Init

src/utils.ts

@@ -0,0 +1,35 @@
+import { PhotoAttachment } from "vk-io";
+
+export const SMALL_SIZES = ['m', 's'];
+export const MEDIUM_SIZES = ['y', 'r', 'q', 'p', ...SMALL_SIZES];
+export const LARGE_SIZES = ['w', 'z', ...MEDIUM_SIZES];
+
+export async function fetchImage(url: string, params?: RequestInit) {
+    const image = await fetch(url, params)
+        .then(r => r.arrayBuffer());
+    const imageBuffer = Buffer.from(image);
+    return imageBuffer;
+}
+
+/**
+ * Example:
+ * ```js
+ * const SMALL_SIZES = ['m', 's'];
+ * const MEDIUM_SIZES = ['y', 'r', 'q', 'p', ...SMALL_SIZES];
+ * const LARGE_SIZES = ['w', 'z', ...MEDIUM_SIZES];
+ * 
+ * const [size] = getAttachmentBySizes(attachment, LARGE_SIZES);
+ * console.log(size)
+ * ```
+ */
+export function getAttachmentBySizes(photoAttachment: PhotoAttachment, sizeTypes: string[] = []) {
+    const { sizes } = photoAttachment;
+
+    if (!sizes) return [];
+
+    return sizeTypes
+        .map((sizeType) => (
+            sizes.find((size) => size.type === sizeType)
+        ))
+        .filter(Boolean);
+}