BREAKING CHANGE(core): update

ts/classes.gziptools.ts

@@ -0,0 +1,59 @@
+import type { SmartArchive } from './classes.smartarchive.js';
+import * as plugins from './plugins.js'
+
+// This class wraps fflate's gunzip in a Node.js Transform stream
+export class CompressGunzipTransform extends plugins.stream.Transform {
+  constructor() {
+    super();
+  }
+
+  _transform(chunk: Buffer, encoding: BufferEncoding, callback: plugins.stream.TransformCallback) {
+    plugins.fflate.gunzip(chunk, (err, decompressed) => {
+      if (err) {
+        callback(err);
+      } else {
+        this.push(decompressed);
+        callback();
+      }
+    });
+  }
+}
+
+// DecompressGunzipTransform class that extends the Node.js Transform stream to
+// create a stream that decompresses GZip-compressed data using fflate's gunzip function
+export class DecompressGunzipTransform extends plugins.stream.Transform {
+  constructor() {
+    super();
+  }
+
+  _transform(chunk: Buffer, encoding: BufferEncoding, callback: plugins.stream.TransformCallback) {
+    // Use fflate's gunzip function to decompress the chunk
+    plugins.fflate.gunzip(chunk, (err, decompressed) => {
+      if (err) {
+        // If an error occurs during decompression, pass the error to the callback
+        callback(err);
+      } else {
+        // If decompression is successful, push the decompressed data into the stream
+        this.push(decompressed);
+        callback();
+      }
+    });
+  }
+}
+
+
+export class GzipTools {
+  smartArchiveRef: SmartArchive;
+
+  constructor(smartArchiveRefArg: SmartArchive) {
+    this.smartArchiveRef = smartArchiveRefArg;
+  }
+
+  public getCompressionStream() {
+    return new CompressGunzipTransform();
+  }
+
+  public getDecompressionStream() {
+    return new DecompressGunzipTransform();
+  }
+}