Phase 1A done

src/db/repositories/circuit-section.repository.ts

@@ -0,0 +1,42 @@
+import crypto from "node:crypto";
+import { and, asc, eq } from "drizzle-orm";
+import { db } from "../client.js";
+import { circuitSections } from "../schema/circuit-sections.js";
+
+export class CircuitSectionRepository {
+  async listByCircuitList(circuitListId: string) {
+    return db
+      .select()
+      .from(circuitSections)
+      .where(eq(circuitSections.circuitListId, circuitListId))
+      .orderBy(asc(circuitSections.sortOrder));
+  }
+
+  async createDefaults(circuitListId: string) {
+    const defaults = [
+      { key: "lighting", displayName: "Lighting", prefix: "-1F", sortOrder: 10 },
+      { key: "single_phase", displayName: "Single-phase circuits", prefix: "-2F", sortOrder: 20 },
+      { key: "three_phase", displayName: "Three-phase circuits", prefix: "-3F", sortOrder: 30 },
+      { key: "unassigned", displayName: "Unassigned", prefix: "-UF", sortOrder: 90 },
+    ];
+
+    for (const entry of defaults) {
+      const existing = await db
+        .select({ id: circuitSections.id })
+        .from(circuitSections)
+        .where(
+          and(eq(circuitSections.circuitListId, circuitListId), eq(circuitSections.key, entry.key))
+        )
+        .limit(1);
+      if (existing.length) {
+        continue;
+      }
+      await db.insert(circuitSections).values({
+        id: crypto.randomUUID(),
+        circuitListId,
+        ...entry,
+      });
+    }
+  }
+}
+