Add commissions

src/utils/calculatePrice.ts

@@ -0,0 +1,48 @@
+type PriceSource = {
+  price?: number | null
+  pricePercent?: number | null
+  priceRange?: string | null
+}
+
+export function calculatePrice(source: PriceSource, base: number): number {
+  if (source.price != null) return source.price
+  if (source.pricePercent != null) return base * (source.pricePercent / 100)
+  if (source.priceRange) {
+    const parts = source.priceRange.split("–").map(Number)
+    const max = Math.max(...parts)
+    return isNaN(max) ? 0 : max
+  }
+  return 0
+}
+
+export function calculatePriceRange(
+  baseSource: PriceSource | undefined,
+  extras: PriceSource[]
+): [number, number] {
+  if (!baseSource) return [0, 0]
+
+  const base = calculatePrice(baseSource, 0)
+
+  let minExtra = 0
+  let maxExtra = 0
+
+  for (const extra of extras) {
+    if (extra.price != null) {
+      minExtra += extra.price
+      maxExtra += extra.price
+    } else if (extra.pricePercent != null) {
+      const val = base * (extra.pricePercent / 100)
+      minExtra += val
+      maxExtra += val
+    } else if (extra.priceRange) {
+      const [minStr, maxStr] = extra.priceRange.split("–")
+      const min = Number(minStr)
+      const max = Number(maxStr)
+
+      if (!isNaN(min)) minExtra += min
+      if (!isNaN(max)) maxExtra += max
+    }
+  }
+
+  return [base + minExtra, base + maxExtra]
+}