SnTemplate::cacheFiles()

Complexity

Conditions	11
Paths	24

Size

Total Lines	48
Code Lines	21

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
  protected static function cacheFiles($fileList, $extension = '.css') {
    // Calculating file key which include all used filenames and modification time for them
    $key          = '';
    $filesToMerge = [];
    foreach ($fileList as $fileName => $aContent) {
      // If content empty - index is a filename
      if (empty($aContent)) {
        // Checking file modification time. Also we will check if file exists
        if ($fileMTime = filemtime(SN_ROOT_PHYSICAL . $fileName)) {
          // Generating key
          $key .= "$fileName:" . date(FMT_DATE_TIME_SQL, $fileMTime) . "\n";
          // Adding filename to list of merge
          $filesToMerge[$fileName] = "$fileName:" . date(FMT_DATE_TIME_SQL, $fileMTime);
        }
      }
    }
    // Name we will be using to address this file
    $cacheFileName = 'design/cache/' . md5($key) . $extension;
    // If no file exists - trying to create it
    if (!file_exists($fullCacheFileName = SN_ROOT_PHYSICAL . $cacheFileName)) {
      // Caching several files into one
      $contentToCache = '';
      foreach ($filesToMerge as $fileName => $temp) {
        if (file_exists($fName = SN_ROOT_PHYSICAL . $fileName) && !empty($content = file_get_contents($fName))) {
          // Adding content of cached file
          $contentToCache .= $content . "\n";
          // Marking that file was read OK - for future debug purposes if any
          $filesToMerge[$fileName] .= " - OK\n";
        }
      }
      // If we have something to cache...
      if (!empty($contentToCache)) {
        // /* */ works as comment for both JS and CSS
        file_put_contents($fullCacheFileName, "/* Generated content. Safe to delete\n" . implode('', $filesToMerge) . "*/\n\n" . $contentToCache);
      }
    }

    // If CSS cache exists for current combination of files
    if (file_exists($fullCacheFileName)) {
      // Removing from list all CSS files that already in cache
      foreach ($filesToMerge as $fileName => $temp) {
        unset($fileList[$fileName]);
      }
      // Adding to list cache file
      $fileList = [$cacheFileName => ''] + $fileList;
    }

    return $fileList;
  }