refactor: migrate to nuxt compatibilityVersion: 4 (#3298)

app/composables/misc.ts

@@ -0,0 +1,42 @@
+import type { mastodon } from 'masto'
+
+export const UserLinkRE = /^(?:https:\/)?\/([^/]+)\/@([^/]+)$/
+export const TagLinkRE = /^https?:\/\/([^/]+)\/tags\/([^/]+)\/?$/
+export const HTMLTagRE = /<[^>]+>/g
+
+export function getDataUrlFromArr(arr: Uint8ClampedArray, w: number, h: number) {
+  if (typeof w === 'undefined' || typeof h === 'undefined')
+    w = h = Math.sqrt(arr.length / 4)
+
+  const canvas = document.createElement('canvas')
+  const ctx = canvas.getContext('2d')!
+
+  canvas.width = w
+  canvas.height = h
+
+  const imgData = ctx.createImageData(w, h)
+  imgData.data.set(arr)
+  ctx.putImageData(imgData, 0, 0)
+
+  return canvas.toDataURL()
+}
+
+export function emojisArrayToObject(emojis: mastodon.v1.CustomEmoji[]) {
+  return Object.fromEntries(emojis.map(i => [i.shortcode, i]))
+}
+
+export function noop() {}
+
+export function useIsMac() {
+  const headers = useRequestHeaders(['user-agent'])
+  return computed(() => headers['user-agent']?.includes('Macintosh')
+    ?? navigator?.userAgent?.includes('Mac') ?? false)
+}
+
+export function isEmptyObject(object: object) {
+  return Object.keys(object).length === 0
+}
+
+export function removeHTMLTags(str: string) {
+  return str.replaceAll(HTMLTagRE, '')
+}