notes: limit number of notes for an user

config.json.example

@@ -42,7 +42,9 @@
       "commands": ["note down"],
       "content_regex": "for (?P<target>\\S+) (?P<note>.+)",
       "confirmation": "Ok.",
-      "deliver_format": "{dest}, {sender} tells you: {message}"
+      "deliver_format": "{dest}, {sender} tells you: {message}",
+      "limit": 5,
+      "too_many_notes": "There are too many notes for this user."
     },
     "random": {
       "commands": ["choose"],

edmond/plugins/notes.py

@@ -5,7 +5,10 @@ from edmond.plugin import Plugin
 
 class NotesPlugin(Plugin):
 
-    REQUIRED_CONFIGS = ["commands", "content_regex", "deliver_format"]
+    REQUIRED_CONFIGS = [
+        "commands", "content_regex", "confirmation", "deliver_format", "limit",
+        "too_many_notes"
+    ]
 
     def __init__(self, bot):
         super().__init__(bot)
@@ -48,6 +51,12 @@ class NotesPlugin(Plugin):
             if any(k not in groups for k in ("target", "note")):
                 return False
             target = groups["target"]
+
+            # Check we did not reach our note limits.
+            if self.count_user_notes(target) >= self.config["limit"]:
+                self.bot.say(event.target, self.config["too_many_notes"])
+                return True
+
             message = groups["note"]
             self.bot.log_d(f"Noting for {target}: {message}")
             note = {
@@ -57,3 +66,8 @@ class NotesPlugin(Plugin):
             }
             self.append_storage_list_value("notes", note)
             self.bot.say(event.target, self.config["confirmation"])
+
+    def count_user_notes(self, nick):
+        """Count the number of undelivered notes this user has."""
+        notes = self.get_storage_value("notes", [])
+        return sum(note["dest"] == nick for note in notes)