taler-ios

iOS apps for GNU Taler (wallet)
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URL+id+iban.swift (3333B)

      1 /*
      2  * This file is part of GNU Taler, ©2022-25 Taler Systems S.A.
      3  * See LICENSE.md
      4  */
      5 /**
      6  * @author Marc Stibane
      7  */
      8 import SwiftUI
      9 
     10 extension URL: Identifiable {
     11     public var id: URL {self}
     12 }
     13 
     14 extension URL {
     15     init(_ string: StaticString) {
     16         self.init(string: "\(string)")!
     17     }
     18 
     19     var cyclos: String? {
     20         /// "payto://cyclos/" host ["/" fpath] "/" account-id [ "?" opts ]
     21         if scheme == "payto", let host = host {
     22             let path = path.dropFirst(1)
     23             if host == "cyclos" {
     24                 return String(path)
     25             } else if host.hasPrefix("cyclos") {
     26                 let cyclos = host.dropFirst(6)
     27                 if path.hasPrefix("/") {
     28                     return String(cyclos + path)
     29                 }
     30                 return String(cyclos + "/" + path)
     31             }
     32         }
     33         return nil
     34     }
     35 
     36     var iban: String? {
     37         /// https://datatracker.ietf.org/doc/rfc8905/
     38         /// payto://iban/DE75512108001245126199?amount=EUR:200.0&message=hello
     39         if scheme == "payto" && host == "iban" {
     40             return lastPathComponent
     41         }
     42         return nil
     43     }
     44 
     45     var xTaler: String? {
     46         /// https://datatracker.ietf.org/doc/rfc8905/
     47         /// payto://iban/DE75512108001245126199?amount=EUR:200.0&message=hello
     48         if scheme == "payto" && host == "x-taler-bank" {
     49             return lastPathComponent
     50         }
     51         return nil
     52     }
     53 
     54     /// SwifterSwift: Dictionary of the URL's query parameters.
     55     var queryParameters: [String:String]? {
     56         guard let components = URLComponents(url: self, resolvingAgainstBaseURL: false),
     57               let queryItems = components.queryItems else { return nil }
     58 
     59         var items: [String:String] = [:]
     60 
     61         for queryItem in queryItems {
     62             items[queryItem.name] = queryItem.value
     63         }
     64         return items
     65     }
     66 
     67     static var docDirUrl: URL? {                    // accessible by FileSharing
     68         if #available(iOS 16.4, *) {
     69             return URL.documentsDirectory
     70         } else {
     71             let docDirNr: FileManager.SearchPathDirectory = .documentDirectory
     72             if let documentsDir = FileManager.default.urls(for: docDirNr, in: .userDomainMask).first {
     73                 return documentsDir
     74             }
     75         }
     76         return nil
     77     }
     78 
     79     static var appSuppUrl: URL? {
     80         if #available(iOS 16.4, *) {
     81             return URL.applicationSupportDirectory
     82         } else {
     83             let appDirNr: FileManager.SearchPathDirectory = .applicationSupportDirectory
     84             if let appSupportDir = FileManager.default.urls(for: appDirNr, in: .userDomainMask).first {
     85                 return appSupportDir
     86             }
     87         }
     88         return nil
     89     }
     90 
     91     func path(withSlash: Bool) -> String {
     92         let path: String
     93         if #available(iOS 16.4, *) {
     94             path = self.path(percentEncoded: false)
     95         } else {
     96             path = self.path
     97         }
     98         if let char = path.last {
     99             let slash: String.Element = "/"
    100 
    101             if withSlash {
    102                 if char != slash {
    103                     return path + String(slash)
    104                 }
    105             } else {
    106                 if char == slash {
    107                     return String(path.dropLast())
    108                 }
    109             }
    110         }
    111         return path
    112     }
    113 }