F.E.I.S/src/notifications_queue.cpp

#include "notifications_queue.hpp"

#include <imgui.h>

void NotificationsQueue::push(const std::shared_ptr<Notification>& notification) {
    while (queue.size() >= max_size) {
        queue.pop_back();
    }
    queue.push_front(notification);
    last_push.restart();
}

void NotificationsQueue::display() {
    update();
    if (not queue.empty()) {
        ImGui::PushStyleVar(ImGuiStyleVar_WindowBorderSize, 0);
        ImGui::SetNextWindowPos(ImVec2(5, 20), ImGuiCond_Always);
        ImGui::Begin(
            "Notifications",
            nullptr,
            ImGuiWindowFlags_NoNav | ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_NoInputs
                | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoBackground | ImGuiWindowFlags_AlwaysAutoResize
                | ImGuiWindowFlags_NoFocusOnAppearing);
        {
            float alpha = 1.0f;
            if (queue.size() == 1) {
                alpha = time_to_alpha(last_push.getElapsedTime().asSeconds() / 4.0f);
            } else {
                alpha = time_to_alpha(last_push.getElapsedTime().asSeconds());
            }
            for (
                auto notif = queue.rbegin();
                notif != queue.rend();
                ++notif
            ) {
                if (notif == queue.crbegin()) {
                    ImGui::PushStyleVar(ImGuiStyleVar_Alpha, alpha);
                    (*notif)->display();
                    ImGui::PopStyleVar();
                } else {
                    (*notif)->display();
                }
            }
        }
        ImGui::End();
        ImGui::PopStyleVar();
    }
}

void NotificationsQueue::update() {
    if (queue.size() > 1) {
        if (last_push.getElapsedTime().asSeconds() > 0.5f) {
            queue.pop_back();
            last_push.restart();
        }
    } else if (queue.size() == 1) {
        if (last_push.getElapsedTime().asSeconds() > 2.f) {
            queue.pop_back();
            last_push.restart();
        }
    }
}