Improve architecture
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190663a253
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511C112F1331BBB4
15
index.html
15
index.html
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@ -12,9 +12,20 @@
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<tr><th>Username</th><td><input type="text" id="username"/></td></tr>
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<tr><th>Password</th><td><input type="password" id="password"/></td></tr>
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</table>
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<input type="button" onclick="this.disabled = true; this.value = 'Logging in...'; logIn(); return false" value="Log in"/><br/>
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<input type="button" onclick="this.disabled = true; this.value = 'Validating token'; validateToken(); return false" id="validate" value="Validate token"/> </input>(ignores username and password)
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<input type="button" onclick="logIn(); return false" id="login" value="Log in"/>
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<span id="login_message"></span><br/>
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<input type="button" onclick="validateToken(); return false" id="validate" value="Validate token"/>
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<span id="validate_message">(ignores username and password)</span><br/>
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<input type="button" onclick="logOut(); return false" id="logout" value="Log out"/>
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<span id="logout_message"></span><br/>
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</form>
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<pre id="user_json"></pre>
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<script type="text/javascript" src="xhr.js"></script>
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<script type="text/javascript" src="main.js"></script>
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</body>
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198
main.js
198
main.js
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@ -1,7 +1,5 @@
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"use strict";
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const LOCALSTORAGE_KEY_SERVERS = "mattermostServers";
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function byId(id, nullOk=false) {
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const el = document.getElementById(id);
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if (!el && !nullOk) {
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@ -10,57 +8,102 @@ function byId(id, nullOk=false) {
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return el;
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}
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function storeCredentials(endpoint, login_id, token) {
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let storedServers = JSON.parse(window.localStorage.getItem(LOCALSTORAGE_KEY_SERVERS) || "[]");
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if (!(endpoint in storedServers)) storedServers.push(endpoint);
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window.localStorage.setItem(LOCALSTORAGE_KEY_SERVERS, JSON.stringify(storedServers));
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window.localStorage.setItem(`${LOCALSTORAGE_KEY_SERVERS}_${endpoint}`, JSON.stringify({login_id, token}));
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const LOCALSTORAGE_KEY_SERVER = "mattermostServer";
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const RE_SERVER_ITEM = new RegExp(`^${LOCALSTORAGE_KEY_SERVER}_(.*)\$`, "").compile();
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class Storage {
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getServers() {
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let servers = [];
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for (var i = 0; i < window.localStorage.length; i++) {
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const key = window.localStorage.key(i);
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const matches = key.match(RE_SERVER_ITEM);
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if (matches) {
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servers.push(matches[1]);
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}
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}
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return servers;
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}
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_key_for(endpoint) {
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return `${LOCALSTORAGE_KEY_SERVER}_${endpoint}`;
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}
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clear(endpoint) {
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window.localStorage.removeItem(this._key_for(endpoint));
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}
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store(endpoint, login_id, token) {
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window.localStorage.setItem(this._key_for(endpoint), JSON.stringify({login_id, token}));
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}
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get(endpoint) {
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return JSON.parse(window.localStorage.getItem(this._key_for(endpoint)) || "null");
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}
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}
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function getCredentials(endpoint) {
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return JSON.parse(window.localStorage.getItem(`${LOCALSTORAGE_KEY_SERVERS}_${endpoint}`) || "null");
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}
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class MattermostApi {
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constructor(endpoint) {
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this.endpoint = endpoint;
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this._endpoint = endpoint;
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}
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async validateToken(token) {
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const response = await ajax.getJson(`${this.endpoint}/users/me`, {
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headers: {
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"Authorization": `Bearer ${token}`
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}
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});
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get id() {
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return this._endpoint;
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}
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async get(path, token) {
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const headers = token ? {"Authorization": `Bearer ${token}`} : {};
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const response = await ajax.getJson(`${this._endpoint}${path}`, {headers});
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if (!response.ok) {
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throw response;
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}
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return response;
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}
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logIn(login_id, password) {
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return ajax.postJson(`${this.endpoint}/users/login`, {login_id, password})
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.then(response => {
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let token = response.getHeader("Token");
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storeCredentials(this.endpoint, login_id, token);
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return response;
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})
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.then(response => {
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document.body.innerHTML = "";
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const pre = document.createElement("pre");
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pre.innerText = JSON.stringify(response.json, null, 2);
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document.body.appendChild(pre);
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return response;
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})
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.catch(error => {
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console.error(error);
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document.body.innerText = `An error occurred: ${error}`;
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});
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async post(path, data, token) {
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const headers = token ? {"Authorization": `Bearer ${token}`} : {};
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const response = await ajax.postJson(`${this._endpoint}${path}`, data, {headers});
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if (!response.ok) {
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throw response;
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}
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return response;
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}
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}
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class MattermostClient {
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constructor (api, storage) {
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this.api = api;
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this.storage = storage;
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}
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async logIn(login_id, password) {
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const response = await this.api.post("/users/login", {login_id, password});
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const token = response.getResponseHeader("Token");
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if (!token) {
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throw Error("No Token header in response to log in request");
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}
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this.storage.store(this.api.id, login_id, token);
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return response.responseJson;
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}
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async logOut() {
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const response = await this.api.post("/users/logout");
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//this.storage.clear(this.api.id);
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return response.responseJson;
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}
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async usersMe() {
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const stored = this.storage.get(this.api.id);
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if (!stored || !stored.token) {
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throw Error("No token stored");
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}
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const response = await this.api.get("/users/me", stored.token);
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return response.responseJson;
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}
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}
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/**
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* Return an endpoint URL that has a protocol, domain and path
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*/
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@ -75,30 +118,81 @@ function normalizedEndpoint(endpoint) {
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return `${protocol}${domain}${path}`;
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}
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function logIn() {
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let endpoint = normalizedEndpoint(byId("server").value);
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function createClient(endpoint) {
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const api = new MattermostApi(normalizedEndpoint(endpoint));
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const storage = new Storage();
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return new MattermostClient(api, storage);
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}
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let api = new MattermostApi(endpoint);
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api.logIn(byId("username").value, byId("password").value);
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function buttonDisable(element, text) {
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element.value = text;
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element.disabled = true;
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}
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function buttonEnable(element, text) {
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element.value = text;
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element.disabled = false;
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}
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function logIn() {
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byId("user_json").innerText = "";
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const client = createClient(byId("server").value);
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buttonDisable(byId("login"), "Logging in...");
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client.logIn(byId("username").value, byId("password").value)
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.then(json => {
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buttonEnable(byId("login"), "Logged in");
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byId("login_message").innerText = "";
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byId("user_json").innerText = JSON.stringify(json, null, 2);
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})
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.catch(error => {
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console.error(error);
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buttonEnable(byId("login"), "Could not log in");
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byId("login_message").innerText = `${error}`;
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});
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}
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function logOut() {
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const client = createClient(byId("server").value);
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buttonDisable(byId("logout"), "Logging out...");
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client.logOut()
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.then(response => {
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buttonEnable(byId("logout"), "Logged out");
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byId("logout_message").innerText = "";
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byId("user_json").innerText = "";
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})
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.catch(error => {
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console.error(error);
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buttonEnable(byId("logout"), "Could not log out");
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byId("logout_message").innerText = `${error}`;
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});
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}
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function validateToken() {
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let endpoint = normalizedEndpoint(byId("server").value);
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byId("user_json").innerText = "";
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let cred = getCredentials(endpoint);
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const client = createClient(byId("server").value);
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buttonDisable(byId("validate"), "Validating token...");
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let cred = client.storage.get(client.api.id);
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if (!cred || !cred.token) {
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byId("validate").value = "No token, log in first";
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byId("validate").disabled = false;
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buttonEnable(byId("validate"), "No token, log in first");
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return;
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}
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let api = new MattermostApi(endpoint);
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api.validateToken(cred.token)
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.then(() => {
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byId("validate").value = "Validation succeeded";
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byId("validate").disabled = false;
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client.usersMe()
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.then(json => {
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buttonEnable(byId("validate"), "Validation succeeded");
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byId("validate_message").innerText = "";
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byId("user_json").innerText = JSON.stringify(json, null, 2);
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})
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.catch(() => {
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byId("validate").value = "Validation failed";
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byId("validate").disabled = false;
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.catch(error => {
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console.error(error);
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buttonEnable(byId("validate"), "Validation failed");
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byId("validate_message").innerText = `${error}`;
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});
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}
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59
xhr.js
59
xhr.js
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@ -1,8 +1,15 @@
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const ajax = (function() { "use strict";
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class NetworkError extends Error {}
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class UnexpectedMimeError extends Error {}
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class InvalidJsonError extends Error {}
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class AjaxError extends Error {
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constructor (message, response, ...rest) {
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super(message, ...rest);
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this.response = response;
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}
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}
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class NetworkError extends AjaxError {}
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class NotOkError extends AjaxError {}
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class UnexpectedMimeError extends AjaxError {}
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class InvalidJsonError extends AjaxError {}
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const MIME_JSON = "application/json";
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@ -33,34 +40,32 @@ function xhrInitForPromise(resolve, reject, url, method, headers) {
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}
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function xhrParseJsonResponse(xhr) {
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if (xhr.status === 0) {
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console.error(xhr);
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throw new NetworkError("Failed to connect to server");
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}
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xhr.responseJson = null;
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xhr.ok = false;
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let json;
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if (!xhr.responseText) {
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json = null;
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} else {
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if (xhr.responseText) {
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const contentType = xhr.getResponseHeader("Content-Type");
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if (contentType != MIME_JSON) {
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throw new UnexpectedMimeError(`Server did not reply with JSON but with ${contentType}`);
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throw new UnexpectedMimeError(`Server did not reply with JSON but with ${contentType}`, xhr);
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}
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try {
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json = JSON.parse(xhr.responseText);
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xhr.responseJson = JSON.parse(xhr.responseText);
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} catch(e) {
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throw new InvalidJsonError();
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throw new InvalidJsonError("Server replied with JSON that we couldn't parse", xhr);
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}
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}
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return {
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ok: 200 <= xhr.status && xhr.status < 300,
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status: xhr.status,
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statusText: xhr.statusText,
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getHeader: header => xhr.getResponseHeader(header),
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json,
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xhr,
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};
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xhr.ok = 200 <= xhr.status && xhr.status < 300;
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if (!xhr.ok) {
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console.error(xhr);
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if (xhr.status === 0) {
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throw new NetworkError("Failed to connect to server. Developer console may have more information", xhr);
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} else {
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throw new NotOkError(xhr.statusText, xhr);
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}
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}
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return xhr;
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}
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function getJson(url, options={}) {
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@ -73,7 +78,7 @@ function getJson(url, options={}) {
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}).then(xhrParseJsonResponse);
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}
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function postJson(url, data={}, options={}) {
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function postJson(url, data=undefined, options={}) {
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if (!options.headers) options.headers = {};
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// This triggers CORS, which is not acceptable
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//options.headers["Content-Type"] = MIME_JSON;
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@ -81,12 +86,16 @@ function postJson(url, data={}, options={}) {
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return new Promise((resolve, reject) => {
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let xhr = xhrInitForPromise(resolve, reject, url, "POST", options.headers);
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xhr.send(JSON.stringify(data));
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if (data === undefined) {
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xhr.send();
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} else {
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xhr.send(JSON.stringify(data));
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}
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}).then(xhrParseJsonResponse);
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}
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return {
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NetworkError, UnexpectedMimeError, InvalidJsonError,
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NetworkError, NotOkError, UnexpectedMimeError, InvalidJsonError,
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getJson, postJson
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};
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