gecko-dev/b2g/components/PaymentGlue.js

209 lines
6.8 KiB
JavaScript

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