elpha-ios/elpha-ios/String+HtmlAttributed.swift

//
//  String+HtmlAttributed.swift
//  elpha-ios
//
//  Created by Dwayne Harris on 11/6/18.
//  Copyright © 2018 Elpha. All rights reserved.
//

import UIKit

extension String {
    func htmlAttributed(size: CGFloat, centered: Bool = false, color: UIColor? = nil) -> NSAttributedString? {
        let color = color ?? UIColor(named: "Text")!
        
        do {
            let htmlString = """
                             <style>
                             html * {
                                 font-family: -apple-system !important;
                                 font-size: \(size)px !important;
                                 color: \(color.hexString()) !important;
                                 text-align: \(centered ? "center" : "initial") !important;
                             }
                             p:last-child {
                                 margin-bottom: 0px !important;
                             }
                             </style>
                             \(self)
                             """
            
            guard let data = htmlString.data(using: String.Encoding.utf16) else {
                return nil
            }
            
            return try NSAttributedString(
                data: data,
                options: [.documentType: NSAttributedString.DocumentType.html],
                documentAttributes: nil
            )
        } catch {
            print("\(error)")
            return nil
        }
    }
}