Add src.utils.parse.keyvalue, mostly for IRCv3 CAP negotiation

modules/line_handler.py

@@ -247,14 +247,7 @@ class Module(ModuleManager.BaseModule):
     # the server is telling us about its capabilities!
     @utils.hook("raw.cap")
     def cap(self, event):
-        capabilities_list = event["args"][2].split(" ")
-        capabilities = {}
-        for capability in capabilities_list:
-            argument = None
-            if "=" in capability:
-                capability, argument = capability.split("=", 1)
-            capabilities[capability] = argument
-
+        capabilities = utils.parse.keyvalue(event["args"][2])
         subcommand = event["args"][1].lower()
         is_multiline = len(event["args"]) > 2 and event["args"][2] == "*"
 

src/utils/parse.py

@@ -55,3 +55,13 @@ def docstring(s: str) -> Docstring:
                         description += line
     return Docstring(description, items, var_items)
 
+def keyvalue(s, delimiter: str=" ") -> typing.Dict[str, str]:
+    items = {}
+    pairs = s.split(delimiter)
+    for pair in pairs:
+        key, sep, value = pair.partition("=")
+        if sep:
+            items[key] = value
+        else:
+            items[key] = None
+    return items