dsfsdfs

src/lib/utils.ts

@@ -4,4 +4,47 @@ import { twMerge } from "tailwind-merge";
 
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs));
+}
+export function debounce<Func extends (...args: any[]) => any>(func: Func, wait: number): Func {
+  let timeout: ReturnType<typeof setTimeout> | null;
+  return function(this: any, ...args: any[]) {
+    if (timeout) clearTimeout(timeout);
+    timeout = setTimeout(() => {
+      func.apply(this, args);
+    }, wait);
+  } as Func;
+}
+type AspectInfo = {
+  width: number;
+  height: number;
+  ratio: string;     // ví dụ: "16:9"
+  float: number;     // ví dụ: 1.777...
+};
+
+function gcd(a: number, b: number): number {
+  return b === 0 ? a : gcd(b, a % b);
+}
+
+export function getImageAspectRatio(url: string): Promise<AspectInfo> {
+  return new Promise((resolve, reject) => {
+    const img = new Image();
+
+    img.onload = () => {
+      const w = img.naturalWidth;
+      const h = img.naturalHeight;
+
+      const g = gcd(w, h);
+
+      resolve({
+        width: w,
+        height: h,
+        ratio: `${w / g}:${h / g}`,
+        float: w / h
+      });
+    };
+
+    img.onerror = () => reject(new Error("Cannot load image"));
+
+    img.src = url;
+  });
 }