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resources/js/Composables/useAircraftFamilies.ts

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+import { computed, ComputedRef } from 'vue'
+import { Flight } from '@/Types/types'
+
+// ── Types ──────────────────────────────────────────────────────────────────
+
+export interface AircraftFamilyEntry {
+    family: string
+    designators: string[]
+    flights: Flight[]
+}
+
+// ── Composable ─────────────────────────────────────────────────────────────
+
+export function useAircraftFamilies(
+    flights: ComputedRef<Flight[]>,
+    families: Record<string, string[]>,
+) {
+    // Build a lookup from designator → family name for O(1) matching
+    const designatorToFamily = Object.entries(families).reduce<Record<string, string>>(
+        (acc, [family, designators]) => {
+            for (const d of designators) acc[d] = family
+            return acc
+        },
+        {}
+    )
+
+    const entries = computed<AircraftFamilyEntry[]>(() => {
+        // Pre-populate all families with empty flight lists
+        const map = new Map<string, AircraftFamilyEntry>(
+            Object.entries(families).map(([family, designators]) => [
+                family,
+                { family, designators, flights: [] },
+            ])
+        )
+
+        for (const flight of flights.value) {
+            const designator = flight.aircraft?.designator
+            if (!designator) continue
+            const family = designatorToFamily[designator]
+            if (!family) continue
+            map.get(family)!.flights.push(flight)
+        }
+
+        return [...map.values()]
+    })
+
+    const completedCount = computed(() => entries.value.filter(e => e.flights.length > 0).length)
+    const totalCount = computed(() => entries.value.length)
+
+    return { entries, completedCount, totalCount }
+}