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iflrandevu/application/models/Admins_model.php

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<?php defined('BASEPATH') or exit('No direct script access allowed');
/* ----------------------------------------------------------------------------
* Easy!Appointments - Open Source Web Scheduler
*
* @package EasyAppointments
* @author A.Tselegidis <alextselegidis@gmail.com>
* @copyright Copyright (c) 2013 - 2020, Alex Tselegidis
* @license http://opensource.org/licenses/GPL-3.0 - GPLv3
* @link http://easyappointments.org
* @since v1.0.0
* ---------------------------------------------------------------------------- */
/**
* Admins Model Class
*
* Handles the database actions for admin users management.
*
* @package Models
*/
class Admins_model extends EA_Model {
public function __construct()
{
parent::__construct();
$this->load->helper('general');
$this->load->helper('data_validation');
}
/**
* 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 (int)$admin['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)
{
// 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('users', ['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'],
$admin['email'],
$admin['phone_number']
))
{
throw new Exception('Not all required fields are provided: ' . print_r($admin, TRUE));
}
// Validate admin email address.
if ( ! filter_var($admin['email'], FILTER_VALIDATE_EMAIL))
{
throw new Exception('Invalid email address provided: ' . $admin['email']);
}
// Check if username exists.
if (isset($admin['settings']['username']))
{
$user_id = (isset($admin['id'])) ? $admin['id'] : '';
if ( ! $this->validate_username($admin['settings']['username'], $user_id))
{
throw new Exception ('Username already exists. Please select a different '
. 'username for this record.');
}
}
// Validate admin password
if (isset($admin['settings']['password']))
{
if (strlen($admin['settings']['password']) < MIN_PASSWORD_LENGTH)
{
throw new Exception('The user password must be at least '
. MIN_PASSWORD_LENGTH . ' characters long.');
}
}
if ( ! isset($admin['id']) && ! isset($admin['settings']['password']))
{
throw new Exception('The user password cannot be empty for new users.');
}
// Validate calendar view mode.
if (isset($admin['settings']['calendar_view']) && ($admin['settings']['calendar_view'] !== CALENDAR_VIEW_DEFAULT
&& $admin['settings']['calendar_view'] !== CALENDAR_VIEW_TABLE))
{
throw new Exception('The calendar view setting must be either "' . CALENDAR_VIEW_DEFAULT
. '" or "' . CALENDAR_VIEW_TABLE . '", given: ' . $admin['settings']['calendar_view']);
}
// When inserting a record the email address must be unique.
$admin_id = isset($admin['id']) ? $admin['id'] : '';
$num_rows = $this->db
->select('*')
->from('users')
->join('roles', 'roles.id = users.id_roles', 'inner')
->where('roles.slug', DB_SLUG_ADMIN)
->where('users.email', $admin['email'])
->where('users.id !=', $admin_id)
->get()
->num_rows();
if ($num_rows > 0)
{
throw new Exception('Given email address belongs to another admin record. '
. 'Please use a different email.');
}
return TRUE; // Operation completed successfully.
}
/**
* Validate Records Username
*
* @param string $username The provider records username.
* @param int $user_id The user record id.
*
* @return bool Returns the validation result.
*/
public function validate_username($username, $user_id)
{
if ( ! empty($user_id))
{
$this->db->where('id_users !=', $user_id);
}
$this->db->where('username', $username);
return $this->db->get('user_settings')->num_rows() === 0;
}
/**
* 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('users')
->join('roles', 'roles.id = users.id_roles', 'inner')
->where('users.email', $admin['email'])
->where('roles.slug', DB_SLUG_ADMIN)
->get()->num_rows();
return $num_rows > 0;
}
/**
* 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('users.id')
->from('users')
->join('roles', 'roles.id = users.id_roles', 'inner')
->where('users.email', $admin['email'])
->where('roles.slug', DB_SLUG_ADMIN)
->get();
if ($result->num_rows() == 0)
{
throw new Exception('Could not find admin record id.');
}
return (int)$result->row()->id;
}
/**
* Insert a new admin record into the database.
*
* @param array $admin Contains the admin data.
*
* @return int Returns the new record id.
*
* @throws Exception When the insert operation fails.
*/
protected function insert($admin)
{
$admin['id_roles'] = $this->get_admin_role_id();
$settings = $admin['settings'];
unset($admin['settings']);
$this->db->trans_begin();
if ( ! $this->db->insert('users', $admin))
{
throw new Exception('Could not insert admin into the database.');
}
$admin['id'] = (int)$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('user_settings', $settings))
{
$this->db->trans_rollback();
throw new Exception('Could not insert admin settings into the database.');
}
$this->db->trans_complete();
return $admin['id'];
}
/**
* Get the admin users role id.
*
* @return int Returns the role record id.
*/
public function get_admin_role_id()
{
return (int)$this->db->get_where('roles', ['slug' => DB_SLUG_ADMIN])->row()->id;
}
/**
* Update an existing admin record in the database.
*
* @param array $admin Contains the admin record data.
*
* @return int Returns the record id.
*
* @throws Exception When the update operation fails.
*/
protected function update($admin)
{
$settings = $admin['settings'];
unset($admin['settings']);
$settings['id_users'] = $admin['id'];
if (isset($settings['password']))
{
$salt = $this->db->get_where('user_settings', ['id_users' => $admin['id']])->row()->salt;
$settings['password'] = hash_password($salt, $settings['password']);
}
$this->db->where('id', $admin['id']);
if ( ! $this->db->update('users', $admin))
{
throw new Exception('Could not update admin record.');
}
$this->db->where('id_users', $settings['id_users']);
if ( ! $this->db->update('user_settings', $settings))
{
throw new Exception('Could not update admin settings.');
}
return (int)$admin['id'];
}
/**
* Delete an existing admin record from the database.
*
* @param int $admin_id The admin record id to be deleted.
*
* @return bool Returns the delete operation result.
*
* @throws Exception When the $admin_id is not a valid int value.
* @throws Exception When the record to be deleted is the only one admin user left on the system.
*/
public function delete($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('users',
['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('users', ['id' => $admin_id])->num_rows();
if ($num_rows == 0)
{
return FALSE; // Record does not exist in database.
}
return $this->db->delete('users', ['id' => $admin_id]);
}
/**
* Get a specific admin record from the database.
*
* @param int $admin_id The id of the record to be returned.
*
* @return array Returns an array with the admin user data.
*
* @throws Exception When the $admin_id is not a valid int value.
*/
public function get_row($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('users', ['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('users', ['id' => $admin_id])->row_array();
$admin['settings'] = $this->db->get_where('user_settings',
['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 int $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 $admin_id is not a valid int.
* @throws Exception When the admin record does not exist in the database.
* @throws Exception When the selected field value is not present on database.
*/
public function get_value($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('users', ['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.
$row_data = $result->row_array();
if ( ! array_key_exists($field_name, $row_data))
{
throw new Exception('The given $field_name argument does not exist in the '
. 'database: ' . $field_name);
}
return $row_data[$field_name];
}
/**
* Get all, or specific admin records from database.
*
* @param mixed|null $where (OPTIONAL) The WHERE clause of the query to be executed.
* @param int|null $limit
* @param int|null $offset
* @param mixed|null $order_by
*
* @return array Returns an array with admin records.
*/
public function get_batch($where = NULL, $limit = NULL, $offset = NULL, $order_by = NULL)
{
$role_id = $this->get_admin_role_id();
if ($where !== NULL)
{
$this->db->where($where);
}
if ($order_by !== NULL)
{
$this->db->order_by($order_by);
}
$batch = $this->db->get_where('users', ['id_roles' => $role_id], $limit, $offset)->result_array();
// Get every admin settings.
foreach ($batch as &$admin)
{
$admin['settings'] = $this->db->get_where('user_settings',
['id_users' => $admin['id']])->row_array();
unset($admin['settings']['id_users']);
}
return $batch;
}
}
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