Persist section renumbering

src/frontend/utils/circuit-section-renumber-command.ts

@@ -0,0 +1,54 @@
+import type {
+  CircuitSectionRenumberAssignment,
+} from "../../domain/models/circuit-section-renumber-project-command.model.js";
+import type { CircuitTreeSectionDto } from "../types.js";
+
+export function buildCircuitSectionRenumberAssignments(
+  sections: CircuitTreeSectionDto[],
+  sectionId: string
+): CircuitSectionRenumberAssignment[] {
+  const targetSection = sections.find(
+    (section) => section.id === sectionId
+  );
+  if (!targetSection) {
+    throw new Error("Der Bereich wurde nicht gefunden.");
+  }
+
+  const identifiersOutsideSection = new Set(
+    sections
+      .filter((section) => section.id !== sectionId)
+      .flatMap((section) =>
+        section.circuits.map(
+          (circuit) => circuit.equipmentIdentifier
+        )
+      )
+  );
+  const assignments: CircuitSectionRenumberAssignment[] = [];
+  let suffix = 1;
+  for (const circuit of targetSection.circuits) {
+    let targetEquipmentIdentifier = `${targetSection.prefix}${suffix}`;
+    while (
+      identifiersOutsideSection.has(targetEquipmentIdentifier)
+    ) {
+      suffix += 1;
+      targetEquipmentIdentifier = `${targetSection.prefix}${suffix}`;
+    }
+    assignments.push({
+      circuitId: circuit.id,
+      expectedEquipmentIdentifier: circuit.equipmentIdentifier,
+      targetEquipmentIdentifier,
+    });
+    suffix += 1;
+  }
+
+  if (
+    assignments.every(
+      (assignment) =>
+        assignment.expectedEquipmentIdentifier ===
+        assignment.targetEquipmentIdentifier
+    )
+  ) {
+    return [];
+  }
+  return assignments;
+}