feat: Adds SensorsService

Package.resolved

@@ -1,61 +1,87 @@
 {
-  "object": {
-    "pins": [
-      {
-        "package": "mqtt-nio",
-        "repositoryURL": "https://github.com/swift-server-community/mqtt-nio.git",
-        "state": {
-          "branch": null,
-          "revision": "ca8af7a30c4690456ce7de276cd0f037489ba707",
-          "version": "2.5.3"
-        }
-      },
-      {
-        "package": "swift-log",
-        "repositoryURL": "https://github.com/apple/swift-log.git",
-        "state": {
-          "branch": null,
-          "revision": "5d66f7ba25daf4f94100e7022febf3c75e37a6c7",
-          "version": "1.4.2"
-        }
-      },
-      {
-        "package": "swift-nio",
-        "repositoryURL": "https://github.com/apple/swift-nio",
-        "state": {
-          "branch": null,
-          "revision": "6aa9347d9bc5bbfe6a84983aec955c17ffea96ef",
-          "version": "2.33.0"
-        }
-      },
-      {
-        "package": "swift-nio-ssl",
-        "repositoryURL": "https://github.com/apple/swift-nio-ssl.git",
-        "state": {
-          "branch": null,
-          "revision": "b5260a31c2a72a89fa684f5efb3054d8725a2316",
-          "version": "2.18.0"
-        }
-      },
-      {
-        "package": "swift-nio-transport-services",
-        "repositoryURL": "https://github.com/apple/swift-nio-transport-services.git",
-        "state": {
-          "branch": null,
-          "revision": "8ab824b140d0ebcd87e9149266ddc353e3705a3e",
-          "version": "1.11.4"
-        }
-      },
-      {
-        "package": "swift-psychrometrics",
-        "repositoryURL": "https://github.com/swift-psychrometrics/swift-psychrometrics",
-        "state": {
-          "branch": null,
-          "revision": "03573545c3750b406921eb22a9575c8062beef88",
-          "version": "0.1.2"
-        }
+  "originHash" : "869c04e4de5c59d3c7c00851dffa2bfde39aa29dc5be3cbbb759ad950fffd706",
+  "pins" : [
+    {
+      "identity" : "mqtt-nio",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/swift-server-community/mqtt-nio.git",
+      "state" : {
+        "revision" : "ca8af7a30c4690456ce7de276cd0f037489ba707",
+        "version" : "2.5.3"
       }
-    ]
-  },
-  "version": 1
+    },
+    {
+      "identity" : "swift-async-algorithms",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-async-algorithms.git",
+      "state" : {
+        "revision" : "5c8bd186f48c16af0775972700626f0b74588278",
+        "version" : "1.0.2"
+      }
+    },
+    {
+      "identity" : "swift-collections",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-collections.git",
+      "state" : {
+        "revision" : "671108c96644956dddcd89dd59c203dcdb36cec7",
+        "version" : "1.1.4"
+      }
+    },
+    {
+      "identity" : "swift-log",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-log.git",
+      "state" : {
+        "revision" : "9cb486020ebf03bfa5b5df985387a14a98744537",
+        "version" : "1.6.1"
+      }
+    },
+    {
+      "identity" : "swift-nio",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-nio",
+      "state" : {
+        "revision" : "6aa9347d9bc5bbfe6a84983aec955c17ffea96ef",
+        "version" : "2.33.0"
+      }
+    },
+    {
+      "identity" : "swift-nio-ssl",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-nio-ssl.git",
+      "state" : {
+        "revision" : "b5260a31c2a72a89fa684f5efb3054d8725a2316",
+        "version" : "2.18.0"
+      }
+    },
+    {
+      "identity" : "swift-nio-transport-services",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-nio-transport-services.git",
+      "state" : {
+        "revision" : "8ab824b140d0ebcd87e9149266ddc353e3705a3e",
+        "version" : "1.11.4"
+      }
+    },
+    {
+      "identity" : "swift-psychrometrics",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/swift-psychrometrics/swift-psychrometrics",
+      "state" : {
+        "revision" : "03573545c3750b406921eb22a9575c8062beef88",
+        "version" : "0.1.2"
+      }
+    },
+    {
+      "identity" : "swift-service-lifecycle",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/swift-server/swift-service-lifecycle.git",
+      "state" : {
+        "revision" : "f70b838872863396a25694d8b19fe58bcd0b7903",
+        "version" : "2.6.2"
+      }
+    }
+  ],
+  "version" : 3
 }

Package.swift

@@ -5,7 +5,7 @@ import PackageDescription
 let package = Package(
   name: "dewPoint-controller",
   platforms: [
-    .macOS(.v12)
+    .macOS(.v14)
   ],
   products: [
     .executable(name: "dewPoint-controller", targets: ["dewPoint-controller"]),
@@ -14,12 +14,13 @@ let package = Package(
     .library(name: "EnvVars", targets: ["EnvVars"]),
     .library(name: "Models", targets: ["Models"]),
     .library(name: "Client", targets: ["Client"]),
-    .library(name: "ClientLive", targets: ["ClientLive"]),
+    .library(name: "ClientLive", targets: ["ClientLive"])
   ],
   dependencies: [
     .package(url: "https://github.com/swift-server-community/mqtt-nio.git", from: "2.0.0"),
     .package(url: "https://github.com/apple/swift-nio", from: "2.0.0"),
-    .package(url: "https://github.com/swift-psychrometrics/swift-psychrometrics", from: "0.1.0")
+    .package(url: "https://github.com/swift-psychrometrics/swift-psychrometrics", from: "0.1.0"),
+    .package(url: "https://github.com/swift-server/swift-service-lifecycle.git", from: "2.3.0")
   ],
   targets: [
     .executableTarget(
@@ -53,7 +54,7 @@ let package = Package(
         "EnvVars",
         "Client",
         "Models",
-        .product(name: "MQTTNIO", package: "mqtt-nio"),
+        .product(name: "MQTTNIO", package: "mqtt-nio")
       ]
     ),
     .target(
@@ -63,7 +64,7 @@ let package = Package(
     .target(
       name: "Models",
       dependencies: [
-        .product(name: "Psychrometrics", package: "swift-psychrometrics"),
+        .product(name: "Psychrometrics", package: "swift-psychrometrics")
       ]
     ),
     .target(
@@ -80,7 +81,8 @@ let package = Package(
       dependencies: [
         "Client",
         "EnvVars",
-        .product(name: "MQTTNIO", package: "mqtt-nio")
+        .product(name: "MQTTNIO", package: "mqtt-nio"),
+        .product(name: "ServiceLifecycle", package: "swift-service-lifecycle")
       ]
     ),
     .testTarget(
@@ -95,6 +97,6 @@ let package = Package(
       dependencies: [
         "Models"
       ]
-    ),
+    )
   ]
 )

Sources/ClientLive/SensorsClient.swift

@@ -4,6 +4,7 @@ import Models
 import MQTTNIO
 import NIO
 import Psychrometrics
+import ServiceLifecycle
 
 // TODO: Pass in eventLoopGroup and MQTTClient.
 public actor SensorsClient {
@@ -65,14 +66,22 @@ public actor SensorsClient {
   }
 
   public func start() async throws {
-    do {
-      try await subscribeToSensors()
-      try await addSensorListeners()
-      logger.debug("Begin listening to sensors...")
-    } catch {
-      logger.trace("Error:\n\(error)")
-      throw error
+    await withGracefulShutdownHandler {
+      await withThrowingTaskGroup(of: Void.self) { group in
+        group.addTask { try await self.subscribeToSensors() }
+        group.addTask { try await self.addSensorListeners() }
+      }
+    } onGracefulShutdown: {
+      Task { await self.shutdown() }
     }
+//     do {
+//       try await subscribeToSensors()
+//       try await addSensorListeners()
+//       logger.debug("Begin listening to sensors...")
+//     } catch {
+//       logger.trace("Error:\n(error)")
+//       throw error
+//     }
   }
 
   public func shutdown() async {
@@ -88,6 +97,48 @@ public actor SensorsClient {
     }
   }
 
+  private func _addSensorListeners(qos _: MQTTQoS = .exactlyOnce) async throws {
+    // try await withThrowingDiscardingTaskGroup { group in
+    // group.addTask { try await self.subscribeToSensors(qos: qos) }
+
+    for await result in client.createPublishListener() {
+      switch result {
+      case let .failure(error):
+        logger.trace("Error:\n\(error)")
+      case let .success(value):
+        let topic = value.topicName
+        logger.trace("Received new value for topic: \(topic)")
+        if topic.contains("temperature") {
+          // do something.
+          var buffer = value.payload
+          guard let temperature = Temperature(buffer: &buffer) else {
+            logger.trace("Decoding error for topic: \(topic)")
+            throw DecodingError()
+          }
+          try sensors.update(topic: topic, keyPath: \.temperature, with: temperature)
+          // group.addTask {
+          Task {
+            try await self.publishUpdates()
+          }
+
+        } else if topic.contains("humidity") {
+          var buffer = value.payload
+          // Decode and update the temperature value
+          guard let humidity = RelativeHumidity(buffer: &buffer) else {
+            logger.debug("Failed to decode humidity from buffer: \(buffer)")
+            throw DecodingError()
+          }
+          try sensors.update(topic: topic, keyPath: \.humidity, with: humidity)
+          //      group.addTask {
+          Task {
+            try await self.publishUpdates()
+          }
+        }
+        //   }
+      }
+    }
+  }
+
   func addSensorListeners(qos: MQTTQoS = .exactlyOnce) async throws {
     try await subscribeToSensors(qos: qos)
     client.addPublishListener(named: "SensorsClient") { result in
@@ -138,7 +189,7 @@ public actor SensorsClient {
     )
   }
 
-  func publishUpdates() async throws {
+  private func publishUpdates() async throws {
     for sensor in sensors.filter(\.needsProcessed) {
       try await publish(double: sensor.dewPoint?.rawValue, to: sensor.topics.dewPoint)
       try await publish(double: sensor.enthalpy?.rawValue, to: sensor.topics.enthalpy)

Sources/ClientLive/SensorsService.swift

@@ -0,0 +1,131 @@
+import Foundation
+import Logging
+@preconcurrency import Models
+@preconcurrency import MQTTNIO
+import NIO
+import Psychrometrics
+import ServiceLifecycle
+
+public actor SensorsService: Service {
+  private var sensors: [TemperatureAndHumiditySensor]
+  private let client: MQTTClient
+  var logger: Logger { client.logger }
+
+  public init(
+    client: MQTTClient,
+    sensors: [TemperatureAndHumiditySensor]
+  ) {
+    self.client = client
+    self.sensors = sensors
+  }
+
+  public func run() async throws {
+    guard client.isActive() else {
+      throw MQTTClientNotConnected()
+    }
+    try await withThrowingDiscardingTaskGroup { group in
+      group.addTask { try await self.subscribeToSensors() }
+      for await result in client.createPublishListener().cancelOnGracefulShutdown() {
+        group.addTask {
+          try await self.handleResult(result)
+        }
+      }
+    }
+  }
+
+  private func handleResult(
+    _ result: Result<MQTTPublishInfo, any Error>
+  ) async throws {
+    switch result {
+    case let .failure(error):
+      logger.debug("Failed receiving sensor: \(error)")
+      throw error
+    case let .success(value):
+      // do something.
+      let topic = value.topicName
+      logger.trace("Received new value for topic: \(topic)")
+      if topic.contains("temperature") {
+        // do something.
+        var buffer = value.payload
+        guard let temperature = Temperature(buffer: &buffer) else {
+          logger.trace("Decoding error for topic: \(topic)")
+          throw DecodingError()
+        }
+        try sensors.update(topic: topic, keyPath: \.temperature, with: temperature)
+        try await publishUpdates()
+
+      } else if topic.contains("humidity") {
+        var buffer = value.payload
+        // Decode and update the temperature value
+        guard let humidity = RelativeHumidity(buffer: &buffer) else {
+          logger.debug("Failed to decode humidity from buffer: \(buffer)")
+          throw DecodingError()
+        }
+        try sensors.update(topic: topic, keyPath: \.humidity, with: humidity)
+        try await publishUpdates()
+      }
+    }
+  }
+
+  private func subscribeToSensors() async throws {
+    for sensor in sensors {
+      _ = try await client.subscribe(to: [
+        MQTTSubscribeInfo(topicFilter: sensor.topics.temperature, qos: .atLeastOnce),
+        MQTTSubscribeInfo(topicFilter: sensor.topics.humidity, qos: .atLeastOnce)
+      ])
+      logger.debug("Subscribed to sensor: \(sensor.location)")
+    }
+  }
+
+  private func publish(double: Double?, to topic: String) async throws {
+    guard let double else { return }
+    let rounded = round(double * 100) / 100
+    logger.debug("Publishing \(rounded), to: \(topic)")
+    try await client.publish(
+      to: topic,
+      payload: ByteBufferAllocator().buffer(string: "\(rounded)"),
+      qos: .exactlyOnce,
+      retain: true
+    )
+  }
+
+  private func publishUpdates() async throws {
+    for sensor in sensors.filter(\.needsProcessed) {
+      try await publish(double: sensor.dewPoint?.rawValue, to: sensor.topics.dewPoint)
+      try await publish(double: sensor.enthalpy?.rawValue, to: sensor.topics.enthalpy)
+      try sensors.hasProcessed(sensor)
+    }
+  }
+
+}
+
+// MARK: - Helpers
+
+struct MQTTClientNotConnected: Error {}
+
+private extension TemperatureAndHumiditySensor.Topics {
+  func contains(_ topic: String) -> Bool {
+    temperature == topic || humidity == topic
+  }
+}
+
+private extension Array where Element == TemperatureAndHumiditySensor {
+
+  mutating func update<V>(
+    topic: String,
+    keyPath: WritableKeyPath<TemperatureAndHumiditySensor, V>,
+    with value: V
+  ) throws {
+    guard let index = firstIndex(where: { $0.topics.contains(topic) }) else {
+      throw NotFoundError()
+    }
+    self[index][keyPath: keyPath] = value
+  }
+
+  mutating func hasProcessed(_ sensor: TemperatureAndHumiditySensor) throws {
+    guard let index = firstIndex(where: { $0.id == sensor.id }) else {
+      throw NotFoundError()
+    }
+    self[index].needsProcessed = false
+  }
+}

Sources/DewPointEnvironment/Environment.swift

@@ -3,6 +3,8 @@ import EnvVars
 import Models
 import MQTTNIO
 
+// TODO: Remove
+
 public struct DewPointEnvironment {
 
   public var envVars: EnvVars

Sources/EnvVars/EnvVars.swift

@@ -1,5 +1,7 @@
 import Foundation
 
+// TODO: Move to Models
+
 /// Holds common settings for connecting to your MQTT broker.  The default values can be used,
 /// they can be loaded from the shell environment, or from a file located in the root directory.
 ///

Tests/ClientTests/SensorsClientTests.swift

@@ -7,7 +7,7 @@ import NIO
 import Psychrometrics
 import XCTest
 
-final class AsyncClientTests: XCTestCase {
+final class SensorsClientTests: XCTestCase {
 
   static let hostname = ProcessInfo.processInfo.environment["MOSQUITTO_SERVER"] ?? "localhost"
 
@@ -35,6 +35,66 @@ final class AsyncClientTests: XCTestCase {
     await client.shutdown()
   }
 
+  func testSensorService() async throws {
+    let client = createClient(identifier: "testSensorService")
+    let mqtt = await client.client
+    let sensor = TemperatureAndHumiditySensor(location: .mixedAir, units: .metric)
+    let publishInfo = PublishInfoContainer(topicFilters: [
+      sensor.topics.dewPoint,
+      sensor.topics.enthalpy
+    ])
+    let service = SensorsService(client: mqtt, sensors: [sensor])
+
+    // fix to connect the mqtt client.
+    await client.connect()
+    let task = Task { try await service.run() }
+
+    _ = try await mqtt.subscribe(to: [
+      .init(topicFilter: sensor.topics.dewPoint, qos: .exactlyOnce),
+      .init(topicFilter: sensor.topics.enthalpy, qos: .exactlyOnce)
+    ])
+
+    let listener = mqtt.createPublishListener()
+    Task {
+      for await result in listener {
+        switch result {
+        case let .failure(error):
+          XCTFail("\(error)")
+        case let .success(value):
+          await publishInfo.addPublishInfo(value)
+        }
+      }
+    }
+
+    try await mqtt.publish(
+      to: sensor.topics.temperature,
+      payload: ByteBufferAllocator().buffer(string: "75.123"),
+      qos: .exactlyOnce,
+      retain: true
+    )
+
+    try await Task.sleep(for: .seconds(1))
+
+    // XCTAssert(client.sensors.first!.needsProcessed)
+//     let firstSensor = await client.sensors.first!
+//     XCTAssertEqual(firstSensor.temperature, .init(75.123, units: .celsius))
+
+    try await mqtt.publish(
+      to: sensor.topics.humidity,
+      payload: ByteBufferAllocator().buffer(string: "50"),
+      qos: .exactlyOnce,
+      retain: true
+    )
+
+    try await Task.sleep(for: .seconds(1))
+
+    XCTAssertEqual(publishInfo.info.count, 2)
+
+    // fix to shutdown the mqtt client.
+    task.cancel()
+    await client.shutdown()
+  }
+
   func testSensorCapturesPublishedState() async throws {
     let client = createClient(identifier: "testSensorCapturesPublishedState")
     let mqtt = await client.client