From c2c9f948c9fd52de66eef1358c9cf8686c7b8b10 Mon Sep 17 00:00:00 2001 From: Andres Alvarez Date: Sun, 27 Apr 2025 00:51:20 -0400 Subject: [PATCH 1/7] Create recommendation module and data file to train model --- src/recommendation/data.ts | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 src/recommendation/data.ts diff --git a/src/recommendation/data.ts b/src/recommendation/data.ts new file mode 100644 index 0000000..f56ffbc --- /dev/null +++ b/src/recommendation/data.ts @@ -0,0 +1,26 @@ +import * as tf from '@tensorflow/tfjs'; + +export const PRODUCT_MAPPING = { + 0: 'Advil Pain Reliever', + 1: 'Amlodipina', + 2: 'Amoxicilina', + 3: 'Aspirina', + 4: 'Atenolol', + 5: 'citrato de potasio', + 6: 'Dayzol', + 7: 'Izaban', + 8: 'Meloxicam', + 9: 'Miovit', + 10: 'Vitamina C', + 11: 'Zithromax', +}; + +export const RECOMMENDATION_DATA = [ + tf.tensor([12.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 2.0, 4.0]), + tf.tensor([20.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 3.0, 11.0]), + tf.tensor([42.0, 4.0, 1.0, 11.0, 0.0, 4.0, 15.0, 4.0, 0.0, 2.0, 32.0, 29.0]), + tf.tensor([15.0, 0.0, 0.0, 11.0, 2.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 5.0]), + tf.tensor([29.0, 0.0, 0.0, 2.0, 0.0, 0.0, 0.0, 0.0, 0.0, 4.0, 9.0, 28.0]), + tf.tensor([2.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 3.0, 0.0]), + tf.tensor([2.0, 0.0, 0.0, 0.0, 0.0, 1.0, 2.0, 3.0, 2.0, 3.0, 0.0, 1.0]), +]; From 737d1bdcac57622001e90619b4e9bffcbe7e0d3e Mon Sep 17 00:00:00 2001 From: Andres Alvarez Date: Sun, 27 Apr 2025 00:52:46 -0400 Subject: [PATCH 2/7] Install tensorflow --- package-lock.json | 887 +++++++++++++++++++++++++++++++++++++++++++++- package.json | 1 + 2 files changed, 870 insertions(+), 18 deletions(-) diff --git a/package-lock.json b/package-lock.json index dde1e30..48457ce 100644 --- a/package-lock.json +++ b/package-lock.json @@ -17,6 +17,7 @@ "@nestjs/platform-express": "^11.0.1", "@nestjs/swagger": "^11.0.6", "@nestjs/typeorm": "^11.0.0", + 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"glob": "^7.1.3" + }, + "bin": { + "rimraf": "bin.js" + } + }, + "node_modules/rimraf/node_modules/glob": { + "version": "7.2.3", + "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.3.tgz", + "integrity": "sha512-nFR0zLpU2YCaRxwoCJvL6UvCH2JFyFVIvwTLsIf21AuHlMskA1hhTdk+LlYJtOlYt9v6dvszD2BGRqBL+iQK9Q==", + "deprecated": "Glob versions prior to v9 are no longer supported", + "license": "ISC", + "dependencies": { + "fs.realpath": "^1.0.0", + "inflight": "^1.0.4", + "inherits": "2", + "minimatch": "^3.1.1", + "once": "^1.3.0", + "path-is-absolute": "^1.0.0" + }, + "engines": { + "node": "*" + }, + "funding": { + "url": "https://github.com/sponsors/isaacs" + } + }, "node_modules/rollup": { "version": "4.34.8", "resolved": "https://registry.npmjs.org/rollup/-/rollup-4.34.8.tgz", @@ -12293,6 +13059,12 @@ "dev": true, "license": "BSD-3-Clause" }, + "node_modules/seedrandom": { + "version": "3.0.5", + "resolved": "https://registry.npmjs.org/seedrandom/-/seedrandom-3.0.5.tgz", + "integrity": "sha512-8OwmbklUNzwezjGInmZ+2clQmExQPvomqjL7LFqOYqtmuxRgQYqOD3mHaU+MvZn5FLUeVxVfQjwLZW/n/JFuqg==", + "license": "MIT" + }, "node_modules/seek-bzip": { "version": "2.0.0", "resolved": "https://registry.npmjs.org/seek-bzip/-/seek-bzip-2.0.0.tgz", @@ -12447,6 +13219,12 @@ "node": ">= 18" } }, + "node_modules/set-blocking": { + "version": "2.0.0", + "resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz", + "integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==", + "license": "ISC" + }, "node_modules/setprototypeof": { "version": "1.2.0", "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz", @@ -12725,9 +13503,7 @@ "version": "1.0.3", "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz", "integrity": "sha512-D9cPgkvLlV3t3IzL0D0YLvGA9Ahk4PcvVwUbN0dSGr1aP0Nrt4AEnTUbuGvquEC0mA64Gqt1fzirlRs5ibXx8g==", - "dev": true, - "license": "BSD-3-Clause", - "peer": true + "license": "BSD-3-Clause" }, "node_modules/sql-highlight": { "version": "6.0.0", @@ -13154,6 +13930,23 @@ "node": ">=6" } }, + "node_modules/tar": { + "version": "6.2.1", + "resolved": "https://registry.npmjs.org/tar/-/tar-6.2.1.tgz", + "integrity": "sha512-DZ4yORTwrbTj/7MZYq2w+/ZFdI6OZ/f9SFHR+71gIVUZhOQPHzVCLpvRnPgyaMpfWxxk/4ONva3GQSyNIKRv6A==", + "license": "ISC", + "dependencies": { + "chownr": "^2.0.0", + "fs-minipass": "^2.0.0", + "minipass": "^5.0.0", + "minizlib": "^2.1.1", + "mkdirp": "^1.0.3", + "yallist": "^4.0.0" + }, + "engines": { + "node": ">=10" + } + }, "node_modules/tar-stream": { "version": "3.1.7", "resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-3.1.7.tgz", @@ -13166,6 +13959,33 @@ "streamx": "^2.15.0" } }, + "node_modules/tar/node_modules/minipass": { + "version": "5.0.0", + "resolved": "https://registry.npmjs.org/minipass/-/minipass-5.0.0.tgz", + "integrity": "sha512-3FnjYuehv9k6ovOEbyOswadCDPX1piCfhV8ncmYtHOjuPwylVWsghTLo7rabjC3Rx5xD4HDx8Wm1xnMF7S5qFQ==", + "license": "ISC", + "engines": { + "node": ">=8" + } + }, + "node_modules/tar/node_modules/mkdirp": { + "version": "1.0.4", + "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.4.tgz", + "integrity": "sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==", + "license": "MIT", + "bin": { + "mkdirp": "bin/cmd.js" + }, + "engines": { + "node": ">=10" + } + }, + "node_modules/tar/node_modules/yallist": { + "version": "4.0.0", + "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz", + "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==", + "license": "ISC" + }, "node_modules/terser": { "version": "5.39.0", "resolved": "https://registry.npmjs.org/terser/-/terser-5.39.0.tgz", @@ -13491,6 +14311,12 @@ "url": "https://github.com/sponsors/Borewit" } }, + "node_modules/tr46": { + "version": "0.0.3", + "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz", + "integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw==", + "license": "MIT" + }, "node_modules/tree-kill": { "version": "1.2.2", "resolved": "https://registry.npmjs.org/tree-kill/-/tree-kill-1.2.2.tgz", @@ -14400,6 +15226,12 @@ "url": "https://github.com/sponsors/sindresorhus" } }, + "node_modules/webidl-conversions": { + "version": "3.0.1", + "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz", + "integrity": "sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==", + "license": "BSD-2-Clause" + }, "node_modules/webpack": { "version": "5.98.0", "resolved": "https://registry.npmjs.org/webpack/-/webpack-5.98.0.tgz", @@ -14577,6 +15409,16 @@ "url": "https://opencollective.com/webpack" } }, + "node_modules/whatwg-url": { + "version": "5.0.0", + "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz", + "integrity": "sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==", + "license": "MIT", + "dependencies": { + "tr46": "~0.0.3", + "webidl-conversions": "^3.0.0" + } + }, "node_modules/which": { "version": "2.0.2", "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz", @@ -14609,6 +15451,15 @@ "node": ">=8" } }, + "node_modules/wide-align": { + "version": "1.1.5", + "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.5.tgz", + "integrity": "sha512-eDMORYaPNZ4sQIuuYPDHdQvf4gyCF9rEEV/yPxGfwPkRodwEgiMUUXTx/dex+Me0wxx53S+NgUHaP7y3MGlDmg==", + "license": "ISC", + "dependencies": { + "string-width": "^1.0.2 || 2 || 3 || 4" + } + }, "node_modules/word-wrap": { "version": "1.2.5", "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz", diff --git a/package.json b/package.json index d710d7f..4d4591c 100644 --- a/package.json +++ b/package.json @@ -33,6 +33,7 @@ "@nestjs/platform-express": "^11.0.1", "@nestjs/swagger": "^11.0.6", "@nestjs/typeorm": "^11.0.0", + "@tensorflow/tfjs-node": "^4.22.0", "@types/bcrypt": "^5.0.2", "bcryptjs": "^3.0.2", "class-transformer": "^0.5.1", From de1b3b0a2e4436f02485881a564a24d2a932b49d Mon Sep 17 00:00:00 2001 From: Andres Alvarez Date: Sun, 27 Apr 2025 00:53:09 -0400 Subject: [PATCH 3/7] Create nearest neighbor unsupervised model --- src/recommendation/model.ts | 52 +++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 src/recommendation/model.ts diff --git a/src/recommendation/model.ts b/src/recommendation/model.ts new file mode 100644 index 0000000..1e6cce4 --- /dev/null +++ b/src/recommendation/model.ts @@ -0,0 +1,52 @@ +import * as tf from '@tensorflow/tfjs'; +import { PRODUCT_MAPPING } from './data'; + +export class NearestNeighbors { + neighbors: number; + data: tf.Tensor[]; + constructor(neighbors = 5) { + this.neighbors = neighbors; + this.data = []; + } + + fit(data: tf.Tensor[]) { + this.data = data; + } + + cosineSimilarity(a: tf.Tensor, b: tf.Tensor) { + const dotProduct = tf.dot(a, b).dataSync()[0]; + const magnitudeA = tf.norm(a).dataSync()[0]; + const magnitudeB = tf.norm(b).dataSync()[0]; + return dotProduct / (magnitudeA * magnitudeB); + } + + euclideanDistance(a: tf.Tensor, b: tf.Tensor) { + return tf.sqrt(tf.squaredDifference(a, b)).dataSync()[0]; + } + + kneighbors(point: tf.Tensor) { + const distances = this.data.map((datapoint, index) => ({ + index, + distance: this.cosineSimilarity(point, datapoint), + })); + + distances.sort((a, b) => a.distance - b.distance); + + const neighborsIndices = distances + .slice(0, this.neighbors) + .map((item) => item.index); + const neighbors = neighborsIndices.map((index) => this.data[index]); + + const result = { + neighbors, + distances: distances + .slice(0, this.neighbors) + .map((item) => item.distance), + }; + const recommendations = result.neighbors.map((neighbor) => { + const productIndex = neighbor.argMax(0).dataSync()[0]; + return PRODUCT_MAPPING[productIndex as keyof typeof PRODUCT_MAPPING]; + }); + return recommendations; + } +} From 66ab370e1ad6fb3c2084e96919d209aad29e2333 Mon Sep 17 00:00:00 2001 From: Andres Alvarez Date: Sun, 27 Apr 2025 00:53:59 -0400 Subject: [PATCH 4/7] Create recommendation service to process data to use nearest neighbor model recommender --- src/recommendation/recommendation.module.ts | 12 ++++ src/recommendation/recommendation.service.ts | 74 ++++++++++++++++++++ 2 files changed, 86 insertions(+) create mode 100644 src/recommendation/recommendation.module.ts create mode 100644 src/recommendation/recommendation.service.ts diff --git a/src/recommendation/recommendation.module.ts b/src/recommendation/recommendation.module.ts new file mode 100644 index 0000000..911107d --- /dev/null +++ b/src/recommendation/recommendation.module.ts @@ -0,0 +1,12 @@ +import { Module } from '@nestjs/common'; +import { RecommendationService } from './recommendation.service'; +import { TypeOrmModule } from '@nestjs/typeorm'; +import { ProductPresentation } from 'src/products/entities/product-presentation.entity'; +import { Product } from 'src/products/entities/product.entity'; + +@Module({ + imports: [TypeOrmModule.forFeature([ProductPresentation, Product])], + controllers: [], + providers: [RecommendationService], +}) +export class RecommendationModule {} diff --git a/src/recommendation/recommendation.service.ts b/src/recommendation/recommendation.service.ts new file mode 100644 index 0000000..dcc6cc3 --- /dev/null +++ b/src/recommendation/recommendation.service.ts @@ -0,0 +1,74 @@ +import { Injectable } from '@nestjs/common'; +import { InjectRepository } from '@nestjs/typeorm'; +import { ProductPresentation } from 'src/products/entities/product-presentation.entity'; +import { Repository } from 'typeorm'; +import * as tf from '@tensorflow/tfjs'; +import { NearestNeighbors } from './model'; +import { PRODUCT_MAPPING, RECOMMENDATION_DATA } from './data'; +import { Product } from 'src/products/entities/product.entity'; + +export type ProductData = { + name: string; + totalBought: number; +}; + +@Injectable() +export class RecommendationService { + constructor( + @InjectRepository(ProductPresentation) + private readonly productPresentationRepository: Repository, + @InjectRepository(Product) + private readonly productRepository: Repository, + ) {} + + async getProductsId(productNames: string[]): Promise { + const products: { id: string }[] = await this.productRepository + .createQueryBuilder('product') + .select('id') + .where('product.name IN (:...productNames)', { productNames }) + .getRawMany(); + return products.map((product) => product.id); + } + + async getProductsByUserId(userId: string): Promise { + const products: { name: string; totalBought: number }[] = + await this.productPresentationRepository + .createQueryBuilder('productPresentation') + .select('product.name', 'name') + .addSelect('COALESCE(SUM(orderDetail.quantity), 0)', 'totalBought') + .leftJoin('productPresentation.product', 'product') + .leftJoin('productPresentation.orders', 'orderDetail') + .leftJoin('orderDetail.order', 'order') + .andWhere('order.user_id = :userId OR order.user_id IS NULL', { + userId, + }) + .andWhere('order.status = :status', { status: 'completed' }) + .groupBy('product.name') + .orderBy('product.name', 'ASC') + .getRawMany(); + const completeProductData: ProductData[] = Object.values( + PRODUCT_MAPPING, + ).map((productName) => { + const existingProduct: ProductData | undefined = products.find( + (p) => p.name === productName, + ); + return existingProduct ?? { name: productName, totalBought: 0 }; + }); + return completeProductData; + } + + async recommend(userId: string): Promise { + const productData = await this.getProductsByUserId(userId); + const recommender = new NearestNeighbors(3); + recommender.fit(RECOMMENDATION_DATA); + const productsTensor = tf.tensor( + productData.map((product) => + Number(product.totalBought) ? product.totalBought : 0, + ), + [12], + 'float32', + ); + const recommendations = recommender.kneighbors(productsTensor); + return this.getProductsId(recommendations); + } +} From 1a12558bbec7e677043093882588dec4a6358779 Mon Sep 17 00:00:00 2001 From: Andres Alvarez Date: Sun, 27 Apr 2025 00:54:21 -0400 Subject: [PATCH 5/7] Register recommender service --- src/products/products.module.ts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/products/products.module.ts b/src/products/products.module.ts index 43307bc..4526f3c 100644 --- a/src/products/products.module.ts +++ b/src/products/products.module.ts @@ -25,6 +25,7 @@ import { ProductImageService } from './services/product-image.service'; import { ProductCategoryController } from './controllers/product-category.controller'; import { ProductCategoryService } from './services/product-category.service'; import { CategoryService } from 'src/category/category.service'; +import { RecommendationService } from 'src/recommendation/recommendation.service'; @Module({ imports: [ @@ -59,6 +60,7 @@ import { CategoryService } from 'src/category/category.service'; ProductPresentationService, ProductImageService, ProductCategoryService, + RecommendationService, ], }) export class ProductsModule {} From 379c3910ae3faccea4f323ce6e31623eb8b5d3a1 Mon Sep 17 00:00:00 2001 From: Andres Alvarez Date: Sun, 27 Apr 2025 00:54:55 -0400 Subject: [PATCH 6/7] Create endpoint to get recommendations in base of the user request --- src/products/products.controller.ts | 40 +++++++++++++++++++++++++++-- 1 file changed, 38 insertions(+), 2 deletions(-) diff --git a/src/products/products.controller.ts b/src/products/products.controller.ts index ac82c33..d73e5d1 100644 --- a/src/products/products.controller.ts +++ b/src/products/products.controller.ts @@ -1,4 +1,11 @@ -import { Controller, Get, Query, UseInterceptors } from '@nestjs/common'; +import { + Controller, + Get, + Query, + Req, + UseGuards, + UseInterceptors, +} from '@nestjs/common'; import { ProductsService } from './products.service'; import { ApiExtraModels, @@ -11,11 +18,16 @@ import { ProductPresentationDTO, ProductQueryDTO } from './dto/product.dto'; import { PaginationDTO } from 'src/utils/dto/pagination.dto'; import { PaginationInterceptor } from 'src/utils/pagination.interceptor'; import { plainToInstance } from 'class-transformer'; +import { AuthGuard, CustomRequest } from 'src/auth/auth.guard'; +import { RecommendationService } from 'src/recommendation/recommendation.service'; @Controller('product') @ApiExtraModels(PaginationDTO, ProductPresentationDTO) export class ProductsController { - constructor(private productsServices: ProductsService) {} + constructor( + private productsServices: ProductsService, + private recommendationService: RecommendationService, + ) {} @Get() @UseInterceptors(PaginationInterceptor) @ApiOperation({ @@ -133,4 +145,28 @@ export class ProductsController { total, }; } + + @UseGuards(AuthGuard) + @Get('recommendations') + async getProductRecommendations(@Req() req: CustomRequest) { + const userId = req.user.id; + const recommendations = await this.recommendationService.recommend(userId); + const products = await this.productsServices.getProducts( + 1, + 10, + undefined, + [], + [], + [], + [], + recommendations, + ); + return { + data: plainToInstance(ProductPresentationDTO, products.products, { + excludeExtraneousValues: true, + enableImplicitConversion: true, + }), + total: products.total, + }; + } } From e425d0d20d7e0416fb3ffba511ef8ea97f8ed9da Mon Sep 17 00:00:00 2001 From: Andres Alvarez Date: Sun, 27 Apr 2025 00:55:14 -0400 Subject: [PATCH 7/7] Register recommend module --- src/app.module.ts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/app.module.ts b/src/app.module.ts index 92929af..65a1360 100644 --- a/src/app.module.ts +++ b/src/app.module.ts @@ -18,6 +18,7 @@ import { DiscountModule } from './discount/discount.module'; import { PaymentModule } from './payments/payment.module'; import { OrderModule } from './order/order.module'; import { NotificationModule } from './notification/notification.module'; +import { RecommendationModule } from './recommendation/recommendation.module'; @Module({ imports: [ @@ -59,6 +60,7 @@ import { NotificationModule } from './notification/notification.module'; PaymentModule, OrderModule, NotificationModule, + RecommendationModule, ], controllers: [AppController], providers: [AppService],