Fas 2 steg 2: Inventory Trust Engine - decay-profiler och cache-jobb

apps/worker/src/processors/maintenance.ts

@@ -1,6 +1,6 @@
 import { and, eq, gt, inArray, isNull, lte, sql } from "drizzle-orm";
 import { schema } from "@app/database";
-import { classifyExpiry } from "@app/inventory-engine";
+import { classifyExpiry, computeTrust } from "@app/inventory-engine";
 import { deriveMemoryUpdates } from "@app/memory-client";
 import { getLocaleContext } from "../locale.js";
 import type { WorkerContext } from "../context.js";
@@ -31,6 +31,58 @@ export async function processOutbox(ctx: WorkerContext): Promise<number> {
   return pending.length;
 }
 
+/**
+ * UPDATE_TRUST_STATES (Fas 2 §5.2): uppdatera cache-kolumnen inventory_items.trust_state
+ * utifrån aktiv decay-profil. Körs periodiskt. Decay påverkar endast förtroende,
+ * aldrig ätbarhet (mjölkprincipen D-035).
+ */
+export async function processTrustDecay(ctx: WorkerContext): Promise<number> {
+  const [profile] = await ctx.db
+    .select({
+      halfLifeDays: schema.inventoryDecayProfiles.halfLifeDays,
+      staleAfterDays: schema.inventoryDecayProfiles.staleAfterDays,
+    })
+    .from(schema.inventoryDecayProfiles)
+    .where(eq(schema.inventoryDecayProfiles.active, true))
+    .orderBy(schema.inventoryDecayProfiles.createdAt)
+    .limit(1);
+
+  const decayProfile = {
+    halfLifeDays: profile?.halfLifeDays ?? 7,
+    staleAfterDays: profile?.staleAfterDays ?? 30,
+  };
+
+  const now = new Date();
+  const rows = await ctx.db
+    .select()
+    .from(schema.inventoryItems)
+    .where(and(isNull(schema.inventoryItems.depletedAt), gt(schema.inventoryItems.quantity, 0)))
+    .limit(500);
+
+  let updated = 0;
+  for (const item of rows) {
+    const { state } = computeTrust(
+      {
+        confidence: item.confidence,
+        verifiedByUser: item.verifiedByUser,
+        lastVerifiedAt: item.lastVerifiedAt,
+        quantity: item.quantity,
+        updatedAt: item.updatedAt,
+      },
+      now,
+      decayProfile,
+    );
+    if (state !== item.trustState) {
+      await ctx.db
+        .update(schema.inventoryItems)
+        .set({ trustState: state, updatedAt: now })
+        .where(eq(schema.inventoryItems.id, item.id));
+      updated++;
+    }
+  }
+  return updated;
+}
+
 /** SEND_EXPIRY_NOTIFICATION (spec §54): skapa notiser för varor som snart går ut. */
 export async function processExpiryNotifications(ctx: WorkerContext): Promise<number> {
   const households = await ctx.db.select({ id: schema.households.id }).from(schema.households);