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/* This file is a part of todo
*
* Copyright (C) 2021 Robby Zambito
*
* todo is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* todo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#define _GNU_SOURCE
#include <errno.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static FILE *todo_file;
static void puts_strikethrough(char *text) {
static const char *strike_overlay = "\u0336";
if (text != NULL) {
while (*text != '\0') {
printf("%s%c", strike_overlay, *text);
text++;
}
puts("");
}
}
static void apply_func_to_line(void (*func)(char *), size_t index) {
char *line = NULL;
size_t line_len = 0;
errno = 0;
todo_file = fopen("TODO", "r");
if (todo_file == NULL) {
perror("Could not open the TODO file");
exit(EXIT_FAILURE);
}
errno = 0;
FILE *temp_file = fopen(".TODO", "w");
if (temp_file == NULL) {
perror("Could not open temp TODO file");
exit(EXIT_FAILURE);
}
for (size_t i = 1; getline(&line, &line_len, todo_file) >= 0; i++) {
if (i == index) {
func(line);
}
fprintf(temp_file, "%s", line);
free(line);
}
fclose(todo_file);
fclose(temp_file);
// Clobber old TODO with new .TODO
rename(".TODO", "TODO");
}
void todo_list(void) {
static const char *bold_text = "\e[1m";
static const char *regular_text = "\e[0m";
char *line = NULL;
size_t line_len = 0;
errno = 0;
todo_file = fopen("TODO", "r");
if (todo_file == NULL) {
if (errno == ENOENT) {
// If the file doesn't exist, the list is simply empty
exit(EXIT_SUCCESS);
} else {
perror("Could not open TODO file");
exit(EXIT_FAILURE);
}
}
for (size_t i = 0; getline(&line, &line_len, todo_file) >= 0; i++) {
// Remove trailing newline by setting it to NULL char.
line[strcspn(line, "\n")] = '\0';
if (line_len > 5) {
// Print the index in bold
printf("%s%zu%s ", bold_text, i + 1, regular_text);
// Print the task with a strikethrough if completed
if (line[1] == ' ') {
puts(line + 4);
} else if (line[1] == '*') {
puts_strikethrough(line + 4);
}
}
free(line);
}
fclose(todo_file);
}
void todo_add(int argc, char **argv) {
if (argc < 1) {
fprintf(stderr, "todo add takes at least 1 argument\n");
exit(EXIT_FAILURE);
}
errno = 0;
todo_file = fopen("TODO", "a");
if (todo_file == NULL) {
perror("Could not open the TODO file");
exit(EXIT_FAILURE);
}
for (int i = 0; i < argc; i++) {
fprintf(todo_file, "[ ] %s\n", argv[i]);
}
fclose(todo_file);
}
static void blank(char *task) { task[0] = '\0'; }
void todo_rm(int argc, char **argv) {
if (argc < 1) {
fprintf(stderr, "todo rm takes at least 1 argument\n");
exit(EXIT_FAILURE);
}
size_t remove_index = -1;
errno = 0;
sscanf(argv[0], "%zu", &remove_index);
if (errno != 0 || remove_index < 1) {
perror("Could not parse index");
exit(EXIT_FAILURE);
}
apply_func_to_line(blank, remove_index);
}
static void done(char *task) { task[1] = '*'; }
void todo_done(int argc, char **argv) {
if (argc < 1) {
fprintf(stderr, "todo done takes at least 1 argument\n");
exit(EXIT_FAILURE);
}
size_t done_index = -1;
errno = 0;
sscanf(argv[0], "%zu", &done_index);
if (errno != 0 || done_index < 1) {
perror("Could not parse index");
exit(EXIT_FAILURE);
}
apply_func_to_line(done, done_index);
}
void todo_raw(int argc, char **argv) {
/*open_todo_file();*/
puts("raw");
fclose(todo_file);
}
void todo_sort(void) {
/*open_todo_file();*/
puts("sort");
fclose(todo_file);
}
void todo_help(void) {
puts("Usage: todo [COMMAND] [ARGUMENTS]\n"
"Todo is a super fast and simple tasks organizer written in C.\n"
"Example: todo list\n"
"Available commands:\n"
" - add [TASK/s]\n"
" adds new task/s\n"
" Example: todo add \"buy carrots\"\n"
" - list\n"
" lists all tasks\n"
" Example: todo list\n"
" - done [INDEX]\n"
" marks task as done\n"
" Example: todo done 2 3 (marks second and third tasks as "
"completed)\n"
" - rm [INDEX]\n"
" removes a task\n"
" Example: todo rm 4\n"
" - sort\n"
" sorts completed and uncompleted tasks\n"
" Example: todo sort\n"
" - raw [todo/done]\n"
" prints nothing but done/incompleted tasks in plain text, "
"useful for scripting\n"
" Example: todo raw done\n");
}
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