SweetRouter

Declarative URL routing in swift for Alamofire and not only :)

Integration

CocoaPods

You can use CocoaPods to install SweetRouter by adding it to your Podfile:

platform :ios, '8.0'
use_frameworks!

target 'MyApp' do
pod 'SweetRouter'
end

Carthage

You can use Carthage to install SweetRouter by adding it to your Cartfile:

github "alickbass/SweetRouter"

Definitions

Imagine that you use the following URLs within your App

https://myservercom.com:123/api/new/signIn
https://myservercom.com:123/api/new/signOut
https://myservercom.com:123/api/new/posts?date=today&userId=id

Every URL in the list is called an Endpoint

Endpoint

Endpoint has the following structure:

                               Endpoint
┌─────────────────────────────────┴────────────────────────────────────┐
https://myservercom.com:123/api/new/posts?date=today&userId=id#paragraph
└────────────────┬────────────────┘└────────────────┬──────────────────┘
            Environment                           Route

Endpoint is represented with EndpointType protocol.

Environment

Environment has the following structure:

            Environment
┌────────────────┴─────────────────┐
https://myservercom.com:123/api/new/posts?date=today&userId=id#paragraph
└─┬─┘  └───────┬───────┘└┬┘└─────┬─┘
scheme        host     port default path

Examples of Environment

URL.Env(.https, "mytestserver.com").at("api", "new") // https://mytestserver.com/api/new/
URL.Env(IP(127, 0, 0, 1), 8080) // http://127.0.01:8080
URL.Env.localhost(4001) // http://localhost:4001

Route

Route has the following structure:

                                                   Route
                                   ┌─────────────────┴─────────────────┐
https://myservercom.com:123/api/new/posts?date=today&userId=id#paragraph
                                   └──┬──┘└────────┬─────────┘└───┬────┘
                                     path        query         fragment

Example of Route

// /api/new/posts?date=today&userId=id#paragraph
URL.Route(at: "api", "new", "posts").query(("date", "today"), ("userId", "id")).fragment("paragraph")

Example of usage

Here is an example of the Router for some back-end API:

enum Api: EndpointType {
    enum Environment: EnvironmentType {
        case localhost
        case test
        case production
        
        var value: URL.Env {
            switch self {
            case .localhost: return .localhost(8080)
            case .test: return .init(IP(126, 251, 20, 32))
            case .production: return .init(.https, "myproductionserver.com", 3000)
            }
        }
    }
    
    enum Route: RouteType {
        case auth, me
        case posts(for: Date)
        
        var route: URL.Route {
            switch self {
            case .me: return .init(at: "me")
            case .auth: return .init(at: "auth")
            case let .posts(for: date):
                return URL.Route(at: "posts").query(("date", date), ("userId", "someId"))
            }
        }
    }
    
    static let current: Environment = .localhost
}

And in our application we would use it like this:

print(Router<Api>(at: .me).url) // http://localhost:8080/me
print(Router<Api>(.test, at: .auth).url) // http://126.251.20.32/auth
print(Router<Api>(.production, at: .posts(for: Date())).url) // https://myproductionserver.com:3000/posts?date=12.04.2017&userId=someId

What if I have only one environment?

It can often happen, that you will be using some third-party API and you will have only access to Production environment. So in this case your Router will look something like this:

struct Auth: EndpointType {
    enum Route: RouteType {
        case signIn, signOut
        
        var route: URL.Route {
            switch self {
            case .signIn: return .init(path: ["signIn"])
            case .signOut: return .init(path: ["signOut"])
            }
        }
    }
    
    static let current = URL.Env(.https, "auth.server.com", 8080).at("api", "new")
}

And use it like this:

print(Router<Auth>(at: .signIn).url) // https://auth.server.com:8080/api/new/signIn
print(Router<Auth>(at: .signOut).url) // https://auth.server.com:8080/api/new/signOut

How to use with Alamofire?

Add the following code somewhere in your app:

import Alamofire
import SweetRouter

extension Router: URLConvertible {
    public func asURL() throws -> URL {
        return url
    }
}

And then you can use the same Routers like this:

Alamofire.request(Router<Auth>(at: .signIn))

As easy as that 😉