refactor(core): CORE-01 migrate utility contracts to TypeScript

packages/artplayer/src/utils/format.ts

@@ -0,0 +1,44 @@
+export function clamp(num: number, a: number, b: number): number {
+  return Math.max(Math.min(num, Math.max(a, b)), Math.min(a, b))
+}
+
+export function capitalize(str: string): string {
+  return str.charAt(0).toUpperCase() + str.slice(1)
+}
+
+export function secondToTime(second: number): string {
+  if (!second)
+    return '00:00'
+  const add0 = (num: number) => (num < 10 ? `0${num}` : String(num))
+  const hour = Math.floor(second / 3600)
+  const min = Math.floor((second - hour * 3600) / 60)
+  const sec = Math.floor(second - hour * 3600 - min * 60)
+  return (hour > 0 ? [hour, min, sec] : [min, sec]).map(add0).join(':')
+}
+
+const escapeMap: Record<string, string> = {
+  '&': '&amp;',
+  '<': '&lt;',
+  '>': '&gt;',
+  '\'': '&#39;',
+  '"': '&quot;',
+}
+const unescapeMap: Record<string, string> = {
+  '&amp;': '&',
+  '&lt;': '<',
+  '&gt;': '>',
+  '&#39;': '\'',
+  '&quot;': '"',
+}
+const unescapePattern = /(&amp;|&lt;|&gt;|&#39;|&quot;)/g
+
+export function escape(str: string): string {
+  return str.replace(
+    /[&<>'"]/g,
+    tag => escapeMap[tag] || tag,
+  )
+}
+
+export function unescape(str: string): string {
+  return str.replace(unescapePattern, tag => unescapeMap[tag] || tag)
+}