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<?php
class Giftcard extends CI_Model
{
    /*
    Determines if a given giftcard_id is a giftcard
    */
    public function exists($giftcard_id)
    {
        $this->db->from('giftcards');
        $this->db->where('giftcard_id', $giftcard_id);
        $this->db->where('deleted', 0);

        return ($this->db->get()->num_rows() == 1);
    }
    
    /*
    Gets max gift card number
    */
    public function get_max_number()
    {
        $this->db->select_max('giftcard_number');
        $this->db->from('giftcards');
        $this->db->where('giftcard_number REGEXP', "'^[0-9]+$'", FALSE);

        return $this->db->get()->row();
    }
    
    /*
    Gets total of rows
    */
    public function get_total_rows()
    {
        $this->db->from('giftcards');
        $this->db->where('deleted', 0);

        return $this->db->count_all_results();
    }

    /*
    Gets information about a particular giftcard
    */
    public function get_info($giftcard_id)
    {
        $this->db->from('giftcards');
        $this->db->join('people', 'people.person_id = giftcards.person_id', 'left');
        $this->db->where('giftcard_id', $giftcard_id);
        $this->db->where('deleted', 0);

        $query = $this->db->get();

        if($query->num_rows() == 1)
        {
            return $query->row();
        }
        else
        {
            //Get empty base parent object, as $giftcard_id is NOT an giftcard
            $giftcard_obj = new stdClass();

            //Get all the fields from giftcards table
            foreach($this->db->list_fields('giftcards') as $field)
            {
                $giftcard_obj->$field = '';
            }

            return $giftcard_obj;
        }
    }

    /*
    Gets an giftcard id given an giftcard number
    */
    public function get_giftcard_id($giftcard_number)
    {
        $this->db->from('giftcards');
        $this->db->where('giftcard_number', $giftcard_number);
        $this->db->where('deleted', 0);

        $query = $this->db->get();

        if($query->num_rows() == 1)
        {
            return $query->row()->giftcard_id;
        }

        return FALSE;
    }

    /*
    Gets information about multiple giftcards
    */
    public function get_multiple_info($giftcard_ids)
    {
        $this->db->from('giftcards');
        $this->db->where_in('giftcard_id', $giftcard_ids);
        $this->db->where('deleted', 0);
        $this->db->order_by('giftcard_number', 'asc');

        return $this->db->get();
    }

    /*
    Inserts or updates a giftcard
    */
    public function save(&$giftcard_data, $giftcard_id = -1)
    {
        if($giftcard_id == -1 || !$this->exists($giftcard_id))
        {
            if($this->db->insert('giftcards', $giftcard_data))
            {
                $giftcard_data['giftcard_id'] = $this->db->insert_id();

                return TRUE;
            }

            return FALSE;
        }

        $this->db->where('giftcard_id', $giftcard_id);

        return $this->db->update('giftcards', $giftcard_data);
    }

    /*
    Updates multiple giftcards at once
    */
    public function update_multiple($giftcard_data, $giftcard_ids)
    {
        $this->db->where_in('giftcard_id', $giftcard_ids);

        return $this->db->update('giftcards', $giftcard_data);
    }

    /*
    Deletes one giftcard
    */
    public function delete($giftcard_id)
    {
        $this->db->where('giftcard_id', $giftcard_id);

        return $this->db->update('giftcards', array('deleted' => 1));
    }

    /*
    Deletes a list of giftcards
    */
    public function delete_list($giftcard_ids)
    {
        $this->db->where_in('giftcard_id', $giftcard_ids);

        return $this->db->update('giftcards', array('deleted' => 1));
    }

    /*
    Get search suggestions to find giftcards
    */
    public function get_search_suggestions($search, $limit = 25)
    {
        $suggestions = array();

        $this->db->from('giftcards');
        $this->db->like('giftcard_number', $search);
        $this->db->where('deleted', 0);
        $this->db->order_by('giftcard_number', 'asc');
        foreach($this->db->get()->result() as $row)
        {
            $suggestions[]=array('label' => $row->giftcard_number);
        }

        $this->db->from('customers');
        $this->db->join('people', 'customers.person_id = people.person_id', 'left');
        $this->db->group_start();
            $this->db->like('first_name', $search);
            $this->db->or_like('last_name', $search);
            $this->db->or_like('CONCAT(first_name, " ", last_name)', $search);
        $this->db->group_end();
        $this->db->where('deleted', 0);
        $this->db->order_by('last_name', 'asc');
        foreach($this->db->get()->result() as $row)
        {
            $suggestions[] = array('label' => $row->first_name.' '.$row->last_name);
        }           

        //only return $limit suggestions
        if(count($suggestions > $limit))
        {
            $suggestions = array_slice($suggestions, 0, $limit);
        }

        return $suggestions;
    }
    
    /*
    Performs a search on giftcards
    */
    public function search($search, $rows = 0, $limit_from = 0, $sort = 'giftcard_number', $order = 'asc')
    {
        $this->db->from('giftcards');
        $this->db->join('people', 'giftcards.person_id = people.person_id', 'left');
        $this->db->group_start();
            $this->db->like('first_name', $search);
            $this->db->or_like('last_name', $search);
            $this->db->or_like('CONCAT(first_name, " ", last_name)', $search);
            $this->db->or_like('giftcard_number', $search);
            $this->db->or_like('giftcards.person_id', $search);
        $this->db->group_end();
        $this->db->where('giftcards.deleted', 0);
        $this->db->order_by($sort, $order);

        if($rows > 0)
        {
            $this->db->limit($rows, $limit_from);
        }

        return $this->db->get();
    }
    
    /*
    Gets gift cards
    */
    public function get_found_rows($search)
    {
        $this->db->from('giftcards');
        $this->db->join('people', 'giftcards.person_id = people.person_id', 'left');
        $this->db->group_start();
            $this->db->like('first_name', $search);
            $this->db->or_like('last_name', $search);
            $this->db->or_like('CONCAT(first_name, " ", last_name)', $search);
            $this->db->or_like('giftcard_number', $search);
            $this->db->or_like('giftcards.person_id', $search);
        $this->db->group_end();
        $this->db->where('giftcards.deleted', 0);

        return $this->db->get()->num_rows();
    }
    
    /*
    Gets gift card value
    */
    public function get_giftcard_value($giftcard_number)
    {
        if( !$this->exists($this->get_giftcard_id($giftcard_number)) )
        {
            return 0;
        }
        
        $this->db->from('giftcards');
        $this->db->where('giftcard_number', $giftcard_number);

        return $this->db->get()->row()->value;
    }
    
    /*
    Updates gift card value
    */
    public function update_giftcard_value($giftcard_number, $value)
    {
        $this->db->where('giftcard_number', $giftcard_number);
        $this->db->update('giftcards', array('value' => $value));
    }

    /*
    Determines if a given giftcard_name esists
    */
    public function exists_gitcard_name($giftcard_name)
    {
        $giftcard_name = strtoupper($giftcard_name);
        $this->db->from('giftcards');
        $this->db->where('giftcard_number', $giftcard_name);
        $this->db->where('deleted', 0);

        return ($this->db->get()->num_rows() == 1);
    }

    /*
    Generate unique gift card name/number
    */
    public function generate_unique_giftcard_name($value)
    {
        $value = str_replace('.', 'DE', $value);
        $random = bin2hex(openssl_random_pseudo_bytes(3));
        $giftcard_name = (string)$random . '-' . $value;
        if($this->exists_gitcard_name($giftcard_name))
        {
            $this->generate_unique_giftcard_name($value);
        }

        return strtoupper($giftcard_name);
    }

    /*
    Gets gift card customer
    */
    public function get_giftcard_customer($giftcard_number)
    {
        if( !$this->exists($this->get_giftcard_id($giftcard_number)) )
        {
            return 0;
        }
        
        $this->db->from('giftcards');
        $this->db->where('giftcard_number', $giftcard_number);

        return $this->db->get()->row()->person_id;
    }
}
?>