Deduplicate seed data and add tests

src/db/seed.test.ts

@@ -0,0 +1,121 @@
+import { randomUUID } from 'crypto';
+import { describe, expect, it } from 'vitest';
+import { seedAreas, seedCategories, seedDatabase, seedProducts } from './seed';
+import { Area } from '../models/Area';
+import { Category } from '../models/Category';
+import { DEFAULT_BULK_NAME, DEFAULT_UNIT_TYPE, Product } from '../models/Product';
+import { StockFillDB } from './index';
+
+const normalizeName = (name: string) => name.trim().toLowerCase();
+
+class MockTable<T extends { id: string; name: string }> {
+  constructor(public items: T[] = []) {}
+
+  async count() {
+    return this.items.length;
+  }
+
+  async bulkAdd(records: T[]) {
+    this.items.push(...records);
+  }
+
+  async bulkDelete(ids: string[]) {
+    this.items = this.items.filter((item) => !ids.includes(item.id));
+  }
+
+  async toArray() {
+    return [...this.items];
+  }
+}
+
+const buildArea = (overrides: Partial<Area> = {}): Area => ({
+  id: overrides.id ?? randomUUID(),
+  name: overrides.name ?? 'Area',
+  created_at: overrides.created_at ?? Date.now(),
+  updated_at: overrides.updated_at ?? Date.now(),
+});
+
+const buildProduct = (overrides: Partial<Product> = {}): Product => ({
+  id: overrides.id ?? randomUUID(),
+  name: overrides.name ?? 'Product',
+  category: overrides.category ?? 'Category',
+  unit_type: overrides.unit_type ?? DEFAULT_UNIT_TYPE,
+  bulk_name: overrides.bulk_name ?? DEFAULT_BULK_NAME,
+  barcode: overrides.barcode,
+  archived: overrides.archived ?? false,
+  created_at: overrides.created_at ?? Date.now(),
+  updated_at: overrides.updated_at ?? Date.now(),
+});
+
+const buildCategory = (overrides: Partial<Category> = {}): Category => ({
+  id: overrides.id ?? randomUUID(),
+  name: overrides.name ?? 'Category',
+  created_at: overrides.created_at ?? Date.now(),
+  updated_at: overrides.updated_at ?? Date.now(),
+});
+
+const createMockDb = (options: {
+  areas?: Area[];
+  products?: Product[];
+  categories?: Category[];
+} = {}) => {
+  const db = {
+    areas: new MockTable<Area>(options.areas ?? []),
+    products: new MockTable<Product>(options.products ?? []),
+    categories: new MockTable<Category>(options.categories ?? []),
+    pickLists: new MockTable<any>(),
+    pickItems: new MockTable<any>(),
+  } as unknown as StockFillDB;
+
+  return db;
+};
+
+describe('seedDatabase', () => {
+  it('deduplicates seeded areas, categories, and products', async () => {
+    const duplicateSeedArea = buildArea({ name: seedAreas[0] });
+    const trailingSpaceArea = buildArea({ name: `${seedAreas[0]} ` });
+    const customArea = buildArea({ name: 'Produce' });
+
+    const duplicateProduct = buildProduct({ name: seedProducts[0].name, category: seedProducts[0].category });
+    const duplicateProductWithWhitespace = buildProduct({ name: `${seedProducts[0].name} `, category: seedProducts[0].category });
+    const customProduct = buildProduct({ name: 'Custom Item', category: 'Specials' });
+
+    const duplicateCategory = buildCategory({ name: seedCategories[0] });
+    const trailingSpaceCategory = buildCategory({ name: `${seedCategories[0]} ` });
+
+    const db = createMockDb({
+      areas: [duplicateSeedArea, trailingSpaceArea, customArea],
+      products: [duplicateProduct, duplicateProductWithWhitespace, customProduct],
+      categories: [duplicateCategory, trailingSpaceCategory],
+    });
+
+    await seedDatabase(db);
+
+    const areas = await db.areas.toArray();
+    const areaNames = areas.map((area) => normalizeName(area.name));
+    const seededAreaNames = new Set(seedAreas.map(normalizeName));
+
+    expect(areaNames.filter((name) => name === normalizeName(seedAreas[0]))).toHaveLength(1);
+    expect(new Set(areaNames.filter((name) => seededAreaNames.has(name)))).toEqual(seededAreaNames);
+    expect(areaNames).toContain(normalizeName(customArea.name));
+
+    const products = await db.products.toArray();
+    const seededProductNames = new Set(seedProducts.map((product) => normalizeName(product.name)));
+    const productNamesInDb = products.map((product) => normalizeName(product.name));
+
+    expect(productNamesInDb.filter((name) => name === normalizeName(seedProducts[0].name))).toHaveLength(1);
+    expect(new Set(productNamesInDb.filter((name) => seededProductNames.has(name)))).toEqual(
+      seededProductNames,
+    );
+    expect(productNamesInDb).toContain(normalizeName(customProduct.name));
+
+    const categories = await db.categories.toArray();
+    const seededCategoryNames = new Set(seedCategories.map(normalizeName));
+    const categoryNamesInDb = categories.map((category) => normalizeName(category.name));
+
+    expect(categoryNamesInDb.filter((name) => name === normalizeName(seedCategories[0]))).toHaveLength(1);
+    expect(new Set(categoryNamesInDb.filter((name) => seededCategoryNames.has(name)))).toEqual(
+      seededCategoryNames,
+    );
+  });
+});

src/db/seed.ts

@@ -1,10 +1,13 @@
+import { Table } from 'dexie';
 import { v4 as uuidv4 } from 'uuid';
 import { StockFillDB } from './index';
 import { DEFAULT_BULK_NAME, DEFAULT_UNIT_TYPE } from '../models/Product';
 
 const now = () => Date.now();
 
-const seedProducts = [
+export const seedAreas = ['Drinks', 'Snacks', 'Dairy'];
+
+export const seedProducts = [
   { name: 'Nutrient Water Endurance', category: 'Drinks' },
   { name: 'Nutrient Water Focus', category: 'Drinks' },
   { name: 'Cocobella Choc', category: 'Drinks' },
@@ -33,10 +36,39 @@ const seedProducts = [
   { name: 'Mars Bar', category: 'Chocolates' },
 ];
 
-const seedCategories = Array.from(
+export const seedCategories = Array.from(
   new Set(seedProducts.map(({ category }) => category)),
 ).sort();
 
+const normalizeName = (name: string) => name.trim().toLowerCase();
+
+const dedupeSeedRecords = async <T extends { id: string; name: string }>(
+  table: Table<T>,
+  seededNames: Set<string>,
+) => {
+  const existing = await table.toArray();
+  const seen = new Set<string>();
+  const duplicateIds: string[] = [];
+
+  existing.forEach((record) => {
+    const normalized = normalizeName(record.name);
+    if (!seededNames.has(normalized)) return;
+
+    if (seen.has(normalized)) {
+      duplicateIds.push(record.id);
+      return;
+    }
+
+    seen.add(normalized);
+  });
+
+  if (duplicateIds.length > 0) {
+    await table.bulkDelete(duplicateIds);
+  }
+
+  return seen;
+};
+
 const buildProductRecord = (product: { name: string; category: string }) => ({
   id: uuidv4(),
   name: product.name,
@@ -49,19 +81,30 @@ const buildProductRecord = (product: { name: string; category: string }) => ({
 });
 
 export const seedDatabase = async (db: StockFillDB) => {
-  const areaCount = await db.areas.count();
+  const seededAreaNames = new Set(seedAreas.map(normalizeName));
-  if (areaCount === 0) {
+  const existingSeedAreas = await dedupeSeedRecords(db.areas, seededAreaNames);
-    await db.areas.bulkAdd([
+  const missingAreas = seedAreas.filter((area) => !existingSeedAreas.has(normalizeName(area)));
-      { id: uuidv4(), name: 'Drinks', created_at: now(), updated_at: now() },
+
-      { id: uuidv4(), name: 'Snacks', created_at: now(), updated_at: now() },
+  if (missingAreas.length > 0) {
-      { id: uuidv4(), name: 'Dairy', created_at: now(), updated_at: now() },
+    await db.areas.bulkAdd(
-    ]);
+      missingAreas.map((name) => ({
+        id: uuidv4(),
+        name,
+        created_at: now(),
+        updated_at: now(),
+      })),
+    );
   }
 
-  const categoryCount = await db.categories.count();
+  const seededCategoryNames = new Set(seedCategories.map(normalizeName));
-  if (categoryCount === 0) {
+  const existingSeedCategories = await dedupeSeedRecords(db.categories, seededCategoryNames);
+  const missingCategories = seedCategories.filter(
+    (category) => !existingSeedCategories.has(normalizeName(category)),
+  );
+
+  if (missingCategories.length > 0) {
     await db.categories.bulkAdd(
-      seedCategories.map((category) => ({
+      missingCategories.map((category) => ({
         id: uuidv4(),
         name: category,
         created_at: now(),
@@ -70,8 +113,13 @@ export const seedDatabase = async (db: StockFillDB) => {
     );
   }
 
-  const productCount = await db.products.count();
+  const seededProductNames = new Set(seedProducts.map(({ name }) => normalizeName(name)));
-  if (productCount === 0) {
+  const existingSeedProducts = await dedupeSeedRecords(db.products, seededProductNames);
-    await db.products.bulkAdd(seedProducts.map(buildProductRecord));
+  const missingProducts = seedProducts.filter(
+    (product) => !existingSeedProducts.has(normalizeName(product.name)),
+  );
+
+  if (missingProducts.length > 0) {
+    await db.products.bulkAdd(missingProducts.map(buildProductRecord));
   }
 };