Fase 2 ADR 0006 Etapa 2: plugin de Meilisearch + ruta de facetas

Instala @rokmohar/medusa-plugin-meilisearch@^1.4.1 (linea v1, la unica
compatible con nuestro Medusa 2.18.0 exacto -- confirmado contra
peerDependencies reales de npm: @medusajs/* ^2.15.2, satisfecho por
2.18.0). Conectado via un array `plugins:` nuevo en medusa-config.ts
(primer uso en este repo, no `modules:`), env vars leidos con `?? ""`
en vez de required() -- si Meilisearch esta caido o mal configurado,
el plugin se degrada solo en vez de tumbar el arranque de Medusa
entero.

No se escribe un subscriber propio: se verifico contra el codigo
fuente real del paquete (descargado el tarball exacto de npm,
inspeccionado en /app/node_modules dentro de una imagen Docker de
verdad) que trae sus propios subscribers de product/category/
collection/variant/etc, descubiertos por Medusa en runtime desde
dentro del propio paquete -- confirmado que sobreviven a
`npm prune --omit=dev` y llegan intactos a la imagen final. Tambien
trae un job de indexado inicial de una sola corrida al boot
(numberOfExecutions: 1, no un cron recurrente -- no viola la
restriccion del ADR de "nunca cron").

Nueva ruta Store API propia (src/api/store/search/route.ts): las
rutas /store/meilisearch/* que trae el plugin no devuelven
facetDistribution (verificado leyendo su codigo fuente), asi que esta
ruta pide facets explicitamente via additionalOptions.facets, y
despues re-hidrata los productos via query.graph (mismos campos que
ya usa el storefront) en vez de confiar en precios/inventario
indexados -- mismo patron "safe path" que ya usa la ruta oficial del
plugin para /store/meilisearch/products.

Transformer custom en medusa-config.ts que espeja mapProduct() del
storefront (category/collection/brand/ageRange desde metadata,
disponibilidad desde la primera variante) para que el documento
indexado sea exactamente lo que el storefront ya muestra.

Validado en vivo: build completo de Docker (target builder) corre
limpio -- npm ci, medusa build (typecheck + compile backend/frontend),
npm prune -- cero errores. package-lock.json regenerado con un
contenedor node:22.18.0-bookworm-slim real (mismo base image que el
Dockerfile), no a mano.

Dockerfile: dummy MEILISEARCH_HOST/MEILISEARCH_API_KEY en el stage de
build (insurance barata, no son required() asi que no eran
estrictamente necesarios para que el build pasara, y de hecho paso
sin ellos en la prueba -- se dejan de todas formas por consistencia
con el resto de dummies de esa capa).

workloads/commerce-backend/Dockerfile

@@ -21,7 +21,9 @@ ENV CI=true \
     S3_ACCESS_KEY_ID=build-access-key \
     S3_SECRET_ACCESS_KEY=build-secret-key \
     S3_BUCKET=ari-shopping \
-    S3_ENDPOINT=http://127.0.0.1:9000
+    S3_ENDPOINT=http://127.0.0.1:9000 \
+    MEILISEARCH_HOST=http://127.0.0.1:7700 \
+    MEILISEARCH_API_KEY=build-only-meili-key
 
 COPY package.json package-lock.json .npmrc ./
 

workloads/commerce-backend/medusa-config.ts

@@ -10,6 +10,79 @@ const required = (name: string): string => {
   return value
 }
 
+// Mismos campos derivados de metadata/categories/collection/variants que
+// mapProduct() en workloads/ecommerce/lib/headless/providers/medusa.ts --
+// el documento indexado debe reflejar exactamente lo que el storefront
+// ya muestra, no una vista distinta del catálogo.
+function stringMetadata(
+  metadata: Record<string, unknown> | null | undefined,
+  key: string,
+): string {
+  const value = metadata?.[key]
+  return typeof value === "string" ? value : ""
+}
+
+function booleanMetadata(
+  metadata: Record<string, unknown> | null | undefined,
+  key: string,
+): boolean {
+  const value = metadata?.[key]
+  return value === true || value === "true"
+}
+
+async function meilisearchProductTransformer(
+  document: Record<string, unknown>,
+) {
+  const metadata = (document.metadata ?? null) as Record<
+    string,
+    unknown
+  > | null
+  const categories = document.categories as
+    | Array<{ name?: string | null }>
+    | null
+    | undefined
+  const collection = document.collection as { title?: string | null } | null
+  const variants = document.variants as
+    | Array<{
+        inventory_quantity?: number | null
+        manage_inventory?: boolean | null
+        allow_backorder?: boolean | null
+        calculated_price?: { calculated_amount?: number | null } | null
+      }>
+    | null
+    | undefined
+  const variant = variants?.[0]
+  const tags = document.tags as Array<{ value?: string | null }> | null
+
+  const category =
+    categories?.[0]?.name || stringMetadata(metadata, "category") || "Variedades"
+
+  const available =
+    !variant ||
+    variant.allow_backorder === true ||
+    variant.manage_inventory === false ||
+    (variant.inventory_quantity ?? 0) > 0
+
+  return {
+    id: document.id,
+    name: document.title || "Producto ARI Shopping",
+    shortDescription: document.subtitle || document.title || "",
+    description: document.description || "",
+    category,
+    collection: collection?.title || stringMetadata(metadata, "collection") || "",
+    brand: stringMetadata(metadata, "brand") || "ARI Shopping",
+    ageRange: stringMetadata(metadata, "ageRange") || "Todas",
+    tags: (tags || []).map((tag) => tag.value).filter(Boolean),
+    price:
+      typeof variant?.calculated_price?.calculated_amount === "number"
+        ? variant.calculated_price.calculated_amount
+        : null,
+    available,
+    isNew: booleanMetadata(metadata, "isNew"),
+    featured: booleanMetadata(metadata, "featured"),
+  }
+}
+
 module.exports = defineConfig({
   projectConfig: {
     databaseUrl: required("DATABASE_URL"),
@@ -73,4 +146,71 @@ module.exports = defineConfig({
       },
     },
   ],
+
+  // ADR 0006 Etapa 2. Sin required(): a diferencia de S3/DB, Meilisearch
+  // es un servicio nuevo y todavia no probado en produccion en un host
+  // con historial de swap saturado -- si esta caido o mal configurado,
+  // el plugin se degrada solo (soporta enabled:false, "silently skipped"
+  // segun su propio README) en vez de tumbar el arranque de Medusa
+  // entero, que es lo que si haria required().
+  plugins: [
+    {
+      resolve: "@rokmohar/medusa-plugin-meilisearch",
+      options: {
+        config: {
+          host: process.env.MEILISEARCH_HOST ?? "",
+          apiKey: process.env.MEILISEARCH_API_KEY ?? "",
+        },
+        settings: {
+          products: {
+            type: "products",
+            enabled: Boolean(process.env.MEILISEARCH_HOST),
+            primaryKey: "id",
+            // Campos que el plugin pide via query.graph antes de pasarlos
+            // al transformer de arriba -- si falta alguno acá, llega
+            // undefined al transformer sin importar lo que este haga.
+            fields: [
+              "id",
+              "title",
+              "subtitle",
+              "description",
+              "handle",
+              "status",
+              "thumbnail",
+              "metadata",
+              "tags.value",
+              "categories.name",
+              "collection.title",
+              "variants.inventory_quantity",
+              "variants.manage_inventory",
+              "variants.allow_backorder",
+              "variants.calculated_price.calculated_amount",
+            ],
+            indexSettings: {
+              // Tabla de ADR 0006 §3: Buscable / Filtrable-faceta / Ordenable.
+              searchableAttributes: [
+                "name",
+                "shortDescription",
+                "description",
+                "category",
+                "collection",
+                "brand",
+                "tags",
+              ],
+              filterableAttributes: [
+                "category",
+                "collection",
+                "brand",
+                "ageRange",
+                "price",
+                "available",
+              ],
+              sortableAttributes: ["price", "isNew", "featured"],
+            },
+            transformer: meilisearchProductTransformer,
+          },
+        },
+      },
+    },
+  ],
 })

workloads/commerce-backend/package-lock.json

@@ -12,7 +12,8 @@
         "@medusajs/admin-sdk": "2.18.0",
         "@medusajs/cli": "2.18.0",
         "@medusajs/framework": "2.18.0",
-        "@medusajs/medusa": "2.18.0"
+        "@medusajs/medusa": "2.18.0",
+        "@rokmohar/medusa-plugin-meilisearch": "^1.4.1"
       },
       "devDependencies": {
         "@swc/core": "^1.7.28",
@@ -6561,6 +6562,28 @@
         "node": ">=14.0.0"
       }
     },
+    "node_modules/@rokmohar/medusa-plugin-meilisearch": {
+      "version": "1.4.3",
+      "resolved": "https://registry.npmjs.org/@rokmohar/medusa-plugin-meilisearch/-/medusa-plugin-meilisearch-1.4.3.tgz",
+      "integrity": "sha512-+iStv5sc2vuLk+O7OcQLlNR99fMBhGdBOJMCmDJYoTFGhzBA4ZEV18IIr2xqxUDgdQo1haF0TtYv3JmRQUuY1w==",
+      "license": "MIT",
+      "dependencies": {
+        "meilisearch": "^0.56.0"
+      },
+      "engines": {
+        "node": ">=22"
+      },
+      "peerDependencies": {
+        "@medusajs/admin-sdk": "^2.15.2",
+        "@medusajs/framework": "^2.15.2",
+        "@medusajs/medusa": "^2.15.2",
+        "@medusajs/ui": "^4.1.12",
+        "@tanstack/react-query": "5.64.2",
+        "awilix": "^8.0.1",
+        "react": "^18",
+        "react-dom": "^18"
+      }
+    },
     "node_modules/@rolldown/pluginutils": {
       "version": "1.0.0-beta.27",
       "resolved": "https://registry.npmjs.org/@rolldown/pluginutils/-/pluginutils-1.0.0-beta.27.tgz",
@@ -11774,6 +11797,12 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/meilisearch": {
+      "version": "0.56.0",
+      "resolved": "https://registry.npmjs.org/meilisearch/-/meilisearch-0.56.0.tgz",
+      "integrity": "sha512-kBXba8DcSrLWHYqopCm2JL90oBy97VdIfHkP1ii7/eHufeEEEk9Zu5Vv/IFQpNzmhEpWszVFVlGvZoI6QJeGzA==",
+      "license": "MIT"
+    },
     "node_modules/merge-descriptors": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/merge-descriptors/-/merge-descriptors-1.0.3.tgz",

workloads/commerce-backend/package.json

@@ -14,7 +14,8 @@
     "@medusajs/admin-sdk": "2.18.0",
     "@medusajs/cli": "2.18.0",
     "@medusajs/framework": "2.18.0",
-    "@medusajs/medusa": "2.18.0"
+    "@medusajs/medusa": "2.18.0",
+    "@rokmohar/medusa-plugin-meilisearch": "^1.4.1"
   },
   "devDependencies": {
     "@swc/core": "^1.7.28",

workloads/commerce-backend/src/api/store/search/route.ts

@@ -0,0 +1,161 @@
+import type { MedusaRequest, MedusaResponse } from "@medusajs/framework";
+import { ContainerRegistrationKeys } from "@medusajs/framework/utils";
+import {
+  MEILISEARCH_MODULE,
+  type MeiliSearchService,
+} from "@rokmohar/medusa-plugin-meilisearch";
+
+// Las rutas /store/meilisearch/* que trae el plugin (ver ADR 0006 nota de
+// implementacion) no devuelven facetDistribution -- necesitamos esta
+// ruta propia para pedirlo explicitamente via additionalOptions.facets,
+// que el servicio del plugin reenvia tal cual al cliente Meilisearch.
+const FACETS = ["category", "collection", "brand", "ageRange"];
+
+// Mismos campos que ya usa el storefront contra /store/products
+// (workloads/ecommerce/lib/headless/providers/medusa.ts) -- una vez que
+// Meilisearch nos da los ids candidatos, volvemos a Medusa via
+// query.graph para precio/inventario reales, nunca confiamos en el
+// valor indexado (puede tener unos segundos de retraso respecto al
+// evento de sincronizacion).
+const PRODUCT_FIELDS = [
+  "id",
+  "handle",
+  "title",
+  "subtitle",
+  "description",
+  "thumbnail",
+  "external_id",
+  "metadata",
+  "images.url",
+  "tags.value",
+  "categories.name",
+  "collection.title",
+  "variants.id",
+  "variants.title",
+  "variants.sku",
+  "variants.manage_inventory",
+  "variants.allow_backorder",
+  "variants.inventory_quantity",
+  "variants.calculated_price.calculated_amount",
+  "variants.calculated_price.original_amount",
+  "variants.calculated_price.currency_code",
+  "variants.options.value",
+  "variants.options.option.title",
+];
+
+function stringParam(
+  query: MedusaRequest["query"],
+  name: string,
+): string | undefined {
+  const value = query[name];
+  return typeof value === "string" && value.length > 0 ? value : undefined;
+}
+
+function numberParam(
+  query: MedusaRequest["query"],
+  name: string,
+): number | undefined {
+  const value = stringParam(query, name);
+  if (!value) return undefined;
+  const parsed = Number(value);
+  return Number.isFinite(parsed) ? parsed : undefined;
+}
+
+// Meilisearch usa comillas dobles para valores de filtro con espacios;
+// escapamos las que vengan en el propio valor para no romper la sintaxis.
+function escapeFilterValue(value: string): string {
+  return value.replace(/\\/g, "\\\\").replace(/"/g, '\\"');
+}
+
+export async function GET(req: MedusaRequest, res: MedusaResponse) {
+  const meilisearchService = req.scope.resolve<MeiliSearchService>(
+    MEILISEARCH_MODULE,
+  );
+  const query = req.scope.resolve(ContainerRegistrationKeys.QUERY);
+
+  const q = stringParam(req.query, "q") ?? "";
+  const limit = numberParam(req.query, "limit") ?? 24;
+  const offset = numberParam(req.query, "offset") ?? 0;
+
+  const filterParts: string[] = [];
+  for (const facet of ["category", "collection", "brand", "ageRange"]) {
+    const value = stringParam(req.query, facet);
+    if (value) {
+      filterParts.push(`${facet} = "${escapeFilterValue(value)}"`);
+    }
+  }
+  const minPrice = numberParam(req.query, "minPrice");
+  const maxPrice = numberParam(req.query, "maxPrice");
+  if (typeof minPrice === "number") filterParts.push(`price >= ${minPrice}`);
+  if (typeof maxPrice === "number") filterParts.push(`price <= ${maxPrice}`);
+
+  const indexes = await meilisearchService.getIndexesByType("products");
+
+  if (indexes.length === 0) {
+    // Meilisearch no configurado o el indice "products" esta
+    // deshabilitado -- degradar a "sin resultados" en vez de 500, el
+    // frontend cae de nuevo a su propio filtrado si esta ruta falla.
+    res.json({ products: [], facetDistribution: {}, count: 0, limit, offset });
+    return;
+  }
+
+  const results = await Promise.all(
+    indexes.map((indexKey) =>
+      meilisearchService.search(indexKey, q, {
+        filter: filterParts.length ? filterParts.join(" AND ") : undefined,
+        paginationOptions: { limit, offset },
+        additionalOptions: { facets: FACETS },
+      }),
+    ),
+  );
+
+  const hits = results.flatMap((result) => result.hits);
+  const totalCount = results.reduce(
+    (sum, result) => sum + result.estimatedTotalHits,
+    0,
+  );
+
+  const facetDistribution: Record<string, Record<string, number>> = {};
+  for (const result of results) {
+    const resultFacets = (
+      result as unknown as {
+        facetDistribution?: Record<string, Record<string, number>>;
+      }
+    ).facetDistribution;
+    if (!resultFacets) continue;
+    for (const [facet, values] of Object.entries(resultFacets)) {
+      facetDistribution[facet] ??= {};
+      for (const [value, count] of Object.entries(values)) {
+        facetDistribution[facet][value] =
+          (facetDistribution[facet][value] ?? 0) + count;
+      }
+    }
+  }
+
+  const productIds = hits.map((hit) => (hit as { id: string }).id);
+
+  if (productIds.length === 0) {
+    res.json({ products: [], facetDistribution, count: 0, limit, offset });
+    return;
+  }
+
+  const { data: products = [] } = await query.graph({
+    entity: "product",
+    fields: PRODUCT_FIELDS,
+    filters: { id: productIds },
+  });
+
+  // Preserva el ranking de relevancia de Meilisearch -- query.graph no
+  // garantiza el mismo orden que la busqueda.
+  const orderedProducts = [...products].sort(
+    (a, b) => productIds.indexOf(a.id) - productIds.indexOf(b.id),
+  );
+
+  res.json({
+    products: orderedProducts,
+    facetDistribution,
+    count: totalCount,
+    limit,
+    offset,
+  });
+}