Compress and combine emoji data (#5229)

19 files changed, 224 insertions, 90 deletions

diff --git a/app/javascript/mastodon/actions/compose.js b/app/javascript/mastodon/actions/compose.js
index ed4837ebd..560c00720 100644
--- a/app/javascript/mastodon/actions/compose.js
+++ b/app/javascript/mastodon/actions/compose.js
@@ -1,6 +1,6 @@
 import api from '../api';
 import { throttle } from 'lodash';
-import { search as emojiSearch } from '../emoji_index_light';
+import { search as emojiSearch } from '../features/emoji/emoji_mart_search_light';
 
 import {
   updateTimeline,
diff --git a/app/javascript/mastodon/components/autosuggest_emoji.js b/app/javascript/mastodon/components/autosuggest_emoji.js
index 31dc1dbb1..ce4383a60 100644
--- a/app/javascript/mastodon/components/autosuggest_emoji.js
+++ b/app/javascript/mastodon/components/autosuggest_emoji.js
@@ -1,6 +1,6 @@
 import React from 'react';
 import PropTypes from 'prop-types';
-import { unicodeMapping } from '../emojione_light';
+import unicodeMapping from '../features/emoji/emoji_unicode_mapping_light';
 
 const assetHost = process.env.CDN_HOST || '';
 
@@ -23,7 +23,7 @@ export default class AutosuggestEmoji extends React.PureComponent {
         return null;
       }
 
-      url = `${assetHost}/emoji/${mapping[0]}.svg`;
+      url = `${assetHost}/emoji/${mapping.filename}.svg`;
     }
 
     return (
diff --git a/app/javascript/mastodon/emoji_data_compressed.js b/app/javascript/mastodon/emoji_data_compressed.js
deleted file mode 100644
index f69a3e46a..000000000
--- a/app/javascript/mastodon/emoji_data_compressed.js
+++ /dev/null
@@ -1,22 +0,0 @@
-// @preval
-const data = require('emoji-mart/dist/data').default;
-const pick = require('lodash/pick');
-const values = require('lodash/values');
-
-const condensedEmojis = Object.keys(data.emojis).map(key => {
-  if (!data.emojis[key].short_names[0] === key) {
-    throw new Error('The condenser expects the first short_code to be the ' +
-      'key. It may need to be rewritten if the emoji change such that this ' +
-      'is no longer the case.');
-  }
-  return values(pick(data.emojis[key], ['short_names', 'unified', 'search']));
-});
-
-// JSON.parse/stringify is to emulate what @preval is doing and avoid any
-// inconsistent behavior in dev mode
-module.exports = JSON.parse(JSON.stringify({
-  emojis: condensedEmojis,
-  skins: data.skins,
-  categories: data.categories,
-  short_names: data.short_names,
-}));
diff --git a/app/javascript/mastodon/emoji_data_light.js b/app/javascript/mastodon/emoji_data_light.js
deleted file mode 100644
index f91ee592e..000000000
--- a/app/javascript/mastodon/emoji_data_light.js
+++ /dev/null
@@ -1,16 +0,0 @@
-const data = require('./emoji_data_compressed');
-
-// decompress
-const emojis = {};
-data.emojis.forEach(compressedEmoji => {
-  const [ short_names, unified, search ] = compressedEmoji;
-  emojis[short_names[0]] = {
-    short_names,
-    unified,
-    search,
-  };
-});
-
-data.emojis = emojis;
-
-module.exports = data;
diff --git a/app/javascript/mastodon/emojione_light.js b/app/javascript/mastodon/emojione_light.js
deleted file mode 100644
index 2296497b0..000000000
--- a/app/javascript/mastodon/emojione_light.js
+++ /dev/null
@@ -1,38 +0,0 @@
-// @preval
-// http://www.unicode.org/Public/emoji/5.0/emoji-test.txt
-
-const emojis         = require('./emoji_map.json');
-const { emojiIndex } = require('emoji-mart');
-const excluded       = ['®', '©', '™'];
-const skins          = ['🏻', '🏼', '🏽', '🏾', '🏿'];
-const shortcodeMap   = {};
-
-Object.keys(emojiIndex.emojis).forEach(key => {
-  shortcodeMap[emojiIndex.emojis[key].native] = emojiIndex.emojis[key].id;
-});
-
-const stripModifiers = unicode => {
-  skins.forEach(tone => {
-    unicode = unicode.replace(tone, '');
-  });
-
-  return unicode;
-};
-
-Object.keys(emojis).forEach(key => {
-  if (excluded.includes(key)) {
-    delete emojis[key];
-    return;
-  }
-
-  const normalizedKey = stripModifiers(key);
-  let shortcode       = shortcodeMap[normalizedKey];
-
-  if (!shortcode) {
-    shortcode = shortcodeMap[normalizedKey + '\uFE0F'];
-  }
-
-  emojis[key] = [emojis[key], shortcode];
-});
-
-module.exports.unicodeMapping = emojis;
diff --git a/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.js b/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.js
index bbc6b7a16..2bea5e2b1 100644
--- a/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.js
+++ b/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.js
@@ -6,7 +6,7 @@ import Overlay from 'react-overlays/lib/Overlay';
 import classNames from 'classnames';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import detectPassiveEvents from 'detect-passive-events';
-import { buildCustomEmojis } from '../../../emoji';
+import { buildCustomEmojis } from '../../emoji/emoji';
 
 const messages = defineMessages({
   emoji: { id: 'emoji_button.label', defaultMessage: 'Insert emoji' },
diff --git a/app/javascript/mastodon/emoji.js b/app/javascript/mastodon/features/emoji/emoji.js
index cf0077958..998cb0a06 100644
--- a/app/javascript/mastodon/emoji.js
+++ b/app/javascript/mastodon/features/emoji/emoji.js
@@ -1,4 +1,4 @@
-import { unicodeMapping } from './emojione_light';
+import unicodeMapping from './emoji_unicode_mapping_light';
 import Trie from 'substring-trie';
 
 const trie = new Trie(Object.keys(unicodeMapping));
@@ -35,8 +35,9 @@ const emojify = (str, customEmojis = {}) => {
       if (!rend) break;
       i = rend;
     } else { // matched to unicode emoji
-      const [filename, shortCode] = unicodeMapping[match];
-      replacement = `<img draggable="false" class="emojione" alt="${match}" title=":${shortCode}:" src="${assetHost}/emoji/${filename}.svg" />`;
+      const { filename, shortCode } = unicodeMapping[match];
+      const title = shortCode ? `:${shortCode}:` : '';
+      replacement = `<img draggable="false" class="emojione" alt="${match}" title="${title}" src="${assetHost}/emoji/${filename}.svg" />`;
       rend = i + match.length;
     }
     rtn += str.slice(0, i) + replacement;
diff --git a/app/javascript/mastodon/features/emoji/emoji_compressed.js b/app/javascript/mastodon/features/emoji/emoji_compressed.js
new file mode 100644
index 000000000..3ed4dc82b
--- /dev/null
+++ b/app/javascript/mastodon/features/emoji/emoji_compressed.js
@@ -0,0 +1,90 @@
+// @preval
+// http://www.unicode.org/Public/emoji/5.0/emoji-test.txt
+// This file contains the compressed version of the emoji data from
+// both emoji_map.json and from emoji-mart's emojiIndex and data objects.
+// It's designed to be emitted in an array format to take up less space
+// over the wire.
+
+const { unicodeToFilename } = require('./unicode_to_filename');
+const { unicodeToUnifiedName } = require('./unicode_to_unified_name');
+const emojiMap         = require('./emoji_map.json');
+const { emojiIndex } = require('emoji-mart');
+const emojiMartData = require('emoji-mart/dist/data').default;
+const excluded       = ['®', '©', '™'];
+const skins          = ['🏻', '🏼', '🏽', '🏾', '🏿'];
+const shortcodeMap   = {};
+
+const shortCodesToEmojiData = {};
+const emojisWithoutShortCodes = [];
+
+Object.keys(emojiIndex.emojis).forEach(key => {
+  shortcodeMap[emojiIndex.emojis[key].native] = emojiIndex.emojis[key].id;
+});
+
+const stripModifiers = unicode => {
+  skins.forEach(tone => {
+    unicode = unicode.replace(tone, '');
+  });
+
+  return unicode;
+};
+
+Object.keys(emojiMap).forEach(key => {
+  if (excluded.includes(key)) {
+    delete emojiMap[key];
+    return;
+  }
+
+  const normalizedKey = stripModifiers(key);
+  let shortcode       = shortcodeMap[normalizedKey];
+
+  if (!shortcode) {
+    shortcode = shortcodeMap[normalizedKey + '\uFE0F'];
+  }
+
+  const filename = emojiMap[key];
+
+  const filenameData = [key];
+
+  if (unicodeToFilename(key) !== filename) {
+    // filename can't be derived using unicodeToFilename
+    filenameData.push(filename);
+  }
+
+  if (typeof shortcode === 'undefined') {
+    emojisWithoutShortCodes.push(filenameData);
+  } else {
+    shortCodesToEmojiData[shortcode] = shortCodesToEmojiData[shortcode] || [[]];
+    shortCodesToEmojiData[shortcode][0].push(filenameData);
+  }
+});
+
+Object.keys(emojiIndex.emojis).forEach(key => {
+  const { native } = emojiIndex.emojis[key];
+  const { short_names, search, unified } = emojiMartData.emojis[key];
+  if (short_names[0] !== key) {
+    throw new Error('The compresser expects the first short_code to be the ' +
+      'key. It may need to be rewritten if the emoji change such that this ' +
+      'is no longer the case.');
+  }
+
+  short_names.splice(0, 1); // first short name can be inferred from the key
+
+  const searchData = [native, short_names, search];
+  if (unicodeToUnifiedName(native) !== unified) {
+    // unified name can't be derived from unicodeToUnifiedName
+    searchData.push(unified);
+  }
+
+  shortCodesToEmojiData[key].push(searchData);
+});
+
+// JSON.parse/stringify is to emulate what @preval is doing and avoid any
+// inconsistent behavior in dev mode
+module.exports = JSON.parse(JSON.stringify([
+  shortCodesToEmojiData,
+  emojiMartData.skins,
+  emojiMartData.categories,
+  emojiMartData.short_names,
+  emojisWithoutShortCodes,
+]));
diff --git a/app/javascript/mastodon/emoji_map.json b/app/javascript/mastodon/features/emoji/emoji_map.json
index 13753ba84..13753ba84 100644
--- a/app/javascript/mastodon/emoji_map.json
+++ b/app/javascript/mastodon/features/emoji/emoji_map.json
diff --git a/app/javascript/mastodon/features/emoji/emoji_mart_data_light.js b/app/javascript/mastodon/features/emoji/emoji_mart_data_light.js
new file mode 100644
index 000000000..45086fc4c
--- /dev/null
+++ b/app/javascript/mastodon/features/emoji/emoji_mart_data_light.js
@@ -0,0 +1,41 @@
+// The output of this module is designed to mimic emoji-mart's
+// "data" object, such that we can use it for a light version of emoji-mart's
+// emojiIndex.search functionality.
+const { unicodeToUnifiedName } = require('./unicode_to_unified_name');
+const [ shortCodesToEmojiData, skins, categories, short_names ] = require('./emoji_compressed');
+
+const emojis = {};
+
+// decompress
+Object.keys(shortCodesToEmojiData).forEach((shortCode) => {
+  let [
+    filenameData, // eslint-disable-line no-unused-vars
+    searchData,
+  ] = shortCodesToEmojiData[shortCode];
+  let [
+    native,
+    short_names,
+    search,
+    unified,
+  ] = searchData;
+
+  if (!unified) {
+    // unified name can be derived from unicodeToUnifiedName
+    unified = unicodeToUnifiedName(native);
+  }
+
+  short_names = [shortCode].concat(short_names);
+  emojis[shortCode] = {
+    native,
+    search,
+    short_names,
+    unified,
+  };
+});
+
+module.exports = {
+  emojis,
+  skins,
+  categories,
+  short_names,
+};
diff --git a/app/javascript/mastodon/emoji_index_light.js b/app/javascript/mastodon/features/emoji/emoji_mart_search_light.js
index 0719eda5e..5da8de1cf 100644
--- a/app/javascript/mastodon/emoji_index_light.js
+++ b/app/javascript/mastodon/features/emoji/emoji_mart_search_light.js
@@ -1,7 +1,7 @@
 // This code is largely borrowed from:
 // https://github.com/missive/emoji-mart/blob/bbd4fbe/src/utils/emoji-index.js
 
-import data from './emoji_data_light';
+import data from './emoji_mart_data_light';
 import { getData, getSanitizedData, intersect } from './emoji_utils';
 
 let index = {};
diff --git a/app/javascript/mastodon/features/emoji/emoji_unicode_mapping_light.js b/app/javascript/mastodon/features/emoji/emoji_unicode_mapping_light.js
new file mode 100644
index 000000000..918684c31
--- /dev/null
+++ b/app/javascript/mastodon/features/emoji/emoji_unicode_mapping_light.js
@@ -0,0 +1,35 @@
+// A mapping of unicode strings to an object containing the filename
+// (i.e. the svg filename) and a shortCode intended to be shown
+// as a "title" attribute in an HTML element (aka tooltip).
+
+const [
+  shortCodesToEmojiData,
+  skins, // eslint-disable-line no-unused-vars
+  categories, // eslint-disable-line no-unused-vars
+  short_names, // eslint-disable-line no-unused-vars
+  emojisWithoutShortCodes,
+] = require('./emoji_compressed');
+const { unicodeToFilename } = require('./unicode_to_filename');
+
+// decompress
+const unicodeMapping = {};
+
+function processEmojiMapData(emojiMapData, shortCode) {
+  let [ native, filename ] = emojiMapData;
+  if (!filename) {
+    // filename name can be derived from unicodeToFilename
+    filename = unicodeToFilename(native);
+  }
+  unicodeMapping[native] = {
+    shortCode: shortCode,
+    filename: filename,
+  };
+}
+
+Object.keys(shortCodesToEmojiData).forEach((shortCode) => {
+  let [ filenameData ] = shortCodesToEmojiData[shortCode];
+  filenameData.forEach(emojiMapData => processEmojiMapData(emojiMapData, shortCode));
+});
+emojisWithoutShortCodes.forEach(emojiMapData => processEmojiMapData(emojiMapData));
+
+module.exports = unicodeMapping;
diff --git a/app/javascript/mastodon/emoji_utils.js b/app/javascript/mastodon/features/emoji/emoji_utils.js
index 6475df571..6ef2785d9 100644
--- a/app/javascript/mastodon/emoji_utils.js
+++ b/app/javascript/mastodon/features/emoji/emoji_utils.js
@@ -1,7 +1,7 @@
 // This code is largely borrowed from:
 // https://github.com/missive/emoji-mart/blob/bbd4fbe/src/utils/index.js
 
-import data from './emoji_data_light';
+import data from './emoji_mart_data_light';
 
 const COLONS_REGEX = /^(?:\:([^\:]+)\:)(?:\:skin-tone-(\d)\:)?$/;
 
diff --git a/app/javascript/mastodon/features/emoji/unicode_to_filename.js b/app/javascript/mastodon/features/emoji/unicode_to_filename.js
new file mode 100644
index 000000000..c75c4cd7d
--- /dev/null
+++ b/app/javascript/mastodon/features/emoji/unicode_to_filename.js
@@ -0,0 +1,26 @@
+// taken from:
+// https://github.com/twitter/twemoji/blob/47732c7/twemoji-generator.js#L848-L866
+exports.unicodeToFilename = (str) => {
+  let result = '';
+  let charCode = 0;
+  let p = 0;
+  let i = 0;
+  while (i < str.length) {
+    charCode = str.charCodeAt(i++);
+    if (p) {
+      if (result.length > 0) {
+        result += '-';
+      }
+      result += (0x10000 + ((p - 0xD800) << 10) + (charCode - 0xDC00)).toString(16);
+      p = 0;
+    } else if (0xD800 <= charCode && charCode <= 0xDBFF) {
+      p = charCode;
+    } else {
+      if (result.length > 0) {
+        result += '-';
+      }
+      result += charCode.toString(16);
+    }
+  }
+  return result;
+};
diff --git a/app/javascript/mastodon/features/emoji/unicode_to_unified_name.js b/app/javascript/mastodon/features/emoji/unicode_to_unified_name.js
new file mode 100644
index 000000000..808ac197e
--- /dev/null
+++ b/app/javascript/mastodon/features/emoji/unicode_to_unified_name.js
@@ -0,0 +1,17 @@
+function padLeft(str, num) {
+  while (str.length < num) {
+    str = '0' + str;
+  }
+  return str;
+}
+
+exports.unicodeToUnifiedName = (str) => {
+  let output = '';
+  for (let i = 0; i < str.length; i += 2) {
+    if (i > 0) {
+      output += '-';
+    }
+    output += padLeft(str.codePointAt(i).toString(16).toUpperCase(), 4);
+  }
+  return output;
+};
diff --git a/app/javascript/mastodon/reducers/accounts.js b/app/javascript/mastodon/reducers/accounts.js
index 5391a93ae..8a4d69f26 100644
--- a/app/javascript/mastodon/reducers/accounts.js
+++ b/app/javascript/mastodon/reducers/accounts.js
@@ -44,7 +44,7 @@ import {
   FAVOURITED_STATUSES_EXPAND_SUCCESS,
 } from '../actions/favourites';
 import { STORE_HYDRATE } from '../actions/store';
-import emojify from '../emoji';
+import emojify from '../features/emoji/emoji';
 import { Map as ImmutableMap, fromJS } from 'immutable';
 import escapeTextContentForBrowser from 'escape-html';
 
diff --git a/app/javascript/mastodon/reducers/custom_emojis.js b/app/javascript/mastodon/reducers/custom_emojis.js
index b7c9b1d7c..307bcc7dc 100644
--- a/app/javascript/mastodon/reducers/custom_emojis.js
+++ b/app/javascript/mastodon/reducers/custom_emojis.js
@@ -1,7 +1,7 @@
 import { List as ImmutableList } from 'immutable';
 import { STORE_HYDRATE } from '../actions/store';
-import { search as emojiSearch } from '../emoji_index_light';
-import { buildCustomEmojis } from '../emoji';
+import { search as emojiSearch } from '../features/emoji/emoji_mart_search_light';
+import { buildCustomEmojis } from '../features/emoji/emoji';
 
 const initialState = ImmutableList();
 
diff --git a/app/javascript/mastodon/reducers/statuses.js b/app/javascript/mastodon/reducers/statuses.js
index ed16e016f..32772fff7 100644
--- a/app/javascript/mastodon/reducers/statuses.js
+++ b/app/javascript/mastodon/reducers/statuses.js
@@ -39,7 +39,7 @@ import {
   PINNED_STATUSES_FETCH_SUCCESS,
 } from '../actions/pin_statuses';
 import { SEARCH_FETCH_SUCCESS } from '../actions/search';
-import emojify from '../emoji';
+import emojify from '../features/emoji/emoji';
 import { Map as ImmutableMap, fromJS } from 'immutable';
 import escapeTextContentForBrowser from 'escape-html';
 
diff --git a/app/javascript/packs/public.js b/app/javascript/packs/public.js
index 6f72a8050..a47fc2830 100644
--- a/app/javascript/packs/public.js
+++ b/app/javascript/packs/public.js
@@ -21,7 +21,7 @@ function main() {
   const { length } = require('stringz');
   const IntlRelativeFormat = require('intl-relativeformat').default;
   const { delegate } = require('rails-ujs');
-  const emojify = require('../mastodon/emoji').default;
+  const emojify = require('../mastodon/features/emoji/emoji').default;
   const { getLocale } = require('../mastodon/locales');
   const { localeData } = getLocale();
   const VideoContainer = require('../mastodon/containers/video_container').default;