getting items by EAN-13

src/items/ean/ean.service.ts

@@ -21,6 +21,10 @@ export class EANService {
   }
 
   toID(ean: string) {
+    if (ean.length === 12) {
+      // it already is an ID
+      return ean;
+    }
     if (!this.isValid(ean)) {
       throw new Error(`Invalid EAN: "${ean}"`);
     }

src/items/items.model.ts

@@ -4,7 +4,7 @@ import { Field, ID, ObjectType } from '@nestjs/graphql';
   description: 'Either the inventored thing or a box containing them',
 })
 export class ItemModel {
-  @Field((type) => ID)
+  @Field((type) => ID, { description: 'Database ID or EAN-13 code' })
   id: string;
 
   @Field()

src/items/items.service.ts

@@ -2,6 +2,7 @@ import { Injectable } from '@nestjs/common';
 import { InjectEntityManager, InjectRepository } from '@nestjs/typeorm';
 import { EntityManager, Repository, TreeRepository } from 'typeorm';
 import { NewItemInput } from './dto/new-item.input';
+import { EANService } from './ean/ean.service';
 import { Item } from './items.entity';
 import { ItemModel } from './items.model';
 
@@ -12,26 +13,33 @@ export class ItemsService {
     private itemRepository: Repository<Item>,
     @InjectEntityManager()
     private entityManager: EntityManager,
+    private eans: EANService,
   ) {
     this.treeRepository = this.entityManager.getTreeRepository(Item);
   }
   treeRepository: TreeRepository<Item>;
 
   async getItem(id: string): Promise<Item | undefined> {
-    return this.itemRepository.findOne(id);
+    return this.itemRepository.findOne(this.eans.toID(id));
   }
 
   async getItemParent(item: ItemModel): Promise<Item | undefined> {
-    const childItem = await this.itemRepository.findOneOrFail(item.id, {
+    const childItem = await this.itemRepository.findOneOrFail(
-      relations: ['parent'],
+      this.eans.toID(item.id),
-    });
+      {
+        relations: ['parent'],
+      },
+    );
     return childItem.parent;
   }
 
   async getItemAncestors(item: ItemModel): Promise<Item[]> {
-    const childItem = await this.itemRepository.findOneOrFail(item.id, {
+    const childItem = await this.itemRepository.findOneOrFail(
-      relations: ['parent'],
+      this.eans.toID(item.id),
-    });
+      {
+        relations: ['parent'],
+      },
+    );
     // TreeRepository.findAncestors()[0] is always the child item
     return (await this.treeRepository.findAncestors(childItem)).slice(1);
   }
@@ -39,15 +47,18 @@ export class ItemsService {
   async getItemChildren(item: ItemModel): Promise<Item[]> {
     return this.itemRepository.find({
       where: {
-        parent: item.id,
+        parent: this.eans.toID(item.id),
       },
     });
   }
 
   async getItemDescendants(item: ItemModel): Promise<Item[]> {
-    const parentItem = await this.itemRepository.findOneOrFail(item.id, {
+    const parentItem = await this.itemRepository.findOneOrFail(
-      relations: ['parent'],
+      this.eans.toID(item.id),
-    });
+      {
+        relations: ['parent'],
+      },
+    );
     // TreeRepository.findDescendants()[0] is always the parent item
     return (await this.treeRepository.findDescendants(parentItem)).slice(1);
   }
@@ -55,7 +66,10 @@ export class ItemsService {
   async createItem(input: NewItemInput): Promise<Item> {
     // must use Repository.save() for the closure table to work,
     // so we have to check whether the provided ID exists in the first place
-    if (input.id && (await this.itemRepository.count({ id: input.id })) !== 0) {
+    if (
+      input.id &&
+      (await this.itemRepository.count({ id: this.eans.toID(input.id) })) !== 0
+    ) {
       throw new Error('Item with this ID already exists');
     }
 
@@ -72,7 +86,10 @@ export class ItemsService {
     const item = this.itemRepository.create({
       ...input,
       // if id not provided, use the highest one in db +1
-      id: highestId ? (BigInt(highestId) + 1n).toString(10) : input.id,
+      id: highestId
+        ? (BigInt(highestId) + 1n).toString(10)
+        : // @ts-ignore input.id must exist here
+          this.eans.toID(input.id),
       parent: input.parent
         ? await this.itemRepository.findOneOrFail(input.parent)
         : undefined,