mush-format/plugins/core/compress.js

A javascript library that minifies pretty formatted mushcode.

module.exports = (data, next) => {
  // remove comments
  const compressed = data.raw
    .replace(/\/\*[\s\S]*?\*\/|([^:]|^)\/\/.*$/gm, "") // remove comments
    .replace(/^#.*/gim, "") // remove unevaluated meta tags
    .split("\n")
    .filter(Boolean)
    .reduce((acc, curr) => {
      // if the first column isn't blank, it's a new line, else append it
      // to the line before.
      curr = curr.trimRight();
      curr = curr.replace(/\t/g, " "); // replace tabs.  O.o
      if (curr.match(/^[^\t\r\n\s]/)) curr = `\n${curr}`;

      curr = curr
        .replace(/\r/g, "") // remove returns
        .replace(/^\n-/g, "\n"); // replace dashes

      return (acc += curr);
    }, "")
    .replace(/\]\s+?\[/g, "][") // remove spaces between braackets.
    .replace(/\s+?=\s+?|=\s+?|\s+?=/g, "=") // remove spaces around '='
    .replace(/\s?%([rst])\s?/gi, "%$1") // replace spaces around substitutions.
    .replace(/\t|\s\s+/g, " ") // Remove extra spaces (and tabs!)
    .replace(/\)\s|\)\t|\s+\)/g, ")")
    .replace(/([\S])\)/g, "$1 )")
    .replace(/\)\s\)/g, "))"); // Remove spaces on ending parens.
  // generate headers
  if (data.headers.length > 0) {
    data.output +=
      "@@ ========================================================\n";
    data.headers.forEach(header => {
      data.output += `@@ ${header.name.toUpperCase().padEnd(10)} ${
        header.value
      }\n`;
    });
    data.output +=
      "@@ ========================================================\n";
  }

  data.output += compressed;

  // generate footers
  if (data.footers.length > 0) {
    data.output +=
      "@@ ========================================================\n";
    data.footers.forEach(footer => {
      data.output += `@@ ${footer.name.toUpperCase().padEnd(10)} ${
        footer.value
      }\n`;
    });
    data.output +=
      "@@ ========================================================\n";
  }

  next(null, data);
};