Gemini

BotNet.CommandHandlers/AI/Gemini/GeminiTextPromptHandler.cs

@@ -0,0 +1,132 @@
+using BotNet.Commands;
+using BotNet.Commands.AI.Gemini;
+using BotNet.Commands.BotUpdate.Message;
+using BotNet.Commands.ChatAggregate;
+using BotNet.Commands.CommandPrioritization;
+using BotNet.Services.Gemini;
+using BotNet.Services.Gemini.Models;
+using BotNet.Services.MarkdownV2;
+using BotNet.Services.RateLimit;
+using Microsoft.Extensions.Logging;
+using Telegram.Bot;
+using Telegram.Bot.Types;
+using Telegram.Bot.Types.Enums;
+
+namespace BotNet.CommandHandlers.AI.Gemini {
+	public sealed class GeminiTextPromptHandler(
+		ITelegramBotClient telegramBotClient,
+		GeminiClient geminiClient,
+		ITelegramMessageCache telegramMessageCache,
+		CommandPriorityCategorizer commandPriorityCategorizer,
+		ILogger<GeminiTextPromptHandler> logger
+	) : ICommandHandler<GeminiTextPrompt> {
+		internal static readonly RateLimiter CHAT_RATE_LIMITER = RateLimiter.PerChat(60, TimeSpan.FromMinutes(1));
+
+		private readonly ITelegramBotClient _telegramBotClient = telegramBotClient;
+		private readonly GeminiClient _geminiClient = geminiClient;
+		private readonly ITelegramMessageCache _telegramMessageCache = telegramMessageCache;
+		private readonly CommandPriorityCategorizer _commandPriorityCategorizer = commandPriorityCategorizer;
+		private readonly ILogger<GeminiTextPromptHandler> _logger = logger;
+
+		public Task Handle(GeminiTextPrompt textPrompt, CancellationToken cancellationToken) {
+			if (textPrompt.Command.Chat is not HomeGroupChat) {
+				return _telegramBotClient.SendTextMessageAsync(
+					chatId: textPrompt.Command.Chat.Id,
+					text: MarkdownV2Sanitizer.Sanitize("Gemini tidak bisa dipakai di sini."),
+					parseMode: ParseMode.MarkdownV2,
+					replyToMessageId: textPrompt.Command.MessageId,
+					cancellationToken: cancellationToken
+				);
+			}
+
+			try {
+				CHAT_RATE_LIMITER.ValidateActionRate(
+					chatId: textPrompt.Command.Chat.Id,
+					userId: textPrompt.Command.Sender.Id
+				);
+			} catch (RateLimitExceededException exc) {
+				return _telegramBotClient.SendTextMessageAsync(
+					chatId: textPrompt.Command.Chat.Id,
+					text: $"<code>Anda terlalu banyak memanggil AI. Coba lagi {exc.Cooldown}.</code>",
+					parseMode: ParseMode.Html,
+					replyToMessageId: textPrompt.Command.MessageId,
+					cancellationToken: cancellationToken
+				);
+			}
+
+			// Fire and forget
+			Task.Run(async () => {
+				List<Content> messages = [];
+
+				// Merge adjacent messages from same role
+				foreach (MessageBase message in textPrompt.Thread.Reverse()) {
+					Content content = Content.FromText(
+						role: message.Sender.GeminiRole,
+						text: message.Text
+					);
+
+					if (messages.Count > 0
+						&& messages[^1].Role == message.Sender.GeminiRole) {
+						messages[^1].Add(content);
+					} else {
+						messages.Add(content);
+					}
+				}
+
+				// Trim thread longer than 10 messages
+				while (messages.Count > 10) {
+					messages.RemoveAt(0);
+				}
+
+				// Thread must start with user message
+				while (messages.Count > 0
+					&& messages[0].Role != "user") {
+					messages.RemoveAt(0);
+				}
+
+				messages.Add(
+					Content.FromText("user", textPrompt.Prompt)
+				);
+
+				Message responseMessage = await _telegramBotClient.SendTextMessageAsync(
+					chatId: textPrompt.Command.Chat.Id,
+					text: MarkdownV2Sanitizer.Sanitize("… ⏳"),
+					parseMode: ParseMode.MarkdownV2,
+					replyToMessageId: textPrompt.Command.MessageId
+				);
+
+				string response = await _geminiClient.ChatAsync(
+					messages: messages,
+					maxTokens: 512,
+					cancellationToken: cancellationToken
+				);
+
+				// Finalize message
+				try {
+					responseMessage = await telegramBotClient.EditMessageTextAsync(
+						chatId: textPrompt.Command.Chat.Id,
+						messageId: responseMessage.MessageId,
+						text: MarkdownV2Sanitizer.Sanitize(response),
+						parseMode: ParseMode.MarkdownV2,
+						cancellationToken: cancellationToken
+					);
+				} catch (Exception exc) {
+					_logger.LogError(exc, null);
+					throw;
+				}
+
+				// Track thread
+				_telegramMessageCache.Add(
+					message: AIResponseMessage.FromMessage(
+						message: responseMessage,
+						replyToMessage: textPrompt.Command,
+						callSign: "Gemini",
+						commandPriorityCategorizer: _commandPriorityCategorizer
+					)
+				);
+			});
+
+			return Task.CompletedTask;
+		}
+	}
+}

BotNet.CommandHandlers/BotUpdate/Message/AICallCommandHandler.cs

@@ -1,4 +1,5 @@
 using BotNet.Commands;
+using BotNet.Commands.AI.Gemini;
 using BotNet.Commands.AI.OpenAI;
 using BotNet.Commands.BotUpdate.Message;
 using BotNet.Services.OpenAI;
@@ -37,6 +38,17 @@ await _commandQueue.DispatchAsync(
 						);
 						break;
 					}
+				case "Gemini" when command.ImageFileId is null && command.ReplyToMessage?.ImageFileId is null: {
+						await _commandQueue.DispatchAsync(
+							command: GeminiTextPrompt.FromAICallCommand(
+								aiCallCommand: command,
+								thread: command.ReplyToMessage is { } replyToMessage
+									? _telegramMessageCache.GetThread(replyToMessage)
+									: Enumerable.Empty<MessageBase>()
+							)
+						);
+						break;
+					}
 			}
 		}
 	}

BotNet.CommandHandlers/BotUpdate/Message/AIFollowUpMessageHandler.cs

@@ -1,4 +1,5 @@
 using BotNet.Commands;
+using BotNet.Commands.AI.Gemini;
 using BotNet.Commands.AI.OpenAI;
 using BotNet.Commands.BotUpdate.Message;
 
@@ -25,6 +26,18 @@ await _commandQueue.DispatchAsync(
 						)
 					);
 					break;
+				case "Gemini":
+					await _commandQueue.DispatchAsync(
+						command: GeminiTextPrompt.FromAIFollowUpMessage(
+							aIFollowUpMessage: command,
+							thread: command.ReplyToMessage is null
+								? Enumerable.Empty<MessageBase>()
+								: _telegramMessageCache.GetThread(
+									firstMessage: command.ReplyToMessage
+								)
+						)
+					);
+					break;
 			}
 		}
 	}

BotNet.Commands/AI/Gemini/GeminiTextPrompt.cs

@@ -0,0 +1,77 @@
+using BotNet.Commands.BotUpdate.Message;
+
+namespace BotNet.Commands.AI.Gemini {
+	public sealed record GeminiTextPrompt : ICommand {
+		public string Prompt { get; }
+		public HumanMessageBase Command { get; }
+		public IEnumerable<MessageBase> Thread { get; }
+
+		private GeminiTextPrompt(
+			string prompt,
+			HumanMessageBase command,
+			IEnumerable<MessageBase> thread
+		) {
+			Prompt = prompt;
+			Command = command;
+			Thread = thread;
+		}
+
+		public static GeminiTextPrompt FromAICallCommand(AICallCommand aiCallCommand, IEnumerable<MessageBase> thread) {
+			// Call sign must be Gemini
+			if (aiCallCommand.CallSign != "Gemini") {
+				throw new ArgumentException("Call sign must be Gemini", nameof(aiCallCommand));
+			}
+
+			// Prompt must be non-empty
+			if (string.IsNullOrWhiteSpace(aiCallCommand.Text)) {
+				throw new ArgumentException("Prompt must be non-empty", nameof(aiCallCommand));
+			}
+
+			// Non-empty thread must begin with reply to message
+			if (thread.FirstOrDefault() is {
+				MessageId: { } firstMessageId,
+				Chat.Id: { } firstChatId
+			}) {
+				if (firstMessageId != aiCallCommand.ReplyToMessage?.MessageId
+					|| firstChatId != aiCallCommand.Chat.Id) {
+					throw new ArgumentException("Thread must begin with reply to message", nameof(thread));
+				}
+			}
+
+			return new(
+				prompt: aiCallCommand.Text,
+				command: aiCallCommand,
+				thread: thread
+			);
+		}
+
+		public static GeminiTextPrompt FromAIFollowUpMessage(AIFollowUpMessage aIFollowUpMessage, IEnumerable<MessageBase> thread) {
+			// Call sign must be Gemini
+			if (aIFollowUpMessage.CallSign != "Gemini") {
+				throw new ArgumentException("Call sign must be Gemini", nameof(aIFollowUpMessage));
+			}
+
+			// Prompt must be non-empty
+			if (string.IsNullOrWhiteSpace(aIFollowUpMessage.Text)) {
+				throw new ArgumentException("Prompt must be non-empty", nameof(aIFollowUpMessage));
+			}
+
+			// Non-empty thread must begin with reply to message
+			if (thread.FirstOrDefault() is {
+				MessageId: { } firstMessageId,
+				Chat.Id: { } firstChatId
+			}) {
+				if (firstMessageId != aIFollowUpMessage.ReplyToMessage?.MessageId
+					|| firstChatId != aIFollowUpMessage.Chat.Id) {
+					throw new ArgumentException("Thread must begin with reply to message", nameof(thread));
+				}
+			}
+
+			return new(
+				prompt: aIFollowUpMessage.Text,
+				command: aIFollowUpMessage,
+				thread: thread
+			);
+		}
+	}
+}

BotNet.Commands/SenderAggregate/Sender.cs

@@ -7,13 +7,15 @@ public abstract record SenderBase(
 		string Name
 	) {
 		public abstract string ChatGPTRole { get; }
+		public abstract string GeminiRole { get; }
 	}
 
 	public record HumanSender(
 		SenderId Id,
 		string Name
 	) : SenderBase(Id, Name) {
 		public override string ChatGPTRole => "user";
+		public override string GeminiRole => "user";
 
 		public static bool TryCreate(
 			Telegram.Bot.Types.User user,
@@ -51,6 +53,7 @@ public sealed record BotSender(
 		string Name
 	) : SenderBase(Id, Name) {
 		public override string ChatGPTRole => "assistant";
+		public override string GeminiRole => "model";
 
 		public static bool TryCreate(
 			Telegram.Bot.Types.User user,

BotNet.Services/Gemini/GeminiClient.cs

@@ -0,0 +1,54 @@
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Net.Http;
+using System.Net.Http.Json;
+using System.Text.Json;
+using System.Threading;
+using System.Threading.Tasks;
+using BotNet.Services.Gemini.Models;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+
+namespace BotNet.Services.Gemini {
+	public class GeminiClient(
+		HttpClient httpClient,
+		IOptions<GeminiOptions> geminiOptionsAccessor,
+		ILogger<GeminiClient> logger
+	) {
+		private const string BASE_URL = "https://generativelanguage.googleapis.com/v1beta/models/gemini-pro:generateContent";
+		private readonly HttpClient _httpClient = httpClient;
+		private readonly string _apiKey = geminiOptionsAccessor.Value.ApiKey!;
+		private readonly ILogger<GeminiClient> _logger = logger;
+
+		public async Task<string> ChatAsync(IEnumerable<Content> messages, int maxTokens, CancellationToken cancellationToken) {
+			GeminiRequest geminiRequest = new(
+				Contents: messages.ToImmutableList(),
+				SafetySettings: null,
+				GenerationConfig: new(
+					MaxOutputTokens: maxTokens
+				)
+			);
+			using HttpRequestMessage request = new(HttpMethod.Post, BASE_URL + $"?key={_apiKey}") {
+				Headers = {
+					{ "Accept", "application/json" }
+				},
+				Content = JsonContent.Create(
+					inputValue: geminiRequest
+				)
+			};
+			using HttpResponseMessage response = await _httpClient.SendAsync(request, cancellationToken);
+			string responseContent = await response.Content.ReadAsStringAsync(cancellationToken);
+			response.EnsureSuccessStatusCode();
+
+			GeminiResponse? geminiResponse = JsonSerializer.Deserialize<GeminiResponse>(responseContent);
+			if (geminiResponse == null) return "";
+			if (geminiResponse.Candidates == null) return "";
+			if (geminiResponse.Candidates.Count == 0) return "";
+			Content? content = geminiResponse.Candidates[0].Content;
+			if (content == null) return "";
+			if (content.Parts == null) return "";
+			if (content.Parts.Count == 0) return "";
+			return content.Parts[0].Text ?? "";
+		}
+	}
+}

BotNet.Services/Gemini/GeminiOptions.cs

@@ -0,0 +1,5 @@
+namespace BotNet.Services.Gemini {
+	public class GeminiOptions {
+		public string? ApiKey { get; set; }
+	}
+}

BotNet.Services/Gemini/Models/Candidate.cs

@@ -0,0 +1,11 @@
+using System.Collections.Immutable;
+using System.Text.Json.Serialization;
+
+namespace BotNet.Services.Gemini.Models {
+	public sealed record Candidate(
+		[property: JsonPropertyName("content")] Content? Content,
+		[property: JsonPropertyName("finishReason")] string? FinishReason,
+		[property: JsonPropertyName("index")] int? Index,
+		[property: JsonPropertyName("safetyRatings")] ImmutableList<SafetyRating>? SafetyRatings
+	);
+}

BotNet.Services/Gemini/Models/Content.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Text.Json.Serialization;
+
+namespace BotNet.Services.Gemini.Models {
+	public record Content(
+		[property: JsonPropertyName("role"), JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)] string? Role,
+		[property: JsonPropertyName("parts")] List<Part>? Parts
+	) {
+		public static Content FromText(string role, string text) => new(
+			Role: role,
+			Parts: [
+				new(Text: text)
+			]
+		);
+
+		public void Add(Content content) {
+			if (content.Role != Role) throw new InvalidOperationException();
+			Parts!.AddRange(content.Parts!);
+		}
+	}
+}

BotNet.Services/Gemini/Models/GeminiRequest.cs

@@ -0,0 +1,10 @@
+using System.Collections.Immutable;
+using System.Text.Json.Serialization;
+
+namespace BotNet.Services.Gemini.Models {
+	public sealed record GeminiRequest(
+		[property: JsonPropertyName("contents")] ImmutableList<Content> Contents,
+		[property: JsonPropertyName("safetySettings"), JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)] ImmutableList<SafetySettings>? SafetySettings,
+		[property: JsonPropertyName("generationConfig"), JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)] GenerationConfig? GenerationConfig
+	);
+}