motorbike/app/Models/Groups.php

<?php
namespace App\Models;
use CodeIgniter\Model;

class Groups extends Model
{
    /**
     * table name
     * @var string
     */
    protected $table = 'groups';
    protected $primaryKey = 'id';
    protected $allowedFields = ['group_name', 'permission'];
    protected $useTimestamps = false;

    /**
     * Get group data by groupId or all (excluding id = 1)
     * @param mixed $groupId
     * @return array|object|null
     */
    public function getGroupData($groupId = null)
    {
        if ($groupId) {
            return $this->find($groupId);
        }
        return $this->where('id !=', 1)->findAll();
    }

    /**
     * Create new group
     * @param mixed $data
     * @return bool|int|string
     */
    public function createGroup($data)
    {
        return $this->insert($data);
    }

    /**
     * Edit group by id
     * @param mixed $data
     * @param mixed $id
     * @return bool
     */
    public function editGroup($data, $id)
    {
        return $this->update($id, $data);
    }

    /**
     * Delete group by id
     * @param mixed $id
     * @return bool
     */
    public function deleteGroup($id)
    {
        return $this->delete($id);
    }

    /**
     * Check if group exists in user_group table
     * @param mixed $id
     * @return bool
     */
    public function existInUserGroup($id)
    {
        return $this->db->table('user_group')->where('group_id', $id)->countAllResults() > 0;
    }

    /**
     * Count users in a specific group
     * @param mixed $id
     * @return int
     */
    public function countUsersInGroup($id)
    {
        return $this->db->table('user_group')->where('group_id', $id)->countAllResults();
    }

    /**
     * Remove all users from a specific group
     * @param mixed $id
     * @return bool
     */
    public function removeUsersFromGroup($id)
    {
        return $this->db->table('user_group')->where('group_id', $id)->delete();
    }
    /**
     * Get user group by userId
     * @param mixed $userId
     * @return array|null
     */
    public function getUserGroupByUserId($userId)
    {
        return $this->db->table('user_group')
            ->join('groups', 'groups.id = user_group.group_id')
            ->where('user_group.user_id', $userId)
            ->get()
            ->getRowArray();
    }
}