From 388ab50718f8c7570a0fcdd30a6a9b931915794d Mon Sep 17 00:00:00 2001
From: liuyi <liuyiinhhu@gmail.com>
Date: Wed, 21 May 2025 16:14:36 +0800
Subject: [PATCH] add service

---
 .../content/services/category.service.ts      | 89 +++++++++++++++++++
 src/modules/content/services/tag.service.ts   | 35 ++++++++
 2 files changed, 124 insertions(+)
 create mode 100644 src/modules/content/services/category.service.ts
 create mode 100644 src/modules/content/services/tag.service.ts

diff --git a/src/modules/content/services/category.service.ts b/src/modules/content/services/category.service.ts
new file mode 100644
index 0000000..6ea741c
--- /dev/null
+++ b/src/modules/content/services/category.service.ts
@@ -0,0 +1,89 @@
+import { Injectable } from '@nestjs/common';
+import { isNil, omit } from 'lodash';
+import { EntityNotFoundError } from 'typeorm';
+
+import { CreateCategoryDto, QueryCategoryDto } from '@/modules/content/dtos/category.dto';
+import { CategoryEntity } from '@/modules/content/entities/CategoryEntity';
+import { CategoryRepository } from '@/modules/content/repositories/category.repository';
+import { treePaginate } from '@/modules/database/utils';
+
+@Injectable()
+export class CategoryService {
+    constructor(protected repository: CategoryRepository) {}
+
+    async findTrees() {
+        return this.repository.findTrees();
+    }
+
+    async paginate(options?: QueryCategoryDto) {
+        const tree = await this.findTrees();
+        const data = await this.repository.toFlatTrees(tree);
+        return treePaginate(options, data);
+    }
+
+    async detail(id: string) {
+        return this.repository.findOneByOrFail({ where: { id }, relations: ['parent'] });
+    }
+
+    async create(data: CreateCategoryDto) {
+        const item = await this.repository.save({
+            ...data,
+            parent: await this.getParent(undefined, data.parent),
+        });
+        return this.detail(item.id);
+    }
+
+    async update(data: UpdateCategoryDto) {
+        await this.repository.update(data.id, omit(data, ['id', 'parent']));
+        const item = await this.repository.findOneByOrFail({
+            where: { id: data.id },
+            relations: ['parent'],
+        });
+        const parent = await this.getParent(item.parent?.id, data.parent);
+        const shouldUpdateParent =
+            (!isNil(item.parent) && !isNil(parent) && item.parent.id !== parent.id) ||
+            (!isNil(item.parent) && !isNil(parent)) ||
+            (!isNil(item.parent) && isNil(parent));
+
+        if (shouldUpdateParent && parent !== undefined) {
+            item.parent = parent;
+            await this.repository.save(item, { reload: true });
+        }
+        return item;
+    }
+
+    async delete(id: string) {
+        const item = await this.repository.findOneByOrFail({
+            where: { id },
+            relations: ['parent', 'children'],
+        });
+        if (!isNil(item.children) && item.children.length > 0) {
+            const childrenCategories = [...item.children].map((c) => {
+                c.parent = item.parent;
+                return item;
+            });
+            await this.repository.save(childrenCategories, { reload: true });
+        }
+        return this.repository.remove(item);
+    }
+
+    async getParent(current?: string, parentId?: string) {
+        if (current === parentId) {
+            return undefined;
+        }
+        let parent: CategoryEntity | undefined;
+        if (parentId !== undefined) {
+            if (parentId === null) {
+                return null;
+            }
+            parent = await this.repository.findOne({ where: { id: parentId } });
+            if (!parent) {
+                throw new EntityNotFoundError(
+                    CategoryEntity,
+                    `Parent category with id ${parentId} not exists!`,
+                );
+            }
+        }
+        return parent;
+    }
+}
diff --git a/src/modules/content/services/tag.service.ts b/src/modules/content/services/tag.service.ts
new file mode 100644
index 0000000..97458d8
--- /dev/null
+++ b/src/modules/content/services/tag.service.ts
@@ -0,0 +1,35 @@
+import { omit } from 'lodash';
+
+import { CreateTagDto, QueryTagDto } from '@/modules/content/dtos/tag.dto';
+import { TagRepository } from '@/modules/content/repositories/tag.repository';
+import { paginate } from '@/modules/database/utils';
+
+export class TagService {
+    constructor(protected repository: TagRepository) {}
+
+    async paginate(options: QueryTagDto) {
+        const qb = this.repository.buildBaseQB();
+        return paginate(qb, options);
+    }
+
+    async detail(id: string) {
+        const qb = this.repository.buildBaseQB();
+        qb.where(`tag.id = :id`, { id });
+        return qb.getOneOrFail();
+    }
+
+    async create(data: CreateTagDto) {
+        const item = await this.repository.save(data);
+        return this.detail(item.id);
+    }
+
+    async update(data: UpdateTagDto) {
+        await this.repository.update(data.id, omit(data, ['id']));
+        return this.detail(data.id);
+    }
+
+    async delete(id: string) {
+        const item = this.repository.findOneByOrFail({ id });
+        return this.repository.remove(item);
+    }
+}