multi-downloader-nx_mirror/modules/module.parseSelect.js

/**
 * @param {string} selectString
 * @returns {{
 *  isSelected: (val: string) => boolean,
 *  values: string[]
 * }} 
 */
module.exports = (selectString) => {
  let parts = selectString.split(',');
  let select = [];

  parts.forEach(part => {
    if (part.includes('-')) {
      let splits = part.split('-')
      if (splits.length !== 2) {
        console.log(`[WARN] Unable to parse input "${part}"`)
        return;
      }

      let firstPart = splits[0];
      let match = firstPart.match(/[A-Za-z]+/);
      if (match && match.length > 0) {
        if (match.index && match.index !== 0) {
          console.log(`[WARN] Unable to parse input "${part}"`)
          return;
        }
        let letters = firstPart.substring(0, match[0].length)
        let number = parseInt(firstPart.substring(match[0].length))
        let b = parseInt(splits[1]);
        if (isNaN(number) || isNaN(b)) {
          console.log(`[WARN] Unable to parse input "${part}"`)
          return;
        }
        for (let i = number; i <= b; i++) {
          select.push(`${letters}${i}`);
        }

      } else {
        let a = parseInt(firstPart);
        let b = parseInt(splits[1])
        if (isNaN(a) || isNaN(b)) {
          console.log(`[WARN] Unable to parse input "${part}"`)
          return;
        }
        for (let i = a; i <= b; i++) {
          select.push(`${i}`);
        }
      }

    } else {
      select.push(part)
    }
  })

  return {
    values: select,
    isSelected: (st) => {
      let match = st.match(/[A-Za-z]+/);
      if (match && match.length > 0) {
        if (match.index && match.index !== 0) {
          return false;
        }
        let letter = st.substring(0, match[0].length);
        let number = parseInt(st.substring(match[0].length))
        if (isNaN(number)) {
          return false;
        }

        return select.includes(`${letter}${number}`)
      } else {
        return select.includes(`${parseInt(st)}`)
      }
    }
  };
}