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186
assets/webapps/system.gaiamobile.org/shared/js/icc_helper.js
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186
assets/webapps/system.gaiamobile.org/shared/js/icc_helper.js
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'use strict';
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/**
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* IccHelper redirect calls to ICC related APIs to correct object. IccHelper is
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* created for backward compatibility of gaia master after the patch of
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* bug 814637 landed in m-c. In the patch the interface provided by IccManager
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* was moved to a MozIcc object. Details please refer to the URL[1].
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* The helper *MUST* be removed once all gaia developement no longer depend
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* on b2g26.
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* [1]: https://wiki.mozilla.org/WebAPI/WebIccManager/Multi-SIM
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*/
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(function(exports) {
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var _iccManager = navigator.mozIccManager;
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var _iccProxy = null;
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Object.defineProperty(exports, 'IccHelper', {
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configurable: true,
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get: function() {
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return _iccProxy;
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},
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// This is for code that sets value to IccHelper. And for unit tests that
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// mock IccHelper.
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set: function(value) {
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_iccProxy = value;
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}
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});
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if (_iccManager && _iccManager.getIccById) {
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var activeIccObj = null;
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var eventListeners = {};
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var cachedEventListeners = {}; // cache on + 'eventName' event handlers
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var events = ['cardstatechange', 'iccinfochange',
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'stkcommand', 'stksessionend'];
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var getters = ['iccInfo', 'cardState'];
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var methods = ['sendStkResponse', 'sendStkMenuSelection',
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'sendStkTimerExpiration', 'sendStkEventDownload'];
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var domRequests = ['getCardLock', 'unlockCardLock', 'setCardLock',
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'getCardLockRetryCount', 'readContacts',
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'updateContact', 'iccOpenChannel', 'iccExchangeAPDU',
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'iccCloseChannel'];
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var getterTemplate = function(name) {
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return function() {
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if (activeIccObj) {
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return activeIccObj[name];
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} else {
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return null;
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}
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};
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};
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var methodTemplate = function(name) {
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return function() {
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if (activeIccObj) {
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return activeIccObj[name].apply(activeIccObj, arguments);
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}
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};
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};
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// Multi-SIM API available
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var createIccProxy = function() {
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var iccProxy = {
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addEventListener: function(eventName, callback) {
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if (typeof callback !== 'function') {
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return;
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}
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if (events.indexOf(eventName) === -1) {
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return;
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}
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var listeners = eventListeners[eventName];
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if (listeners == null) {
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listeners = eventListeners[eventName] = [];
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}
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if (listeners.indexOf(callback) === -1) {
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listeners.push(callback);
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}
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},
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removeEventListener: function(eventName, callback) {
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var listeners = eventListeners[eventName];
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if (listeners) {
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var index = listeners.indexOf(callback);
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if (index !== -1) {
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listeners.splice(index, 1);
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}
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}
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}
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};
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getters.forEach(function(getter) {
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Object.defineProperty(iccProxy, getter, {
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enumerable: true,
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get: getterTemplate(getter)
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});
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});
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methods.forEach(function(method) {
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iccProxy[method] = methodTemplate(method);
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});
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domRequests.forEach(function(request) {
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iccProxy[request] = methodTemplate(request);
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});
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events.forEach(function(eventName) {
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// Define 'on' + eventName properties
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// Assigning an event handler and adding an event listener are
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// handled separately. We need to simulate the same behavior in
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// IccHelper.
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Object.defineProperty(iccProxy, 'on' + eventName, {
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enumerable: true,
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set: function(newListener) {
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var oldListener = cachedEventListeners[eventName];
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if (oldListener) {
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iccProxy.removeEventListener(eventName, oldListener);
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}
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cachedEventListeners[eventName] = newListener;
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if (newListener) {
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iccProxy.addEventListener(eventName, newListener);
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}
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},
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get: function() {
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return cachedEventListeners[eventName];
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}
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});
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});
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return iccProxy;
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};
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// Initialize icc proxy
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_iccProxy = createIccProxy();
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if (_iccManager.iccIds && _iccManager.iccIds.length) {
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activeIccObj = _iccManager.getIccById(_iccManager.iccIds[0]);
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if (activeIccObj) {
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// register to callback
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events.forEach(function(eventName) {
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activeIccObj.addEventListener(eventName, function(event) {
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var listeners = eventListeners[eventName];
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if (listeners) {
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listeners.forEach(function(listener) {
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listener(event);
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});
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}
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});
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});
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}
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}
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_iccManager.oniccdetected = function(event) {
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if (_iccProxy.cardState == null) {
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activeIccObj = _iccManager.getIccById(event.iccId);
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if (activeIccObj) {
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// register to callback
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events.forEach(function(eventName) {
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activeIccObj.addEventListener(eventName, function(event) {
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var listeners = eventListeners[eventName];
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if (listeners) {
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listeners.forEach(function(listener) {
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listener(event);
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});
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}
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});
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});
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// trigger cardstatechange and iccinfochange manually when a mozIcc
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// object becomes valid (detected).
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['cardstatechange', 'iccinfochange'].forEach(function(eventName) {
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if (eventListeners[eventName]) {
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eventListeners[eventName].forEach(function(listener) {
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listener();
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});
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}
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});
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}
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}
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};
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} else {
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_iccProxy = _iccManager;
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}
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})(window);
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