React with count emoji

read_mattermost.py

@@ -7,6 +7,7 @@ import datetime
 import threading
 from time import sleep
 import json
+from typing import Optional
 import mattermost
 import mattermost.ws
 
@@ -33,6 +34,8 @@ TOKEN = os.getenv("MM_ACCESS_TOKEN")
 USER = os.getenv("MM_USERNAME")
 PASSWORD = os.getenv("MM_PASSWORD")
 
+CONFIRMATION_EMOJI = True
+
 
 try:
 	since_arg_i = sys.argv.index("--since")
@@ -42,8 +45,14 @@ except ValueError:
 if since_arg_i:
 	SINCE = datetime.datetime.fromisoformat(sys.argv[since_arg_i + 1])
 
+clean = "--clean" in sys.argv[1:]
+live = "--live" in sys.argv[1:]
+if "--no-confirm" in sys.argv[1:]:
+	CONFIRMATION_EMOJI = None
 
-if sys.stdout.isatty():
+
+
+if not clean and sys.stdout.isatty():
 	print("To use this data, redirect stdout to a file and use table.py on it.", file=sys.stderr)
 
 
@@ -64,6 +73,8 @@ else:
 	assert PASSWORD
 	mm.login(USER, PASSWORD)
 
+our_user_id = mm._my_user_id
+
 
 ##################################
 # Get channel
@@ -98,8 +109,8 @@ def get_username(userid):
 ##################################
 # Get posts
 posts = {}
-def get_post(postid):
-	if postid not in posts:
+def get_post(postid, force_fetch=False):
+	if postid not in posts or force_fetch:
 		posts[postid] = mm.get_post(postid)
 
 	return posts[postid]
@@ -116,7 +127,7 @@ def reaction_qualifies(reaction):
 	return reaction["emoji_name"] == EMOJI_NAME and reaction["user_id"] in tagger_ids
 
 
-awarded = defaultdict(set)
+awarded = {} # awarded[awardee][post_id]: set of verifiers
 def award_if_appropriate(reaction):
 	if not reaction_qualifies(reaction):
 		return
@@ -125,17 +136,28 @@ def award_if_appropriate(reaction):
 	if parse_mm_timestamp(post["create_at"]) < SINCE:
 		return
 
+	awardee_id = post["user_id"]
 	awarder_id = reaction["user_id"]
-	if awarder_id in awarded[post["id"]]:
+
+	if awardee_id not in awarded:
+		awarded[awardee_id] = {}
+	if post["id"] not in awarded[awardee_id]:
+		awarded[awardee_id][post["id"]] = set()
+
+	if awarder_id in awarded[awardee_id][post["id"]]:
+		# We already knew that this user verified this post
 		return
-	awarded[post["id"]].add(awarder_id)
+
+	awarded[awardee_id][post["id"]].add(awarder_id)
 
 	reaction_time = parse_mm_timestamp(reaction["create_at"]).isoformat(timespec="microseconds")
 	post_time = parse_mm_timestamp(reaction["create_at"]).isoformat(timespec="microseconds")
-	awardee = get_username(post["user_id"])
+	awardee = get_username(awardee_id)
 	awarder = get_username(awarder_id)
 	print(f"{awardee} {post['id']} at {post_time} verified by {awarder} at {reaction_time}", flush=True)
 
+	update_confirmation(post["id"])
+
 
 def retract_if_appropriate(reaction):
 	if not reaction_qualifies(reaction):
@@ -145,13 +167,21 @@ def retract_if_appropriate(reaction):
 	if parse_mm_timestamp(post["create_at"]) < SINCE:
 		return
 
+	awardee_id = post["user_id"]
 	awarder_id = reaction["user_id"]
-	awarded[post["id"]].discard(awarder_id)
+	awarded[awardee_id][post["id"]].discard(awarder_id)
 
-	awardee = get_username(post["user_id"])
+	if not awarded[awardee_id][post["id"]]:
+		del awarded[awardee_id][post["id"]]
+	if not awarded[awardee_id]:
+		del awarded[awardee_id]
+
+	awardee = get_username(awardee_id)
 	awarder = get_username(awarder_id)
 	print(f"{awardee} {post['id']} verification removed by {awarder}", flush=True)
 
+	update_confirmation(post["id"])
+
 
 def get_posts_for_channel(mmapi, channel_id, since, **kwargs):
 	after = None
@@ -171,8 +201,53 @@ def get_posts_for_channel(mmapi, channel_id, since, **kwargs):
 		after = order[-1]
 
 
+CONFIRMATION_EMOJI_NAMES = "one,two,three,four,five,six,seven,eight,nine,keycap_ten,asterisk".split(",")
+def confirmation_emoji_name(count):
+	if count < 0:
+		return "exclamation"
+	try:
+		return CONFIRMATION_EMOJI_NAMES[count - 1]
+	except IndexError:
+		return CONFIRMATION_EMOJI_NAMES[-1]
+
+
+def persevere(f, backoff=1):
+	while True:
+		try:
+			f()
+			return
+		except Exception as e:
+			print(e, file=sys.stderr)
+		print(f"Trying again in {backoff} second(s)", file=sys.stderr)
+		sleep(backoff)
+
+
+def update_confirmation(post_id):
+	if not CONFIRMATION_EMOJI:
+		return
+
+	post = get_post(post_id, force_fetch=True)
+	remove_reactions_from_post(post)
+
+	new_count = len(awarded.get(post["user_id"], []))
+
+	if new_count > 0:
+		persevere(lambda: mm.create_reaction(our_user_id, post_id, confirmation_emoji_name(new_count)))
+
+
+def remove_reactions_from_post(post):
+	for reaction in post.get("metadata", {}).get("reactions", []):
+		if reaction["user_id"] == our_user_id:
+			persevere(lambda: remove_reaction(post["id"], reaction["emoji_name"]))
+
+
+def remove_reaction(post_id, emoji_name):
+	mm._delete(f"/v4/users/me/posts/{post_id}/reactions/{emoji_name}")
+
+
 def handle_backlog(since):
 	for post in get_posts_for_channel(mm, channel, since):
+		remove_reactions_from_post(post)
 		for reaction in post.get("metadata", {}).get("reactions", []):
 			award_if_appropriate(reaction)
 
@@ -192,17 +267,20 @@ def handle_live():
 		sleep(60 * 1000)
 
 
-live = "--live" in sys.argv[1:]
-
-# Note: skipping this step and updating an existing file would be dangerous: you would miss revocations that happened while not listening.
-handle_backlog(SINCE)
-
-if live:
-	print("Now watching for live posts.", file=sys.stderr)
-	handle_live()
+if clean:
+	for post in get_posts_for_channel(mm, channel, SINCE):
+		remove_reactions_from_post(post)
 
 else:
-	print("Use --live to keep watching new posts.", file=sys.stderr)
+	# Note: skipping this step and updating an existing file would be dangerous: you would miss revocations that happened while not listening.
+	handle_backlog(SINCE)
+
+	if live:
+		print("Now watching for live posts.", file=sys.stderr)
+		handle_live()
+
+	else:
+		print("Use --live to keep watching new posts.", file=sys.stderr)
 
 
 # Logout