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<?php | |
/** | |
* | |
* This file is part of the phpBB Forum Software package. | |
* | |
* @copyright (c) phpBB Limited <https://www.phpbb.com> | |
* @license GNU General Public License, version 2 (GPL-2.0) | |
* | |
* For full copyright and license information, please see | |
* the docs/CREDITS.txt file. | |
* | |
*/ | |
namespace phpbb\textformatter\s9e; | |
use phpbb\textformatter\s9e\factory; | |
use s9e\TextFormatter\Configurator\Helpers\TemplateLoader; | |
use s9e\TextFormatter\Configurator\Items\UnsafeTemplate; | |
class bbcode_merger | |
{ | |
/** | |
* @var \s9e\TextFormatter\Configurator $configurator Configurator instance used to inspect BBCodes | |
*/ | |
protected $configurator; | |
/** | |
* @param factory $factory | |
*/ | |
public function __construct(factory $factory) | |
{ | |
$this->configurator = $factory->get_configurator(); | |
} | |
/** | |
* Merge two BBCode definitions | |
* | |
* All of the arrays contain a "usage" element and a "template" element | |
* | |
* @throws InvalidArgumentException if a definition cannot be interpreted | |
* @throws RuntimeException if something unexpected occurs | |
* | |
* @param array $without BBCode definition without an attribute | |
* @param array $with BBCode definition with an attribute | |
* @return array Merged definition | |
*/ | |
public function merge_bbcodes(array $without, array $with) | |
{ | |
$without = $this->create_bbcode($without); | |
$with = $this->create_bbcode($with); | |
// Select the appropriate strategy for merging this BBCode | |
if (!$this->is_optional_bbcode($without, $with) && $this->is_content_bbcode($without, $with)) | |
{ | |
$merged = $this->merge_content_bbcode($without, $with); | |
} | |
else | |
{ | |
$merged = $this->merge_optional_bbcode($without, $with); | |
} | |
$merged['template'] = $this->normalize_template($merged['template']); | |
return $merged; | |
} | |
/** | |
* Create a custom BBCode for inspection | |
* | |
* @param array $definition Original BBCode definition | |
* @return array Updated definition containing a BBCode object and a Tag | |
*/ | |
protected function create_bbcode(array $definition) | |
{ | |
$bbcode = $this->configurator->BBCodes->addCustom( | |
$definition['usage'], | |
new UnsafeTemplate($definition['template']) | |
); | |
$definition['bbcode'] = $bbcode; | |
$definition['tag'] = $this->configurator->tags[$bbcode->tagName]; | |
return $definition; | |
} | |
/** | |
* Indent given template for readability | |
* | |
* @param string $template | |
* @return string | |
*/ | |
protected function indent_template($template) | |
{ | |
$dom = TemplateLoader::load($template); | |
$dom->formatOutput = true; | |
$template = TemplateLoader::save($dom); | |
// Remove the first level of indentation if the template starts with whitespace | |
if (preg_match('(^\\n +)', $template, $m)) | |
{ | |
$template = str_replace($m[0], "\n", $template); | |
} | |
return trim($template); | |
} | |
/** | |
* Test whether the two definitions form a "content"-style BBCode | |
* | |
* Such BBCodes include the [url] BBCode, which uses its text content as | |
* attribute if none is provided | |
* | |
* @param array $without BBCode definition without an attribute | |
* @param array $with BBCode definition with an attribute | |
* @return bool | |
*/ | |
protected function is_content_bbcode(array $without, array $with) | |
{ | |
// Test whether we find the same non-TEXT token between "]" and "[" in the usage | |
// as between ">" and "<" in the template | |
return (preg_match('(\\]\\s*(\\{(?!TEXT)[^}]+\\})\\s*\\[)', $without['usage'], $m) | |
&& preg_match('(>[^<]*?' . preg_quote($m[1]) . '[^>]*?<)s', $without['template'])); | |
} | |
/** | |
* Test whether the two definitions form BBCode with an optional attribute | |
* | |
* @param array $without BBCode definition without an attribute | |
* @param array $with BBCode definition with an attribute | |
* @return bool | |
*/ | |
protected function is_optional_bbcode(array $without, array $with) | |
{ | |
// Remove the default attribute from the definition | |
$with['usage'] = preg_replace('(=[^\\]]++)', '', $with['usage']); | |
// Test whether both definitions are the same, regardless of case | |
return strcasecmp($without['usage'], $with['usage']) === 0; | |
} | |
/** | |
* Merge the two BBCode definitions of a "content"-style BBCode | |
* | |
* @param array $without BBCode definition without an attribute | |
* @param array $with BBCode definition with an attribute | |
* @return array Merged definition | |
*/ | |
protected function merge_content_bbcode(array $without, array $with) | |
{ | |
// Convert [x={X}] into [x={X;useContent}] | |
$usage = preg_replace('(\\})', ';useContent}', $with['usage'], 1); | |
// Use the template from the definition that uses an attribute | |
$template = $with['tag']->template; | |
return ['usage' => $usage, 'template' => $template]; | |
} | |
/** | |
* Merge the two BBCode definitions of a BBCode with an optional argument | |
* | |
* Such BBCodes include the [quote] BBCode, which takes an optional argument | |
* but otherwise does not behave differently | |
* | |
* @param array $without BBCode definition without an attribute | |
* @param array $with BBCode definition with an attribute | |
* @return array Merged definition | |
*/ | |
protected function merge_optional_bbcode(array $without, array $with) | |
{ | |
// Convert [X={X}] into [X={X?}] | |
$usage = preg_replace('(\\})', '?}', $with['usage'], 1); | |
// Build a template for both versions | |
$template = '<xsl:choose><xsl:when test="@' . $with['bbcode']->defaultAttribute . '">' . $with['tag']->template . '</xsl:when><xsl:otherwise>' . $without['tag']->template . '</xsl:otherwise></xsl:choose>'; | |
return ['usage' => $usage, 'template' => $template]; | |
} | |
/** | |
* Normalize a template | |
* | |
* @param string $template | |
* @return string | |
*/ | |
protected function normalize_template($template) | |
{ | |
// Normalize the template to simplify it | |
$template = $this->configurator->templateNormalizer->normalizeTemplate($template); | |
// Convert xsl:value-of elements back to {L_} tokens where applicable | |
$template = preg_replace('(<xsl:value-of select="\\$(L_\\w+)"/>)', '{$1}', $template); | |
// Beautify the template | |
$template = $this->indent_template($template); | |
return $template; | |
} | |
} |