refactor(server)!: drop empty string to null conversion (#28808)

refactor(server): drop empty string to null conversion

server/src/controllers/person.controller.spec.ts

@@ -53,16 +53,6 @@ describe(PersonController.name, () => {
       await request(ctx.getHttpServer()).post('/people');
       expect(ctx.authenticate).toHaveBeenCalled();
     });
-
-    it('should map an empty birthDate to null', async () => {
-      await request(ctx.getHttpServer()).post('/people').send({ birthDate: '' });
-      expect(service.create).toHaveBeenCalledWith(undefined, { birthDate: null });
-    });
-
-    it('should map an empty color to null', async () => {
-      await request(ctx.getHttpServer()).post('/people').send({ color: '' });
-      expect(service.create).toHaveBeenCalledWith(undefined, { color: null });
-    });
   });
 
   describe('DELETE /people', () => {
@@ -153,12 +143,6 @@ describe(PersonController.name, () => {
       );
     });
 
-    it('should map an empty birthDate to null', async () => {
-      const id = factory.uuid();
-      await request(ctx.getHttpServer()).put(`/people/${id}`).send({ birthDate: '' });
-      expect(service.update).toHaveBeenCalledWith(undefined, id, { birthDate: null });
-    });
-
     it('should not accept an invalid birth date (false)', async () => {
       const { status, body } = await request(ctx.getHttpServer())
         .put(`/people/${factory.uuid()}`)

server/src/controllers/tag.controller.spec.ts

@@ -63,11 +63,5 @@ describe(TagController.name, () => {
       await request(ctx.getHttpServer()).put(`/tags/${factory.uuid()}`);
       expect(ctx.authenticate).toHaveBeenCalled();
     });
-
-    it('should allow setting a null color via an empty string', async () => {
-      const id = factory.uuid();
-      await request(ctx.getHttpServer()).put(`/tags/${id}`).send({ color: '' });
-      expect(service.update).toHaveBeenCalledWith(undefined, id, expect.objectContaining({ color: null }));
-    });
   });
 });

server/src/dtos/person.dto.ts

@@ -9,20 +9,22 @@ import { AssetFaceTable } from 'src/schema/tables/asset-face.table';
 import { ImageDimensions, MaybeDehydrated } from 'src/types';
 import { asBirthDateString, asDateString } from 'src/utils/date';
 import { transformFaceBoundingBox } from 'src/utils/transform';
-import { emptyStringToNull, hexColor, stringToBool } from 'src/validation';
+import { hexColor, stringToBool } from 'src/validation';
 import z from 'zod';
 
 const PersonCreateSchema = z
   .object({
     name: z.string().optional().describe('Person name'),
-    // Note: the mobile app cannot currently set the birth date to null.
-    birthDate: emptyStringToNull(z.string().meta({ format: 'date' }).nullable())
+    birthDate: z
+      .string()
+      .meta({ format: 'date' })
+      .nullable()
       .optional()
       .refine((val) => (val ? new Date(val) <= new Date() : true), { error: 'Birth date cannot be in the future' })
       .describe('Person date of birth'),
     isHidden: z.boolean().optional().describe('Person visibility (hidden)'),
     isFavorite: z.boolean().optional().describe('Mark as favorite'),
-    color: emptyStringToNull(hexColor.nullable()).optional().describe('Person color (hex)'),
+    color: hexColor.nullable().optional().describe('Person color (hex)'),
   })
   .meta({ id: 'PersonCreateDto' });
 

server/src/dtos/search.dto.ts

@@ -4,7 +4,7 @@ import { HistoryBuilder } from 'src/decorators';
 import { AlbumResponseSchema } from 'src/dtos/album.dto';
 import { AssetResponseSchema } from 'src/dtos/asset-response.dto';
 import { AssetOrder, AssetOrderSchema, AssetTypeSchema, AssetVisibilitySchema } from 'src/enum';
-import { emptyStringToNull, isoDatetimeToDate, stringToBool } from 'src/validation';
+import { isoDatetimeToDate, stringToBool } from 'src/validation';
 import z from 'zod';
 
 const BaseSearchSchema = z.object({
@@ -23,12 +23,12 @@ const BaseSearchSchema = z.object({
   trashedAfter: isoDatetimeToDate.optional().describe('Filter by trash date (after)'),
   takenBefore: isoDatetimeToDate.optional().describe('Filter by taken date (before)'),
   takenAfter: isoDatetimeToDate.optional().describe('Filter by taken date (after)'),
-  city: emptyStringToNull(z.string().nullable()).optional().describe('Filter by city name'),
-  state: emptyStringToNull(z.string().nullable()).optional().describe('Filter by state/province name'),
-  country: emptyStringToNull(z.string().nullable()).optional().describe('Filter by country name'),
-  make: emptyStringToNull(z.string().nullable()).optional().describe('Filter by camera make'),
-  model: emptyStringToNull(z.string().nullable()).optional().describe('Filter by camera model'),
-  lensModel: emptyStringToNull(z.string().nullable()).optional().describe('Filter by lens model'),
+  city: z.string().nullable().optional().describe('Filter by city name'),
+  state: z.string().nullable().optional().describe('Filter by state/province name'),
+  country: z.string().nullable().optional().describe('Filter by country name'),
+  make: z.string().nullable().optional().describe('Filter by camera make'),
+  model: z.string().nullable().optional().describe('Filter by camera model'),
+  lensModel: z.string().nullable().optional().describe('Filter by lens model'),
   isNotInAlbum: z.boolean().optional().describe('Filter assets not in any album'),
   personIds: z.array(z.uuidv4()).optional().describe('Filter by person IDs'),
   tagIds: z.array(z.uuidv4()).nullish().describe('Filter by tag IDs'),

server/src/dtos/shared-link.dto.ts

@@ -4,7 +4,7 @@ import { HistoryBuilder } from 'src/decorators';
 import { AlbumResponseSchema, mapAlbum } from 'src/dtos/album.dto';
 import { AssetResponseSchema, mapAsset } from 'src/dtos/asset-response.dto';
 import { SharedLinkTypeSchema } from 'src/enum';
-import { emptyStringToNull, isoDatetimeToDate } from 'src/validation';
+import { isoDatetimeToDate } from 'src/validation';
 import z from 'zod';
 
 const SharedLinkSearchSchema = z
@@ -23,9 +23,9 @@ const SharedLinkCreateSchema = z
     type: SharedLinkTypeSchema,
     assetIds: z.array(z.uuidv4()).optional().describe('Asset IDs (for individual assets)'),
     albumId: z.uuidv4().optional().describe('Album ID (for album sharing)'),
-    description: emptyStringToNull(z.string().nullable()).optional().describe('Link description'),
-    password: emptyStringToNull(z.string().nullable()).optional().describe('Link password'),
-    slug: emptyStringToNull(z.string().nullable()).optional().describe('Custom URL slug'),
+    description: z.string().nullable().optional().describe('Link description'),
+    password: z.string().nullable().optional().describe('Link password'),
+    slug: z.string().nullable().optional().describe('Custom URL slug'),
     expiresAt: isoDatetimeToDate.nullable().describe('Expiration date').default(null).optional(),
     allowUpload: z.boolean().optional().describe('Allow uploads'),
     allowDownload: z.boolean().default(true).optional().describe('Allow downloads'),
@@ -35,9 +35,9 @@ const SharedLinkCreateSchema = z
 
 const SharedLinkEditSchema = z
   .object({
-    description: emptyStringToNull(z.string().nullable()).optional().describe('Link description'),
-    password: emptyStringToNull(z.string().nullable()).optional().describe('Link password'),
-    slug: emptyStringToNull(z.string().nullable()).optional().describe('Custom URL slug'),
+    description: z.string().nullable().optional().describe('Link description'),
+    password: z.string().nullable().optional().describe('Link password'),
+    slug: z.string().nullable().optional().describe('Custom URL slug'),
     expiresAt: isoDatetimeToDate.nullish().describe('Expiration date'),
     allowUpload: z.boolean().optional().describe('Allow uploads'),
     allowDownload: z.boolean().optional().describe('Allow downloads'),

server/src/dtos/tag.dto.ts

@@ -2,20 +2,20 @@ import { createZodDto } from 'nestjs-zod';
 import { Tag } from 'src/database';
 import { MaybeDehydrated } from 'src/types';
 import { asDateString } from 'src/utils/date';
-import { emptyStringToNull, hexColor } from 'src/validation';
+import { hexColor } from 'src/validation';
 import z from 'zod';
 
 const TagCreateSchema = z
   .object({
     name: z.string().describe('Tag name'),
     parentId: z.uuidv4().nullish().describe('Parent tag ID'),
-    color: emptyStringToNull(hexColor.nullable()).optional().describe('Tag color (hex)'),
+    color: hexColor.nullable().optional().describe('Tag color (hex)'),
   })
   .meta({ id: 'TagCreateDto' });
 
 const TagUpdateSchema = z
   .object({
-    color: emptyStringToNull(hexColor.nullable()).optional().describe('Tag color (hex)'),
+    color: hexColor.nullable().optional().describe('Tag color (hex)'),
   })
   .meta({ id: 'TagUpdateDto' });
 

server/src/dtos/user.dto.ts

@@ -4,7 +4,7 @@ import { pinCodeRegex } from 'src/dtos/auth.dto';
 import { UserAvatarColor, UserAvatarColorSchema, UserMetadataKey, UserStatusSchema } from 'src/enum';
 import { MaybeDehydrated, UserMetadataItem } from 'src/types';
 import { asDateString } from 'src/utils/date';
-import { emptyStringToNull, isoDatetimeToDate, sanitizeFilename, stringToBool, toEmail } from 'src/validation';
+import { isoDatetimeToDate, sanitizeFilename, stringToBool, toEmail } from 'src/validation';
 import z from 'zod';
 
 export const UserUpdateMeSchema = z
@@ -80,10 +80,7 @@ export const UserAdminCreateSchema = z
     password: z.string().describe('User password'),
     name: z.string().describe('User name'),
     avatarColor: UserAvatarColorSchema.nullish(),
-    pinCode: emptyStringToNull(z.string().regex(pinCodeRegex).nullable())
-      .optional()
-      .describe('PIN code')
-      .meta({ example: '123456' }),
+    pinCode: z.string().regex(pinCodeRegex).nullable().optional().describe('PIN code').meta({ example: '123456' }),
     storageLabel: z.string().pipe(sanitizeFilename).nullish().describe('Storage label'),
     quotaSizeInBytes: z.int().min(0).nullish().describe('Storage quota in bytes'),
     shouldChangePassword: z.boolean().optional().describe('Require password change on next login'),
@@ -98,10 +95,7 @@ const UserAdminUpdateSchema = z
   .object({
     email: toEmail.optional().describe('User email'),
     password: z.string().optional().describe('User password'),
-    pinCode: emptyStringToNull(z.string().regex(pinCodeRegex).nullable())
-      .optional()
-      .describe('PIN code')
-      .meta({ example: '123456' }),
+    pinCode: z.string().regex(pinCodeRegex).nullable().optional().describe('PIN code').meta({ example: '123456' }),
     name: z.string().optional().describe('User name'),
     avatarColor: UserAvatarColorSchema.nullish(),
     storageLabel: z.string().pipe(sanitizeFilename).nullish().describe('Storage label'),

server/src/validation.ts

@@ -251,16 +251,4 @@ export const hexColor = z
   .regex(hexColorRegex)
   .transform((val) => (val.startsWith('#') ? val : `#${val}`));
 
-/**
- * Transform empty strings to null. Inner schema passed to this function must accept null.
- * @docs https://zod.dev/api?id=preprocess
- * @example emptyStringToNull(z.string().nullable()).optional() // [encouraged] final schema is optional
- * @example emptyStringToNull(z.string().nullable()) // [encouraged] same as the one above, but final schema is not optional
- * @example emptyStringToNull(z.string().nullish()) // [discouraged] same as the one above, might be confusing
- * @example emptyStringToNull(z.string().optional()) // fails: string schema rejects null
- * @example emptyStringToNull(z.string().nullable()).nullish() // [discouraged] passes, null is duplicated. use the first example instead
- */
-export const emptyStringToNull = <T extends z.ZodTypeAny>(schema: T) =>
-  z.preprocess((val) => (val === '' ? null : val), schema);
-
 export const sanitizeFilename = z.string().transform((val) => sanitize(val.replaceAll('.', '')));