1300 lines
27 KiB
PHP
1300 lines
27 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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* @author Timothy J. Warren
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* @copyright Copyright (c) 2012
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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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class Query_Builder {
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// Compiled query component strings
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private $select_string = '',
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$from_string,
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$set_string,
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$order_string,
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$group_string;
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// Key value pairs
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private $set_array,
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$set_array_keys,
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$order_array,
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$group_array;
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// Values to apply to prepared statements
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private $values;
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// Query-global components
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private $limit,
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$offset;
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// Alias to $this->sql
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private $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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//
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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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private $query_map;
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// Convenience property for connection management
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public $conn_name = "";
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/**
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* Constructor
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*
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* @param object $params - the connection parametere
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*/
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public function __construct($params)
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{
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// Convert array to object
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if (is_array($params))
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{
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$p = new StdClass();
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foreach($params as $key => $val)
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{
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$p->$key = $val;
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}
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$params = $p;
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}
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// Let the connection work with 'conn_db' or 'database'
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$params->conn_db = ( ! isset($params->database))
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? @$params->conn_db
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: @$params->database;
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$params->type = strtolower($params->type);
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$dbtype = ($params->type !== 'postgresql') ? $params->type : 'pgsql';
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// Create the dsn for the database to connect to
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switch($dbtype)
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{
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default:
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$dsn = "dbname={$params->conn_db}";
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if ( ! empty($params->host))
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{
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$dsn .= ";host={$params->host}";
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}
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if ( ! empty($params->port))
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{
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$dsn .= ";port={$params->port}";
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}
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break;
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case "sqlite":
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$dsn = $params->file;
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break;
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case "firebird":
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$dsn = "{$params->host}:{$params->file}";
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break;
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}
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// Create the database connection
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if ( ! empty($params->user))
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{
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$this->db = new $dbtype($dsn, $params->user, $params->pass);
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}
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else
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{
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$this->db = new $dbtype($dsn);
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}
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if (isset($params->name))
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{
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$this->conn_name = $params->name;
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}
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// Make things just slightly shorter
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$this->sql =& $this->db->sql;
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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('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('trim', $fields_array[$key]);
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}
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}
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// Quote the identifiers
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$safe_array = array_map(array($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, $as=FALSE)
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{
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// Escape the identifiers
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$field = $this->quote_ident($field);
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$as = ($as !== FALSE)
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? $this->quote_ident($as)
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: $field;
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// Create the select string
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$this->select_string .= $this->sql->max()."({$field}) AS {$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, $as=FALSE)
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{
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// Escape the identifiers
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$field = $this->quote_ident($field);
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$as = ($as !== FALSE)
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? $this->quote_ident($as)
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: $field;
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// Create the select string
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$this->select_string .= $this->sql->min()."({$field}) AS {$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, $as=FALSE)
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{
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// Escape the identifiers
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$field = $this->quote_ident($field);
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$as = ($as !== FALSE)
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? $this->quote_ident($as)
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: $field;
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// Create the select string
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$this->select_string .= $this->sql->avg()."({$field}) AS {$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, $as=FALSE)
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{
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// Escape the identifiers
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$field = $this->quote_ident($field);
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$as = ($as !== FALSE)
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? $this->quote_ident($as)
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: $field;
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// Create the select string
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$this->select_string .= $this->sql->sum()."({$field}) AS {$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 = $this->sql->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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* Specify the database table to select from
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*
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* @param string $dbname
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* @return $this
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*/
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public function from($dbname)
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{
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// Split identifiers on spaces
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$ident_array = explode(' ', trim($dbname));
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$ident_array = array_map('trim', $ident_array);
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// Quote the identifiers
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$ident_array = array_map(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, $pos='both')
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{
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$field = $this->quote_ident($field);
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// Add the like string into the order map
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$l = $field. ' LIKE ?';
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if ($pos == 'before')
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{
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$val = "%{$val}";
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}
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elseif ($pos == 'after')
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{
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$val = "{$val}%";
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}
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else
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{
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$val = "%{$val}%";
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}
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$this->query_map[] = array(
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'type' => 'like',
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'conjunction' => (empty($this->query_map)) ? 'WHERE ' : ' AND ',
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'string' => $l
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);
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// Add to the values array
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$this->values[] = $val;
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return $this;
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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, $pos='both')
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{
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$field = $this->quote_ident($field);
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// Add the like string into the order map
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$l = $field. ' LIKE ?';
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if ($pos == 'before')
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{
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$val = "%{$val}";
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}
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elseif ($pos == 'after')
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{
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$val = "{$val}%";
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}
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else
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{
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$val = "%{$val}%";
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}
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$this->query_map[] = array(
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'type' => 'like',
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'conjunction' => (empty($this->query_map)) ? 'WHERE ' : ' OR ',
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'string' => $l
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);
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// Add to the values array
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$this->values[] = $val;
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return $this;
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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, $pos='both')
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{
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$field = $this->quote_ident($field);
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// Add the like string into the order map
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$l = $field. ' NOT LIKE ?';
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if ($pos == 'before')
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{
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$val = "%{$val}";
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}
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elseif ($pos == 'after')
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{
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$val = "{$val}%";
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}
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else
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{
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$val = "%{$val}%";
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}
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$this->query_map[] = array(
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'type' => 'like',
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'conjunction' => (empty($this->query_map)) ? ' WHERE ' : ' AND ',
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'string' => $l
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);
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// Add to the values array
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$this->values[] = $val;
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return $this;
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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, $pos='both')
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{
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$field = $this->quote_ident($field);
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// Add the like string into the order map
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$l = $field. ' NOT LIKE ?';
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if ($pos == 'before')
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{
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$val = "%{$val}";
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}
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elseif ($pos == 'after')
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{
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$val = "{$val}%";
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}
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else
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{
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$val = "%{$val}%";
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}
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$this->query_map[] = array(
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'type' => 'like',
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'conjunction' => (empty($this->query_map)) ? ' WHERE ' : ' OR ',
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'string' => $l
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);
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// Add to the values array
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$this->values[] = $val;
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return $this;
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}
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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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// @todo Implement having
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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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// @todo Implement or_having
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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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* Do all the repeditive stuff for where type methods
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*
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* @param mixed $key
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* @param mixed $val
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* @return array
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*/
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private function _where($key, $val=array())
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{
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$where = array();
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// Key and value passed? Add them to the where array
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if (is_scalar($key) && is_scalar($val))
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{
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$where[$key] = $val;
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$this->values[] = $val;
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}
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// Array or object, loop through and add to the where array
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elseif ( ! is_scalar($key))
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{
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foreach($key as $k => $v)
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{
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$where[$k] = $v;
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$this->values[] = $v;
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}
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}
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return $where;
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}
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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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* @return $this
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*/
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public function where($key, $val=array())
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{
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$where = $this->_where($key, $val);
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// Create key/value placeholders
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foreach($where as $f => $val)
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{
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// Split each key by spaces, in case there
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// is an operator such as >, <, !=, etc.
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$f_array = explode(' ', trim($f));
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$item = $this->quote_ident($f_array[0]);
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// Simple key value, or an operator
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$item .= (count($f_array === 1)) ? '= ?' : " {$f_array[1]} ?";
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// Put in the query map for select statements
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$this->query_map[] = array(
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'type' => 'where',
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'conjunction' => ( ! empty($this->query_map)) ? ' AND ' : ' WHERE ',
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'string' => $item
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);
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}
|
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return $this;
|
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}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
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|
* Where clause prefixed with "OR"
|
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*
|
|
* @param string $field
|
|
* @param mixed $val
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* @return $this
|
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*/
|
|
public function or_where($field, $val=array())
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{
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$where = $this->_where($field, $val);
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|
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// Create key/value placeholders
|
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foreach($where as $f => $val)
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{
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// Split each key by spaces, incase there
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// is an operator such as >, <, !=, etc.
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$f_array = explode(' ', trim($f));
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|
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// Simple key = val
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if (count($f_array) === 1)
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{
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$item = $this->quote_ident($f_array[0]) . '= ?';
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}
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else // Other operators
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{
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$item = $this->quote_ident($f_array[0]) . " {$f_array[1]} ?";
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}
|
|
|
|
// Put in the query map for select statements
|
|
$this->query_map[] = array(
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'type' => 'where',
|
|
'conjunction' => ( ! empty($this->query_map)) ? ' OR ' : ' WHERE ',
|
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'string' => $item
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);
|
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}
|
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|
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return $this;
|
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}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Where clause with 'IN' statement
|
|
*
|
|
* @param mixed $field
|
|
* @param mixed $val
|
|
* @return $this
|
|
*/
|
|
public function where_in($field, $val=array())
|
|
{
|
|
$field = $this->quote_ident($field);
|
|
$params = array_fill(0, count($val), '?');
|
|
|
|
foreach($val as $v)
|
|
{
|
|
$this->values[] = $v;
|
|
}
|
|
|
|
$string = $field . ' IN ('.implode(',', $params).') ';
|
|
|
|
$this->query_map[] = array(
|
|
'type' => 'where_in',
|
|
'conjunction' => ( ! empty($this->query_map)) ? ' AND ' : ' WHERE ',
|
|
'string' => $string
|
|
);
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Where in statement prefixed with "or"
|
|
*
|
|
* @param string $field
|
|
* @param mixed $val
|
|
* @return $this
|
|
*/
|
|
public function or_where_in($field, $val=array())
|
|
{
|
|
$field = $this->quote_ident($field);
|
|
$params = array_fill(0, count($val), '?');
|
|
|
|
foreach($val as $v)
|
|
{
|
|
$this->values[] = $v;
|
|
}
|
|
|
|
$string = $field . ' IN ('.implode(',', $params).') ';
|
|
|
|
$this->query_map[] = array(
|
|
'type' => 'where_in',
|
|
'conjunction' => ( ! empty($this->query_map)) ? ' OR ' : ' WHERE ',
|
|
'string' => $string
|
|
);
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* WHERE NOT IN (FOO) clause
|
|
*
|
|
* @param string $field
|
|
* @param mixed $val
|
|
* @return $this
|
|
*/
|
|
public function where_not_in($field, $val=array())
|
|
{
|
|
$field = $this->quote_ident($field);
|
|
$params = array_fill(0, count($val), '?');
|
|
|
|
foreach($val as $v)
|
|
{
|
|
$this->values[] = $v;
|
|
}
|
|
|
|
$string = $field.' NOT IN ('.implode(',', $params).') ';
|
|
|
|
$this->query_map[] = array(
|
|
'type' => 'where_in',
|
|
'conjunction' => ( ! empty($this->query_map)) ? ' AND ' : ' WHERE ',
|
|
'string' => $string
|
|
);
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* OR WHERE NOT IN (FOO) clause
|
|
*
|
|
* @param string $field
|
|
* @param mixed $val
|
|
* @return $this
|
|
*/
|
|
public function or_where_not_in($field, $val=array())
|
|
{
|
|
$field = $this->quote_ident($field);
|
|
$params = array_fill(0, count($val), '?');
|
|
|
|
foreach($val as $v)
|
|
{
|
|
$this->values[] = $v;
|
|
}
|
|
|
|
$string = $field.' NOT IN ('.implode(',', $params).') ';
|
|
|
|
$this->query_map[] = array(
|
|
'type' => 'where_in',
|
|
'conjunction' => ( ! empty($this->query_map)) ? ' OR ' : ' WHERE ',
|
|
'string' => $string
|
|
);
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
// ! Other Query Modifier methods
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Sets values for inserts / updates / deletes
|
|
*
|
|
* @param mixed $key
|
|
* @param mixed $val
|
|
* @return $this
|
|
*/
|
|
public function set($key, $val)
|
|
{
|
|
// Plain key, value pair
|
|
if (is_scalar($key) && is_scalar($val))
|
|
{
|
|
$this->set_array[$key] = $val;
|
|
$this->values[] = $val;
|
|
}
|
|
// Object or array
|
|
elseif ( ! is_scalar($key))
|
|
{
|
|
foreach($key as $k => $v)
|
|
{
|
|
$this->set_array[$k] = $v;
|
|
$this->values[] = $val;
|
|
}
|
|
}
|
|
|
|
// Use the keys of the array to make the insert/update string
|
|
// Escape the field names
|
|
$this->set_array_keys = array_map(array($this->db, 'quote_ident'), array_keys($this->set_array));
|
|
|
|
// Generate the "set" string
|
|
$this->set_string = implode('=?, ', $this->set_array_keys);
|
|
$this->set_string .= '=?';
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Creates a join phrase in a compiled query
|
|
*
|
|
* @param string $table
|
|
* @param string $condition
|
|
* @param string $type
|
|
* @return $this
|
|
*/
|
|
public function join($table, $condition, $type='')
|
|
{
|
|
// Paste it back together
|
|
$table = implode(" ", array_map(array($this->db, 'quote_ident'), explode(' ', trim($table))));
|
|
//$condition = preg_replace('`(\W)`', " $1 ", $condition);
|
|
$cond_array = explode(' ', trim($condition));
|
|
$cond_array = array_map('trim', $cond_array);
|
|
|
|
$condition = $table . ' ON ' . $this->quote_ident($cond_array[0]) . $cond_array[1] .
|
|
' ' . $this->quote_ident($cond_array[2]);
|
|
|
|
$this->query_map[] = array(
|
|
'type' => 'join',
|
|
'conjunction' => strtoupper($type).' JOIN ',
|
|
'string' => $condition,
|
|
);
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Group the results by the selected field(s)
|
|
*
|
|
* @param mixed $field
|
|
* @return $this
|
|
*/
|
|
public function group_by($field)
|
|
{
|
|
if ( ! is_scalar($field))
|
|
{
|
|
$this->group_array = array_map(array($this->db, 'quote_ident'), $field);
|
|
}
|
|
else
|
|
{
|
|
$this->group_array[] = $this->quote_ident($field);
|
|
}
|
|
|
|
$this->group_string = ' GROUP BY ' . implode(', ', $this->group_array);
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Order the results by the selected field(s)
|
|
*
|
|
* @param string $field
|
|
* @param string $type
|
|
* @return $this
|
|
*/
|
|
public function order_by($field, $type="")
|
|
{
|
|
// Random case
|
|
if (stripos($type, 'rand') !== FALSE)
|
|
{
|
|
$type = (($rand = $this->sql->random()) !== FALSE ) ? $rand : 'ASC';
|
|
}
|
|
|
|
// Set fields for later manipulation
|
|
$field = $this->quote_ident($field);
|
|
$this->order_array[$field] = $type;
|
|
|
|
$order_clauses = array();
|
|
|
|
// Flatten key/val pairs into an array of space-separated pairs
|
|
foreach($this->order_array as $k => $v)
|
|
{
|
|
$order_clauses[] = $k . ' ' . strtoupper($v);
|
|
}
|
|
|
|
// Set the final string
|
|
$this->order_string = (empty($rand))
|
|
? ' ORDER BY '.implode(',', $order_clauses)
|
|
: ' ORDER BY'.$rand;
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Set a limit on the current sql statement
|
|
*
|
|
* @param int $limit
|
|
* @param int $offset
|
|
* @return string
|
|
*/
|
|
public function limit($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' => '',
|
|
'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);
|
|
}
|
|
|
|
$sql = $this->_compile();
|
|
|
|
// Do prepared statements for anything involving a "where" clause
|
|
if ( ! empty($this->query_map))
|
|
{
|
|
$result = $this->prepare_execute($sql, $this->values);
|
|
}
|
|
else
|
|
{
|
|
// Otherwise, a simple query will do.
|
|
$result = $this->query($sql);
|
|
}
|
|
|
|
// Reset for next query
|
|
$this->_reset();
|
|
|
|
return $result;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* 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->quote_ident($table);
|
|
$res = $this->query($sql);
|
|
return 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='')
|
|
{
|
|
// @todo Implement count_all_results
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
$sql = $this->_compile("insert", $table);
|
|
|
|
$res = $this->prepare_execute($sql, $this->values);
|
|
|
|
$this->_reset();
|
|
|
|
return $res;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
$sql = $this->_compile('update', $table);
|
|
|
|
$res = $this->prepare_execute($sql, $this->values);
|
|
|
|
$this->_reset();
|
|
|
|
// Run the query
|
|
return $res;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
// Create the SQL and parameters
|
|
$sql = $this->_compile("delete", $table);
|
|
|
|
$res = $this->prepare_execute($sql, $this->values);
|
|
|
|
$this->_reset();
|
|
|
|
// Delete the table rows, and return the result
|
|
return $res;
|
|
}
|
|
|
|
|
|
// --------------------------------------------------------------------------
|
|
// ! Miscellaneous Methods
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Calls a function further down the inheritence chain
|
|
*
|
|
* @param string $name
|
|
* @param array $params
|
|
* @return mixed
|
|
*/
|
|
public function __call($name, $params)
|
|
{
|
|
if (method_exists($this->db, $name))
|
|
{
|
|
return call_user_func_array(array($this->db, $name), $params);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Clear out the class variables, so the next query can be run
|
|
*/
|
|
private function _reset()
|
|
{
|
|
// Only unset class variables that
|
|
// are not callable. Otherwise, we'll
|
|
// delete class methods!
|
|
foreach($this as $name => $var)
|
|
{
|
|
// Skip properties that are needed for every query
|
|
$save_properties = array(
|
|
'db',
|
|
'sql'
|
|
);
|
|
|
|
if (in_array($name, $save_properties))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
// Nothing query-generation related is safe!
|
|
if ( ! is_callable($this->$name))
|
|
{
|
|
$this->$name = NULL;
|
|
}
|
|
|
|
// Set values as an empty array
|
|
$this->values = array();
|
|
|
|
// Set select string as an empty string, for proper handling
|
|
// of the 'distinct' keyword
|
|
$this->select_string = '';
|
|
}
|
|
}
|
|
|
|
// --------------------------------------------------------------------------
|
|
|
|
/**
|
|
* String together the sql statements for sending to the db
|
|
*
|
|
* @param string $type
|
|
* @param string $table
|
|
* @return $string
|
|
*/
|
|
private function _compile($type='', $table="")
|
|
{
|
|
$sql = '';
|
|
|
|
switch($type)
|
|
{
|
|
default:
|
|
$sql = 'SELECT * FROM '.$this->from_string;
|
|
|
|
// Set the select string
|
|
if ( ! empty($this->select_string))
|
|
{
|
|
// Replace the star with the selected fields
|
|
$sql = str_replace('*', $this->select_string, $sql);
|
|
}
|
|
|
|
// Set the where string
|
|
if ( ! empty($this->query_map))
|
|
{
|
|
foreach($this->query_map as $q)
|
|
{
|
|
$sql .= $q['conjunction'] . $q['string'];
|
|
}
|
|
}
|
|
|
|
// Set the group_by string
|
|
if ( ! empty($this->group_string))
|
|
{
|
|
$sql .= $this->group_string;
|
|
}
|
|
|
|
// Set the order_by string
|
|
if ( ! empty($this->order_string))
|
|
{
|
|
$sql .= $this->order_string;
|
|
}
|
|
|
|
// Set the limit via the class variables
|
|
if (isset($this->limit) && is_numeric($this->limit))
|
|
{
|
|
$sql = $this->sql->limit($sql, $this->limit, $this->offset);
|
|
}
|
|
break;
|
|
|
|
case "insert":
|
|
$param_count = count($this->set_array);
|
|
$params = array_fill(0, $param_count, '?');
|
|
$sql = 'INSERT INTO '. $this->quote_ident($table) .
|
|
' (' . implode(', ', $this->set_array_keys) .
|
|
') VALUES ('.implode(', ', $params).')';
|
|
break;
|
|
|
|
case "update":
|
|
$sql = 'UPDATE '.$this->quote_ident($table). ' SET '. $this->set_string;
|
|
|
|
// Set the where string
|
|
if ( ! empty($this->query_map))
|
|
{
|
|
foreach($this->query_map as $q)
|
|
{
|
|
$sql .= $q['conjunction'] . $q['string'];
|
|
}
|
|
}
|
|
break;
|
|
|
|
case "delete":
|
|
$sql = 'DELETE FROM '.$this->quote_ident($table);
|
|
|
|
// Set the where string
|
|
if ( ! empty($this->query_map))
|
|
{
|
|
foreach($this->query_map as $q)
|
|
{
|
|
$sql .= $q['conjunction'] . $q['string'];
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
//echo $sql . '<br />';
|
|
|
|
return $sql;
|
|
}
|
|
}
|
|
// End of query_builder.php
|