Add routes and configuration

Sources/App/configure.swift

@@ -1,10 +1,132 @@
 import Vapor
 
+private var eventLogHandle: FileHandle?
+
+private var registeredGuests = Set<String>()
+
+private var declinedGuests = Set<String>()
+
+private var guestListPath: URL!
+
+private var declinedListPath: URL!
+
+let df: DateFormatter = {
+    let df = DateFormatter()
+    df.dateFormat = "dd.MM. HH:mm"
+    return df
+}()
+
+
+func add(guest: String) -> String {
+    registeredGuests.insert(guest)
+    declinedGuests.remove(guest)
+    defer { saveLists() }
+    return log(event: "\(guest) registered")
+}
+
+func remove(guest: String) -> String {
+    registeredGuests.remove(guest)
+    declinedGuests.insert(guest)
+    defer { saveLists() }
+    return log(event: "\(guest) declined")
+}
+
+private func saveLists() {
+    saveList(registeredGuests, named: "guest", to: guestListPath)
+    saveList(declinedGuests, named: "declined", to: declinedListPath)
+}
+
+private func saveList(_ set: Set<String>, named name: String, to url: URL) {
+    guard let list = set.sorted().joined(separator: "\n").data(using: .utf8) else {
+        print("Failed to save \(name) list, no data")
+        return
+    }
+    do {
+        try list.write(to: url)
+        print("Saved \(name) list with \(set.count) entries")
+    } catch {
+        print("Failed to write \(name) list: \(error)")
+    }
+}
+
+private func loadList(from url: URL) throws -> Set<String> {
+    let users = try String(contentsOf: url)
+        .split(separator: "\n")
+        .map { $0.trimmingCharacters(in: .whitespacesAndNewlines) }
+        .filter { !$0.isEmpty }
+    print("Loaded list \(url.path) (\(users.count) entries)")
+    return .init(users)
+}
+
+private func log(event: String) -> String {
+    guard let handle = eventLogHandle else {
+        return "No handle"
+    }
+    let date = Date()
+    let dateString = df.string(from: date)
+    guard let entry = "[\(dateString)] \(event)\n".data(using: .utf8) else {
+        return "Invalid name"
+    }
+    guard #available(macOS 10.15.4, *) else {
+        handle.write(entry)
+        handle.synchronizeFile()
+        return "Success"
+    }
+    do {
+        try handle.write(contentsOf: entry)
+        handle.synchronizeFile()
+        return "Success"
+    } catch {
+        return "Save failed"
+    }
+}
+
+private func createFileIfNeeded(at path: URL) throws {
+    guard !FileManager.default.fileExists(atPath: path.path) else {
+        return
+    }
+    try Data().write(to: path)
+}
+
 // configures your application
 public func configure(_ app: Application) throws {
     // uncomment to serve files from /Public folder
     // app.middleware.use(FileMiddleware(publicDirectory: app.directory.publicDirectory))
+    app.http.server.configuration.port = 9001
+    
+    // let eventLog = app.directory.publicDirectory + "events.txt"
+    // let guestList = app.directory.publicDirectory + "registered.txt"
+    // let declinedList = app.directory.publicDirectory + "declined.txt"
+    let eventLog = "/blog/site/lists/events.txt"
+    let guestList = "/blog/site/lists/registered.txt"  
+    let declinedList = "/blog/site/lists/declined.txt"
+
+    let eventLogPath = URL(fileURLWithPath: eventLog)
+    guestListPath = URL(fileURLWithPath: guestList)
+    declinedListPath = URL(fileURLWithPath: declinedList)
+    
+    // Create the files
+    try createFileIfNeeded(at: eventLogPath)
+    try createFileIfNeeded(at: guestListPath)
+    try createFileIfNeeded(at: declinedListPath)
+    
+    // Create handle to write events
+    eventLogHandle = FileHandle(forWritingAtPath: eventLog)
+    if #available(macOS 10.15.4, *) {
+        try eventLogHandle?.seekToEnd()
+    } else {
+        // Fallback on earlier versions
+        eventLogHandle?.seekToEndOfFile()
+    }
+    
+    registeredGuests = try loadList(from: guestListPath)
+    declinedGuests = try loadList(from: declinedListPath)
     
     // register routes
     try routes(app)
+    
+    let date = Date()
+    let dateString = df.string(from: date)
+    print("[\(dateString)] Server started: \(registeredGuests.count) registered, \(declinedGuests.count) declined, event log open: \(eventLogHandle != nil)")
+
 }

Sources/App/routes.swift

@@ -1,11 +1,34 @@
 import Vapor
 
+private func register(_ req: Request, isAttending: Bool) -> String {
+    guard let name = req.body.string?.trimmingCharacters(in: .whitespacesAndNewlines) else {
+        return "No Name"
+    }
+    if isAttending {
+        return add(guest: name)
+    } else {
+        return remove(guest: name)
+    }
+}
+
 func routes(_ app: Application) throws {
     app.get { req in
         return "It works!"
     }
 
-    app.get("hello") { req -> String in
+    app.get("festival", "api", "hello") { req in
-        return "Hello, world!"
+        return "It works!"
+    }
+
+    app.get("hello") { req in
+        return "It works!"
+    }
+
+    app.post("festival", "api", "register") { req -> String in
+        register(req, isAttending: true)
+    }
+    
+    app.post("festival", "api", "decline") { req -> String in
+        register(req, isAttending: false)
     }
 }