wordpress/php-fpm/wordpress_files/plugins/search-regex/models/match-context.php

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2020-05-22 03:40:23 +02:00
<?php
namespace SearchRegex;
/**
* A group of matches within the same area of a column
*/
class Match_Context {
const MATCH_LIMIT = 100;
const CONTEXT_RANGE = 100;
const CHARS_BEFORE = 50;
const CHARS_AFTER = 60;
/** @var Int */
private $context_id;
/** @var String|null */
private $context = null;
/** @var Match[] */
private $matches = [];
/** @var Int */
private $match_count = 0;
/**
* Create a Match_Context with a given context ID
*
* @param int $context_id Context ID.
*/
public function __construct( $context_id ) {
$this->context_id = $context_id;
}
/**
* Return the number of matches within this context
*
* @return Int Match count
*/
public function get_match_count() {
return $this->match_count;
}
/**
* Convert the Match_Context to to_json
*
* @return Array JSON
*/
public function to_json() {
$matches = [];
foreach ( $this->matches as $match ) {
$matches[] = $match->to_json();
}
return [
'context_id' => $this->context_id,
'context' => $this->context,
'matches' => $matches,
'match_count' => $this->match_count,
];
}
/**
* Determine if the Match object is within this context.
*
* @param Match $match The match to check.
* @return Bool true if within the context, false otherwise
*/
public function is_within_context( Match $match ) {
if ( $this->context === null ) {
return true;
}
$last_match = $this->matches[ count( $this->matches ) - 1 ];
return $match->get_position() - $last_match->get_position() < self::CONTEXT_RANGE;
}
/**
* Add a Match to this context
*
* @param Match $match The match to do.
* @param String $value The column value.
* @return void
*/
public function add_match( Match $match, $value ) {
$this->match_count++;
if ( count( $this->matches ) === self::MATCH_LIMIT ) {
return;
}
// Add match to list
$this->matches[] = $match;
// Expand the context to include everything from the first to last match
$start_pos = max( 0, $this->matches[0]->get_position() - self::CHARS_BEFORE );
$end_pos = $match->get_position() + strlen( $match->get_matched_text() ) + self::CHARS_AFTER;
$this->context = mb_substr( $value, $start_pos, $end_pos - $start_pos, 'UTF-8' );
// Finally update the match
$match->set_context( $match->get_position() - $start_pos );
}
/**
* Find the Match that exists at the given position
*
* @param int $pos_id Position.
* @return Match|Bool Match at position
*/
public function get_match_at_position( $pos_id ) {
foreach ( $this->matches as $match ) {
if ( $match->get_position() === $pos_id ) {
return $match;
}
}
return false;
}
}