rewrite message_filter.py to handle both message rejection and pattern replace
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jesopo
parent
f0007a760c
commit
68e25a61bf
1 changed files with 68 additions and 52 deletions
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@ -6,6 +6,27 @@ from src import ModuleManager, utils
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class Module(ModuleManager.BaseModule):
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_name = "Filter"
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def _split(self, s):
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backslash = False
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forward_slash = []
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for i, c in enumerate(s):
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if not backslash:
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if c == "/":
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forward_slash.append(i)
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if c == "\\":
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backslash = True
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else:
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backslash = False
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if forward_slash and (not forward_slash[-1] == (len(s)-1)):
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forward_slash.append(len(s))
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last = 0
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out = []
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for i in forward_slash:
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out.append(s[last:i])
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last = i+1
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return out
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def _get_filters(self, server, target):
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filters = server.get_setting("message-filters", [])
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filters.extend(target.get_setting("message-filters", []))
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@ -14,7 +35,9 @@ class Module(ModuleManager.BaseModule):
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@utils.hook("preprocess.send.privmsg")
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@utils.hook("preprocess.send.notice")
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def channel_message(self, event):
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message = utils.irc.strip_font(event["line"].args[1])
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message = event["line"].args[1]
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message_plain = utils.irc.strip_font(message)
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original_message = message
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target_name = event["line"].args[0]
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# strip off any STATUSMSG chars
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@ -27,61 +50,54 @@ class Module(ModuleManager.BaseModule):
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filters = self._get_filters(event["server"], target)
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for filter in filters:
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if re.search(filter, message):
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self.log.info("Message matched filter, dropping: %s"
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% event["line"].format())
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event["line"].invalidate()
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break
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def _filter(self, target, args):
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subcommand = args[0]
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arg = args[1] if len(args) > 1 else None
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message_filters = target.get_setting("message-filters", [])
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if subcommand == "list":
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if not arg:
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return "%d filters in place" % len(message_filters)
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else:
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index = int(arg)
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return "Filter %d: %s" % (index, message_filters[index])
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elif subcommand == "add":
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if arg == None:
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raise TypeError()
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message_filters = set(message_filters)
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message_filters.add(arg)
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target.set_setting("message-filters", list(message_filters))
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return "Added filter"
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elif subcommand == "remove":
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if arg == None:
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raise TypeError()
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index = int(arg)
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message_filters = list(message_filters)
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filter = message_filters.pop(index)
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target.set_setting("message-filters", message_filters)
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return "Removed filter: %s" % filter
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else:
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return None
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type, pattern, *args = self._split(filter)
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if type == "m":
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if re.search(pattern, message_plain):
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self.log.info("Message matched filter, dropping: %s"
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% event["line"].format())
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event["line"].invalidate()
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return
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elif type == "s":
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replace, *args = args
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message = re.sub(pattern, replace, message)
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if not message == message_plain:
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event["line"].args[1] = message
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@utils.hook("received.command.cfilter", min_args=1)
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@utils.kwarg("help", "Add a message filter for the current channel")
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@utils.kwarg("permissions", "cfilter")
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@utils.spec("!'list ?<index>int")
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@utils.spec("!'add ?<m/pattern/>string|<s/pattern/replace/>string")
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@utils.spec("!'remove !<index>int")
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def cfilter(self, event):
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"""
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:help: Add a message filter for the current channel
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:usage: list
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:usage: add <regex>
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:usage: remove <index>
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:permission: cfilter
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"""
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# mark output as "assured" so it can bypass filtering
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event["stdout"].assure()
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event["stderr"].assure()
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target = event["target"]
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filters = target.get_setting("message-filters", [])
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try:
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out = self._filter(event["target"], event["args_split"])
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event["stdout"].write(out)
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except TypeError as e:
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event["stderr"].write("Please provide an argument")
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except ValueError:
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event["stderr"].write("Indexes must be numbers")
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except IndexError:
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event["stderr"].write("Unknown index")
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if event["spec"][0] == "list":
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if event["spec"][1]:
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if not len(filters) > event["spec"][1]:
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raise utils.EventError("Filter index %d doesn't exist"
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% event["spec"][1])
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event["stdout"].write("Message filter %d: %s"
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% (event["spec"][1], filters[event["spec"][1]]))
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else:
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s = ", ".join(
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f"({i}) {s}" for i, s in enumerate(filters))
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event["stdout"].write("Message filters: %s" % s)
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elif event["spec"][0] == "add":
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filters.append(event["spec"][1])
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target.set_setting("message-filters", filters)
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event["stdout"].write("Added filter %d" % (len(filters)-1))
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elif event["spec"][0] == "remove":
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if not filters:
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raise utils.EventError("No filters")
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removed = filters.pop(event["spec"][1])
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target.set_setting("message-filters", filters)
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event["stdout"].write("Removed filter %d: %s" %
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(event["spec"][1], removed))
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