Add emojiReact utils with tests

app/gabsocial/features/status/components/status_interaction_bar.js

@@ -1,16 +1,7 @@
 import React from 'react';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import emojify from 'gabsocial/features/emoji/emoji';
-
-// https://emojipedia.org/facebook/
-const ALLOWED_EMOJI = [
-  '👍',
-  '❤️',
-  '😂',
-  '😯',
-  '😢',
-  '😡',
-];
+import { reduceEmoji } from 'gabsocial/utils/emoji_reacts';
 
 export class StatusInteractionBar extends React.Component {
 
@@ -18,35 +9,15 @@ export class StatusInteractionBar extends React.Component {
     status: ImmutablePropTypes.map,
   }
 
-  sortEmoji = emojiReacts => (
-    emojiReacts // TODO: Sort by count
-  );
-
-  mergeEmoji = emojiReacts => (
-    emojiReacts // TODO: Merge similar emoji
-  );
-
-  filterEmoji = emojiReacts => (
-    emojiReacts.filter(emojiReact => (
-      ALLOWED_EMOJI.includes(emojiReact.get('name'))
-    )))
-
   render() {
     const { status } = this.props;
     const emojiReacts = status.getIn(['pleroma', 'emoji_reactions']);
-    const likeCount = status.get('favourites_count');
+    const favouritesCount = status.get('favourites_count');
 
     return (
-      <>
-        {likeCount > 0 && <span className='emoji-react'>
-          <span
-            className='emoji-react--emoji'
-            dangerouslySetInnerHTML={{ __html: emojify('👍') }}
-          />
-          <span className='emoji-react--count'>{likeCount}</span>
-        </span>}
-        {this.filterEmoji(emojiReacts).map(e => (
-          <span className='emoji-react'>
+      <div className='emoji-reacts'>
+        {reduceEmoji(emojiReacts, favouritesCount).map((e, i) => (
+          <span className='emoji-react' key={i}>
             <span
               className='emoji-react--emoji'
               dangerouslySetInnerHTML={{ __html: emojify(e.get('name')) }}
@@ -54,7 +25,7 @@ export class StatusInteractionBar extends React.Component {
             <span className='emoji-react--count'>{e.get('count')}</span>
           </span>
         ))}
-      </>
+      </div>
     );
   }
 

app/gabsocial/utils/__tests__/emoji_reacts-test.js

@@ -0,0 +1,110 @@
+import {
+  sortEmoji,
+  mergeEmojiFavourites,
+  filterEmoji,
+  reduceEmoji,
+} from '../emoji_reacts';
+import { fromJS } from 'immutable';
+
+describe('filterEmoji', () => {
+  describe('with a mix of allowed and disallowed emoji', () => {
+    const emojiReacts = fromJS([
+      { 'count': 1, 'me': true, 'name': '🌵' },
+      { 'count': 1, 'me': true, 'name': '😂' },
+      { 'count': 1, 'me': true, 'name': '👀' },
+      { 'count': 1, 'me': true, 'name': '🍩' },
+      { 'count': 1, 'me': true, 'name': '😡' },
+      { 'count': 1, 'me': true, 'name': '🔪' },
+      { 'count': 1, 'me': true, 'name': '😠' },
+    ]);
+    it('filters only allowed emoji', () => {
+      expect(filterEmoji(emojiReacts)).toEqual(fromJS([
+        { 'count': 1, 'me': true, 'name': '😂' },
+        { 'count': 1, 'me': true, 'name': '😡' },
+      ]));
+    });
+  });
+});
+
+describe('sortEmoji', () => {
+  describe('with an unsorted list of emoji', () => {
+    const emojiReacts = fromJS([
+      { 'count': 7,  'me': true, 'name': '😯' },
+      { 'count': 3,  'me': true, 'name': '😢' },
+      { 'count': 1,  'me': true, 'name': '😡' },
+      { 'count': 20, 'me': true, 'name': '👍' },
+      { 'count': 7,  'me': true, 'name': '😂' },
+      { 'count': 15, 'me': true, 'name': '❤️' },
+    ]);
+    it('sorts the emoji by count', () => {
+      expect(sortEmoji(emojiReacts)).toEqual(fromJS([
+        { 'count': 20, 'me': true, 'name': '👍' },
+        { 'count': 15, 'me': true, 'name': '❤️' },
+        { 'count': 7,  'me': true, 'name': '😯' },
+        { 'count': 7,  'me': true, 'name': '😂' },
+        { 'count': 3,  'me': true, 'name': '😢' },
+        { 'count': 1,  'me': true, 'name': '😡' },
+      ]));
+    });
+  });
+});
+
+describe('mergeEmojiFavourites', () => {
+  const favouritesCount = 12;
+
+  describe('with existing 👍 reacts', () => {
+    const emojiReacts = fromJS([
+      { 'count': 20, 'me': true, 'name': '👍' },
+      { 'count': 15, 'me': true, 'name': '❤️' },
+      { 'count': 7,  'me': true, 'name': '😯' },
+    ]);
+    it('combines 👍 reacts with favourites', () => {
+      expect(mergeEmojiFavourites(emojiReacts, favouritesCount)).toEqual(fromJS([
+        { 'count': 32, 'me': true, 'name': '👍' },
+        { 'count': 15, 'me': true, 'name': '❤️' },
+        { 'count': 7,  'me': true, 'name': '😯' },
+      ]));
+    });
+  });
+
+  describe('without existing 👍 reacts', () => {
+    const emojiReacts = fromJS([
+      { 'count': 15, 'me': true, 'name': '❤️' },
+      { 'count': 7,  'me': true, 'name': '😯' },
+    ]);
+    it('adds 👍 reacts to the map equaling favourite count', () => {
+      expect(mergeEmojiFavourites(emojiReacts, favouritesCount)).toEqual(fromJS([
+        { 'count': 15, 'me': true,  'name': '❤️' },
+        { 'count': 7,  'me': true,  'name': '😯' },
+        { 'count': 12, 'me': false, 'name': '👍' },
+      ]));
+    });
+  });
+});
+
+describe('reduceEmoji', () => {
+  describe('with a clusterfuck of emoji', () => {
+    const emojiReacts = fromJS([
+      { 'count': 1,  'me': false, 'name': '😡' },
+      { 'count': 1,  'me': true,  'name': '🔪' },
+      { 'count': 7,  'me': true,  'name': '😯' },
+      { 'count': 3,  'me': false, 'name': '😢' },
+      { 'count': 1,  'me': true,  'name': '🌵' },
+      { 'count': 20, 'me': true,  'name': '👍' },
+      { 'count': 7,  'me': false, 'name': '😂' },
+      { 'count': 15, 'me': true,  'name': '❤️' },
+      { 'count': 1,  'me': false, 'name': '👀' },
+      { 'count': 1,  'me': false, 'name': '🍩' },
+    ]);
+    it('sorts, filters, and combines emoji and favourites', () => {
+      expect(reduceEmoji(emojiReacts, 7)).toEqual(fromJS([
+        { 'count': 27, 'me': true,  'name': '👍' },
+        { 'count': 15, 'me': true,  'name': '❤️' },
+        { 'count': 7,  'me': true,  'name': '😯' },
+        { 'count': 7,  'me': false, 'name': '😂' },
+        { 'count': 3,  'me': false, 'name': '😢' },
+        { 'count': 1,  'me': false, 'name': '😡' },
+      ]));
+    });
+  });
+});

app/gabsocial/utils/emoji_reacts.js

@@ -0,0 +1,40 @@
+import { Map as ImmutableMap } from 'immutable';
+
+// https://emojipedia.org/facebook/
+export const ALLOWED_EMOJI = [
+  '👍',
+  '❤️',
+  '😂',
+  '😯',
+  '😢',
+  '😡',
+];
+
+export const sortEmoji = emojiReacts => (
+  emojiReacts.sortBy(emojiReact => -emojiReact.get('count'))
+);
+
+export const mergeEmoji = emojiReacts => (
+  emojiReacts // TODO: Merge similar emoji
+);
+
+export const mergeEmojiFavourites = (emojiReacts, favouritesCount) => {
+  const likeIndex = emojiReacts.findIndex(emojiReact =>
+    emojiReact.get('name') === '👍');
+  if (likeIndex > -1) {
+    const likeCount = emojiReacts.getIn([likeIndex, 'count']);
+    return emojiReacts.setIn([likeIndex, 'count'], likeCount + favouritesCount);
+  } else {
+    return emojiReacts.push(ImmutableMap({ count: favouritesCount, me: false, name: '👍' }));
+  }
+};
+
+export const filterEmoji = emojiReacts => (
+  emojiReacts.filter(emojiReact => (
+    ALLOWED_EMOJI.includes(emojiReact.get('name'))
+  )));
+
+export const reduceEmoji = (emojiReacts, favouritesCount) => (
+  sortEmoji(filterEmoji(mergeEmoji(mergeEmojiFavourites(
+    emojiReacts, favouritesCount
+  )))));