Database abstraction

core/Driver/SQL/Query/Select.class.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace Driver\SQL\Query;
+
+class Select extends Query {
+
+  private $columns;
+  private $tables;
+  private $conditions;
+  private $joins;
+
+  public function __construct($sql, ...$columns) {
+    parent::__construct($sql);
+    $this->columns = (!empty($columns) && is_array($columns[0])) ? $columns[0] : $columns;
+    $this->tables = array();
+    $this->conditions = array();
+    $this->joins = array();
+  }
+
+  public function from(...$tables) {
+    $this->tables = array_merge($this->tables, $tables);
+    return $this;
+  }
+
+  public function where(...$conditions) {
+    $this->conditions = array_merge($this->conditions, $conditions);
+    return $this;
+  }
+
+  public function innerJoin($table, $columnA, $columnB) {
+    $this->joins[] = new \Driver\SQL\Join("INNER", $table, $columnA, $columnB);
+    return $this;
+  }
+
+  public function leftJoin($table, $columnA, $columnB) {
+    $this->joins[] = new \Driver\SQL\Join("LEFT", $table, $columnA, $columnB);
+    return $this;
+  }
+
+  public function execute() {
+    return $this->sql->executeSelect($this);
+  }
+
+  public function getColumns() { return $this->columns; }
+  public function getTables() { return $this->tables; }
+  public function getConditions() { return $this->conditions; }
+  public function getJoins() { return $this->joins; }
+};
+
+?>