Move dependencies in 'external' directory and pdate git submodules

external/mirai-core/include/mirai-core/TodoMd.h

@@ -0,0 +1,48 @@
+/*
+ * Mirai. Copyright (C) 2024 Vyn
+ * This file is licensed under version 3 of the GNU General Public License (GPL-3.0-only)
+ * The license can be found in the LICENSE file or at https://www.gnu.org/licenses/gpl-3.0.txt
+ */
+
+#ifndef MIRAI_TODOMD_H
+#define MIRAI_TODOMD_H
+
+#include "DateTime.h"
+#include "Day.h"
+#include "Event.h"
+#include "TaskItem.h"
+#include <format>
+#include <optional>
+#include <sstream>
+#include <stdexcept>
+#include <string>
+#include <vector>
+
+namespace mirai
+{
+
+struct MiraiMarkdownFormatParseResult {
+	std::string name;
+	std::vector<DayData> days;
+};
+
+class TodoMdFormat
+{
+  public:
+	static std::string
+	stringify(const std::string &name, const std::vector<std::unique_ptr<Day>> &days);
+
+	static MiraiMarkdownFormatParseResult parse(const std::string &content);
+
+	static std::string taskToString(const TaskItem &task);
+	static TaskItemData stringToTask(const std::string &str, const std::string &date);
+	static EventData stringToEvent(const std::string &str, const std::string &date);
+
+  private:
+	static std::string fieldWithSpace(const std::string &field);
+	static TaskItem parseLine(const std::string &line);
+	static Tags extractTagsFromMetadata(std::string metadata);
+};
+} // namespace mirai
+
+#endif