/*
 * task.h: declares functions for manipulation with tasks
 */

#ifndef TASK_H
#define TASK_H

#include <stdbool.h>
#include <time.h>
#include <stdbool.h>
#include <stdint.h>

enum task_check { // whether to check formula in signal handler or when variable changes
	SIGNAL, VARCHG
};

struct task {
	uint64_t id;

	// Time info
	struct itimerspec times;
	timer_t timerid;

	// Command to run
	int argc; // count of elements in argv 'true' has 1, 'echo Lorem Ipsum' has 3, 'echo Lorem\ ipsum' has 2.
	char **argv; //NULL terminated list of NUL terminated strings

	// Formula to be checked when running
	char *formula; // in RPN, NUL terminated
	enum task_check when;
	bool run; // whether to run task in case of when == VARCHG

	// Disabling/enabling
	bool enabled;
};

bool task_add(struct task t);
bool task_disable(uint64_t id);
bool task_enable(uint64_t id);
bool task_delete(uint64_t id);

struct grow *task_list(void);
struct task task_details(uint64_t id);
bool task_recalc(uint64_t id);

bool task_write(struct task t, int fd);
struct task *task_read(int fd);

bool task_load(const char fn[]);
bool task_save(const char fn[]);
void task_flush(void);

#endif