RTLParser.swift

//
//  RTLParser.swift
//
//  Created by Josh Kopecek on 19/08/2021.
//

import Foundation

import MarkdownKit

class MarkdownRTL: MarkdownElement {
    var regex: String = "(.+)"
    
    func regularExpression() throws -> NSRegularExpression {
        return try NSRegularExpression(pattern: regex, options: [])
    }
    
    func match(_ match: NSTextCheckingResult,
                        attributedString: NSMutableAttributedString) {
        let matchAttr = attributedString.attributedSubstring(from: match.range)
        let firstCharAsUnicodeScalar = matchAttr.string.unicodeScalars.first?.value
        if firstCharAsUnicodeScalar != nil && firstCharAsUnicodeScalar! >= 1424 && firstCharAsUnicodeScalar! <= 1983 {
            let rightAlign = NSMutableParagraphStyle()
            rightAlign.alignment = .right
            attributedString.addAttributes([.paragraphStyle: rightAlign], range: match.range)
        }
    }
    
}