1 files changed, 103 insertions, 0 deletions
diff --git a/archive/2025/summer/bsc_karidas/src/Writer.cpp b/archive/2025/summer/bsc_karidas/src/Writer.cpp
new file mode 100644
index 000000000..bc3fe9acd
--- /dev/null
+++ b/archive/2025/summer/bsc_karidas/src/Writer.cpp
@@ -0,0 +1,103 @@
+#include "Writer.hpp"
+#include "Crypto.hpp"
+#include "Compression.hpp"
+#include <iostream>
+#include <chrono>
+#include <map>
+
+Writer::Writer(BufferQueue &queue,
+               std::shared_ptr<SegmentedStorage> storage,
+               size_t batchSize,
+               bool useEncryption,
+               int compressionLevel)
+    : m_queue(queue),
+      m_storage(std::move(storage)),
+      m_batchSize(batchSize),
+      m_useEncryption(useEncryption),
+      m_compressionLevel(compressionLevel),
+      m_consumerToken(queue.createConsumerToken())
+{
+}
+
+Writer::~Writer()
+{
+    stop();
+}
+
+void Writer::start()
+{
+    if (m_running.exchange(true))
+    {
+        return;
+    }
+
+    m_writerThread.reset(new std::thread(&Writer::processLogEntries, this));
+}
+
+void Writer::stop()
+{
+    if (m_running.exchange(false))
+    {
+        if (m_writerThread && m_writerThread->joinable())
+        {
+            m_writerThread->join();
+        }
+    }
+}
+
+bool Writer::isRunning() const
+{
+    return m_running.load();
+}
+
+void Writer::processLogEntries()
+{
+    std::vector<QueueItem> batch;
+
+    Crypto crypto;
+    std::vector<uint8_t> encryptionKey(crypto.KEY_SIZE, 0x42); // dummy key
+    std::vector<uint8_t> dummyIV(crypto.GCM_IV_SIZE, 0x24);    // dummy IV
+
+    while (m_running)
+    {
+        size_t entriesDequeued = m_queue.tryDequeueBatch(batch, m_batchSize, m_consumerToken);
+        if (entriesDequeued == 0)
+        {
+            std::this_thread::sleep_for(std::chrono::milliseconds(5));
+            continue;
+        }
+
+        std::map<std::optional<std::string>, std::vector<LogEntry>> groupedEntries;
+        for (auto &item : batch)
+        {
+            groupedEntries[item.targetFilename].emplace_back(std::move(item.entry));
+        }
+
+        for (auto &[targetFilename, entries] : groupedEntries)
+        {
+            std::vector<uint8_t> processedData = LogEntry::serializeBatch(std::move(entries));
+
+            // Apply compression if enabled
+            if (m_compressionLevel > 0)
+            {
+                processedData = Compression::compress(std::move(processedData), m_compressionLevel);
+            }
+            // Apply encryption if enabled
+            if (m_useEncryption)
+            {
+                processedData = crypto.encrypt(std::move(processedData), encryptionKey, dummyIV);
+            }
+
+            if (targetFilename)
+            {
+                m_storage->writeToFile(*targetFilename, std::move(processedData));
+            }
+            else
+            {
+                m_storage->write(std::move(processedData));
+            }
+        }
+
+        batch.clear();
+    }
+}
\ No newline at end of file