Reaction UI

3 files changed, 119 insertions, 0 deletions

diff --git a/haunt/jakob/builder/blog.scm b/haunt/jakob/builder/blog.scm
index de1c788..3285a51 100644
--- a/haunt/jakob/builder/blog.scm
+++ b/haunt/jakob/builder/blog.scm
@@ -89,6 +89,7 @@
        (input (@ (name "source") (type "url")))
        (input (@ (value "Send Webmention") (type "submit"))))
       ,(script "section-folds.js")
+      ,(script "comment-reaction.js")
       ;; ,(script "webmention.js")
       )))
 
diff --git a/haunt/static/css/style.css b/haunt/static/css/style.css
index b48108b..2672f7c 100644
--- a/haunt/static/css/style.css
+++ b/haunt/static/css/style.css
@@ -233,6 +233,21 @@ ul.webmention-container .comment .comment-source-identifier {
     max-width: 16px;
 }
 
+/* Widget for comment reactions. */
+
+.emoji-picker {
+    width: 16em;
+    height: 2.75em;
+    border: solid 1px;
+    overflow: scroll;
+}
+
+.emoji-picker > span {
+    margin: 2px;
+    font-size: 2em;
+}
+
+
 /* Webmention form. */
 
 #webmention-form form {
diff --git a/haunt/static/js/comment-reaction.js b/haunt/static/js/comment-reaction.js
new file mode 100644
index 0000000..530abf0
--- /dev/null
+++ b/haunt/static/js/comment-reaction.js
@@ -0,0 +1,103 @@
+/*
+ * comment-reaction.js -- Glue for Nolan Lawson's JavaScript emoji picker
+ * Copyright © 2023 Jakob L. Kreuze <zerodaysfordays@sdf.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+function encodeAsFormData(obj) {
+  // Turn the data object into an array of URL-encoded key/value pairs.
+  let urlEncodedDataPairs = [];
+  for (let key in obj) {
+    urlEncodedDataPairs.push(encodeURIComponent(key) + '=' + encodeURIComponent(obj[key]));
+  }
+  return urlEncodedDataPairs.join('&');
+}
+
+function postReaction(reaction) {
+  let xhr = new XMLHttpRequest();
+  xhr.open('POST', "/api/comment/react", true);
+
+  // Endpoint expects HTML form data.
+  xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
+
+  xhr.onload = function(data) {
+    if (xhr.status != 200) {
+      alert("Failed to react.");
+    } else {
+    }
+  }
+  xhr.onerror = function(error) {
+    throw new Error(`Request failed: ${error}`);
+  }
+
+  xhr.send(encodeAsFormData(reaction));
+}
+
+
+// Simple Emoji picker widget.
+function selectorWidget() {
+  function emojiButton(codepoint) {
+    let span = document.createElement("span");
+    span.innerHTML = String.fromCodePoint(codepoint);
+    return span;
+  }
+
+  let selector = document.createElement("div");
+  selector.setAttribute("class", "emoji-picker");
+
+  for (let i = 0x1F600; i < 0x1F64F; i++) {
+    selector.appendElement(emojiButton(i));
+  }
+  return selector;
+}
+
+// Add a "react" button to every local comment.
+window.addEventListener("load", () => {
+  // First pass to add a separator for the buttons.
+  let replyButtons = document.querySelectorAll(".comment-reply-button");
+  for (let button of replyButtons) {
+    let parent = button.parentNode;
+    parent.innerHTML += " - ";
+
+  }
+
+  // Second pass to add the actual "react" button.
+  replyButtons = document.querySelectorAll(".comment-reply-button");
+  for (let button of replyButtons) {
+    let reactButton = document.createElement("a");
+    reactButton.setAttribute("class", "comment-react-button");
+    reactButton.setAttribute("href", "#");
+    reactButton.setAttribute("data-react-to-id", button.getAttribute("data-reply-to-id"));
+    reactButton.innerHTML = "react";
+    button.parentNode.appendChild(reactButton);
+
+    reactButton.addEventListener('click', (e) => {
+      let emojiPicker = selectorWidget();
+      button.parentNode.parentNode.insertBefore(emojiPicker, button.parentNode);
+      for (let button of emojiPicker.children) {
+        button.addEventListener('click', (e) => {
+          postReaction({
+            "id": reactButton.getAttribute("data-react-to-id"),
+            "reaction": button.innerHTML
+          });
+          emojiPicker.remove();
+        });
+      }
+
+      e.preventDefault();
+    });
+  }
+});