Adding download tab and download manager, ffmpeg in worker thread

server/objects/Download.js

@@ -0,0 +1,107 @@
+const DEFAULT_EXPIRATION = 1000 * 60 * 10 // 10 minutes
+
+class Download {
+  constructor(download) {
+    this.id = null
+    this.audiobookId = null
+    this.type = null
+    this.options = {}
+
+    this.dirpath = null
+    this.fullPath = null
+    this.ext = null
+    this.filename = null
+    this.size = 0
+
+    this.userId = null
+    this.socket = null // Socket to notify when complete
+    this.isReady = false
+
+    this.startedAt = null
+    this.finishedAt = null
+    this.expiresAt = null
+
+    this.expirationTimeMs = 0
+
+    if (download) {
+      this.construct(download)
+    }
+  }
+
+  get mimeType() {
+    if (this.ext === '.mp3' || this.ext === '.m4b' || this.ext === '.m4a') {
+      return 'audio/mpeg'
+    } else if (this.ext === '.mp4') {
+      return 'audio/mp4'
+    } else if (this.ext === '.ogg') {
+      return 'audio/ogg'
+    } else if (this.ext === '.aac' || this.ext === '.m4p') {
+      return 'audio/aac'
+    }
+    return 'audio/mpeg'
+  }
+
+  toJSON() {
+    return {
+      id: this.id,
+      audiobookId: this.audiobookId,
+      type: this.type,
+      options: this.options,
+      dirpath: this.dirpath,
+      fullPath: this.fullPath,
+      ext: this.ext,
+      filename: this.filename,
+      size: this.size,
+      userId: this.userId,
+      isReady: this.isReady,
+      startedAt: this.startedAt,
+      finishedAt: this.finishedAt,
+      expirationSeconds: this.expirationSeconds
+    }
+  }
+
+  construct(download) {
+    this.id = download.id
+    this.audiobookId = download.audiobookId
+    this.type = download.type
+    this.options = { ...download.options }
+
+    this.dirpath = download.dirpath
+    this.fullPath = download.fullPath
+    this.ext = download.ext
+    this.filename = download.filename
+    this.size = download.size || 0
+
+    this.userId = download.userId
+    this.socket = download.socket || null
+    this.isReady = !!download.isReady
+
+    this.startedAt = download.startedAt
+    this.finishedAt = download.finishedAt || null
+
+    this.expirationTimeMs = download.expirationTimeMs || DEFAULT_EXPIRATION
+    this.expiresAt = download.expiresAt || null
+  }
+
+  setData(downloadData) {
+    downloadData.startedAt = Date.now()
+    downloadData.isProcessing = true
+    this.construct(downloadData)
+  }
+
+  setComplete(fileSize) {
+    this.finishedAt = Date.now()
+    this.size = fileSize
+    this.isReady = true
+    this.expiresAt = this.finishedAt + this.expirationTimeMs
+  }
+
+  setExpirationTimer(callback) {
+    setTimeout(() => {
+      if (callback) {
+        callback(this)
+      }
+    }, this.expirationTimeMs)
+  }
+}
+module.exports = Download