to sm2 Next

testdata/sample.yaml

@@ -25,10 +25,3 @@ users:
       uuid1:
       - {a: uuid0, pass: true}
       - {a: uuid2, pass: true}
-cadence:
-- 1d
-- 3d
-- 1w
-- 3w
-- 1m
-- 3m

testdata/tofugu.yaml

@@ -12,12 +12,3 @@ users:
       - hiragana
       - katakana
     history: {}
-cadence:
-- 1h
-- 3h
-- 1d
-- 3d
-- 1w
-- 3w
-- 1m
-- 3m

yamldb.go

@@ -13,7 +13,6 @@ type (
 		addr      string
 		Knowledge knowledge
 		Users     map[IDU]user
-		Cadence   []duration
 	}
 	knowledge struct {
 		Questions map[IDQ]Question
@@ -36,7 +35,6 @@ func newYamlDB(p string) (yamlDB, error) {
 			Answers:   map[IDA]Answer{},
 		},
 		Users: map[IDU]user{},
-		Cadence: []duration{},
 	}
 	if b, err := os.ReadFile(p); err != nil {
 		return yamlDB{}, err
@@ -79,20 +77,16 @@ func (db yamlDB) HistoryOf(user IDU) map[IDQ][]History {
 
 func (db yamlDB) Next(user IDU, q IDQ) time.Time {
 	history := db.Users[user].History[q]
-	progress := 0
+	last := db.lastTS(user, q)
+	log := make([]int, 0, len(history))
 	for i := range history {
+		v := 0
 		if history[i].Pass {
-			progress += 1
+			v = 5
-		} else {
-			progress -= 1
 		}
+		log = append(log, v)
 	}
-	if progress < 0 {
+	return Next(last, log)
-		progress = 0
-	} else if progress > len(db.Cadence) {
-		return time.Now().Add(time.Hour * 24 * 365 * 10)
-	}
-	return db.lastTS(user, q).Add(time.Duration(db.Cadence[progress]))
 }
 
 func (db yamlDB) Question(q IDQ) Question {