Add usimp.js

www/res/js/locutus.js

@@ -9,7 +9,7 @@ function createWelcomeWindow() {
 
     win.innerHTML = `
         <h1>Welcome to Locutus!</h1>
-        <a href="#/login">Login</a>`;
+        <a href="#/login" class="button">Login</a>`;
 
     while (windows.lastChild) windows.removeChild(windows.lastChild);
     windows.appendChild(win);
@@ -22,11 +22,22 @@ function createLoginWindow() {
     win.innerHTML = `
         <h1>Login to USIMP Account</h1>
         <form>
-            <input name="account" placeholder="Account name" type="text"/>
-            <input name="domain" placeholder="Domain" type="text"/>
-            <input name="password" placeholder="Password" type="password"/>
+            <input name="account" placeholder="Account name" type="text" required/>
+            <input name="domain" placeholder="Domain" type="text" pattern="([a-zA-Z0-9_-]+\\.)+[a-zA-Z]{2,}" required/>
+            <input name="password" placeholder="Password" type="password" required/>
+            <button type="submit">Login</button>
         </form>`;
 
+    win.getElementsByTagName('form')[0].addEventListener("submit", function (evt) {
+        evt.preventDefault();
+        let form = evt.target;
+        usimp.lookup(form.domain.value)
+            .then(res => res.json()
+                .then(data => console.log(data))
+                .catch(reason => console.error(reason)))
+            .catch(reason => console.error(reason));
+    });
+
     while (windows.lastChild) windows.removeChild(windows.lastChild);
     windows.appendChild(win);
 }
@@ -53,7 +64,7 @@ function handleUrl(url) {
     handleHash(new URL(url).hash);
 }
 
-window.addEventListener("load", function () {
+window.addEventListener("DOMContentLoaded", function () {
     main = document.getElementsByTagName("main")[0];
     windows = document.getElementById("windows");
 

www/res/js/usimp.js

@@ -0,0 +1,9 @@
+"use strict";
+
+let usimp = {};
+
+usimp.lookup = function (domain_name) {
+    return fetch(`https://${domain_name}/.well-known/usimp.json`, {
+        redirect: "manual",
+    });
+}