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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\textreparser;
abstract class base implements reparser_interface
{
/**
* @var bool Whether to save changes to the database
*/
protected $save_changes = true;
/**
* {@inheritdoc}
*/
abstract public function get_max_id();
/**
* Return all records in given range
*
* @param integer $min_id Lower bound
* @param integer $max_id Upper bound
* @return array Array of records
*/
abstract protected function get_records_by_range($min_id, $max_id);
/**
* {@inheritdoc}
*/
abstract protected function save_record(array $record);
/**
* Add fields to given record, if applicable
*
* The enable_* fields are not always saved to the database. Sometimes we need to guess their
* original value based on the text content or possibly other fields
*
* @param array $record Original record
* @return array Complete record
*/
protected function add_missing_fields(array $record)
{
if (!isset($record['enable_bbcode'], $record['enable_smilies'], $record['enable_magic_url']))
{
if (isset($record['options']))
{
$record += array(
'enable_bbcode' => (bool) ($record['options'] & OPTION_FLAG_BBCODE),
'enable_smilies' => (bool) ($record['options'] & OPTION_FLAG_SMILIES),
'enable_magic_url' => (bool) ($record['options'] & OPTION_FLAG_LINKS),
);
}
else
{
$record += array(
'enable_bbcode' => $this->guess_bbcodes($record),
'enable_smilies' => $this->guess_smilies($record),
'enable_magic_url' => $this->guess_magic_url($record),
);
}
}
// Those BBCodes are disabled based on context and user permissions and that value is never
// stored in the database. Here we test whether they were used in the original text.
$bbcodes = array('flash', 'img', 'quote', 'url');
foreach ($bbcodes as $bbcode)
{
$field_name = 'enable_' . $bbcode . '_bbcode';
$record[$field_name] = $this->guess_bbcode($record, $bbcode);
}
// Magic URLs are tied to the URL BBCode, that's why if magic URLs are enabled we make sure
// that the URL BBCode is also enabled
if ($record['enable_magic_url'])
{
$record['enable_url_bbcode'] = true;
}
return $record;
}
/**
* Disable saving changes to the database
*/
public function disable_save()
{
$this->save_changes = false;
}
/**
* Enable saving changes to the database
*/
public function enable_save()
{
$this->save_changes = true;
}
/**
* Guess whether given BBCode is in use in given record
*
* @param array $record
* @param string $bbcode
* @return bool
*/
protected function guess_bbcode(array $record, $bbcode)
{
if (!empty($record['bbcode_uid']))
{
// Look for the closing tag, e.g. [/url]
$match = '[/' . $bbcode . ':' . $record['bbcode_uid'];
if (strpos($record['text'], $match) !== false)
{
return true;
}
}
if (substr($record['text'], 0, 2) === '<r')
{
// Look for the closing tag inside of a e element, in an element of the same name, e.g.
// <e>[/url]</e></URL>
$match = '<e>[/' . $bbcode . ']</e></' . strtoupper($bbcode) . '>';
if (strpos($record['text'], $match) !== false)
{
return true;
}
}
return false;
}
/**
* Guess whether any BBCode is in use in given record
*
* @param array $record
* @return bool
*/
protected function guess_bbcodes(array $record)
{
if (!empty($record['bbcode_uid']))
{
// Test whether the bbcode_uid is in use
$match = ':' . $record['bbcode_uid'];
if (strpos($record['text'], $match) !== false)
{
return true;
}
}
if (substr($record['text'], 0, 2) === '<r')
{
// Look for a closing tag inside of an e element
return (bool) preg_match('(<e>\\[/\\w+\\]</e>)', $match);
}
return false;
}
/**
* Guess whether magic URLs are in use in given record
*
* @param array $record
* @return bool
*/
protected function guess_magic_url(array $record)
{
// Look for <!-- m --> or for a URL tag that's not immediately followed by <s>
return (strpos($record['text'], '<!-- m -->') !== false || preg_match('(<URL [^>]++>(?!<s>))', $record['text']));
}
/**
* Guess whether smilies are in use in given record
*
* @param array $record
* @return bool
*/
protected function guess_smilies(array $record)
{
return (strpos($record['text'], '<!-- s') !== false || strpos($record['text'], '<E>') !== false);
}
/**
* {@inheritdoc}
*/
public function reparse_range($min_id, $max_id)
{
foreach ($this->get_records_by_range($min_id, $max_id) as $record)
{
$this->reparse_record($record);
}
}
/**
* Reparse given record
*
* @param array $record Associative array containing the record's data
*/
protected function reparse_record(array $record)
{
$record = $this->add_missing_fields($record);
$flags = ($record['enable_bbcode']) ? OPTION_FLAG_BBCODE : 0;
$flags |= ($record['enable_smilies']) ? OPTION_FLAG_SMILIES : 0;
$flags |= ($record['enable_magic_url']) ? OPTION_FLAG_LINKS : 0;
$unparsed = array_merge(
$record,
generate_text_for_edit($record['text'], $record['bbcode_uid'], $flags)
);
// generate_text_for_edit() and decode_message() actually return the text as HTML. It has to
// be decoded to plain text before it can be reparsed
$text = html_entity_decode($unparsed['text'], ENT_QUOTES, 'UTF-8');
$bitfield = $flags = null;
generate_text_for_storage(
$text,
$unparsed['bbcode_uid'],
$bitfield,
$flags,
$unparsed['enable_bbcode'],
$unparsed['enable_magic_url'],
$unparsed['enable_smilies'],
$unparsed['enable_img_bbcode'],
$unparsed['enable_flash_bbcode'],
$unparsed['enable_quote_bbcode'],
$unparsed['enable_url_bbcode']
);
// Save the new text if it has changed and it's not a dry run
if ($text !== $record['text'] && $this->save_changes)
{
$record['text'] = $text;
$this->save_record($record);
}
}
}
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