1 | <?php
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2 | /**
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3 | * Smarty plugin
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4 | * @package Smarty
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5 | * @subpackage plugins
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6 | */
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7 |
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8 | /**
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9 | * read a cache file, determine if it needs to be
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10 | * regenerated or not
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11 | *
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12 | * @param string $tpl_file
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13 | * @param string $cache_id
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14 | * @param string $compile_id
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15 | * @param string $results
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16 | * @return boolean
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17 | */
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18 |
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19 | // $tpl_file, $cache_id, $compile_id, &$results
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20 |
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21 | function smarty_core_read_cache_file(&$params, &$smarty)
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22 | {
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23 | static $content_cache = array();
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24 |
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25 | if ($smarty->force_compile) {
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26 | // force compile enabled, always regenerate
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27 | return false;
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28 | }
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29 |
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30 | if (isset($content_cache[$params['tpl_file'].','.$params['cache_id'].','.$params['compile_id']])) {
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31 | list($params['results'], $smarty->_cache_info) = $content_cache[$params['tpl_file'].','.$params['cache_id'].','.$params['compile_id']];
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32 | return true;
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33 | }
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34 |
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35 | if (!empty($smarty->cache_handler_func)) {
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36 | // use cache_handler function
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37 | call_user_func_array($smarty->cache_handler_func,
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38 | array('read', &$smarty, &$params['results'], $params['tpl_file'], $params['cache_id'], $params['compile_id'], null));
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39 | } else {
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40 | // use local cache file
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41 | $_auto_id = $smarty->_get_auto_id($params['cache_id'], $params['compile_id']);
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42 | $_cache_file = $smarty->_get_auto_filename($smarty->cache_dir, $params['tpl_file'], $_auto_id);
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43 | $params['results'] = $smarty->_read_file($_cache_file);
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44 | }
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45 |
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46 | if (empty($params['results'])) {
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47 | // nothing to parse (error?), regenerate cache
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48 | return false;
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49 | }
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50 |
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51 | $_contents = $params['results'];
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52 | $_info_start = strpos($_contents, "\n") + 1;
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53 | $_info_len = (int)substr($_contents, 0, $_info_start - 1);
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54 | $_cache_info = unserialize(substr($_contents, $_info_start, $_info_len));
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55 | $params['results'] = substr($_contents, $_info_start + $_info_len);
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56 |
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57 | if ($smarty->caching == 2 && isset ($_cache_info['expires'])){
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58 | // caching by expiration time
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59 | if ($_cache_info['expires'] > -1 && (time() > $_cache_info['expires'])) {
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60 | // cache expired, regenerate
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61 | return false;
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62 | }
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63 | } else {
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64 | // caching by lifetime
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65 | if ($smarty->cache_lifetime > -1 && (time() - $_cache_info['timestamp'] > $smarty->cache_lifetime)) {
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66 | // cache expired, regenerate
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67 | return false;
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68 | }
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69 | }
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70 |
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71 | if ($smarty->compile_check) {
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72 | $_params = array('get_source' => false, 'quiet'=>true);
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73 | foreach (array_keys($_cache_info['template']) as $_template_dep) {
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74 | $_params['resource_name'] = $_template_dep;
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75 | if (!$smarty->_fetch_resource_info($_params) || $_cache_info['timestamp'] < $_params['resource_timestamp']) {
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76 | // template file has changed, regenerate cache
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77 | return false;
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78 | }
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79 | }
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80 |
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81 | if (isset($_cache_info['config'])) {
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82 | $_params = array('resource_base_path' => $smarty->config_dir, 'get_source' => false, 'quiet'=>true);
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83 | foreach (array_keys($_cache_info['config']) as $_config_dep) {
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84 | $_params['resource_name'] = $_config_dep;
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85 | if (!$smarty->_fetch_resource_info($_params) || $_cache_info['timestamp'] < $_params['resource_timestamp']) {
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86 | // config file has changed, regenerate cache
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87 | return false;
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88 | }
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89 | }
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90 | }
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91 | }
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92 |
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93 | $content_cache[$params['tpl_file'].','.$params['cache_id'].','.$params['compile_id']] = array($params['results'], $_cache_info);
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94 |
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95 | $smarty->_cache_info = $_cache_info;
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96 | return true;
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97 | }
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98 |
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99 | /* vim: set expandtab: */
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100 |
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101 | ?>
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