Regex.swift

//
//  Regex.swift
//

extension String {
    public var byStrippingFormatCharacters: String {
        var result = self

        // #H1, #H2
        Regex.headerRegex.matches(in: result, options: [], range: NSMakeRange(0, result.count)).forEach {
            (match) in
            let syntax = match.range(withName: "syntax")
            let nsString = NSString(string: result)
            result = nsString.replacingCharacters(in: syntax, with: "")
        }
        
        // * bullet
        Regex.bulletRegex.matches(in: result, options: [], range: NSMakeRange(0, result.count)).forEach {
            (match) in
            let syntax = match.range(withName: "syntax")
            let nsString = NSString(string: result)
            result = nsString.replacingCharacters(in: syntax, with: "")
        }
        
        // *Bold*
        Regex.boldRegex.matches(in: result, options: [], range: NSMakeRange(0, result.count)).forEach {
            (match) in
            let leading = match.range(withName: "leading")
            let trailing = match.range(withName: "trailing")
            let nsString = NSString(string: result)
            let intermediate = nsString
                .replacingCharacters(in: trailing, with: "")
            result = NSString(string: intermediate)
                .replacingCharacters(in: leading, with: "")
        }
        
        // -Strikethrough-
        Regex.strikethroughRegex.matches(in: result, options: [], range: NSMakeRange(0, result.count)).forEach {
            (match) in
            let leading = match.range(withName: "leading")
            let trailing = match.range(withName: "trailing")
            let nsString = NSString(string: result)
            let intermediate = nsString
                .replacingCharacters(in: trailing, with: "")
            result = NSString(string: intermediate)
                .replacingCharacters(in: leading, with: "")
        }
        
        // _Underline_
        Regex.underlineRegex.matches(in: result, options: [], range: NSMakeRange(0, result.count)).forEach {
            (match) in
            let leading = match.range(withName: "leading")
            let trailing = match.range(withName: "trailing")
            let nsString = NSString(string: result)
            let intermediate = nsString
                .replacingCharacters(in: trailing, with: "")
            result = NSString(string: intermediate)
                .replacingCharacters(in: leading, with: "")
        }
        
        // ::highlight::
        Regex.highlightRegex.matches(in: result, options: [], range: NSMakeRange(0, result.count)).forEach {
            (match) in
            let leading = match.range(withName: "leading")
            let trailing = match.range(withName: "trailing")
            let nsString = NSString(string: result)
            let intermediate = nsString
                .replacingCharacters(in: trailing, with: "")
            result = NSString(string: intermediate)
                .replacingCharacters(in: leading, with: "")
        }
        
        result = result.byStrippingCheckboxes
        
        return result
    }
}