From df52004fe6de0a8f21e97967f9d9d8a5fc945465 Mon Sep 17 00:00:00 2001
From: Thibaut Girka <thib@sitedethib.com>
Date: Thu, 11 Apr 2019 17:18:55 +0200
Subject: [PATCH] Add suggestions in CW field

---
 .../glitch/components/autosuggest_input.js    | 227 ++++++++++++++++++
 .../glitch/components/autosuggest_textarea.js |  10 +-
 .../compose/components/compose_form.js        |  40 +--
 .../containers/compose_form_container.js      |   4 +-
 4 files changed, 260 insertions(+), 21 deletions(-)
 create mode 100644 app/javascript/flavours/glitch/components/autosuggest_input.js

diff --git a/app/javascript/flavours/glitch/components/autosuggest_input.js b/app/javascript/flavours/glitch/components/autosuggest_input.js
new file mode 100644
index 0000000000..7de9f23076
--- /dev/null
+++ b/app/javascript/flavours/glitch/components/autosuggest_input.js
@@ -0,0 +1,227 @@
+import React from 'react';
+import AutosuggestAccountContainer from 'flavours/glitch/features/compose/containers/autosuggest_account_container';
+import AutosuggestEmoji from './autosuggest_emoji';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import PropTypes from 'prop-types';
+import { isRtl } from 'flavours/glitch/util/rtl';
+import ImmutablePureComponent from 'react-immutable-pure-component';
+import classNames from 'classnames';
+import { List as ImmutableList } from 'immutable';
+
+const textAtCursorMatchesToken = (str, caretPosition, searchTokens) => {
+  let word;
+
+  let left  = str.slice(0, caretPosition).search(/[^\s\u200B]+$/);
+  let right = str.slice(caretPosition).search(/[\s\u200B]/);
+
+  if (right < 0) {
+    word = str.slice(left);
+  } else {
+    word = str.slice(left, right + caretPosition);
+  }
+
+  if (!word || word.trim().length < 3 || searchTokens.indexOf(word[0]) === -1) {
+    return [null, null];
+  }
+
+  word = word.trim().toLowerCase();
+
+  if (word.length > 0) {
+    return [left, word];
+  } else {
+    return [null, null];
+  }
+};
+
+export default class AutosuggestInput extends ImmutablePureComponent {
+
+  static propTypes = {
+    value: PropTypes.string,
+    suggestions: ImmutablePropTypes.list,
+    disabled: PropTypes.bool,
+    placeholder: PropTypes.string,
+    onSuggestionSelected: PropTypes.func.isRequired,
+    onSuggestionsClearRequested: PropTypes.func.isRequired,
+    onSuggestionsFetchRequested: PropTypes.func.isRequired,
+    onChange: PropTypes.func.isRequired,
+    onKeyUp: PropTypes.func,
+    onKeyDown: PropTypes.func,
+    autoFocus: PropTypes.bool,
+    className: PropTypes.string,
+    id: PropTypes.string,
+    searchTokens: PropTypes.list,
+  };
+
+  static defaultProps = {
+    autoFocus: true,
+    searchTokens: ImmutableList(['@', ':', '#']),
+  };
+
+  state = {
+    suggestionsHidden: false,
+    focused: false,
+    selectedSuggestion: 0,
+    lastToken: null,
+    tokenStart: 0,
+  };
+
+  onChange = (e) => {
+    const [ tokenStart, token ] = textAtCursorMatchesToken(e.target.value, e.target.selectionStart, this.props.searchTokens);
+
+    if (token !== null && this.state.lastToken !== token) {
+      this.setState({ lastToken: token, selectedSuggestion: 0, tokenStart });
+      this.props.onSuggestionsFetchRequested(token);
+    } else if (token === null) {
+      this.setState({ lastToken: null });
+      this.props.onSuggestionsClearRequested();
+    }
+
+    this.props.onChange(e);
+  }
+
+  onKeyDown = (e) => {
+    const { suggestions, disabled } = this.props;
+    const { selectedSuggestion, suggestionsHidden } = this.state;
+
+    if (disabled) {
+      e.preventDefault();
+      return;
+    }
+
+    if (e.which === 229 || e.isComposing) {
+      // Ignore key events during text composition
+      // e.key may be a name of the physical key even in this case (e.x. Safari / Chrome on Mac)
+      return;
+    }
+
+    switch(e.key) {
+    case 'Escape':
+      if (suggestions.size === 0 || suggestionsHidden) {
+        document.querySelector('.ui').parentElement.focus();
+      } else {
+        e.preventDefault();
+        this.setState({ suggestionsHidden: true });
+      }
+
+      break;
+    case 'ArrowDown':
+      if (suggestions.size > 0 && !suggestionsHidden) {
+        e.preventDefault();
+        this.setState({ selectedSuggestion: Math.min(selectedSuggestion + 1, suggestions.size - 1) });
+      }
+
+      break;
+    case 'ArrowUp':
+      if (suggestions.size > 0 && !suggestionsHidden) {
+        e.preventDefault();
+        this.setState({ selectedSuggestion: Math.max(selectedSuggestion - 1, 0) });
+      }
+
+      break;
+    case 'Enter':
+    case 'Tab':
+      // Select suggestion
+      if (this.state.lastToken !== null && suggestions.size > 0 && !suggestionsHidden) {
+        e.preventDefault();
+        e.stopPropagation();
+        this.props.onSuggestionSelected(this.state.tokenStart, this.state.lastToken, suggestions.get(selectedSuggestion));
+      }
+
+      break;
+    }
+
+    if (e.defaultPrevented || !this.props.onKeyDown) {
+      return;
+    }
+
+    this.props.onKeyDown(e);
+  }
+
+  onBlur = () => {
+    this.setState({ suggestionsHidden: true, focused: false });
+  }
+
+  onFocus = () => {
+    this.setState({ focused: true });
+  }
+
+  onSuggestionClick = (e) => {
+    const suggestion = this.props.suggestions.get(e.currentTarget.getAttribute('data-index'));
+    e.preventDefault();
+    this.props.onSuggestionSelected(this.state.tokenStart, this.state.lastToken, suggestion);
+    this.input.focus();
+  }
+
+  componentWillReceiveProps (nextProps) {
+    if (nextProps.suggestions !== this.props.suggestions && nextProps.suggestions.size > 0 && this.state.suggestionsHidden && this.state.focused) {
+      this.setState({ suggestionsHidden: false });
+    }
+  }
+
+  setInput = (c) => {
+    this.input = c;
+  }
+
+  renderSuggestion = (suggestion, i) => {
+    const { selectedSuggestion } = this.state;
+    let inner, key;
+
+    if (typeof suggestion === 'object') {
+      inner = <AutosuggestEmoji emoji={suggestion} />;
+      key   = suggestion.id;
+    } else if (suggestion[0] === '#') {
+      inner = suggestion;
+      key   = suggestion;
+    } else {
+      inner = <AutosuggestAccountContainer id={suggestion} />;
+      key   = suggestion;
+    }
+
+    return (
+      <div role='button' tabIndex='0' key={key} data-index={i} className={classNames('autosuggest-textarea__suggestions__item', { selected: i === selectedSuggestion })} onMouseDown={this.onSuggestionClick}>
+        {inner}
+      </div>
+    );
+  }
+
+  render () {
+    const { value, suggestions, disabled, placeholder, onKeyUp, autoFocus, className, id } = this.props;
+    const { suggestionsHidden } = this.state;
+    const style = { direction: 'ltr' };
+
+    if (isRtl(value)) {
+      style.direction = 'rtl';
+    }
+
+    return (
+      <div className='autosuggest-input'>
+        <label>
+          <span style={{ display: 'none' }}>{placeholder}</span>
+
+          <input
+            type='text'
+            ref={this.setInput}
+            disabled={disabled}
+            placeholder={placeholder}
+            autoFocus={autoFocus}
+            value={value}
+            onChange={this.onChange}
+            onKeyDown={this.onKeyDown}
+            onKeyUp={onKeyUp}
+            onFocus={this.onFocus}
+            onBlur={this.onBlur}
+            style={style}
+            aria-autocomplete='list'
+            id={id}
+            className={className}
+          />
+        </label>
+
+        <div className={`autosuggest-textarea__suggestions ${suggestionsHidden || suggestions.isEmpty() ? '' : 'autosuggest-textarea__suggestions--visible'}`}>
+          {suggestions.map(this.renderSuggestion)}
+        </div>
+      </div>
+    );
+  }
+
+}
diff --git a/app/javascript/flavours/glitch/components/autosuggest_textarea.js b/app/javascript/flavours/glitch/components/autosuggest_textarea.js
index af8fbe4065..2be29feb49 100644
--- a/app/javascript/flavours/glitch/components/autosuggest_textarea.js
+++ b/app/javascript/flavours/glitch/components/autosuggest_textarea.js
@@ -56,6 +56,7 @@ export default class AutosuggestTextarea extends ImmutablePureComponent {
 
   state = {
     suggestionsHidden: false,
+    focused: false,
     selectedSuggestion: 0,
     lastToken: null,
     tokenStart: 0,
@@ -134,7 +135,11 @@ export default class AutosuggestTextarea extends ImmutablePureComponent {
   }
 
   onBlur = () => {
-    this.setState({ suggestionsHidden: true });
+    this.setState({ suggestionsHidden: true, focused: false });
+  }
+
+  onFocus = () => {
+    this.setState({ focused: true });
   }
 
   onSuggestionClick = (e) => {
@@ -145,7 +150,7 @@ export default class AutosuggestTextarea extends ImmutablePureComponent {
   }
 
   componentWillReceiveProps (nextProps) {
-    if (nextProps.suggestions !== this.props.suggestions && nextProps.suggestions.size > 0 && this.state.suggestionsHidden) {
+    if (nextProps.suggestions !== this.props.suggestions && nextProps.suggestions.size > 0 && this.state.suggestionsHidden && this.state.focused) {
       this.setState({ suggestionsHidden: false });
     }
   }
@@ -207,6 +212,7 @@ export default class AutosuggestTextarea extends ImmutablePureComponent {
             onChange={this.onChange}
             onKeyDown={this.onKeyDown}
             onKeyUp={onKeyUp}
+            onFocus={this.onFocus}
             onBlur={this.onBlur}
             onPaste={this.onPaste}
             style={style}
diff --git a/app/javascript/flavours/glitch/features/compose/components/compose_form.js b/app/javascript/flavours/glitch/features/compose/components/compose_form.js
index a5e34e3a29..bd6d5b1fa0 100644
--- a/app/javascript/flavours/glitch/features/compose/components/compose_form.js
+++ b/app/javascript/flavours/glitch/features/compose/components/compose_form.js
@@ -3,6 +3,7 @@ import ImmutablePropTypes from 'react-immutable-proptypes';
 import PropTypes from 'prop-types';
 import ReplyIndicatorContainer from '../containers/reply_indicator_container';
 import AutosuggestTextarea from '../../../components/autosuggest_textarea';
+import AutosuggestInput from '../../../components/autosuggest_input';
 import { defineMessages, injectIntl } from 'react-intl';
 import EmojiPicker from 'flavours/glitch/features/emoji_picker';
 import PollFormContainer from '../containers/poll_form_container';
@@ -163,7 +164,11 @@ class ComposeForm extends ImmutablePureComponent {
 
   //  Selects a suggestion from the autofill.
   onSuggestionSelected = (tokenStart, token, value) => {
-    this.props.onSuggestionSelected(tokenStart, token, value);
+    this.props.onSuggestionSelected(tokenStart, token, value, ['text']);
+  }
+
+  onSpoilerSuggestionSelected = (tokenStart, token, value) => {
+    this.props.onSuggestionSelected(tokenStart, token, value, ['spoiler_text']);
   }
 
   //  When the escape key is released, we focus the UI.
@@ -183,7 +188,7 @@ class ComposeForm extends ImmutablePureComponent {
   //  Sets a reference to the CW field.
   handleRefSpoilerText = (spoilerComponent) => {
     if (spoilerComponent) {
-      this.spoilerText = spoilerComponent;
+      this.spoilerText = spoilerComponent.input;
     }
   }
 
@@ -303,21 +308,22 @@ class ComposeForm extends ImmutablePureComponent {
         <ReplyIndicatorContainer />
 
         <div className={`composer--spoiler ${spoiler ? 'composer--spoiler--visible' : ''}`}>
-          <label>
-            <span style={{ display: 'none' }}>{intl.formatMessage(messages.spoiler_placeholder)}</span>
-            <input
-              id='glitch.composer.spoiler.input'
-              placeholder={intl.formatMessage(messages.spoiler_placeholder)}
-              value={spoilerText}
-              onChange={this.handleChangeSpoiler}
-              onKeyDown={this.handleKeyDown}
-              onKeyUp={this.handleKeyUp}
-              disabled={!spoiler}
-              type='text'
-              className='spoiler-input__input'
-              ref={this.handleRefSpoilerText}
-            />
-          </label>
+          <AutosuggestInput
+            placeholder={intl.formatMessage(messages.spoiler_placeholder)}
+            value={spoilerText}
+            onChange={this.handleChangeSpoiler}
+            onKeyDown={this.handleKeyDown}
+            onKeyUp={this.handleKeyUp}
+            disabled={!spoiler}
+            ref={this.handleRefSpoilerText}
+            suggestions={this.props.suggestions}
+            onSuggestionsFetchRequested={onFetchSuggestions}
+            onSuggestionsClearRequested={onClearSuggestions}
+            onSuggestionSelected={this.onSpoilerSuggestionSelected}
+            searchTokens={[':']}
+             id='glitch.composer.spoiler.input'
+             className='spoiler-input__input'
+          />
         </div>
 
         <div className='composer--textarea'>
diff --git a/app/javascript/flavours/glitch/features/compose/containers/compose_form_container.js b/app/javascript/flavours/glitch/features/compose/containers/compose_form_container.js
index 780a10f810..2da0770d32 100644
--- a/app/javascript/flavours/glitch/features/compose/containers/compose_form_container.js
+++ b/app/javascript/flavours/glitch/features/compose/containers/compose_form_container.js
@@ -90,8 +90,8 @@ const mapDispatchToProps = (dispatch, { intl }) => ({
     dispatch(fetchComposeSuggestions(token));
   },
 
-  onSuggestionSelected(position, token, suggestion) {
-    dispatch(selectComposeSuggestion(position, token, suggestion, ['text']));
+  onSuggestionSelected(position, token, suggestion, path) {
+    dispatch(selectComposeSuggestion(position, token, suggestion, path));
   },
 
   onChangeSpoilerText(text) {