Add caching

src/CMakeLists.txt

@@ -11,6 +11,8 @@ add_executable(${PROJECT_NAME}
         Tui.h
         Command.h
         Command.cpp
+        Pager.cpp
+        Pager.hpp
 )
 
 target_link_libraries(${PROJECT_NAME} PRIVATE LibXml2::LibXml2 cpr::cpr)

src/Page.hpp

@@ -32,6 +32,7 @@ public:
     Page &operator-=(int);
 
     [[nodiscard]] std::string str_pretty() const;
+
     [[nodiscard]] std::string str() const;
 
     bool refresh();

src/Pager.cpp

@@ -0,0 +1,50 @@
+//  _____         _  _____
+// |_   _|____  _| ||_   _|_   __
+//   | |/ _ \ \/ / __|| | \ \ / /
+//   | |  __/>  <| |_ | |  \ V /
+//   |_|\___/_/\_\\__||_|   \_/
+// Author: Love Billenius <lovebillenius@disroot.org>
+// License: GPL-3
+
+
+#include "Pager.hpp"
+
+Page &Pager::seek(const int number) {
+    Page &page = get_page_at(number);
+    m_page_number = number;
+    return page;
+}
+
+Pager &Pager::operator+=(const int number) {
+    seek(m_page_number + number);
+    return *this;
+}
+
+Pager &Pager::operator-=(const int number) {
+    seek(m_page_number - number);
+    return *this;
+}
+
+Page &Pager::operator*() {
+    return get_page_at(m_page_number);
+}
+
+Page *Pager::operator->() {
+    return &get_page_at(m_page_number);
+}
+
+void Pager::set(const int number) {
+    m_page_number = number;
+}
+
+void Pager::clear() {
+    m_pages.clear();
+}
+
+Page &Pager::get_page_at(const int number) {
+    if (!m_pages.contains(number)) {
+        const Page p(number);
+        m_pages[number] = p;
+    }
+    return m_pages.at(number);
+}

src/Pager.hpp

@@ -0,0 +1,41 @@
+//  _____         _  _____
+// |_   _|____  _| ||_   _|_   __
+//   | |/ _ \ \/ / __|| | \ \ / /
+//   | |  __/>  <| |_ | |  \ V /
+//   |_|\___/_/\_\\__||_|   \_/
+// Author: Love Billenius <lovebillenius@disroot.org>
+// License: GPL-3
+
+#pragma once
+
+#include <unordered_map>
+
+#include "Page.hpp"
+
+
+class Pager {
+public:
+    Pager() = default;
+
+    Page &seek(int number);
+
+    Pager &operator+=(int number);
+
+    Pager &operator-=(int number);
+
+    Page &operator*();
+    Page *operator->();
+
+    void set(int number);
+
+    Page &get();
+
+    void clear();
+
+private:
+    Page &get_page_at(int number);
+
+private:
+    std::unordered_map<int, Page> m_pages{};
+    int m_page_number = 100;
+};

src/Tui.cpp

@@ -14,11 +14,11 @@
 #include <utility>
 
 #include "Command.h"
+#include "Pager.hpp"
 
-Tui::Tui(Page page) : m_page(std::move(page)) {
+Tui::Tui(Pager pager) : m_pager(std::move(pager)) {
 }
 
-
 std::optional<int> get_page_number(const std::string_view line) {
     const size_t space = line.find_first_of(' ');
     if (space == std::string::npos)
@@ -50,7 +50,7 @@ void printHelp() {
 }
 
 void Tui::run() {
-    std::cout << m_page.str_pretty() << std::endl;
+    std::cout << m_pager->str_pretty() << std::endl;
     for (;;) {
         std::cout << "Enter a command: ";
         std::flush(std::cout);
@@ -71,23 +71,23 @@ void Tui::run() {
                 std::cout << "Invalid command!" << std::endl;
             } else if constexpr (std::is_same_v<T, Command::Next>) {
                 try {
-                    m_page += 1;
+                    m_pager += 1;
                 } catch (const std::runtime_error &e) {
                     std::cout << e.what() << std::endl;
                     return;
                 }
-                std::cout << m_page.str_pretty() << std::endl;
+                std::cout << m_pager->str_pretty() << std::endl;
             } else if constexpr (std::is_same_v<T, Command::Previous>) {
                 try {
-                    m_page -= 1;
+                    m_pager -= 1;
                 } catch (const std::runtime_error &e) {
                     std::cout << e.what() << std::endl;
                     return;
                 }
-                std::cout << m_page.str_pretty() << std::endl;
+                std::cout << m_pager->str_pretty() << std::endl;
             } else if constexpr (std::is_same_v<T, Command::Refresh>) {
-                m_page.refresh();
-                std::cout << m_page.str_pretty() << std::endl;
+                m_pager.clear();
+                std::cout << m_pager->str_pretty() << std::endl;
             } else if constexpr (std::is_same_v<T, Command::Exit>) {
                 should_exit = true;
             } else if constexpr (std::is_same_v<T, Command::Help>) {
@@ -96,12 +96,12 @@ void Tui::run() {
                 const Command::Seek &seek = arg;
                 const int number = seek.number;
                 try {
-                    m_page = Page(number);
+                    m_pager.seek(number);
                 } catch (const std::runtime_error &e) {
                     std::cout << e.what() << std::endl;
                     return;
                 }
-                std::cout << m_page.str_pretty() << std::endl;
+                std::cout << m_pager->str_pretty() << std::endl;
             }
         };
         std::visit(visitor, command);

src/Tui.h

@@ -7,15 +7,15 @@
 // License: GPL-3
 
 #pragma once
-#include "Page.hpp"
+#include "Pager.hpp"
 
 
 class Tui {
 public:
-    Tui(Page page);
+    Tui(Pager pager);
 
     void run();
 
 private:
-    Page m_page;
+    Pager m_pager;
 };

src/main.cpp

@@ -6,10 +6,9 @@
 // Author: Love Billenius <lovebillenius@disroot.org>
 // License: GPL-3
 
-#include "Page.hpp"
 #include "Tui.h"
 
 int main(int argc, char *argv[]) {
-    Tui tui = Page();
+    Tui tui(Pager{});
     tui.run();
 }