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   1  <?PHP
   2  class hotpot_xml_template_default {
   3      function read_template($filename, $tag='temporary') {
   4          // create the file path to the template
   5          $filepath = $this->parent->template_dirpath.DIRECTORY_SEPARATOR.$filename;
   6          // try and open the template file
   7          if (!file_exists($filepath) || !is_readable($filepath)) {
   8              $msg = 'Could not open the '.$this->parent->template_dir.' template file &quot;'.$filepath.'&quot;';
   9              error($msg, $this->parent->course_homeurl);
  10          }
  11          // read in the template and close the file
  12          $this->$tag = file_get_contents($filepath);
  13          // expand the blocks and strings in the template
  14          $this->expand_blocks($tag);
  15          $this->expand_strings($tag);
  16          if ($tag=='temporary') {
  17              $template = $this->$tag;
  18              $this->$tag = '';
  19              return $template;
  20          }
  21      }
  22      function expand_blocks($tag) {
  23          // get block $names
  24          //  [1] the full block name (including optional leading 'str' or 'incl')
  25          //  [2] leading 'incl' or 'str', if any
  26          //  [3] the real block name ([1] without [2])
  27          $search = '/\[\/((incl|str)?((?:\w|\.)+))\]/';
  28          preg_match_all($search, $this->$tag, $names);
  29          $i_max = count($names[0]);
  30          for ($i=0; $i<$i_max; $i++) {
  31              $method = $this->parent->template_dir.'_expand_'.str_replace('.', '', $names[3][$i]);
  32              if (method_exists($this, $method)) {
  33                  eval('$value=$this->'.$method.'();');
  34                  $search = '/\['.$names[1][$i].'\](.*?)\[\/'.$names[1][$i].'\]/s';
  35                  preg_match_all($search, $this->$tag, $blocks);
  36                  $ii_max = count($blocks[0]);
  37                  for ($ii=0; $ii<$ii_max; $ii++) {
  38                      $replace = empty($value) ? '' : $blocks[1][$ii];
  39                      $this->$tag = str_replace($blocks[0][$ii], $replace, $this->$tag);
  40                  }
  41              } else {
  42                  $msg = 'Template block expand method not found: &quot;'.$method.'&quot;';
  43                  error($msg, $this->parent->course_homeurl);
  44              }
  45          }
  46      }
  47      function expand_strings($tag, $search='') {
  48          if (empty($search)) {
  49              // default $search $pattern
  50              $search = '/\[(?:bool|int|str)(\\w+)\]/';
  51          }
  52          preg_match_all($search, $this->$tag, $matches);
  53          $i_max = count($matches[0]);
  54          for ($i=0; $i<$i_max; $i++) {
  55              $method = $this->parent->template_dir.'_expand_'.$matches[1][$i];
  56              if (method_exists($this, $method)) {
  57                  eval('$replace=$this->'.$method.'();');
  58                  $this->$tag = str_replace($matches[0][$i], $replace, $this->$tag);
  59              }
  60          }
  61      }
  62      function bool_value($tags, $more_tags="[0]['#']") {
  63          $value = $this->parent->xml_value($tags, $more_tags);
  64          return empty($value) ? 'false' : 'true';
  65      }
  66      function int_value($tags, $more_tags="[0]['#']") {
  67          return intval($this->parent->xml_value($tags, $more_tags));
  68      }
  69      function js_value($tags, $more_tags="[0]['#']", $convert_to_unicode=false) {
  70          return $this->js_safe($this->parent->xml_value($tags, $more_tags), $convert_to_unicode);
  71      }
  72      function js_safe($str, $convert_to_unicode=false) {
  73          // encode a string for javascript
  74          // decode "<" and ">" - not necesary as it was done by xml_value()
  75          // $str  = strtr($str, array('&#x003C;' => '<', '&#x003E;' => '>'));
  76          // escape single quotes and backslashes
  77          $str = strtr($str, array("'"=>"\\'", '\\'=>'\\\\'));
  78          // convert newlines (win = "\r\n", mac="\r", linix/unix="\n")
  79          $nl = '\\n'; // javascript newline
  80          $str = strtr($str, array("\r\n"=>$nl, "\r"=>$nl, "\n"=>$nl));
  81          // convert (hex and decimal) html entities to unicode, if required
  82          if ($convert_to_unicode) {
  83              $str = preg_replace('|&#x([0-9A-F]+);|i', '\\u\\1', $str);
  84              $str = preg_replace('|&#(\d+);|e', "'\\u'.sprintf('%04X', '\\1')", $str);
  85          }
  86          return $str;
  87      }
  88      function get_halfway_color($x, $y) {
  89          // returns the $color that is half way between $x and $y
  90          $color = $x; // default
  91          $rgb = '/^\#?([0-9a-f])([0-9a-f])([0-9a-f])$/i';
  92          $rrggbb = '/^\#?([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})$/i';
  93          if ((
  94              preg_match($rgb, $x, $x_matches) ||
  95              preg_match($rrggbb, $x, $x_matches)
  96          ) && (
  97              preg_match($rgb, $y, $y_matches) ||
  98              preg_match($rrggbb, $y, $y_matches)
  99          )) {
 100              $color = '#';
 101              for ($i=1; $i<=3; $i++) {
 102                  $x_dec = hexdec($x_matches[$i]);
 103                  $y_dec = hexdec($y_matches[$i]);
 104                  $color .= sprintf('%02x', min($x_dec, $y_dec) + abs($x_dec-$y_dec)/2);
 105              }
 106          }
 107          return $color;
 108      }
 109  }
 110  ?>