Adding download tab and download manager, ffmpeg in worker thread

server/objects/AudiobookFile.js

@@ -0,0 +1,48 @@
+class AudiobookFile {
+  constructor(data) {
+    this.ino = null
+    this.filetype = null
+    this.filename = null
+    this.ext = null
+    this.path = null
+    this.fullPath = null
+    this.addedAt = null
+
+    if (data) {
+      this.construct(data)
+    }
+  }
+
+  toJSON() {
+    return {
+      ino: this.ino || null,
+      filetype: this.filetype,
+      filename: this.filename,
+      ext: this.ext,
+      path: this.path,
+      fullPath: this.fullPath,
+      addedAt: this.addedAt
+    }
+  }
+
+  construct(data) {
+    this.ino = data.ino || null
+    this.filetype = data.filetype
+    this.filename = data.filename
+    this.ext = data.ext
+    this.path = data.path
+    this.fullPath = data.fullPath
+    this.addedAt = data.addedAt
+  }
+
+  setData(data) {
+    this.ino = data.ino || null
+    this.filetype = data.filetype
+    this.filename = data.filename
+    this.ext = data.ext
+    this.path = data.path
+    this.fullPath = data.fullPath
+    this.addedAt = Date.now()
+  }
+}
+module.exports = AudiobookFile