129 lines
3.2 KiB
PHP
129 lines
3.2 KiB
PHP
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<?php
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/**
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* Contains abstract class to hold relation preferences/statistics
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*/
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declare(strict_types=1);
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namespace PhpMyAdmin\Plugins\Schema;
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use function abs;
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use function array_search;
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use function min;
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/**
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* Relations preferences/statistics
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*
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* This class fetches the table master and foreign fields positions
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* and helps in generating the Table references and then connects
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* master table's master field to foreign table's foreign key.
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*
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* @abstract
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*/
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abstract class RelationStats
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{
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/** @var object */
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protected $diagram;
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/** @var mixed */
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public $xSrc;
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/** @var mixed */
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public $ySrc;
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/** @var int */
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public $srcDir;
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/** @var int */
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public $destDir;
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/** @var mixed */
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public $xDest;
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/** @var mixed */
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public $yDest;
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/** @var int */
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public $wTick = 0;
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/**
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* @param object $diagram The diagram
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* @param string $master_table The master table name
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* @param string $master_field The relation field in the master table
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* @param string $foreign_table The foreign table name
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* @param string $foreign_field The relation field in the foreign table
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*/
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public function __construct(
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$diagram,
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$master_table,
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$master_field,
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$foreign_table,
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$foreign_field
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) {
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$this->diagram = $diagram;
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$src_pos = $this->getXy($master_table, $master_field);
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$dest_pos = $this->getXy($foreign_table, $foreign_field);
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/*
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* [0] is x-left
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* [1] is x-right
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* [2] is y
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*/
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$src_left = $src_pos[0] - $this->wTick;
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$src_right = $src_pos[1] + $this->wTick;
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$dest_left = $dest_pos[0] - $this->wTick;
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$dest_right = $dest_pos[1] + $this->wTick;
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$d1 = abs($src_left - $dest_left);
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$d2 = abs($src_right - $dest_left);
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$d3 = abs($src_left - $dest_right);
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$d4 = abs($src_right - $dest_right);
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$d = min($d1, $d2, $d3, $d4);
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if ($d == $d1) {
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$this->xSrc = $src_pos[0];
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$this->srcDir = -1;
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$this->xDest = $dest_pos[0];
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$this->destDir = -1;
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} elseif ($d == $d2) {
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$this->xSrc = $src_pos[1];
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$this->srcDir = 1;
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$this->xDest = $dest_pos[0];
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$this->destDir = -1;
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} elseif ($d == $d3) {
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$this->xSrc = $src_pos[0];
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$this->srcDir = -1;
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$this->xDest = $dest_pos[1];
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$this->destDir = 1;
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} else {
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$this->xSrc = $src_pos[1];
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$this->srcDir = 1;
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$this->xDest = $dest_pos[1];
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$this->destDir = 1;
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}
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$this->ySrc = $src_pos[2];
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$this->yDest = $dest_pos[2];
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}
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/**
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* Gets arrows coordinates
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*
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* @param TableStats $table The table
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* @param string $column The relation column name
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*
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* @return array Arrows coordinates
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*/
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private function getXy($table, $column)
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{
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$pos = array_search($column, $table->fields);
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// x_left, x_right, y
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return [
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$table->x,
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$table->x + $table->width,
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$table->y + ($pos + 1.5) * $table->heightCell,
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];
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}
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}
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