Андрей Смирнов ИТМО КТ stage6

src/main/java/ru/vk/itmo/test/smirnovandrew/ChunkTransformUtility.java

@@ -0,0 +1,35 @@
+package ru.vk.itmo.test.smirnovandrew;
+
+import ru.vk.itmo.dao.Entry;
+
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.ValueLayout;
+import java.nio.charset.StandardCharsets;
+
+public class ChunkTransformUtility {
+    private static final String CHUNK_SEPARATOR = "\r\n";
+    private static final String KEY_VALUE_SEPARATOR = "\n";
+    public static final byte[] EMPTY_CONTENT = "0\r\n\r\n".getBytes(StandardCharsets.UTF_8);
+    public static final byte[] HEADERS = """
+            HTTP/1.1 200 OK\r
+            Content-Type: text/plain\r
+            Transfer-Encoding: chunked\r
+            \r
+            """.getBytes(StandardCharsets.UTF_8);
+
+    private ChunkTransformUtility() {
+
+    }
+
+    public static byte[] makeContent(Entry<MemorySegment> entry) {
+        int entrySize = (int) (entry.key().byteSize() + entry.value().byteSize()) + KEY_VALUE_SEPARATOR.length();
+        String entrySizeHex = Long.toHexString(entrySize);
+        String content = entrySizeHex
+                + CHUNK_SEPARATOR
+                + new String(entry.key().toArray(ValueLayout.JAVA_BYTE), StandardCharsets.UTF_8)
+                + KEY_VALUE_SEPARATOR
+                + new String(entry.value().toArray(ValueLayout.JAVA_BYTE), StandardCharsets.UTF_8)
+                + CHUNK_SEPARATOR;
+        return content.getBytes(StandardCharsets.UTF_8);
+    }
+}