[questions][feat] add encounters sorting (#458)

Co-authored-by: Bryann Yeap Kok Keong <bryannyeapkk@gmail.com>
Co-authored-by: Ai Ling <hong-ailing@hotmail.com>
Co-authored-by: Zhang Ziqing <zhangziqing9926@gmail.com>
Co-authored-by: Bryann Yeap Kok Keong <77266823+BryannYeap@users.noreply.github.com>

apps/portal/prisma/migrations/20221029180052_add_ecnounter_sort_support/migration.sql

@@ -0,0 +1,5 @@
+-- AlterTable
+ALTER TABLE "QuestionsQuestion" ADD COLUMN     "numEncounters" INTEGER NOT NULL DEFAULT 0;
+
+-- CreateIndex
+CREATE INDEX "QuestionsQuestion_numEncounters_id_idx" ON "QuestionsQuestion"("numEncounters", "id");

apps/portal/prisma/schema.prisma

@@ -444,6 +444,7 @@ model QuestionsQuestion {
   questionType  QuestionsQuestionType
   lastSeenAt    DateTime?
   upvotes       Int                   @default(0)
+  numEncounters Int                   @default(0)
   createdAt     DateTime              @default(now())
   updatedAt     DateTime              @updatedAt
 
@@ -455,6 +456,7 @@ model QuestionsQuestion {
   questionsListQuestionEntries QuestionsListQuestionEntry[]
 
   @@index([lastSeenAt, id])
+  @@index([numEncounters, id])
   @@index([upvotes, id])
 }
 

apps/portal/src/server/router/questions/questions-question-encounter-user-router.ts

@@ -41,19 +41,21 @@ export const questionsQuestionEncounterUserRouter = createProtectedRouter()
           });
         }
 
-        if (
+
-          questionToUpdate.lastSeenAt === null ||
-          questionToUpdate.lastSeenAt < input.seenAt
-        ) {
         await tx.questionsQuestion.update({
           data: {
-              lastSeenAt: input.seenAt,
+            lastSeenAt: (questionToUpdate.lastSeenAt === null ||
+                          questionToUpdate.lastSeenAt < input.seenAt)
+                            ? input.seenAt : undefined,
+            numEncounters: {
+              increment: 1,
+            },
           },
           where: {
             id: input.questionId,
           },
         });
-        }
+
         return questionEncounterCreated;
       });
     },
@@ -160,6 +162,8 @@ export const questionsQuestionEncounterUserRouter = createProtectedRouter()
           }),
         ]);
 
+        let lastSeenVal = undefined;
+
         if (questionToUpdate!.lastSeenAt === questionEncounterToDelete.seenAt) {
           const latestEncounter =
             await ctx.prisma.questionsQuestionEncounter.findFirst({
@@ -171,17 +175,20 @@ export const questionsQuestionEncounterUserRouter = createProtectedRouter()
               },
             });
 
-          const lastSeenVal = latestEncounter ? latestEncounter!.seenAt : null;
+          lastSeenVal = latestEncounter ? latestEncounter!.seenAt : null;
+        }
 
         await tx.questionsQuestion.update({
             data: {
               lastSeenAt: lastSeenVal,
+              numEncounters: {
+                increment: -1,
+              },
             },
             where: {
               id: questionToUpdate!.id,
             },
           });
-        }
 
         return questionEncounterDeleted;
       });

apps/portal/src/server/router/questions/questions-question-router.ts

@@ -27,9 +27,11 @@ export const questionsQuestionRouter = createRouter()
     async resolve({ ctx, input }) {
       const { cursor } = input;
 
-      const sortCondition =
+      let sortCondition = undefined;
-        input.sortType === SortType.TOP
+
-          ? [
+      switch (input.sortType) {
+        case SortType.TOP:
+          sortCondition = [
             {
               upvotes: input.sortOrder,
             },
@@ -37,7 +39,9 @@ export const questionsQuestionRouter = createRouter()
               id: input.sortOrder,
             },
           ]
-          : [
+          break;
+        case SortType.NEW:
+          sortCondition = [
             {
               lastSeenAt: input.sortOrder,
             },
@@ -45,6 +49,18 @@ export const questionsQuestionRouter = createRouter()
               id: input.sortOrder,
             },
           ];
+          break;
+        case SortType.ENCOUNTERS:
+          sortCondition = [
+            {
+              numEncounters: input.sortOrder,
+            },
+            {
+              id: input.sortOrder,
+            },
+          ];
+          break;
+        }
 
       const questionsData = await ctx.prisma.questionsQuestion.findMany({
         cursor: cursor ? { id: cursor } : undefined,

apps/portal/src/types/questions.d.ts

@@ -88,4 +88,5 @@ export enum SortOrder {
 export enum SortType {
   TOP,
   NEW,
+  ENCOUNTERS,
 }