Moving the relations to a dedicated Namespace

src/ORM/Relations/BelongsToMany.php

@@ -0,0 +1,75 @@
+<?php
+
+namespace ORM\Relations;
+
+use ORM\DBInstance;
+use ORM\Collection;
+
+/**
+ * Belongs to Many
+ *
+ * Defines that this object is related to many other instances
+ * of other classes throw a pivot table.
+ *
+ * Table Post    = (id, name, content)
+ * Table Tag     = (id, name)
+ * Table Post_Tag = (id, postid, tagid)
+ *
+ * This relation will be created in both classes
+ */
+class BelongsToMany {
+
+    private $localObject;
+    private $foreignObject;
+    private $pivotTable;
+    private $localInPivot;
+    private $remoteInPivot;
+    private $remoteFilter;
+    private $remoteLimit;
+
+    /**
+     * Build the Connection
+     *
+     * @param mixed $localObject
+     * @param mixed $foreignObject
+     * @param mixed $pivotTable
+     * @param mixed $localInPivot
+     * @param mixed $remoteInPivot
+     * @param mixed $remoteFilter
+     * @param mixed $remoteLimit
+     */
+    function __construct($localObject, $foreignObject, $pivotTable, $localInPivot, $remoteInPivot, $remoteFilter = Array(), $remoteLimit = Array()) {
+        $this->localObject = $localObject;
+        $this->foreignObject = $foreignObject;
+        $this->pivotTable = $pivotTable;
+        $this->localInPivot = $localInPivot;
+        $this->remoteInPivot = $remoteInPivot;
+        $this->remoteFilter = $remoteFilter;
+        $this->remoteLimit = $remoteLimit;
+    }
+
+    function get() : Collection {
+
+        $limitsSql = '';
+        foreach ($this->remoteLimit as $key => $value) {
+            $limitsSql .= "$key $value ";
+        }
+
+        $pivotTable = '{' . $this->pivotTable . '}';
+        $sql = "SELECT $this->remoteInPivot FROM $pivotTable WHERE $this->localInPivot = ? $limitsSql";
+
+        $relations = DBInstance::query($sql, Array($this->localObject->id), $this->localObject::_connectionName);
+
+        $ids = Array();
+        foreach ($relations as $relation) {
+            $ids[] = $relation->{$this->remoteInPivot};
+        }
+
+        if (empty($ids)) {
+            return new Collection();
+        }
+
+        return $this->foreignObject::findMany(array_merge(Array('id' => Array('IN', $ids)), $this->remoteFilter), Array('*'), $this->remoteLimit);
+    }
+
+}