<?php

/**
 * This class is used to test database is well-constructed.
 */
class FreshRSS_DatabaseDAO extends Minz_ModelPdo {
	public function tablesAreCorrect() {
		$sql = 'SHOW TABLES';
		$stm = $this->bd->prepare($sql);
		$stm->execute();
		$res = $stm->fetchAll(PDO::FETCH_ASSOC);

		$tables = array(
			$this->prefix . 'category' => false,
			$this->prefix . 'feed' => false,
			$this->prefix . 'entry' => false,
		);
		foreach ($res as $value) {
			$tables[array_pop($value)] = true;
		}

		return count(array_keys($tables, true, true)) == count($tables);
	}

	public function getSchema($table) {
		$sql = 'DESC ' . $this->prefix . $table;
		$stm = $this->bd->prepare($sql);
		$stm->execute();

		return $this->listDaoToSchema($stm->fetchAll(PDO::FETCH_ASSOC));
	}

	public function checkTable($table, $schema) {
		$columns = $this->getSchema($table);

		$ok = (count($columns) == count($schema));
		foreach ($columns as $c) {
			$ok &= in_array($c['name'], $schema);
		}

		return $ok;
	}

	public function categoryIsCorrect() {
		return $this->checkTable('category', array(
			'id', 'name'
		));
	}

	public function feedIsCorrect() {
		return $this->checkTable('feed', array(
			'id', 'url', 'category', 'name', 'website', 'description', 'lastUpdate',
			'priority', 'pathEntries', 'httpAuth', 'error', 'keep_history', 'ttl',
			'cache_nbEntries', 'cache_nbUnreads'
		));
	}

	public function entryIsCorrect() {
		return $this->checkTable('entry', array(
			'id', 'guid', 'title', 'author', 'content_bin', 'link', 'date', 'is_read',
			'is_favorite', 'id_feed', 'tags'
		));
	}

	public function daoToSchema($dao) {
		return array(
			'name' => $dao['Field'],
			'type' => strtolower($dao['Type']),
			'notnull' => (bool)$dao['Null'],
			'default' => $dao['Default'],
		);
	}

	public function listDaoToSchema($listDAO) {
		$list = array();

		foreach ($listDAO as $dao) {
			$list[] = $this->daoToSchema($dao);
		}

		return $list;
	}

	public function size($all = false) {
		$db = FreshRSS_Context::$system_conf->db;
		$sql = 'SELECT SUM(data_length + index_length) FROM information_schema.TABLES WHERE table_schema=?';	//MySQL
		$values = array($db['base']);
		if (!$all) {
			$sql .= ' AND table_name LIKE ?';
			$values[] = $this->prefix . '%';
		}
		$stm = $this->bd->prepare($sql);
		$stm->execute($values);
		$res = $stm->fetchAll(PDO::FETCH_COLUMN, 0);
		return $res[0];
	}

	public function optimize() {
		$ok = true;

		$sql = 'OPTIMIZE TABLE `' . $this->prefix . 'entry`';	//MySQL
		$stm = $this->bd->prepare($sql);
		$ok &= $stm != false;
		if ($stm) {
			$ok &= $stm->execute();
		}

		$sql = 'OPTIMIZE TABLE `' . $this->prefix . 'feed`';	//MySQL
		$stm = $this->bd->prepare($sql);
		$ok &= $stm != false;
		if ($stm) {
			$ok &= $stm->execute();
		}

		$sql = 'OPTIMIZE TABLE `' . $this->prefix . 'category`';	//MySQL
		$stm = $this->bd->prepare($sql);
		$ok &= $stm != false;
		if ($stm) {
			$ok &= $stm->execute();
		}

		return $ok;
	}
}