[core, android] Initial playtime implementation (#2535)

So firstly, playtime code is moved to src/common and qt specific code to yuzu/utils.cpp.

The dependency on ProfileManager was removed because it was working properly on Android, and I think a shared playtime is better behavior.
Now, playtime is stored in a file called "playtime.bin".

JNI code is from Azahar although modified by me, as well as that I added code to reset the game's playtime which was missing for some reason on there.

Before this gets merged, I plan to add the ability to manually edit the database as well.

Note: Code still needs a bit of cleanup.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2535
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Co-authored-by: inix <Nixy01@proton.me>
Co-committed-by: inix <Nixy01@proton.me>

3 files changed, 261 insertions, 0 deletions

diff --git a/src/frontend_common/CMakeLists.txt b/src/frontend_common/CMakeLists.txt
index aa44740596..c9ce6f7ad4 100644
--- a/src/frontend_common/CMakeLists.txt
+++ b/src/frontend_common/CMakeLists.txt
@@ -11,6 +11,8 @@ add_library(frontend_common STATIC
     firmware_manager.h
     firmware_manager.cpp
     data_manager.h data_manager.cpp
+    play_time_manager.cpp
+    play_time_manager.h
 )
 
 create_target_directory_groups(frontend_common)
diff --git a/src/frontend_common/play_time_manager.cpp b/src/frontend_common/play_time_manager.cpp
new file mode 100644
index 0000000000..782433392f
--- /dev/null
+++ b/src/frontend_common/play_time_manager.cpp
@@ -0,0 +1,203 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "common/fs/file.h"
+#include "common/fs/fs.h"
+#include "common/fs/path_util.h"
+#include "common/logging/log.h"
+#include "common/settings.h"
+#include "common/thread.h"
+#include "core/hle/service/acc/profile_manager.h"
+#include "play_time_manager.h"
+
+#include <fmt/format.h>
+#include <algorithm>
+
+namespace PlayTime {
+
+namespace {
+
+struct PlayTimeElement {
+    ProgramId program_id;
+    PlayTime play_time;
+};
+
+std::optional<std::filesystem::path> GetCurrentUserPlayTimePath() {
+    return Common::FS::GetEdenPath(Common::FS::EdenPath::PlayTimeDir) /
+           "playtime.bin";
+}
+
+[[nodiscard]] bool ReadPlayTimeFile(PlayTimeDatabase& out_play_time_db) {
+    const auto filename = GetCurrentUserPlayTimePath();
+
+    if (!filename.has_value()) {
+        LOG_ERROR(Frontend, "Failed to get current user path");
+        return false;
+    }
+
+    out_play_time_db.clear();
+
+    if (Common::FS::Exists(filename.value())) {
+        Common::FS::IOFile file{filename.value(), Common::FS::FileAccessMode::Read,
+                                Common::FS::FileType::BinaryFile};
+        if (!file.IsOpen()) {
+            LOG_ERROR(Frontend, "Failed to open play time file: {}",
+                      Common::FS::PathToUTF8String(filename.value()));
+            return false;
+        }
+
+        const size_t num_elements = file.GetSize() / sizeof(PlayTimeElement);
+        std::vector<PlayTimeElement> elements(num_elements);
+
+        if (file.ReadSpan<PlayTimeElement>(elements) != num_elements) {
+            return false;
+        }
+
+        for (const auto& [program_id, play_time] : elements) {
+            if (program_id != 0) {
+                out_play_time_db[program_id] = play_time;
+            }
+        }
+    }
+
+    return true;
+}
+
+[[nodiscard]] bool WritePlayTimeFile(const PlayTimeDatabase& play_time_db) {
+    const auto filename = GetCurrentUserPlayTimePath();
+
+    if (!filename.has_value()) {
+        LOG_ERROR(Frontend, "Failed to get current user path");
+        return false;
+    }
+
+    Common::FS::IOFile file{filename.value(), Common::FS::FileAccessMode::Write,
+                            Common::FS::FileType::BinaryFile};
+    if (!file.IsOpen()) {
+        LOG_ERROR(Frontend, "Failed to open play time file: {}",
+                  Common::FS::PathToUTF8String(filename.value()));
+        return false;
+    }
+
+    std::vector<PlayTimeElement> elements;
+    elements.reserve(play_time_db.size());
+
+    for (auto& [program_id, play_time] : play_time_db) {
+        if (program_id != 0) {
+            elements.push_back(PlayTimeElement{program_id, play_time});
+        }
+    }
+
+    return file.WriteSpan<PlayTimeElement>(elements) == elements.size();
+}
+
+} // namespace
+
+PlayTimeManager::PlayTimeManager()
+    : running_program_id() {
+    if (!ReadPlayTimeFile(database)) {
+        LOG_ERROR(Frontend, "Failed to read play time database! Resetting to default.");
+    }
+}
+
+PlayTimeManager::~PlayTimeManager() {
+    Save();
+}
+
+void PlayTimeManager::SetProgramId(u64 program_id) {
+    running_program_id = program_id;
+}
+
+void PlayTimeManager::Start() {
+    play_time_thread = std::jthread([&](std::stop_token stop_token) { AutoTimestamp(stop_token); });
+}
+
+void PlayTimeManager::Stop() {
+    play_time_thread = {};
+}
+
+void PlayTimeManager::AutoTimestamp(std::stop_token stop_token) {
+    Common::SetCurrentThreadName("PlayTimeReport");
+
+    using namespace std::literals::chrono_literals;
+    using std::chrono::seconds;
+    using std::chrono::steady_clock;
+
+    auto timestamp = steady_clock::now();
+
+    const auto GetDuration = [&]() -> u64 {
+        const auto last_timestamp = std::exchange(timestamp, steady_clock::now());
+        const auto duration = std::chrono::duration_cast<seconds>(timestamp - last_timestamp);
+        return static_cast<u64>(duration.count());
+    };
+
+    while (!stop_token.stop_requested()) {
+        Common::StoppableTimedWait(stop_token, 30s);
+
+        database[running_program_id] += GetDuration();
+        Save();
+    }
+}
+
+void PlayTimeManager::Save() {
+    if (!WritePlayTimeFile(database)) {
+        LOG_ERROR(Frontend, "Failed to update play time database!");
+    }
+}
+
+u64 PlayTimeManager::GetPlayTime(u64 program_id) const {
+    auto it = database.find(program_id);
+    if (it != database.end()) {
+        return it->second;
+    } else {
+        return 0;
+    }
+}
+
+void PlayTimeManager::SetPlayTime(u64 program_id, u64 play_time) {
+    database[program_id] = play_time;
+    Save();
+}
+
+void PlayTimeManager::ResetProgramPlayTime(u64 program_id) {
+    database.erase(program_id);
+    Save();
+}
+
+std::string PlayTimeManager::GetReadablePlayTime(u64 time_seconds) {
+    if (time_seconds == 0) {
+        return {};
+    }
+
+    const auto time_minutes = std::max(static_cast<double>(time_seconds) / 60.0, 1.0);
+    const auto time_hours = static_cast<double>(time_seconds) / 3600.0;
+    const bool is_minutes = time_minutes < 60.0;
+
+    if (is_minutes) {
+        return fmt::format("{:.0f} m", time_minutes);
+    } else {
+        const bool has_remainder = time_seconds % 60 != 0;
+        if (has_remainder) {
+            return fmt::format("{:.1f} h", time_hours);
+        } else {
+            return fmt::format("{:.0f} h", time_hours);
+        }
+    }
+}
+
+std::string PlayTimeManager::GetPlayTimeHours(u64 time_seconds) {
+    return fmt::format("{}", time_seconds / 3600);
+}
+
+std::string PlayTimeManager::GetPlayTimeMinutes(u64 time_seconds) {
+    return fmt::format("{}", (time_seconds % 3600) / 60);
+}
+
+std::string PlayTimeManager::GetPlayTimeSeconds(u64 time_seconds) {
+    return fmt::format("{}", time_seconds % 60);
+}
+
+} // namespace PlayTime
diff --git a/src/frontend_common/play_time_manager.h b/src/frontend_common/play_time_manager.h
new file mode 100644
index 0000000000..a99ccebb1e
--- /dev/null
+++ b/src/frontend_common/play_time_manager.h
@@ -0,0 +1,56 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <map>
+
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include <common/polyfill_thread.h>
+
+// TODO(crueter): Extract this into frontend_common
+namespace Service::Account {
+class ProfileManager;
+}
+
+namespace PlayTime {
+
+using ProgramId = u64;
+using PlayTime = u64;
+using PlayTimeDatabase = std::map<ProgramId, PlayTime>;
+
+class PlayTimeManager {
+public:
+    explicit PlayTimeManager();
+    ~PlayTimeManager();
+
+    YUZU_NON_COPYABLE(PlayTimeManager);
+    YUZU_NON_MOVEABLE(PlayTimeManager);
+
+    u64 GetPlayTime(u64 program_id) const;
+    void ResetProgramPlayTime(u64 program_id);
+    void SetProgramId(u64 program_id);
+    void SetPlayTime(u64 program_id, u64 play_time);
+    void Start();
+    void Stop();
+
+    static std::string GetReadablePlayTime(u64 time_seconds);
+    static std::string GetPlayTimeHours(u64 time_seconds);
+    static std::string GetPlayTimeMinutes(u64 time_seconds);
+    static std::string GetPlayTimeSeconds(u64 time_seconds);
+
+private:
+    void AutoTimestamp(std::stop_token stop_token);
+    void Save();
+
+    PlayTimeDatabase database;
+    u64 running_program_id;
+    std::jthread play_time_thread;
+};
+
+
+} // namespace PlayTime