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src/core/TodoTxt.h

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+/* 
+ * 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_TODOTXT_H
+#define MIRAI_TODOTXT_H
+
+#include "TaskItem.h"
+#include "utils.h"
+#include <fstream>
+#include <iostream>
+#include <iterator>
+#include <memory>
+#include <regex>
+#include <stdexcept>
+#include <string>
+#include <vector>
+
+namespace mirai {
+
+	class TodoTxtFormat {
+	public:
+
+		static TaskList readFile() {
+			std::ifstream file("../newqml/todo.txt");
+			if (!file.is_open()) {
+				throw std::runtime_error("todo.txt file not found");
+			}
+			std::vector<TaskItem> taskItems;
+			std::string line;
+			while (std::getline(file, line)) {
+				auto taskItem = parseLine(line);
+				taskItems.push_back(taskItem);
+			}
+			file.close();
+			TaskList tasks({
+				.tasks = taskItems
+			});
+			return tasks;
+		}
+
+		static void writeFile(TaskList& tasks) {
+			std::ofstream file("../newqml/todo.txt");
+			if (!file.is_open()) {
+				throw std::runtime_error("can't create todo.txt");
+			}
+			for (const auto& task : tasks.getTasks()) {
+				file << fieldWithSpace(task->state == DONE ? "x" : task->priority);
+				file << fieldWithSpace(task->state == DONE ? task->getDate() : "");
+				file << fieldWithSpace(task->getCreationDate());
+				file << task->getText() << '\n';
+			}
+			file.close();
+		}
+
+	private:
+
+		static std::string fieldWithSpace(const std::string& field) {
+			if (field.length() == 0)
+				return "";
+			return (field + " ");
+		}
+
+		static TaskItem parseLine(const std::string& line) {
+			std::smatch matches;
+			std::regex regex("(^x )?(\\([A-Z]\\) )?([0-9]{4}-[0-9]{2}-[0-9]{2} )?([0-9]{4}-[0-9]{2}-[0-9]{2} )?(.*)");
+			std::regex_match(line, matches, regex);
+		 
+			for (size_t i = 0; i < matches.size(); ++i) {
+                std::ssub_match sub_match = matches[i];
+                std::string piece = sub_match.str();
+            }
+
+			const TaskItemState taskState = trim_copy(matches[1].str()) == "x" ? DONE : TODO;
+			const std::string priority = trim_copy(matches[2].str());
+			const std::string firstDate = trim_copy(matches[3].str());
+			const std::string secondDate = trim_copy(matches[4].str());
+			const std::string text = trim_copy(matches[5].str());
+
+			const std::string date = taskState == DONE ? firstDate : "";
+
+			
+			
+			return {
+				.text = text,
+				.state = taskState,
+				.date = date,
+			};
+		}
+	};
+}
+
+#endif