fix(dict): issues with user db recovery

Author: lotem

src/rime/dict/level_db.cc

@@ -234,10 +234,7 @@ bool LevelDb::Recover() {
   auto status = leveldb::RepairDB(file_name(), leveldb::Options());
   if (status.ok()) {
     LOG(INFO) << "repair finished.";
-    if (Close() && Open()) {
-      LOG(INFO) << "db recovery successful.";
-      return true;
-    }
+    return true;
   }
   LOG(ERROR) << "db recovery failed: " << status.ToString();
   return false;

src/rime/dict/user_db_recovery_task.cc

@@ -30,15 +30,15 @@ bool UserDbRecoveryTask::Run(Deployer* deployer) {
     db_->enable();
   }
   BOOST_SCOPE_EXIT_END
-  //
-  auto r = As<Recoverable>(db_);
-  if (r && r->Recover()) {
-    return true;
-  }
+
   if (db_->loaded()) {
     LOG(WARNING) << "cannot recover loaded db '" << db_->name() << "'.";
     return false;
   }
+  auto r = As<Recoverable>(db_);
+  if (r && r->Recover()) {
+    return true;
+  }
   // repair didn't work on the damanged db file; remove and recreate it
   LOG(INFO) << "recreating db file.";
   if (db_->Exists()) {

src/rime/dict/user_dictionary.cc

@@ -153,7 +153,7 @@ void UserDictionary::Attach(const an<Table>& table,
 }
 
 bool UserDictionary::Load() {
-  if (!db_)
+  if (!db_ || db_->disabled())
     return false;
   if (!db_->loaded() && !db_->Open()) {
     // try to recover managed db in available work thread
@@ -165,9 +165,7 @@ bool UserDictionary::Load() {
     }
     return false;
   }
-  if (!FetchTickCount() && !Initialize())
-    return false;
-  return true;
+  return FetchTickCount() || Initialize();
 }
 
 bool UserDictionary::loaded() const {