feat: random memories sort order (#20025)

server/src/dtos/memory.dto.ts

@@ -4,7 +4,7 @@ import { IsInt, IsObject, IsPositive, ValidateNested } from 'class-validator';
 import { Memory } from 'src/database';
 import { AssetResponseDto, mapAsset } from 'src/dtos/asset-response.dto';
 import { AuthDto } from 'src/dtos/auth.dto';
-import { MemoryType } from 'src/enum';
+import { AssetOrderWithRandom, MemoryType } from 'src/enum';
 import { ValidateBoolean, ValidateDate, ValidateEnum, ValidateUUID } from 'src/validation';
 
 class MemoryBaseDto {
@@ -27,6 +27,15 @@ export class MemorySearchDto {
 
   @ValidateBoolean({ optional: true })
   isSaved?: boolean;
+
+  @IsInt()
+  @IsPositive()
+  @Type(() => Number)
+  @ApiProperty({ type: 'integer', description: 'Number of memories to return' })
+  size?: number;
+
+  @ValidateEnum({ enum: AssetOrderWithRandom, name: 'MemorySearchOrder', optional: true })
+  order?: AssetOrderWithRandom;
 }
 
 class OnThisDayDto {

server/src/enum.ts

@@ -71,6 +71,14 @@ export enum MemoryType {
   OnThisDay = 'on_this_day',
 }
 
+export enum AssetOrderWithRandom {
+  // Include existing values
+  Asc = AssetOrder.Asc,
+  Desc = AssetOrder.Desc,
+  /** Randomly Ordered */
+  Random = 'random',
+}
+
 export enum Permission {
   All = 'all',
 

server/src/repositories/memory.repository.ts

@@ -1,11 +1,11 @@
 import { Injectable } from '@nestjs/common';
-import { Insertable, Kysely, sql, Updateable } from 'kysely';
+import { Insertable, Kysely, OrderByDirection, sql, Updateable } from 'kysely';
 import { jsonArrayFrom } from 'kysely/helpers/postgres';
 import { DateTime } from 'luxon';
 import { InjectKysely } from 'nestjs-kysely';
 import { Chunked, ChunkedSet, DummyValue, GenerateSql } from 'src/decorators';
 import { MemorySearchDto } from 'src/dtos/memory.dto';
-import { AssetVisibility } from 'src/enum';
+import { AssetOrderWithRandom, AssetVisibility } from 'src/enum';
 import { DB } from 'src/schema';
 import { MemoryTable } from 'src/schema/tables/memory.table';
 import { IBulkAsset } from 'src/types';
@@ -72,7 +72,12 @@ export class MemoryRepository implements IBulkAsset {
         ).as('assets'),
       )
       .selectAll('memory')
-      .orderBy('memoryAt', 'desc')
+      .$call((qb) =>
+        dto.order === AssetOrderWithRandom.Random
+          ? qb.orderBy(sql`RANDOM()`)
+          : qb.orderBy('memoryAt', (dto.order?.toLowerCase() || 'desc') as OrderByDirection),
+      )
+      .$if(dto.size !== undefined, (qb) => qb.limit(dto.size!))
       .execute();
   }