pc_builder/app/controllers/scraped_parts_controller.ts

import type { HttpContext } from '@adonisjs/core/http'
import vine from '@vinejs/vine'
import ScrapedPart from '#models/scraped_part'
import ComponentType from '#models/component_type'
import {
  ensureFreshCategory,
  updatePriceIfCheaper,
  clearPriceIfNoOffers,
} from '#services/part_scraper_service'
import { findCheapestOffers } from '#services/merchant_price_service'

const SEARCH_RESULTS_LIMIT = 150

const searchValidator = vine.compile(
  vine.object({
    q: vine.string().trim().minLength(1).optional(),
    typeId: vine.number().min(1).optional(),
  })
)

const compareValidator = vine.compile(
  vine.object({
    id: vine.number().min(1),
  })
)

export default class ScrapedPartsController {
  /**
   * Search the new-parts cache (scraped from pc-builder.io) by name and/or
   * component type. Read-only, authenticated (the search UI lives inside
   * the authenticated "create component" flow).
   *
   * When a typeId is given, the corresponding category cache is refreshed
   * synchronously first if it's missing or older than 24h (see
   * part_scraper_service.CACHE_TTL_HOURS), so results stay reasonably
   * fresh without needing an external cron job. Free-text searches across
   * all types skip this eager refresh to avoid re-scraping every mapped
   * category on every keystroke; run `node ace scrape:parts` to refresh
   * everything at once.
   *
   * Results are ordered with a resolved price first (cheapest first), then
   * parts with no known price yet (see ScrapedPart.price doc) last — so a
   * part is never hidden just because pc-builder.io hasn't found a fixed
   * Amazon offer for it, but priced parts still surface first.
   */
  async index({ request, auth, response }: HttpContext) {
    await auth.authenticate()
    const { q, typeId } = await request.validateUsing(searchValidator)

    if (typeId) {
      const componentType = await ComponentType.find(typeId)
      if (componentType) {
        await ensureFreshCategory(componentType)
      }
    }

    const query = ScrapedPart.query()
      .preload('type')
      .orderByRaw('price IS NULL, price ASC, name ASC')

    if (q) {
      query.whereRaw('LOWER(name) LIKE ?', [`%${q.toLowerCase()}%`])
    }
    if (typeId) {
      query.where('typeId', typeId)
    }

    const parts = await query.limit(SEARCH_RESULTS_LIMIT)
    return response.json(parts.map((part) => part.serialize()))
  }

  /**
   * Compares live prices for a given scraped part across Amazon, LDLC,
   * Grosbill, TopAchat, Materiel.net, Cdiscount and PCComponentes, and
   * returns them sorted cheapest first. Triggered on demand (one part at a
   * time) rather than for every search result, since it makes several
   * outbound requests and can take a few seconds.
   *
   * If the cheapest offer found beats the part's currently stored price
   * (or no price was known yet), it's persisted as the new default price
   * (see updatePriceIfCheaper) — so this comparison benefits every future
   * search/import for this part, not just the current user.
   *
   * If NO merchant confirms a price at all, the part's price is cleared
   * to null (see clearPriceIfNoOffers) rather than silently keeping a
   * pc-builder.io catalog price the user just explicitly asked to verify
   * and that no longer checks out anywhere.
   */
  async compare({ request, auth, response }: HttpContext) {
    await auth.authenticate()
    const { id } = await request.validateUsing(compareValidator)

    const part = await ScrapedPart.find(id)
    if (!part) {
      return response.notFound({ offers: [] })
    }

    const amazonUrl = part.sourceUrl.includes('amazon.') ? part.sourceUrl : null
    const offers = await findCheapestOffers(part.name, amazonUrl)

    if (offers.length > 0) {
      await updatePriceIfCheaper(part, offers[0])
    } else {
      await clearPriceIfNoOffers(part)
    }

    return response.json({ offers, price: part.price })
  }
}