fix(viewer): stack levels per building (#519)

* fix(viewer): stack levels per building * fix(viewer): recover legacy level ownership
2026-07-19 18:29:00 +02:00
parent 87f3952e4d
commit 494150dc1f
4 changed files with 155 additions and 26 deletions
@@ -0,0 +1,32 @@
+export type LevelStackEntry = {
+  levelId: string
+  buildingId: string | null
+  index: number
+  height: number
+}
+
+type BuildingOwnership = { id: string; children: readonly string[] }
+
+export function getLevelBuildingId(
+  levelId: string,
+  parentId: string | null,
+  buildings: readonly BuildingOwnership[],
+): string | null {
+  const directParent = parentId ? buildings.find((building) => building.id === parentId) : undefined
+  if (directParent) return directParent.id
+
+  return buildings.find((building) => building.children.includes(levelId))?.id ?? null
+}
+
+export function getLevelStackPositions(entries: readonly LevelStackEntry[]): Map<string, number> {
+  const positions = new Map<string, number>()
+  const cumulativeYByBuilding = new Map<string | null, number>()
+
+  for (const entry of [...entries].sort((a, b) => a.index - b.index)) {
+    const baseY = cumulativeYByBuilding.get(entry.buildingId) ?? 0
+    positions.set(entry.levelId, baseY)
+    cumulativeYByBuilding.set(entry.buildingId, baseY + entry.height)
+  }
+
+  return positions
+}