extension ServiceProviderProfileViewController : UICollectionViewDelegate, UICollectionViewDataSource {
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return categories.count
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        
        let cell = categoryCollectionView.dequeueReusableCell(withReuseIdentifier: "CategoryCollectionViewCell", for: indexPath) as! CategoryCollectionViewCell

            cell.categoryLabel.text = categories[indexPath.row]
        
            if indexPath.row == selectedCellIndex {
                cell.categoryView.layer.borderColor = UIColor.blue.cgColor
                cell.categoryLabel.textColor = UIColor.blue
            } else {
                cell.categoryView.layer.borderColor = UIColor.lightGray.cgColor
                cell.categoryLabel.textColor = UIColor.gray
            }
            return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        selectedCellIndex = indexPath.row
        self.categoryCollectionView.reloadData()
    }
    
}