1 <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed.'); 
  2 
  3 /**
  4  * Contains current user's methods.
  5  */
  6 class User_Model extends CI_Model {
  7     /**
  8      * Class Constructor
  9      */
 10     public function __construct() {
 11         parent::__construct();
 12     }
 13     
 14     /**
 15      * Returns the user settings from the database.
 16      * 
 17      * @param numeric $user_id User record id of which the settings will be returned.
 18      * @return array Returns an array with user settings.
 19      */
 20     public function get_settings($user_id) {
 21         $user = $this->db->get_where('ea_users', array('id' => $user_id))->row_array();
 22         $user['settings'] = $this->db->get_where('ea_user_settings', array('id_users' => $user_id))->row_array();
 23         unset($user['settings']['id_users']);
 24         return $user;
 25     }
 26     
 27     /**
 28      * This method saves the user settings into the database.
 29      * 
 30      * @param array $user Contains the current users settings.
 31      * @return bool Returns the operation result.
 32      */
 33     public function save_settings($user) {
 34         $user_settings = $user['settings'];
 35         $user_settings['id_users'] = $user['id'];
 36         unset($user['settings']);
 37         
 38         // Prepare user password (hash).
 39         if (isset($user_settings['password'])) {
 40             $this->load->helper('general');
 41             $salt = $this->db->get_where('ea_user_settings', array('id_users' => $user['id']))->row()->salt;
 42             $user_settings['password'] = hash_password($salt, $user_settings['password']);
 43         }
 44         
 45         if (!$this->db->update('ea_users', $user, array('id' => $user['id']))) {
 46             return FALSE;
 47         }
 48         
 49         if (!$this->db->update('ea_user_settings', $user_settings, array('id_users' => $user['id']))) {
 50             return FALSE;
 51         }
 52         
 53         return TRUE;
 54     }
 55     
 56     /**
 57      * Retrieve user's salt from database.
 58      * 
 59      * @param string $username This will be used to find the user record.
 60      * @return string Returns the salt db value.
 61      */
 62     public function get_salt($username) {
 63         $user =  $this->db->get_where('ea_user_settings', array('username' => $username))->row_array();
 64         return ($user) ? $user['salt'] : '';
 65     }
 66     
 67     /**
 68      * Performs the check of the given user credentials. 
 69      * 
 70      * @param string $username Given user's name. 
 71      * @param type $password Given user's password (not hashed yet).
 72      * @return array|null Returns the session data of the logged in user or null on 
 73      * failure.
 74      */
 75     public function check_login($username, $password) {
 76         $this->load->helper('general');
 77         $salt = $this->user_model->get_salt($username);
 78         $password = hash_password($salt, $password);
 79         
 80         $user_data = $this->db
 81                 ->select('ea_users.id AS user_id, ea_users.email AS user_email, '
 82                         . 'ea_roles.slug AS role_slug, ea_user_settings.username')
 83                 ->from('ea_users')
 84                 ->join('ea_roles', 'ea_roles.id = ea_users.id_roles', 'inner')
 85                 ->join('ea_user_settings', 'ea_user_settings.id_users = ea_users.id')
 86                 ->where('ea_user_settings.username', $username)
 87                 ->where('ea_user_settings.password', $password)
 88                 ->get()->row_array();
 89         
 90         return ($user_data) ? $user_data : NULL;
 91     }
 92     
 93     /**
 94      * Get the given user's display name (first + last name).
 95      * 
 96      * @param numeric $user_id The given user record id.
 97      * @return string Returns the user display name.
 98      */
 99     public function get_user_display_name($user_id) {
100         if (!is_numeric($user_id))
101             throw new Exception ('Invalid argument given ($user_id = "' . $user_id . '").');
102         $user = $this->db->get_where('ea_users', array('id' => $user_id))->row_array();
103         return $user['first_name'] . ' ' . $user['last_name'];
104     }
105     
106     /**
107      * If the given arguments correspond to an existing user record, generate a new 
108      * password and send it with an email.
109      * 
110      * @param string $username
111      * @param string $email
112      * @return string|bool Returns the new password on success or FALSE on failure.
113      */
114     public function regenerate_password($username, $email) {
115         $this->load->helper('general');
116         
117         $result = $this->db
118                 ->select('ea_users.id')
119                 ->from('ea_users')
120                 ->join('ea_user_settings', 'ea_user_settings.id_users = ea_users.id', 'inner')
121                 ->where('ea_users.email', $email)
122                 ->where('ea_user_settings.username', $username)
123                 ->get();
124         
125         if ($result->num_rows() == 0) return FALSE;
126         
127         $user_id = $result->row()->id;
128         
129         // Create a new password and send it with an email to the given email address.
130         $new_password = generate_random_string();
131         $salt = $this->db->get_where('ea_user_settings', array('id_users' => $user_id))->row()->salt;
132         $hash_password = hash_password($salt, $new_password);
133         $this->db->update('ea_user_settings', array('password' => $hash_password), array('id_users' => $user_id));
134         
135         return $new_password;
136     }
137 }
138 
139 /* End of file user_model.php */
140 /* Location: ./application/models/user_model.php */

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