From 9302481d937dd275f047b4e716f2cf6960816dc5 Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Fri, 28 Dec 2018 01:48:21 +0300
Subject: [PATCH] Set download offset for encrypted files.

GitOrigin-RevId: 505d464839bc33e6a969b24dcaddab34863c5f7c
---
 td/telegram/files/FileLoaderUtils.cpp |  1 +
 td/telegram/files/FileManager.cpp     | 15 ++++-----------
 2 files changed, 5 insertions(+), 11 deletions(-)

diff --git a/td/telegram/files/FileLoaderUtils.cpp b/td/telegram/files/FileLoaderUtils.cpp
index 87cd30a76..61ebed99d 100644
--- a/td/telegram/files/FileLoaderUtils.cpp
+++ b/td/telegram/files/FileLoaderUtils.cpp
@@ -76,6 +76,7 @@ bool for_suggested_file_name(CSlice name, bool use_pmc, bool use_random, F &&cal
     if (r_path.is_error()) {
       return true;
     }
+    LOG(DEBUG) << "Trying " << r_path.ok();
     return callback(r_path.move_as_ok());
   };
   auto cleaned_name = clean_filename(name);
diff --git a/td/telegram/files/FileManager.cpp b/td/telegram/files/FileManager.cpp
index e96340f5e..12fef9cc4 100644
--- a/td/telegram/files/FileManager.cpp
+++ b/td/telegram/files/FileManager.cpp
@@ -1607,10 +1607,6 @@ void FileManager::download(FileId file_id, std::shared_ptr<DownloadCallback> cal
   }
 
   LOG(INFO) << "Change download priority of file " << file_id << " to " << new_priority;
-  if (file_view.is_encrypted_any()) {
-    // TODO: we need to set offset always and just download from the beginning
-    offset = 0;
-  }
   node->set_download_offset(offset);
   auto *file_info = get_file_id_info(file_id);
   CHECK(new_priority == 0 || callback);
@@ -1630,9 +1626,6 @@ void FileManager::download_set_offset(FileId file_id, int64 offset) {
     LOG(INFO) << "File " << file_id << " not found";
     return;
   }
-  if (FileView(file_node).is_encrypted_any()) {
-    offset = 0;
-  }
   file_node->set_download_offset(offset);
   run_generate(file_node);
   run_download(file_node);
@@ -1674,8 +1667,8 @@ void FileManager::run_download(FileNodePtr node) {
     CHECK(node->download_id_ != 0);
     send_closure(file_load_manager_, &FileLoadManager::update_priority, node->download_id_, priority);
     if (need_update_offset) {
-      send_closure(file_load_manager_, &FileLoadManager::update_download_offset, node->download_id_,
-                   node->download_offset_);
+      auto download_offset = file_view.is_encrypted_any() ? 0 : node->download_offset_;
+      send_closure(file_load_manager_, &FileLoadManager::update_download_offset, node->download_id_, download_offset);
     }
     return;
   }
@@ -1688,9 +1681,9 @@ void FileManager::run_download(FileNodePtr node) {
   node->is_download_started_ = false;
   LOG(DEBUG) << "Run download of file " << file_id << " of size " << node->size_ << " from " << node->remote_.full()
              << " with suggested name " << node->suggested_name() << " and encyption key " << node->encryption_key_;
+  auto download_offset = file_view.is_encrypted_any() ? 0 : node->download_offset_;
   send_closure(file_load_manager_, &FileLoadManager::download, id, node->remote_.full(), node->local_, node->size_,
-               node->suggested_name(), node->encryption_key_, node->can_search_locally_, node->download_offset_,
-               priority);
+               node->suggested_name(), node->encryption_key_, node->can_search_locally_, download_offset, priority);
 }
 
 void FileManager::resume_upload(FileId file_id, std::vector<int> bad_parts, std::shared_ptr<UploadCallback> callback,