### Assemble API Client and View in SwiftUI

Source: https://github.com/artemisia-absynthium/arachne/blob/main/Sources/Arachne/Documentation.docc/GettingStarted.md

Integrate Arachne into a SwiftUI application to load and display data. This example shows how to create an API client, manage state, and update the UI.

```swift
import SwiftUI
import Arachne
import os

struct Info: Codable {
    let name: String
}

class MyApiClient {
    private let provider = ArachneProvider<MyAPIService>()

    func loadInfo() async throws -> Info {
        let (data, _) = try await provider.data(.info)
        return try JSONDecoder().decode(Info.self, from: data)
    }
}

@Observable
class MyState {
    private let apiClient = MyApiClient()
    private let logger = Logger(subsystem: "Arachne", category: "MyInteractor")

    var info: Info?

    func getInfo() async {
        do {
            self.info = try await apiClient.loadInfo()
        } catch {
            logger.error("Error: \(error.localizedDescription)")
        }
    }
}

struct MyView: View {
    @State var state = MyState()

    var body: some View {
        Text(state.info?.name ?? "No name")
            .task {
                await viewModel.getInfo()
            }
    }
}
```

--------------------------------

### Instantiate and Use ArachneProvider in Swift

Source: https://github.com/artemisia-absynthium/arachne/blob/main/README.md

Declare an ArachneProvider for your defined API service and use it to fetch data from an endpoint asynchronously. This example shows how to get data from the '.info' endpoint.

```swift
let provider = ArachneProvider<MyAPIService>()
```

```swift
let (data, _) = try await provider.data(.info)
```

--------------------------------

### Initialization Methods

Source: https://github.com/artemisia-absynthium/arachne/blob/main/Sources/Arachne/Documentation.docc/Extensions/ArachneProvider.md

Methods for initializing and configuring the ArachneProvider.

```APIDOC
## Initialization Methods

### `init(urlSession:)`

Initializes the provider with a specific URLSession.

### `with(requestModifier:)`

Returns a new provider with a request modifier applied.

### `with(plugins:)`

Returns a new provider with a list of plugins applied.
```

--------------------------------

### Migrate Combine Publisher to Async/Await

Source: https://github.com/artemisia-absynthium/arachne/blob/main/README.md

Use this snippet to convert existing Combine publisher network calls to the modern async/await syntax for cleaner error handling and asynchronous operations.

```swift
func getInfo() {
    apiClient.loadInfo()
        .sink {
            completion in
            switch completion {
            case .finished:
                break
            case .failure(let error):
                // Handle error
            }
        } receiveValue: {
            info in
            self.info = info
        }
        .store(in: &cancellables)
}
```

```swift
func getInfo() async {
    do {
        self.info = try await apiClient.loadInfo()
    } catch {
        // Handle error
    }
}
```

```swift
func getInfo() {
    Task {
        do {
            self.info = try await apiClient.loadInfo()
        } catch {
            // Handle error
        }
    }
}
```

--------------------------------

### Instantiate an Arachne Provider

Source: https://github.com/artemisia-absynthium/arachne/blob/main/Sources/Arachne/Documentation.docc/GettingStarted.md

Create an instance of `ArachneProvider` to interact with your defined API service.

```swift
let provider = ArachneProvider<MyAPIService>()
```

--------------------------------

### Make a Network Request

Source: https://github.com/artemisia-absynthium/arachne/blob/main/Sources/Arachne/Documentation.docc/GettingStarted.md

Use the `provider.data()` method to fetch data from an API endpoint. This method returns the response data and the URL response.

```swift
let (data, _) = try await provider.data(.info)
```

--------------------------------

### Building URLRequests

Source: https://github.com/artemisia-absynthium/arachne/blob/main/Sources/Arachne/Documentation.docc/Extensions/ArachneProvider.md

Utilities for constructing URLRequests without immediately performing them.

```APIDOC
## Just Build Your URLRequest

### `urlRequest(for:)`

Builds a URLRequest for a given target.

### `buildRequest(target:timeoutInterval:)`

Builds a URLRequest with a specified timeout interval.

### `buildCompleteRequest(target:timeoutInterval:)`

Builds a complete URLRequest, including potential modifications and plugins, with a specified timeout interval.
```

--------------------------------

### Performing Resumable Downloads

Source: https://github.com/artemisia-absynthium/arachne/blob/main/Sources/Arachne/Documentation.docc/Extensions/ArachneProvider.md

Methods for handling resumable download operations.

```APIDOC
## Performing Resumable Downloads

### `download(_:sessionConfiguration:didWriteData:didCompleteTask:)`

Starts a download task with progress and completion callbacks.

### `download(_:withResumeData:sessionConfiguration:didResumeDownload:didWriteData:didCompleteTask:)`

Resumes a previously interrupted download task with specified callbacks.
```

--------------------------------

### SwiftUI Integration with Arachne API Client

Source: https://github.com/artemisia-absynthium/arachne/blob/main/README.md

Demonstrates integrating Arachne into a SwiftUI view to load and display data. It includes a simple Codable struct for data parsing and an asynchronous function to fetch information.

```swift
import SwiftUI
import Arachne
import os

struct Info: Codable {
    let name: String
}

class MyApiClient {
    private let provider = ArachneProvider<MyAPIService>()

    func loadInfo() async throws -> Info {
        let (data, _) = try await provider.data(.info)
        return try JSONDecoder().decode(Info.self, from: data)
    }
}

@Observable
class MyState {
    private let apiClient = MyApiClient()
    private let logger = Logger(subsystem: "Arachne", category: "MyInteractor")

    var info: Info?

    func getInfo() async {
        do {
            self.info = try await apiClient.loadInfo()
        } catch {
            logger.error("Error: \(error.localizedDescription)")
        }
    }
}

struct MyView: View {
    @State var state = MyState()

    var body: some View {
        Text(interactor.info?.name ?? "No name")
            .task {
                await interactor.getInfo()
            }
    }
}
```

--------------------------------

### Define an API Service with Arachne

Source: https://github.com/artemisia-absynthium/arachne/blob/main/Sources/Arachne/Documentation.docc/GettingStarted.md

Define your API endpoints using an enum conforming to `ArachneService`. Specify the base URL, path, query items, HTTP method, body, and headers for each endpoint.

```swift
import Foundation
import Arachne

enum MyAPIService {
    case info
    case userProfile(username: String)
    case postEndpoint(body: MyCodableObject, limit: Int)
}

extension MyAPIService: ArachneService {
    var baseUrl: String {
        "https://myapiservice.com"
    }

    var path: String {
        switch self {
        case .info:
            "/info"
        case .userProfile(let username):
            "/users/\(username)"
        case .postEndpoint:
            "/postendpoint"
        }
    }

    var queryStringItems: [URLQueryItem]? {
        switch self {
        case .postEndpoint(_, let limit):
            [URLQueryItem(name: "limit", value: "\(limit)")]
        default:
            nil
        }
    }

    var method: HttpMethod {
        switch self {
        case .postEndpoint:
            .post
        default:
            .get
        }
    }

    var body: Data? {
        switch self {
        case .postEndpoint(let myCodableObject, _):
            try? JSONEncoder().encode(myCodableObject)
        default:
            nil
        }
    }

    var headers: [String : String]? {
        switch self {
        case .postEndpoint:
            nil
        default:
            ["Accept": "application/json"]
        }
    }
}
```

--------------------------------

### Define API Service Endpoints in Swift

Source: https://github.com/artemisia-absynthium/arachne/blob/main/README.md

Define your API endpoints by conforming to the ArachneService protocol. Specify base URL, path, query items, HTTP method, body, and headers.

```swift
import Foundation
import Arachne

enum MyAPIService {
    case info
    case userProfile(username: String)
    case postEndpoint(body: MyCodableObject, limit: Int)
}

extension MyAPIService: ArachneService {
    var baseUrl: String {
        "https://myapiservice.com"
    }

    var path: String {
        switch self {
        case .info:
            "/info"
        case .userProfile(let username):
            "/users/\(username)"
        case .postEndpoint:
            "/postendpoint"
        }
    }

    var queryStringItems: [URLQueryItem]? {
        switch self {
        case .postEndpoint(_, let limit):
            [URLQueryItem(name: "limit", value: "\(limit)")]
        default:
            nil
        }
    }

    var method: HttpMethod {
        switch self {
        case .postEndpoint:
            .post
        default:
            .get
        }
    }

    var body: Data? {
        switch self{
        case .postEndpoint(let myCodableObject, _):
            try? JSONEncoder().encode(myCodableObject)
        default:
            nil
        }
    }

    var headers: [String : String]? {
        switch self {
        case .postEndpoint:
            nil
        default:
            ["Accept": "application/json"]
        }
    }
}
```

--------------------------------

### Performing Asynchronous Requests

Source: https://github.com/artemisia-absynthium/arachne/blob/main/Sources/Arachne/Documentation.docc/Extensions/ArachneProvider.md

Methods for performing various types of asynchronous network requests.

```APIDOC
## Performing Asynchronous Requests

### `bytes(_:session:)`

Performs a request and returns the raw bytes.

### `data(_:session:)`

Performs a request and returns the raw data.

### `data(_:timeoutInterval:session:)`

Performs a request with a specified timeout interval and returns the raw data.

### `download(_:session:)`

Initiates a download request.

### `download(_:timeoutInterval:session:)`

Initiates a download request with a specified timeout interval.

### `upload(_:session:from:)`

Initiates an upload request from data.

### `upload(_:session:fromFile:)`

Initiates an upload request from a file.
```

--------------------------------

### Add Arachne Dependency to Package.swift

Source: https://github.com/artemisia-absynthium/arachne/blob/main/README.md

Include Arachne as a dependency in your Swift Package Manager `Package.swift` file to manage project dependencies.

```swift
.package(url: "https://github.com/artemisia-absynthium/arachne.git", .upToNextMajor(from: "0.6.1"))
```

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