1008 lines
22 KiB
PHP
1008 lines
22 KiB
PHP
<?php
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/**
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* Query
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*
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* Free Query Builder / Database Abstraction Layer
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*
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* @package Query
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* @author Timothy J. Warren
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* @copyright Copyright (c) 2012 - 2014
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* @link https://github.com/aviat4ion/Query
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* @license http://philsturgeon.co.uk/code/dbad-license
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*/
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// --------------------------------------------------------------------------
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/**
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* Convienience class for creating sql queries - also the class that
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* instantiates the specific db driver
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*
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* @package Query
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* @subpackage Query
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*/
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class Query_Builder extends Abstract_Query_Builder {
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// --------------------------------------------------------------------------
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// ! SQL Clause Strings
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// --------------------------------------------------------------------------
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// Compiled 'select' clause
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protected $select_string = '';
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// Compiled 'from' clause
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protected $from_string;
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// Compiled arguments for insert / update
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protected $set_string;
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// Order by clause
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protected $order_string;
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// Group by clause
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protected $group_string;
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// --------------------------------------------------------------------------
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// ! SQL Clause Arrays
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// --------------------------------------------------------------------------
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// Keys for insert/update statement
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protected $set_array_keys = array();
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// Key/val pairs for order by clause
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protected $order_array = array();
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// Key/val pairs for group by clause
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protected $group_array = array();
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// --------------------------------------------------------------------------
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// ! Other Class vars
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// --------------------------------------------------------------------------
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// Values to apply to prepared statements
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protected $values = array();
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// Values to apply to where clauses in prepared statements
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protected $where_values = array();
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// Value for limit string
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protected $limit;
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// Value for offset in limit string
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protected $offset;
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// Alias to $this->db->sql
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public $sql;
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// Query component order mapping
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// for complex select queries
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//
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// Format:
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// array(
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// 'type' => 'where',
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// 'conjunction' => ' AND ',
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// 'string' => 'k=?'
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// )
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protected $query_map = array();
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// Map for having clause
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protected $having_map;
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// Convenience property for connection management
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public $conn_name = "";
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// List of sql queries executed
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public $queries;
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// Whether to do only an explain on the query
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protected $explain;
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// Subclass instances
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public $db;
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protected $parser;
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public $util;
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// --------------------------------------------------------------------------
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// ! Methods
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// --------------------------------------------------------------------------
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/**
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* Constructor
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*
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* @param DB_PDO $db
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* @param object $params - the connection parameters
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*/
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public function __construct($db, $params)
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{
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$this->db = $db;
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// Set the connection name property, if applicable
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if (isset($params->name))
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{
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$this->conn_name = $params->name;
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}
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// Instantiate the Query Parser
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$this->parser = new Query_Parser();
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$this->queries['total_time'] = 0;
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// Make things just slightly shorter
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$this->sql = $this->db->sql;
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$this->util = $this->db->util;
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}
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// --------------------------------------------------------------------------
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/**
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* Destructor
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*/
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public function __destruct()
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{
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$this->db = NULL;
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}
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// --------------------------------------------------------------------------
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// ! Select Queries
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// --------------------------------------------------------------------------
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/**
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* Specifies rows to select in a query
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*
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* @param string $fields
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* @return $this
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*/
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public function select($fields)
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{
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// Split fields by comma
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$fields_array = explode(",", $fields);
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$fields_array = array_map('mb_trim', $fields_array);
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// Split on 'As'
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foreach ($fields_array as $key => $field)
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{
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if (stripos($field, 'as') !== FALSE)
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{
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$fields_array[$key] = preg_split('` as `i', $field);
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$fields_array[$key] = array_map('mb_trim', $fields_array[$key]);
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}
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}
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// Quote the identifiers
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$safe_array = $this->db->quote_ident($fields_array);
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unset($fields_array);
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// Join the strings back together
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for($i = 0, $c = count($safe_array); $i < $c; $i++)
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{
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if (is_array($safe_array[$i]))
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{
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$safe_array[$i] = implode(' AS ', $safe_array[$i]);
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}
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}
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$this->select_string .= implode(', ', $safe_array);
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unset($safe_array);
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return $this;
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}
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// --------------------------------------------------------------------------
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/**
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* Selects the maximum value of a field from a query
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*
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* @param string $field
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* @param string $as
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* @return $this
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*/
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public function select_max($field, $as=FALSE)
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{
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// Create the select string
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$this->select_string .= ' MAX'.$this->_select($field, $as);
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return $this;
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}
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// --------------------------------------------------------------------------
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/**
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* Selects the minimum value of a field from a query
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*
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* @param string $field
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* @param string $as
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* @return $this
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*/
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public function select_min($field, $as=FALSE)
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{
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// Create the select string
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$this->select_string .= ' MIN'.$this->_select($field, $as);
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return $this;
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}
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// --------------------------------------------------------------------------
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/**
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* Selects the average value of a field from a query
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*
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* @param string $field
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* @param string $as
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* @return $this
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*/
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public function select_avg($field, $as=FALSE)
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{
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// Create the select string
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$this->select_string .= ' AVG'.$this->_select($field, $as);
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return $this;
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}
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// --------------------------------------------------------------------------
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/**
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* Selects the sum of a field from a query
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*
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* @param string $field
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* @param string $as
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* @return $this
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*/
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public function select_sum($field, $as=FALSE)
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{
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// Create the select string
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$this->select_string .= ' SUM'.$this->_select($field, $as);
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return $this;
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}
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// --------------------------------------------------------------------------
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/**
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* Adds the 'distinct' keyword to a query
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*
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* @return $this
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*/
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public function distinct()
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{
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// Prepend the keyword to the select string
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$this->select_string = ' DISTINCT '.$this->select_string;
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return $this;
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}
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// --------------------------------------------------------------------------
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/**
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* Tell the database to give you the query plan instead of result set
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*
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* @return $this
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*/
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public function explain()
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{
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$this->explain = TRUE;
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return $this;
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}
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// --------------------------------------------------------------------------
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/**
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* Specify the database table to select from
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*
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* @param string $tblname
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* @return $this
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*/
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public function from($tblname)
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{
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// Split identifiers on spaces
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$ident_array = explode(' ', mb_trim($tblname));
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$ident_array = array_map('mb_trim', $ident_array);
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// Quote the identifiers
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$ident_array[0] = $this->db->quote_table($ident_array[0]);
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$ident_array = $this->db->quote_ident($ident_array);
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// Paste it back together
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$this->from_string = implode(' ', $ident_array);
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return $this;
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}
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// --------------------------------------------------------------------------
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// ! 'Like' methods
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// --------------------------------------------------------------------------
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/**
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* Creates a Like clause in the sql statement
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*
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* @param string $field
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* @param mixed $val
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* @param string $pos
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* @return $this
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*/
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public function like($field, $val, $pos='both')
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{
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return $this->_like($field, $val, $pos, 'LIKE', 'AND');
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}
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// --------------------------------------------------------------------------
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/**
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* Generates an OR Like clause
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*
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* @param string $field
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* @param mixed $val
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* @param string $pos
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* @return $this
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*/
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public function or_like($field, $val, $pos='both')
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{
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return $this->_like($field, $val, $pos, 'LIKE', 'OR');
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}
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// --------------------------------------------------------------------------
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/**
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* Generates a NOT LIKE clause
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*
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* @param string $field
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* @param mixed $val
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* @param string $pos
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* @return $this
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*/
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public function not_like($field, $val, $pos='both')
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{
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return $this->_like($field, $val, $pos, 'NOT LIKE', 'AND');
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}
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// --------------------------------------------------------------------------
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/**
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* Generates a OR NOT LIKE clause
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*
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* @param string $field
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* @param mixed $val
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* @param string $pos
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* @return $this
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*/
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public function or_not_like($field, $val, $pos='both')
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{
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return $this->_like($field, $val, $pos, 'NOT LIKE', 'OR');
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}
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// --------------------------------------------------------------------------
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// ! Having methods
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// --------------------------------------------------------------------------
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/**
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* Generates a 'Having' clause
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*
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* @param mixed $key
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* @param mixed $val
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* @return $this
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*/
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public function having($key, $val=array())
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{
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return $this->_having($key, $val, 'AND');
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}
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// --------------------------------------------------------------------------
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/**
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* Generates a 'Having' clause prefixed with 'OR'
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*
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* @param mixed $key
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* @param mixed $val
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* @return $this
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*/
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public function or_having($key, $val=array())
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{
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return $this->_having($key, $val, 'OR');
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}
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// --------------------------------------------------------------------------
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// ! 'Where' methods
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// --------------------------------------------------------------------------
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/**
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* Specify condition(s) in the where clause of a query
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* Note: this function works with key / value, or a
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* passed array with key / value pairs
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*
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* @param mixed $key
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* @param mixed $val
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* @param mixed $escape
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* @return $this
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*/
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public function where($key, $val=array(), $escape=NULL)
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{
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return $this->_where_string($key, $val, 'AND');
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}
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// --------------------------------------------------------------------------
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/**
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* Where clause prefixed with "OR"
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*
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* @param string $key
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* @param mixed $val
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* @return $this
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*/
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public function or_where($key, $val=array())
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{
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return $this->_where_string($key, $val, 'OR');
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}
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// --------------------------------------------------------------------------
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/**
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* Where clause with 'IN' statement
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*
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* @param mixed $field
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* @param mixed $val
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* @return $this
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*/
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public function where_in($field, $val=array())
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{
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return $this->_where_in($field, $val);
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}
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// --------------------------------------------------------------------------
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/**
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* Where in statement prefixed with "or"
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*
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* @param string $field
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* @param mixed $val
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* @return $this
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*/
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public function or_where_in($field, $val=array())
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{
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return $this->_where_in($field, $val, 'IN', 'OR');
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}
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// --------------------------------------------------------------------------
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/**
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* WHERE NOT IN (FOO) clause
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*
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* @param string $field
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* @param mixed $val
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* @return $this
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*/
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public function where_not_in($field, $val=array())
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{
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return $this->_where_in($field, $val, 'NOT IN', 'AND');
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}
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// --------------------------------------------------------------------------
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/**
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* OR WHERE NOT IN (FOO) clause
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*
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* @param string $field
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* @param mixed $val
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* @return $this
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*/
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public function or_where_not_in($field, $val=array())
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{
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return $this->_where_in($field, $val, 'NOT IN', 'OR');
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}
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// --------------------------------------------------------------------------
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// ! Other Query Modifier methods
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// --------------------------------------------------------------------------
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/**
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* Sets values for inserts / updates / deletes
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*
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* @param mixed $key
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* @param mixed $val
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* @return $this
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*/
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public function set($key, $val = NULL)
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{
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// Plain key, value pair
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if (is_scalar($key) && is_scalar($val))
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{
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$this->set_array_keys[] = $key;
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$this->values[] = $val;
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}
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// Object or array
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elseif (is_array($key) || is_object($key))
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{
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foreach($key as $k => $v)
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{
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$this->set_array_keys[] = $k;
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$this->values[] = $v;
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}
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}
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// Use the keys of the array to make the insert/update string
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// Escape the field names
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$this->set_array_keys = array_map(array($this->db, '_quote'), $this->set_array_keys);
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// Generate the "set" string
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$this->set_string = implode('=?,', $this->set_array_keys);
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$this->set_string .= '=?';
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return $this;
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}
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// --------------------------------------------------------------------------
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/**
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* Creates a join phrase in a compiled query
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*
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* @param string $table
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* @param string $condition
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* @param string $type
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* @return $this
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*/
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public function join($table, $condition, $type='')
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{
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// Prefix and quote table name
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$table = explode(' ', mb_trim($table));
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$table[0] = $this->db->quote_table($table[0]);
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$table = $this->db->quote_ident($table);
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$table = implode(' ', $table);
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// Parse out the join condition
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$parts = $this->parser->parse_join($condition);
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$count = count($parts['identifiers']);
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// Go through and quote the identifiers
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for($i=0; $i <= $count; $i++)
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{
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if (in_array($parts['combined'][$i], $parts['identifiers']) && ! is_numeric($parts['combined'][$i]))
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{
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$parts['combined'][$i] = $this->db->quote_ident($parts['combined'][$i]);
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}
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}
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$parsed_condition = implode('', $parts['combined']);
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$condition = $table . ' ON ' . $parsed_condition;
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$this->query_map[] = array(
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'type' => 'join',
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'conjunction' => "\n" . strtoupper($type) . ' JOIN ',
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'string' => $condition,
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);
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return $this;
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}
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// --------------------------------------------------------------------------
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/**
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* Group the results by the selected field(s)
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*
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* @param mixed $field
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* @return $this
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*/
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public function group_by($field)
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{
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if ( ! is_scalar($field))
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{
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$new_group_array = array_map(array($this->db, 'quote_ident'), $field);
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$this->group_array = array_merge($this->group_array, $new_group_array);
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}
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else
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{
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$this->group_array[] = $this->db->quote_ident($field);
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}
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$this->group_string = ' GROUP BY ' . implode(',', $this->group_array);
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return $this;
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}
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// --------------------------------------------------------------------------
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/**
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* Order the results by the selected field(s)
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*
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* @param string $field
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* @param string $type
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* @return $this
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*/
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public function order_by($field, $type="")
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{
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// Random case
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if (stripos($type, 'rand') !== FALSE)
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{
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$type = (($rand = $this->sql->random()) !== FALSE ) ? $rand : 'ASC';
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}
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// Set fields for later manipulation
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$field = $this->db->quote_ident($field);
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$this->order_array[$field] = $type;
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$order_clauses = array();
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// Flatten key/val pairs into an array of space-separated pairs
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foreach($this->order_array as $k => $v)
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{
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$order_clauses[] = $k . ' ' . strtoupper($v);
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}
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// Set the final string
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$this->order_string = (empty($rand))
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? "\nORDER BY ".implode(', ', $order_clauses)
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: "\nORDER BY".$rand;
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return $this;
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}
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// --------------------------------------------------------------------------
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/**
|
|
* Set a limit on the current sql statement
|
|
*
|
|
* @param int $limit
|
|
* @param int $offset
|
|
* @return Query_Builder
|
|
*/
|
|
public function limit($limit, $offset=FALSE)
|
|
{
|
|
$this->limit = $limit;
|
|
$this->offset = $offset;
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// ! Query Grouping Methods
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Adds a paren to the current query for query grouping
|
|
*
|
|
* @return $this
|
|
*/
|
|
public function group_start()
|
|
{
|
|
$this->query_map[] = array(
|
|
'type' => 'group_start',
|
|
'conjunction' => (empty($this->query_map)) ? ' WHERE ' : ' ',
|
|
'string' => '('
|
|
);
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Adds a paren to the current query for query grouping,
|
|
* prefixed with 'OR'
|
|
*
|
|
* @return $this
|
|
*/
|
|
public function or_group_start()
|
|
{
|
|
$this->query_map[] = array(
|
|
'type' => 'group_start',
|
|
'conjunction' => '',
|
|
'string' => ' OR ('
|
|
);
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Adds a paren to the current query for query grouping,
|
|
* prefixed with 'OR NOT'
|
|
*
|
|
* @return $this
|
|
*/
|
|
public function or_not_group_start()
|
|
{
|
|
$this->query_map[] = array(
|
|
'type' => 'group_start',
|
|
'conjunction' => '',
|
|
'string' => ' OR NOT ('
|
|
);
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Ends a query group
|
|
*
|
|
* @return $this
|
|
*/
|
|
public function group_end()
|
|
{
|
|
$this->query_map[] = array(
|
|
'type' => 'group_end',
|
|
'conjunction' => '',
|
|
'string' => ')'
|
|
);
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// ! Query execution methods
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Select and retrieve all records from the current table, and/or
|
|
* execute current compiled query
|
|
*
|
|
* @param $table
|
|
* @param int $limit
|
|
* @param int $offset
|
|
* @return object
|
|
*/
|
|
public function get($table='', $limit=FALSE, $offset=FALSE)
|
|
{
|
|
// Set the table
|
|
if ( ! empty($table))
|
|
{
|
|
$this->from($table);
|
|
}
|
|
|
|
// Set the limit, if it exists
|
|
if ($limit !== FALSE)
|
|
{
|
|
$this->limit($limit, $offset);
|
|
}
|
|
|
|
return $this->_run("get", $table);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Convience method for get() with a where clause
|
|
*
|
|
* @param string $table
|
|
* @param array $where
|
|
* @param int $limit
|
|
* @param int $offset
|
|
* @return object
|
|
*/
|
|
public function get_where($table, $where=array(), $limit=FALSE, $offset=FALSE)
|
|
{
|
|
// Create the where clause
|
|
$this->where($where);
|
|
|
|
// Return the result
|
|
return $this->get($table, $limit, $offset);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Retreive the number of rows in the selected table
|
|
*
|
|
* @param string $table
|
|
* @return int
|
|
*/
|
|
public function count_all($table)
|
|
{
|
|
$sql = 'SELECT * FROM '.$this->db->quote_table($table);
|
|
$res = $this->db->query($sql);
|
|
return (int) count($res->fetchAll());
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Retrieve the number of results for the generated query - used
|
|
* in place of the get() method
|
|
*
|
|
* @param string $table
|
|
* @return int
|
|
*/
|
|
public function count_all_results($table='')
|
|
{
|
|
// Set the table
|
|
if ( ! empty($table))
|
|
{
|
|
$this->from($table);
|
|
}
|
|
|
|
$result = $this->_run('get', $table);
|
|
|
|
|
|
$rows = $result->fetchAll();
|
|
|
|
return (int) count($rows);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Creates an insert clause, and executes it
|
|
*
|
|
* @param string $table
|
|
* @param mixed $data
|
|
* @return mixed
|
|
*/
|
|
public function insert($table, $data=array())
|
|
{
|
|
// No use duplicating logic!
|
|
if ( ! empty($data))
|
|
{
|
|
$this->set($data);
|
|
}
|
|
|
|
return $this->_run("insert", $table);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Create sql for batch insert
|
|
*
|
|
* @param string $table
|
|
* @param array $data
|
|
* @return string
|
|
*/
|
|
public function insert_batch($table, $data=array())
|
|
{
|
|
// Get the generated values and sql string
|
|
list($sql, $data) = $this->db->insert_batch($table, $data);
|
|
|
|
if ( ! is_null($sql))
|
|
{
|
|
return $this->_run('', $table, $sql, $data);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Creates an update clause, and executes it
|
|
*
|
|
* @param string $table
|
|
* @param mixed $data
|
|
* @return mixed
|
|
*/
|
|
public function update($table, $data=array())
|
|
{
|
|
// No use duplicating logic!
|
|
if ( ! empty($data))
|
|
{
|
|
$this->set($data);
|
|
}
|
|
|
|
return $this->_run("update", $table);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Deletes data from a table
|
|
*
|
|
* @param string $table
|
|
* @param mixed $where
|
|
* @return mixed
|
|
*/
|
|
public function delete($table, $where='')
|
|
{
|
|
// Set the where clause
|
|
if ( ! empty($where))
|
|
{
|
|
$this->where($where);
|
|
}
|
|
|
|
return $this->_run("delete", $table);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// ! SQL Returning Methods
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Returns the generated 'select' sql query
|
|
*
|
|
* @param string $table
|
|
* @param bool $reset
|
|
* @return string
|
|
*/
|
|
public function get_compiled_select($table='', $reset=TRUE)
|
|
{
|
|
// Set the table
|
|
if ( ! empty($table))
|
|
{
|
|
$this->from($table);
|
|
}
|
|
|
|
return $this->_get_compile('select', $table, $reset);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Returns the generated 'insert' sql query
|
|
*
|
|
* @param string $table
|
|
* @param bool $reset
|
|
* @return string
|
|
*/
|
|
public function get_compiled_insert($table, $reset=TRUE)
|
|
{
|
|
return $this->_get_compile('insert', $table, $reset);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Returns the generated 'update' sql query
|
|
*
|
|
* @param string $table
|
|
* @param bool $reset
|
|
* @return string
|
|
*/
|
|
public function get_compiled_update($table='', $reset=TRUE)
|
|
{
|
|
return $this->_get_compile('update', $table, $reset);
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Returns the generated 'delete' sql query
|
|
*
|
|
* @param string $table
|
|
* @param bool $reset
|
|
* @return string
|
|
*/
|
|
public function get_compiled_delete($table="", $reset=TRUE)
|
|
{
|
|
return $this->_get_compile('delete', $table, $reset);
|
|
}
|
|
|
|
|
|
// --------------------------------------------------------------------------
|
|
// ! Miscellaneous Methods
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Clear out the class variables, so the next query can be run
|
|
*
|
|
* @return void
|
|
*/
|
|
public function reset_query()
|
|
{
|
|
$null_properties = array(
|
|
'select_string',
|
|
'from_string',
|
|
'set_string',
|
|
'order_string',
|
|
'group_string',
|
|
'limit',
|
|
'offset',
|
|
'explain'
|
|
);
|
|
|
|
$array_properties = array(
|
|
'set_array_keys',
|
|
'order_array',
|
|
'group_array',
|
|
'values',
|
|
'where_values',
|
|
'query_map',
|
|
'having_map'
|
|
);
|
|
|
|
// Reset strings and booleans
|
|
foreach($null_properties as $var)
|
|
{
|
|
$this->$var = NULL;
|
|
}
|
|
|
|
// Reset arrays
|
|
foreach($array_properties as $var)
|
|
{
|
|
$this->$var = array();
|
|
}
|
|
}
|
|
}
|
|
// End of query_builder.php
|