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   1  <?php
   2  
   3  /**
   4  * @package   s9e\TextFormatter
   5  * @copyright Copyright (c) 2010-2020 The s9e authors
   6  * @license   http://www.opensource.org/licenses/mit-license.php The MIT License
   7  */
   8  namespace s9e\TextFormatter\Configurator\Items;
   9  
  10  use InvalidArgumentException;
  11  use s9e\TextFormatter\Configurator\Collections\AttributeCollection;
  12  use s9e\TextFormatter\Configurator\Collections\AttributePreprocessorCollection;
  13  use s9e\TextFormatter\Configurator\Collections\Ruleset;
  14  use s9e\TextFormatter\Configurator\Collections\TagFilterChain;
  15  use s9e\TextFormatter\Configurator\ConfigProvider;
  16  use s9e\TextFormatter\Configurator\Helpers\ConfigHelper;
  17  use s9e\TextFormatter\Configurator\Items\Template;
  18  use s9e\TextFormatter\Configurator\Traits\Configurable;
  19  
  20  /**
  21  * @property AttributeCollection $attributes This tag's attributes
  22  * @property AttributePreprocessorCollection $attributePreprocessors This tag's attribute parsers
  23  * @property TagFilterChain $filterChain This tag's filter chain
  24  * @property integer $nestingLimit Maximum nesting level for this tag
  25  * @property Ruleset $rules Rules associated with this tag
  26  * @property integer $tagLimit Maximum number of this tag per message
  27  * @property-read Template $template Template associated with this tag
  28  * @property-write string|Template $template Template associated with this tag
  29  */
  30  class Tag implements ConfigProvider
  31  {
  32      use Configurable;
  33  
  34      /**
  35      * @var AttributeCollection This tag's attributes
  36      */
  37      protected $attributes;
  38  
  39      /**
  40      * @var AttributePreprocessorCollection This tag's attribute parsers
  41      */
  42      protected $attributePreprocessors;
  43  
  44      /**
  45      * @var TagFilterChain This tag's filter chain
  46      */
  47      protected $filterChain;
  48  
  49      /**
  50      * @var integer Maximum nesting level for this tag
  51      */
  52      protected $nestingLimit = 10;
  53  
  54      /**
  55      * @var Ruleset Rules associated with this tag
  56      */
  57      protected $rules;
  58  
  59      /**
  60      * @var integer Maximum number of this tag per message
  61      */
  62      protected $tagLimit = 5000;
  63  
  64      /**
  65      * @var Template Template associated with this tag
  66      */
  67      protected $template;
  68  
  69      /**
  70      * Constructor
  71      *
  72      * @param  array $options This tag's options
  73      */
  74  	public function __construct(array $options = null)
  75      {
  76          $this->attributes             = new AttributeCollection;
  77          $this->attributePreprocessors = new AttributePreprocessorCollection;
  78          $this->filterChain            = new TagFilterChain;
  79          $this->rules                  = new Ruleset;
  80  
  81          // Start the filterChain with the default processing
  82          $this->filterChain->append('s9e\\TextFormatter\\Parser\\FilterProcessing::executeAttributePreprocessors')
  83                            ->addParameterByName('tagConfig')
  84                            ->setJS('executeAttributePreprocessors');
  85  
  86          $this->filterChain->append('s9e\\TextFormatter\\Parser\\FilterProcessing::filterAttributes')
  87                            ->addParameterByName('tagConfig')
  88                            ->addParameterByName('registeredVars')
  89                            ->addParameterByName('logger')
  90                            ->setJS('filterAttributes');
  91  
  92          if (isset($options))
  93          {
  94              // Sort the options by name so that attributes are set before the template, which is
  95              // necessary to evaluate whether the template is safe
  96              ksort($options);
  97  
  98              foreach ($options as $optionName => $optionValue)
  99              {
 100                  $this->__set($optionName, $optionValue);
 101              }
 102          }
 103      }
 104  
 105      /**
 106      * {@inheritdoc}
 107      */
 108  	public function asConfig()
 109      {
 110          $vars = get_object_vars($this);
 111  
 112          // Remove properties that are not needed during parsing
 113          unset($vars['template']);
 114  
 115          // If there are no attribute preprocessors defined, we can remove the step from this tag's
 116          // filterChain
 117          if (!count($this->attributePreprocessors))
 118          {
 119              $callback = 's9e\\TextFormatter\\Parser\\FilterProcessing::executeAttributePreprocessors';
 120  
 121              // We operate on a copy of the filterChain, without modifying the original
 122              $filterChain = clone $vars['filterChain'];
 123  
 124              // Process the chain in reverse order so that we don't skip indices
 125              $i = count($filterChain);
 126              while (--$i >= 0)
 127              {
 128                  if ($filterChain[$i]->getCallback() === $callback)
 129                  {
 130                      unset($filterChain[$i]);
 131                  }
 132              }
 133  
 134              $vars['filterChain'] = $filterChain;
 135          }
 136  
 137          return ConfigHelper::toArray($vars) + ['attributes' => [], 'filterChain' => []];
 138      }
 139  
 140      /**
 141      * Return this tag's template
 142      *
 143      * @return Template
 144      */
 145  	public function getTemplate()
 146      {
 147          return $this->template;
 148      }
 149  
 150      /**
 151      * Test whether this tag has a template
 152      *
 153      * @return bool
 154      */
 155  	public function issetTemplate()
 156      {
 157          return isset($this->template);
 158      }
 159  
 160      /**
 161      * Set this tag's attribute preprocessors
 162      *
 163      * @param  array|AttributePreprocessorCollection $attributePreprocessors 2D array of [attrName=>[regexp]], or an instance of AttributePreprocessorCollection
 164      * @return void
 165      */
 166  	public function setAttributePreprocessors($attributePreprocessors)
 167      {
 168          $this->attributePreprocessors->clear();
 169          $this->attributePreprocessors->merge($attributePreprocessors);
 170      }
 171  
 172      /**
 173      * Set this tag's nestingLimit
 174      *
 175      * @param  integer $limit
 176      * @return void
 177      */
 178  	public function setNestingLimit($limit)
 179      {
 180          $limit = (int) $limit;
 181  
 182          if ($limit < 1)
 183          {
 184              throw new InvalidArgumentException('nestingLimit must be a number greater than 0');
 185          }
 186  
 187          $this->nestingLimit = $limit;
 188      }
 189  
 190      /**
 191      * Set this tag's rules
 192      *
 193      * @param  array|Ruleset $rules 2D array of rule definitions, or instance of Ruleset
 194      * @return void
 195      */
 196  	public function setRules($rules)
 197      {
 198          $this->rules->clear();
 199          $this->rules->merge($rules);
 200      }
 201  
 202      /**
 203      * Set this tag's tagLimit
 204      *
 205      * @param  integer $limit
 206      * @return void
 207      */
 208  	public function setTagLimit($limit)
 209      {
 210          $limit = (int) $limit;
 211  
 212          if ($limit < 1)
 213          {
 214              throw new InvalidArgumentException('tagLimit must be a number greater than 0');
 215          }
 216  
 217          $this->tagLimit = $limit;
 218      }
 219  
 220      /**
 221      * Set the template associated with this tag
 222      *
 223      * @param  string|Template $template
 224      * @return void
 225      */
 226  	public function setTemplate($template)
 227      {
 228          if (!($template instanceof Template))
 229          {
 230              $template = new Template($template);
 231          }
 232  
 233          $this->template = $template;
 234      }
 235  
 236      /**
 237      * Unset this tag's template
 238      *
 239      * @return void
 240      */
 241  	public function unsetTemplate()
 242      {
 243          unset($this->template);
 244      }
 245  }