show-rules.js

/*  *************************************************************************************
 *   copyright: Copyright (c) 2021 Lowell D. Thomas, all rights reserved
 *     license: BSD-2-Clause (https://opensource.org/licenses/BSD-2-Clause)
 *   ********************************************************************************* */
module.exports = (function exfn() {
  const thisFileName = 'show-rules.js';

  const showRules = function showRules(rulesIn = [], udtsIn = [], order = 'index') {
    const thisFuncName = 'showRules';
    let alphaArray = [];
    let udtAlphaArray = [];
    const indexArray = [];
    const udtIndexArray = [];
    const rules = rulesIn;
    const udts = udtsIn;
    const ruleCount = rulesIn.length;
    const udtCount = udtsIn.length;
    let str = 'RULE/UDT NAMES';
    let i;
    function compRulesAlpha(left, right) {
      if (rules[left].lower < rules[right].lower) {
        return -1;
      }
      if (rules[left].lower > rules[right].lower) {
        return 1;
      }
      return 0;
    }
    function compUdtsAlpha(left, right) {
      if (udts[left].lower < udts[right].lower) {
        return -1;
      }
      if (udts[left].lower > udts[right].lower) {
        return 1;
      }
      return 0;
    }
    if (!(Array.isArray(rulesIn) && rulesIn.length)) {
      throw new Error(`${thisFileName}:${thisFuncName}: rules arg must be array with length > 0`);
    }
    if (!Array.isArray(udtsIn)) {
      throw new Error(`${thisFileName}:${thisFuncName}: udts arg must be array`);
    }

    for (i = 0; i < ruleCount; i += 1) {
      indexArray.push(i);
    }
    alphaArray = indexArray.slice(0);
    alphaArray.sort(compRulesAlpha);
    if (udtCount) {
      for (i = 0; i < udtCount; i += 1) {
        udtIndexArray.push(i);
      }
      udtAlphaArray = udtIndexArray.slice(0);
      udtAlphaArray.sort(compUdtsAlpha);
    }
    if (order.charCodeAt(0) === 97) {
      str += ' - alphabetical by rule/UDT name\n';
      for (i = 0; i < ruleCount; i += 1) {
        str += `${i}: ${alphaArray[i]}: ${rules[alphaArray[i]].name}\n`;
      }
      if (udtCount) {
        for (i = 0; i < udtCount; i += 1) {
          str += `${i}: ${udtAlphaArray[i]}: ${udts[udtAlphaArray[i]].name}\n`;
        }
      }
    } else {
      str += ' - ordered by rule/UDT index\n';
      for (i = 0; i < ruleCount; i += 1) {
        str += `${i}: ${rules[i].name}\n`;
      }
      if (udtCount) {
        for (i = 0; i < udtCount; i += 1) {
          str += `${i}: ${udts[i].name}\n`;
        }
      }
    }
    return str;
  };
  return showRules;
})();