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gaia/shared/js/dump.js

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+/* globals dump */
+
+(function() {
+  'use strict';
+
+  function dump_off(msg, optionalObject) {}
+  function dump_on(msg, optionalObject) {
+    var output = msg;
+    if (optionalObject) {
+      try {
+        output += JSON.stringify(optionalObject);
+      } catch(e) {}
+    }
+    if (dump) {
+      var appName = document.location.hostname.replace(/\..*$/, '');
+      dump('[' + appName + '] ' + output + '\n');
+    } else {
+      console.log(output);
+    }
+  }
+
+  window.DUMP = dump_off;   // no traces by default
+
+  // enable/disable DUMP according to the related setting
+  var settings = window.navigator.mozSettings;
+  var reqGaiaDebug = settings.createLock().get('debug.gaia.enabled');
+  reqGaiaDebug.onsuccess = function gaiaDebug() {
+    window.DUMP =
+      reqGaiaDebug.result['debug.gaia.enabled'] ? dump_on : dump_off;
+  };
+  settings.addObserver('debug.gaia.enabled', function(event) {
+    window.DUMP = event.settingValue ? dump_on : dump_off;
+    dump_on(event.settingValue ? 'Enabling DUMP' : 'Disabling DUMP');
+  });
+}());