First commit

2014-04-17 22:05:44 -05:00
commit 703a7d5bbd
4 changed files with 204 additions and 0 deletions
--- a/system/vendor/DB.php
+++ b/system/vendor/DB.php
@@ -0,0 +1,129 @@
+<?php
+/**
+ * Provides a database wrapper around the PDO service to help reduce the effort
+ * to interact with a RDBMS such as SQLite, MySQL, or PostgreSQL.
+ *
+ * 	DB::$c = new PDO($dsn);
+ *
+ * @author	David Pennington
+ * @copyright	(c) 2012 xeoncross.com
+ * @license	MIT License <http://www.opensource.org/licenses/mit-license.php>
+ ********************************** 80 Columns *********************************
+ */
+class DB
+{
+	static $q,$c,$p,$i = '`';
+
+	/**
+	 * Fetch a column offset from the result set (COUNT() queries)
+	 *
+	 * @param string $query query string
+	 * @param array $params query parameters
+	 * @param integer $key index of column offset
+	 * @return array|null
+	 */
+	static function column($query, $params = NULL, $key = 0)
+	{
+		if($statement = DB::query($query, $params))
+			return $statement->fetchColumn($key);
+	}
+
+	/**
+	 * Fetch a single query result row
+	 *
+	 * @param string $query query string
+	 * @param array $params query parameters
+	 * @return mixed
+	 */
+	static function row($query, $params = NULL)
+	{
+		if($statement = DB::query($query, $params))
+			return $statement->fetch();
+	}
+
+	/**
+	 * Fetches an associative array of all rows as key-value pairs (first
+	 * column is the key, second column is the value).
+	 *
+	 * @param string $query query string
+	 * @param array $params query parameters
+	 * @return array
+	 */
+	static function pairs($query, $params = NULL)
+	{
+		$data = array();
+
+		if($statement = DB::query($query, $params))
+			while($row = $statement->fetch(\PDO::FETCH_NUM))
+				$data[$row[0]] = $row[1];
+
+		return $data;
+	}
+
+	/**
+	 * Fetch all query result rows
+	 *
+	 * @param string $query query string
+	 * @param array $params query parameters
+	 * @param int $column the optional column to return
+	 * @return array
+	 */
+	static function fetch($query, $params = NULL, $column = NULL)
+	{
+		if( ! $statement = DB::query($query, $params)) return;
+
+		// Return an array of records
+		if($column === NULL) return $statement->fetchAll();
+
+		// Fetch a certain column from all rows
+		return $statement->fetchAll(\PDO::FETCH_COLUMN, $column);
+	}
+
+	/**
+	 * Prepare and send a query returning the PDOStatement
+	 *
+	 * @param string $query query string
+	 * @param array $params query parameters
+	 * @return object|null
+	 */
+	static function query($query, $params = NULL)
+	{
+		$statement = static::$c->prepare(DB::$q[] = strtr($query, '`', DB::$i));
+		$statement->execute($params);
+		return $statement;
+	}
+
+	/**
+	 * Insert a row into the database
+	 *
+	 * @param string $table name
+	 * @param array $data
+	 * @return integer|null
+	 */
+	static function insert($table, array $data)
+	{
+		$query = "INSERT INTO`$table`(`" . implode('`,`', array_keys($data))
+			. '`)VALUES(' . rtrim(str_repeat('?,', count($data = array_values($data))), ',') . ')';
+		return DB::$p
+			? DB::column($query . 'RETURNING`id`', $data)
+			: (DB::query($query, $data) ? static::$c->lastInsertId() : NULL);
+	}
+
+	/**
+	 * Update a database row
+	 *
+	 * @param string $table name
+	 * @param array $data
+	 * @param array $w where conditions
+	 * @return integer|null
+	 */
+	static function update($table, $data, $value, $column = 'id')
+	{
+		$keys = implode('`=?,`', array_keys($data));
+		if($statement = DB::query(
+			"UPDATE`$table`SET`$keys`=? WHERE`$column`=?",
+			array_values($data + array($value))
+		))
+			return $statement->rowCount();
+	}
+}