A lot

Signed-off-by: Slendi <slendi@socopon.com>

src/Cache.hpp

@@ -0,0 +1,60 @@
+#pragma once
+
+#include <filesystem>
+#include <optional>
+#include <string>
+#include <variant>
+#include <vector>
+
+#include <SQLiteCpp/Database.h>
+
+namespace Waylight {
+
+struct ApplicationCache {
+	enum class Type {
+		Application,
+		Link,
+		Directory,
+	};
+
+	struct Action {
+		std::string name;
+		// May not exist if DBusActivable=true
+		std::optional<std::string> exec;
+		// Freedesktop Desktop Entry Spec 11.2 Table 3 says:
+		//
+		//   If the name is an absolute path, the given file will be used.
+		//   If the name is not an absolute path, the algorithm described in
+		//   the Icon Theme Specification will be used to locate the icon.
+		//
+		// Thus, when deserializing, we will just check if it starts with /
+		// to determine type.
+		std::optional<std::variant<std::filesystem::path, std::string>> icon;
+	};
+
+	int id;
+	std::filesystem::path desktop_entry_path;
+
+	Type type { Type::Application };
+	bool terminal { false };
+	bool no_display { false };
+	std::optional<std::string> path;
+	std::optional<std::string> comment;
+	std::vector<Action> actions; // There should always be at least 1.
+	bool dbus_activatable {};    // Unimplemented for now.
+};
+
+struct Cache {
+	explicit Cache(std::shared_ptr<SQLite::Database> db);
+
+	void rescan();
+	void dump();
+	void load();
+
+private:
+	std::vector<ApplicationCache> m_apps;
+	std::vector<std::filesystem::path> m_app_dirs;
+	std::shared_ptr<SQLite::Database> m_db;
+};
+
+} // namespace Cache