easyappointments/src/application/models/admins_model.php

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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed.');
/**
* Admins_Model Class
*
* Handles the database actions for admin users management.
*
* Data Structure:
* 'fist_name'
* 'last_name' (required)
* 'email' (required)
* 'mobile_number'
* 'phone_number' (required)
* 'address'
* 'city'
* 'state'
* 'zip_code'
* 'notes'
* 'id_roles'
* 'settings' >>> array that contains user settings (username, password etc)
*/
class Admins_Model extends CI_Model {
/**
* Class Constructor
*/
public function __construct() {
parent::__construct();
}
/**
* Add (insert or update) an admin user record into database.
*
* @param array $admin Contains the admin user data.
* @return int Returns the record id.
* @throws Exception When the admin data are invalid (see validate() method).
*/
public function add($admin) {
$this->validate($admin);
if ($this->exists($admin) && !isset($admin['id'])) {
$admin['id'] = $this->find_record_id($admin);
}
if (!isset($admin['id'])) {
$admin['id'] = $this->insert($admin);
} else {
$admin['id'] = $this->update($admin);
}
return intval($admin['id']);
}
/**
* Check whether a particular admin record exists in the database.
*
* @param array $admin Contains the admin data. The 'email' value is required to be present
* at the moment.
* @return bool Returns whether the record exists or not.
* @throws Exception When the 'email' value is not present on the $admin argument.
*/
public function exists($admin) {
if (!isset($admin['email'])) {
throw new Exception('Admin email is not provided: ' . print_r($admin, TRUE));
}
// This method shouldn't depend on another method of this class.
$num_rows = $this->db
->select('*')
->from('ea_users')
->join('ea_roles', 'ea_roles.id = ea_users.id_roles', 'inner')
->where('ea_users.email', $admin['email'])
->where('ea_roles.slug', DB_SLUG_ADMIN)
->get()->num_rows();
return ($num_rows > 0) ? TRUE : FALSE;
}
/**
* Insert a new admin record into the database.
*
* @param array $admin Contains the admin data.
* @return int Returns the new record id.
* @throws Exception When the insert operation fails.
*/
public function insert($admin) {
$this->load->helper('general');
$admin['id_roles'] = $this->get_admin_role_id();
$settings = $admin['settings'];
unset($admin['settings']);
$this->db->trans_begin();
if (!$this->db->insert('ea_users', $admin)) {
throw new Exception('Could not insert admin into the database.');
}
$admin['id'] = intval($this->db->insert_id());
$settings['id_users'] = $admin['id'];
$settings['salt'] = generate_salt();
$settings['password'] = hash_password($settings['salt'], $settings['password']);
// Insert admin settings.
if (!$this->db->insert('ea_user_settings', $settings)) {
$this->db->trans_rollback();
throw new Exception('Could not insert admin settings into the database.');
}
$this->db->trans_complete();
return $admin['id'];
}
/**
* Update an existing admin record in the database.
*
* @param array $admin Contains the admin record data.
* @return int Retuns the record id.
* @throws Exception When the update operation fails.
*/
public function update($admin) {
$this->load->helper('general');
$settings = $admin['settings'];
unset($admin['settings']);
$settings['id_users'] = $admin['id'];
if (isset($settings['password'])) {
$salt = $this->db->get_where('ea_user_settings', array('id_users' => $admin['id']))->row()->salt;
$settings['password'] = hash_password($salt, $settings['password']);
}
$this->db->where('id', $admin['id']);
if (!$this->db->update('ea_users', $admin)) {
throw new Exception('Could not update admin record.');
}
$this->db->where('id_users', $settings['id_users']);
if (!$this->db->update('ea_user_settings', $settings)) {
throw new Exception('Could not update admin settings.');
}
return intval($admin['id']);
}
/**
* Find the database record id of an admin user.
*
* @param array $admin Contains the admin data. The 'email' value is required in order to
* find the record id.
* @return int Returns the record id
* @throws Exception When the 'email' value is not present on the $admin array.
*/
public function find_record_id($admin) {
if (!isset($admin['email'])) {
throw new Exception('Admin email was not provided: ' . print_r($admin, TRUE));
}
$result = $this->db
->select('ea_users.id')
->from('ea_users')
->join('ea_roles', 'ea_roles.id = ea_users.id_roles', 'inner')
->where('ea_users.email', $admin['email'])
->where('ea_roles.slug', DB_SLUG_ADMIN)
->get();
if ($result->num_rows() == 0) {
throw new Exception('Could not find admin record id.');
}
return intval($result->row()->id);
}
/**
* Validate admin user data before add() operation is executed.
*
* @param array $admin Contains the admin user data.
* @return bool Returns the validation result.
*
* @throws Exception When data are invalid.
*/
public function validate($admin) {
$this->load->helper('data_validation');
// If a record id is provided then check whether the record exists in the database.
if (isset($admin['id'])) {
$num_rows = $this->db->get_where('ea_users', array('id' => $admin['id']))
->num_rows();
if ($num_rows == 0) {
throw new Exception('Given admin id does not exist in database: ' . $admin['id']);
}
}
// Validate required fields integrity.
if (!isset($admin['last_name'])
|| !isset($admin['email'])
|| !isset($admin['phone_number'])) {
throw new Exception('Not all required fields are provided : ' . print_r($admin, TRUE));
}
// Validate admin email address.
if (!filter_var($admin['email'], FILTER_VALIDATE_EMAIL)) {
throw new Exception('Invalid email address provided : ' . $admin['email']);
}
// Validate admin password
if (isset($admin['settings']['password'])) {
if (strlen($admin['settings']['password']) < MIN_PASSWORD_LENGTH) {
throw new Exception('The user password must be at least '
. MIN_PASSWORD_LENGTH . ' characters long.');
}
}
return TRUE; // Operation completed successfully.
}
/**
* Delete an existing admin record from the database.
*
* @param numeric $admin_id The admin record id to be deleted.
* @return bool Returns the delete operation result.
* @throws Exception When the $admin_id is not a valid numeric value.
* @throws Exception When the record to be deleted is the only one admin user left on
* the system.
*/
public function delete($admin_id) {
if (!is_numeric($admin_id)) {
throw new Exception('Invalid argument type $admin_id : ' . $admin_id);
}
// There must be always at least one admin user. If this is the only admin
// the system, it cannot be deleted.
$admin_count = $this->db->get_where('ea_users',
array('id_roles' => $this->get_admin_role_id()))->num_rows();
if ($admin_count == 1) {
throw new Exception('Record could not be deleted. The system requires at least '
. 'one admin user.');
}
$num_rows = $this->db->get_where('ea_users', array('id' => $admin_id))->num_rows();
if ($num_rows == 0) {
return FALSE; // Record does not exist in database.
}
return $this->db->delete('ea_users', array('id' => $admin_id));
}
/**
* Get a specific admin record from the database.
*
* @param numeric $admin_id The id of the record to be returned.
* @return array Returns an array with the admin user data.
* @throws Exception When the $admin_id is not a valid numeric value.
*/
public function get_row($admin_id) {
if (!is_numeric($admin_id)) {
throw new Exception('$admin_id argument is not a valid numeric value: ' . $admin_id);
}
// Check if record exists
if ($this->db->get_where('ea_users', array('id' => $admin_id))->num_rows() == 0) {
throw new Exception('The given admin id does not match a record in the database.');
}
$admin = $this->db->get_where('ea_users', array('id' => $admin_id))->row_array();
$admin['settings'] = $this->db->get_where('ea_user_settings',
array('id_users' => $admin_id))->row_array();
unset($admin['settings']['id_users']);
return $admin;
}
/**
* Get a specific field value from the database.
*
* @param string $field_name The field name of the value to be returned.
* @param numeric $admin_id Record id of the value to be returned.
* @return string Returns the selected record value from the database.
* @throws Exception When the $field_name argument is not a valid string.
* @throws Exception When the $admin_id is not a valid numeric.
* @throws Exception When the admin record does not exist in the database.
* @throws Exception When the selected field value is not present on database.
*/
public function get_value($field_name, $admin_id) {
if (!is_string($field_name)) {
throw new Exception('$field_name argument is not a string : ' . $field_name);
}
if (!is_numeric($admin_id)) {
throw new Exception('$admin_id argument is not a valid numeric value: ' . $admin_id);
}
// Check whether the admin record exists.
$result = $this->db->get_where('ea_users', array('id' => $admin_id));
if ($result->num_rows() == 0) {
throw new Exception('The record with the given id does not exist in the '
. 'database : ' . $admin_id);
}
// Check if the required field name exist in database.
$provider = $result->row_array();
if (!isset($provider[$field_name])) {
throw new Exception('The given $field_name argument does not exist in the '
. 'database: ' . $field_name);
}
return $provider[$field_name];
}
/**
* Get all, or specific admin records from database.
*
* @param string|array $where_clause (OPTIONAL) The WHERE clause of the query to be executed.
* Use this to get specific admin records.
* @return array Returns an array with admin records.
*/
public function get_batch($where_clause = '') {
$role_id = $this->get_admin_role_id();
if ($where_clause != '') {
$this->db->where($where_clause);
}
$batch = $this->db->get_where('ea_users', array('id_roles' => $role_id))->result_array();
// Get every admin settings.
foreach ($batch as &$admin) {
$admin['settings'] = $this->db->get_where('ea_user_settings',
array('id_users' => $admin['id']))->row_array();
unset($admin['settings']['id_users']);
}
return $batch;
}
/**
* Get the admin users role id.
*
* @return int Returns the role record id.
*/
public function get_admin_role_id() {
return intval($this->db->get_where('ea_roles', array('slug' => DB_SLUG_ADMIN))->row()->id);
}
/**
* Validate Records Username
*
* @param string $username The provider records username.
* @param bool $record_exists Whether the record exists or not.
* @return bool Returns the validation result.
*/
public function validate_username($username, $record_exists) {
$num_rows = $this->db->get_where('ea_user_settings', array('username' => $username))->num_rows();
if (($num_rows == 0 && $record_exists == FALSE) || ($num_rows == 1 && $record_exists == TRUE)
|| ($num_rows == 0 && $record_exists == TRUE)) {
return TRUE; // valid
} else {
return FALSE; // not valid
}
}
}
/* End of file admins_model.php */
/* Location: ./application/models/admins_model.php */