Added Open AI implementation for summarization

Author: Jandev

src/Minifier.Frontend/Configuration.cs

@@ -5,6 +5,7 @@ namespace Minifier.Frontend
 	internal class Configuration 
 	{
 		public UrlMinifierRepository UrlMinifierRepository { get; } = new UrlMinifierRepository();
+		public OpenAi OpenAi { get; } = new OpenAi();
 	}
 
 	internal class UrlMinifierRepository 
@@ -14,4 +15,13 @@ internal class UrlMinifierRepository
 		public string DatabaseName { get; } = Environment.GetEnvironmentVariable($"{nameof(UrlMinifierRepository)}__{nameof(DatabaseName)}", EnvironmentVariableTarget.Process);
 		public string CollectionName { get; } = Environment.GetEnvironmentVariable($"{nameof(UrlMinifierRepository)}__{nameof(CollectionName)}", EnvironmentVariableTarget.Process);
 	}
+
+	internal class OpenAi
+	{
+		public string ApiKey { get; } = Environment.GetEnvironmentVariable("OpenAiServiceKey", EnvironmentVariableTarget.Process);
+
+		public string Endpoint { get; } = Environment.GetEnvironmentVariable("OpenAiServiceCompletionEndpoint", EnvironmentVariableTarget.Process);
+
+		public string DeploymentId { get; } = Environment.GetEnvironmentVariable("OpenAiServiceDeploymentId", EnvironmentVariableTarget.Process);
+	}
 }

src/Minifier.Frontend/Minifier.Frontend.csproj

@@ -1,9 +1,10 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>net6.0</TargetFramework>
     <AzureFunctionsVersion>v4</AzureFunctionsVersion>
   </PropertyGroup>
   <ItemGroup>
+    <PackageReference Include="Azure.AI.OpenAI" Version="1.0.0-beta.5" />
     <PackageReference Include="Microsoft.Azure.Functions.Extensions" Version="1.1.0" />
     <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.CosmosDB" Version="4.0.0-preview3" />
     <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.ServiceBus" Version="5.2.0" />

src/Minifier.Frontend/OpenAI/Summarize.cs

@@ -1,13 +1,43 @@
 using System;
 using System.Threading.Tasks;
+using Azure;
+using Azure.AI.OpenAI;
+
 
 namespace Minifier.Frontend.OpenAI
 {
 	internal class Summarize : ISummarize
 	{
-		public Task<string> Invoke(string url)
+		private readonly Configuration configuration;
+
+		public Summarize(
+			Configuration configuration)
 		{
-			throw new NotImplementedException();
+			this.configuration = configuration;
+		}
+
+		public async Task<string> Invoke(string url)
+		{
+			var request = $"Summarize the contents of the following web page: {url}";
+			OpenAIClient client = new OpenAIClient(
+				new Uri("https://westeurope.api.cognitive.microsoft.com/"),
+				new AzureKeyCredential(this.configuration.OpenAi.ApiKey));
+
+			Response<Completions> completionsResponse = await client.GetCompletionsAsync(
+				deploymentOrModelName: this.configuration.OpenAi.DeploymentId,
+				new CompletionsOptions()
+				{
+					Prompts = { request },
+					Temperature = (float)1,
+					MaxTokens = 1000,
+					NucleusSamplingFactor = (float)0.5,
+					FrequencyPenalty = (float)0,
+					PresencePenalty = (float)0,
+					GenerationSampleCount = 1,
+				});
+			Completions completions = completionsResponse.Value;
+
+			return completions.Choices[0].Text;
 		}
 	}
 

src/Minifier.Frontend/Startup.cs

@@ -12,7 +12,6 @@ internal class Startup : FunctionsStartup
 	{
 		public override void Configure(IFunctionsHostBuilder builder)
 		{
-			builder.Services.AddLogging();
 			builder.Services.AddTransient<IGetFullUrlFromSlug, GetFullUrlFromSlug>();
 			builder.Services.AddSingleton<Configuration>();
 			builder.Services.AddTransient<CosmosClient>(s =>