dates

lib/serper-date-filters.ts

@@ -0,0 +1,28 @@
+export type SerperAgeFilter = {
+  maxAgeDays?: number
+  minAgeDays?: number
+}
+
+const normalizeDays = (value?: number) => {
+  if (typeof value !== 'number') return undefined
+  if (!Number.isFinite(value)) return undefined
+  if (value <= 0) return undefined
+  return Math.floor(value)
+}
+
+export function appendSerperAgeModifiers(query: string, filters?: SerperAgeFilter): string {
+  if (!filters) return query
+  const modifiers: string[] = []
+  const normalizedMax = normalizeDays(filters.maxAgeDays)
+  const normalizedMin = normalizeDays(filters.minAgeDays)
+
+  if (typeof normalizedMax === 'number') {
+    modifiers.push(`newer_than:${normalizedMax}d`)
+  }
+  if (typeof normalizedMin === 'number') {
+    modifiers.push(`older_than:${normalizedMin}d`)
+  }
+
+  if (modifiers.length === 0) return query
+  return `${query} ${modifiers.join(' ')}`
+}