Merge branch 'feature/comment-reactions'

commit 626e7b65e9a7c00ed68c78400e03e27cbd4c77c0
Author: Jakob L. Kreuze <zerodaysfordays@sdf.org>
Date:   Tue Mar 14 18:05:47 2023 -0400

    Indicator when reaction attempt succeeded

commit e446f67898a05091b2f05df9ed81ca73764f6069
Author: Jakob L. Kreuze <zerodaysfordays@sdf.org>
Date:   Tue Mar 14 18:05:16 2023 -0400

    Bug fixes

commit ab6edd57158574df80fe33138e99a317c64a0861
Author: Jakob L. Kreuze <zerodaysfordays@sdf.org>
Date:   Sun Mar 12 08:43:03 2023 -0400

    Better error reporting for reactions

commit 9d0638a78333ca35aa1bd12c5c6ced8bd2d7687d
Author: Jakob L. Kreuze <zerodaysfordays@sdf.org>
Date:   Sun Mar 12 08:38:49 2023 -0400

    Update comment and weblabels

commit 4a8378715c2e4e559731b319cac920c00cb32116
Author: Jakob L. Kreuze <zerodaysfordays@sdf.org>
Date:   Sun Mar 12 08:37:40 2023 -0400

    Allow for more emojis

commit 655f40bb267cc6df82356a0422146e555b94cf99
Author: Jakob L. Kreuze <zerodaysfordays@sdf.org>
Date:   Sat Mar 11 19:35:05 2023 -0500

    Rate limit `put-reaction'

commit 6463a9f09032f22c8e39ccea757b8a7054f199ba
Author: Jakob L. Kreuze <zerodaysfordays@sdf.org>
Date:   Sat Mar 11 19:33:53 2023 -0500

    Guard against non-emoji reactions

commit 32e642f3789d163fae18824ec04e7e833713b26c
Author: Jakob L. Kreuze <zerodaysfordays@sdf.org>
Date:   Sat Mar 11 19:32:05 2023 -0500

    Reaction UI

commit 4d07077daedc30271be69c86c855795affdea860
Author: Jakob L. Kreuze <zerodaysfordays@sdf.org>
Date:   Sat Mar 11 16:51:46 2023 -0500

    Address parsing issues in `put-reaction' endpoint

1 files changed, 129 insertions, 0 deletions

diff --git a/haunt/static/js/comment-reaction.js b/haunt/static/js/comment-reaction.js
new file mode 100644
index 0000000..db980b3
--- /dev/null
+++ b/haunt/static/js/comment-reaction.js
@@ -0,0 +1,129 @@
+/*
+ * comment-reaction.js -- Simple emoji picker and glue for reaction endpoint
+ * 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, callback) {
+  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) {
+    switch (xhr.status) {
+    case 200:
+      callback();
+      break;
+    case 429:
+      alert("Failed -- you can react at most once an hour.");
+      break;
+    default:
+      let resp = JSON.parse(xhr.response);
+      alert("Failed -- " + resp.error);
+      break;
+    }
+  }
+  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.appendChild(emojiButton(i));
+  }
+  selector.appendChild(emojiButton(0x1F37B));
+  selector.appendChild(emojiButton(0x1F440));
+  selector.appendChild(emojiButton(0x1F446));
+  selector.appendChild(emojiButton(0x1F447));
+  selector.appendChild(emojiButton(0x1F448));
+  selector.appendChild(emojiButton(0x1F449));
+  selector.appendChild(emojiButton(0x1F450));
+  selector.appendChild(emojiButton(0x270A));
+  selector.appendChild(emojiButton(0x270B));
+  selector.appendChild(emojiButton(0x270C));
+  selector.appendChild(emojiButton(0x270D));
+  for (let i = 0x1F90C; i < 0x1F9FF; i++) {
+    selector.appendChild(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
+          }, () => {
+            let reactAcknowledgement = document.createElement("span");
+            reactAcknowledgement.innerHTML = "successfully reacted!"
+            reactButton.replaceWith(reactAcknowledgement);
+          });
+          emojiPicker.remove();
+        });
+      }
+
+      e.preventDefault();
+    });
+  }
+});