easyappointments/application/models/Users_model.php

<?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
 * ---------------------------------------------------------------------------- */

/**
 * Users model
 *
 * Handles all the database operations of the user resource.
 *
 * @package Models
 */
class Users_model extends EA_Model {
    /**
     * @var array
     */
    protected $casts = [
        'id' => 'integer',
        'id_roles' => 'integer',
    ];
    
    /**
     * Save (insert or update) a user.
     *
     * @param array $user Associative array with the user data.
     *
     * @return int Returns the user ID.
     *
     * @throws InvalidArgumentException
     */
    public function save(array $user): int
    {
        $this->validate($user);

        if (empty($user['id']))
        {
            return $this->insert($user);
        }
        else
        {
            return $this->update($user);
        }
    }

    /**
     * Validate the user data.
     *
     * @param array $user Associative array with the user data.
     *
     * @throws InvalidArgumentException
     */
    public function validate(array $user)
    {
        // If a user ID is provided then check whether the record really exists in the database.
        if ( ! empty($user['id']))
        {
            $count = $this->db->get_where('users', ['id' => $user['id']])->num_rows();

            if ( ! $count)
            {
                throw new InvalidArgumentException('The provided user ID does not exist in the database: ' . $user['id']);
            }
        }

        // Make sure all required fields are provided.
        if (
            empty($user['first_name'])
            || empty($user['last_name'])
            || empty($user['email'])
            || empty($user['phone_number'])
        )
        {
            throw new InvalidArgumentException('Not all required fields are provided: ' . print_r($user, TRUE));
        }
    }

    /**
     * Insert a new user into the database.
     *
     * @param array $user Associative array with the user data.
     *
     * @return int Returns the user ID.
     *
     * @throws RuntimeException
     */
    protected function insert(array $user): int
    {
        $settings = $user['settings'];
        unset($user['settings']);

        if ( ! $this->db->insert('users', $user))
        {
            throw new RuntimeException('Could not insert user.');
        }

        $user['id'] = $this->db->insert_id();
        $settings['salt'] = generate_salt();
        $settings['password'] = hash_password($settings['salt'], $settings['password']);

        $this->save_settings($user['id'], $settings);

        return $user['id'];
    }

    /**
     * Update an existing user.
     *
     * @param array $user Associative array with the user data.
     *
     * @return int Returns the user ID.
     *
     * @throws RuntimeException
     */
    protected function update(array $user): int
    {
        $settings = $user['settings'];
        unset($user['settings']);

        if (isset($settings['password']))
        {
            $existing_settings = $this->db->get_where('user_settings', ['id_users' => $user['id']])->row_array();

            if (empty($existing_settings))
            {
                throw new RuntimeException('No settings record found for user with ID: ' . $user['id']);
            }

            $settings['password'] = hash_password($existing_settings['salt'], $settings['password']);
        }

        if ( ! $this->db->update('users', $user, ['id' => $user['id']]))
        {
            throw new RuntimeException('Could not update user.');
        }

        $this->save_settings($user['id'], $settings);

        return $user['id'];
    }

    /**
     * Remove an existing user from the database.
     *
     * @param int $user_id User ID.
     *
     * @throws RuntimeException
     */
    public function delete(int $user_id)
    {
        if ( ! $this->db->delete('users', ['id' => $user_id]))
        {
            throw new RuntimeException('Could not delete user.');
        }
    }

    /**
     * Get a specific user from the database.
     *
     * @param int $user_id The ID of the record to be returned.
     *
     * @return array Returns an array with the user data.
     *
     * @throws InvalidArgumentException
     */
    public function find(int $user_id): array
    {
        if ( ! $this->db->get_where('users', ['id' => $user_id])->num_rows())
        {
            throw new InvalidArgumentException('The provided user ID was not found in the database: ' . $user_id);
        }

        $user = $this->db->get_where('users', ['id' => $user_id])->row_array();
        
        $this->cast($user);

        $user['settings'] = $this->db->get_where('user_settings', ['id_users' => $user_id])->row_array();

        unset($user['settings']['id_users']);

        return $user;
    }

    /**
     * Get a specific field value from the database.
     *
     * @param int $user_id User ID.
     * @param string $field Name of the value to be returned.
     *
     * @return string Returns the selected user value from the database.
     *
     * @throws InvalidArgumentException
     */
    public function value(int $user_id, string $field): string
    {
        if (empty($field))
        {
            throw new InvalidArgumentException('The field argument is cannot be empty.');
        }

        if (empty($user_id))
        {
            throw new InvalidArgumentException('The user ID argument cannot be empty.');
        }

        // Check whether the user exists.
        $query = $this->db->get_where('users', ['id' => $user_id]);

        if ( ! $query->num_rows())
        {
            throw new InvalidArgumentException('The provided user ID was not found in the database: ' . $user_id);
        }

        // Check if the required field is part of the user data.
        $user = $query->row_array();
        
        $this->cast($user);

        if ( ! array_key_exists($field, $user))
        {
            throw new InvalidArgumentException('The requested field was not found in the user data: ' . $field);
        }

        return $user[$field];
    }

    /**
     * Get all users that match the provided criteria.
     *
     * @param array|string $where Where conditions
     * @param int|null $limit Record limit.
     * @param int|null $offset Record offset.
     * @param string|null $order_by Order by.
     *
     * @return array Returns an array of users.
     */
    public function get($where = NULL, int $limit = NULL, int $offset = NULL, string $order_by = NULL): array
    {
        if ($where !== NULL)
        {
            $this->db->where($where);
        }

        if ($order_by !== NULL)
        {
            $this->db->order_by($order_by);
        }

        $users = $this->db->get('users', $limit, $offset)->result_array();

        foreach ($users as &$user)
        {
            $this->cast($user);
            
            $user['settings'] = $this->db->get_where('user_settings', ['id_users' => $user['id']])->row_array();

            unset(
                $user['settings']['id_users'],
                $user['settings']['password'],
                $user['settings']['salt']
            );
        }

        return $users;
    }

    /**
     * Save the user settings.
     *
     * @param int $user_id User ID.
     * @param array $settings Associative array with the settings data.
     *
     * @throws InvalidArgumentException
     */
    protected function save_settings(int $user_id, array $settings)
    {
        if (empty($settings))
        {
            throw new InvalidArgumentException('The settings argument cannot be empty.');
        }

        // Make sure the settings record exists in the database. 
        $count = $this->db->get_where('user_settings', ['id_users' => $user_id])->num_rows();

        if ( ! $count)
        {
            $this->db->insert('user_settings', ['id_users' => $user_id]);
        }

        foreach ($settings as $name => $value)
        {
            $this->set_setting($user_id, $name, $value);
        }
    }

    /**
     * Set the value of a user setting.
     *
     * @param int $user_id User ID.
     * @param string $name Setting name.
     * @param string $value Setting value.
     */
    public function set_setting(int $user_id, string $name, string $value)
    {
        if ( ! $this->db->update('user_settings', [$name => $value], ['id_users' => $user_id]))
        {
            throw new RuntimeException('Could not set the new user setting value: ' . $name);
        }
    }

    /**
     * Get the value of a user setting.
     *
     * @param int $user_id User ID.
     * @param string $name Setting name.
     *
     * @return string Returns the value of the requested user setting.
     */
    public function get_setting(int $user_id, string $name): string
    {
        $settings = $this->db->get_where('user_settings', ['id_users' => $user_id])->row_array();

        if (empty($settings[$name]))
        {
            throw new RuntimeException('The requested setting value was not found: ' . $user_id);
        }

        return $settings[$name];
    }

    /**
     * Get the query builder interface, configured for use with the users table.
     *
     * @return CI_DB_query_builder
     */
    public function query(): CI_DB_query_builder
    {
        return $this->db->from('users');
    }

    /**
     * Search users by the provided keyword.
     *
     * @param string $keyword Search keyword.
     * @param int|null $limit Record limit.
     * @param int|null $offset Record offset.
     * @param string|null $order_by Order by.
     *
     * @return array Returns an array of settings.
     */
    public function search(string $keyword, int $limit = NULL, int $offset = NULL, string $order_by = NULL): array
    {
        $users = $this
            ->db
            ->select()
            ->from('users')
            ->like('first_name', $keyword)
            ->or_like('last_name', $keyword)
            ->or_like('email', $keyword)
            ->or_like('phone_number', $keyword)
            ->or_like('mobile_number', $keyword)
            ->or_like('address', $keyword)
            ->or_like('city', $keyword)
            ->or_like('state', $keyword)
            ->or_like('zip_code', $keyword)
            ->or_like('notes', $keyword)
            ->limit($limit)
            ->offset($offset)
            ->order_by($order_by)
            ->get()
            ->result_array();

        foreach ($users as &$user)
        {
            $this->cast($user);
        }

        return $users;
    }

    /**
     * Attach related resources to a user.
     *
     * @param array $user Associative array with the user data.
     * @param array $resources Resource names to be attached.
     *
     * @throws InvalidArgumentException
     */
    public function attach(array &$user, array $resources)
    {
        // Users do not currently have any related resources. 
    }
}