Fix/forget (#50)

* Fix/wrong scheduled_days in forget

* 3.1.0-beta8

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ts-fsrs",
-  "version": "3.1.0-beta7",
+  "version": "3.1.0-beta8",
   "description": "ts-fsrs is a TypeScript package used to implement the Free Spaced Repetition Scheduler (FSRS) algorithm. It helps developers apply FSRS to their flashcard applications, thereby improving the user learning experience.",
   "main": "dist/ts-fsrs.js",
   "module": "dist/ts-fsrs.mjs",

src/fsrs/default.ts

@@ -9,7 +9,7 @@ export const default_w = [
 ];
 export const default_enable_fuzz = false;
 
-export const FSRSVersion: string = "3.1.0-beta7";
+export const FSRSVersion: string = "3.1.0-beta8";
 
 export const generatorParameters = (
   props?: Partial<FSRSParameters>,

src/fsrs/fsrs.ts

@@ -146,6 +146,8 @@ export class FSRS extends FSRSAlgorithm {
   ): RecordLogItem => {
     card = this.preProcessCard(card);
     now = this.preProcessDate(now);
+    const scheduled_days =
+      card.state === State.New ? 0 : now.diff(card.last_review as Date, "days");
     const forget_log: ReviewLog = {
       rating: Rating.Manual,
       state: card.state,
@@ -154,7 +156,7 @@ export class FSRS extends FSRSAlgorithm {
       difficulty: card.difficulty,
       elapsed_days: 0,
       last_elapsed_days: card.elapsed_days,
-      scheduled_days: card.scheduled_days,
+      scheduled_days: scheduled_days,
       review: now,
     };
     const forget_card: Card = {