Added a way to visit users

src/libs/database/impl/User.cpp

@@ -61,6 +61,18 @@ namespace lms::db
         return utils::execRangeQuery<UserId>(query, params.range);
     }
 
+    void User::find(Session& session, const FindParameters& params, const std::function<void(const User::pointer&)>& func)
+    {
+        auto query{ session.getDboSession()->find<User>() };
+
+        if (params.scrobblingBackend)
+            query.where("scrobbling_backend = ?").bind(*params.scrobblingBackend);
+        if (params.feedbackBackend)
+            query.where("feedback_backend = ?").bind(*params.feedbackBackend);
+
+        return utils::forEachQueryRangeResult(query, params.range, func);
+    }
+
     User::pointer User::findDemoUser(Session& session)
     {
         session.checkReadTransaction();

src/libs/database/include/database/User.hpp

@@ -72,6 +72,7 @@ namespace lms::db
         static pointer              find(Session& session, UserId id);
         static pointer              find(Session& session, std::string_view loginName);
         static RangeResults<UserId> find(Session& session, const FindParameters& params);
+        static void                 find(Session& session, const FindParameters& params, const std::function<void(const pointer&)>& func);
         static pointer              findDemoUser(Session& session);
 
         // accessors

src/libs/database/test/CMakeLists.txt

@@ -13,6 +13,7 @@ add_executable(test-database
 	TrackBookmark.cpp
 	TrackFeatures.cpp
 	TrackList.cpp
+	User.cpp
 	)
 
 target_link_libraries(test-database PRIVATE

src/libs/database/test/User.cpp

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2024 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "Common.hpp"
+
+namespace lms::db::tests
+{
+    TEST_F(DatabaseFixture, User)
+    {
+        {
+            auto transaction{ session.createReadTransaction() };
+
+            bool visited{};
+            User::find(session, User::FindParameters{}, [&](const User::pointer&)
+                {
+                    visited = true;
+                });
+            EXPECT_FALSE(visited);
+        }
+
+        ScopedUser user1{ session, "MyUser1" };
+        ScopedUser user2{ session, "MyUser2" };
+
+        {
+            auto transaction{ session.createReadTransaction() };
+
+            std::vector<UserId> visitedUsers;
+            User::find(session, User::FindParameters{}, [&](const User::pointer& user)
+                {
+                    visitedUsers.push_back(user->getId());
+                });
+            EXPECT_EQ(visitedUsers.size(), 2);
+            EXPECT_EQ(visitedUsers[0], user1->getId());
+            EXPECT_EQ(visitedUsers[1], user2->getId());
+        }
+    }
+}