michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: "use strict";
michael@0: 
michael@0: const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
michael@0: 
michael@0: Cu.import("resource://gre/modules/XPCOMUtils.jsm");
michael@0: Cu.import("resource://gre/modules/Services.jsm");
michael@0: 
michael@0: // JS shim that contains the callback functions to be triggered from the
michael@0: // payment provider's code in order to fire DOMRequest events.
michael@0: const kPaymentShimFile = "chrome://b2g/content/payment.js";
michael@0: 
michael@0: // Type of MozChromEvents to handle payment dialogs.
michael@0: const kOpenPaymentConfirmationEvent = "open-payment-confirmation-dialog";
michael@0: const kOpenPaymentFlowEvent = "open-payment-flow-dialog";
michael@0: 
michael@0: const PREF_DEBUG = "dom.payment.debug";
michael@0: 
michael@0: XPCOMUtils.defineLazyServiceGetter(this, "uuidgen",
michael@0:                                    "@mozilla.org/uuid-generator;1",
michael@0:                                    "nsIUUIDGenerator");
michael@0: 
michael@0: XPCOMUtils.defineLazyModuleGetter(this, "SystemAppProxy",
michael@0:                                   "resource://gre/modules/SystemAppProxy.jsm");
michael@0: 
michael@0: function PaymentUI() {
michael@0:   try {
michael@0:     this._debug =
michael@0:       Services.prefs.getPrefType(PREF_DEBUG) == Ci.nsIPrefBranch.PREF_BOOL
michael@0:       && Services.prefs.getBoolPref(PREF_DEBUG);
michael@0:   } catch(e) {
michael@0:     this._debug = false;
michael@0:   }
michael@0: }
michael@0: 
michael@0: PaymentUI.prototype = {
michael@0: 
michael@0:   confirmPaymentRequest: function confirmPaymentRequest(aRequestId,
michael@0:                                                         aRequests,
michael@0:                                                         aSuccessCb,
michael@0:                                                         aErrorCb) {
michael@0:     let _error = function _error(errorMsg) {
michael@0:       if (aErrorCb) {
michael@0:         aErrorCb.onresult(aRequestId, errorMsg);
michael@0:       }
michael@0:     };
michael@0: 
michael@0:     // The UI should listen for mozChromeEvent 'open-payment-confirmation-dialog'
michael@0:     // type in order to create and show the payment request confirmation frame
michael@0:     // embeded within a trusted dialog.
michael@0:     let id = kOpenPaymentConfirmationEvent + "-" + this.getRandomId();
michael@0:     let detail = {
michael@0:       type: kOpenPaymentConfirmationEvent,
michael@0:       id: id,
michael@0:       requestId: aRequestId,
michael@0:       paymentRequests: aRequests
michael@0:     };
michael@0: 
michael@0:     // Once the user confirm the payment request and makes his choice, we get
michael@0:     // back to the DOM part to get the appropriate payment flow information
michael@0:     // based on the selected payment provider.
michael@0:     this._handleSelection = (function _handleSelection(evt) {
michael@0:       let msg = evt.detail;
michael@0:       if (msg.id != id) {
michael@0:         return;
michael@0:       }
michael@0: 
michael@0:       if (msg.userSelection && aSuccessCb) {
michael@0:         aSuccessCb.onresult(aRequestId, msg.userSelection);
michael@0:       } else if (msg.errorMsg) {
michael@0:         _error(msg.errorMsg);
michael@0:       }
michael@0: 
michael@0:       SystemAppProxy.removeEventListener("mozContentEvent", this._handleSelection);
michael@0:       this._handleSelection = null;
michael@0:     }).bind(this);
michael@0:     SystemAppProxy.addEventListener("mozContentEvent", this._handleSelection);
michael@0: 
michael@0:     SystemAppProxy.dispatchEvent(detail);
michael@0:   },
michael@0: 
michael@0:   showPaymentFlow: function showPaymentFlow(aRequestId,
michael@0:                                             aPaymentFlowInfo,
michael@0:                                             aErrorCb) {
michael@0:     let _error = function _error(errorMsg) {
michael@0:       if (aErrorCb) {
michael@0:         aErrorCb.onresult(aRequestId, errorMsg);
michael@0:       }
michael@0:     };
michael@0: 
michael@0:     // We ask the UI to browse to the selected payment flow.
michael@0:     let id = kOpenPaymentFlowEvent + "-" + this.getRandomId();
michael@0:     let detail = {
michael@0:       type: kOpenPaymentFlowEvent,
michael@0:       id: id,
michael@0:       requestId: aRequestId,
michael@0:       uri: aPaymentFlowInfo.uri,
michael@0:       method: aPaymentFlowInfo.requestMethod,
michael@0:       jwt: aPaymentFlowInfo.jwt
michael@0:     };
michael@0: 
michael@0:     // At some point the UI would send the created iframe back so the
michael@0:     // callbacks for firing DOMRequest events can be loaded on its
michael@0:     // content.
michael@0:     this._loadPaymentShim = (function _loadPaymentShim(evt) {
michael@0:       let msg = evt.detail;
michael@0:       if (msg.id != id) {
michael@0:         return;
michael@0:       }
michael@0: 
michael@0:       if (msg.errorMsg) {
michael@0:         SystemAppProxy.removeEventListener("mozContentEvent", this._loadPaymentShim);
michael@0:         this._loadPaymentShim = null;
michael@0:         _error("ERROR_LOADING_PAYMENT_SHIM: " + msg.errorMsg);
michael@0:         return;
michael@0:       }
michael@0: 
michael@0:       if (!msg.frame) {
michael@0:         SystemAppProxy.removeEventListener("mozContentEvent", this._loadPaymentShim);
michael@0:         this._loadPaymentShim = null;
michael@0:         _error("ERROR_LOADING_PAYMENT_SHIM");
michael@0:         return;
michael@0:       }
michael@0: 
michael@0:       // Try to load the payment shim file containing the payment callbacks
michael@0:       // in the content script.
michael@0:       let frame = msg.frame;
michael@0:       let frameLoader = frame.QueryInterface(Ci.nsIFrameLoaderOwner)
michael@0:                              .frameLoader;
michael@0:       let mm = frameLoader.messageManager;
michael@0:       try {
michael@0:         mm.loadFrameScript(kPaymentShimFile, true, true);
michael@0:         mm.sendAsyncMessage("Payment:LoadShim", { requestId: aRequestId });
michael@0:       } catch (e) {
michael@0:         if (this._debug) {
michael@0:           this.LOG("Error loading " + kPaymentShimFile + " as a frame script: "
michael@0:                     + e);
michael@0:         }
michael@0:         _error("ERROR_LOADING_PAYMENT_SHIM");
michael@0:       } finally {
michael@0:         SystemAppProxy.removeEventListener("mozContentEvent", this._loadPaymentShim);
michael@0:         this._loadPaymentShim = null;
michael@0:       }
michael@0:     }).bind(this);
michael@0:     SystemAppProxy.addEventListener("mozContentEvent", this._loadPaymentShim);
michael@0: 
michael@0:     // We also listen for UI notifications about a closed payment flow. The UI
michael@0:     // should provide the reason of the closure within the 'errorMsg' parameter
michael@0:     this._notifyPayFlowClosed = (function _notifyPayFlowClosed(evt) {
michael@0:       let msg = evt.detail;
michael@0:       if (msg.id != id) {
michael@0:         return;
michael@0:       }
michael@0: 
michael@0:       if (msg.type != 'cancel') {
michael@0:         return;
michael@0:       }
michael@0: 
michael@0:       if (msg.errorMsg) {
michael@0:         _error(msg.errorMsg);
michael@0:       }
michael@0:       SystemAppProxy.removeEventListener("mozContentEvent",
michael@0:                                          this._notifyPayFlowClosed);
michael@0:       this._notifyPayFlowClosed = null;
michael@0:     }).bind(this);
michael@0:     SystemAppProxy.addEventListener("mozContentEvent",
michael@0:                                this._notifyPayFlowClosed);
michael@0: 
michael@0:     SystemAppProxy.dispatchEvent(detail);
michael@0:   },
michael@0: 
michael@0:   cleanup: function cleanup() {
michael@0:     if (this._handleSelection) {
michael@0:       SystemAppProxy.removeEventListener("mozContentEvent", this._handleSelection);
michael@0:       this._handleSelection = null;
michael@0:     }
michael@0: 
michael@0:     if (this._notifyPayFlowClosed) {
michael@0:       SystemAppProxy.removeEventListener("mozContentEvent", this._notifyPayFlowClosed);
michael@0:       this._notifyPayFlowClosed = null;
michael@0:     }
michael@0: 
michael@0:     if (this._loadPaymentShim) {
michael@0:       SystemAppProxy.removeEventListener("mozContentEvent", this._loadPaymentShim);
michael@0:       this._loadPaymentShim = null;
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   getRandomId: function getRandomId() {
michael@0:     return uuidgen.generateUUID().toString();
michael@0:   },
michael@0: 
michael@0:   LOG: function LOG(s) {
michael@0:     if (!this._debug) {
michael@0:       return;
michael@0:     }
michael@0:     dump("-*- PaymentGlue: " + s + "\n");
michael@0:   },
michael@0: 
michael@0:   classID: Components.ID("{8b83eabc-7929-47f4-8b48-4dea8d887e4b}"),
michael@0: 
michael@0:   QueryInterface: XPCOMUtils.generateQI([Ci.nsIPaymentUIGlue])
michael@0: }
michael@0: 
michael@0: this.NSGetFactory = XPCOMUtils.generateNSGetFactory([PaymentUI]);