Open language database.

GitOrigin-RevId: 9765471da4bae835d7159ca90aa99106a251b654

td/telegram/LanguagePackManager.cpp

@@ -12,14 +12,36 @@
 #include "td/telegram/net/NetQueryDispatcher.h"
 #include "td/telegram/Td.h"
 
-#include "td/utils/logging.h"
-#include "td/utils/Status.h"
-
 #include "td/telegram/td_api.h"
 #include "td/telegram/telegram_api.h"
 
+#include "td/db/SqliteKeyValue.h"
+
+#include "td/utils/logging.h"
+#include "td/utils/Status.h"
+
 namespace td {
 
+struct LanguagePackManager::LanguageDatabase {
+  std::mutex mutex_;
+  string path_;
+  SqliteKeyValue kv_;
+  std::unordered_map<string, std::unique_ptr<LanguagePack>> language_packs_;
+};
+
+LanguagePackManager::~LanguagePackManager() = default;
+
+static Result<SqliteKeyValue> open_database(const string &path) {
+  TRY_RESULT(db, SqliteDb::open_with_key(path, DbKey::empty()));
+  TRY_STATUS(db.exec("PRAGMA synchronous=NORMAL"));
+  TRY_STATUS(db.exec("PRAGMA temp_store=MEMORY"));
+  TRY_STATUS(db.exec("PRAGMA encoding=\"UTF-8\""));
+  TRY_STATUS(db.exec("PRAGMA journal_mode=WAL"));
+  SqliteKeyValue kv;
+  TRY_STATUS(kv.init_with_connection(std::move(db), "lang"));
+  return std::move(kv);
+}
+
 void LanguagePackManager::start_up() {
   std::lock_guard<std::mutex> lock(language_database_mutex_);
   manager_count_++;
@@ -29,10 +51,22 @@ void LanguagePackManager::start_up() {
   string database_path = G()->shared_config().get_option_string("language_database_path");
   auto it = language_databases_.find(database_path);
   if (it == language_databases_.end()) {
-    it = language_databases_.emplace(database_path, make_unique<LanguageDatabase>()).first;
-    it->second->path_ = std::move(database_path);
+    SqliteKeyValue kv;
+    if (!database_path.empty()) {
+      auto r_kv = open_database(database_path);
+      if (r_kv.is_error()) {
+        LOG(ERROR) << "Can't open language database " << database_path << ": " << r_kv.error();
+        database_path = string();
+        it = language_databases_.find(database_path);
+      } else {
+        kv = r_kv.move_as_ok();
+      }
+    }
 
-    // TODO open database
+    if (it == language_databases_.end()) {
+      it = language_databases_.emplace(database_path, make_unique<LanguageDatabase>()).first;
+      it->second->path_ = std::move(database_path);
+    }
   }
   database_ = it->second.get();
 

td/telegram/LanguagePackManager.h

@@ -15,6 +15,7 @@
 #include "td/actor/PromiseFuture.h"
 
 #include "td/utils/Container.h"
+#include "td/utils/Status.h"
 
 #include <atomic>
 #include <mutex>
@@ -28,6 +29,11 @@ class LanguagePackManager : public NetQueryCallback {
  public:
   explicit LanguagePackManager(ActorShared<> parent) : parent_(std::move(parent)) {
   }
+  LanguagePackManager(const LanguagePackManager &) = delete;
+  LanguagePackManager &operator=(const LanguagePackManager &) = delete;
+  LanguagePackManager(LanguagePackManager &&) = delete;
+  LanguagePackManager &operator=(LanguagePackManager &&) = delete;
+  ~LanguagePackManager() override;
 
   void on_language_pack_changed();
 
@@ -66,11 +72,7 @@ class LanguagePackManager : public NetQueryCallback {
     std::unordered_map<string, std::unique_ptr<Language>> languages_;
   };
 
-  struct LanguageDatabase {
-    std::mutex mutex_;
-    string path_;
-    std::unordered_map<string, std::unique_ptr<LanguagePack>> language_packs_;
-  };
+  struct LanguageDatabase;
 
   ActorShared<> parent_;
 

td/telegram/TdDb.cpp

@@ -25,7 +25,9 @@
 #include "td/utils/Random.h"
 
 namespace td {
+
 namespace {
+
 std::string get_binlog_path(const TdParameters &parameters) {
   return PSTRING() << parameters.database_directory << "td" << (parameters.use_test_dc ? "_test" : "") << ".binlog";
 }
@@ -434,4 +436,5 @@ void TdDb::with_db_path(std::function<void(CSlice)> callback) {
   SqliteDb::with_db_path(sqlite_path(), callback);
   callback(binlog_path());
 }
+
 }  // namespace td

tddb/td/db/SqliteKeyValue.h

@@ -184,6 +184,9 @@ class SqliteKeyValue {
     }
   }
 
+  bool empty() const {
+    return db_.empty();
+  }
   void clear() {
     *this = SqliteKeyValue();
   }