japanese-reading-bot

main.go

package main

import (
	"context"
	"log/slog"

	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
	"vsxlabs.com/client/awsclient"
	"vsxlabs.com/client/openaiclient"
	"vsxlabs.com/internal/telegrambot"
)

const systemPrompt = `
You are a Japanese language tutor. When the user provides a theme, you will write a short Japanese mini-article (2–3 paragraphs) about the theme with inline translations. Carefully follow the user's theme - article must be about it.
You must follow these strict rules:

Content rules:
- The article must consist of 3 short paragraphs. Each paragraph must be clear and simple.
- Use only simple, common kanji. Avoid complex or rare kanji.
- Do not add a theme/topic name to the output.
- Keep the article concise and readable.
Translation rules:
- All Japanese words, except です, は, and the ones written only in Katakana, must include meanings in () parentheses next to them, including verbs.
- For kanji words, include English meanings of each individual kanji and the full word meaning. Do not include hiragana readings of kanji.
- Make sure all hiragana words and particles are also translated.
- Do not add English explanation outside of parentheses. Do not add spellings of words.
- Do not omit meanings for any Japanese word except Katakana-only words and edge cases mentioned above.

Output paragraph example:

ドリフト は、車 (car) を (object marker) 使って (using) 行う (perform) スポーツ の一つ (one [of them]) です。
特に (especially)、サーキット や (and) 道路 (road) で (location marker: at/on) 行われます (is performed)。
ドリフトでは、運転手 (driver) が (subject marker) 意図的 (intentional) に (adverbial particle) 車 (car) を (object marker) 滑らせて (make it slide)、曲線 (curve) を (object marker) 速く (quickly) 回る (turn) こと (nominalizer: the act of) が (subject marker) 求められます (is required)。
この 運転技術 (driving technique) は、特に (especially) 人気 (popularity) が (subject marker) あり (exists/has)、多くの (many) ファン が (subject marker) います (exist / there are)。
`

func main() {
	slog.Info("Starting japanesereadingbot")
	client := openaiclient.MustKeyBased(context.Background(), awsclient.MustReadSecret("prod/vsxlabs/openAIKey"))
	h := handler{
		client: client,
	}
	telegrambot.MustStart(awsclient.MustReadSecret("prod/telegram/japaneseReadingBotToken"), h.handle)
}

type handler struct {
	client *openaiclient.Client
}

func (h *handler) handle(ctx context.Context, bot *telegrambot.Bot, update tgbotapi.Update) error {
	userMessage, chatID := update.Message.Text, update.Message.Chat.ID
	tgResp, err := bot.SendMessage(chatID, "Generating...")
	if err != nil {
		slog.Error("Error sending initial response", "error", err)
		return err
	}
	msgID := tgResp.MessageID
	resp, err := h.client.ChatCompletion(ctx, openaiclient.Model41Mini, systemPrompt, userMessage)
	if err != nil {
		slog.Error("Error getting LLM response", "error", err)
		resp = "Error: " + err.Error()
	}
	if err := bot.DeleteMessage(chatID, msgID); err != nil {
		slog.Error("Error deleting initial message", "error", err)
	}
	_, err = bot.SendMessage(chatID, resp)
	if err != nil {
		slog.Error("Error sending final response", "error", err)
	}
	return err
}