Emoji and Hashtag autocomplete

app/javascript/mastodon/actions/compose.js

@@ -1,4 +1,5 @@
 import api from '../api';
+import emojione from 'emojione';
 
 import {
   updateTimeline,
@@ -22,6 +23,7 @@ export const COMPOSE_UPLOAD_UNDO     = 'COMPOSE_UPLOAD_UNDO';
 
 export const COMPOSE_SUGGESTIONS_CLEAR = 'COMPOSE_SUGGESTIONS_CLEAR';
 export const COMPOSE_SUGGESTIONS_READY = 'COMPOSE_SUGGESTIONS_READY';
+export const COMPOSE_SUGGESTIONS_READY_TXT = 'COMPOSE_SUGGESTIONS_READY_TXT';
 export const COMPOSE_SUGGESTION_SELECT = 'COMPOSE_SUGGESTION_SELECT';
 
 export const COMPOSE_MOUNT   = 'COMPOSE_MOUNT';
@@ -212,17 +214,43 @@ export function clearComposeSuggestions() {
 };
 
 export function fetchComposeSuggestions(token) {
-  return (dispatch, getState) => {
-    api(getState).get('/api/v1/accounts/search', {
-      params: {
-        q: token,
-        resolve: false,
-        limit: 4,
-      },
-    }).then(response => {
-      dispatch(readyComposeSuggestions(token, response.data));
-    });
-  };
+  let leading = token[0];
+
+  if (leading === '@') {
+    // handle search
+    return (dispatch, getState) => {
+      api(getState).get('/api/v1/accounts/search', {
+        params: {
+          q: token.slice(1), // remove the '@'
+          resolve: false,
+          limit: 4,
+        },
+      }).then(response => {
+        dispatch(readyComposeSuggestions(token, response.data));
+      });
+    };
+  } else if (leading === ':') {
+    // mojos
+    let allShortcodes = Object.keys(emojione.emojioneList);
+    // TODO when we have custom emojons merged, add theme to this shortcode list
+    return (dispatch) => {
+      dispatch(readyComposeSuggestionsTxt(token, allShortcodes.filter((sc) => {
+        return sc.indexOf(token) === 0;
+      })));
+    };
+  } else {
+    // hashtag
+    return (dispatch, getState) => {
+      api(getState).get('/api/v1/search', {
+        params: {
+          q: token,
+          resolve: true,
+        },
+      }).then(response => {
+        dispatch(readyComposeSuggestionsTxt(token, response.data.hashtags.map((ht) => `#${ht}`)));
+      });
+    };
+  }
 };
 
 export function readyComposeSuggestions(token, accounts) {
@@ -233,9 +261,19 @@ export function readyComposeSuggestions(token, accounts) {
   };
 };
 
+export function readyComposeSuggestionsTxt(token, items) {
+  return {
+    type: COMPOSE_SUGGESTIONS_READY_TXT,
+    token,
+    items,
+  };
+};
+
 export function selectComposeSuggestion(position, token, accountId) {
   return (dispatch, getState) => {
-    const completion = getState().getIn(['accounts', accountId, 'acct']);
+    const completion = (typeof accountId === 'string') ?
+      accountId.slice(1) : // text suggestion: discard the leading : or # - the replacing code replaces only what follows
+      getState().getIn(['accounts', accountId, 'acct']);
 
     dispatch({
       type: COMPOSE_SUGGESTION_SELECT,

app/javascript/mastodon/components/autosuggest_textarea.js

@@ -1,5 +1,6 @@
 import React from 'react';
 import AutosuggestAccountContainer from '../features/compose/containers/autosuggest_account_container';
+import AutosuggestShortcode from '../features/compose/components/autosuggest_shortcode';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import PropTypes from 'prop-types';
 import { isRtl } from '../rtl';
@@ -18,11 +19,12 @@ const textAtCursorMatchesToken = (str, caretPosition) => {
     word = str.slice(left, right + caretPosition);
   }
 
-  if (!word || word.trim().length < 2 || word[0] !== '@') {
+  if (!word || word.trim().length < 2 || ['@', ':', '#'].indexOf(word[0]) === -1) {
     return [null, null];
   }
 
-  word = word.trim().toLowerCase().slice(1);
+  word = word.trim().toLowerCase();
+  // was: .slice(1); - we leave the leading char there, handler can decide what to do based on it
 
   if (word.length > 0) {
     return [left + 1, word];
@@ -128,7 +130,9 @@ export default class AutosuggestTextarea extends ImmutablePureComponent {
   }
 
   onSuggestionClick = (e) => {
-    const suggestion = Number(e.currentTarget.getAttribute('data-index'));
+    // leave suggestion string unchanged if it's a hash / shortcode suggestion. convert account number to int.
+    const suggestionStr = e.currentTarget.getAttribute('data-index');
+    const suggestion = [':', '#'].indexOf(suggestionStr[0]) !== -1 ? suggestionStr : Number(suggestionStr);
     e.preventDefault();
     this.props.onSuggestionSelected(this.state.tokenStart, this.state.lastToken, suggestion);
     this.textarea.focus();
@@ -160,6 +164,14 @@ export default class AutosuggestTextarea extends ImmutablePureComponent {
       style.direction = 'rtl';
     }
 
+    let makeItem = (suggestion) => {
+      if (suggestion[0] === ':') return <AutosuggestShortcode shortcode={suggestion} />;
+      if (suggestion[0] === '#') return suggestion; // hashtag
+
+      // else - accounts are always returned as IDs with no prefix
+      return <AutosuggestAccountContainer id={suggestion} />;
+    };
+
     return (
       <div className='autosuggest-textarea'>
         <label>
@@ -190,7 +202,7 @@ export default class AutosuggestTextarea extends ImmutablePureComponent {
               className={`autosuggest-textarea__suggestions__item ${i === selectedSuggestion ? 'selected' : ''}`}
               onMouseDown={this.onSuggestionClick}
             >
-              <AutosuggestAccountContainer id={suggestion} />
+              {makeItem(suggestion)}
             </div>
           ))}
         </div>

app/javascript/mastodon/features/compose/components/autosuggest_shortcode.js

@@ -0,0 +1,38 @@
+import React from 'react';
+import ImmutablePureComponent from 'react-immutable-pure-component';
+import PropTypes from 'prop-types';
+import emojione from 'emojione';
+
+// This is bad, but I don't know how to make it work without importing the entirety of emojione.
+// taken from some old version of mastodon before they gutted emojione to "emojione_light"
+const shortnameToImage = str => str.replace(emojione.regShortNames, shortname => {
+  if (typeof shortname === 'undefined' || shortname === '' || !(shortname in emojione.emojioneList)) {
+    return shortname;
+  }
+
+  const unicode = emojione.emojioneList[shortname].unicode[emojione.emojioneList[shortname].unicode.length - 1];
+  const alt     = emojione.convert(unicode.toUpperCase());
+
+  return `<img draggable="false" class="emojione" alt="${alt}" src="/emoji/${unicode}.svg" />`;
+});
+
+export default class AutosuggestShortcode extends ImmutablePureComponent {
+
+  static propTypes = {
+    shortcode: PropTypes.string.isRequired,
+  };
+
+  render () {
+    const { shortcode } = this.props;
+
+    let emoji = shortnameToImage(shortcode);
+
+    return (
+      <div className='autosuggest-account'>
+        <div className='autosuggest-account-icon' dangerouslySetInnerHTML={{ __html: emoji }} />
+        {shortcode}
+      </div>
+    );
+  }
+
+}

app/javascript/mastodon/reducers/compose.js

@@ -15,6 +15,7 @@ import {
   COMPOSE_UPLOAD_PROGRESS,
   COMPOSE_SUGGESTIONS_CLEAR,
   COMPOSE_SUGGESTIONS_READY,
+  COMPOSE_SUGGESTIONS_READY_TXT,
   COMPOSE_SUGGESTION_SELECT,
   COMPOSE_ADVANCED_OPTIONS_CHANGE,
   COMPOSE_SENSITIVITY_CHANGE,
@@ -263,6 +264,9 @@ export default function compose(state = initialState, action) {
     return state.update('suggestions', ImmutableList(), list => list.clear()).set('suggestion_token', null);
   case COMPOSE_SUGGESTIONS_READY:
     return state.set('suggestions', ImmutableList(action.accounts.map(item => item.id))).set('suggestion_token', action.token);
+  case COMPOSE_SUGGESTIONS_READY_TXT:
+    // suggestion received that is not an account - hashtag or emojo
+    return state.set('suggestions', ImmutableList(action.items.map(item => item))).set('suggestion_token', action.token);
   case COMPOSE_SUGGESTION_SELECT:
     return insertSuggestion(state, action.position, action.token, action.completion);
   case TIMELINE_DELETE: