path: root/bot/bot.py

import io
import os
import logging
import traceback
from PIL import Image
import boto3
from telegram import Update
from telegram.constants import ParseMode
from telegram.ext import Application, CommandHandler, ContextTypes, MessageHandler, filters
from peewee import *
from uuid import uuid4
from datetime import datetime
import json

db = SqliteDatabase("database/photos.db")
db.connect(reuse_if_open=True)


class BaseModel(Model):
    class Meta:
        database = db


class Photo(BaseModel):
    guid = CharField(unique=True, primary_key=True)
    fileId = CharField(max_length=256)
    width = IntegerField()
    height = IntegerField()
    ratio = FloatField()
    orientation = CharField(max_length=128)
    path = CharField(max_length=256)
    caption = CharField(max_length=256)
    alt = CharField(max_length=256)
    createdAt = DateTimeField()
    uploadedAt = DateTimeField()


with db.connection_context():
    db.create_tables([Photo])

logging.basicConfig(
    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s", level=logging.INFO
)

logger = logging.getLogger(__name__)


async def start(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
    await update.message.reply_text("This is a bot to output image in square shape")


bucket_name = "pixel-jinwei-me"
cf_account_id = os.getenv("CF_ACCOUNT_ID")
aws_access_key_id = os.getenv("CF_R2_KEY_ID")
aws_secret_access_key = os.getenv("CF_R2_ACCESS_KEY_SECRET")


def write_json() -> bool:
    with db.connection_context():
        photos = Photo.select()
        results = []
        for photo in photos:
            results.append({
                "guid": photo.guid,
                "fileId": photo.fileId,
                "width": photo.width,
                "height": photo.height,
                "ratio": photo.ratio,
                "orientation": photo.orientation,
                "path": photo.path,
                "caption": photo.caption,
                "alt": photo.alt,
                "createdAt": photo.createdAt.strftime("%Y-%m-%dT%H:%M:%S.000Z"),
                "uploadedAt": photo.uploadedAt.strftime("%Y-%m-%dT%H:%M:%S.000Z")
            })
        with open("database/photos.json", "w") as f:
            f.write(json.dumps(results))
    return True


def upload_to_s3(key_name: str, file: bytes):
    endpoint_ca_central = "https://{}.r2.cloudflarestorage.com".format(cf_account_id)

    client = boto3.client("s3",
                          region_name="auto",
                          endpoint_url=endpoint_ca_central,
                          aws_access_key_id=aws_access_key_id,
                          aws_secret_access_key=aws_secret_access_key)

    response = client.list_buckets()
    buckets = [b["Name"] for b in response['Buckets']]

    if bucket_name not in buckets:
        print("{} doesn't exist".format(bucket_name))
        print('Existing buckets:')
        for bucket in response['Buckets']:
            print(f' {bucket["Name"]}')
        return False

    response = client.put_object(Body=file, Bucket=bucket_name, Key=key_name, ContentType="image/webp")
    status = response["ResponseMetadata"]["HTTPStatusCode"]
    if status == 200:
        print("upload {} to {} succeed".format(key_name, bucket_name))
        return True
    else:
        print("upload {} to {} failed, status: {}".format(key_name, bucket_name, status))
        return False


async def process(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
    chat_id = update.message.chat_id

    if update.message.document is not None:
        names = update.message.document.file_name.split(".")
        file_ext = names[1]
        filename = names[0]

        if str.upper(file_ext) not in ("JPG", "JPEG", "PNG"):
            await context.bot.send_message(chat_id, "Image extension `{}` not supported".format(file_ext),
                                           parse_mode=ParseMode.MARKDOWN_V2)
            return

        file = await update.message.effective_attachment.get_file()
    else:
        return

    await context.bot.send_message(chat_id, "Processing `{}`".format(filename), parse_mode=ParseMode.MARKDOWN_V2)

    img = io.BytesIO()
    await file.download_to_memory(img)

    try:
        im = Image.open(img)
        output = io.BytesIO()
        im.save(output, format="webp", lossless=False, quality=80)

        now = datetime.now().strftime("%Y-%m-%d-%H-%M-%S")
        key_name = "{}-{}.webp".format(now, filename)

        with db.connection_context():
            photo = Photo.create(guid=str.upper(str(uuid4())),
                                 fileId=key_name,
                                 width=im.width,
                                 height=im.height,
                                 ratio=im.width / im.height,
                                 orientation="landscape" if im.width > im.height else "portrait",
                                 path="https://pixelstatic.jinwei.me/{}".format(key_name),
                                 caption="",
                                 alt="",
                                 createdAt=datetime.now(),
                                 uploadedAt=datetime.now())

            output.seek(0)
            upload_to_s3(photo.fileId, output.read())

        write_json()
        await update.message.reply_markdown_v2(text="Done")

    except Exception:
        await update.message.reply_markdown_v2(text="Error:\n```{}```".format(traceback.format_exc()))


def main() -> None:
    tg_token = os.getenv("TG_TOKEN")
    application = Application.builder().token(tg_token).build()

    application.add_handler(CommandHandler("start", start))
    application.add_handler(MessageHandler(filters.ATTACHMENT & ~filters.COMMAND, process))

    application.run_polling()


if __name__ == "__main__":
    main()