fix-captcha/dist/Captcha.js

A customizable Captcha component for React.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.generateCaptchaText = exports.default = void 0;
var _react = _interopRequireWildcard(require("react"));
var _io = require("react-icons/io");
function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function (e) { return e ? t : r; })(e); }
function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != typeof e && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && {}.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n.default = e, t && t.set(e, n), n; }
//App.js

const generateRandomChar = (min, max) => String.fromCharCode(Math.floor(Math.random() * (max - min + 1) + min));
const generateCaptchaText = length => {
  let captcha = '';
  for (let i = 0; i < length / 3; i++) {
    captcha += generateRandomChar(65, 90);
    captcha += generateRandomChar(97, 122);
    captcha += generateRandomChar(48, 57);
  }
  return captcha.split('').sort(() => Math.random() - 0.5).join('');
};
exports.generateCaptchaText = generateCaptchaText;
function Captcha(_ref) {
  let {
    refreshIconColor,
    refreshIconSize,
    placeholder,
    styles,
    length,
    textColor1,
    textColor2,
    initialSpace,
    fontSize,
    fontFamily,
    canvasContainerStyle,
    buttonStyle,
    canvasStyle,
    canvasHeight,
    canvasWidth,
    inputStyle
  } = _ref;
  const [captchaText, setCaptchaText] = (0, _react.useState)('');
  const [userInput, setUserInput] = (0, _react.useState)('');
  const canvasRef = (0, _react.useRef)(null);
  (0, _react.useEffect)(() => {
    const canvas = canvasRef.current;
    const ctx = canvas.getContext('2d');
    initializeCaptcha(ctx);
  }, []);
  const drawCaptchaOnCanvas = (ctx, captcha) => {
    ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
    const textColors = [textColor1, textColor2];
    const letterSpace = 150 / captcha.length;
    for (let i = 0; i < captcha.length; i++) {
      const xInitialSpace = initialSpace;
      ctx.font = fontSize + " " + fontFamily;
      ctx.fillStyle = textColors[Math.floor(Math.random() * 2)];
      ctx.fillText(captcha[i], xInitialSpace + i * letterSpace,
      // Randomize Y position slightly
      Math.floor(Math.random() * 16 + 25), 100);
    }
  };
  const initializeCaptcha = ctx => {
    setUserInput('');
    const newCaptcha = generateCaptchaText(length);
    setCaptchaText(newCaptcha);
    drawCaptchaOnCanvas(ctx, newCaptcha);
  };
  const handleUserInputChange = e => {
    setUserInput(e.target.value);
  };
  return /*#__PURE__*/_react.default.createElement("div", {
    style: styles
  }, /*#__PURE__*/_react.default.createElement("div", {
    style: canvasContainerStyle
  }, /*#__PURE__*/_react.default.createElement("canvas", {
    ref: canvasRef,
    width: canvasWidth,
    height: canvasHeight,
    style: canvasStyle
  }), /*#__PURE__*/_react.default.createElement("button", {
    type: "reset",
    style: buttonStyle,
    onClick: () => initializeCaptcha(canvasRef.current.getContext('2d'))
  }, /*#__PURE__*/_react.default.createElement(_io.IoMdRefresh, {
    color: refreshIconColor,
    size: refreshIconSize
  }))), /*#__PURE__*/_react.default.createElement("input", {
    type: "text",
    style: inputStyle,
    placeholder: placeholder,
    value: userInput,
    onChange: handleUserInputChange
  }));
}
var _default = exports.default = Captcha;