Added logging to the ArchiveController controller in the library target.

Library/Sources/Internal/Controllers/ArchiveController.swift

@@ -1,4 +1,5 @@
 import Hummingbird
+import Logging
 
 /// A controller type that provides information about the *DocC* archives containers.
 struct ArchiveController<Context: RequestContext> {
@@ -7,6 +8,7 @@ struct ArchiveController<Context: RequestContext> {
     
     private let archivesPath: String
     private let fileService: any FileServicing
+    private let logger: Logger
 
     // MARK: Initialisers
     
@@ -14,12 +16,15 @@ struct ArchiveController<Context: RequestContext> {
     /// - Parameters:
     ///   - archivesPath: A path in the local file system where the *DocC* archive contained are located.
     ///   - fileService: A service that interfaces with the local file system.
+    ///   - logger: A service that interfaces with the logging system.
     init(
         _ archivesPath: String,
-        fileService: any FileServicing = FileService()
+        fileService: any FileServicing = FileService(),
+        logger: Logger
     ) {
         self.archivesPath = archivesPath
         self.fileService = fileService
+        self.logger = logger
     }
     
     // MARK: Functions
@@ -49,19 +54,89 @@ private extension ArchiveController {
                 .map { $0.dropLast(String.suffixArchive.count) }
                 .map(String.init)
                 .sorted { $0 < $1 }
+            let archiveList: ArchiveList = .init(nameArchives)
 
-            return .init(nameArchives)
+            defer {
+                logger.debug(
+                    "The codable response returned: \(String(describing: archiveList))",
+                    metadata: .metadata(
+                        context: context,
+                        request: request,
+                        statusCode: .ok
+                    ),
+                    source: .source
+                )
+            }
+
+            return archiveList
         } catch .folderNotFound {
+            defer {
+                logger.error(
+                    "The resource has not been found.",
+                    metadata: .metadata(
+                        context: context,
+                        request: request,
+                        statusCode: .notFound
+                    ),
+                    source: .source
+                )
+            }
+
             throw .init(.notFound)
         } catch .folderPathEmpty, .folderNotDirectory {
-            throw .init(.unprocessableContent)
+            defer {
+                logger.error(
+                    "The folder for the resource has not been located.",
+                    metadata: .metadata(
+                        context: context,
+                        request: request,
+                        statusCode: .notAcceptable
+                    ),
+                    source: .source
+                )
+            }
+
+            throw .init(.notAcceptable)
         } catch {
+            defer {
+                logger.error(
+                    "The request has issues.",
+                    metadata: .metadata(
+                        context: context,
+                        request: request,
+                        statusCode: .badRequest
+                    ),
+                    source: .source
+                )
+            }
+
             throw .init(.badRequest)
         }
     }
     
 }
 
+// MARK: - Logger,Metadata+Functions
+
+private extension Logger.Metadata {
+    
+    // MARK: Functions
+
+    static func metadata<Context: RequestContext>(
+        context: Context,
+        request: Request,
+        statusCode: HTTPResponse.Status
+    ) -> Logger.Metadata {
+        return [
+            "hb.request.id": "\(context.id)",
+            "hb.request.method": "\(request.method.rawValue)",
+            "hb.request.path": "\(request.uri.path)",
+            "hb.request.status": "\(statusCode.code)"
+        ]
+    }
+    
+}
+
 // MARK: - RouterPath+Constants
 
 private extension RouterPath {
@@ -71,5 +146,6 @@ private extension RouterPath {
 // MARK: - String+Constants
 
 private extension String {
+    static let source = "ArchiveController"
     static let suffixArchive: String = ".doccarchive"
 }

Library/Sources/Public/Builders/AppBuilder.swift

@@ -82,7 +82,11 @@ private extension AppBuilder {
             DocCMiddleware(archivesPath)
         }
         
-        ArchiveController(archivesPath).register(to: router)
+        ArchiveController(
+            archivesPath,
+            logger: logger
+        )
+        .register(to: router)
 
         return router
     }