plug new answering code in

This is not the way the code is intended to be used, but making it
conform to the existing API allows us to exercise the existing unit
tests and provides partial backwards compatibility.

- Leech handling is currently broken
- Fix answered_at in wrong units, and not being used

pylib/.pylintrc

@@ -5,6 +5,7 @@ persistent = no
 [TYPECHECK]
 ignored-classes=
   FormatTimespanIn,
+  AnswerCardIn,
   UnburyCardsInCurrentDeckIn,
   BuryOrSuspendCardsIn
 

pylib/anki/scheduler.py

@@ -15,8 +15,8 @@ from anki import hooks
 from anki.cards import Card
 from anki.consts import *
 from anki.decks import Deck, DeckConfig, DeckManager, DeckTreeNode, QueueConfig
-from anki.lang import FormatTimeSpan
 from anki.notes import Note
+from anki.types import assert_exhaustive
 from anki.utils import from_json_bytes, ids2str, intTime
 
 CongratsInfo = _pb.CongratsInfoOut
@@ -476,42 +476,33 @@ limit ?"""
         card.flush()
 
     def _answerCard(self, card: Card, ease: int) -> None:
-        if self._previewingCard(card):
-            self._answerCardPreview(card, ease)
-            return
-
-        card.reps += 1
-
-        new_delta = 0
-        review_delta = 0
-
-        if card.queue == QUEUE_TYPE_NEW:
-            # came from the new queue, move to learning
-            card.queue = QUEUE_TYPE_LRN
-            card.type = CARD_TYPE_LRN
-            # init reps to graduation
-            card.left = self._startingLeft(card)
-            new_delta = +1
-
-        if card.queue in (QUEUE_TYPE_LRN, QUEUE_TYPE_DAY_LEARN_RELEARN):
-            self._answerLrnCard(card, ease)
-        elif card.queue == QUEUE_TYPE_REV:
-            self._answerRevCard(card, ease)
-            review_delta = +1
+        states = self.col._backend.get_next_card_states(card.id)
+        if ease == BUTTON_ONE:
+            new_state = states.again
+            rating = _pb.AnswerCardIn.AGAIN
+        elif ease == BUTTON_TWO:
+            new_state = states.hard
+            rating = _pb.AnswerCardIn.HARD
+        elif ease == BUTTON_THREE:
+            new_state = states.good
+            rating = _pb.AnswerCardIn.GOOD
+        elif ease == BUTTON_FOUR:
+            new_state = states.easy
+            rating = _pb.AnswerCardIn.EASY
         else:
-            raise Exception(f"Invalid queue '{card}'")
+            assert False, "invalid ease"
 
-        self.update_stats(
-            card.did,
-            new_delta=new_delta,
-            review_delta=review_delta,
-            milliseconds_delta=+card.timeTaken(),
+        self.col._backend.answer_card(
+            card_id=card.id,
+            current_state=states.current,
+            new_state=new_state,
+            rating=rating,
+            answered_at_millis=intTime(1000),
+            milliseconds_taken=card.timeTaken(),
         )
 
-        # once a card has been answered once, the original due date
-        # no longer applies
-        if card.odue:
-            card.odue = 0
+        # fixme: tests assume card will be mutated, so we need to reload it
+        card.load()
 
     def _maybe_requeue_card(self, card: Card) -> None:
         # preview cards
@@ -1053,51 +1044,59 @@ limit ?"""
 
     # Next times
     ##########################################################################
+    # fixme: move these into tests_schedv2 in the future
+
+    def _interval_for_state(self, state: _pb.SchedulingState) -> int:
+        kind = state.WhichOneof("value")
+        if kind == "normal":
+            return self._interval_for_normal_state(state.normal)
+        elif kind == "filtered":
+            return self._interval_for_filtered_state(state.filtered)
+        else:
+            assert_exhaustive(kind)
+            return 0  # unreachable
+
+    def _interval_for_normal_state(self, normal: _pb.SchedulingState.Normal) -> int:
+        kind = normal.WhichOneof("value")
+        if kind == "new":
+            return 0
+        elif kind == "review":
+            return normal.review.scheduled_days * 86400
+        elif kind == "learning":
+            return normal.learning.scheduled_secs
+        elif kind == "relearning":
+            return normal.relearning.learning.scheduled_secs
+        else:
+            assert_exhaustive(kind)
+            return 0  # unreachable
+
+    def _interval_for_filtered_state(
+        self, filtered: _pb.SchedulingState.Filtered
+    ) -> int:
+        kind = filtered.WhichOneof("value")
+        if kind == "preview":
+            return filtered.preview.scheduled_secs
+        elif kind == "rescheduling":
+            return self._interval_for_normal_state(filtered.rescheduling.original_state)
+        else:
+            assert_exhaustive(kind)
+            return 0  # unreachable
 
     def nextIvl(self, card: Card, ease: int) -> Any:
-        "Return the next interval for CARD, in seconds."
-        # preview mode?
-        if self._previewingCard(card):
+        "Don't use this - it is only required by tests, and will be moved in the future."
+        states = self.col._backend.get_next_card_states(card.id)
         if ease == BUTTON_ONE:
-                return self._previewDelay(card)
-            return 0
-
-        # (re)learning?
-        if card.queue in (QUEUE_TYPE_NEW, QUEUE_TYPE_LRN, QUEUE_TYPE_DAY_LEARN_RELEARN):
-            return self._nextLrnIvl(card, ease)
-        elif ease == BUTTON_ONE:
-            # lapse
-            conf = self._lapseConf(card)
-            if conf["delays"]:
-                return conf["delays"][0] * 60
-            return self._lapseIvl(card, conf) * 86400
-        else:
-            # review
-            early = card.odid and (card.odue > self.today)
-            if early:
-                return self._earlyReviewIvl(card, ease) * 86400
-            else:
-                return self._nextRevIvl(card, ease, fuzz=False) * 86400
-
-    # this isn't easily extracted from the learn code
-    def _nextLrnIvl(self, card: Card, ease: int) -> Any:
-        if card.queue == QUEUE_TYPE_NEW:
-            card.left = self._startingLeft(card)
-        conf = self._lrnConf(card)
-        if ease == BUTTON_ONE:
-            # fail
-            return self._delayForGrade(conf, len(conf["delays"]))
+            new_state = states.again
         elif ease == BUTTON_TWO:
-            return self._delayForRepeatingGrade(conf, card.left)
+            new_state = states.hard
+        elif ease == BUTTON_THREE:
+            new_state = states.good
         elif ease == BUTTON_FOUR:
-            return self._graduatingIvl(card, conf, True, fuzz=False) * 86400
-        else:  # ease == BUTTON_THREE
-            left = card.left % 1000 - 1
-            if left <= 0:
-                # graduate
-                return self._graduatingIvl(card, conf, False, fuzz=False) * 86400
+            new_state = states.easy
         else:
-                return self._delayForGrade(conf, left)
+            assert False, "invalid ease"
+
+        return self._interval_for_state(new_state)
 
     # Leeches
     ##########################################################################
@@ -1181,13 +1180,8 @@ and (queue={QUEUE_TYPE_NEW} or (queue={QUEUE_TYPE_REV} and due<=?))""",
 
     def nextIvlStr(self, card: Card, ease: int, short: bool = False) -> str:
         "Return the next interval for CARD as a string."
-        ivl_secs = self.nextIvl(card, ease)
-        if not ivl_secs:
-            return self.col.tr(TR.SCHEDULING_END)
-        s = self.col.format_timespan(ivl_secs, FormatTimeSpan.ANSWER_BUTTONS)
-        if ivl_secs < self.col.conf["collapseTime"]:
-            s = "<" + s
-        return s
+        states = self.col._backend.get_next_card_states(card.id)
+        return self.col._backend.describe_next_states(states)[ease - 1]
 
     # Deck list
     ##########################################################################

rslib/backend.proto

@@ -1336,6 +1336,6 @@ message AnswerCardIn {
   SchedulingState current_state = 2;
   SchedulingState new_state = 3;
   Rating rating = 4;
-  int64 answered_at = 5;
+  int64 answered_at_millis = 5;
   uint32 milliseconds_taken = 6;
 }

rslib/src/backend/sched/answering.rs

@@ -14,7 +14,7 @@ impl From<pb::AnswerCardIn> for CardAnswer {
             rating: answer.rating().into(),
             current_state: answer.current_state.unwrap_or_default().into(),
             new_state: answer.new_state.unwrap_or_default().into(),
-            answered_at: TimestampSecs(answer.answered_at),
+            answered_at: TimestampMillis(answer.answered_at_millis),
             milliseconds_taken: answer.milliseconds_taken,
         }
     }

rslib/src/sched/answering.rs

@@ -32,7 +32,7 @@ pub struct CardAnswer {
     pub current_state: CardState,
     pub new_state: CardState,
     pub rating: Rating,
-    pub answered_at: TimestampSecs,
+    pub answered_at: TimestampMillis,
     pub milliseconds_taken: u32,
 }
 
@@ -404,10 +404,11 @@ impl RevlogEntryPartial {
         usn: Usn,
         cid: CardID,
         button_chosen: u8,
+        answered_at: TimestampMillis,
         taken_millis: u32,
     ) -> RevlogEntry {
         RevlogEntry {
-            id: TimestampMillis::now(),
+            id: answered_at,
             cid,
             usn,
             button_chosen,
@@ -450,6 +451,7 @@ impl Collection {
                 usn,
                 answer.card_id,
                 button_chosen,
+                answer.answered_at,
                 answer.milliseconds_taken,
             );
             self.storage.add_revlog_entry(&revlog)?;