1 files changed, 99 insertions, 0 deletions
diff --git a/app/assets/javascripts/emoji/index.js b/app/assets/javascripts/emoji/index.js
new file mode 100644
index 00000000000..cac35d6eed5
--- /dev/null
+++ b/app/assets/javascripts/emoji/index.js
@@ -0,0 +1,99 @@
+import emojiMap from 'emojis/digests.json';
+import emojiAliases from 'emojis/aliases.json';
+
+export const validEmojiNames = [...Object.keys(emojiMap), ...Object.keys(emojiAliases)];
+
+export function normalizeEmojiName(name) {
+  return Object.prototype.hasOwnProperty.call(emojiAliases, name) ? emojiAliases[name] : name;
+}
+
+export function isEmojiNameValid(name) {
+  return validEmojiNames.indexOf(name) >= 0;
+}
+
+export function filterEmojiNames(filter) {
+  const match = filter.toLowerCase();
+  return validEmojiNames.filter(name => name.indexOf(match) >= 0);
+}
+
+export function filterEmojiNamesByAlias(filter) {
+  return _.uniq(filterEmojiNames(filter).map(name => normalizeEmojiName(name)));
+}
+
+let emojiCategoryMap;
+export function getEmojiCategoryMap() {
+  if (!emojiCategoryMap) {
+    emojiCategoryMap = {
+      activity: [],
+      people: [],
+      nature: [],
+      food: [],
+      travel: [],
+      objects: [],
+      symbols: [],
+      flags: [],
+    };
+    Object.keys(emojiMap).forEach((name) => {
+      const emoji = emojiMap[name];
+      if (emojiCategoryMap[emoji.category]) {
+        emojiCategoryMap[emoji.category].push(name);
+      }
+    });
+  }
+  return emojiCategoryMap;
+}
+
+export function getEmojiInfo(query) {
+  let name = normalizeEmojiName(query);
+  let emojiInfo = emojiMap[name];
+
+  // Fallback to question mark for unknown emojis
+  if (!emojiInfo) {
+    name = 'grey_question';
+    emojiInfo = emojiMap[name];
+  }
+
+  return { ...emojiInfo, name };
+}
+
+export function emojiFallbackImageSrc(inputName) {
+  const { name, digest } = getEmojiInfo(inputName);
+  return `${gon.asset_host || ''}${gon.relative_url_root || ''}/assets/emoji/${name}-${digest}.png`;
+}
+
+export function emojiImageTag(name, src) {
+  return `<img class="emoji" title=":${name}:" alt=":${name}:" src="${src}" width="20" height="20" align="absmiddle" />`;
+}
+
+export function glEmojiTag(inputName, options) {
+  const opts = { sprite: false, forceFallback: false, ...options };
+  const { name, ...emojiInfo } = getEmojiInfo(inputName);
+
+  const fallbackImageSrc = emojiFallbackImageSrc(name);
+  const fallbackSpriteClass = `emoji-${name}`;
+
+  const classList = [];
+  if (opts.forceFallback && opts.sprite) {
+    classList.push('emoji-icon');
+    classList.push(fallbackSpriteClass);
+  }
+  const classAttribute = classList.length > 0 ? `class="${classList.join(' ')}"` : '';
+  const fallbackSpriteAttribute = opts.sprite ? `data-fallback-sprite-class="${fallbackSpriteClass}"` : '';
+  let contents = emojiInfo.moji;
+  if (opts.forceFallback && !opts.sprite) {
+    contents = emojiImageTag(name, fallbackImageSrc);
+  }
+
+  return `
+    <gl-emoji
+      ${classAttribute}
+      data-name="${name}"
+      data-fallback-src="${fallbackImageSrc}"
+      ${fallbackSpriteAttribute}
+      data-unicode-version="${emojiInfo.unicodeVersion}"
+      title="${emojiInfo.description}"
+    >
+      ${contents}
+    </gl-emoji>
+  `;
+}