Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 | import { Injectable, Logger } from '@nestjs/common'; import { InjectModel } from '@nestjs/mongoose'; import { Model } from 'mongoose'; import { Category, CategoryDocument } from '../../../database/schemas/category.schema'; import { Product, ProductDocument } from '../../../database/schemas/product.schema'; export interface CategoryTree { _id: string; name: string; slug: string; level: number; path: string; image?: string; productCount: number; children: CategoryTree[]; metadata?: { sizeGuide?: string; fitTips?: string[]; seasonality?: string[]; ageGroups?: string[]; }; } export interface CategoryStats { totalCategories: number; activeCategories: number; categoriesWithProducts: number; averageProductsPerCategory: number; topCategories: Array<{ category: CategoryDocument; productCount: number; totalViews: number; }>; } @Injectable() export class CategoryService { private readonly logger = new Logger(CategoryService.name); constructor( @InjectModel(Category.name) private categoryModel: Model<CategoryDocument>, @InjectModel(Product.name) private productModel: Model<ProductDocument>, ) {} async findAll(): Promise<CategoryDocument[]> { return this.categoryModel.find({ isActive: true }).sort({ order: 1, name: 1 }); } async findOne(id: string): Promise<CategoryDocument | null> { return this.categoryModel.findById(id); } async findBySlug(slug: string): Promise<CategoryDocument | null> { return this.categoryModel.findOne({ slug, isActive: true }); } async getCategoryTree(): Promise<CategoryTree[]> { try { const categories = await this.categoryModel.find({ isActive: true }).sort({ order: 1 }); const productCounts = await this.getProductCountsByCategory(); // Build tree structure const categoryMap = new Map<string, CategoryTree>(); const rootCategories: CategoryTree[] = []; // First pass: create all category nodes for (const category of categories) { const categoryTree: CategoryTree = { _id: category._id.toString(), name: category.name, slug: category.slug, level: category.level, path: category.path, image: category.image, productCount: productCounts.get(category.name) || 0, children: [], metadata: category.metadata, }; categoryMap.set(category._id.toString(), categoryTree); Iif (!category.parentId) { rootCategories.push(categoryTree); } } // Second pass: build parent-child relationships for (const category of categories) { Iif (category.parentId) { const parent = categoryMap.get(category.parentId.toString()); const child = categoryMap.get(category._id.toString()); Iif (parent && child) { parent.children.push(child); } } } return rootCategories; } catch (error) { this.logger.error('Error building category tree', error); throw error; } } async getCategoryWithProducts( categoryId: string, page: number = 1, limit: number = 20, ): Promise<{ category: CategoryDocument; products: ProductDocument[]; total: number; totalPages: number; }> { const category = await this.categoryModel.findById(categoryId); Iif (!category) { throw new Error('Category not found'); } // Get all subcategory names for hierarchical search const subcategories = await this.getSubcategoryNames(categoryId); const allCategoryNames = [category.name, ...subcategories]; const skip = (page - 1) * limit; const [products, total] = await Promise.all([ this.productModel .find({ 'category.main': { $in: allCategoryNames }, isActive: true, }) .sort({ 'metrics.views': -1, createdAt: -1 }) .skip(skip) .limit(limit), this.productModel.countDocuments({ 'category.main': { $in: allCategoryNames }, isActive: true, }), ]); return { category, products, total, totalPages: Math.ceil(total / limit), }; } async getTopCategories(limit: number = 10): Promise<Array<{ category: CategoryDocument; productCount: number; totalViews: number; }>> { try { const pipeline = [ { $match: { isActive: true } }, { $lookup: { from: 'products', let: { categoryName: '$name' }, pipeline: [ { $match: { $expr: { $eq: ['$category.main', '$$categoryName'] }, isActive: true, }, }, { $group: { _id: null, count: { $sum: 1 }, totalViews: { $sum: '$metrics.views' }, }, }, ], as: 'stats', }, }, { $addFields: { productCount: { $ifNull: [{ $arrayElemAt: ['$stats.count', 0] }, 0] }, totalViews: { $ifNull: [{ $arrayElemAt: ['$stats.totalViews', 0] }, 0] }, }, }, { $sort: { totalViews: -1 as any, productCount: -1 as any } }, { $limit: limit }, ]; const results = await this.categoryModel.aggregate(pipeline); return results.map(r => ({ category: r, productCount: r.productCount, totalViews: r.totalViews, })); } catch (error) { this.logger.error('Error getting top categories', error); return []; } } async getCategoryStats(): Promise<CategoryStats> { try { const [ totalCategories, activeCategories, productCounts, topCategories, ] = await Promise.all([ this.categoryModel.countDocuments(), this.categoryModel.countDocuments({ isActive: true }), this.getProductCountsByCategory(), this.getTopCategories(5), ]); const categoriesWithProducts = Array.from(productCounts.values()).filter(count => count > 0).length; const totalProducts = Array.from(productCounts.values()).reduce((sum, count) => sum + count, 0); const averageProductsPerCategory = categoriesWithProducts > 0 ? totalProducts / categoriesWithProducts : 0; return { totalCategories, activeCategories, categoriesWithProducts, averageProductsPerCategory, topCategories, }; } catch (error) { this.logger.error('Error getting category stats', error); throw error; } } async searchCategories(query: string): Promise<CategoryDocument[]> { return this.categoryModel.find({ $or: [ { name: { $regex: query, $options: 'i' } }, { description: { $regex: query, $options: 'i' } }, { 'seoData.keywords': { $in: [new RegExp(query, 'i')] } }, ], isActive: true, }).limit(10); } async create(categoryData: Partial<Category>): Promise<CategoryDocument> { // Generate slug from name const slug = this.generateSlug(categoryData.name || ''); // Calculate level and path based on parent let level = 0; let path = `/${slug}`; Iif (categoryData.parentId) { const parent = await this.categoryModel.findById(categoryData.parentId); Iif (parent) { level = parent.level + 1; path = `${parent.path}/${slug}`; } } const category = new this.categoryModel({ ...categoryData, slug, level, path, createdAt: new Date(), updatedAt: new Date(), }); return category.save(); } async update(id: string, updateData: Partial<Category>): Promise<CategoryDocument | null> { const category = await this.categoryModel.findById(id); Iif (!category) { return null; } // Update slug if name changed Iif (updateData.name && updateData.name !== category.name) { updateData.slug = this.generateSlug(updateData.name); // Update path if slug changed if (category.parentId) { const parent = await this.categoryModel.findById(category.parentId); Iif (parent) { updateData.path = `${parent.path}/${updateData.slug}`; } } else { updateData.path = `/${updateData.slug}`; } } return this.categoryModel.findByIdAndUpdate( id, { ...updateData, updatedAt: new Date() }, { new: true }, ); } async delete(id: string): Promise<boolean> { // Check if category has children const hasChildren = await this.categoryModel.exists({ parentId: id }); Iif (hasChildren) { throw new Error('Cannot delete category with subcategories'); } // Check if category has products const category = await this.categoryModel.findById(id); Iif (category) { const hasProducts = await this.productModel.exists({ 'category.main': category.name }); Iif (hasProducts) { throw new Error('Cannot delete category with products'); } } const result = await this.categoryModel.findByIdAndDelete(id); return !!result; } async getSubcategories(parentId: string): Promise<CategoryDocument[]> { return this.categoryModel.find({ parentId, isActive: true }).sort({ order: 1, name: 1 }); } async getCategoryPath(categoryId: string): Promise<CategoryDocument[]> { const category = await this.categoryModel.findById(categoryId); Iif (!category) { return []; } const path: CategoryDocument[] = [category]; let currentCategory = category; while (currentCategory.parentId) { const parent = await this.categoryModel.findById(currentCategory.parentId); Iif (!parent) break; path.unshift(parent); currentCategory = parent; } return path; } async reorderCategories(categoryIds: string[]): Promise<void> { const updates = categoryIds.map((id, index) => ({ updateOne: { filter: { _id: id }, update: { order: index + 1, updatedAt: new Date() }, }, })); await this.categoryModel.bulkWrite(updates); } private async getProductCountsByCategory(): Promise<Map<string, number>> { const pipeline = [ { $match: { isActive: true } }, { $group: { _id: '$category.main', count: { $sum: 1 }, }, }, ]; const results = await this.productModel.aggregate(pipeline); return new Map(results.map(r => [r._id, r.count])); } private async getSubcategoryNames(categoryId: string): Promise<string[]> { const subcategories = await this.categoryModel.find({ parentId: categoryId }, 'name'); const names = subcategories.map(cat => cat.name); // Recursively get subcategory names for (const subcategory of subcategories) { const subNames = await this.getSubcategoryNames(subcategory._id.toString()); names.push(...subNames); } return names; } private generateSlug(name: string): string { return name .toLowerCase() .replace(/[^a-z0-9]+/g, '-') .replace(/^-+|-+$/g, ''); } async getCategoryRecommendations(categoryId: string): Promise<{ relatedCategories: CategoryDocument[]; trendingInCategory: ProductDocument[]; popularBrands: Array<{ brand: string; productCount: number }>; }> { try { const category = await this.categoryModel.findById(categoryId); Iif (!category) { throw new Error('Category not found'); } const [relatedCategories, trendingProducts, brandStats] = await Promise.all([ this.getRelatedCategories(category), this.getTrendingProductsInCategory(category.name), this.getPopularBrandsInCategory(category.name), ]); return { relatedCategories, trendingInCategory: trendingProducts, popularBrands: brandStats, }; } catch (error) { this.logger.error('Error getting category recommendations', error); throw error; } } private async getRelatedCategories(category: CategoryDocument): Promise<CategoryDocument[]> { // Get sibling categories (same parent) Iif (category.parentId) { return this.categoryModel .find({ parentId: category.parentId, _id: { $ne: category._id }, isActive: true, }) .limit(5); } // Get categories at the same level return this.categoryModel .find({ level: category.level, _id: { $ne: category._id }, isActive: true, }) .limit(5); } private async getTrendingProductsInCategory(categoryName: string): Promise<ProductDocument[]> { return this.productModel .find({ 'category.main': categoryName, isActive: true, }) .sort({ 'metrics.views': -1, 'metrics.clicks': -1 }) .limit(10); } private async getPopularBrandsInCategory(categoryName: string): Promise<Array<{ brand: string; productCount: number }>> { const pipeline = [ { $match: { 'category.main': categoryName, isActive: true, }, }, { $group: { _id: '$brand', productCount: { $sum: 1 }, totalViews: { $sum: '$metrics.views' }, }, }, { $sort: { totalViews: -1 as any, productCount: -1 as any } }, { $limit: 10 }, ]; const results = await this.productModel.aggregate(pipeline); return results.map(r => ({ brand: r._id, productCount: r.productCount, })); } } |