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apps/web/src/lib/services/action-events.ts

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+import { db, actionEvents } from "../db";
+import { eq, desc, and, isNull, lt, sql } from "drizzle-orm";
+
+export interface RecordActionInput {
+  userId: string;
+  actionType: string;
+  entityType: string;
+  entityId: string;
+  summary: string;
+  beforeState: Record<string, unknown>;
+  afterState: Record<string, unknown>;
+  inversePatch?: Record<string, unknown>;
+  metadata?: Record<string, unknown>;
+  undoable?: boolean;
+}
+
+export async function recordAction(input: RecordActionInput) {
+  const [event] = await db
+    .insert(actionEvents)
+    .values({
+      userId: input.userId,
+      actionType: input.actionType,
+      entityType: input.entityType,
+      entityId: input.entityId,
+      summary: input.summary,
+      beforeState: input.beforeState,
+      afterState: input.afterState,
+      inversePatch: input.inversePatch,
+      metadata: input.metadata ?? {},
+      undoable: input.undoable ?? true,
+    })
+    .returning();
+  return event;
+}
+
+export async function getRecentActions(userId: string, limit = 20) {
+  return db
+    .select()
+    .from(actionEvents)
+    .where(and(eq(actionEvents.userId, userId), isNull(actionEvents.undoneAt)))
+    .orderBy(desc(actionEvents.createdAt))
+    .limit(limit);
+}
+
+export async function getActionEvent(userId: string, actionEventId: string) {
+  const [event] = await db
+    .select()
+    .from(actionEvents)
+    .where(
+      and(eq(actionEvents.id, actionEventId), eq(actionEvents.userId, userId))
+    );
+  return event ?? null;
+}
+
+export async function markUndone(actionEventId: string) {
+  await db
+    .update(actionEvents)
+    .set({ undoneAt: new Date() })
+    .where(eq(actionEvents.id, actionEventId));
+}
+
+export async function pruneOldActions(userId: string, daysOld = 90) {
+  const cutoff = new Date();
+  cutoff.setDate(cutoff.getDate() - daysOld);
+  await db
+    .delete(actionEvents)
+    .where(
+      and(
+        eq(actionEvents.userId, userId),
+        lt(actionEvents.createdAt, cutoff)
+      )
+    );
+}