Add dotnet activities for train interface.

enterprise/.gitignore

@@ -0,0 +1,2 @@
+obj
+bin

enterprise/Activities/TrainActivities.cs

@@ -0,0 +1,40 @@
+using System.Net.Http.Json;
+using Temporalio.Activities;
+using TrainSearchWorker.Models;
+
+namespace TrainSearchWorker.Activities;
+
+public class TrainActivities
+{
+    private readonly HttpClient _client;
+
+    public TrainActivities(IHttpClientFactory clientFactory)
+    {
+        _client = clientFactory.CreateClient("TrainApi");
+    }
+
+    [Activity]
+    public async Task<List<Journey>> SearchTrains(SearchTrainsRequest request)
+    {
+        var response = await _client.GetAsync(
+            $"api/search?from={Uri.EscapeDataString(request.From)}" +
+            $"&to={Uri.EscapeDataString(request.To)}" +
+            $"&outbound_time={Uri.EscapeDataString(request.OutboundTime)}" +
+            $"&return_time={Uri.EscapeDataString(request.ReturnTime)}");
+
+        response.EnsureSuccessStatusCode();
+
+        return await response.Content.ReadFromJsonAsync<List<Journey>>() 
+            ?? throw new InvalidOperationException("Received null response from API");
+    }
+
+    [Activity]
+    public async Task<List<Journey>> BookTrains(BookTrainsRequest request)
+    {
+        var response = await _client.PostAsJsonAsync("api/book", request);
+        response.EnsureSuccessStatusCode();
+
+        return await response.Content.ReadFromJsonAsync<List<Journey>>()
+            ?? throw new InvalidOperationException("Received null response from API");
+    }
+}

enterprise/Models/BookTrainRequest.cs

@@ -0,0 +1,6 @@
+namespace TrainSearchWorker.Models;
+
+public record BookTrainsRequest
+{
+    public required string TrainIds { get; init; }
+}

enterprise/Models/Journey.cs

@@ -0,0 +1,12 @@
+namespace TrainSearchWorker.Models;
+
+public record Journey
+{
+    public required string Id { get; init; }
+    public required string Type { get; init; }
+    public required string Departure { get; init; }
+    public required string Arrival { get; init; }
+    public required string DepartureTime { get; init; }
+    public required string ArrivalTime { get; init; }
+    public required decimal Price { get; init; }
+}

enterprise/Models/SearchTrainsRequest.cs

@@ -0,0 +1,9 @@
+namespace TrainSearchWorker.Models;
+
+public record SearchTrainsRequest
+{
+    public required string From { get; init; }
+    public required string To { get; init; }
+    public required string OutboundTime { get; init; }
+    public required string ReturnTime { get; init; }
+}

enterprise/Program.cs

@@ -0,0 +1,52 @@
+using Microsoft.Extensions.DependencyInjection;
+using Temporalio.Client;
+using Temporalio.Worker;
+using TrainSearchWorker.Activities;
+
+var services = new ServiceCollection();
+
+// Add HTTP client
+services.AddHttpClient("TrainApi", client =>
+{
+    client.BaseAddress = new Uri("http://localhost:8080/");
+    client.DefaultRequestHeaders.Add("Accept", "application/json");
+});
+
+// Add activities
+services.AddScoped<TrainActivities>();
+
+var serviceProvider = services.BuildServiceProvider();
+
+// Create client
+var client = await TemporalClient.ConnectAsync(new()
+{
+    TargetHost = "localhost:7233",
+});
+
+// Create worker options
+var options = new TemporalWorkerOptions("agent-task-queue-legacy");
+
+// Register activities
+var activities = serviceProvider.GetRequiredService<TrainActivities>();
+options.AddActivity(activities.SearchTrains);
+options.AddActivity(activities.BookTrains);
+
+// Create and run worker
+var worker = new TemporalWorker(client, options);
+
+Console.WriteLine("Starting worker...");
+using var tokenSource = new CancellationTokenSource();
+Console.CancelKeyPress += (_, eventArgs) =>
+{
+    eventArgs.Cancel = true;
+    tokenSource.Cancel();
+};
+
+try 
+{
+    await worker.ExecuteAsync(tokenSource.Token);
+}
+catch (OperationCanceledException)
+{
+    Console.WriteLine("Worker shutting down...");
+}

enterprise/TrainSearchWorker.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Temporalio" Version="1.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Http" Version="8.0.0" />
+  </ItemGroup>
+</Project>

thirdparty/train_api.py

@@ -151,7 +151,7 @@ class TrainServer(BaseHTTPRequestHandler):
     def do_GET(self):
         parsed_url = urlparse(self.path)
 
-        if parsed_url.path == "/api/journeys":
+        if parsed_url.path == "/api/search":
             try:
                 params = parse_qs(parsed_url.query)
                 origin = params.get("from", [""])[0]
@@ -212,7 +212,7 @@ class TrainServer(BaseHTTPRequestHandler):
         parsed_url = urlparse(self.path)
 
         if parsed_url.path.startswith("/api/book/"):
-            journey_id = parsed_url.path.split("/")[-1]
+            train_ids = parsed_url.path.split("/")[-1].split(",")
             self.send_response(200)
             self.send_header("Content-Type", "application/json")
             self.end_headers()
@@ -224,7 +224,7 @@ class TrainServer(BaseHTTPRequestHandler):
             response = self.format_json(
                 {
                     "booking_reference": booking_ref,
-                    "journey_id": journey_id,
+                    "train_ids": train_ids,
                     "status": "confirmed",
                 }
             )

tools/__init__.py

@@ -1,7 +1,7 @@
 from .search_fixtures import search_fixtures
 from .search_flights import search_flights
 from .search_trains import search_trains
-from .search_trains import book_train
+from .search_trains import book_trains
 from .create_invoice import create_invoice
 
 
@@ -12,8 +12,8 @@ def get_handler(tool_name: str):
         return search_flights
     if tool_name == "SearchTrains":
         return search_trains
-    if tool_name == "BookTrain":
+    if tool_name == "BookTrains":
-        return book_train
+        return book_trains
     if tool_name == "CreateInvoice":
         return create_invoice
 

tools/goal_registry.py

@@ -3,7 +3,7 @@ from tools.tool_registry import (
     search_fixtures_tool,
     search_flights_tool,
     search_trains_tool,
-    book_train_tool,
+    book_trains_tool,
     create_invoice_tool,
 )
 
@@ -11,13 +11,13 @@ goal_match_train_invoice = AgentGoal(
     tools=[
         search_fixtures_tool,
         search_trains_tool,
-        book_train_tool,
+        book_trains_tool,
         create_invoice_tool,
     ],
     description="Help the user book trains to a premier league match. The user lives in London. Gather args for these tools in order: "
     "1. SearchFixtures: Search for fixtures for a team in a given month"
     "2. SearchTrains: Search for trains to the city of the match and list them for the customer to choose from"
-    "3. BookTrain: Book the train tickets"
+    "3. BookTrains: Book the train tickets"
     "4. CreateInvoice: Proactively offer to create a simple invoice for the cost of the flights and train tickets",
     starter_prompt="Welcome me, give me a description of what you can do, then ask me for the details you need to do your job",
     example_conversation_history="\n ".join(
@@ -32,7 +32,7 @@ goal_match_train_invoice = AgentGoal(
             "user_confirmed_tool_run: <user clicks confirm on SearchTrains tool>",
             "tool_result: <results including train dates and times, origin and depature stations>",
             "agent: Found some trains! <agent provides a human-readable list of train options>",
-            "user_confirmed_tool_run: <user clicks confirm on BookTrain tool>",
+            "user_confirmed_tool_run: <user clicks confirm on BookTrains tool>",
             'tool_result: results including {"status": "success"}',
             "agent: Train tickets booked! Please confirm the following invoice for the journey. <agent infers total amount for the invoice and details from the conversation history>",
             "user_confirmed_tool_run: <user clicks confirm on CreateInvoice tool which includes details of the train journey, the match, and the total cost>",

tools/search_trains.py

@@ -15,7 +15,7 @@ def search_trains(args: dict) -> dict:
     if not origin or not destination or not outbound_time or not return_time:
         return {"error": "Origin, destination, outbound_time and return_time are required."}
 
-    search_url = f'{BASE_URL}/api/journeys'
+    search_url = f'{BASE_URL}/api/search'
     params = {
         'from': origin,
         'to': destination,
@@ -31,15 +31,15 @@ def search_trains(args: dict) -> dict:
     journey_data = response.json()
     return journey_data
 
-def book_train(args: dict) -> dict:
+def book_trains(args: dict) -> dict:
     load_dotenv(override=True)
 
-    journey_id = args.get("journey_id")
+    train_ids = args.get("train_ids")
 
-    if not journey_id:
+    if not train_ids:
-        return {"error": "Journey ID is required."}
+        return {"error": "Train IDs is required."}
 
-    book_url = f'{BASE_URL}/api/book/{journey_id}'
+    book_url = f'{BASE_URL}/api/book/{train_ids}'
     response = requests.post(book_url)
     if response.status_code != 200:
         return {"error": "Failed to book ticket."}
@@ -59,7 +59,7 @@ if __name__ == "__main__":
     print(search_results)
 
     book_args = {
-        "journey_id": "12345",
+        "train_ids": "12345",
     }
-    booking_results = book_train(book_args)
+    booking_results = book_trains(book_args)
     print(booking_results)

tools/tool_registry.py

@@ -54,14 +54,14 @@ search_trains_tool = ToolDefinition(
     ],
 )
 
-book_train_tool = ToolDefinition(
+book_trains_tool = ToolDefinition(
-    name="BookTrain",
+    name="BookTrains",
-    description="Books a train ticket. Returns a booking reference.",
+    description="Books train tickets. Returns a booking reference.",
     arguments=[
         ToolArgument(
-            name="journey_id",
+            name="train_ids",
             type="string",
-            description="The ID of the journey to book",
+            description="The IDs of the trains to book, comma separated",
         ),
     ],
 )