/// <reference path="../mathcoach-api.d.ts"/>
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namespace MathCoach {
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export namespace Ide {
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/**
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* Offline MathCoach-API falls notwendig bereitstellen. Dabei wird das Dateisystem durch den
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* LocalStorage des Browsers implementiert - einige Features der IDE (beispielsweise
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* der Navigator) sind nicht verfügbar und führen keine Aktionen durch.
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*
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* **Hinweis**: Wenn die echte MathCoach-API der IDE verfügbar ist, hat der Aufruf
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* dieser Funktion keinen Seiteneffekt.
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*
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* @param contextFileExtension Datei-Erweiterung der Kontext-Datei
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*
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*/
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export function enableOfflineUsageIfNecessary(contextFileExtension: string = "dummy.json"): boolean {
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const fileIdentifier = (file: MathCoach.File) => `mock-file://${file.owner}@${file.part}/${file.path}`;
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const traceMethod = (method: string, args?: any[]) => console.log(["[MC MOCK API]", " ", method, "(", (args ? args : [""]).join(","), ")"].join(""));
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class MockAPI implements MathCoach.Api {
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public ide: MathCoach.IdeApi = {
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async getContextFile(): Promise<MathCoach.File> {
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traceMethod("MC.ide.getContextFile");
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return {
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owner: "jdoe",
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path: `/file.${contextFileExtension}`,
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part: "vfs"
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}
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},
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async getUserName(): Promise<string> {
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traceMethod("MC.ide.getUserName");
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return "jdoe"
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},
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fs: {
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async readFile(file: MathCoach.File) {
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traceMethod("MC.ide.fs.readFile", [JSON.stringify(file)]);
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return localStorage.getItem(fileIdentifier(file)) || "";
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},
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async writeFile(file: MathCoach.File, text: string) {
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traceMethod("MC.ide.fs.writeFile", [JSON.stringify(file), JSON.stringify(`...${text.length} chars...`)]);
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return localStorage.setItem(fileIdentifier(file), text);
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}
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},
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navigator: {
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async navigateTo(link: string, forceOpen?: boolean) {
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traceMethod("MC.ide.navigator.navigateTo", [JSON.stringify(link), JSON.stringify(forceOpen ? true : false)]);
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},
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async navigateToExercise(file: MathCoach.File, forceOpen?: boolean) {
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traceMethod("MC.ide.navigator.navigateToExercise", [JSON.stringify(file), JSON.stringify(forceOpen ? true : false)]);
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}
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}
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};
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public async isReady(): Promise<boolean> {
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traceMethod("MC.isReady()");
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return true;
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}
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}
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if (typeof MC === "undefined") {
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console.warn("you are offline - offline api is used");
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(window as any).MC = new MockAPI(); // fake the MathCoach-API
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return true;
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} else {
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return false;
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}
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}
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}
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}
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