Add sharing functionality

src/script/index.js

@@ -0,0 +1,39 @@
+var remembered = window.localStorage.getItem('mastodon_instance');
+if (remembered != null) {
+    document.getElementById('instance').value = remembered;
+}
+
+var parsedQuery = {};
+
+var paramPairs = window.location.search.substr(1).split('&');
+var paramPairsLength = paramPairs.length;
+
+for (var i = 0; i < paramPairsLength; i++) {
+    var paramPair = paramPairs[i].split('=');
+    parsedQuery[paramPair[0]] = paramPair[1];
+}
+delete i
+delete paramPair
+
+document
+  .getElementById('form')
+  .addEventListener('submit', function (e) {
+    e.preventDefault();
+    var instance = e.target.elements['instance'].value;
+    var remember = e.target.elements['remember'].checked;
+
+
+    if (!(instance.startsWith("https://") || instance.startsWith("http://"))) {
+        instance = "https://" + instance;
+    }
+    if (!instance.endsWith("/")){
+        instance = instance + "/";
+    }
+
+    if (remember) {
+        window.localStorage.setItem('mastodon_instance', instance);
+    }
+
+    var shareUrl = instance + "share?text=" + parsedQuery.text;
+    window.open(shareUrl, '_blank', 'noopener,noreferrer')
+})