web/src/services/webPlatformUtils.service.ts

import Swal, { SweetAlertIcon } from 'sweetalert2';

import { DeviceType } from 'jslib-common/enums/deviceType';
import { ThemeType } from 'jslib-common/enums/themeType';

import { I18nService } from 'jslib-common/abstractions/i18n.service';
import { LogService } from 'jslib-common/abstractions/log.service';
import { MessagingService } from 'jslib-common/abstractions/messaging.service';
import { PlatformUtilsService } from 'jslib-common/abstractions/platformUtils.service';
import { StateService } from 'jslib-common/abstractions/state.service';

export class WebPlatformUtilsService implements PlatformUtilsService {
    identityClientId: string = 'web';

    private browserCache: DeviceType = null;
    private prefersColorSchemeDark = window.matchMedia('(prefers-color-scheme: dark)');

    constructor(private i18nService: I18nService, private messagingService: MessagingService,
        private logService: LogService, private stateService: StateService) { }

    getDevice(): DeviceType {
        if (this.browserCache != null) {
            return this.browserCache;
        }

        if (navigator.userAgent.indexOf(' Firefox/') !== -1 || navigator.userAgent.indexOf(' Gecko/') !== -1) {
            this.browserCache = DeviceType.FirefoxBrowser;
        } else if (navigator.userAgent.indexOf(' OPR/') >= 0) {
            this.browserCache = DeviceType.OperaBrowser;
        } else if (navigator.userAgent.indexOf(' Edg/') !== -1) {
            this.browserCache = DeviceType.EdgeBrowser;
        } else if (navigator.userAgent.indexOf(' Vivaldi/') !== -1) {
            this.browserCache = DeviceType.VivaldiBrowser;
        } else if (navigator.userAgent.indexOf(' Safari/') !== -1 && navigator.userAgent.indexOf('Chrome') === -1) {
            this.browserCache = DeviceType.SafariBrowser;
        } else if ((window as any).chrome && navigator.userAgent.indexOf(' Chrome/') !== -1) {
            this.browserCache = DeviceType.ChromeBrowser;
        } else if (navigator.userAgent.indexOf(' Trident/') !== -1) {
            this.browserCache = DeviceType.IEBrowser;
        } else {
            this.browserCache = DeviceType.UnknownBrowser;
        }

        return this.browserCache;
    }

    getDeviceString(): string {
        const device = DeviceType[this.getDevice()].toLowerCase();
        return device.replace('browser', '');
    }

    isFirefox(): boolean {
        return this.getDevice() === DeviceType.FirefoxBrowser;
    }

    isChrome(): boolean {
        return this.getDevice() === DeviceType.ChromeBrowser;
    }

    isEdge(): boolean {
        return this.getDevice() === DeviceType.EdgeBrowser;
    }

    isOpera(): boolean {
        return this.getDevice() === DeviceType.OperaBrowser;
    }

    isVivaldi(): boolean {
        return this.getDevice() === DeviceType.VivaldiBrowser;
    }

    isSafari(): boolean {
        return this.getDevice() === DeviceType.SafariBrowser;
    }

    isIE(): boolean {
        return this.getDevice() === DeviceType.IEBrowser;
    }

    isMacAppStore(): boolean {
        return false;
    }

    isViewOpen(): Promise<boolean> {
        return Promise.resolve(false);
    }

    launchUri(uri: string, options?: any): void {
        const a = document.createElement('a');
        a.href = uri;
        if (options == null || !options.sameWindow) {
            a.target = '_blank';
            a.rel = 'noreferrer noopener';
        }
        a.classList.add('d-none');
        document.body.appendChild(a);
        a.click();
        document.body.removeChild(a);
    }

    saveFile(win: Window, blobData: any, blobOptions: any, fileName: string): void {
        let blob: Blob = null;
        let type: string = null;
        const fileNameLower = fileName.toLowerCase();
        let doDownload = true;
        if (fileNameLower.endsWith('.pdf')) {
            type = 'application/pdf';
            doDownload = false;
        } else if (fileNameLower.endsWith('.xlsx')) {
            type = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
        } else if (fileNameLower.endsWith('.docx')) {
            type = 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
        } else if (fileNameLower.endsWith('.pptx')) {
            type = 'application/vnd.openxmlformats-officedocument.presentationml.presentation';
        } else if (fileNameLower.endsWith('.csv')) {
            type = 'text/csv';
        } else if (fileNameLower.endsWith('.png')) {
            type = 'image/png';
        } else if (fileNameLower.endsWith('.jpg') || fileNameLower.endsWith('.jpeg')) {
            type = 'image/jpeg';
        } else if (fileNameLower.endsWith('.gif')) {
            type = 'image/gif';
        }
        if (type != null) {
            blobOptions = blobOptions || {};
            if (blobOptions.type == null) {
                blobOptions.type = type;
            }
        }
        if (blobOptions != null && !this.isIE()) {
            blob = new Blob([blobData], blobOptions);
        } else {
            blob = new Blob([blobData]);
        }
        if (navigator.msSaveOrOpenBlob) {
            navigator.msSaveBlob(blob, fileName);
        } else {
            const a = win.document.createElement('a');
            if (doDownload) {
                a.download = fileName;
            } else if (!this.isSafari()) {
                a.target = '_blank';
            }
            a.href = URL.createObjectURL(blob);
            a.style.position = 'fixed';
            win.document.body.appendChild(a);
            a.click();
            win.document.body.removeChild(a);
        }
    }

    getApplicationVersion(): Promise<string> {
        return Promise.resolve(process.env.APPLICATION_VERSION || '-');
    }

    supportsWebAuthn(win: Window): boolean {
        return (typeof (PublicKeyCredential) !== 'undefined');
    }

    supportsDuo(): boolean {
        return true;
    }

    showToast(type: 'error' | 'success' | 'warning' | 'info', title: string, text: string | string[],
        options?: any): void {
        this.messagingService.send('showToast', {
            text: text,
            title: title,
            type: type,
            options: options,
        });
    }

    async showDialog(body: string, title?: string, confirmText?: string, cancelText?: string, type?: string,
        bodyIsHtml: boolean = false) {
        let iconClasses: string = null;
        if (type != null) {
            // If you add custom types to this part, the type to SweetAlertIcon cast below needs to be changed.
            switch (type) {
                case 'success':
                    iconClasses = 'fa-check text-success';
                    break;
                case 'warning':
                    iconClasses = 'fa-warning text-warning';
                    break;
                case 'error':
                    iconClasses = 'fa-bolt text-danger';
                    break;
                case 'info':
                    iconClasses = 'fa-info-circle text-info';
                    break;
                default:
                    break;
            }
        }

        const bootstrapModal = document.querySelector('div.modal');
        if (bootstrapModal != null) {
            bootstrapModal.removeAttribute('tabindex');
        }

        const iconHtmlStr = iconClasses != null ? `<i class="swal-custom-icon fa ${iconClasses}"></i>` : undefined;
        const confirmed = await Swal.fire({
            heightAuto: false,
            buttonsStyling: false,
            icon: type as SweetAlertIcon, // required to be any of the SweetAlertIcons to output the iconHtml.
            iconHtml: iconHtmlStr,
            text: bodyIsHtml ? null : body,
            html: bodyIsHtml ? body : null,
            titleText: title,
            showCancelButton: (cancelText != null),
            cancelButtonText: cancelText,
            showConfirmButton: true,
            confirmButtonText: confirmText == null ? this.i18nService.t('ok') : confirmText,
        });

        if (bootstrapModal != null) {
            bootstrapModal.setAttribute('tabindex', '-1');
        }

        return confirmed.value;
    }

    isDev(): boolean {
        return process.env.NODE_ENV === 'development';
    }

    isSelfHost(): boolean {
        return process.env.ENV.toString() === 'selfhosted';
    }

    copyToClipboard(text: string, options?: any): void | boolean {
        let win = window;
        let doc = window.document;
        if (options && (options.window || options.win)) {
            win = options.window || options.win;
            doc = win.document;
        } else if (options && options.doc) {
            doc = options.doc;
        }
        if ((win as any).clipboardData && (win as any).clipboardData.setData) {
            // IE specific code path to prevent textarea being shown while dialog is visible.
            (win as any).clipboardData.setData('Text', text);
        } else if (doc.queryCommandSupported && doc.queryCommandSupported('copy')) {
            const textarea = doc.createElement('textarea');
            textarea.textContent = text;
            // Prevent scrolling to bottom of page in MS Edge.
            textarea.style.position = 'fixed';
            let copyEl = doc.body;
            // For some reason copy command won't work when modal is open if appending to body
            if (doc.body.classList.contains('modal-open')) {
                copyEl = doc.body.querySelector<HTMLElement>('.modal');
            }
            copyEl.appendChild(textarea);
            textarea.select();
            let success = false;
            try {
                // Security exception may be thrown by some browsers.
                success = doc.execCommand('copy');
                if (!success) {
                    this.logService.debug('Copy command unsupported or disabled.');
                }
            } catch (e) {
                // tslint:disable-next-line
                console.warn('Copy to clipboard failed.', e);
            } finally {
                copyEl.removeChild(textarea);
            }
            return success;
        }
    }

    readFromClipboard(options?: any): Promise<string> {
        throw new Error('Cannot read from clipboard on web.');
    }

    supportsBiometric() {
        return Promise.resolve(false);
    }

    authenticateBiometric() {
        return Promise.resolve(false);
    }

    supportsSecureStorage() {
        return false;
    }

    getDefaultSystemTheme(): Promise<ThemeType.Light | ThemeType.Dark> {
        return Promise.resolve(this.prefersColorSchemeDark.matches ? ThemeType.Dark : ThemeType.Light);
    }

    async getEffectiveTheme(): Promise<ThemeType.Light | ThemeType.Dark> {
        const theme = await this.stateService.getTheme();
        if (theme === ThemeType.Dark) {
            return ThemeType.Dark;
        } else if (theme === ThemeType.System) {
            return this.getDefaultSystemTheme();
        } else {
            return ThemeType.Light;
        }
    }

    onDefaultSystemThemeChange(callback: ((theme: ThemeType.Light | ThemeType.Dark) => unknown)) {
        try {
            this.prefersColorSchemeDark.addEventListener('change', ({ matches }) => {
                callback(matches ? ThemeType.Dark : ThemeType.Light);
            });
        } catch (e) {
            // Safari older than v14
            this.prefersColorSchemeDark.addListener(ev => {
                callback(ev.matches ? ThemeType.Dark : ThemeType.Light);
            });
        }
    }
}