480 lines
18 KiB
PHP
480 lines
18 KiB
PHP
<?php
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namespace descartes;
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/**
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* Cette classe sert de mère à tous les modèles, elle permet de gérer l'ensemble des fonction necessaires aux requetes en base de données
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* @param $pdo : Une instance de \PDO
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*/
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class Model
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{
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//Les variables internes au Model
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var $pdo;
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//Les constantes des différents types de retours possibles
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const NO = 0; //Pas de retour
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const FETCH = 1; //Retour de type fetch
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const FETCHALL = 2; //Retour de type fetchall
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const ROWCOUNT = 3; //Retour de type rowCount()
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/**
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* Model constructor
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* @param \PDO $pdo : \PDO connect to use
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*/
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public function __construct(\PDO $pdo)
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{
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$this->pdo = $pdo;
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}
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/**
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* Cette fonction permet créer une connexion à une base SQL via \PDO
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* @param string $host : L'host à contacter
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* @param string $dbname : Le nom de la base à contacter
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* @param string $user : L'utilisateur à utiliser
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* @param string $password : Le mot de passe à employer
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* @return mixed : Un objet \PDO ou false en cas d'erreur
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*/
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public static function _connect ($host, $dbname, $user, $password, ?string $charset = 'UTF8', ?array $options = null)
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{
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$options = $options ?? [
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\PDO::ATTR_DEFAULT_FETCH_MODE => \PDO::FETCH_ASSOC,
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\PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION
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];
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// On se connecte à MySQL
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$pdo = new \PDO('mysql:host=' . $host . ';dbname=' . $dbname . ';charset=' . $charset , $user, $password, $options);
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if ($pdo === false)
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{
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throw new DescartesExceptionDatabaseConnection('Cannot connect to database ' . $dbname . '.');
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}
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return $pdo;
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}
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/**
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* Run a query and return result
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* @param string $query : Query to run
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* @param array $datas : Datas to pass to query
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* @param const $return_type : Type of return, by default all results, see Model constants
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* @param const $fetch_mode : Format of result from db, by default array, FETCH_ASSOC
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* @param boolean $debug : If we must return debug info instead of data, by default false
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* @return mixed : Result of query, depend of $return_type | null | array | object | int
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*/
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protected function _run_query (string $query, array $datas = array(), int $return_type = self::FETCHALL, int $fetch_mode = \PDO::FETCH_ASSOC, bool $debug = false)
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{
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try
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{
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//Must convert bool to 1 or 0 because of some strange inconsistent behavior between PHP versions
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foreach ($datas as $key => $value)
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{
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if (is_bool($value))
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{
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$datas[$key] = (int) $value;
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}
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}
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$query = $this->pdo->prepare($query);
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$query->setFetchMode($return_type);
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$query->execute($datas);
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if ($debug)
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{
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return $query->errorInfo();
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}
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switch ($return_type)
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{
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case self::NO :
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$return = NULL;
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break;
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case self::FETCH :
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$return = $query->fetch();
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break;
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case self::FETCHALL :
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$return = $query->fetchAll();
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break;
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case self::ROWCOUNT :
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$return = $query->rowCount();
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break;
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default :
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$return = $query->fetchAll();
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}
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return $return;
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}
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catch (\PDOException $e)
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{
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$error = $query->errorInfo();
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//Get query string and params
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ob_start();
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$query->debugDumpParams();
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$debug_string = ob_get_clean();
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throw new \descartes\exceptions\DescartesExceptionSqlError(
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'SQL Error : ' . "\n" .
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'SQLSTATE : ' . $error[0] . "\n" .
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'Driver Error Code : ' . $error[1] . "\n" .
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'Driver Error Message : ' . $error[2] . "\n" .
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'SQL QUERY DEBUG :' . "\n" .
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'-----------------' . "\n" .
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$debug_string . "\n" .
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'-----------------' . "\n"
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);
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}
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}
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/**
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* Return last inserted id
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* return int : Last inserted id
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*/
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protected function _last_id() : int
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{
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return $this->pdo->lastInsertId();
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}
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/*
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Fonctions d'execution des requetes ou de génération
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*/
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/**
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* Generate IN query params and values
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* @param string $values : Values to generate in array from
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* @return array : Array ['QUERY' => string 'IN(...)', 'PARAMS' => [parameters to pass to execute]]
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*/
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protected function _generate_in_from_array ($values)
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{
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$return = array(
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'QUERY' => '',
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'PARAMS' => array(),
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);
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$flags = array();
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$values = count($values) ? $values : array();
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foreach ($values as $key => $value)
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{
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$key = preg_replace('#[^a-zA-Z0-9_]#', '', $key);
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$return['PARAMS']['in_value_' . $key] = $value;
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$flags[] = ':in_value_' . $key;
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}
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$return['QUERY'] .= ' IN(' . implode(', ', $flags) . ')';
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return $return;
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}
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/**
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* Evaluate a condition to generate query string and params array for
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* @param string $fieldname : fieldname possibly preceed by '<, >, <=, >=, ! or ='
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* @param $value : value of field
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* @return array : array with QUERY and PARAMS
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*/
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protected function _evaluate_condition (string $fieldname, $value) : array
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{
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$first_char = mb_substr($fieldname, 0, 1);
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$second_char = mb_substr($fieldname, 1, 1);
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switch(true)
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{
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//Important de traiter <= & >= avant < & >
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case ('<=' == $first_char . $second_char) :
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$true_fieldname = mb_substr($fieldname, 2);
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$operator = '<=';
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break;
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case ('>=' == $first_char . $second_char) :
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$true_fieldname = mb_substr($fieldname, 2);
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$operator = '>=';
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break;
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case ('!=' == $first_char . $second_char) :
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$true_fieldname = mb_substr($fieldname, 2);
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$operator = '!=';
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break;
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case ('!' == $first_char) :
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$true_fieldname = mb_substr($fieldname, 1);
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$operator = '!=';
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break;
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case ('<' == $first_char) :
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$true_fieldname = mb_substr($fieldname, 1);
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$operator = '<';
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break;
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case ('>' == $first_char) :
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$true_fieldname = mb_substr($fieldname, 1);
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$operator = '>';
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break;
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case ('=' == $first_char) :
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$true_fieldname = mb_substr($fieldname, 1);
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$operator = '=';
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break;
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default :
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$true_fieldname = $fieldname;
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$operator = '=';
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}
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//Protect against injection in fieldname
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$true_fieldname = preg_replace('#[^a-zA-Z0-9_]#', '', $true_fieldname);
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$query = '`' . $true_fieldname . '` ' . $operator . ' :where_' . $true_fieldname;
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$param = ['where_' . $true_fieldname => $value];
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return ['QUERY' => $query, 'PARAM' => $param];
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}
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/**
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* Get from table, posssibly with some conditions
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* @param string $table : table name
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* @param array $conditions : Where conditions to use, format 'fieldname' => 'value', fieldname can be preceed by operator '<, >, <=, >=, ! or = (by default)' to adapt comparaison operator
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* @param ?string $order_by : name of column to order result by, null by default
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* @param string $desc : L'ordre de tri (asc ou desc). Si non défini, ordre par défaut (ASC)
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* @param string $limit : Le nombre maximum de résultats à récupérer (par défaut pas le limite)
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* @param string $offset : Le nombre de résultats à ignorer (par défaut pas de résultats ignorés)
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* @return mixed : False en cas d'erreur, sinon les lignes retournées
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*/
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protected function _select (string $table, array $conditions = [], ?string $order_by = null, bool $desc = false, ?int $limit = null, ?int $offset = null)
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{
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try
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{
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$wheres = array();
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$params = array();
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foreach ($conditions as $label => $value)
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{
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$condition = $this->_evaluate_condition($label, $value);
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$wheres[] = $condition['QUERY'];
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$params = array_merge($params, $condition['PARAM']);
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}
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$query = "SELECT * FROM `" . $table . "` WHERE 1 " . (count($wheres) ? 'AND ' : '') . implode(' AND ', $wheres);
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if ($order_by !== null)
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{
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$query .= ' ORDER BY ' . $order_by;
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if ($desc)
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{
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$query .= ' DESC';
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}
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}
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if ($limit !== null)
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{
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$query .= ' LIMIT :limit';
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if ($offset !== null)
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{
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$query .= ' OFFSET :offset';
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}
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}
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$query = $this->pdo->prepare($query);
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if ($limit !== null)
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{
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$query->bindParam(':limit', $limit, \PDO::PARAM_INT);
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if ($offset !== null)
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{
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$query->bindParam(':offset', $offset, \PDO::PARAM_INT);
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}
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}
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foreach ($params as $label => &$param)
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{
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$query->bindParam(':' . $label, $param);
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}
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$query->setFetchMode(\PDO::FETCH_ASSOC);
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$query->execute();
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return $query->fetchAll();
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}
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catch (\PDOException $e)
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{
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$error = $query->errorInfo();
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//Get query string and params
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ob_start();
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$query->debugDumpParams();
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$debug_string = ob_get_clean();
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throw new \descartes\exceptions\DescartesExceptionSqlError(
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'SQL Error : ' . "\n" .
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'SQLSTATE : ' . $error[0] . "\n" .
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'Driver Error Code : ' . $error[1] . "\n" .
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'Driver Error Message : ' . $error[2] . "\n" .
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'SQL QUERY DEBUG :' . "\n" .
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'-----------------' . "\n" .
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$debug_string . "\n" .
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'-----------------' . "\n"
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);
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}
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}
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/**
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* Get one line from table, posssibly with some conditions
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* see get
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*/
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protected function _select_one (string $table, array $conditions = [], ?string $order_by = null, bool $desc = false, ?int $limit = null, ?int $offset = null)
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{
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$result = $this->_select($table, $conditions, $order_by, $desc, $limit, $offset);
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if (empty($result[0]))
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{
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return $result;
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}
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return $result[0];
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}
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/**
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* Count line from table, posssibly with some conditions
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* @param array $conditions : conditions of query Les conditions pour la mise à jour sous la forme "label" => "valeur". Un operateur '<, >, <=, >=, !' peux précder le label pour modifier l'opérateur par défaut (=)
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*/
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protected function _count (string $table, array $conditions = []) : int
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{
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try
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{
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$wheres = array();
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$params = array();
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foreach ($conditions as $label => $value)
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{
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$condition = $this->_evaluate_condition($label, $value);
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$wheres[] = $condition['QUERY'];
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$params = array_merge($params, $condition['PARAM']);
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}
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$query = "SELECT COUNT(*) as `count` FROM `" . $table . "` WHERE 1 " . (count($wheres) ? 'AND ' : '') . implode(' AND ', $wheres);
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$query = $this->pdo->prepare($query);
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foreach ($params as $label => &$param)
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{
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$query->bindParam(':' . $label, $param);
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}
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$query->setFetchMode(\PDO::FETCH_ASSOC);
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$query->execute();
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return $query->fetch()['count'];
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}
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catch (\PDOException $e)
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{
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$error = $query->errorInfo();
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//Get query string and params
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ob_start();
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$query->debugDumpParams();
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$debug_string = ob_get_clean();
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throw new \descartes\exceptions\DescartesExceptionSqlError(
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'SQL Error : ' . "\n" .
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'SQLSTATE : ' . $error[0] . "\n" .
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'Driver Error Code : ' . $error[1] . "\n" .
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'Driver Error Message : ' . $error[2] . "\n" .
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'SQL QUERY DEBUG :' . "\n" .
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'-----------------' . "\n" .
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$debug_string . "\n" .
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'-----------------' . "\n"
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);
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}
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}
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/**
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* Update data from table with some conditions
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* @param string $table : table name
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* @param array $datas : new data to set
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* @param array $conditions : conditions of update, Les conditions pour la mise à jour sous la forme "label" => "valeur". Un operateur '<, >, <=, >=, !' peux précder le label pour modifier l'opérateur par défaut (=)
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* @param array $conditions : conditions to use, format 'fieldname' => 'value', fieldname can be preceed by operator '<, >, <=, >=, ! or = (by default)' to adapt comparaison operator
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* @return mixed : Number of line modified
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*/
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protected function _update (string $table, array $datas, array $conditions = array()) : int
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{
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$params = array();
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$sets = array();
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foreach ($datas as $label => $value)
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{
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$label = preg_replace('#[^a-zA-Z0-9_]#', '', $label);
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$params['set_' . $label] = $value;
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$sets[] = '`' . $label . '` = :set_' . $label . ' ';
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}
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$wheres = array();
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foreach ($conditions as $label => $value)
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{
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$condition = $this->_evaluate_condition($label, $value);
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$wheres[] = $condition['QUERY'];
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$params = array_merge($params, $condition['PARAM']);
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}
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$query = "UPDATE `" . $table . "` SET " . implode(', ', $sets) . " WHERE 1 " . (count($wheres) ? " AND " : "") . implode(' AND ', $wheres);
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return $this->_run_query($query, $params, self::ROWCOUNT);
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}
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/**
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* Delete from table according to certain conditions
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* @param string $table : Table name
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* @param array $conditions : conditions to use, format 'fieldname' => 'value', fieldname can be preceed by operator '<, >, <=, >=, ! or = (by default)' to adapt comparaison operator
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* @return mixed : Number of line deleted
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*/
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protected function _delete (string $table, array $conditions = []) : int
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{
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//On gère les conditions
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$wheres = array();
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$params = array();
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foreach ($conditions as $label => $value)
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{
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$condition = $this->_evaluate_condition($label, $value);
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$wheres[] = $condition['QUERY'];
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$params = array_merge($params, $condition['PARAM']);
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}
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$query = "DELETE FROM `" . $table . "` WHERE 1 " . (count($wheres) ? " AND " : "") . implode(' AND ', $wheres);
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return $this->_run_query($query, $params, self::ROWCOUNT);
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}
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/**
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* Insert new line into table
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* @param string $table : table name
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* @param array $datas : new datas
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* @return mixed : null on error, number of line inserted else
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*/
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protected function _insert (string $table, array $datas) : ?int
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{
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$params = array();
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$field_names = array();
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foreach ($datas as $field_name => $value)
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{
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//Protect against injection in fieldname
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$field_name = preg_replace('#[^a-zA-Z0-9_]#', '', $field_name);
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$params[$field_name] = $value;
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$field_names[] = $field_name;
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}
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$query = "INSERT INTO `" . $table . "` (`" . implode('`, `', $field_names) . "`) VALUES(:" . implode(', :', $field_names) . ")";
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//On retourne le nombre de lignes insérées
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return $this->_run_query($query, $params, self::ROWCOUNT);
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}
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}
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