Mercurial > SimpleWebPresenter

annotate InputParser.inc @ 68:4dfa3f6a2dc1

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Modify CacheTimeCheck to have a common parent, and two different implementations for script caches and file caches. Support for linkedcaches.
author Tom Fredrik "BFG" Klaussen <bfg@blenning.no>
date Thu, 11 Oct 2012 23:16:53 +0200
parents 74f7b64bdb78
children dd4ddedca4c5
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1 <?php
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2 /**
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3 * Functionality for translating an XML configuration document into a webpage
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4 */
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5 class InputParser {
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6 private $options;
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7 private $master;
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8
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9 /**
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10 * Constructs a new InputParser object
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11 *
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12 * @param $name name of file to read configuration from
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13 * @param $masterCache CacheTimeCheck cache object to use as parent for this inputParsercache
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14 *
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15 * @todo masterCache is currently used as is, fix so linked caches
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16 * may be used.
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17 */
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18 function __construct($name, $masterCache) {
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19 $this->master = new DOMDocument();
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20 $cache = new CacheTimeCheck($name);
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21 $cache->addParent($masterCache);
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22 $this->master->load($name);
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24 $this->options = new Options($this->master);
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25 $this->options->setCache($cache);
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26 $this->options->setBasePath(basePath());
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27 $this->options->setCacheable(true);
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28
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29 $this->options->setUrlParams(array('name', 'lang'));
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30
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31 if(array_key_exists('lang', $_GET) && $_GET['lang']) {
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32 $this->options->setLang($_GET['lang']);
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33 }
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34 else {
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35 $this->options->setLang($this->options->getDefaultLang());
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36 }
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37
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38 if(array_key_exists('name', $_GET) && $_GET['name']) {
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39 $this->options->setName($_GET['name']);
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40 }
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41
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42 $params = $this->master->getElementsByTagName("param");
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43
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44 foreach ($params as $param) {
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45 if ($param->getAttribute("type") == "input") {
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46 $doc = self::getInput($this->master, $param, $this->options);
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47
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48 $parent = $param->parentNode;
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49 foreach ($doc->firstChild->childNodes as $child) {
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50 $clonedChild = $this->master->importNode($child, true);
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51 $parent->insertBefore($clonedChild, $param);
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52 }
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53 $parent->removeChild($param);
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54 }
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55 }
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56 $this->master = self::getFiles($this->master, $this->options);
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57
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58 }
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60 /**
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61 * Generate an appropriate response for this page, eg. 302 NOT
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62 * MODIFIED or the actual page
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63 */
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64 function genPage()
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65 {
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66 //print_r($this->options->getCache()->cacheSet(1));
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67 //exit;
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68 if (CACHING && $this->options->getCacheable())
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69 $this->options->getCache()->CheckHttpModified();
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70 print $this->master->saveXml($this->master);
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71 }
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72
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73 /**
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74 * Extracts data from a @<param@> tag.
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75 *
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76 * @param $param the param tag
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77 *
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78 * @return if the type is array, return an array, otherwise return a
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79 * scalar
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80 */
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81 function getParam($param)
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82 {
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83 $param_type = $param->getAttribute("type");
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84 $param_value;
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85 if (! $param_type)
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86 $param_type = "scalar";
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87
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88 if($param_type == "scalar") {
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89 $param_subst = $param->getAttribute("subst");
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90 $param_value = $param->getAttribute("value");
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91 if ($param_subst) {
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92 /*
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93 $param_value=preg_replace("/name/", $name, $param_subst);
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94 $param_value=preg_replace('/lang/', $lang, $param_value);
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95 */
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96 }
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97 }
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98 elseif($param_type == "array") {
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99 $params = $param->getElementsByTagName("param");
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100 $param_value = array();
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101 foreach ($param->childNodes as $param) {
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102 if ($param->nodeType == XML_ELEMENT_NODE) {
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103 array_push($param_value, self::getParam($param));
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104 }
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105 }
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106 }
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107 return $param_value;
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108 }
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109
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110 /**
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111 * This is the last processing stage for generating a file.
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112 *
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113 * @param $doc the document to be worked upon
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114 * @param $options an Options object for this file.
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115 *
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116 * @return This is the same as the input document, fully processed
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117 */
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118 static function getFiles($doc, $options) {
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119 $lang = $options->getLang();
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120 $conf = $options->getName();
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121
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122 $toRemove = array();
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123
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124 $topLevelTags = $doc->getElementsByTagName("toplevel");
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125 foreach ($topLevelTags as $topLevel) {
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126 $topLevel->parentNode->removeChild($topLevel);
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127 }
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128
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129 $valueDict = array();
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130 $fragments = array();
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131 $setters = $doc->getElementsByTagName("set");
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132 foreach ($setters as $setTag) {
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133 $key = $setTag->getAttribute("id");
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134 $type = $setTag->getAttribute("type");
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135 if ($type == "fragment") {
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136 $fragments[$key] = $setTag;
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137 }
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138 else {
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139 $value = $setTag->getAttribute("value");
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140 if ($key && $value) {
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141 $valueDict[$key] = $value;
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142 }
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143 }
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144 //We need to iterate in the opposite direction when removing,
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145 //so best shifting.
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146 array_unshift($toRemove, $setTag);
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147 }
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148
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149 $params = $doc->getElementsByTagName("param");
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150 foreach ($params as $param) {
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151 if ($param->getAttribute("type")=="input_config") {
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152 $id = $param->getAttribute("id");
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153 if (array_key_exists($id, $valueDict)) {
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154 $value = $valueDict[$id];
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155 $tmp = new DOMDocument();
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156
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157 $tmp->loadXml("<xml>${value}</xml>");
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158 $parent = $param->parentNode;
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159 $parent->insertBefore(new DOMText($tmp->textContent), $param);
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160 //We need to iterate in the opposite direction when removing,
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161 //so best shifting.
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162 array_unshift($toRemove, $param);
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163 }
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164 elseif (array_key_exists($id, $fragments)) {
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165 $fragment = $fragments[$id];
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166
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167 $cloneFragment = $fragment->cloneNode(true);
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168 $insNode = $param;
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169 for ($i = $cloneFragment->childNodes->length - 1; $i >= 0; $i--) {
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170 $child = $cloneFragment->childNodes->item($i);
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171 $child = $child->parentNode->removeChild($child);
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172 $insNode = $insNode->parentNode->insertBefore($child, $insNode);
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173 }
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174
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175 //We need to iterate in the opposite direction when removing,
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176 //so best shifting.
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177 array_unshift($toRemove, $param);
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178 }
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179 }
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180 }
62
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181
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182 foreach($toRemove as $param) {
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183 $parent = $param->parentNode;
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184 $parent->removeChild($param);
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185 }
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186
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187 $body = getElementByTagName($doc,"body");
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188 $files = $body->getElementsByTagName("file");
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189
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190 $toRemove = array();
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191
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192 foreach ($files as $file) {
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193 $script = $file->getAttribute("script");
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194 if ($script) {
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195 $options->setCacheable(false);
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196 $src="";
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197 $cwd = getcwd();
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198
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199 $matches=array();
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200 preg_match('/(.*\/)/', $script, $matches);
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201 $dirname=$matches[0];
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202 preg_match('/([^\/]*)$/', $script, $matches);
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203 $filename=$matches[0];
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204 chdir("${lang}/${dirname}");
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205 $pipe=popen("php ${filename}","r");
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206 $file_content = stream_get_contents($pipe);
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207 chdir("${cwd}");
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208 }
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209 else {
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210 $src = $file->getAttribute("src");
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211 $fname = $options->getBasePath() . "/${lang}/${src}";
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212 $file_content = $options->getCache()->loadFile($fname);
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213 }
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214 if(floatval($file_content)<0) {
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215 errorPage("Resource not found '${lang}/${src}'");
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216 }
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217
62
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218 $filters = $file->getElementsByTagName("filter");
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219 foreach($filters as $filter) {
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220 $func = $filter->getAttribute("function");
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221 $params = $filter->getElementsByTagName("param");
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222 $callString = "\$file_content = ${func}(\$file_content, \$options";
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223 $param_values = array();
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224 $i = 0;
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225 foreach ($filter->childNodes as $param) {
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226 if ($param->nodeType == XML_ELEMENT_NODE)
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227 {
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228 $param_value[$i] = self::getParam($param);
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229 $callString .= ",\$param_value[$i]";
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230 $i++;
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231 }
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232 }
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233 $callString .= ");";
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234 eval($callString);
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235 }
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236 $ndoc = new DOMDocument();
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237
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238 $ndoc->loadXml("<xml>${file_content}</xml>");
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239
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240 $parent = $file->parentNode;
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241 foreach ($ndoc->firstChild->childNodes as $child) {
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242 $clonedChild = $doc->importNode($child, true);
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243 $parent->insertBefore($clonedChild, $file);
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244 }
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245 //We need to iterate in the opposite direction when removing,
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246 //so best shifting.
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diff changeset
247 array_unshift($toRemove, $file);
59
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248 }
62
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249 foreach($toRemove as $param) {
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250 $parent = $param->parentNode;
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251 $parent->removeChild($param);
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252 }
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253
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254 return $doc;
59
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255 }
23
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256
66
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257 /**
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258 * Follows all include directives recursively for the specified
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259 * $param an generates an xml file.
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260 *
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261 * This function may be used to generate a file which has all the
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262 * necessary information to determine wether or not we may cache.
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263 *
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264 * @param $master The master document to be processed
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265 * @param $param the input tag to resolve
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266 * @param $options the options object for this file
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267 */
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268 function getInput($master, $param, $options)
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269 {
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270 $lang = $options->getLang();
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271 $name = $param->getAttribute("id");
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272 $conf = $options->getName();
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273 if (!$conf)
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274 $conf = $param->getAttribute("default");
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275
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276 $confFile = $options->getBasePath() . "/${lang}/${conf}.xml";
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277 $options->getCache()->cache_time($confFile);
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278 $doc = new DOMDocument();
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279 $doc->load($confFile);
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280
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281 $toplevel = $doc->getElementsByTagName("toplevel");
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282
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283 if(! $toplevel->length) {
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284 errorPage("Resource '${conf}' is not available", 500);
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285 }
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286
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287 $includes = $doc->getElementsByTagName("include");
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288 $recurse = 0;
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289
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290 while($includes->length > 0) {
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291 if(++$recurse > MAX_RECURSE) {
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292 errorPage('Recursion limit exceeded', 500);
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293 }
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294 foreach ($includes as $include) {
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295 $src = $include->getAttribute("src");
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296 $subdoc = new DOMDocument();
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297 $subfile = $options->getBasePath() . "/${lang}/${src}";
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298 $subdoc->load("$subfile");
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299 $options->getCache()->cache_time($subfile);
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300 $parent = $include->parentNode;
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301 $xml = getElementByTagName($subdoc,"xml");
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302 foreach($xml->childNodes as $child) {
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303 $text = $subdoc->saveXml($child);
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304 $clonedChild = $doc->importNode($child,true);
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305 $parent->insertBefore($clonedChild,$include);
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306 }
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307 $parent->removeChild($include);
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308 }
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309 $includes = $doc->getElementsByTagName("include");
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310 }
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311
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312 return $doc;
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313 }
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314 }
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315 ?>