Swiftgram/TelegramUI/UrlEscaping.swift

import Foundation

extension CharacterSet {
    static let urlQueryValueAllowed: CharacterSet = {
        let generalDelimitersToEncode = ":#[]@"
        let subDelimitersToEncode = "!$&'()*+,;="
        
        var allowed = CharacterSet.urlQueryAllowed
        allowed.remove(charactersIn: generalDelimitersToEncode + subDelimitersToEncode)
        
        return allowed
    }()
}