Created by Ron Heft on 8/16/22.
+//
+
+import Foundation
+import RealmSwift
+
+class AudioTrack: EmbeddedObject, Codable {
+    @Persisted var index: Int?
+    @Persisted var startOffset: Double?
+    @Persisted var duration: Double = 0
+    @Persisted var title: String?
+    @Persisted var contentUrl: String?
+    @Persisted var mimeType: String = ""
+    @Persisted var metadata: FileMetadata?
+    @Persisted var localFileId: String?
+    @Persisted var serverIndex: Int?
+    
+    private enum CodingKeys : String, CodingKey {
+        case index, startOffset, duration, title, contentUrl, mimeType, metadata, localFileId, serverIndex
+    }
+    
+    override init() {
+        super.init()
+    }
+    
+    required init(from decoder: Decoder) throws {
+        super.init()
+        let values = try decoder.container(keyedBy: CodingKeys.self)
+        index = try? values.decode(Int.self, forKey: .index)
+        startOffset = try? values.decode(Double.self, forKey: .startOffset)
+        duration = try values.decode(Double.self, forKey: .duration)
+        title = try? values.decode(String.self, forKey: .title)
+        contentUrl = try? values.decode(String.self, forKey: .contentUrl)
+        mimeType = try values.decode(String.self, forKey: .mimeType)
+        metadata = try? values.decode(FileMetadata.self, forKey: .metadata)
+        localFileId = try! values.decodeIfPresent(String.self, forKey: .localFileId)
+        serverIndex = try? values.decode(Int.self, forKey: .serverIndex)
+    }
+    
+    func encode(to encoder: Encoder) throws {
+        var container = encoder.container(keyedBy: CodingKeys.self)
+        try container.encode(index, forKey: .index)
+        try container.encode(startOffset, forKey: .startOffset)
+        try container.encode(duration, forKey: .duration)
+        try container.encode(title, forKey: .title)
+        try container.encode(contentUrl, forKey: .contentUrl)
+        try container.encode(mimeType, forKey: .mimeType)
+        try container.encode(metadata, forKey: .metadata)
+        try container.encode(localFileId, forKey: .localFileId)
+        try container.encode(serverIndex, forKey: .serverIndex)
+    }
+}
+
+extension AudioTrack {
+    func setLocalInfo(filenameIdMap: [String: String], serverIndex: Int) -> Bool {
+        if let localFileId = filenameIdMap[self.metadata?.filename ?? ""] {
+            self.localFileId = localFileId
+            self.serverIndex = serverIndex
+            return true
+        }
+        return false
+    }
+    
+    func getLocalFile() -> LocalFile? {
+        guard let localFileId = self.localFileId else { return nil }
+        return Database.shared.getLocalFile(localFileId: localFileId)
+    }
+}