wtrmln/libs/cache.php

   1 <?php
   2 /********************************************************************
   3
   4   Watermelon CMS
   5
   6 Copyright 2009 Radosław Pietruszewski
   7
   8 This program is free software; you can redistribute it and/or
   9 modify it under the terms of the GNU General Public License
  10 version 2 as published by the Free Software Foundation.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20
  21 ********************************************************************/
  22
  23 /*
  24  * Lib Cache
  25  * wersja 1.1.0
  26  *
  27  * Cache'owanie
  28  *
  29  */
  30
  31 class Cache
  32 {
  33    /*
  34     * public static void CacheView(string $name, string $content)
  35     *
  36     * cache'uje widok o nazwie $name z treścią $content
  37     *
  38     * string $name    - nazwa widoku, wraz z folderem i końcówką .php
  39     *                   np. 'pw/pwlist.php'
  40     * string $content - treść widoku do zacache'owania
  41     */
  42
  43    public static function CacheView($name, $content)
  44    {
  45       if(strpos($name, '/') === false)
  46       {
  47          $fp = fopen(WTRMLN_CACHE . 'views/'  . $name, 'w');
  48          fwrite($fp, $content);
  49          fclose($fp);
  50       }
  51       else
  52       {
  53          $name = explode('/', $name);
  54          $dir = $name[0];
  55          $name = $name[1];
  56
  57          if(!file_exists(WTRMLN_CACHE . 'views/' . $dir))
  58          {
  59             mkdir(WTRMLN_CACHE . 'views/' . $dir);
  60          }
  61
  62          $fp = fopen(WTRMLN_CACHE . 'views/' . $dir . '/' . $name, 'w');
  63          fwrite($fp, $content);
  64          fclose($fp);
  65       }
  66    }
  67
  68    /*
  69     * public static string GetView(string $name)
  70     *
  71     * zwraca zacache'owany widok o nazwie $name
  72     * zwraca false gdy widok wcale nie został zacache'owany
  73     *
  74     * string $name    - nazwa widoku, wraz z folderem i końcówką .php
  75     *                   np. 'pw/pwlist.php'
  76     */
  77
  78    public static function GetView($name)
  79    {
  80       $name = explode('/', $name);
  81       $dir = $name[0];
  82       $name = $name[1];
  83
  84       $path = WTRMLN_CACHE . 'views/' . $dir . '/' . $name;
  85
  86       if(!file_exists($path))
  87       {
  88          return false;
  89       }
  90
  91       return file_get_contents($path);
  92    }
  93
  94    /*
  95     * public static void CacheBBCode(string $bbcode, string $parsed)
  96     *
  97     * cache'uje fragment treści bbcode
  98     *
  99     * string $bbcode - fragment bbcode do zacache'owania
 100     * string $parsed - ten sam fragment, ale po parsowaniu
 101     */
 102
 103    public static function CacheBBCode($bbcode, $parsed)
 104    {
 105       $bbcodehash = strHash($bbcode);
 106
 107       $fp = fopen(WTRMLN_CACHE . 'bbcode/' . $bbcodehash . '.php', 'w');
 108       fwrite($fp, '<?php exit; ?>' . $parsed);
 109       fclose($fp);
 110    }
 111
 112    /*
 113     * public static string GetBBCode(string $bbcode)
 114     *
 115     * pobiera i zwraca sparsowaną formę BBCode'u
 116     * o treści $bbcode
 117     */
 118
 119    public static function GetBBCode($bbcode)
 120    {
 121       $bbcodehash = strHash($bbcode);
 122
 123       $path = WTRMLN_CACHE . 'bbcode/' . $bbcodehash . '.php';
 124
 125       if(!file_exists($path))
 126       {
 127          return false;
 128       }
 129
 130       return substr(file_get_contents($path), 14);
 131    }
 132
 133    /*
 134     * public static void ClearCache()
 135     *
 136     * czyści cache
 137     */
 138
 139    public static function ClearCache()
 140    {
 141       foreach(new DirectoryIterator(WTRMLN_CACHE . 'views/') as $_res)
 142       {
 143          if($_res->isDot())
 144          {
 145             unset($_res);
 146             continue;
 147          }
 148
 149          if($_res->isFile())
 150          {
 151             self::removeResource($_res->getPathName());
 152          }
 153          elseif($_res->isDir())
 154          {
 155             self::removeResource($_res->getRealPath());
 156          }
 157
 158          unset($_res);
 159       }
 160
 161       foreach(new DirectoryIterator(WTRMLN_CACHE . 'bbcode/') as $_res)
 162       {
 163          if($_res->isDot())
 164          {
 165             unset($_res);
 166             continue;
 167          }
 168
 169          if($_res->isFile())
 170          {
 171             self::removeResource($_res->getPathName());
 172          }
 173          elseif($_res->isDir())
 174          {
 175             self::removeResource($_res->getRealPath());
 176          }
 177
 178          unset($_res);
 179       }
 180    }
 181
 182    /*
 183     * private static void removeResource(string $_target)
 184     *
 185     * niszczy zasób (folder lub plik)
 186     *
 187     * based on http://pl.php.net/manual/pl/function.rmdir.php#86112
 188     *
 189     * string $_target - ścieżka zasobu do usunięcia
 190     */
 191
 192    private static function removeResource($_target)
 193    {
 194       if(is_file($_target))
 195       {
 196          if(is_writable($_target))
 197          {
 198             if(@unlink($_target))
 199             {
 200                return true;
 201             }
 202          }
 203
 204          return false;
 205       }
 206
 207       if(is_dir($_target))
 208       {
 209          if(is_writeable($_target))
 210          {
 211             foreach(new DirectoryIterator($_target) as $_res)
 212             {
 213                if($_res->isDot())
 214                {
 215                   unset($_res);
 216                   continue;
 217                }
 218
 219                if($_res->isFile())
 220                {
 221                   self::removeResource($_res->getPathName());
 222                }
 223                elseif($_res->isDir())
 224                {
 225                   self::removeResource($_res->getRealPath());
 226                }
 227
 228                unset($_res);
 229             }
 230
 231             if(@rmdir($_target))
 232             {
 233                return true;
 234             }
 235          }
 236
 237          return false;
 238       }
 239    }
 240 }
 241
 242 ?>