media.js

var dialogs = require('alloy/dialogs');

function editPermissions(e) {

	if (OS_IOS) {
		Ti.Platform.openURL(Ti.App.iOS.applicationOpenSettingsURL);
	}

	if (OS_ANDROID) {
		var intent = Ti.Android.createIntent({
			action: 'android.settings.APPLICATION_SETTINGS',
		});
		intent.addFlags(Ti.Android.FLAG_ACTIVITY_NEW_TASK);
		Ti.Android.currentActivity.startActivity(intent);
	}
}

function showDialog() {
	var resp = dialogs.confirm({
		title: 'You denied permission for camera',
		message: 'SEC³URE requested permission for camera. Press Yes to open the App Settings to grant permission there.',
		callback: editPermissions
	});
}

exports.hasPermissions = function() {

	// This is now the cross-platform way to check permissions.
	// The above is still useful as it provides the reason of denial.
	var hasCameraPermissions = Ti.Media.hasCameraPermissions();

	return hasCameraPermissions;
};

exports.requestPermissions = function(callback) {

	// On iOS we can get information on the reason why we might not have permission
	if (OS_IOS) {

		// Map constants to names
		var map = {};
		map[Ti.Media.CAMERA_AUTHORIZATION_AUTHORIZED] = 'CAMERA_AUTHORIZATION_AUTHORIZED';
		map[Ti.Media.CAMERA_AUTHORIZATION_DENIED] = 'CAMERA_AUTHORIZATION_DENIED';
		map[Ti.Media.CAMERA_AUTHORIZATION_RESTRICTED] = 'CAMERA_AUTHORIZATION_RESTRICTED';
		map[Ti.Media.CAMERA_AUTHORIZATION_UNKNOWN] = 'CAMERA_AUTHORIZATION_UNKNOWN';

		var cameraAuthorizationStatus = Ti.Media.cameraAuthorization;

		if (cameraAuthorizationStatus === Ti.Media.CAMERA_AUTHORIZATION_RESTRICTED || cameraAuthorizationStatus === Ti.Media.CAMERA_AUTHORIZATION_DENIED) {
			showDialog();
		}
	}

	Ti.Media.requestCameraPermissions(function(e) {
		if (e.success) {
			callback(true);
		} else {
			showDialog();
		}
	});
};