how to pass value to struct dynamically - ios

Question

I am trying to form an URL dynamically.
where I am using Struct to construct it form resultant url
Constants.Swift
import Foundation
private struct Domains {
static let Local = "localhost IP"
static let QA = "QA.Environment"
static let UAT = "http://test-UAT.com"
}
// HardCoded URLRoutes
private struct URLRoutes{
static let query = "query=bitcoin&"
static let date = "date=2019-04-04&"
static let sortBy = "sortBy=Date&"
}
private static let constructionURL = Domain.local+URLRoutes.query + URLRoutes.date + URLRoutes.sortBy + API.Key
static var ResultantURL: String {
return constructionURL
}
I am trying to make this dynamic to pass value from other class to form the dynamic url.
private struct URLRoutes{
var query : String
var date : String?
var sortBy : String?
}
From another Class trying to access the resultant URL
url = URL(string: URLRoutes.ResultantURL)!
but how can I construct the formate of url from the another class?
static let query = "query=bitcoin&"
static let date = "date=2019-04-04&"
static let sortBy = "sortBy=Date&"
Your inputs will guide me.

Answer 1

Here's playground code that does what you want:
struct API {
static let Key = "ABC123"
}
struct URLRoutes{
var query : String
var date : String?
var sortBy : String?
var constructionURL: String {
return query + (date ?? "") + (sortBy ?? "") + API.Key
}
}
let query = "query=bitcoin&"
let date = "date=2019-04-04&"
let sortBy = "sortBy=Date&"
let myRoute = URLRoutes(query: query, date: date, sortBy: sortBy)
print(myRoute.constructionURL)
However, this isn't really ideal and doesn't use the constructs that Apple provides. Here's another approach:
struct URLRoute {
var queryItems:[URLQueryItem]
init(query: String, date:String?, sortBy:String?) {
queryItems = [
URLQueryItem(name: "query", value: query),
URLQueryItem(name: "date", value: date),
URLQueryItem(name: "sortBy", value: sortBy),
URLQueryItem(name: "api_key", value: API.Key)
]
}
var constructionURL:String {
get {
var component = URLComponents(string: "")
component?.queryItems = queryItems
return component?.string ?? ""
}
}
}
let betterRoute = URLRoute(query: "bitcoin", date: "2019-04-04", sortBy: "Date")
print(betterRoute.constructionURL)
You can use URLComponents to do lots of heavy lifting for you in creating valid URLs.