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1 <?php
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2
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3 /*
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4 * This file is part of the Symfony package.
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5 *
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6 * (c) Fabien Potencier <fabien@symfony.com>
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7 *
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8 * For the full copyright and license information, please view the LICENSE
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9 * file that was distributed with this source code.
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10 */
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11
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12 namespace Symfony\Component\HttpKernel\Fragment;
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13
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14 use Symfony\Component\HttpFoundation\Request;
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15 use Symfony\Component\HttpFoundation\Response;
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16 use Symfony\Component\HttpKernel\Controller\ControllerReference;
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17 use Symfony\Component\HttpKernel\UriSigner;
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18 use Symfony\Component\Templating\EngineInterface;
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19 use Twig\Environment;
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20 use Twig\Error\LoaderError;
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21 use Twig\Loader\ExistsLoaderInterface;
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22
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23 /**
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24 * Implements the Hinclude rendering strategy.
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25 *
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26 * @author Fabien Potencier <fabien@symfony.com>
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27 */
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28 class HIncludeFragmentRenderer extends RoutableFragmentRenderer
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29 {
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30 private $globalDefaultTemplate;
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31 private $signer;
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32 private $templating;
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33 private $charset;
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34
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35 /**
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36 * @param EngineInterface|Environment $templating An EngineInterface or a Twig instance
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37 * @param UriSigner $signer A UriSigner instance
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38 * @param string $globalDefaultTemplate The global default content (it can be a template name or the content)
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39 * @param string $charset
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40 */
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41 public function __construct($templating = null, UriSigner $signer = null, $globalDefaultTemplate = null, $charset = 'utf-8')
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42 {
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43 $this->setTemplating($templating);
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44 $this->globalDefaultTemplate = $globalDefaultTemplate;
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45 $this->signer = $signer;
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46 $this->charset = $charset;
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47 }
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48
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49 /**
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50 * Sets the templating engine to use to render the default content.
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51 *
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52 * @param EngineInterface|Environment|null $templating An EngineInterface or an Environment instance
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53 *
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54 * @throws \InvalidArgumentException
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55 */
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56 public function setTemplating($templating)
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57 {
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58 if (null !== $templating && !$templating instanceof EngineInterface && !$templating instanceof Environment) {
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59 throw new \InvalidArgumentException('The hinclude rendering strategy needs an instance of Twig\Environment or Symfony\Component\Templating\EngineInterface');
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60 }
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61
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62 $this->templating = $templating;
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63 }
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64
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65 /**
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66 * Checks if a templating engine has been set.
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67 *
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68 * @return bool true if the templating engine has been set, false otherwise
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69 */
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70 public function hasTemplating()
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71 {
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72 return null !== $this->templating;
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73 }
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74
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75 /**
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76 * {@inheritdoc}
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77 *
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78 * Additional available options:
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79 *
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80 * * default: The default content (it can be a template name or the content)
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81 * * id: An optional hx:include tag id attribute
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82 * * attributes: An optional array of hx:include tag attributes
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83 */
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84 public function render($uri, Request $request, array $options = [])
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85 {
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86 if ($uri instanceof ControllerReference) {
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87 if (null === $this->signer) {
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88 throw new \LogicException('You must use a proper URI when using the Hinclude rendering strategy or set a URL signer.');
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89 }
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90
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91 // we need to sign the absolute URI, but want to return the path only.
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92 $uri = substr($this->signer->sign($this->generateFragmentUri($uri, $request, true)), \strlen($request->getSchemeAndHttpHost()));
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93 }
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94
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95 // We need to replace ampersands in the URI with the encoded form in order to return valid html/xml content.
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96 $uri = str_replace('&', '&', $uri);
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97
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98 $template = isset($options['default']) ? $options['default'] : $this->globalDefaultTemplate;
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99 if (null !== $this->templating && $template && $this->templateExists($template)) {
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100 $content = $this->templating->render($template);
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101 } else {
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102 $content = $template;
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103 }
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104
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105 $attributes = isset($options['attributes']) && \is_array($options['attributes']) ? $options['attributes'] : [];
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106 if (isset($options['id']) && $options['id']) {
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107 $attributes['id'] = $options['id'];
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108 }
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109 $renderedAttributes = '';
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110 if (\count($attributes) > 0) {
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111 $flags = ENT_QUOTES | ENT_SUBSTITUTE;
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112 foreach ($attributes as $attribute => $value) {
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113 $renderedAttributes .= sprintf(
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114 ' %s="%s"',
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115 htmlspecialchars($attribute, $flags, $this->charset, false),
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116 htmlspecialchars($value, $flags, $this->charset, false)
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117 );
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118 }
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119 }
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120
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121 return new Response(sprintf('<hx:include src="%s"%s>%s</hx:include>', $uri, $renderedAttributes, $content));
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122 }
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123
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124 /**
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125 * @param string $template
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126 *
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127 * @return bool
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128 */
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129 private function templateExists($template)
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130 {
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131 if ($this->templating instanceof EngineInterface) {
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132 try {
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133 return $this->templating->exists($template);
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134 } catch (\Exception $e) {
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135 return false;
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136 }
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137 }
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138
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139 $loader = $this->templating->getLoader();
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140 if ($loader instanceof ExistsLoaderInterface || method_exists($loader, 'exists')) {
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141 return $loader->exists($template);
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142 }
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143
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144 try {
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145 if (method_exists($loader, 'getSourceContext')) {
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146 $loader->getSourceContext($template);
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147 } else {
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148 $loader->getSource($template);
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149 }
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150
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151 return true;
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152 } catch (LoaderError $e) {
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153 }
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154
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155 return false;
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156 }
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157
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158 /**
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159 * {@inheritdoc}
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160 */
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161 public function getName()
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162 {
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163 return 'hinclude';
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164 }
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165 }
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