Add Encyclopaedia.set_entry, emit EncEntry viewed callback when viewe…

…d status is changed, not just after Actions

encyclopaedia/actions_ren.py

@@ -1,16 +1,14 @@
+from typing import TYPE_CHECKING
+
 from .constants_ren import SortMode
+from .types_ren import ENTRY_TYPE
 
 import renpy.exports as renpy
 from renpy.store import DictEquality
 from renpy.ui import Action
 
-from typing import TYPE_CHECKING
-
 if TYPE_CHECKING:  # pragma: no cover
     from .encyclopaedia_ren import Encyclopaedia
-    from .encentry_ren import EncEntry
-
-from .book import Book
 
 """renpy
 init python:
@@ -38,54 +36,14 @@ class SetEntry(EncyclopaediaAction):
         encyclopaedia: The Encyclopaedia instance to use.
         entry: The entry to be made active.
     """
-    def __init__(self, encyclopaedia: 'Encyclopaedia', entry: 'EncEntry') -> None:
+    def __init__(self, encyclopaedia: 'Encyclopaedia', entry: ENTRY_TYPE) -> None:
         super().__init__(encyclopaedia)
 
         self.entry = entry
 
-    def _get_entry_index(self) -> int:
-        # Find the position of the entry
-        if self.enc.show_locked_entry:
-            target_position = self.enc.all_entries.index(self.entry)
-        else:
-            target_position = self.enc.unlocked_entries.index(self.entry)
-
-        return target_position
-
-    def set_entry(self) -> None:
-        """Set the Entry as active and update the Encyclopaeda's internal state."""
-        target_position = self._get_entry_index()
-
-        # The active entry is set to whichever list position was found.
-        self.enc.active = self.entry
-
-        if self.enc.active.locked is False:
-            if not isinstance(self.entry, Book):
-                if self.entry.viewed is False:
-                    # Run the callback, if provided.
-                    self.entry.emit("viewed")
-                # Mark the entry as viewed.
-                self.enc.active.viewed = True
-
-            # When setting a Book, set the first page to viewed, not the Book.
-            elif isinstance(self.entry, Book):
-                self.entry.active.viewed = True
-                self.entry.active.emit("viewed")
-
-        # When sorting by Unread, setting an entry marks is as read.
-        # Thus we have to resort the entries to ensure they appear in the
-        # correct order.
-        if self.enc.sorting_mode.value == SortMode.UNREAD.value:
-            self.enc.sort_entries(
-                entries=self.enc.current_entries,
-                sorting=self.enc.sorting_mode.value,
-            )
-
-        self.enc.current_position = target_position
-
     def __call__(self) -> None:
         """Used by Ren'Py to invoke this Action."""
-        self.set_entry()
+        self.enc.set_entry(self.entry)
 
         # Show the entry screen associated with the encyclopaedia.
         renpy.show_screen(self.enc.entry_screen, enc=self.enc)

encyclopaedia/encentry_ren.py

@@ -182,8 +182,12 @@ def viewed(self, new_value: bool) -> None:
         if self.viewed_persistent:
             setattr(persistent, self._name + "_viewed", new_value)
 
+        if self._viewed is False and new_value is True:
+            self.emit("viewed")
+
         self._viewed = new_value
 
+
     @property
     def current_page(self) -> 'EncEntry':
         """Get the sub-page that's currently viewing viewed.

encyclopaedia/encyclopaedia_ren.py

@@ -17,11 +17,10 @@
     ToggleShowLockedEntryAction,
 )
 from .entry_sorting_ren import push_locked_to_bottom
-from .exceptions_ren import AddEntryError
+from .exceptions_ren import AddEntryError, UnknownEntryError
 from .eventemitter_ren import EventEmitter
 from .constants_ren import Direction, SortMode
 from .book import Book
-
 from .types_ren import ENTRY_TYPE
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -115,12 +114,17 @@ def __str__(self) -> str:  # NOQA D105
 
     def __len__(self) -> int:
         """The total number of entries, relative to if locked ones are shown or not."""
-        rv = len(self.unlocked_entries)
-        if self.show_locked_entry:
-            rv = len(self.all_entries)
-
+        rv = len(self.viewable_entries)
         return rv
 
+    @property
+    def viewable_entries(self):
+        """Get the list of entries which are currently viewable."""
+        if self.show_locked_entry:
+            return self.all_entries
+        else:
+            return self.unlocked_entries
+
     @property
     def current_entries(self) -> list[ENTRY_TYPE]:
         """Get all the entries which should be visible to the user.
@@ -148,10 +152,7 @@ def current_entry(self) -> ENTRY_TYPE:
         Return:
             EncEntry
         """
-        entry = self.unlocked_entries[self.current_position]
-        if self.show_locked_entry:
-            entry = self.all_entries[self.current_position]
-
+        entry = self.viewable_entries[self.current_position]
         return entry
 
     @property
@@ -311,8 +312,73 @@ def _build_subject_filter(self, subject: str) -> None:
 
         self.filtered_entries = [i for i in entries if i.subject == subject]
 
+    def _change_active_entry_viewed_status(self) -> bool:
+        """Change the viewed status of the active Entry.
+
+        Return:
+            True if status was changed, else False
+        """
+        if self.active is None:
+            raise ValueError(
+                'Tried to change active entry viewed status with no active entry.',
+            )
+        if self.active.locked is False:
+            entry = None
+
+            if isinstance(self.active, Book):
+                # When Book, set the first page to viewed, not the Book.
+                entry = self.active.active
+            else:
+                entry = self.active
+
+            # Mark the entry as viewed.
+            entry.viewed = True
+
+            return True
+
+        return False
+
+    def set_entry(self, entry: ENTRY_TYPE) -> None:
+        """Set an Entry as active.
+
+        Args:
+            entry: The Entry to set.
+
+        Raises:
+            ValueError: If the entry cannot be set.
+        """
+        try:
+            target_position = self.viewable_entries.index(entry)
+        except ValueError as e:
+            if entry not in self.all_entries:
+                raise UnknownEntryError(f"{entry} is not in this Encyclopaedia") from e
+            else:
+                raise ValueError(
+                    f"{entry} cannot be set because it is locked and 'show_locked_entry' is False",
+                ) from e
+
+        self.current_position = target_position
+
+        self.active = entry
+        self._change_active_entry_viewed_status()
+
+        # When sorting by Unread, setting an entry marks is as read.
+        # Thus we have to resort the entries to ensure they appear in the
+        # correct order.
+        if self.sorting_mode.value == SortMode.UNREAD.value:
+            self.sort_entries(
+                entries=self.current_entries,
+                sorting=self.sorting_mode.value,
+            )
+
     def _change_entry(self, direction: Direction) -> bool:
-        """Change the current active EncEntry."""
+        """Change the active entry by changing the index.
+
+        This is relative to the current sorting.
+
+        Args:
+            direction: The direction to move.
+        """
         test_position = self.current_position + direction.value
 
         # Boundary check
@@ -328,18 +394,7 @@ def _change_entry(self, direction: Direction) -> bool:
         # Update the active entry.
         self.active = self.current_entry
 
-        if self.active.locked is False:
-            if not isinstance(self.active, Book):
-                # Run the callback, if provided.
-                self.active.emit("viewed")
-
-                # Mark the entry as viewed.
-                self.active.viewed = True
-
-            # When setting a Book, set the first page to viewed, not the Book.
-            elif isinstance(self.active, Book):
-                self.active.active.viewed = True
-                self.active.active.emit("viewed")
+        self._change_active_entry_viewed_status()
 
         # When changing an entry, the current entry page number is reset.
         self.active._unlocked_page_index = 0

encyclopaedia/exceptions_ren.py

@@ -9,3 +9,9 @@ class AddEntryError(Exception):
 
 class GetEntryError(Exception):
     """Raised when getting an entry fails."""
+    pass
+
+
+class UnknownEntryError(Exception):
+    """Raised when looking for an entry that is not in an Encyclopaedia."""
+    pass

tests/encyclopaedia/test_set_entry.py

@@ -0,0 +1,48 @@
+from encyclopaedia import Encyclopaedia
+from encyclopaedia import EncEntry
+from encyclopaedia.exceptions_ren import UnknownEntryError
+
+import pytest
+
+
+def test__change_active_entry_viewed_status_no_active():
+    enc = Encyclopaedia()
+
+    EncEntry(
+        parent=enc,
+        name="Test Name",
+        text=["Test Text"],
+    )
+
+    with pytest.raises(ValueError):
+        enc._change_active_entry_viewed_status()
+
+
+def test__change_active_entry_viewed_status_locked_entry():
+    enc = Encyclopaedia()
+
+    e = EncEntry(
+        parent=enc,
+        name="Test Name",
+        text=["Test Text"],
+        locked=True,
+    )
+
+    enc.active = e
+
+    result = enc._change_active_entry_viewed_status()
+    assert result is False
+
+
+def test_set_entry_unknown_entry():
+    enc = Encyclopaedia()
+    another_enc = Encyclopaedia()
+
+    e = EncEntry(
+        parent=enc,
+        name="Test Name",
+        text=["Test Text"],
+    )
+
+    with pytest.raises(UnknownEntryError):
+        another_enc.set_entry(e)