model_auth.php

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<?php
class ModelAuth implements AuthInterface
{

    private $filename;
    private $server;
    private $username;
    private $password;
    private $compare_attributes = array();
    private $identity = array();

    public function __construct($auth, $extra_args)
    {
        foreach (array('class') as $param) {
            if (isset($extra_args[$param])) {
                $this->$param = $extra_args[$param];
            } else {
                throw new KumbiaException("Debe especificar el parámetro '$param' en los parámetros");
            }
        }
        unset($extra_args[0]);
        unset($extra_args['class']);
        $this->compare_attributes = $extra_args;
    }

    public function get_identity()
    {
        return $this->identity;
    }

    public function authenticate()
    {
        $where_condition = array();
        foreach ($this->compare_attributes as $field => $value) {
            $value = addslashes($value);
            $where_condition[] = "$field = '$value'";
        }
        $result = Load::model($this->class)->count(join(" AND ", $where_condition));
        if ($result) {
            $model = KumbiaActiveRecord::get($this->class)->find_first(join(" AND ", $where_condition));
            $identity = array();
            foreach ($model->fields as $field) {
                if (!in_array($field, array('password', 'clave', 'contrasena', 'passwd', 'pass'))) {
                    $identity[$field] = $model->$field;
                }
            }
            $this->identity = $identity;
        }
        return $result;
    }

    public function set_params($extra_args)
    {
        foreach (array('server', 'secret', 'principal', 'password', 'port', 'max_retries') as $param) {
            if (isset($extra_args[$param])) {
                $this->$param = $extra_args[$param];
            }
        }
    }

}