Allow additional information elements in MucInfoWin same as ConversationInfoWin

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

poezio/tabs/muctab.py

@@ -52,6 +52,7 @@ class MucTab(ChatTab):
     message_type = 'groupchat'
     plugin_commands = {}  # type: Dict[str, Command]
     plugin_keys = {}  # type: Dict[str, Callable]
+    additional_information = {}  # type: Dict[str, Callable[[str], str]]
 
     def __init__(self, core, jid, nick, password=None):
         ChatTab.__init__(self, core, jid)
@@ -106,6 +107,20 @@ class MucTab(ChatTab):
             return last_message.time
         return None
 
+    @staticmethod
+    def add_information_element(plugin_name: str, callback: Callable[[str], str]) -> None:
+        """
+        Lets a plugin add its own information to the MucInfoWin
+        """
+        MucTab.additional_information[plugin_name] = callback
+
+    @staticmethod
+    def remove_information_element(plugin_name: str) -> None:
+        """
+        Lets a plugin add its own information to the MucInfoWin
+        """
+        del MucTab.additional_information[plugin_name]
+
     def cancel_config(self, form):
         """
         The user do not want to send his/her config, send an iq cancel
@@ -440,7 +455,9 @@ class MucTab(ChatTab):
         if self.core.tabs.current_tab is self:
             self.text_win.refresh()
             self.user_win.refresh_if_changed(self.users)
-            self.info_header.refresh(self, self.text_win, user=self.own_user)
+            self.info_header.refresh(
+                self, self.text_win, user=self.own_user,
+                information=MucTab.additional_information)
             self.input.refresh()
             self.core.doupdate()
 
@@ -1225,7 +1242,9 @@ class MucTab(ChatTab):
         if display_user_list:
             self.v_separator.refresh()
             self.user_win.refresh(self.users)
-        self.info_header.refresh(self, self.text_win, user=self.own_user)
+        self.info_header.refresh(
+            self, self.text_win, user=self.own_user,
+            information=MucTab.additional_information)
         self.refresh_tab_win()
         if display_info_win:
             self.info_win.refresh()

poezio/windows/info_wins.py

@@ -257,7 +257,7 @@ class MucInfoWin(InfoWin):
     def __init__(self):
         InfoWin.__init__(self)
 
-    def refresh(self, room, window=None, user=None):
+    def refresh(self, room, window=None, user=None, information=None):
         log.debug('Refresh: %s', self.__class__.__name__)
         self._win.erase()
         self.write_room_name(room)
@@ -265,11 +265,22 @@ class MucInfoWin(InfoWin):
         self.write_own_nick(room)
         self.write_disconnected(room)
         self.write_role(room, user)
+        if information:
+            self.write_additional_information(information, room)
         if window:
             self.print_scroll_position(window)
         self.finish_line(get_theme().COLOR_INFORMATION_BAR)
         self._refresh()
 
+    def write_additional_information(self, information, jid):
+        """
+        Write all information added by plugins by getting the
+        value returned by the callbacks.
+        """
+        for key in information:
+            self.addstr(information[key](jid),
+                        to_curses_attr(get_theme().COLOR_INFORMATION_BAR))
+
     def write_room_name(self, room):
         self.addstr('[', to_curses_attr(get_theme().COLOR_INFORMATION_BAR))
         self.addstr(room.name,