From d6886369097c2942ffcc032f2a0eff2e6c4ff14c Mon Sep 17 00:00:00 2001
From: jesopo <github@lolnerd.net>
Date: Sat, 30 Nov 2019 19:32:38 +0000
Subject: [PATCH] rework permissions module to precompile hostmasks

---
 modules/permissions/__init__.py | 23 ++++++++++++++---------
 src/IRCServer.py                |  4 ----
 src/utils/irc.py                | 23 ++++++++++++++++-------
 3 files changed, 30 insertions(+), 20 deletions(-)

diff --git a/modules/permissions/__init__.py b/modules/permissions/__init__.py
index 6b05dfdc..702666af 100644
--- a/modules/permissions/__init__.py
+++ b/modules/permissions/__init__.py
@@ -12,13 +12,19 @@ class Module(ModuleManager.BaseModule):
 
     @utils.hook("new.server")
     def new_server(self, event):
-        hostmasks = {}
+        event["server"]._hostmasks = {}
 
         for account, user_hostmasks in event["server"].get_all_user_settings(
                 HOSTMASKS_SETTING):
             for hostmask in user_hostmasks:
-                hostmasks[hostmask] = account
-        event["server"]._hostmasks = hostmasks
+                self._add_hostmask(event["server"], hostmask, account)
+
+    def _add_hostmask(self, server, hostmask, account):
+        server._hostmasks[hostmask] = (
+            utils.irc.parse_hostmask(hostmask), account)
+    def _remove_hostmask(self, server, hostmask):
+        if hostmask in server._hostmasks:
+            del server._hostmasks[hostmask]
 
     def _make_salt(self):
         return base64.b64encode(os.urandom(64)).decode("utf8")
@@ -55,9 +61,9 @@ class Module(ModuleManager.BaseModule):
 
     def _find_hostmask(self, server, user):
         user_hostmask = user.hostmask()
-        for hostmask in server._hostmasks.keys():
-            if utils.irc.hostmask_match(user_hostmask, hostmask):
-                return (hostmask, server._hostmasks[hostmask])
+        for hostmask, (hostmask_pattern, account) in server._hostmasks.items():
+            if utils.irc.hostmask_match(user_hostmask, hostmask_pattern):
+                return (hostmask, account)
     def _specific_hostmask(self, server, hostmask, account):
         for user in server.users.values():
             if utils.irc.hostmask_match(user.hostmask(), hostmask):
@@ -300,7 +306,7 @@ class Module(ModuleManager.BaseModule):
                 event["user"].set_setting(HOSTMASKS_SETTING, hostmasks)
 
                 self._specific_hostmask(event["server"], hostmask, account)
-                event["server"]._hostmasks[hostmask] = account
+                self._add_hostmask(event["server"], hostmask, account)
 
                 event["stdout"].write("Added %s to your hostmasks" % hostmask)
             elif subcommand == "remove":
@@ -312,8 +318,7 @@ class Module(ModuleManager.BaseModule):
                 event["user"].set_setting(HOSTMASKS_SETTING, hostmasks)
 
                 self._specific_hostmask(event["server"], hostmask, None)
-                if hostmask in event["server"]._hostmasks:
-                    del event["server"]._hostmasks[hostmask]
+                self._remove_hostmask(event["server"], hostmask)
 
                 event["stdout"].write("Removed %s from your hostmasks"
                     % hostmask)
diff --git a/src/IRCServer.py b/src/IRCServer.py
index 053a8bfa..1e069e5f 100644
--- a/src/IRCServer.py
+++ b/src/IRCServer.py
@@ -221,10 +221,6 @@ class Server(IRCObject.Object):
     def irc_equals(self, s1: str, s2: str) -> bool:
         return utils.irc.equals(self.case_mapping, s1, s2)
 
-    def hostmask_match(self, hostmask: str, pattern: str) -> bool:
-        return utils.irc.hostmask_match(self.irc_lower(hostmask),
-            self.irc_lower(pattern))
-
     def _post_read(self, lines: typing.List[str]):
         for line in lines:
             self.bot.log.debug("%s (raw recv) | %s", [str(self), line])
diff --git a/src/utils/irc.py b/src/utils/irc.py
index 64c0fd1c..153d6405 100644
--- a/src/utils/irc.py
+++ b/src/utils/irc.py
@@ -1,4 +1,4 @@
-import json, string, re, typing, uuid
+import dataclasses, json, string, re, typing, uuid
 from . import consts
 
 ASCII_UPPER = string.ascii_uppercase
@@ -262,19 +262,28 @@ class BatchType(object):
         t = list(set([type])&self._names)
         return t[0] if t else None
 
-def hostmask_match_many(hostmasks: typing.List[str], pattern: str
-        ) -> typing.Optional[str]:
+@dataclasses.dataclass
+class HostmaskPattern(object):
+    original: str
+    pattern: typing.Pattern
+
+    def match(self, hostmask: str):
+        return bool(self.pattern.fullmatch(hostmask))
+def hostmask_parse(hostmask: str):
     part1_out = []
-    for part1 in pattern.split("?"):
+    for part1 in hostmask.split("?"):
         part2_out = []
         for part2 in part1.split("*"):
             part2_out.append(re.escape(part2))
         part1_out.append(".*".join(part2_out))
-    pattern_re = re.compile(".".join(part1_out))
+    return HostmaskPattern(hostmask, re.compile(".".join(part1_out)))
+
+def hostmask_match_many(hostmasks: typing.List[str], pattern: HostmaskPattern,
+        ) -> typing.Optional[str]:
     for hostmask in hostmasks:
-        if pattern_re.match(hostmask):
+        if pattern.match(hostmask):
             return hostmask
     return None
 
-def hostmask_match(hostmask: str, pattern: str) -> bool:
+def hostmask_match(hostmask: str, pattern: HostmaskPattern) -> bool:
     return not hostmask_match_many([hostmask], pattern) == None