/// <reference path="./mathcoach-api.d.ts"/>
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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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* Kontext-Datei auf Aufgaben-Datei abbilden.
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* Beispiel: "/path/to/myExercise.mcq.json" zu "/path/to/myExercise.groovy"
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*/
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export function contextFileToExerciseFile(contextFile: MathCoach.File): MathCoach.File {
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if (contextFile) {
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if (!contextFile.owner || !(typeof contextFile.owner === "string") || !(contextFile.owner.trim() === "")) {
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throw new Error("Context file has no valid 'owner' property.");
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}
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if (!contextFile.part || !(typeof contextFile.part === "string")) {
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if (contextFile.part !== "vfs" && contextFile.part !== "www") {
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throw new Error("Context file has no valid 'part' property. Allowed values are 'vfs' and 'www'.");
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}
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}
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if (!contextFile.path || !(typeof contextFile.path === "string") || !(contextFile.owner.trim().startsWith("/"))) {
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throw new Error("Context file has no valid 'path' property.");
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}
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} else {
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throw new Error("No context file object given.")
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}
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let file: MathCoach.File = {
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part: contextFile.part,
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owner: contextFile.owner,
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path: contextFile.path.split(".")[0] + ".groovy"
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};
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return file;
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}
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