feat: get web app talking to api

src/AltGen.API/Program.cs

@@ -45,6 +45,21 @@ builder.Services.AddRateLimiter(
   }
 );
 
+// TODO: Make CORS more restrictive
+// only allow requests from the web
+// client
+const string corsPolicyName = "cors";
+
+builder.Services.AddCors(o => 
+{
+  o.AddPolicy(corsPolicyName, p => 
+  {
+    p.AllowAnyOrigin()
+      .AllowAnyOrigin()
+      .AllowAnyMethod();
+  });
+});
+
 var app = builder.Build();
 
 if (app.Environment.IsDevelopment())
@@ -57,6 +72,8 @@ if (app.Environment.IsProduction())
   app.UseRateLimiter();
 }
 
+app.UseCors(corsPolicyName);
+
 app.UseHttpsRedirection();
 
 app.UseStatusCodePages();

src/AltGen.Console/Generate/AltGenService.cs

@@ -1,5 +1,6 @@
 namespace AltGen.Console.Generate;
 
+// TODO: Use shared library version of this service
 sealed class AltGenService(HttpClient client) : IAltGenService
 {
   static readonly JsonSerializerOptions JsonOptions = new()

src/AltGen.Shared/AltGen.Shared.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

src/AltGen.Shared/Generate/AltGenService.cs

@@ -0,0 +1,47 @@
+using System.Net.Http.Headers;
+using System.Text.Json;
+
+namespace AltGen.Shared.Generate;
+
+public sealed class AltGenService(HttpClient client) : IAltGenService
+{
+  static readonly JsonSerializerOptions JsonOptions = new()
+  {
+    PropertyNameCaseInsensitive = true
+  };
+  readonly HttpClient _client = client;
+
+  public async Task<string> GenerateAltTextAsync(GenerateAltTextRequest req)
+  {
+    var byteContent = new ByteArrayContent(req.Image);
+    byteContent.Headers.ContentType = new MediaTypeHeaderValue(req.ContentType);
+
+    var request = new HttpRequestMessage(HttpMethod.Post, "/generate")
+    {
+      Content = new MultipartFormDataContent
+      {
+        { new StringContent(req.Provider), "provider" },
+        { new StringContent(req.ProviderKey), "providerKey" },
+        { byteContent, "file", req.FileName }
+      }
+    };
+
+    var response = await _client.SendAsync(request);
+    var content = await response.Content.ReadAsStringAsync();
+
+    if (response.IsSuccessStatusCode is false)
+    {
+      throw new AltTextException("Failed to generate alt text.");
+    }
+
+    var altTextResponse = JsonSerializer.Deserialize<AltTextResponse>(content, JsonOptions) ?? throw new AltTextException("Failed to deserialize response.");
+
+    return altTextResponse.AltText;
+  }
+}
+
+record AltTextResponse(string AltText);
+
+class AltTextException(string message) : Exception(message)
+{
+}

src/AltGen.Shared/Generate/GenerateAltTextRequest.cs

@@ -0,0 +1,9 @@
+namespace AltGen.Shared.Generate;
+
+public record GenerateAltTextRequest(
+  string Provider,
+  string ProviderKey,
+  string FileName,
+  byte[] Image,
+  string ContentType
+);

src/AltGen.Shared/Generate/IAltGenService.cs

@@ -0,0 +1,6 @@
+namespace AltGen.Shared.Generate;
+
+public interface IAltGenService
+{
+  public Task<string> GenerateAltTextAsync(GenerateAltTextRequest req);
+}

src/AltGen.Web.Client/AltGen.Web.Client.csproj

@@ -10,6 +10,11 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="9.0.3" />
+    <PackageReference Include="Microsoft.Extensions.Http" Version="9.0.3" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\AltGen.Shared\AltGen.Shared.csproj" />
   </ItemGroup>
 
 </Project>

src/AltGen.Web.Client/Components/Pages/Home.razor

@@ -1,24 +1,51 @@
-@inject ILogger<Home> Logger
+@using AltGen.Shared.Generate
+@inject ILogger<Home> Logger
+@inject IAltGenService AltGenService
 @page "/"
-@rendermode InteractiveWebAssembly
+@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 
 <PageTitle>AltGen.Web</PageTitle>
 
 <h1>AI Generated Alt Text</h1>
 
 <form method="post">
-  <input type="text" @onchange="@(e => Logger.LogInformation("Text changed: {Value}", e.Value))" />
-  <InputFile OnChange="LoadFiles" multiple />
+  <div>
+    <label for="provider">Provider</label>
+    <input type="text" id="provider" name="provider" required @bind="_provider" />
+  </div>
+  <div>
+    <label for="providerKey">Provider Key</label>
+    <input type="password" id="providerKey" name="providerKey" required @bind="_providerKey" />
+  </div>
+  <InputFile OnChange="HandleFileChange" />
 </form>
 
 @code {
-  private void LoadFiles(InputFileChangeEventArgs e)
-  {
-    var files = e.GetMultipleFiles(5);
+  private string? _provider;
+  private string? _providerKey;
 
-    foreach (var file in files)
+  private async Task HandleFileChange(InputFileChangeEventArgs e)
   {
-      Logger.LogInformation("File loaded: {Name}, Size: {Size}", file.Name, file.Size);
+    var file = e.File;
+
+    if (_provider is null || _providerKey is null || file is null)
+    {
+      return;
     }
+
+    var fileBytes = new byte[file.Size];
+    using var stream = file.OpenReadStream();
+    await stream.ReadAsync(fileBytes, 0, (int)file.Size);
+
+    var altText = await AltGenService.GenerateAltTextAsync(new(
+      _provider,
+      _providerKey,
+      file.Name,
+      fileBytes,
+      file.ContentType
+    ));
+
+    // TODO: Present on the screen to the user
+    Logger.LogInformation(altText);
   }
 }

src/AltGen.Web.Client/Program.cs

@@ -1,5 +1,10 @@
 using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
+using AltGen.Shared.Generate;
 
 var builder = WebAssemblyHostBuilder.CreateDefault(args);
 
+// TODO: Read base url
+// from configuration
+builder.Services.AddHttpClient<IAltGenService, AltGenService>(c => c.BaseAddress = new("https://localhost:7297"));
+
 await builder.Build().RunAsync();

src/AltGen.Web/AltGen.Web.csproj

@@ -11,4 +11,8 @@
     <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.Server" Version="9.0.3" />
   </ItemGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\AltGen.Shared\AltGen.Shared.csproj" />
+  </ItemGroup>
+
 </Project>

src/AltGen.sln

@@ -15,6 +15,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AltGen.Web", "AltGen.Web\Al
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AltGen.Web.Client", "AltGen.Web.Client\AltGen.Web.Client.csproj", "{DCE07E79-23A4-490E-A796-EA140D2040C1}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AltGen.Shared", "AltGen.Shared\AltGen.Shared.csproj", "{68D4BC5D-A6FE-41CF-B744-1DB83CCFBC89}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -48,5 +50,9 @@ Global
 		{DCE07E79-23A4-490E-A796-EA140D2040C1}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{DCE07E79-23A4-490E-A796-EA140D2040C1}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{DCE07E79-23A4-490E-A796-EA140D2040C1}.Release|Any CPU.Build.0 = Release|Any CPU
+		{68D4BC5D-A6FE-41CF-B744-1DB83CCFBC89}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{68D4BC5D-A6FE-41CF-B744-1DB83CCFBC89}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{68D4BC5D-A6FE-41CF-B744-1DB83CCFBC89}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{68D4BC5D-A6FE-41CF-B744-1DB83CCFBC89}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal