fix infinite loop

src/modules/decks/decks.controller.ts

@@ -193,13 +193,20 @@ export class DecksController {
     description: 'Save the grade of a card',
     summary: 'Save the grade of a card',
   })
-  async saveGrade(@Param('id') id: string, @Req() req, @Body() body: SaveGradeDto) {
-    const saved = await this.commandBus.execute(
-      new SaveGradeCommand(req.user.id, { cardId: body.cardId, grade: body.grade })
-    )
+  async saveGrade(@Param('id') deckId: string, @Req() req, @Body() body: SaveGradeDto) {
+    const promises = [
+      this.commandBus.execute(new GetRandomCardInDeckCommand(req.user.id, deckId, body.cardId)),
+      this.commandBus.execute(
+        new SaveGradeCommand(req.user.id, { cardId: body.cardId, grade: body.grade })
+      ),
+    ]
 
-    return await this.commandBus.execute(
-      new GetRandomCardInDeckCommand(req.user.id, saved.deckId, saved.id)
-    )
+    try {
+      const [card] = await Promise.all(promises)
+
+      return card
+    } catch (error) {
+      throw error
+    }
   }
 }

src/modules/decks/use-cases/get-random-card-in-deck-use-case.ts

@@ -27,6 +27,7 @@ export class GetRandomCardInDeckHandler implements ICommandHandler<GetRandomCard
   private async getSmartRandomCard(cards: Array<CardWithGrade>): Promise<Card> {
     const selectionPool: Array<CardWithGrade> = []
 
+    console.log(cards.length)
     cards.forEach(card => {
       // Calculate the average grade for the card
       const averageGrade =
@@ -51,7 +52,7 @@ export class GetRandomCardInDeckHandler implements ICommandHandler<GetRandomCard
   ): Promise<Card> {
     const randomCard = await this.getSmartRandomCard(cards)
 
-    if (randomCard.id === previousCardId) {
+    if (randomCard.id === previousCardId && cards.length !== 1) {
       return this.getNotDuplicateRandomCard(cards, previousCardId)
     }