URLRouter.swift

@objc class URLRouter: URLProtocol, URLSessionDataDelegate, URLSessionTaskDelegate {
    
    // TODO: This is synchronisyng only write access, which might be inadequate in many cases
    // Need to be replaced with proper full generic implementation of synchronized collection
    private (set) var moduleQueue = DispatchQueue(label: "com.tandem.module.queue")
    
    // MARK: URLProtocol methods overriding
    
    override class func canInit(with task: URLSessionTask) -> Bool {
        
        // Check if there's internal app schema that matches the one in the URL
        guard let url = task.originalRequest?.url,
            url.containsInAppSchema() else {
                return false
        }
        
        // Check if there's a path in the module that matches the one in the URL
        guard let module = ApplicationRouter.shared.instantiatedModules.filter({ $0.route == task.originalRequest?.url?.host }).first,
            let _ = module.paths.filter({ $0 == task.originalRequest?.url?.path }).first else {
                return false
        }
        return true
    }
    
    override class func canonicalRequest(for request: URLRequest) -> URLRequest {
        return request
    }
    
    
    override func startLoading() {
        
        guard let url = request.url else {
            return
        }
        
        ApplicationRouter.shared.open(url: url) { (response, data, urlResponse, error) in
            
            // TODO: Calling URLSessionDataDelegate methods to return the response
        }
    }
    
    override func stopLoading() {
    }
}