From ecfab16fc4632ca7c965702f2fb5cb48b968f9d7 Mon Sep 17 00:00:00 2001
From: jesopo <github@lolnerd.net>
Date: Thu, 23 Jan 2020 16:24:08 +0000
Subject: [PATCH] add !lsearch to show what !clear would remove

---
 modules/channel_op.py | 89 ++++++++++++++++++++++++++-----------------
 1 file changed, 55 insertions(+), 34 deletions(-)

diff --git a/modules/channel_op.py b/modules/channel_op.py
index 66574a57..a8199fa8 100644
--- a/modules/channel_op.py
+++ b/modules/channel_op.py
@@ -403,12 +403,46 @@ class Module(ModuleManager.BaseModule):
     def _cunmute(self, channel):
         channel.send_mode("-m")
 
-    def _filter_mask(self, mask, list):
+    def _filter_mask(self, mask, mode_list):
         parsed_mask = utils.irc.hostmask_parse(mask)
-        return list(utils.irc.hostmask_match_many(list, parsed_mask))
+        return list(utils.irc.hostmask_match_many(mode_list, parsed_mask))
     def _filter_prefix(self, prefix, list):
         return [l for l in list if prefix in l]
 
+    def _type_to_mode(self, server, channel, type):
+        if type[0] == "+":
+            if type[1:]:
+                if type[1] in channel.mode_lists:
+                    return type[1], None
+                else:
+                    raise utils.EventError("Unknown list mode")
+            else:
+                raise utils.EventError("Please provide a list mode")
+        elif type in ["quiets", "mutes"]:
+            quiet_method = self._quiet_method(server)
+            if quiet_method:
+                return quiet_method[0], quiet_method[1]
+            else:
+                raise utils.EventError(NO_QUIETS)
+        else:
+            raise utils.EventError("Unknown type '%s'" % type)
+
+    def _list_query_event(self, server, channel, args):
+        list_type = args[0]
+        list_mode, list_prefix = self._type_to_mode(server, channel, list_type)
+
+        list_mask = None
+        if len(args) > 1:
+            list_mask = args[1]
+
+        mode_list = list(channel.mode_lists[list_mode])
+        if list_prefix:
+            mode_list = self._filter_prefix(list_prefix, mode_list)
+        if list_mask:
+            mode_list = self._filter_mask(list_mask, mode_list)
+
+        return list_mode, mode_list
+
     @utils.hook("received.command.clear")
     @utils.kwarg("channel_only", True)
     @utils.kwarg("require_mode", "o")
@@ -417,39 +451,26 @@ class Module(ModuleManager.BaseModule):
     @utils.kwarg("usage", "<type> [mask]")
     @utils.kwarg("usage", "+<mode> [mask]")
     def clear(self, event):
-        list_type = event["args_split"][0]
-        list_mode = None
-        list_filter = lambda l: list(l)
+        mode, mode_list = self._list_query_event(
+            event["server"], event["target"], event["args_split"])
 
-        if list_type[0] == "+":
-            if list_type[1:]:
-                list_mode = list_type[1]
-            else:
-                raise utils.EventError("Please provide a list mode")
+        chunks = self._chunk(event["server"], mode_list)
+        for chunk in chunks:
+            event["target"].send_mode("-%s" % mode*len(chunk), chunk)
 
-        elif list_type in ["quiets", "mutes"]:
-            quiet_method = self._quiet_method(event["server"])
-            if quiet_method:
-                list_mode = quiet_method[0]
-                if quiet_method[1]:
-                    list_filter = lambda list: self._filter_prefix(
-                        quiet_method[1], list)
-            else:
-                raise utils.EventError(NO_QUIETS)
+    @utils.hook("received.command.lsearch")
+    @utils.kwarg("channel_only", True)
+    @utils.kwarg("require_mode", "o")
+    @utils.kwarg("require_access", "lsearch")
+    @utils.kwarg("help", "Search a given channel list mode (e.g. +b)")
+    @utils.kwarg("usage", "<type> [mask]")
+    @utils.kwarg("usage", "+<mode> [mask]")
+    def lsearch(self, event):
+        mode, mode_list = self._list_query_event(
+            event["server"], event["target"], event["args_split"])
 
+        if mode_list:
+            event["stdout"].write("%s: %s" %
+                (event["user"].nickname, " ".join(mode_list)))
         else:
-            raise utils.EventError("Unknown type '%s'" % type)
-
-        if list_mode in event["target"].mode_lists:
-            if len(event["args_split"]) > 1:
-                old_filter = list_filter
-                list_filter = lambda list: self._filter_mask(
-                    event["args_split"][1], old_filter(list))
-
-            mode_list = list_filter(event["target"].mode_lists[list_mode])
-
-            chunks = self._chunk(event["server"], mode_list)
-            for chunk in chunks:
-                event["target"].send_mode("-%s" % list_mode*len(chunk), chunk)
-        else:
-            raise utils.EventError("Unknown list mode")
+            event["stderr"].write("%s: no matches" % event["user"].nickname)