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/* See LICENSE file for copyright and license details. */
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "tasklst.h"
static int task_lst_count_status(TaskLst list, int status);
static Task *task_lst_get_last_task(TaskLst list);
static int
task_lst_count_status(TaskLst list, int status)
{
int total;
Task *ptr;
for (ptr = list.first, total = 0; ptr != NULL; ptr = ptr->next) {
if (ptr->status == status)
++total;
}
return total;
}
static Task *
task_lst_get_last_task(TaskLst list)
{
Task *ptr, *next;
ptr = list.first;
while (ptr != NULL) {
next = ptr->next;
if (next == NULL)
return ptr;
ptr = next;
}
return ptr;
}
void
task_lst_init(TaskLst *list)
{
list->expiry = 0;
list->first = NULL;
}
void
task_lst_cleanup(TaskLst *list)
{
Task *ptr, *next;
ptr = list->first;
while (ptr != NULL) {
next = ptr->next;
free(ptr);
ptr = next;
}
}
void
task_lst_set_expiration(TaskLst *list, int64_t delta)
{
list->expiry = time(NULL) + delta;
}
int
task_lst_expired(TaskLst list)
{
return (time(NULL) > list.expiry) ? 1 : 0;
}
int
task_lst_count_todo(TaskLst list)
{
return task_lst_count_status(list, TASK_TODO);
}
int
task_lst_count_done(TaskLst list)
{
return task_lst_count_status(list, TASK_DONE);
}
Task *
task_lst_get_task(TaskLst list, int i)
{
Task *ptr;
for (ptr = list.first; i > 0; ptr = ptr->next) {
if (ptr == NULL) /* We're out of bounds */
return NULL;
--i;
}
return ptr;
}
int
task_lst_add_task(TaskLst *list, int status, const char *str)
{
Task *last, *newtask;
newtask = malloc(sizeof(Task));
if (newtask == NULL)
return -1;
newtask->status = status;
strncpy(newtask->tdesc, str, TASK_LST_DESC_MAX_SIZE);
last = task_lst_get_last_task(*list);
if (last == NULL)
list->first = newtask;
else
last->next = newtask;
newtask->prev = last; /* Also if last == NULL */
newtask->next = NULL;
return 0;
}
int
task_lst_edit_task(TaskLst *list, int i, const char *newstr)
{
Task *edit;
if ((edit = task_lst_get_task(*list, i)) == NULL)
return -1;
strncpy(edit->tdesc, newstr, TASK_LST_DESC_MAX_SIZE);
return 0;
}
int
task_lst_del_task(TaskLst *list, int i)
{
Task *del, *prev, *next;
if ((del = task_lst_get_task(*list, i)) == NULL)
return -1;
prev = del->prev;
next = del->next;
if (prev != NULL)
prev->next = next;
if (next != NULL)
next->prev = prev;
if (list->first == del)
list->first = next;
free(del);
return 0;
}
int
task_lst_read_from_file(TaskLst *list, FILE *fp)
{
int stat_buf;
char *ptr, *endptr;
char linebuf[TASK_LST_DESC_MAX_SIZE];
task_lst_init(list);
if (fscanf(fp, "%" SCNd64 "\n", &list->expiry) <= 0)
return -1;
while (feof(fp) == 0) {
if (fgets(linebuf, sizeof(linebuf), fp) == NULL)
break;
ptr = strtok(linebuf, "\t");
if (ptr == NULL)
return -1;
stat_buf = strtol(ptr, &endptr, 10);
if (endptr[0] != '\0')
return -1;
ptr = strtok(NULL, "\n");
if (ptr == NULL)
return -1;
task_lst_add_task(list, stat_buf, ptr);
}
return 0;
}
void
task_lst_write_to_file(FILE *fp, TaskLst list)
{
Task *ptr;
fprintf(fp, "%" PRId64 "\n", list.expiry);
for (ptr = list.first; ptr != NULL; ptr = ptr->next)
fprintf(fp, "%d\t%s\n", ptr->status, ptr->tdesc);
}
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