node-red-node-transmission-mh/transmission.js

A Node-RED node to access and control the Transmission torrent client Remote API.

/**
 * Copyright 2014, 2015 Andrew D Lindsay @AndrewDLindsay
 * http://blog.thiseldo.co.uk
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/

module.exports = function(RED) {
  "use strict";

  function TransmissionAPINode(n) {
    RED.nodes.createNode(this,n);
    var node = this;
    if (this.credentials &&
        this.credentials.hostname) {
      this.Transmission = require("transmission");
      this.TransmissionAPI = new this.Transmission({
        host: this.credentials.hostname,
        port: this.credentials.portnum,
        username: this.credentials.username,
        password: this.credentials.password
      });

      node.log( "Reauthenticating Transmission API with " + this.credentials.hostname );
    }
  }

  RED.nodes.registerType("transmission-config",TransmissionAPINode,{
    credentials: {
      hostname: { type:"text" },
      portnum: { type:"text" },
      username: { type:"text" },
      password: { type:"text" }
    }
  });


  function TransmissonTorrentList(n) {
    RED.nodes.createNode(this,n);
    this.config = RED.nodes.getNode(n.config);
    var node = this;
    var TransmissionAPI = this.config ? this.config.TransmissionAPI : null;

    if (!TransmissionAPI) {
      node.warn("Missing Transmission credentials");
      node.status({fill:"red",shape:"ring",text:"Missing Transmission credentials"});
      return;
    }

    node.status({});
    node.on("input", function(msg) {
      node.status({fill:"blue",shape:"dot",text:"Calling Transmission"});

      TransmissionAPI.get(function(err, result) {
        if (err) {
          node.error("failed to fetch Transmission Torrents : " + err);
          node.log( JSON.stringify( err ));

          node.status({fill:"red",shape:"ring",text:"error"});
          return;
        }

        node.status({});

        node.status({fill:"green",shape:"dot",text:"processing"});

        msg.topic = "/transmission.v1/torrentData";
        msg.payload = result;
        node.send(msg);

        node.status({});

      })
    })

  }
  RED.nodes.registerType("Transmission List Torrents", TransmissonTorrentList);


  function TransmissonTorrentAdd(n) {
    RED.nodes.createNode(this,n);
    this.config = RED.nodes.getNode(n.config);
    var node = this;
    var TransmissionAPI = this.config ? this.config.TransmissionAPI : null;

    if (!TransmissionAPI) {
      node.warn("Missing Transmission credentials");
      node.status({fill:"red",shape:"ring",text:"Missing Transmission credentials"});
      return;
    }

    //this.url = n.url || msg.url || "";

    node.status({});
    node.on("input", function(msg) {
      node.log("Entering Add Torrent section");
      node.status({fill:"blue",shape:"dot",text:"Calling Transmission"});
      var url;
      var msg2 = {};
      url = msg.url || n.url;
      node.log(url);

      TransmissionAPI.addUrl(url,function(err, result) {
        node.status({fill:"green", shape:"dot", text:"processing"});

        msg.topic = "/transmission.v1/torrentAdd";

        if (err) {
          msg.payload = {error: err};
        } else {
          msg.payload = result;
        }

        node.send(msg);
        node.status({});

      })
    })

  }
  RED.nodes.registerType("Transmission Add Torrent", TransmissonTorrentAdd);

  function TransmissonTorrentRemove(n) {
    RED.nodes.createNode(this,n);
    this.config = RED.nodes.getNode(n.config);
    var node = this;
    var TransmissionAPI = this.config ? this.config.TransmissionAPI : null;

    if (!TransmissionAPI) {
      node.warn("Missing Transmission credentials");
      node.status({fill:"red",shape:"ring",text:"Missing Transmission credentials"});
      return;
    }

    //this.url = n.url || msg.url || "";

    node.status({});
    node.on("input", function(msg) {
      node.log("Entering Remove Torrent section");
      node.status({fill:"blue",shape:"dot",text:"Calling Transmission"});
      var ids;
      var msg2 = {};
      ids = msg.ids || n.ids;
      node.log(ids);

      TransmissionAPI.remove(ids,function(err, result) {
        if (err) {
          node.error("failed to select Torrent ids : " + err);
          node.log( JSON.stringify( err ));

          node.status({fill:"red",shape:"ring",text:"error"});
          return;
        }

        node.status({});

        node.status({fill:"green",shape:"dot",text:"processing"});

        msg.topic = "/transmission.v1/torrentRemove";
        msg.payload = result;
        node.send(msg);

        node.status({});

      })
    })

  }
  RED.nodes.registerType("Transmission Remove Torrent", TransmissonTorrentRemove);

}