allow cloning EntryIterator objects at the current position

package.json

@@ -1,6 +1,6 @@
 {
   "name": "armarius",
-  "version": "1.4.4",
+  "version": "1.5.0",
   "description": "A JavaScript library to read, write, and merge ZIP archives in web browsers.",
   "repository": "github:aternosorg/armarius",
   "type": "module",

src/Archive/Entry/EntryIterator.js

@@ -33,6 +33,15 @@ export default class EntryIterator {
         this.currentEntry = BigInt(0);
     }
 
+    /**
+     * @return {Promise<EntryIterator>}
+     */
+    async clone() {
+        let cloneReader = await this.reader.clone();
+        cloneReader.seek(this.reader.offset);
+        return new this.constructor(this.archive, cloneReader, false);
+    }
+
     /**
      * @returns {Promise<?ArchiveEntry>}
      */

test/archive.test.js

@@ -158,3 +158,28 @@ test('Merge archives', async () => {
     expect(entries.find(e => e.fileNameString === 'file1.txt')).toBeInstanceOf(ArchiveEntry);
     expect(entries.find(e => e.fileNameString === 'file2.txt')).toBeInstanceOf(ArchiveEntry);
 });
+
+test('Clone entry iterator', async () => {
+    let i = 0;
+    let fileName = 'file.txt';
+    let fileComment = 'file-comment';
+    let archive = new WriteArchive(() => {
+        if(i >= 2) {
+            return null;
+        }
+        i++;
+        return new DataReaderEntrySource(new ArrayBufferReader(encoder.encode(`file-content-${i}`).buffer), {
+            fileName: `file-${i}.txt`,
+        });
+    });
+    let data = await writeArchiveToBuffer(archive);
+
+    let readArchive = new ReadArchive(new ArrayBufferReader(data.buffer, data.byteOffset, data.byteLength));
+    await readArchive.init();
+
+    let entryIterator = await readArchive.getEntryIterator();
+    expect((await entryIterator.next()).getFileNameString()).toBe('file-1.txt');
+
+    let clone = await entryIterator.clone();
+    expect((await entryIterator.next()).getFileNameString()).toBe((await clone.next()).getFileNameString());
+});