Download queue manager

core/download_queue.js

@@ -0,0 +1,47 @@
+/* jslint node: true */
+'use strict';
+
+const FileEntry	= require('./file_entry.js');
+
+module.exports = class DownloadQueue {
+	constructor(user) {
+		this.user = user;
+
+		this.user.downloadQueue = this.user.downloadQueue || [];
+	}
+
+	toggle(fileEntry) {
+		if(this.isQueued(fileEntry)) {
+			this.user.downloadQueue = this.user.downloadQueue.filter(e => fileEntry.fileId !== e.fileId);
+		} else {
+			this.add(fileEntry);
+		}
+	}
+
+	add(fileEntry) {
+		this.user.downloadQueue.push({
+			fileId		: fileEntry.fileId,
+			areaTag		: fileEntry.areaTag,
+			fileName	: fileEntry.fileName,
+			byteSize	: fileEntry.meta.byteSize || 0,
+		});
+	}
+
+	isQueued(entryOrId) {
+		if(entryOrId instanceof FileEntry) {
+			entryOrId = entryOrId.fileId;
+		}
+
+		return this.user.downloadQueue.find(e => entryOrId === e.fileId) ? true : false;
+	}
+
+	toProperty() { return JSON.stringify(this.user.downloadQueue); }
+	
+	loadFromProperty(prop) {
+		try {
+			this.user.downloadQueue = JSON.parse(prop);
+		} catch(e) {
+			this.user.log.error( { error : e.message, property : prop }, 'Failed parsing download queue property'); 			
+		}
+	}	
+};