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feat(scan): implement permission priming in scanService

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This commit is contained in:
Jason Dreyzehner 2016-10-10 22:59:35 -04:00
commit f41c56ba04
3 changed files with 143 additions and 25 deletions
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81
src/js/services/scannerService.js
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@ -1,6 +1,6 @@
'use strict';
angular.module('copayApp.services').service('scannerService', function($log, $timeout, platformInfo) {
angular.module('copayApp.services').service('scannerService', function($log, $timeout, platformInfo, $rootScope) {
var isDesktop = !platformInfo.isCordova;
var QRScanner = window.QRScanner;
@ -8,21 +8,40 @@ angular.module('copayApp.services').service('scannerService', function($log, $ti
var backCamera = true; // the plugin defaults to the back camera
// Initalize known capabilities
var isAvailable = false;
var hasPermission = isDesktop? true: false;
var isAuthorized = false;
var isDenied = false;
var isRestricted = false;
var canEnableLight = false;
var canChangeCamera = false;
var canOpenSettings = false;
function _checkCapabilities(status){
$log.debug('scannerService is reviewing platform capabilities...');
// Permission can be assumed on the desktop builds
hasPermission = (isDesktop || status.authorized)? true: false;
isDenied = status.denied? true : false;
isRestricted = status.restricted? true : false;
canEnableLight = status.canEnableLight? true : false;
canChangeCamera = status.canChangeCamera? true : false;
function orIsNot(bool){
canOpenSettings = status.canOpenSettings? true : false;
_logCapabilities();
}
function _logCapabilities(){
function _orIsNot(bool){
return bool? '' : 'not ';
}
$log.debug('A light is ' + orIsNot(canEnableLight) + 'available on this platform.');
$log.debug('A second camera is ' + orIsNot(canChangeCamera) + 'available on this platform.');
$log.debug('A camera is ' + _orIsNot(isAvailable) + 'available to this app.');
var access = 'not authorized';
if(hasPermission) access = 'authorized';
if(isDenied) access = 'denied';
if(isRestricted) access = 'restricted';
$log.debug('Camera access is ' + access + '.');
$log.debug('Support for opening device settings is ' + _orIsNot(canOpenSettings) + 'available on this platform.');
$log.debug('A light is ' + _orIsNot(canEnableLight) + 'available on this platform.');
$log.debug('A second camera is ' + _orIsNot(canChangeCamera) + 'available on this platform.');
}
/**
@ -30,9 +49,13 @@ angular.module('copayApp.services').service('scannerService', function($log, $ti
*/
this.getCapabilities = function(){
return {
isAvailable: isAvailable,
hasPermission: hasPermission,
isDenied: isDenied,
isRestricted: isRestricted,
canEnableLight: canEnableLight,
canChangeCamera: canChangeCamera
canChangeCamera: canChangeCamera,
canOpenSettings: canOpenSettings
}
}
@ -50,7 +73,7 @@ angular.module('copayApp.services').service('scannerService', function($log, $ti
_checkCapabilities(status);
if(status.authorized){
$log.debug('Camera permission already granted.');
_initalize();
_initalize(callback);
} else {
$log.debug('QRScanner not authorized, waiting to initalize.');
if(typeof callback === "function"){
@ -60,23 +83,43 @@ angular.module('copayApp.services').service('scannerService', function($log, $ti
});
} else {
$log.debug('Camera permission assumed on desktop.');
_initalize();
}
function _initalize(){
$log.debug('Preparing scanner...');
QRScanner.prepare(function(err, status){
if(err){
$log.error(err);
}
_checkCapabilities(status);
callback && callback(status);
});
_initalize(callback);
}
};
function _initalize(callback){
$log.debug('Initializing scanner...');
QRScanner.prepare(function(err, status){
if(err){
$log.error(err);
// does not return `status` if there is an error
QRScanner.getStatus(function(status){
_completeInitialization(status, callback);
});
} else {
isAvailable = true;
_completeInitialization(status, callback);
}
});
}
// This could be much cleaner with a Promise API
// (needs a polyfill for some platforms)
var initializeCompleted = false;
function _completeInitialization(status, callback){
_checkCapabilities(status);
$rootScope.$emit('scannerServiceInitialized');
initializeCompleted = true;
callback && callback(status);
}
this.isInitialized = function(){
return initializeCompleted;
}
var nextHide = null;
var nextDestroy = null;
var hideAfterSeconds = 15;
var hideAfterSeconds = 10;
var destroyAfterSeconds = 5 * 60;
/**
@ -121,7 +164,7 @@ angular.module('copayApp.services').service('scannerService', function($log, $ti
*/
this.deactivate = function(callback) {
$log.debug('Deactivating scanner...');
QRScanner.cancelScan();
// QRScanner.cancelScan();
nextHide = $timeout(_hide, hideAfterSeconds * 1000);
nextDestroy = $timeout(_destroy, destroyAfterSeconds * 1000);
};