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/* 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");
Cu.import("resource://gre/modules/Promise.jsm");
// Type of MozChromEvents to handle payment dialogs.
const kOpenPaymentConfirmationEvent = "open-payment-confirmation-dialog";
const kOpenPaymentFlowEvent = "open-payment-flow-dialog";
const kClosePaymentFlowEvent = "close-payment-flow-dialog";
// Observer notification topic for payment flow cancelation.
const kPaymentFlowCancelled = "payment-flow-cancelled";
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 = (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
};
this._setPaymentRequest = (event) => {
let message = event.detail;
if (message.id != id) {
return;
}
let frame = message.frame;
let docshell = frame.contentWindow
.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIWebNavigation)
.QueryInterface(Ci.nsIDocShell);
docshell.paymentRequestId = aRequestId;
frame.src = aPaymentFlowInfo.uri + aPaymentFlowInfo.jwt;
SystemAppProxy.removeEventListener("mozContentEvent",
this._setPaymentRequest);
};
SystemAppProxy.addEventListener("mozContentEvent",
this._setPaymentRequest);
// We listen for UI notifications about a closed payment flow. The UI
// should provide the reason of the closure within the 'errorMsg' parameter
this._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;
Services.obs.notifyObservers(null, kPaymentFlowCancelled, null);
};
SystemAppProxy.addEventListener("mozContentEvent",
this._notifyPayFlowClosed);
SystemAppProxy.dispatchEvent(detail);
},
closePaymentFlow: function(aRequestId) {
return new Promise((aResolve) => {
// After receiving the payment provider confirmation about the
// successful or failed payment flow, we notify the UI to close the
// payment flow dialog and return to the caller application.
let id = kClosePaymentFlowEvent + "-" + uuidgen.generateUUID().toString();
let detail = {
type: kClosePaymentFlowEvent,
id: id,
requestId: aRequestId
};
// In order to avoid race conditions, we wait for the UI to notify that
// it has successfully closed the payment flow and has recovered the
// caller app, before notifying the parent process to fire the success
// or error event over the DOMRequest.
SystemAppProxy.addEventListener("mozContentEvent",
(function closePaymentFlowReturn() {
SystemAppProxy.removeEventListener("mozContentEvent",
closePaymentFlowReturn);
this.cleanup();
aResolve();
}).bind(this));
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;
}
},
getRandomId: function getRandomId() {
return uuidgen.generateUUID().toString();
},
classID: Components.ID("{8b83eabc-7929-47f4-8b48-4dea8d887e4b}"),
QueryInterface: XPCOMUtils.generateQI([Ci.nsIPaymentUIGlue])
}
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([PaymentUI]);
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