Add server status

Sources/App/configure.swift

@@ -1,4 +1,5 @@
 import Vapor
+import Clairvoyant
 
 var deviceManager: DeviceManager!
 
@@ -12,10 +13,23 @@ public func configure(_ app: Application) throws {
     let storageFolder = URL(fileURLWithPath: app.directory.resourcesDirectory)
     let logFolder = storageFolder.appendingPathComponent("logs")
 
+    let accessManager = AccessTokenManager([])
+    let monitor = MetricObserver(
+        logFolder: logFolder,
+        accessManager: accessManager,
+        logMetricId: "sesame.log")
+    MetricObserver.standard = monitor
+
+    let status = Metric<ServerStatus>("sesame.status")
+    status.update(.initializing)
+
+    monitor.registerRoutes(app)
 
     let configUrl = storageFolder.appendingPathComponent("config.json")
     let config = try Config(loadFrom: configUrl)
 
+    config.authenticationTokens.map { $0.data(using: .utf8)! }.forEach(accessManager.add)
+
     app.http.server.configuration.port = config.port
 
     let keyFile = storageFolder.appendingPathComponent(config.keyFileName)
@@ -30,6 +44,8 @@ public func configure(_ app: Application) throws {
             deviceManager.removeDeviceConnection()
         }
     }
+
+    status.update(.nominal)
 }
 
 private func loadKeys(at url: URL) throws -> (deviceKey: Data, remoteKey: Data) {