1 files changed, 195 insertions, 0 deletions
diff --git a/src/components/comments/MentionInputControlled.tsx b/src/components/comments/MentionInputControlled.tsx
new file mode 100644
index 00000000..6abcb566
--- /dev/null
+++ b/src/components/comments/MentionInputControlled.tsx
@@ -0,0 +1,195 @@
+import React, {FC, MutableRefObject, useMemo, useRef, useState} from 'react';
+import {
+  NativeSyntheticEvent,
+  Text,
+  TextInput,
+  TextInputSelectionChangeEventData,
+  View,
+} from 'react-native';
+
+import {
+  MentionInputProps,
+  MentionPartType,
+  Suggestion,
+} from 'react-native-controlled-mentions/dist/types';
+import {
+  defaultMentionTextStyle,
+  generateValueFromPartsAndChangedText,
+  generateValueWithAddedSuggestion,
+  getMentionPartSuggestionKeywords,
+  isMentionPartType,
+  parseValue,
+} from 'react-native-controlled-mentions/dist/utils';
+
+const MentionInputControlled: FC<MentionInputProps> = ({
+  value,
+  onChange,
+
+  partTypes = [],
+
+  inputRef: propInputRef,
+
+  containerStyle,
+
+  onSelectionChange,
+
+  ...textInputProps
+}) => {
+  const textInput = useRef<TextInput | null>(null);
+
+  const [selection, setSelection] = useState({start: 0, end: 0});
+
+  const [keyboardText, setKeyboardText] = useState<string>('');
+
+  const validRegex = () => {
+    if (partTypes.length === 0) {
+      return /.*\@[^ ]*$/;
+    } else {
+      return new RegExp(`.*\@${keywordByTrigger[partTypes[0].trigger]}.*$`);
+    }
+  };
+
+  const {plainText, parts} = useMemo(() => parseValue(value, partTypes), [
+    value,
+    partTypes,
+  ]);
+
+  const handleSelectionChange = (
+    event: NativeSyntheticEvent<TextInputSelectionChangeEventData>,
+  ) => {
+    setSelection(event.nativeEvent.selection);
+
+    onSelectionChange && onSelectionChange(event);
+  };
+
+  /**
+   * Callback that trigger on TextInput text change
+   *
+   * @param changedText
+   */
+  const onChangeInput = (changedText: string) => {
+    setKeyboardText(changedText);
+    onChange(
+      generateValueFromPartsAndChangedText(parts, plainText, changedText),
+    );
+  };
+
+  /**
+   * We memoize the keyword to know should we show mention suggestions or not
+   */
+  const keywordByTrigger = useMemo(() => {
+    return getMentionPartSuggestionKeywords(
+      parts,
+      plainText,
+      selection,
+      partTypes,
+    );
+  }, [parts, plainText, selection, partTypes]);
+
+  /**
+   * Callback on mention suggestion press. We should:
+   * - Get updated value
+   * - Trigger onChange callback with new value
+   */
+  const onSuggestionPress = (mentionType: MentionPartType) => (
+    suggestion: Suggestion,
+  ) => {
+    const newValue = generateValueWithAddedSuggestion(
+      parts,
+      mentionType,
+      plainText,
+      selection,
+      suggestion,
+    );
+
+    if (!newValue) {
+      return;
+    }
+
+    onChange(newValue);
+
+    /**
+     * Move cursor to the end of just added mention starting from trigger string and including:
+     * - Length of trigger string
+     * - Length of mention name
+     * - Length of space after mention (1)
+     *
+     * Not working now due to the RN bug
+     */
+    // const newCursorPosition = currentPart.position.start + triggerPartIndex + trigger.length +
+    // suggestion.name.length + 1;
+
+    // textInput.current?.setNativeProps({selection: {start: newCursorPosition, end: newCursorPosition}});
+  };
+
+  const handleTextInputRef = (ref: TextInput) => {
+    textInput.current = ref as TextInput;
+
+    if (propInputRef) {
+      if (typeof propInputRef === 'function') {
+        propInputRef(ref);
+      } else {
+        (propInputRef as MutableRefObject<TextInput>).current = ref as TextInput;
+      }
+    }
+  };
+
+  const renderMentionSuggestions = (mentionType: MentionPartType) => (
+    <React.Fragment key={mentionType.trigger}>
+      {mentionType.renderSuggestions &&
+        mentionType.renderSuggestions({
+          keyword: keywordByTrigger[mentionType.trigger],
+          onSuggestionPress: onSuggestionPress(mentionType),
+        })}
+    </React.Fragment>
+  );
+
+  const validateInput = (testString: string) => {
+    return validRegex().test(testString);
+  };
+
+  return (
+    <View style={containerStyle}>
+      {validateInput(keyboardText)
+        ? (partTypes.filter(
+            (one) =>
+              isMentionPartType(one) &&
+              one.renderSuggestions != null &&
+              !one.isBottomMentionSuggestionsRender,
+          ) as MentionPartType[]).map(renderMentionSuggestions)
+        : null}
+
+      <TextInput
+        multiline
+        {...textInputProps}
+        ref={handleTextInputRef}
+        onChangeText={onChangeInput}
+        onSelectionChange={handleSelectionChange}>
+        <Text>
+          {parts.map(({text, partType, data}, index) =>
+            partType ? (
+              <Text
+                key={`${index}-${data?.trigger ?? 'pattern'}`}
+                style={partType.textStyle ?? defaultMentionTextStyle}>
+                {text}
+              </Text>
+            ) : (
+              <Text key={index}>{text}</Text>
+            ),
+          )}
+        </Text>
+      </TextInput>
+
+      {validateInput(keyboardText)
+        ? (partTypes.filter(
+            (one) =>
+              isMentionPartType(one) &&
+              one.renderSuggestions != null &&
+              one.isBottomMentionSuggestionsRender,
+          ) as MentionPartType[]).map(renderMentionSuggestions)
+        : null}
+    </View>
+  );
+};
+
+export {MentionInputControlled};