1 files changed, 113 insertions, 0 deletions
diff --git a/modules/aliases.py b/modules/aliases.py
new file mode 100644
index 00000000..90619908
--- /dev/null
+++ b/modules/aliases.py
@@ -0,0 +1,113 @@
+#--depends-on commands
+import re
+from src import EventManager, ModuleManager, utils
+
+REGEX_ARG_NUMBER = re.compile(r"\$(?:(\d+)(-?)|(-))")
+SETTING_PREFIX = "alias-"
+
+class Module(ModuleManager.BaseModule):
+    def _arg_replace(self, s, args_split):
+        for match in REGEX_ARG_NUMBER.finditer(s):
+            if match.group(1):
+                index = int(match.group(1))
+                continuous = match.group(2) == "-"
+                if index >= len(args_split):
+                    raise IndexError("Unknown alias arg index")
+            else:
+                index = 0
+                continuous = True
+
+            if continuous:
+                replace = " ".join(args_split[index:])
+            else:
+                replace = args_split[index]
+            s = s.replace(match.group(0), replace)
+        return s
+
+    def _get_alias(self, server, target, command):
+        setting = "%s%s" % (SETTING_PREFIX, command)
+        alias = self.bot.get_setting(setting,
+            server.get_setting(setting,
+            target.get_setting(setting, None)))
+        if not alias == None:
+            alias, _, args = alias.partition(" ")
+            return alias, args
+        return None
+    def _get_aliases(self, targets):
+        alias_list = []
+        for target in targets:
+            alias_list += target.find_settings(prefix=SETTING_PREFIX)
+
+        aliases = {}
+        for alias in alias_list:
+            alias, _, args = alias.partition(" ")
+            if not alias in aliases:
+                aliases[alias] = args or None
+        return aliases
+
+    @utils.hook("get.command")
+    @utils.kwarg("priority", EventManager.PRIORITY_URGENT)
+    def get_command(self, event):
+        alias = self._get_alias(event["server"], event["target"],
+            event["command"].command)
+        if not alias == None:
+            alias, alias_args = alias
+            event["command"].command = alias
+            event["command"].args = self._arg_replace(alias_args,
+                event["command"].args.split(" "))
+
+    @utils.hook("received.command.alias")
+    @utils.hook("received.command.calias")
+    @utils.kwarg("min_args", 1)
+    @utils.kwarg("usage", "list")
+    @utils.kwarg("usage", "add <alias> <command> [arg1 [arg2 ...]]")
+    @utils.kwarg("usage", "remove <alias>")
+    @utils.kwarg("remove_empty", False)
+    def alias(self, event):
+        target = event["server"]
+        if event["command"] == "calias":
+            if not event["is_channel"]:
+                raise utils.EventError("%scalias can only be used in-channel"
+                    % event["command_prefix"])
+            target = event["target"]
+
+        subcommand = event["args_split"][0].lower()
+        if subcommand == "list":
+            aliases = self._get_aliases([target])
+            event["stdout"].write("Available aliases: %s" %
+                ", ".join(sorted(aliases.keys())))
+
+        elif subcommand == "show":
+            if not len(event["args_split"]) > 1:
+                raise utils.EventError("Please provide an alias to remove")
+
+            alias = event["args_split"][0].lower()
+            setting = target.get_setting("%s%s" % (SETTING_PREFIX, alias), None)
+
+            if setting == None:
+                raise utils.EventError("I don't have an '%s' alias" % alias)
+            prefix = event["command_prefix"]
+            event["stdout"].write(f"{prefix}{alias}: {prefix}{setting}")
+
+        elif subcommand == "add":
+            if not len(event["args_split"]) > 2:
+                raise utils.EventError("Please provide an alias and a command")
+
+            alias = event["args_split"][1].lower()
+            command = event["args_split"][2].lower()
+            command = " ".join([command]+event["args_split"][3:])
+            target.set_setting("%s%s" % (SETTING_PREFIX, alias), command)
+
+            event["stdout"].write("Added '%s' alias" % alias)
+
+        elif subcommand == "remove":
+            if not len(event["args_split"]) > 1:
+                raise utils.EventError("Please provide an alias to remove")
+
+            alias = event["args_split"][1].lower()
+            setting = "%s%s" % (SETTING_PREFIX, alias)
+            if target.get_setting(setting, None) == None:
+                raise utils.EventError("I don't have an '%s' alias" % alias)
+
+            target.del_setting(setting)
+            event["stdout"].write("Removed '%s' alias" % alias)