923 lines
22 KiB
PHP
923 lines
22 KiB
PHP
<?php
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namespace Database;
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use A;
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use Error;
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use Pagination;
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use Str;
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use Sql;
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/**
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*
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* Database Query
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*
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* The query builder is used by the Database class
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* to build SQL queries in a fluent, jquery-style way
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*
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* @package Kirby Toolkit
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* @author Bastian Allgeier <bastian@getkirby.com>
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* @link http://getkirby.com
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* @copyright Bastian Allgeier
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* @license http://www.opensource.org/licenses/mit-license.php MIT License
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*/
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class Query {
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const ERROR_INVALID_QUERY_METHOD = 0;
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protected $database = null;
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// The object which should be fetched for each row
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protected $fetch = 'Obj';
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// The iterator class, which should be used for result sets
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protected $iterator = 'Collection';
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// An array of bindings for the final query
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protected $bindings = array();
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// The table name
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protected $table;
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// The name of the primary key column
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protected $primaryKeyName = 'id';
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// An array with additional join parameters
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protected $join;
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// A list of columns, which should be selected
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protected $select;
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// Boolean for distinct select clauses
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protected $distinct;
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// Boolean for if exceptions should be thrown on failing queries
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protected $fail = false;
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// A list of values for update and insert clauses
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protected $values;
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// WHERE clause
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protected $where;
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// GROUP BY clause
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protected $group;
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// HAVING clause
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protected $having;
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// ORDER BY clause
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protected $order;
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// The offset, which should be applied to the select query
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protected $offset = 0;
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// The limit, which should be applied to the select query
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protected $limit;
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// Boolean to enable query debugging
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protected $debug = false;
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/**
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* Constructor
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*
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* @param Database $database Database object
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* @param string $table Optional name of the table, which should be queried
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*/
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public function __construct($database, $table) {
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$this->database = $database;
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$this->table($table);
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if(!$this->table) throw new Error('Invalid table ' . $table);
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}
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/**
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* Reset the query class after each db hit
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*/
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protected function reset() {
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$this->join = null;
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$this->select = null;
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$this->distinct = null;
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$this->fail = false;
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$this->values = null;
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$this->where = null;
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$this->group = null;
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$this->having = null;
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$this->order = null;
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$this->offset = null;
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$this->limit = null;
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$this->debug = null;
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}
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/**
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* Enables query debugging.
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* If enabled, the query will return an array with all important info about
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* the query instead of actually executing the query and returning results
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*
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* @param boolean $debug
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* @return object
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*/
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public function debug($debug = true) {
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$this->debug = $debug;
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return $this;
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}
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/**
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* Enables distinct select clauses.
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*
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* @param boolean $distinct
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* @return object
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*/
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public function distinct($distinct = true) {
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$this->distinct = $distinct;
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return $this;
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}
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/**
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* Enables failing queries.
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* If enabled queries will no longer fail silently but throw an exception
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*
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* @param boolean $fail
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* @return object
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*/
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public function fail($fail = true) {
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$this->fail = $fail;
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return $this;
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}
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/**
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* Sets the object class, which should be fetched
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* Set this to array to get a simple array instead of an object
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*
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* @param string $fetch
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* @return object
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*/
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public function fetch($fetch) {
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if(!is_null($fetch)) $this->fetch = $fetch;
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return $this;
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}
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/**
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* Sets the iterator class, which should be used for multiple results
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* Set this to array to get a simple array instead of an iterator object
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*
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* @param string $iterator
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* @return object
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*/
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public function iterator($iterator) {
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if(!is_null($iterator)) $this->iterator = $iterator;
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return $this;
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}
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/**
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* Sets the name of the table, which should be queried
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*
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* @param string $table
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* @return object
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*/
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public function table($table) {
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if(!is_null($table) && $this->database->validateTable($table)) $this->table = $table;
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return $this;
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}
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/**
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* Sets the name of the primary key column
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*
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* @param string $primaryKeyName
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* @return object
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*/
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public function primaryKeyName($primaryKeyName) {
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$this->primaryKeyName = $primaryKeyName;
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return $this;
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}
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/**
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* Sets the columns, which should be selected from the table
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* By default all columns will be selected
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*
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* @param mixed $select Pass either a string of columns or an array
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* @return object
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*/
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public function select($select) {
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$this->select = $select;
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return $this;
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}
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/**
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* Adds a new join clause to the query
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*
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* @param string $table Name of the table, which should be joined
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* @param string $on The on clause for this join
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* @param string $type The join type. Uses an inner join by default
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* @return object
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*/
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public function join($table, $on, $type = '') {
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$join = array(
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'table' => $table,
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'on' => $on,
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'type' => $type
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);
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$this->join[] = $join;
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return $this;
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}
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/**
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* Shortcut for creating a left join clause
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*
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* @param string $table Name of the table, which should be joined
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* @param string $on The on clause for this join
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* @return object
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*/
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public function leftJoin($table, $on) {
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return $this->join($table, $on, 'left');
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}
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/**
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* Shortcut for creating a right join clause
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*
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* @param string $table Name of the table, which should be joined
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* @param string $on The on clause for this join
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* @return object
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*/
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public function rightJoin($table, $on) {
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return $this->join($table, $on, 'right');
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}
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/**
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* Shortcut for creating an inner join clause
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*
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* @param string $table Name of the table, which should be joined
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* @param string $on The on clause for this join
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* @return object
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*/
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public function innerJoin($table, $on) {
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return $this->join($table, $on, 'inner');
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}
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/**
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* Sets the values which should be used for the update or insert clause
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*
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* @param mixed $values Can either be a string or an array of values
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* @return object
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*/
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public function values($values = array()) {
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if(!is_null($values)) $this->values = $values;
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return $this;
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}
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/**
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* Attaches additional bindings to the query.
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* Also can be used as getter for all attached bindings by not passing an argument.
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*
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* @param mixed $bindings Array of bindings or null to use this method as getter
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* @return mixed
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*/
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public function bindings($bindings = null) {
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if(is_array($bindings)) {
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$this->bindings = array_merge($this->bindings, $bindings);
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return $this;
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}
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return $this->bindings;
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}
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/**
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* Attaches an additional where clause
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*
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* All available ways to add where clauses
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*
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* ->where('username like "myuser"'); (args: 1)
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* ->where(array('username' => 'myuser')); (args: 1)
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* ->where(function($where) { $where->where('id', '=', 1) }) (args: 1)
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* ->where('username like ?', 'myuser') (args: 2)
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* ->where('username', 'like', 'myuser'); (args: 3)
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*
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* @param list
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* @return object
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*/
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public function where() {
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$this->where = $this->filterQuery(func_get_args(), $this->where);
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return $this;
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}
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/**
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* Shortcut to attach a where clause with an OR operator.
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* Check out the where() method docs for additional info.
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*
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* @param list
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* @return object
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*/
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public function orWhere() {
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$args = func_get_args();
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$mode = a::last($args);
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// if there's a where clause mode attribute attached…
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if(in_array($mode, array('AND', 'OR'))) {
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// remove that from the list of arguments
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array_pop($args);
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}
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// make sure to always attach the OR mode indicator
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$args[] = 'OR';
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call_user_func_array(array($this, 'where'), $args);
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return $this;
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}
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/**
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* Shortcut to attach a where clause with an AND operator.
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* Check out the where() method docs for additional info.
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*
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* @param list
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* @return object
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*/
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public function andWhere() {
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$args = func_get_args();
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$mode = a::last($args);
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// if there's a where clause mode attribute attached…
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if(in_array($mode, array('AND', 'OR'))) {
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// remove that from the list of arguments
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array_pop($args);
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}
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// make sure to always attach the AND mode indicator
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$args[] = 'AND';
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call_user_func_array(array($this, 'where'), func_get_args());
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return $this;
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}
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/**
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* Attaches a group by clause
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*
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* @param string $group
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* @return object
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*/
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public function group($group) {
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$this->group = $group;
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return $this;
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}
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/**
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* Attaches an additional having clause
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*
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* All available ways to add having clauses
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*
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* ->having('username like "myuser"'); (args: 1)
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* ->having(array('username' => 'myuser')); (args: 1)
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* ->having(function($having) { $having->having('id', '=', 1) }) (args: 1)
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* ->having('username like ?', 'myuser') (args: 2)
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* ->having('username', 'like', 'myuser'); (args: 3)
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*
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* @param list
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* @return object
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*/
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public function having() {
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$this->having = $this->filterQuery(func_get_args(), $this->having);
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return $this;
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}
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/**
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* Attaches an order clause
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*
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* @param string $order
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* @return object
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*/
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public function order($order) {
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$this->order = $order;
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return $this;
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}
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/**
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* Sets the offset for select clauses
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*
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* @param int $offset
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* @return object
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*/
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public function offset($offset) {
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$this->offset = $offset;
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return $this;
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}
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/**
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* Sets the limit for select clauses
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*
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* @param int $limit
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* @return object
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*/
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public function limit($limit) {
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$this->limit = $limit;
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return $this;
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}
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/**
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* Builds the different types of SQL queries
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* This uses the SQL class to build stuff.
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*
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* @param string $type (select, update, insert)
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* @return string The final query
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*/
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public function build($type) {
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$sql = new SQL($this->database, $this);
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switch($type) {
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case 'select':
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return $sql->select(array(
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'table' => $this->table,
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'columns' => $this->select,
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'join' => $this->join,
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'distinct' => $this->distinct,
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'where' => $this->where,
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'group' => $this->group,
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'having' => $this->having,
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'order' => $this->order,
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'offset' => $this->offset,
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'limit' => $this->limit
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));
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case 'update':
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return $sql->update(array(
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'table' => $this->table,
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'where' => $this->where,
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'values' => $this->values,
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));
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case 'insert':
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return $sql->insert(array(
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'table' => $this->table,
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'values' => $this->values,
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));
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case 'delete':
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return $sql->delete(array(
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'table' => $this->table,
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'where' => $this->where,
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));
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}
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}
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/**
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* Builds a count query
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*
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* @return object
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*/
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public function count() {
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return $this->aggregate('COUNT');
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}
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/**
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* Builds a max query
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*
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* @param string $column
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* @return object
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*/
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public function max($column) {
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return $this->aggregate('MAX', $column);
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}
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/**
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* Builds a min query
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*
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* @param string $column
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* @return object
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*/
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public function min($column) {
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return $this->aggregate('MIN', $column);
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}
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/**
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* Builds a sum query
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*
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* @param string $column
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* @return object
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*/
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public function sum($column) {
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return $this->aggregate('SUM', $column);
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}
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/**
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* Builds an average query
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*
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* @param string $column
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* @return object
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*/
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public function avg($column) {
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return $this->aggregate('AVG', $column);
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}
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/**
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* Builds an aggregation query.
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* This is used by all the aggregation methods above
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*
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* @param string $method
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* @param string $column
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* @param string $default An optional default value, which should be returned if the query fails
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* @return object
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*/
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public function aggregate($method, $column = '*', $default = 0) {
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// reset the sorting to avoid counting issues
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$this->order = null;
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// validate column
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if($column !== '*') {
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$sql = new SQL($this->database, $this);
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list($table, $columnPart) = $sql->splitIdentifier($this->table, $column);
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if(!$this->database->validateColumn($table, $columnPart)) {
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throw new Error('Invalid column ' . $column);
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}
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$column = $sql->combineIdentifier($table, $columnPart);
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}
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$fetch = $this->fetch;
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$row = $this->select($method . '(' . $column . ') as aggregation')->fetch('Obj')->first();
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$result = $row ? $row->get('aggregation') : $default;
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$this->fetch($fetch);
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return $result;
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}
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|
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/**
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* Used as an internal shortcut for firing a db query
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*
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* @param string $query
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* @param array $params
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* @return mixed
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*/
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protected function query($query, $params = array()) {
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if($this->debug) return array(
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'query' => $query,
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'bindings' => $this->bindings(),
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'options' => $params
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);
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if($this->fail) $this->database->fail();
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$result = $this->database->query($query, $this->bindings(), $params);
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$this->reset();
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return $result;
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}
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|
|
/**
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* Used as an internal shortcut for executing a db query
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*
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* @param string $query
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* @param array $params
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* @return mixed
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*/
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protected function execute($query, $params = array()) {
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if($this->debug) return array(
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'query' => $query,
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'bindings' => $this->bindings(),
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'options' => $params
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);
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if($this->fail) $this->database->fail();
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$result = $this->database->execute($query, $this->bindings(), $params);
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$this->reset();
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return $result;
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}
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|
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/**
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|
* Selects only one row from a table
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*
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* @return object
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*/
|
|
public function first() {
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return $this->query($this->offset(0)->limit(1)->build('select'), array(
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'fetch' => $this->fetch,
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'iterator' => 'array',
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'method' => 'fetch',
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));
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}
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|
|
|
/**
|
|
* Selects only one row from a table
|
|
*
|
|
* @return object
|
|
*/
|
|
public function row() {
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return $this->first();
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}
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|
|
|
/**
|
|
* Selects only one row from a table
|
|
*
|
|
* @return object
|
|
*/
|
|
public function one() {
|
|
return $this->first();
|
|
}
|
|
|
|
/**
|
|
* Automatically adds pagination to a query
|
|
*
|
|
* @param int $page
|
|
* @param int $limit The number of rows, which should be returned for each page
|
|
* @param array $params Optional params for the pagination object
|
|
* @return object Collection iterator with attached pagination object
|
|
*/
|
|
public function page($page, $limit, $params = array()) {
|
|
|
|
$defaults = array(
|
|
'page' => $page
|
|
);
|
|
|
|
$options = array_merge($defaults, $params);
|
|
|
|
// clone this to create a counter query
|
|
$counter = clone $this;
|
|
|
|
// count the total number of rows for this query
|
|
$count = $counter->count();
|
|
|
|
// pagination
|
|
$pagination = new Pagination($count, $limit, $options);
|
|
|
|
// apply it to the dataset and retrieve all rows. make sure to use Collection as the iterator to be able to attach the pagination object
|
|
$collection = $this->offset($pagination->offset())->limit($pagination->limit())->all();
|
|
|
|
// store all pagination vars in a separate object
|
|
if($collection) $collection->paginate($pagination);
|
|
|
|
// return the limited collection
|
|
return $collection;
|
|
|
|
}
|
|
|
|
/**
|
|
* Returns all matching rows from a table
|
|
*
|
|
* @return mixed
|
|
*/
|
|
public function all() {
|
|
|
|
return $this->query($this->build('select'), array(
|
|
'fetch' => $this->fetch,
|
|
'iterator' => $this->iterator,
|
|
));
|
|
}
|
|
|
|
/**
|
|
* Returns only values from a single column
|
|
*
|
|
* @param string $column
|
|
* @return mixed
|
|
*/
|
|
public function column($column) {
|
|
|
|
$sql = new SQL($this->database, $this);
|
|
$primaryKey = $sql->combineIdentifier($this->table, $this->primaryKeyName);
|
|
|
|
$results = $this->query($this->select(array($column))->order($primaryKey . ' ASC')->build('select'), array(
|
|
'iterator' => 'array',
|
|
'fetch' => 'array',
|
|
));
|
|
|
|
$results = a::extract($results, $column);
|
|
|
|
if($this->iterator == 'array') return $results;
|
|
|
|
$iterator = $this->iterator;
|
|
return new $iterator($results);
|
|
|
|
}
|
|
|
|
/**
|
|
* Find a single row by column and value
|
|
*
|
|
* @param string $column
|
|
* @param mixed $value
|
|
* @return mixed
|
|
*/
|
|
public function findBy($column, $value) {
|
|
return $this->where(array($column => $value))->first();
|
|
}
|
|
|
|
/**
|
|
* Find a single row by its primary key
|
|
*
|
|
* @param mixed $id
|
|
* @return mixed
|
|
*/
|
|
public function find($id) {
|
|
return $this->findBy($this->primaryKeyName, $id);
|
|
}
|
|
|
|
/**
|
|
* Fires an insert query
|
|
*
|
|
* @param array $values You can pass values here or set them with ->values() before
|
|
* @return mixed Returns the last inserted id on success or false.
|
|
*/
|
|
public function insert($values = null) {
|
|
$query = $this->execute($this->values($values)->build('insert'));
|
|
return ($query) ? $this->database->lastId() : false;
|
|
}
|
|
|
|
/**
|
|
* Fires an update query
|
|
*
|
|
* @param array $values You can pass values here or set them with ->values() before
|
|
* @param mixed $where You can pass a where clause here or set it with ->where() before
|
|
* @return boolean
|
|
*/
|
|
public function update($values = null, $where = null) {
|
|
return $this->execute($this->values($values)->where($where)->build('update'));
|
|
}
|
|
|
|
/**
|
|
* Fires a delete query
|
|
*
|
|
* @param mixed $where You can pass a where clause here or set it with ->where() before
|
|
* @return boolean
|
|
*/
|
|
public function delete($where = null) {
|
|
return $this->execute($this->where($where)->build('delete'));
|
|
}
|
|
|
|
/**
|
|
* Enables magic queries like findByUsername or findByEmail
|
|
*
|
|
* @param string $method
|
|
* @param array $arguments
|
|
* @return mixed
|
|
*/
|
|
public function __call($method, $arguments) {
|
|
|
|
if(preg_match('!^findBy([a-z]+)!i', $method, $match)) {
|
|
$column = str::lower($match[1]);
|
|
return $this->findBy($column, $arguments[0]);
|
|
} else {
|
|
throw new Error('Invalid query method: ' . $method, static::ERROR_INVALID_QUERY_METHOD);
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Builder for where and having clauses
|
|
*
|
|
* @param array $args Arguments, see where() description
|
|
* @param string $current Current value (like $this->where)
|
|
* @return string
|
|
*/
|
|
protected function filterQuery($args, $current) {
|
|
|
|
$mode = a::last($args);
|
|
$result = '';
|
|
|
|
// if there's a where clause mode attribute attached…
|
|
if(in_array($mode, array('AND', 'OR'))) {
|
|
// remove that from the list of arguments
|
|
array_pop($args);
|
|
} else {
|
|
$mode = 'AND';
|
|
}
|
|
|
|
switch(count($args)) {
|
|
case 1:
|
|
|
|
if(is_null($args[0])) {
|
|
|
|
return $current;
|
|
|
|
// ->where('username like "myuser"');
|
|
} else if(is_string($args[0])) {
|
|
|
|
// simply add the entire string to the where clause
|
|
// escaping or using bindings has to be done before calling this method
|
|
$result = $args[0];
|
|
|
|
// ->where(array('username' => 'myuser'));
|
|
} else if(is_array($args[0])) {
|
|
|
|
$sql = new SQL($this->database, $this);
|
|
|
|
// simple array mode (AND operator)
|
|
$result = $sql->values($this->table, $args[0], ' AND ', true, true);
|
|
|
|
} else if(is_callable($args[0])) {
|
|
|
|
$query = clone $this;
|
|
call_user_func($args[0], $query);
|
|
$result = '(' . $query->where . ')';
|
|
|
|
}
|
|
|
|
break;
|
|
case 2:
|
|
|
|
// ->where('username like :username', array('username' => 'myuser'))
|
|
if(is_string($args[0]) && is_array($args[1])) {
|
|
|
|
// prepared where clause
|
|
$result = $args[0];
|
|
|
|
// store the bindings
|
|
$this->bindings($args[1]);
|
|
|
|
// ->where('username like ?', 'myuser')
|
|
} else if(is_string($args[0]) && is_string($args[1])) {
|
|
|
|
// prepared where clause
|
|
$result = $args[0];
|
|
|
|
// store the bindings
|
|
$this->bindings(array($args[1]));
|
|
|
|
}
|
|
|
|
break;
|
|
case 3:
|
|
|
|
// ->where('username', 'like', 'myuser');
|
|
if(is_string($args[0]) && is_string($args[1])) {
|
|
|
|
// validate column
|
|
$sql = new SQL($this->database, $this);
|
|
list($table, $column) = $sql->splitIdentifier($this->table, $args[0]);
|
|
if(!$this->database->validateColumn($table, $column)) {
|
|
throw new Error('Invalid column ' . $args[0]);
|
|
}
|
|
$key = $sql->combineIdentifier($table, $column);
|
|
|
|
// ->where('username', 'in', array('myuser', 'myotheruser'));
|
|
if(is_array($args[2])) {
|
|
|
|
$predicate = trim(strtoupper($args[1]));
|
|
if(!in_array($predicate, array(
|
|
'IN', 'NOT IN'
|
|
))) throw new Error('Invalid predicate ' . $predicate);
|
|
|
|
// build a list of bound values
|
|
$values = array();
|
|
$bindings = array();
|
|
foreach($args[2] as $value) {
|
|
$valueBinding = sql::generateBindingName('value');
|
|
$bindings[$valueBinding] = $value;
|
|
$values[] = $valueBinding;
|
|
}
|
|
|
|
// add that to the where clause in parenthesis
|
|
$result = $key . ' ' . $predicate . ' (' . implode(', ', $values) . ')';
|
|
|
|
$this->bindings($bindings);
|
|
|
|
// ->where('username', 'like', 'myuser');
|
|
} else {
|
|
|
|
$predicate = trim(strtoupper($args[1]));
|
|
if(!in_array($predicate, array(
|
|
'=', '>=', '>', '<=', '<', '<>', '!=', '<=>',
|
|
'IS', 'IS NOT',
|
|
'BETWEEN', 'NOT BETWEEN',
|
|
'LIKE', 'NOT LIKE',
|
|
'SOUNDS LIKE',
|
|
'REGEXP', 'NOT REGEXP'
|
|
))) throw new Error('Invalid predicate/operator ' . $predicate);
|
|
|
|
$valueBinding = sql::generateBindingName('value');
|
|
$bindings[$valueBinding] = $args[2];
|
|
|
|
$result = $key . ' ' . $predicate . ' ' . $valueBinding;
|
|
|
|
$this->bindings($bindings);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
// attach the where clause
|
|
if(!empty($current)) {
|
|
return $current . ' ' . $mode . ' ' . $result;
|
|
} else {
|
|
return $result;
|
|
}
|
|
|
|
}
|
|
|
|
}
|