extra-tts-ipc.js

(function () {
  var ipcRenderer = null;
  try {
    ipcRenderer = window.ipcRenderer || require('electron').ipcRenderer;
  } catch(e) { }
  var extra_tts = null;
  
  var tts = {
      callbacks: {},
      clean_callbacks: function() {
        var now = (new Date()).getTime();
        var new_callbacks = {};
        for(var idx in tts.callbacks) {
          if(tts.callbacks[idx] && tts.callbacks[idx].timestamp && tts.callbacks[idx].timestamp > now - (30 * 60 * 1000)) {
            new_callbacks[idx] = tts.callbacks[idx];
          }
        }
        tts.callbacks = new_callbacks;
      },
      add_callback: function(callback, type) {
        tts.clean_callbacks();
        var now = (new Date()).getTime();
        var id = null;
        if(callback) {
            id = (Math.random() * 9999) + "-" + now;
            tts.callbacks[id] = {
            timestamp: now,
            type: type,
            callback: callback,
            id: id
          };
        }
        return id;
      },
      trigger_callback: function (object) {
        if(object.callback_id && tts.callbacks[object.callback_id]) {
          tts.callbacks[object.callback_id].callback(object.result);
        }
      },
      run: function(method, a, b, c) {
        if(tts.ipc) {
          var success_id = tts.add_callback(a && a.success, 'success');
          var progress_id = tts.add_callback(a && a.progress, 'progress');
          var error_id = tts.add_callback(a && a.error, 'error');
          if(a) {
            delete a['success'];
            delete a['error'];
            delete a['progress'];
          }
          if(a) {
            a.base_dir = tts.base_dir;
          }
          ipcRenderer.send('extra-tts-exec', JSON.stringify({
            method: method,
            success_id: success_id,
            progress_id: progress_id,
            error_id: error_id,
            args: [a, b, c]
          }));
        } else {
          console.log("extra-tts will run in the current process");
          extra_tts = extra_tts || (window.node_extras && window.node_extras.extra_tts) || require('extra-tts');
          extra_tts[method].apply(extra_tts, [a, b, c]);
        }
      },
      enabled: false
  };
  
  var keys = ['init', 'status', 'reload', 'getAvailableVoices', 'downloadVoice', 'deleteVoice', 'speakText', 'stopSpeakingText'];
  for (var idx = 0; idx < keys.length; idx++) {
      (function (method) {
          tts[method] = function (a, b, c) {
              tts.run(method, a, b, c);
          }
      })(keys[idx]);
  }
  
  if(ipcRenderer && ipcRenderer.send) {    
    ipcRenderer.on('extra-tts-ready', function(event, message) {
      if(message == 'ready') {
        console.log("extra-tts will run in the main electron process");
        tts.ipc = true;
      }
    });
    setTimeout(function() {
      ipcRenderer.send('extra-tts-ready');
    }, 100);

    ipcRenderer.on('extra-tts-exec-result', function (event, message) {
      console.log("RESULT");
      var json = JSON.parse(message);
      if(json.callback_id) {
        tts.trigger_callback(json);
      }
    });
  }

  module.exports = tts;
})();