WebService

A lightweight Web API for Apple devices, written in Swift 5.x and using Combine.

Features

	Features
Request	Build your URLRequest to make a call
WebService	Main object you can subclass to create an API client.
URLRequestEncodable Protocol	If you would like to provide your own request builder

Usage

There are three libraries that you can use.

1. WebService is the core library that provides the closure base APIs to fetch data. Just import WebService at the top of the Swift file that will interact create the API for web call.
2. WebServiceCombine provides the Combine based API.
3. WebServiceConcurrency provides the structured concurrecny based api that is backwards compatiable.

import WebService

You now make your client

class APIClient {
    let webService: WebService

    init(baseURLString: String, session: URLSession = .shared) {
        webService = WebService(baseURLString: baseURLString, session: session)
    }
}

Once you have setup the service you can start to add your APIs for your backend service. This is hypothetical search call to get your search Data

func search(query: String, limit: UInt) -> AnyPublisher<SearchResponse, Error>? {
    let queryParameters: [String: Any] = ["query": query, "limit": limit]
    return webService.GET("/search").setQueryParameters(query)
        .tryMap { (result) -> Data in
            let validData = try result.data.ws_validate(result.response).ws_validateNotEmptyData()
            return validData
    }
    .decode(type: SearchResponse.self, decoder: JSONDecoder())
    .receive(on: queue)
    .eraseToAnyPublisher()
}

Request

If you did not want the service to build your URLRequest you can build your request using the Request structure.

func search<ObjectType: Decodable>(query: String, limit: UInt) -> AnyPublisher<SearchResponse, Error>? {
    let request = Request(.GET, url: webService.baseURLString + "/search")
        .setQueryParameters(query)
        .setHeaders([Request.Header.contentType: Request.ContentType.json])

    return webService.servicePublisher(request: request)
        .tryMap { (result) -> Data in
            let validData = try result.data.ws_validate(result.response).ws_validateNotEmptyData()
            return validData
    }
    .decode(type: ObjectType.self, decoder: JSONDecoder())
    .receive(on: queue)
    .eraseToAnyPublisher()
}

async/await

func search<ObjectType: Decodable>(query: String, limit: UInt) async throws -> SearchResponse {
    let request = Request(.GET, url: webService.baseURLString + "/search")
        .setQueryParameters(query)
        .setHeaders([Request.Header.contentType: Request.ContentType.json])
    return try await webService.decodable(request)
}