Introduce features/base/logging

The functionality around logging including logging_config.js i.e.
loggingConfig and the other classes and/or functions that initialize
loggers for Jits Meet truly deserves a feature of its own. Start getting
in that direction on both Web and mobile by introducing
features/base/logging and bringing loggingConfig to mobile.

modules/config/URLProcessor.js

@@ -1,10 +1,13 @@
-/* global config, interfaceConfig, loggingConfig, getConfigParamsFromUrl */
+/* global config, getConfigParamsFromUrl, interfaceConfig, loggingConfig */
+
 const logger = require("jitsi-meet-logger").getLogger(__filename);
 
 var configUtils = require('./Util');
 var params = {};
 
-params = getConfigParamsFromUrl();
+if (typeof getConfigParamsFromUrl === 'function') {
+    params = getConfigParamsFromUrl();
+}
 
 var URLProcessor = {
     setConfigParametersFromUrl: function () {

package.json

@@ -41,6 +41,7 @@
     "jssha": "1.5.0",
     "jws": "3.1.4",
     "lib-jitsi-meet": "jitsi/lib-jitsi-meet",
+    "lodash": "4.17.4",
     "postis": "2.2.0",
     "react": "15.4.2",
     "react-dom": "15.4.2",

react/features/app/functions.web.js

@@ -14,7 +14,6 @@ import {
 } from '../unsupported-browser';
 import { WelcomePage } from '../welcome';
 
-import URLProcessor from '../../../modules/config/URLProcessor';
 import KeyboardShortcut
     from '../../../modules/keyboardshortcut/keyboardshortcut';
 import getTokenData from '../../../modules/tokendata/TokenData';
@@ -115,7 +114,6 @@ export function _getRouteToRender(stateOrGetState: Object | Function) {
  * @returns {void}
  */
 export function init() {
-    URLProcessor.setConfigParametersFromUrl();
     _initLogging();
 
     APP.keyboardshortcut = KeyboardShortcut;
@@ -129,40 +127,6 @@ export function init() {
     APP.translation.init();
 }
 
-/**
- * Adjusts the logging levels.
- *
- * @private
- * @returns {void}
- */
-function _configureLoggingLevels() {
-    // NOTE The library Logger is separated from the app loggers, so the levels
-    // have to be set in two places
-
-    // Set default logging level
-    const defaultLogLevel
-        = loggingConfig.defaultLogLevel || JitsiMeetJS.logLevels.TRACE;
-
-    Logger.setLogLevel(defaultLogLevel);
-    JitsiMeetJS.setLogLevel(defaultLogLevel);
-
-    // NOTE console was used on purpose here to go around the logging and always
-    // print the default logging level to the console
-    console.info(`Default logging level set to: ${defaultLogLevel}`);
-
-    // Set log level for each logger
-    if (loggingConfig) {
-        Object.keys(loggingConfig).forEach(loggerName => {
-            if (loggerName !== 'defaultLogLevel') {
-                const level = loggingConfig[loggerName];
-
-                Logger.setLogLevelById(level, loggerName);
-                JitsiMeetJS.setLogLevelById(level, loggerName);
-            }
-        });
-    }
-}
-
 /**
  * Initializes logging in the app.
  *
@@ -170,9 +134,6 @@ function _configureLoggingLevels() {
  * @returns {void}
  */
 function _initLogging() {
-    // Adjust logging level
-    _configureLoggingLevels();
-
     // Create the LogCollector and register it as the global log transport. It
     // is done early to capture as much logs as possible. Captured logs will be
     // cached, before the JitsiMeetLogStorage gets ready (statistics module is

react/features/base/lib-jitsi-meet/actions.js

@@ -47,8 +47,8 @@ export function initLib() {
             throw new Error('Cannot init lib-jitsi-meet without config');
         }
 
-        // XXX Temporarily until conference.js is moved to the React app we
+        // FIXME Until the logic of conference.js is rewritten into the React
-        // shouldn't use JitsiMeetJS from the React app.
+        // app we, JitsiMeetJS.init is to not be used for the React app.
         if (typeof APP !== 'undefined') {
             return Promise.resolve();
         }

react/features/base/lib-jitsi-meet/functions.js

@@ -1,5 +1,7 @@
 import { loadScript } from '../../base/util';
 
+import URLProcessor from '../../../../modules/config/URLProcessor';
+
 import JitsiMeetJS from './_';
 
 declare var APP: Object;
@@ -38,6 +40,12 @@ export function loadConfig(host: string, path: string = '/config.js') {
     // being used for the React Native app because the old/current Web app uses
     // config from the global scope.
     if (typeof APP !== 'undefined') {
+        // FIXME The following call to setConfigParametersFromUrl is bad design
+        // but URLProcessor still deals with the global variables config,
+        // interfaceConfig, and loggingConfig and loadConfig. As the latter will
+        // surely change in the future, so will the former then.
+        URLProcessor.setConfigParametersFromUrl();
+
         return Promise.resolve(window.config);
     }
 

react/features/base/lib-jitsi-meet/middleware.js

@@ -1,6 +1,7 @@
 /* @flow */
 
 import { SET_CONFIG } from '../config';
+import { setLoggingConfig } from '../logging';
 import { PARTICIPANT_LEFT } from '../participants';
 import { MiddlewareRegistry } from '../redux';
 
@@ -106,6 +107,14 @@ function _setConfig({ dispatch, getState }, next, action) {
         // from there).
         next(action);
 
+        // FIXME Obviously, the following is bad design. However, I'm currently
+        // introducing the features base/config and base/logging and I'm trying
+        // to minimize the scope of the changes while I'm attempting to preserve
+        // compatibility with the existing partially React-ified Web source code
+        // and what was already executing on React Native. Additionally, I do
+        // not care to load logging_config.js on React Native.
+        dispatch(setLoggingConfig(window.loggingConfig));
+
         dispatch(initLib());
     });
 }

react/features/base/logging/actionTypes.js

@@ -0,0 +1,12 @@
+import { Symbol } from '../react';
+
+/**
+ * The type of redux action which sets the configuration of the feature
+ * base/logging.
+ *
+ * {
+ *     type: SET_LOGGING_CONFIG,
+ *     config: Object
+ * }
+ */
+export const SET_LOGGING_CONFIG = Symbol('SET_LOGGING_CONFIG');

react/features/base/logging/actions.js

@@ -0,0 +1,20 @@
+/* @flow */
+
+import { SET_LOGGING_CONFIG } from './actionTypes';
+
+/**
+ * Sets the configuration of the feature base/logging.
+ *
+ * @param {Object} config - The configuration to set on the features
+ * base/logging.
+ * @returns {{
+ *     type: SET_LOGGING_CONFIG,
+ *     config: Object
+ * }}
+ */
+export function setLoggingConfig(config: Object) {
+    return {
+        type: SET_LOGGING_CONFIG,
+        config
+    };
+}

react/features/base/logging/index.js

@@ -0,0 +1,5 @@
+export * from './actions';
+export * from './actionTypes';
+
+import './middleware';
+import './reducer';

react/features/base/logging/middleware.js

@@ -0,0 +1,131 @@
+/* @flow */
+
+import Logger from 'jitsi-meet-logger';
+
+import { APP_WILL_MOUNT } from '../../app';
+import JitsiMeetJS, { LIB_WILL_INIT } from '../lib-jitsi-meet';
+import { MiddlewareRegistry } from '../redux';
+
+import { SET_LOGGING_CONFIG } from './actionTypes';
+
+declare var APP: Object;
+
+/**
+ * The Redux middleware of the feature base/logging.
+ *
+ * @param {Store} store - The Redux store.
+ * @returns {Function}
+ * @private
+ */
+MiddlewareRegistry.register(store => next => action => {
+    switch (action.type) {
+    case APP_WILL_MOUNT:
+        return _appWillMount(store, next, action);
+
+    case LIB_WILL_INIT:
+        return _libWillInit(store, next, action);
+
+    case SET_LOGGING_CONFIG:
+        return _setLoggingConfig(store, next, action);
+    }
+
+    return next(action);
+});
+
+/**
+ * Notifies the feature base/logging that the action {@link APP_WILL_MOUNT} is
+ * being dispatched within a specific Redux {@code store}.
+ *
+ * @param {Store} store - The Redux store in which the specified {@code action}
+ * is being dispatched.
+ * @param {Dispatch} next - The Redux {@code dispatch} function to dispatch the
+ * specified {@code action} to the specified {@code store}.
+ * @param {Action} action - The Redux action {@code APP_WILL_MOUNT} which is
+ * being dispatched in the specified {@code store}.
+ * @private
+ * @returns {Object} The new state that is the result of the reduction of the
+ * specified {@code action}.
+ */
+function _appWillMount({ getState }, next, action) {
+    const { config } = getState()['features/base/logging'];
+
+    _setLogLevels(Logger, config);
+
+    // FIXME Until the logic of conference.js is rewritten into the React
+    // app we, JitsiMeetJS.init is to not be used for the React app.
+    // Consequently, LIB_WILL_INIT will not be dispatched. In the meantime, do
+    // the following:
+    typeof APP === 'undefined' || _setLogLevels(JitsiMeetJS, config);
+
+    return next(action);
+}
+
+/**
+ * Notifies the feature base/logging that the action {@link LIB_WILL_INIT} is
+ * being dispatched within a specific Redux {@code store}.
+ *
+ * @param {Store} store - The Redux store in which the specified {@code action}
+ * is being dispatched.
+ * @param {Dispatch} next - The Redux {@code dispatch} function to dispatch the
+ * specified {@code action} to the specified {@code store}.
+ * @param {Action} action - The Redux action {@code LIB_WILL_INIT} which is
+ * being dispatched in the specified {@code store}.
+ * @private
+ * @returns {Object} The new state that is the result of the reduction of the
+ * specified {@code action}.
+ */
+function _libWillInit({ getState }, next, action) {
+    _setLogLevels(JitsiMeetJS, getState()['features/base/logging'].config);
+
+    return next(action);
+}
+
+/**
+ * Notifies the feature base/logging that the action {@link SET_LOGGING_CONFIG}
+ * is being dispatched within a specific Redux {@code store}.
+ *
+ * @param {Store} store - The Redux store in which the specified {@code action}
+ * is being dispatched.
+ * @param {Dispatch} next - The Redux {@code dispatch} function to dispatch the
+ * specified {@code action} to the specified {@code store}.
+ * @param {Action} action - The Redux action {@code SET_LOGGING_CONFIG} which is
+ * being dispatched in the specified {@code store}.
+ * @private
+ * @returns {Object} The new state that is the result of the reduction of the
+ * specified {@code action}.
+ */
+function _setLoggingConfig({ getState }, next, action) {
+    const oldValue = getState()['features/base/logging'].config;
+    const result = next(action);
+    const newValue = getState()['features/base/logging'].config;
+
+    if (oldValue !== newValue) {
+        _setLogLevels(Logger, newValue);
+        _setLogLevels(JitsiMeetJS, newValue);
+    }
+
+    return result;
+}
+
+/**
+ * Sets the log levels of {@link Logger} or {@link JitsiMeetJS} in accord with
+ * a specific configuration.
+ *
+ * @param {Object} logger - The object on which the log levels are to be set.
+ * @param {Object} config - The configuration specifying the log levels to be
+ * set on {@code Logger} or {@code JitsiMeetJS}.
+ * @private
+ * @returns {void}
+ */
+function _setLogLevels(logger, config) {
+    // XXX The loggers of the library lib-jitsi-meet and the application
+    // jitsi-meet are separate, so the log levels have to be set in both.
+
+    // First, set the default log level.
+    logger.setLogLevel(config.defaultLogLevel);
+
+    // Second, set the log level of each logger explictly overriden by config.
+    Object.keys(config).forEach(
+        id =>
+            id === 'defaultLogLevel' || logger.setLogLevelById(config[id], id));
+}

react/features/base/logging/reducer.js

@@ -0,0 +1,61 @@
+import { equals, ReducerRegistry } from '../redux';
+
+import { SET_LOGGING_CONFIG } from './actionTypes';
+
+/**
+ * The initial state of the feature base/logging.
+ *
+ * @type {{
+ *     config: Object
+ * }}
+ */
+const INITIAL_STATE = {
+    config: {
+        defaultLogLevel: 'trace',
+
+        // The following are too verbose in their logging with the
+        // {@link #defaultLogLevel}:
+        'modules/statistics/CallStats.js': 'info',
+        'modules/xmpp/strophe.util.js': 'log'
+    }
+};
+
+ReducerRegistry.register(
+    'features/base/logging',
+    (state = INITIAL_STATE, action) => {
+        switch (action.type) {
+        case SET_LOGGING_CONFIG:
+            return _setLoggingConfig(state, action);
+
+        default:
+            return state;
+        }
+    });
+
+/**
+ * Reduces a specific Redux action SET_LOGGING_CONFIG of the feature
+ * base/logging.
+ *
+ * @param {Object} state - The Redux state of the feature base/logging.
+ * @param {Action} action - The Redux action SET_LOGGING_CONFIG to reduce.
+ * @private
+ * @returns {Object} The new state of the feature base/logging after the
+ * reduction of the specified action.
+ */
+function _setLoggingConfig(state, action) {
+    const config = {
+        // The config of INITIAL_STATE is the default configuration of the
+        // feature base/logging.
+        ...INITIAL_STATE.config,
+        ...action.config
+    };
+
+    if (equals(state.config, config)) {
+        return state;
+    }
+
+    return {
+        ...state,
+        config
+    };
+}

react/features/base/redux/functions.js

@@ -1,3 +1,5 @@
+import _ from 'lodash';
+
 /**
  * Sets specific properties of a specific state to specific values and prevents
  * unnecessary state changes.
@@ -21,6 +23,19 @@ export function assign(target, source) {
     return t;
 }
 
+/**
+ * Determines whether {@code a} equals {@code b} according to deep comparison
+ * (which makes sense for Redux and its state definition).
+ *
+ * @param {*} a - The value to compare to {@code b}.
+ * @param {*} b - The value to compare to {@code a}.
+ * @returns {boolean} True if {@code a} equals {@code b} (according to deep
+ * comparison); false, otherwise.
+ */
+export function equals(a, b) {
+    return _.isEqual(a, b);
+}
+
 /**
  * Sets a specific property of a specific state to a specific value. Prevents
  * unnecessary state changes (when the specified <tt>value</tt> is equal to the