From 3b869974d0513d6d0a00e2bc8dd5d13d872e05ad Mon Sep 17 00:00:00 2001
From: clarkzjw <i@jinwei.me>
Date: Thu, 24 Nov 2022 16:29:14 -0800
Subject: bot: add telegram bot to produce square image

---
 .gitignore       |  1 +
 bot.py           | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 requirements.txt | 17 ++++++++++++
 3 files changed, 102 insertions(+)
 create mode 100644 bot.py

diff --git a/.gitignore b/.gitignore
index be2fb47..40992df 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+__pycache__/
 .idea/
 *.png
 *.jpg
diff --git a/bot.py b/bot.py
new file mode 100644
index 0000000..2d48783
--- /dev/null
+++ b/bot.py
@@ -0,0 +1,84 @@
+import logging
+import os
+
+from telegram import __version__ as TG_VER
+
+try:
+    from telegram import __version_info__
+except ImportError:
+    __version_info__ = (0, 0, 0, 0, 0)  # type: ignore[assignment]
+
+if __version_info__ < (20, 0, 0, "alpha", 1):
+    raise RuntimeError(
+        f"This example is not compatible with your current PTB version {TG_VER}. To view the "
+        f"{TG_VER} version of this example, "
+        f"visit https://docs.python-telegram-bot.org/en/v{TG_VER}/examples.html"
+
+    )
+
+from telegram import ForceReply, Update, File
+from telegram.ext import Application, CommandHandler, ContextTypes, MessageHandler, filters
+from telegram.constants import ParseMode
+from PIL import Image, ImageFilter
+from square import square_size_padding, drop_shadow
+
+# Enable logging
+
+logging.basicConfig(
+    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s", level=logging.INFO
+)
+
+logger = logging.getLogger(__name__)
+
+
+# Define a few command handlers. These usually take the two arguments update and context.
+
+async def start(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
+    """Send a message when the command /start is issued."""
+    user = update.effective_user
+    await update.message.reply_html(
+        rf"Hi {user.mention_html()}!",
+    )
+
+
+async def process(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
+    """Echo the user message."""
+    filename = update.message.document.file_name
+    chat_id = update.message.chat_id
+    await context.bot.send_message(chat_id, "Processing `{}`".format(filename),
+                                   parse_mode=ParseMode.MARKDOWN_V2)
+
+    file = await update.message.effective_attachment.get_file()
+    img = await file.download_to_drive(filename)
+
+    try:
+        im = Image.open(img)
+        names = filename.split(".")
+        result = square_size_padding(im)
+        filename = "{}-result.{}".format(names[0], names[1])
+        result.save(filename, quality=100)
+
+        await context.bot.send_document(chat_id=update.message.chat_id, document=filename)
+
+    except Exception as e:
+        await update.message.reply_markdown_v2(text="Error:\n```{}```".format(str(e)))
+
+
+def main() -> None:
+    """Start the bot."""
+    # Create the Application and pass it your bot's token.
+    tg_token = os.getenv("TG_TOKEN")
+    application = Application.builder().token(tg_token).build()
+
+    # on different commands - answer in Telegram
+    application.add_handler(CommandHandler("start", start))
+
+    # on non command i.e message - echo the message on Telegram
+    application.add_handler(MessageHandler(filters.ATTACHMENT & ~filters.COMMAND, process))
+
+    # Run the bot until the user presses Ctrl-C
+    application.run_polling()
+
+
+if __name__ == "__main__":
+    main()
diff --git a/requirements.txt b/requirements.txt
index a6d4d60..ac7741f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,18 @@
+anyio==3.6.2
+APScheduler==3.6.3
+cachetools==4.2.2
+certifi==2022.9.24
+h11==0.14.0
+httpcore==0.16.1
+httpx==0.23.1
+idna==3.4
 Pillow==9.2.0
+python-telegram-bot==20.0a6
+pytz==2022.6
+pytz-deprecation-shim==0.1.0.post0
+rfc3986==1.5.0
+six==1.16.0
+sniffio==1.3.0
+tornado==6.1
+tzdata==2022.6
+tzlocal==4.2
-- 
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