Implemented 'cards_recent_ease' to pull a list of the most recent answers to a list of cards.

AnkiServer/apps/rest_app.py

@@ -485,6 +485,23 @@ class CollectionHandler(RestHandlerBase):
         card_ids = req.data['ids']
         col.sched.unsuspendCards(card_ids)
 
+    def cards_recent_ease(self, col, req):
+        """Returns the most recent ease for each card."""
+
+        # TODO: Use sqlalchemy to build this query!
+        sql = "SELECT r.cid, r.ease, r.id FROM revlog AS r INNER JOIN (SELECT cid, MAX(id) AS id FROM revlog GROUP BY cid) AS q ON r.cid = q.cid AND r.id = q.id"
+        where = []
+        if req.data.has_key('ids'):
+            where.append('ids IN (' + (','.join(["'%s'" % x for x in req.data['ids']])) + ')')
+        if len(where) > 0:
+            sql += ' WHERE ' + ' AND '.join(where)
+
+        result = []
+        for r in col.db.all(sql):
+            result.append({'id': r[0], 'ease': r[1], 'timestamp': int(r[2] / 1000)})
+
+        return result
+
     stats_reports = {
       'today': 'todayStats',
       'due': 'dueGraph',

tests/test_rest_app.py

@@ -408,6 +408,24 @@ class CollectionHandlerTest(CollectionTestBase):
         card = self.collection.sched.getCard()
         self.assertEqual(card.id, card_id)
 
+    def test_cards_recent_ease(self):
+        self.add_default_note()
+        card_id = self.collection.findCards('')[0]
+
+        # answer the card
+        self.collection.reset()
+        card = self.collection.sched.getCard()
+        card.startTimer()
+        # answer multiple times to see that we only get the latest!
+        self.collection.sched.answerCard(card, 1)
+        self.collection.sched.answerCard(card, 3)
+        self.collection.sched.answerCard(card, 2)
+
+        # pull the latest revision
+        ret = self.execute('cards_recent_ease', {})
+        self.assertEqual(ret[0]['id'], card_id)
+        self.assertEqual(ret[0]['ease'], 2)
+
 class ImportExportHandlerTest(CollectionTestBase):
     export_rows = [
         ['Card front 1', 'Card back 1', 'Tag1 Tag2'],