fix: clear codacy high severity batches

src/utils/dateStringParts.ts

@@ -0,0 +1,73 @@
+export interface DateParts {
+  year: number
+  month: number
+  day: number
+}
+
+export function parseDashDateParts(value: string): DateParts | null {
+  const [datePart, timePart] = value.split('T', 2)
+  if (timePart !== undefined && !isClockPrefix(timePart)) return null
+  const parts = datePart.split('-')
+  if (parts.length !== 3) return null
+  if (!matchesLength(parts[0], 4)) return null
+  if (!matchesLength(parts[1], 2)) return null
+  if (!matchesLength(parts[2], 2)) return null
+  if (!parts.every(isDigits)) return null
+  return validDateParts({
+    year: Number(parts[0]),
+    month: Number(parts[1]),
+    day: Number(parts[2]),
+  })
+}
+
+export function parseSlashDateParts(value: string): DateParts | null {
+  return parseDateTuple(value, '/', [undefined, undefined, [2, 4]])
+}
+
+export function dateFromParts(parts: DateParts): Date {
+  return new Date(parts.year, parts.month - 1, parts.day)
+}
+
+function parseDateTuple(
+  value: string,
+  separator: string,
+  lengths: readonly [number | undefined, number | undefined, number | readonly number[]],
+): DateParts | null {
+  const parts = value.split(separator)
+  if (parts.length !== 3) return null
+  if (!matchesLength(parts[0], lengths[0])) return null
+  if (!matchesLength(parts[1], lengths[1])) return null
+  if (!matchesLength(parts[2], lengths[2])) return null
+  if (!parts.every(isDigits)) return null
+  return validDateParts({
+    year: Number(parts[2].length === 2 ? `20${parts[2]}` : parts[2]),
+    month: Number(parts[0]),
+    day: Number(parts[1]),
+  })
+}
+
+function matchesLength(value: string, length: number | readonly number[] | undefined): boolean {
+  if (length === undefined) return value.length > 0
+  if (typeof length === 'number') return value.length === length
+  return length.includes(value.length)
+}
+
+function isDigits(value: string): boolean {
+  return value.length > 0 && [...value].every((char) => char >= '0' && char <= '9')
+}
+
+function isClockPrefix(value: string): boolean {
+  const parts = value.split(':')
+  return (parts.length === 2 || parts.length === 3)
+    && matchesLength(parts[0], 2)
+    && matchesLength(parts[1], 2)
+    && (parts.length === 2 || matchesLength(parts[2], 2))
+    && parts.every(isDigits)
+}
+
+function validDateParts(parts: DateParts): DateParts | null {
+  const date = dateFromParts(parts)
+  return date.getFullYear() === parts.year && date.getMonth() === parts.month - 1 && date.getDate() === parts.day
+    ? parts
+    : null
+}