[feat] compressed data for local

src/ts/exif.ts

@@ -20,6 +20,23 @@ export const PngMetadata = {
         const encoded = encode(chunks);
         return encoded
     },
+    writeStream:(pngBuffer: Uint8Array, metadata: Record<string, string>): Buffer => {
+        let chunks:{
+            name:string
+            data:Uint8Array
+        }[] = extract(Buffer.from(pngBuffer));
+
+        chunks = chunks.filter((v) => {
+            return v.name.toLocaleLowerCase() !== 'text'
+        })
+
+        for (const key in metadata) {
+            const value = metadata[key];
+            chunks.splice(-1, 0, textKey.encode(key, value))
+        }
+        const encoded = encode(chunks);
+        return encoded
+    },
     filter: (pngBuffer: Uint8Array) => {
         let chunks:{
             name:string