fix(map): honor raster coverage and temporal dates

frontend/src/components/map/mapWorkspaceUtils.ts

@@ -117,6 +117,49 @@ export function persistedDatasetSupportsSelection(
   return scale === 'detail'
 }
 
+export function datasetIntersectsSelection(
+  dataset: { source_metadata?: Record<string, unknown> | null },
+  bbox: VectorSelectionBBox,
+): boolean {
+  const bounds = dataset.source_metadata?.['bbox_epsg4326']
+  if (!Array.isArray(bounds) || bounds.length !== 4) {
+    return true
+  }
+  const [minX, minY, maxX, maxY] = bounds.map(Number)
+  if (![minX, minY, maxX, maxY].every(Number.isFinite)) {
+    return true
+  }
+  return !(
+    bbox.max_x < minX
+    || bbox.min_x > maxX
+    || bbox.max_y < minY
+    || bbox.min_y > maxY
+  )
+}
+
+export function deduplicateTemporalSnapshots<
+  T extends {
+    id: string
+    observed_at?: string | null
+    imported_at?: string | null
+    created_at?: string | null
+  },
+>(datasets: T[]): T[] {
+  const byObservation = new Map<string, T>()
+  for (const dataset of datasets) {
+    if (!dataset.observed_at) continue
+    const current = byObservation.get(dataset.observed_at)
+    const recency = new Date(dataset.imported_at ?? dataset.created_at ?? 0).getTime()
+    const currentRecency = new Date(current?.imported_at ?? current?.created_at ?? 0).getTime()
+    if (!current || recency > currentRecency || (recency === currentRecency && dataset.id > current.id)) {
+      byObservation.set(dataset.observed_at, dataset)
+    }
+  }
+  return Array.from(byObservation.values()).sort(
+    (left, right) => new Date(left.observed_at ?? 0).getTime() - new Date(right.observed_at ?? 0).getTime(),
+  )
+}
+
 export function selectionFeatureLimit(bbox: VectorSelectionBBox): number {
   const scale = selectionAnalysisScale(bbox)
   if (scale === 'overview') return 25