php-dist

#!/usr/bin/env node
'use strict';

/**
 * php-dist — single-file edition
 *
 * Usage: node php-dist
 *
 * Reads dist/index.html, injects PHP includes, strips <title> and
 * <meta name="description">, prepends _init.php, and writes dist/index.php.
 * Replicates the behaviour of `php sync-dist.php`.
 */

const fs   = require('fs');
const path = require('path');

// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------

/** Minimal colour helpers — same feel as the PHP tput calls */
const green = (s) => `\x1b[32m${s}\x1b[0m`;
const red   = (s) => `\x1b[31m${s}\x1b[0m`;
const hr    = '~~~~~~~~~~';

/**
 * Remove every occurrence of a tag (and its contents) that matches a
 * predicate.  We do this with a regex-free string walk so we never need
 * a full DOM parser dependency.
 *
 * @param {string} html
 * @param {string} tagName  — lower-case tag name, e.g. 'title' or 'meta'
 * @param {(attrs: string) => boolean} predicate
 * @returns {string}
 */
function removeTags(html, tagName, predicate) {
  const result = [];
  let i = 0;

  while (i < html.length) {
    // Look for the opening '<'
    const openAngle = html.indexOf('<', i);
    if (openAngle === -1) { result.push(html.slice(i)); break; }

    // Collect everything up to this '<'
    result.push(html.slice(i, openAngle));

    // Find the end of this tag
    const closeAngle = html.indexOf('>', openAngle);
    if (closeAngle === -1) { result.push(html.slice(openAngle)); break; }

    const rawTag   = html.slice(openAngle + 1, closeAngle); // e.g. 'meta name="description" ...'
    const isSelfClosing = rawTag.endsWith('/');
    const tagBody  = isSelfClosing ? rawTag.slice(0, -1).trim() : rawTag.trim();
    const spaceIdx = tagBody.search(/[\s/]/);
    const tag      = (spaceIdx === -1 ? tagBody : tagBody.slice(0, spaceIdx)).toLowerCase();
    const attrs    = spaceIdx === -1 ? '' : tagBody.slice(spaceIdx);

    if (tag === tagName && predicate(attrs)) {
      // For void / self-closing elements (like <meta>) there is no closing tag.
      const voidElements = new Set(['area','base','br','col','embed','hr','img','input',
                                    'link','meta','param','source','track','wbr']);
      if (voidElements.has(tagName) || isSelfClosing) {
        // Just skip the tag entirely — move past '>'
        i = closeAngle + 1;
      } else {
        // Skip tag + inner content + closing tag
        const closing = `</${tagName}>`;
        const closeIdx = html.toLowerCase().indexOf(closing, closeAngle + 1);
        if (closeIdx === -1) {
          // No closing tag found — skip just the opening tag
          i = closeAngle + 1;
        } else {
          i = closeIdx + closing.length;
        }
      }
    } else {
      // Not a match — keep it
      result.push(`<${rawTag}>`);
      i = closeAngle + 1;
    }
  }

  return result.join('');
}

// ---------------------------------------------------------------------------
// Main
// ---------------------------------------------------------------------------

(function main() {
  const cwd       = process.cwd();
  const inputFile = path.join(cwd, 'dist', 'index.html');
  const outputFile = path.join(cwd, 'dist', 'index.php');

  if (!fs.existsSync(inputFile)) {
    console.log(hr);
    console.log(red('Run "ember build -prod" before syncing with PHP.'));
    console.log(hr);
    process.exit(1);
  }

  let html = fs.readFileSync(inputFile, 'utf8');

  // Inject PHP includes ---------------------------------------------------

  // Before <title>: _head.php
  html = html.replace('<title>', '<?php include_once("_head.php");?><title>');

  // Before </head>: _head_footer.php
  html = html.replace('</head>', '<?php include_once("_head_footer.php");?></head>');

  // Before </body>: _body_footer.php
  html = html.replace('</body>', '<?php include_once("_body_footer.php");?></body>');

  // Remove <meta name="description"> ------------------------------------
  html = removeTags(html, 'meta', (attrs) => {
    // Match name="description" or name='description'
    return /name\s*=\s*["']description["']/i.test(attrs);
  });

  // Remove <title>…</title> --------------------------------------------
  html = removeTags(html, 'title', () => true);

  // Prepend _init.php ---------------------------------------------------
  html = '<?php include_once("_init.php");?>' + html;

  // Write output --------------------------------------------------------
  fs.writeFileSync(outputFile, html, 'utf8');

  console.log(hr);
  console.log(green('Middleware successfully installed. Synced "/dist" folder with PHP.'));
  console.log(hr);
})();