commit 4fd3d49af164202b81bcfbb209babab8228fb999
Author: Gabriel Huber <mail@gabrielhuber.at>
Date:   Thu May 15 13:51:54 2025 +0200

    Test cat images

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..fa5212d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+bot.ini
+__pycache__
diff --git a/previewbot.py b/previewbot.py
new file mode 100644
index 0000000..d0cfefc
--- /dev/null
+++ b/previewbot.py
@@ -0,0 +1,90 @@
+import slixmpp
+from slixmpp.exceptions import IqError, IqTimeout
+import re
+import urlpreview
+import asyncio
+import logging
+
+logging.basicConfig(level=logging.DEBUG)
+url_regex = re.compile(r"https?://[^\s#]+")
+
+class PreviewBot(slixmpp.ClientXMPP):
+    def __init__(self, jid, password, nick, rooms):
+        super().__init__(jid, password)
+
+        self.nick = nick
+        self.rooms = rooms
+
+        self.register_plugin('xep_0030') # Service Discovery
+        self.register_plugin('xep_0045') # Multi-User Chat
+        self.register_plugin('xep_0199') # XMPP Ping
+        self.register_plugin("xep_0066")  # Out of band data
+
+        self.add_event_handler("session_start", self.on_session_start)
+        self.add_event_handler("message", self.on_message)
+        self.add_event_handler("groupchat_message", self.on_muc_message)
+
+    def on_session_start(self, event):
+        self.send_presence()
+        for room in self.rooms:
+            self.plugin["xep_0045"].join_muc(room, self.nick)
+
+    async def on_message(self, msg):
+        if msg["type"] in ("chat", "normal") and msg["from"] != self.nick:
+            url_matches = url_regex.findall(msg["body"])
+            if url_matches:
+                print("Fetching previews for:", url_matches)
+                fetch_tasks = [urlpreview.get_preview(url) for url in url_matches]
+                previews = await asyncio.gather(*fetch_tasks)
+                preview_lines = []
+                for url, preview_resp in zip(url_matches, previews):
+                    if preview_resp is None:
+                        preview_lines.append(f"Could not fetch preview for {url}")
+                    else:
+                        preview_lines.append(f"Title: {preview_resp}")
+                preview_text = "\n".join(preview_lines)
+                msg.reply(preview_text).send()
+                return
+            if "kuschelkatze" in msg["body"]:
+                reply_msg = msg.reply()
+                reply_msg["body"] = "http://bastiodon.lan/gabriel/ba8af1391c85f763.jpeg"
+                reply_msg["oob"]["url"] = "http://bastiodon.lan/gabriel/ba8af1391c85f763.jpeg"
+                reply_msg["oob"]["desc"] = "Katzenbild"
+                reply_msg.send()
+
+    async def on_muc_message(self, msg):
+        if msg["type"] == "groupchat" and msg["from"] != self.nick:
+            url_matches = url_regex.findall(msg["body"])
+            if url_matches:
+                print("Fetching previews for:", url_matches)
+                fetch_tasks = [urlpreview.get_preview(url) for url in url_matches]
+                previews = await asyncio.gather(*fetch_tasks)
+                preview_lines = []
+                for url, preview_resp in zip(url_matches, previews):
+                    if preview_resp is None:
+                        preview_lines.append(f"Could not fetch preview for {url}")
+                    else:
+                        preview_lines.append(f"Title: {preview_resp}")
+                preview_text = "\n".join(preview_lines)
+                msg.reply(preview_text).send()
+                return
+            if "kuschelkatze" in msg["body"]:
+                reply_msg = msg.reply()
+                reply_msg["body"] = "http://bastiodon.lan/gabriel/ba8af1391c85f763.jpeg"
+                reply_msg["oob"]["url"] = "http://bastiodon.lan/gabriel/ba8af1391c85f763.jpeg"
+                reply_msg["oob"]["desc"] = "Katzenbild"
+                reply_msg.send()
+
+
+if __name__ == "__main__":
+    config = configparser.ConfigParser()
+    config.read_file(open("bot.ini"))
+    bot = PreviewBot(
+        config["Login"]["jid"],
+        config["Login"]["password"],
+        config["Login"]["nick"],
+        config["Login"]["channels"].split(";")
+    )
+    bot.connect()
+    print("Connected")
+    asyncio.get_event_loop().run_forever()
diff --git a/urlpreview.py b/urlpreview.py
new file mode 100644
index 0000000..50cb0bb
--- /dev/null
+++ b/urlpreview.py
@@ -0,0 +1,39 @@
+import aiohttp
+import html.parser
+import asyncio
+
+class TitleExtractor(html.parser.HTMLParser):
+    def __init__(self):
+        super().__init__()
+        self.current_data = None
+        self.latest_title = None
+
+    def handle_data(self, data):
+        self.current_data = data
+
+    def handle_endtag(self, tag):
+        if tag == "title":
+            self.latest_title = self.current_data
+
+async def get_preview(url):
+    session = aiohttp.ClientSession()
+    session.headers["user-agent"] = "Mozilla/5.0 XmppPreviewer/1.0"
+    resp = await session.get(url)
+    title = None
+    print(url, resp.status)
+    if resp.headers["content-type"].startswith("text/html"):
+        parser = TitleExtractor()
+        while chunk := await resp.content.read(4096):
+            parser.feed(chunk.decode("utf-8")) # assume utf-8
+            if parser.latest_title:
+                title = parser.latest_title
+                break
+    resp.close()
+    await session.close()
+    return title
+
+if __name__ == "__main__":
+    async def main():
+        print(await get_preview("https://youtu.be/YUMaoIt1rDU"))
+
+    asyncio.run(main())