PackageHelper/www/assets/js/platform.js

/*
 * 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/.
 */

var platform_type = "";

var platform_theme = "md";

var app_version = "unknown";

var nw_tray = null;

var openBrowser = function (url) {
    window.open(url);
}

var openSystemBrowser = function (url) {
    window.open(url);
}

var scanBarcode = function (success, error) {
    app.dialog.alert("You can't scan barcodes with this device.", "Sorry!");
}

var getLocation = function (success, error) {
    if ("geolocation" in navigator) {
        navigator.geolocation.getCurrentPosition(function (position) {
            success(position);
        }, function (err) {
            if (typeof error == "function") {
                error(err.message);
            }
        }, {
            enableHighAccuracy: true,
            timeout: 5000,
            maximumAge: 0
        });
    } else {
        if (typeof error == "function") {
            error("Location is unavailable.");
        }
    }
}

var watchLocation = function (success, error) {
    if ("geolocation" in navigator) {
        navigator.geolocation.watchPosition(function (position) {
            success(position);
        }, function (err) {
            if (typeof error == "function") {
                error(err.message);
            }
        }, {
            enableHighAccuracy: true,
            timeout: 5000,
            maximumAge: 0
        });
    } else {
        if (typeof error == "function") {
            error("Location is unavailable.");
        }
    }
}

function setupHTML5BarcodeScanner() {
    $("body").append('<script src="node_modules/@zxing/library/umd/index.min.js"></script>');

    scanBarcode = function (success, error) {
        $("#web-barcode-ui").removeClass("hidden");
        // Stolen from https://zxing-js.github.io/library/examples/multi-camera/
        const codeReader = new ZXing.BrowserMultiFormatReader();
        console.log('ZXing code reader initialized');
        codeReader.getVideoInputDevices()
                .then((videoInputDevices) => {
                    if (videoInputDevices.length == 0) {
                        codeReader.reset();
                        $("#web-barcode-ui").addClass("hidden");
                        error("A camera is required to scan barcodes.");
                        return;
                    }
                    selectedDeviceId = videoInputDevices[0].deviceId;

                    codeReader.decodeFromInputVideoDeviceContinuously(selectedDeviceId, 'barcode-viewer', (result, err) => {
                        if (result) {
                            console.log(result);
                            codeReader.reset();
                            $("#web-barcode-ui").addClass("hidden");
                            success(result.text);
                            return;
                        }
                        if (err && !(err instanceof ZXing.NotFoundException)) {
                            console.error(err);
                            codeReader.reset();
                            $("#web-barcode-ui").addClass("hidden");
                            error(err);
                            return;
                        }
                    });
                })
                .catch((err) => {
                    console.error(err);
                });
        $("#web-barcode-ui").on("click", function () {
            codeReader.reset();
            $("#web-barcode-ui").addClass("hidden");
        });
    };
}

function initCordova() {
    platform_type = "cordova";
    // Handle back button to close things
    document.addEventListener("backbutton", function (event) {
        router.back({force: true, ignoreCache: true});
    }, false);
    document.addEventListener("deviceready", function () {
        if (localStorage.getItem("wakelock") == "true") {
            window.powerManagement.acquire(function () {
                console.log('Wakelock acquired');
            }, function () {
                console.log('Failed to acquire wakelock');
            });
        } else {
            window.powerManagement.release(function () {
                console.log('Wakelock released');
            }, function () {
                console.log('Failed to release wakelock');
            });
        }
    }, false);
    openBrowser = function (url) {
        cordova.InAppBrowser.open(url, '_blank', 'location=yes');
    }

    openExternalBrowser = function (url) {
        window.open(url, '_system', '');
    }

    if (typeof device != "undefined" && device.platform != "browser") {
        scanBarcode = function (success, error) {
            cordova.plugins.barcodeScanner.scan(
                    function (result) {
                        if (!result.cancelled) {
                            success(result.text);
                        }
                    },
                    function (err) {
                        if (typeof error == "function") {
                            error(err);
                        }
                    },
                    {
                        showTorchButton: true,
                        showFlipCameraButton: true,
                        prompt: "Scan barcode",
                        resultDisplayDuration: 0,
                        disableSuccessBeep: true,
                        formats: "QR_CODE,DATA_MATRIX,CODE_39,CODE_93,CODE_128,CODABAR,PDF_417,AZTEC,MAXICODE"
                    }
            );
        };
    } else {
        setupHTML5BarcodeScanner();
    }
}

function initNW() {
    platform_type = "nw";
    platform_theme = "md";
    openBrowser = function (url) {
        nw.Window.open(url, {
            id: url
        }, function (browserwin) {
            // Add menubar so the user can navigate around if they click a link
            var browsermenu = new nw.Menu({type: 'menubar'});
            browsermenu.append(new nw.MenuItem({
                label: "Back",
                click: function () {
                    browserwin.window.history.back();
                }
            }));
            browsermenu.append(new nw.MenuItem({
                label: "Forward",
                click: function () {
                    browserwin.window.history.forward();
                }
            }));
            browsermenu.append(new nw.MenuItem({
                label: "Home",
                click: function () {
                    browserwin.window.location.href = url;
                }
            }));
            browserwin.menu = browsermenu;
        });
    }

    openExternalBrowser = function (url) {
        require('nw.gui').Shell.openExternal(url);
    }


    setupHTML5BarcodeScanner();
}

function initBrowser() {
    platform_type = "browser";
    platform_theme = "md";
    openBrowser = function (url) {
        window.open(url);
    }

    openExternalBrowser = function (url) {
        window.open(url);
    }

    setupHTML5BarcodeScanner();
}

function initPlatform() {
    if (typeof cordova !== 'undefined') {
        initCordova();
    } else if (typeof nw !== 'undefined') {
        initNW();
    } else {
        initBrowser();
    }

    $.getJSON("package.json", function (data) {
        app_version = data.version;
    });
}