1 files changed, 120 insertions, 0 deletions
diff --git a/srcs/phpmyadmin/libraries/classes/Plugins/Schema/Eps/RelationStatsEps.php b/srcs/phpmyadmin/libraries/classes/Plugins/Schema/Eps/RelationStatsEps.php
new file mode 100644
index 0000000..4c50131
--- /dev/null
+++ b/srcs/phpmyadmin/libraries/classes/Plugins/Schema/Eps/RelationStatsEps.php
@@ -0,0 +1,120 @@
+<?php
+/* vim: set expandtab sw=4 ts=4 sts=4: */
+/**
+ * Contains PhpMyAdmin\Plugins\Schema\Eps\RelationStatsEps class
+ *
+ * @package PhpMyAdmin
+ */
+declare(strict_types=1);
+
+namespace PhpMyAdmin\Plugins\Schema\Eps;
+
+use PhpMyAdmin\Plugins\Schema\RelationStats;
+
+/**
+ * Relation preferences/statistics
+ *
+ * This class fetches the table master and foreign fields positions
+ * and helps in generating the Table references and then connects
+ * master table's master field to foreign table's foreign key
+ * in EPS document.
+ *
+ * @package PhpMyAdmin
+ * @name    Relation_Stats_Eps
+ * @see     PMA_EPS
+ */
+class RelationStatsEps extends RelationStats
+{
+    /**
+     * The "PhpMyAdmin\Plugins\Schema\Eps\RelationStatsEps" constructor
+     *
+     * @param Eps    $diagram       The EPS diagram
+     * @param string $master_table  The master table name
+     * @param string $master_field  The relation field in the master table
+     * @param string $foreign_table The foreign table name
+     * @param string $foreign_field The relation field in the foreign table
+     */
+    public function __construct(
+        $diagram,
+        $master_table,
+        $master_field,
+        $foreign_table,
+        $foreign_field
+    ) {
+        $this->wTick = 10;
+        parent::__construct(
+            $diagram,
+            $master_table,
+            $master_field,
+            $foreign_table,
+            $foreign_field
+        );
+        $this->ySrc  += 10;
+        $this->yDest += 10;
+    }
+
+    /**
+     * draws relation links and arrows
+     * shows foreign key relations
+     *
+     * @see PMA_EPS
+     *
+     * @return void
+     */
+    public function relationDraw()
+    {
+        // draw a line like -- to foreign field
+        $this->diagram->line(
+            $this->xSrc,
+            $this->ySrc,
+            $this->xSrc + $this->srcDir * $this->wTick,
+            $this->ySrc,
+            1
+        );
+        // draw a line like -- to master field
+        $this->diagram->line(
+            $this->xDest + $this->destDir * $this->wTick,
+            $this->yDest,
+            $this->xDest,
+            $this->yDest,
+            1
+        );
+        // draw a line that connects to master field line and foreign field line
+        $this->diagram->line(
+            $this->xSrc + $this->srcDir * $this->wTick,
+            $this->ySrc,
+            $this->xDest + $this->destDir * $this->wTick,
+            $this->yDest,
+            1
+        );
+        $root2 = 2 * sqrt(2);
+        $this->diagram->line(
+            $this->xSrc + $this->srcDir * $this->wTick * 0.75,
+            $this->ySrc,
+            $this->xSrc + $this->srcDir * (0.75 - 1 / $root2) * $this->wTick,
+            $this->ySrc + $this->wTick / $root2,
+            1
+        );
+        $this->diagram->line(
+            $this->xSrc + $this->srcDir * $this->wTick * 0.75,
+            $this->ySrc,
+            $this->xSrc + $this->srcDir * (0.75 - 1 / $root2) * $this->wTick,
+            $this->ySrc - $this->wTick / $root2,
+            1
+        );
+        $this->diagram->line(
+            $this->xDest + $this->destDir * $this->wTick / 2,
+            $this->yDest,
+            $this->xDest + $this->destDir * (0.5 + 1 / $root2) * $this->wTick,
+            $this->yDest + $this->wTick / $root2,
+            1
+        );
+        $this->diagram->line(
+            $this->xDest + $this->destDir * $this->wTick / 2,
+            $this->yDest,
+            $this->xDest + $this->destDir * (0.5 + 1 / $root2) * $this->wTick,
+            $this->yDest - $this->wTick / $root2,
+            1
+        );
+    }
+}