FuelPHP Create/Edit Users

User.php
--------

<?php

class User extends Admin_Controller
{

    public function __construct()
    {
        parent::__construct();
    }


    public function index()
    {
        // Fetch all users
        $this->data['users'] = $this->user_m->get();
        // Load view
        $this->data['subview'] = 'admin/user/index';
        $this->load->view( 'admin/_layout_main', $this->data );
    }


    public function edit( $id = null )
    {
        // Fetch a user or set a new one
        if( $id )
        {
            $this->data['user'] = $this->user_m->get( $id );
            count( $this->data['user'] ) || $this->data['errors'][] = 'User could not be found';
        }
        else
        {
            $this->data['user'] = $this->user_m->get_new();
        }

        // Set up the form
        $rules = $this->user_m->rules_admin;
        $id || $rules['password']['rules'] .= '|required';
        $this->form_validation->set_rules( $rules );

        // Process the form
        if( $this->form_validation->run() == TRUE )
        {
            $data = $this->user_m->array_from_post( array( 'name', 'email', 'password' ) );
            $data['password'] = $this->user_m->hash( $data['password'] );
            $this->user_m->save( $data, $id );
            redirect( 'admin/user' );
        }

        // Load the view
        $this->data['subview'] = 'admin/user/edit';
        $this->load->view( 'admin/_layout_main', $this->data );
    }


    public function delete( $id )
    {
        $this->user_m->delete( $id );
        redirect( 'admin/user' );
    }


    public function login()
    {
        // Redirect the user if he's already logged in
        $this->user_m->loggedin() == FALSE || redirect( 'admin/dashboard' );

        // Set up form
        $rules = $this->user_m->rules;
        $this->form_validation->set_rules( $rules );

        // Process form
        if( $this->form_validation->run() )
        {
            // Login and redirect
            if( $this->user_m->login() == TRUE )
            {
                redirect( 'admin/dashboard' );
            }
            else
            {
                $this->session->set_flashdata( 'error', 'That email/password combination does not exist' );
                redirect( 'admin/user/login', 'refresh' );
            }
        }

        // Load view
        $this->data['subview'] = 'admin/user/login';
        $this->load->view( 'admin/_layout_modal', $this->data );
    }


    public function logout()
    {
        $this->user_m->logout();
        redirect( 'admin/user/login' );
    }


    public function _unique_email( $str )
    {
        // Do NOT validate if email aready exists unless it belongs to current user
        $id = $this->uri->segment( 4 );
        $this->db->where( 'email', $this->input->post( 'email' ) );
        // set where condition if there is an id
        !$id || $this->db->where( 'id !=', $id );
        $user = $this->user_m->get();

        if( count( $user ) )
        {
            $this->form_validation->set_message( '_unique_email', '%s should be unique' );
            return FALSE;
        }

        return TRUE;
    }

}



user_m.php
----------

<?php

class User_M extends MY_Model
{

    protected $_table_name = 'users';
    protected $_order_by = 'name';

    public $rules = array(
        'email' => array(
            'field' => 'email',
            'label' => 'Email',
            'rules' => 'trim|required|valid_email|xss_clean'
        ),
        'password' => array(
            'field' => 'password',
            'lable' => 'Password',
            'rules' => 'trim|required'
        )
    );

    public $rules_admin = array(
        'name' => array(
            'field' => 'name',
            'label' => 'Name',
            'rules' => 'trim|required|xss_clean'
        ),
        'email' => array(
            'field' => 'email',
            'label' => 'Email',
            'rules' => 'trim|required|valid_email|callback__unique_email|xss_clean'
        ),
        'password' => array(
            'field' => 'password',
            'lable' => 'Password',
            'rules' => 'trim|matches[password_confirm]'
        ),
        'password_confirm' => array(
            'field' => 'password_confirm',
            'lable' => 'Confirm Password',
            'rules' => 'trim|matches[password]'
        )
    );


    function __construct()
    {
        parent::__construct();
    }


    public function login()
    {
        $user = $this->get_by( array(
            'email' => $this->input->post( 'email' ),
            'password' => $this->hash( $this->input->post( 'password' ) )
        ), TRUE );

        if( count( $user ) )
        {
            $data = array(
                'name' => $user->name,
                'email' => $user->email,
                'id' => $user->id,
                'loggedin' => TRUE
            );

            $this->session->set_userdata( $data );
        }
    }


    public function logout()
    {
        $this->session->sess_destroy();
    }


    public function loggedin()
    {
        return (bool) $this->session->userdata( 'loggedin' );
    }


    public function get_new()
    {
        $user = new stdClass();
        $user->name = '';
        $user->email = '';
        $user->password = '';
        return $user;
    }


    public function hash( $string )
    {
        return hash( 'sha512', $string . config_item( 'encryption_key' ) );
    }

}



MY_Model.php
------------

<?php

class MY_Model extends CI_Model
{

    protected $_table_name = '';
    protected $_primary_key = 'id';
    protected $_primary_filter = 'intval';
    protected $_order_by = '';
    public $rules = array();
    protected $_timestamps = FALSE;


    function __construct()
    {
        parent::__construct();
    }


    public function array_from_post( $fields )
    {
        $data = array();
        foreach( $fields as $field )
        {
            $data[$field] = $this->input->post( $field );
        }
        return $data;
    }


    public function get( $id = null, $single = FALSE )
    {
        if( $id != null )
        {
            $filter = $this->_primary_filter;
            $id = $filter( $id );
            $this->db->where( $this->_primary_key, $id );
            $method = 'row';
        }
        elseif( $single == TRUE )
        {
            $method = 'row';
        }
        else
        {
            $method = 'result';
        }

        if( ! count( $this->db->ar_orderby ) )
        {
            $this->db->order_by( $this->_order_by );
        }

        return $this->db->get( $this->_table_name )->$method();
    }


    public function get_by( $where, $single = FALSE )
    {
        $this->db->where( $where );
        return $this->get( null, $single );
    }


    public function save( $data, $id = null )
    {
        // Set timestamps
        if( $this->_timestamps == TRUE )
        {
            $now = date( 'Y-m-d H:i:s' );
            $id || $data['created'] = $now;
            $data['modified'] = $now;
        }

        // Insert
        if( $id === null )
        {
            // set it to null if it is set
            ! isset( $data[$this->_primary_key] ) || $data[$this->_primary_key] = null;
            $this->db->set( $data );
            $this->db->insert( $this->_table_name );
            $id = $this->db->insert_id();
        }
        // Update
        else
        {
            $filter = $this->_primary_filter;
            $id = $filter( $id );
            $this->db->set( $data );
            $this->db->where( $this->_primary_key, $id );
            $this->db->update( $this->_table_name );
        }

        return $id;
    }


    public function delete( $id )
    {
        $filter = $this->_primary_filter;
        $id = $filter( $id );

        if( ! $id )
        {
            return FALSE;
        }
        else
        {
            $this->db->where( $this->_primary_key, $id );
            $this->db->limit( 1 );
            $this->db->delete( $this->_table_name );
        }
    }

}