contrib: add irc bot stuff

Add a small script to install a sourcehut webhook that triggers on
patchset reception.

Add a limnoria (supybot fork) plugin to receive the webhook requests and
send IRC NOTICE messages on the proper channels.

Signed-off-by: Robin Jarry <robin@jarry.cc>
Acked-by: Bence Ferdinandy <bence@ferdinandy.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/contrib/ircbot/Sourcehut/plugin.py b/contrib/ircbot/Sourcehut/plugin.py
new file mode 100644
index 00000000..d66c1029
--- /dev/null
+++ b/contrib/ircbot/Sourcehut/plugin.py
@@ -0,0 +1,80 @@
+import json
+
+from supybot import ircmsgs, callbacks, httpserver, log, world
+from supybot.ircutils import bold, italic, underline
+
+
+class Sourcehut(callbacks.Plugin):
+    """
+    Supybot plugin to receive Sourcehut webhooks
+    """
+    def __init__(self, irc):
+        super().__init__(irc)
+        httpserver.hook("sourcehut", SourcehutServerCallback(self))
+
+    def die(self):
+        httpserver.unhook("sourcehut")
+        super().die()
+
+    def announce(self, channel, message):
+        libera = world.getIrc("libera")
+        if libera is None:
+            print("error: no irc libera")
+            return
+        if channel not in libera.state.channels:
+            print(f"error: not in {channel} channel")
+            return
+        libera.sendMsg(ircmsgs.notice(channel, message))
+
+
+class SourcehutServerCallback(httpserver.SupyHTTPServerCallback):
+    name = "Sourcehut"
+    defaultResponse = "Bad request\n"
+
+    def __init__(self, plugin: Sourcehut):
+        super().__init__()
+        self.plugin = plugin
+
+    SUBJECT = "[PATCH {prefix} v{version}] {subject}"
+    URL = "https://lists.sr.ht/{list[owner][canonicalName]}/{list[name]}/patches/{id}"
+    CHANS = {
+        "#public-inbox": "##rjarry",
+        "#aerc-devel": "#aerc",
+    }
+
+    def doPost(self, handler, path, form=None):
+        if hasattr(form, "decode"):
+            form = form.decode("utf-8")
+        print(f"POST {path} {form}")
+        try:
+            body = json.loads(form)
+            hook = body["data"]["webhook"]
+            if hook["event"] == "PATCHSET_RECEIVED":
+                patchset = hook["patchset"]
+                subject = self.SUBJECT.format(**patchset)
+                url = self.URL.format(**patchset)
+                if not url.startswith("https://lists.sr.ht/~rjarry/"):
+                    raise ValueError("unknown list")
+                channel = f"#{patchset['list']['name']}"
+                channel = self.CHANS.get(channel, channel)
+                submitter = patchset["submitter"]["canonicalName"]
+                msg = f"received {bold(subject)} from {italic(submitter)}: {underline(url)}"
+                self.plugin.announce(channel, msg)
+                handler.send_response(200)
+                handler.end_headers()
+                handler.wfile.write(b"")
+                return
+
+            raise ValueError("unsupported webhook: %r" % hook)
+
+        except Exception as e:
+            print("ERROR", e)
+            handler.send_response(400)
+            handler.end_headers()
+            handler.wfile.write(b"Bad request\n")
+
+    def log_message(self, format, *args):
+        pass
+
+
+Class = Sourcehut