fix(map): make area analysis scale-aware

frontend/src/hooks/useOfficialMapProducts.ts

@@ -3,11 +3,13 @@ import { datasetsApi, externalApi } from '../services/api'
 import { formatError } from '../lib/formatError'
 import type {
   BathymetrySourceRead,
+  CoverageResolveResponse,
   DhmvProductRead,
   FloodHazardProductRead,
   GrbProductRead,
   OfficialVectorProductRead,
   ThematicRasterProductRead,
+  VectorSelectionBBox,
 } from '../types'
 
 export interface OfficialMapProducts {
@@ -104,5 +106,47 @@ export function useOfficialMapProducts(selectedProjectId: string | null) {
     [selectedProjectId],
   )
 
-  return { products, loading, error, resolveCoverage }
+  const resolveCoveragePartitions = useCallback(
+    async (bboxes: VectorSelectionBBox[]): Promise<Array<{
+      bbox: VectorSelectionBBox
+      coverage: CoverageResolveResponse
+    }> | null> => {
+      if (!selectedProjectId) {
+        setError('Selecteer eerst een werkruimte.')
+        return null
+      }
+      try {
+        const resolved: Array<{
+          bbox: VectorSelectionBBox
+          coverage: CoverageResolveResponse
+        }> = []
+        for (let offset = 0; offset < bboxes.length; offset += 4) {
+          const batch = bboxes.slice(offset, offset + 4)
+          resolved.push(...await Promise.all(batch.map(async (bbox) => ({
+            bbox,
+            coverage: await externalApi.resolveCoverage({
+              projectId: selectedProjectId,
+              bbox: {
+                minx: bbox.min_x,
+                miny: bbox.min_y,
+                maxx: bbox.max_x,
+                maxy: bbox.max_y,
+              },
+            }),
+          }))))
+        }
+        setError(null)
+        return resolved
+      } catch (requestError) {
+        setError(formatError(
+          requestError,
+          'De regionale dekking kon niet voor alle bronpartities worden bepaald.',
+        ))
+        return null
+      }
+    },
+    [selectedProjectId],
+  )
+
+  return { products, loading, error, resolveCoverage, resolveCoveragePartitions }
 }