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370
src/Libs/ModelMySQL.php
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370
src/Libs/ModelMySQL.php
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<?php
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namespace Libs;
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use Libs\Database;
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class ModelMySQL {
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public $id;
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protected $primaryKey = 'id';
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protected $ignoreSave = ['id'];
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protected $forceSave = [];
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static protected $table;
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static protected $tableSufix = 's';
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static protected $db;
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static protected $querySelect = [
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'select' => '*',
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'where' => '',
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'AndOr' => '',
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'orderBy'=>'',
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'groupBy'=>'',
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'limit' => '',
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];
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private static function db(){
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if (is_null(self::$db))
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self::$db = Database::getConnection();
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return self::$db;
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}
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private static function query($query){
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$db = self::db();
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$result = $db->query($query);
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if ($db->errno){
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echo 'Fallo al consultar la base de datos.<br>
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Errno: ' . addslashes ($db->errno).'<br>
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Error: ' . addslashes ($db->error).'<br>'.$query;
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exit();
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}
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return $result;
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}
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private static function resetQuery(){
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self::$querySelect = [
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'select' => '*',
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'where' => '',
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'AndOr' => '',
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'orderBy'=>'',
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'groupBy'=>'',
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'limit' => '',
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];
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}
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private static function buildQuery(){
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$sql = 'SELECT '.self::$querySelect['select'].' FROM '.self::table();
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if (self::$querySelect['where'] != ''){
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$sql .= ' WHERE '.self::$querySelect['where'];
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if (self::$querySelect['AndOr'] != ''){
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$sql .= self::$querySelect['AndOr'];
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}
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}
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if (self::$querySelect['groupBy'] != ''){
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$sql .= ' GROUP BY '.self::$querySelect['groupBy'];
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}
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if (self::$querySelect['orderBy'] != ''){
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$sql .= ' ORDER BY '.self::$querySelect['orderBy'];
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}
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if (self::$querySelect['limit'] != ''){
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$sql .= ' LIMIT '.self::$querySelect['limit'];
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}
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self::resetQuery();
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return $sql;
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}
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public function getInstance($elem = []){
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$class = get_called_class();
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$instace = new $class;
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foreach ($elem as $key => $value){
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$instace->$key = $value;
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}
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return $instace;
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}
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private function getVars(){ // Source: https://stackoverflow.com/questions/10009015/show-all-public-attributes-name-and-value-of-an-object
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$get_vars_proxy = create_function('$obj', 'return get_object_vars($obj);');
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$result = $get_vars_proxy($this);
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foreach ($this->ignoreSave as $del){
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unset($result[$del]);
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}
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foreach ($this->forceSave as $value){
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$result[$value] = $this->$value;
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}
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return $result;
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}
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public static function className(){
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return strtolower(substr(strrchr(get_called_class(), '\\'), 1));
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}
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private static function table(){
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if (isset(self::$table))
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return self::$table;
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return self::className().self::$tableSufix;
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}
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private function update(){
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$atts = $this->getVars();
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foreach ($atts as $key => $value){
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$value = self::db()->real_escape_string($value);
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$set[]="$key='$value'";
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}
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$table = self::table();
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$pk = $this->primaryKey;
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$pkv = $this->$pk;
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$sql = "UPDATE $table SET ".join(', ', $set)." WHERE $pk='$pkv'";
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self::query($sql);
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}
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private function add(){
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$db = self::db();
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$atts = $this->getVars();
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foreach ($atts as $key => $value){
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$into[] = "`$key`";
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$values[] = "'".$db->real_escape_string($value)."'";
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}
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$table = self::table();
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$sql = "INSERT INTO $table (".join(', ', $into).") VALUES (".join(', ', $values).")";
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self::query($sql);
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$pk = $this->primaryKey;
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$this->$pk = $db->insert_id;
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}
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public function save(){
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$pk = $this->primaryKey;
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if (isset($this->$pk))
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$this->update();
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else
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$this->add();
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}
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public function delete(){
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$atts = $this->getVars();
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foreach ($atts as $key => $value){
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$value = self::db()->real_escape_string($value);
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$set[]="$key='$value'";
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}
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$table = self::table();
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$pk = $this->primaryKey;
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$pkv = $this->$pk;
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$sql = "DELETE FROM $table WHERE $pk='$pkv'";
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self::query($sql);
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}
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public static function select($value){
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$db = self::db();
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$select = [];
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foreach($value as $elem){
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$select[] = $db->real_escape_string($elem);
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}
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self::$querySelect['select'] = join(', ', $select);
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return new static();
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}
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/*
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* Sintaxis permitidas:
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* - Class::where(columna, operador, valor)
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* - Class::where(columna, valor) // Operador por defecto "="
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*/
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public static function where($column, $operator, $value=null){
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if (is_null($value)){
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$value = $operator;
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$operator = '=';
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}
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$value = self::db()->real_escape_string($value);
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self::$querySelect['where'] = "$column$operator'$value'";
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return new static();
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}
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public static function where_in($column,$arr, $in = true){
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foreach($arr as $index => $value){
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$arr[$index] = self::db()->real_escape_string($value);
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}
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if ($in)
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self::$querySelect['where'] = "$column IN (".join(', ',$arr).")";
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else
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self::$querySelect['where'] = "$column NOT IN (".join(', ',$arr).")";
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return new static();
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}
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public static function and($column, $operator, $value=null){
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if (is_null($value)){
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$value = $operator;
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$operator = '=';
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}
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$value = self::db()->real_escape_string($value);
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self::$querySelect['AndOr'] = " AND $column$operator'$value'";
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return new static();
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}
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public static function or($column, $operator, $value=null){
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if (is_null($value)){
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$value = $operator;
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$operator = '=';
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}
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$value = self::db()->real_escape_string($value);
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self::$querySelect['AndOr'] = " OR $column$operator'$value'";
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return new static();
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}
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public static function groupBy($arr){
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self::$querySelect['groupBy'] = join(', ', $arr);
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return new static();
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}
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public static function limit($initial, $final = 0){
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$initial = (int)$initial;
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$final = (int)$final;
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if ($final==0)
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self::$querySelect['limit'] = $initial;
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else
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self::$querySelect['limit'] = $initial.', '.$final;
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return new static();
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}
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public static function orderBy($value, $order = 'ASC'){
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if ($value == "RAND"){
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self::$querySelect['orderBy'] = 'RAND()';
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return new static();
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}
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$value = self::db()->real_escape_string($value);
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if (!(strtoupper($order) == 'ASC' || strtoupper($order) == 'DESC'))
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$order = 'ASC';
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self::$querySelect['orderBy'] = $value.' '.$order;
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return new static();
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}
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public static function count(){
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self::$querySelect['select'] = 'count(*) as quantity';
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$sql = self::buildQuery();
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$result = self::query($sql)->fetch_assoc();
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return $result['quantity'];
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}
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public static function getById($id){
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return self::where('id', $id)->getFirst();
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}
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public static function search($search, $in = null){
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$className = get_called_class();
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$objAtts = array_keys((new $className())->getVars());
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if ($in == null){
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$in = $objAtts;
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}
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$db = self::db();
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$search = $db->real_escape_string($search);
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$where = [];
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foreach($in as $row){
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if(in_array($row, $objAtts))
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$where[] = "$row LIKE '%$search%'";
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}
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if (self::$querySelect['where']=='')
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self::$querySelect['where'] = join($where, ' OR ');
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else
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self::$querySelect['where'] = self::$querySelect['where'] .' AND ('.join($where, ' OR ').')';
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return new static();
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}
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public static function get(){ // Devuelve array vacío si no encuentra nada
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$sql = self::buildQuery();
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$result = self::query($sql);
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$instaces = [];
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while ($row = $result->fetch_assoc()){
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$instaces[] = self::getInstance($row);
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}
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return $instaces;
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}
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public static function getFirst(){ // Devuelve null si no encuentra nada
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self::limit(1);
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$instaces = self::get();
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return empty($instaces) ? null : $instaces[0];
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}
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public static function all(){
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$sql = 'SELECT * FROM '.self::table();
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$result = self::query($sql);
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$instaces = [];
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while ($row = $result->fetch_assoc()){
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$instaces[] = self::getInstance($row);
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}
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return $instaces;
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}
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}
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?>
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