SRNetworkManager 🚀

SRNetworkManager is a powerful and flexible networking layer for Swift applications. It provides a generic, protocol-oriented approach to handling API requests, supporting both Combine and async/await paradigms. This package is designed to be easy to use, highly customizable, and fully compatible with Swift 6 and the Sendable protocol.

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🎯 Features

• 🔗 Generic API Client for various types of network requests
• 🧩 Protocol-Oriented Design for easy customization and extensibility
• ⚡ Support for Combine & async/await
• 🛡️ Robust Error Handling with custom error types
• 🔄 Retry Mechanism for failed requests
• 📤 File Upload Support with progress tracking
• 🔧 Flexible Parameter Encoding (URL & JSON)
• 🧾 Comprehensive Logging System
• 📦 MIME Type Detection for file uploads
• 🔒 Thread-Safe Design with Sendable protocol support
• 🚀 Swift 6 Compatibility

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📋 Requirements

• iOS 13.0+ / macOS 10.15+
• Swift 5.5+
• Xcode 13.0+

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📦 Installation

Swift Package Manager (SPM)

Add the following to your Package.swift file:

dependencies: [
    .package(url: "https://github.com/siamakrostami/SRNetworkManager.git", from: "1.0.0")
]

Or use Xcode:

1. Go to File > Add Packages...
2. Search for:

   https://github.com/siamakrostami/SRNetworkManager.git
   

3. Select the latest version and add it to your project.

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📚 Usage

Below are examples of how to use SRNetworkManager for network requests as well as network monitoring and VPN detection.

1. Network Requests

Initializing APIClient

let client = APIClient() // Basic initialization with default settings

let client = APIClient(qos: .background) // Initialization with custom QoS (Quality of Service)

let client = APIClient(logLevel: .verbose) // Initialization with custom log level

let client = APIClient(qos: .userInitiated, logLevel: .standard) // With QoS + log level

let client = APIClient(retryHandler: MyCustomRetryHandler()) // With a custom retry handler

let client = APIClient(decoder: MyCustomDecoder()) // With a custom decoder

Defining an API Endpoint

struct UserAPI: NetworkRouter {
    typealias Parameters = UserParameters
    typealias QueryParameters = UserQueryParameters

    var baseURLString: String { "https://api.example.com" }
    var method: RequestMethod? { .get }
    var path: String { "/users" }
    var headers: [String: String]? { 
        HeaderHandler.shared
            .addAcceptHeaders(type: .applicationJson)
            .addContentTypeHeader(type: .applicationJson)
            .build() 
    }
    var params: Parameters? { UserParameters(id: 123) }
    var queryParams: QueryParameters? { UserQueryParameters(includeDetails: true) }
}

Or using a repository-style approach:

public protocol SampleRepositoryProtocols: Sendable {
    func getInvoice(documentID: String) -> AnyPublisher<SomeModel, NetworkError>
    func getInvoice(documentID: String) async throws -> SomeModel
    
    func getReceipt(transactionId: String) -> AnyPublisher<SomeModel, NetworkError>
    func getReceipt(transactionId: String) async throws -> SomeModel
}

public final class SampleRepository: Sendable {
    // MARK: Lifecycle

    public init(client: APIClient) {
        self.client = client
    }

    // MARK: Private

    private let client: APIClient
}

extension SampleRepository {
    enum Router: NetworkRouter {
        case getInvoice(documentID: String)
        case getReceipt(transactionId: String)

        var path: String {
            switch self {
            case .getInvoice(let documentID):
                return "your/path/\(documentID)"
            case .getReceipt(let transactionId):
                return "your/path/\(transactionId)"
            }
        }

        var method: RequestMethod? {
            switch self {
            case .getInvoice:
                return .get
            case .getReceipt:
                return .post
            }
        }

        var headers: [String: String]? {
            var handler = HeaderHandler.shared
                .addAuthorizationHeader()
                .addAcceptHeaders(type: .applicationJson)
                .addDeviceId()
            
            switch self {
            case .getInvoice:
                break
            case .getReceipt:
                handler = handler.addContentTypeHeader(type: .applicationJson)
            }
            
            return handler.build()
        }
        
        var queryParams: SampleRepositoryQueryParamModel? {
            switch self {
            case .getInvoice(let trxId):
                return SampleRepositoryQueryParamModel(trxId: trxId)
            case .getReceipt(let transactionId):
                return SampleRepositoryQueryParamModel(trxId: transactionId)
            }
        }
        
        var params: SampleRepositoryQueryParamModel? {
            switch self {
            case .getInvoice(let documentID):
                return SampleRepositoryQueryParamModel(
                    documentId: documentID,
                    stepId: "Some Id",
                    subStepId: "Some Id"
                )
            case .getReceipt:
                return nil
            }
        }
    }
}

extension SampleRepository: SampleRepositoryProtocols {
    public func getInvoice(documentID: String) -> AnyPublisher<SomeModel, NetworkError> {
        client.request(Router.getInvoice(documentID: documentID))
    }
    
    public func getInvoice(documentID: String) async throws -> SomeModel {
        try await client.asyncRequest(Router.getInvoice(documentID: documentID))
    }
    
    public func getReceipt(transactionId: String) -> AnyPublisher<SomeModel, NetworkError> {
        client.request(Router.getReceipt(transactionId: transactionId))
    }
    
    public func getReceipt(transactionId: String) async throws -> SomeModel {
        try await client.asyncRequest(Router.getReceipt(transactionId: transactionId))
    }
}

public struct SampleRepositoryQueryParamModel: Codable, Sendable {
    public init(documentId: String? = nil,
                stepId: String? = nil,
                subStepId: String? = nil,
                trxId: String? = nil) {
        self.documentId = documentId
        self.stepId = stepId
        self.subStepId = subStepId
        self.trxId = trxId
    }
    
    public let documentId: String?
    public let stepId: String?
    public let subStepId: String?
    public let trxId: String?
}

Making a Request (async/await) ⚡

Task {
    do {
        let userResponse: UserResponse = try await client.asyncRequest(UserAPI())
        print("Received user: \(userResponse)")
    } catch {
        print("Request failed: \(error)")
    }
}

Making a Request (Combine) 🔗

let apiClient = APIClient()

apiClient.request(UserAPI())
    .sink(receiveCompletion: { completion in
        switch completion {
        case .finished:
            print("Request completed successfully")
        case .failure(let error):
            print("Request failed with error: \(error)")
        }
    }, receiveValue: { (response: UserResponse) in
        print("Received user: \(response)")
    })
    .store(in: &cancellables)

File Upload 📤

let apiClient = APIClient()

let fileData = // ... your file data ...
let endpoint = UploadAPI()

apiClient.uploadRequest(endpoint, withName: "file", data: fileData) { progress in
    print("Upload progress: \(progress)")
}
.sink(receiveCompletion: { completion in
    // Handle completion
}, receiveValue: { (response: UploadResponse) in
    print("Upload completed: \(response)")
})
.store(in: &cancellables)

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2. Network Monitoring

SRNetworkManager provides a simple utility to monitor network status via NWPathMonitor, exposing:

• A Combine publisher for real-time updates
• An async/await stream if you prefer Swift concurrency
• VPN detection integrated by default (but can be bypassed)

Here’s a sample usage:

import Combine

var cancellables = Set<AnyCancellable>()

// Instantiate the network monitor (optionally disabling VPN detection)
let network = NetworkMonitor(shouldDetectVpnAutomatically: true)

// Start monitoring
network.startMonitoring()

// 1) Combine subscription
network.status
    .sink { status in
        switch status {
        case .disconnected:
            debugPrint("disconnected")
        case .connected(let networkType):
            switch networkType {
            case .wifi:
                debugPrint("wifi")
            case .cellular:
                debugPrint("cellular")
            case .ethernet:
                debugPrint("ethernet")
            case .other:
                debugPrint("other")
            case .vpn:
                debugPrint("vpn")
            }
        }
    }
    .store(in: &cancellables)

// 2) Async Stream
Task {
    let statusStream = network.statusStream()
    for await status in statusStream {
        switch status {
        case .disconnected:
            debugPrint("Async disconnected")
        case .connected(let type):
            debugPrint("Async connected: \(type)")
        }
    }
}

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3. VPN Checking

SRNetworkManager includes a standalone VPNChecker class that checks whether a VPN is active. It inspects the system’s proxy settings for known VPN interfaces. You can use this independently if you wish:

let checker = VPNChecker() // Normal usage
let isVPNActive = checker.isVPNActive()
print("VPN Active? \(isVPNActive)")

If you want to bypass VPN checking (e.g., in debug mode), you can initialize with:

let checker = VPNChecker(shouldBypassVpnCheck: true)

This will always return false for isVPNActive().

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🔧 Customization

Retry Handling 🔄

struct CustomRetryHandler: RetryHandler {
    // MARK: Lifecycle

    init(numberOfRetries: Int) {
        self.numberOfRetries = numberOfRetries
    }

    // MARK: Public

    let numberOfRetries: Int

    func shouldRetry(request: URLRequest, error: NetworkError) -> Bool {
        // Implement your logic here
    }

    func modifyRequestForRetry(client: APIClient, request: URLRequest, error: NetworkError) -> (URLRequest, NetworkError?) {
        // Implement your logic here
    }
}

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📱 Sample SwiftUI App

A sample SwiftUI app is available to help you get started with SRNetworkManager in a real-world scenario.

Features of the Sample App:

• Setup and usage of APIClient
• Defining API endpoints using NetworkRouter
• Making network requests and handling responses in SwiftUI
• Basic error handling

Getting the Sample App:

1. Clone this repository.
2. Navigate to Example/SRNetworkManagerExampleApp.
3. Open SRNetworkManagerExampleApp.xcodeproj in Xcode.
4. Run the project.

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🤝 Contributing

We welcome contributions! Feel free to open issues and submit pull requests on GitHub.

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📄 License

SRNetworkManager is available under the MIT license. See the LICENSE file for more details.