GCTC-NTGC / TalentCloud

import React, { useState, useEffect } from "react";

import { countNumberOfWords } from "./helpers";

export interface WordCounterProps {

  /** Id of textarea element */

  elementId: string;

  /** Maximum amount of words before passing the optimal range. The Progress Ring color correlates with this number. */

  maxWords: number;

  /** Minimum amount of words to reach the optimal range. The Progress Ring color correlates with this number. */

  minWords: number;

  /** Keep absolute value of max words - number of words */

  absoluteValue?: boolean;

  /** String before current number of words */

  beforeText?: string;

  /** String after counter when user is under the max */

  underMaxMessage?: string;

  /** String after counter when user is over the max */

  overMaxMessage?: string;

  /** List of clone data style attributes */

  dataAttributes?: { [key: string]: string };

}

const WordCounter: React.FunctionComponent<WordCounterProps> = ({

  elementId,

  minWords,

  maxWords,

  absoluteValue,

  beforeText,

  underMaxMessage,

  overMaxMessage,

  dataAttributes,

}): React.ReactElement => {

  const [numOfWords, setNumOfWords] = useState(0);

  useEffect((): (() => void) => {

    const element: HTMLTextAreaElement = document.getElementById(

      elementId,

    ) as HTMLTextAreaElement;

    setNumOfWords(countNumberOfWords(element.value));

    const handleInputChange = (e: Event): void => {

      const target = e.target as HTMLTextAreaElement;

      setNumOfWords(countNumberOfWords(target.value));

    };

    element.addEventListener("input", handleInputChange);

    return function cleanup(): void {

      element.removeEventListener("input", handleInputChange, false);

    };

  }, [elementId]);

  return (

    <span

      role="progressbar"

      aria-valuenow={numOfWords}

      aria-valuemin={minWords}

      aria-valuemax={maxWords}

      {...dataAttributes}

    >

      {beforeText && <span>{beforeText} </span>}

      <span data-c-color={`${numOfWords <= maxWords ? "go" : "stop"}`}>

        {absoluteValue

          ? Math.abs(maxWords - numOfWords)

          : maxWords - numOfWords}

      </span>

      <span> {numOfWords <= maxWords ? underMaxMessage : overMaxMessage}</span>

    </span>

  );

};

export default WordCounter;