Support (un)resolving topics

tests/ui_tools/test_popups.py

@@ -6,7 +6,7 @@
 from pytest_mock import MockerFixture
 from urwid import Columns, Pile, Text, Widget
 
-from zulipterminal.api_types import Message
+from zulipterminal.api_types import RESOLVED_TOPIC_PREFIX, Message
 from zulipterminal.config.keys import is_command_key, keys_for_command
 from zulipterminal.config.ui_mappings import EDIT_MODE_CAPTIONS
 from zulipterminal.helper import CustomProfileData, TidiedUserInfo
@@ -26,6 +26,7 @@
     PopUpView,
     StreamInfoView,
     StreamMembersView,
+    TopicInfoView,
     UserInfoView,
 )
 from zulipterminal.urwid_types import urwid_Size
@@ -1604,6 +1605,52 @@ def test_checkbox_toggle_visual_notification(
         toggle_visual_notify_status.assert_called_once_with(stream_id)
 
 
+class TestTopicInfoView:
+    @pytest.fixture(autouse=True)
+    def mock_external_classes(
+        self, mocker: MockerFixture, general_stream: Dict[str, Any], topics: List[str]
+    ) -> None:
+        self.controller = mocker.Mock()
+
+        mocker.patch.object(
+            self.controller, "maximum_popup_dimensions", return_value=(64, 64)
+        )
+        mocker.patch(LISTWALKER, return_value=[])
+        self.stream_id = general_stream["stream_id"]
+        self.topic = topics[0]
+        self.controller.model.stream_dict = {self.stream_id: general_stream}
+
+        self.topic_info_view = TopicInfoView(
+            self.controller, self.stream_id, self.topic
+        )
+
+    @pytest.mark.parametrize(
+        "topic_name, expected_topic_button_label",
+        [
+            ("hi!", "Resolve Topic"),
+            (f"{RESOLVED_TOPIC_PREFIX}" + "hi!", "Unresolve Topic"),
+        ],
+    )
+    def test_topic_button_label(
+        self, topic_name: str, expected_topic_button_label: str
+    ) -> None:
+        topic_info_view = TopicInfoView(self.controller, self.stream_id, topic_name)
+        assert (
+            topic_info_view.resolve_topic_setting_button_label
+            == expected_topic_button_label
+        )
+
+    def test_toggle_resolve_status(self) -> None:
+        resolve_button = self.topic_info_view.widgets[-1]
+        resolve_button._emit("click")
+
+        self.controller.model.toggle_topic_resolve_status.assert_called_once_with(
+            stream_id=self.stream_id, topic_name=self.topic
+        )
+
+        self.controller.exit_popup.assert_called_once()
+
+
 class TestStreamMembersView:
     @pytest.fixture(autouse=True)
     def mock_external_classes(self, mocker: MockerFixture) -> None:

zulipterminal/ui_tools/views.py

@@ -10,7 +10,7 @@
 import urwid
 from typing_extensions import Literal
 
-from zulipterminal.api_types import EditPropagateMode, Message
+from zulipterminal.api_types import RESOLVED_TOPIC_PREFIX, EditPropagateMode, Message
 from zulipterminal.config.keys import (
     HELP_CATEGORIES,
     KEY_BINDINGS,
@@ -25,6 +25,7 @@
     COLUMN_TITLE_BAR_LINE,
     PINNED_STREAMS_DIVIDER,
     SECTION_DIVIDER_LINE,
+    STREAM_TOPIC_SEPARATOR,
 )
 from zulipterminal.config.ui_mappings import (
     BOT_TYPE_BY_ID,
@@ -1569,6 +1570,65 @@ def keypress(self, size: urwid_Size, key: str) -> str:
         return super().keypress(size, key)
 
 
+class TopicInfoView(PopUpView):
+    def __init__(self, controller: Any, stream_id: int, topic: str) -> None:
+        self.stream_id = stream_id
+        self.controller = controller
+        stream = controller.model.stream_dict[stream_id]
+        self.topic_name = topic
+        stream_name = stream["name"]
+
+        title = f"{stream_name} {STREAM_TOPIC_SEPARATOR} {self.topic_name}"
+
+        topic_info_content: PopUpViewTableContent = []
+
+        popup_width, column_widths = self.calculate_table_widths(
+            topic_info_content, len(title)
+        )
+
+        if self.topic_name.startswith(RESOLVED_TOPIC_PREFIX):
+            self.resolve_topic_setting_button_label = "Unresolve Topic"
+        else:
+            self.resolve_topic_setting_button_label = "Resolve Topic"
+        resolve_topic_setting = urwid.Button(
+            self.resolve_topic_setting_button_label,
+            self.toggle_resolve_status,
+        )
+
+        curs_pos = len(self.resolve_topic_setting_button_label) + 1
+        # This shifts the cursor present over the first character of
+        # resolve_topic_button_setting label to last character + 1 so that it isn't
+        # visible
+
+        resolve_topic_setting._w = urwid.AttrMap(
+            urwid.SelectableIcon(
+                self.resolve_topic_setting_button_label, cursor_position=curs_pos
+            ),
+            None,
+            "selected",
+        )
+
+        # Manual because calculate_table_widths does not support buttons.
+        # Add 4 to button label to accommodate the buttons itself.
+        popup_width = max(
+            popup_width,
+            len(resolve_topic_setting.label) + 4,
+        )
+
+        self.widgets = self.make_table_with_categories(
+            topic_info_content, column_widths
+        )
+
+        self.widgets.append(resolve_topic_setting)
+        super().__init__(controller, self.widgets, "TOPIC_INFO", popup_width, title)
+
+    def toggle_resolve_status(self, args: Any) -> None:
+        self.controller.model.toggle_topic_resolve_status(
+            stream_id=self.stream_id, topic_name=self.topic_name
+        )
+        self.controller.exit_popup()
+
+
 class MsgInfoView(PopUpView):
     def __init__(
         self,