feat: support page reorder

Signed-off-by: Innei <tukon479@gmail.com>

src/constants/error-code.constant.ts

@@ -2,6 +2,7 @@ export enum ErrorCodeEnum {
   NoContentCanBeModified = 1000,
 
   SlugNotAvailable = 10000,
+  MaxCountLimit = 10001,
   CommentDisabled = 30000,
   CommentTooDeep = 30001,
   ServerlessError = 80000,
@@ -13,6 +14,7 @@ export enum ErrorCodeEnum {
 export const ErrorCode = Object.freeze<Record<ErrorCodeEnum, [string, number]>>(
   {
     [ErrorCodeEnum.SlugNotAvailable]: ['slug 不可用', 400],
+    [ErrorCodeEnum.MaxCountLimit]: ['已达到最大数量限制', 400],
     [ErrorCodeEnum.BanInDemo]: ['Demo 模式下此操作不可用', 400],
     [ErrorCodeEnum.MasterLost]: ['站点主人信息已丢失', 500],
     [ErrorCodeEnum.CommentDisabled]: ['全站评论已关闭', 403],

src/modules/page/page.controller.ts

@@ -19,6 +19,7 @@ import { TextMacroService } from '~/processors/helper/helper.macro.service'
 import { MongoIdDto } from '~/shared/dto/id.dto'
 import { PagerDto } from '~/shared/dto/pager.dto'
 
+import { PageReorderDto } from './page.dto'
 import { PageModel, PartialPageModel } from './page.model'
 import { PageService } from './page.service'
 
@@ -41,9 +42,7 @@ export class PageController {
         limit: size,
         page,
         select,
-        sort: sortBy
-          ? { [sortBy]: sortOrder || -1 }
-          : { order: -1, modified: -1 },
+        sort: sortBy ? { [sortBy]: sortOrder || -1 } : { order: -1 },
       },
     )
   }
@@ -105,6 +104,28 @@ export class PageController {
     return
   }
 
+  @Patch('/reorder')
+  @Auth()
+  async reorder(@Body() body: PageReorderDto) {
+    const { seq } = body
+    const orders = seq.map(($) => $.order)
+    const uniq = new Set(orders)
+    if (uniq.size !== orders.length) {
+      throw new UnprocessableEntityException('order must be unique')
+    }
+    const tasks = seq.map(({ id, order }) => {
+      return this.pageService.model.updateOne(
+        {
+          _id: id,
+        },
+        {
+          order,
+        },
+      )
+    })
+    await Promise.all(tasks)
+  }
+
   @Delete('/:id')
   @Auth()
   async deletePage(@Param() params: MongoIdDto) {

src/modules/page/page.dto.ts

@@ -0,0 +1,15 @@
+import { Type } from 'class-transformer'
+import { IsInt, IsMongoId, Min, ValidateNested } from 'class-validator'
+
+class Seq {
+  @IsMongoId()
+  id: string
+  @IsInt()
+  @Min(1)
+  order: number
+}
+export class PageReorderDto {
+  @Type(() => Seq)
+  @ValidateNested()
+  seq: Seq[]
+}

src/modules/page/page.service.ts

@@ -4,8 +4,10 @@ import slugify from 'slugify'
 
 import { Injectable } from '@nestjs/common'
 
+import { BizException } from '~/common/exceptions/biz.exception'
 import { NoContentCanBeModifiedException } from '~/common/exceptions/no-content-canbe-modified.exception'
 import { BusinessEvents, EventScope } from '~/constants/business-event.constant'
+import { ErrorCodeEnum } from '~/constants/error-code.constant'
 import { EventManagerService } from '~/processors/helper/helper.event.service'
 import { ImageService } from '~/processors/helper/helper.image.service'
 import { TextMacroService } from '~/processors/helper/helper.macro.service'
@@ -29,6 +31,14 @@ export class PageService {
   }
 
   public async create(doc: PageModel) {
+    const count = await this.model.countDocuments({})
+    if (count >= 10) {
+      throw new BizException(ErrorCodeEnum.MaxCountLimit)
+    }
+    // `0` or `undefined` or `null`
+    if (!doc.order) {
+      doc.order = count + 1
+    }
     const res = await this.model.create({
       ...doc,
       slug: slugify(doc.slug),