Merge pull request #1395 from crupest/dev

Refector 2023 v0.1

1 files changed, 41 insertions, 0 deletions

diff --git a/FrontEnd/src/components/BlobImage.tsx b/FrontEnd/src/components/BlobImage.tsx
new file mode 100644
index 00000000..047a13b4
--- /dev/null
+++ b/FrontEnd/src/components/BlobImage.tsx
@@ -0,0 +1,41 @@
+import {
+  useState,
+  useEffect,
+  useMemo,
+  Ref,
+  ComponentPropsWithoutRef,
+} from "react";
+
+type BlobImageProps = Omit<ComponentPropsWithoutRef<"img">, "src"> & {
+  imgRef?: Ref<HTMLImageElement>;
+  src?: Blob | string | null;
+  keyBySrc?: boolean;
+};
+
+export default function BlobImage(props: BlobImageProps) {
+  const { imgRef, src, keyBySrc, ...otherProps } = props;
+
+  const [url, setUrl] = useState<string | null | undefined>(undefined);
+
+  useEffect(() => {
+    if (src instanceof Blob) {
+      const url = URL.createObjectURL(src);
+      setUrl(url);
+      return () => {
+        URL.revokeObjectURL(url);
+      };
+    } else {
+      setUrl(src);
+    }
+  }, [src]);
+
+  const key = useMemo(() => {
+    if (keyBySrc) {
+      return url == null ? undefined : btoa(url);
+    } else {
+      return undefined;
+    }
+  }, [url, keyBySrc]);
+
+  return <img key={key} ref={imgRef} {...otherProps} src={url ?? undefined} />;
+}