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notify.c

/*    $calcurse: notify.c,v 1.5 2006/09/16 15:24:34 culot Exp $   */

/*
 * Calcurse - text-based organizer
 * Copyright (c) 2004-2006 Frederic Culot
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Send your feedback or comments to : calcurse@culot.org
 * Calcurse home page : http://culot.org/calcurse
 *
 */

#include <ncurses.h>
#include <pthread.h>
#include <time.h>

#include "i18n.h"
#include "utils.h"
#include "custom.h"
#include "vars.h"
#include "apoint.h"
#include "notify.h"
#include "recur.h"

static struct notify_vars_s *notify = NULL;
static struct notify_app_s *notify_app = NULL;
static pthread_t notify_t_main;

/* Return 1 if we need to display the notify-bar, else 0. */
int notify_bar(void)
{
      int display_bar = 0;

      pthread_mutex_lock(&nbar->mutex);
      display_bar = (nbar->show) ? 1 : 0;
      pthread_mutex_unlock(&nbar->mutex);
      
      return display_bar;
}
/* 
 * Create the notification bar, by initializing all the variables and 
 * creating the notification window (l is the number of lines, c the
 * number of columns, y and x are its coordinates). 
 */
void notify_init_bar(int l, int c, int y, int x)
{
      notify = (struct notify_vars_s *) malloc(sizeof(struct notify_vars_s)); 
      notify_app = (struct notify_app_s *) malloc(sizeof(struct notify_app_s));
      pthread_mutex_init(&notify->mutex, NULL);
      pthread_mutex_init(&notify_app->mutex, NULL);
      notify->win = newwin(l, c, y, x);
      notify_extract_aptsfile();
}

/* Launch the notify-bar main thread. */
void notify_start_main_thread(void) 
{
      pthread_create(&notify_t_main, NULL, notify_main_thread, NULL);
      notify_check_next_app();
      return;
}

/* Stop the notify-bar main thread. */
void notify_stop_main_thread(void)
{
      pthread_cancel(notify_t_main);
      return;
}

/* 
 * The calcurse window geometry as changed so we need to reset the 
 * notification window. 
 */
void notify_reinit_bar(int l, int c, int y, int x)
{
      delwin(notify->win);
      notify->win = newwin(l, c, y, x);
}

/* 
 * Update the notification bar. This is useful when changing color theme
 * for example.
 */
void notify_update_bar(void)
{
      const int space = 3;
      int file_pos, date_pos, app_pos, txt_max_len, too_long = 0;
      int time_left, hours_left, minutes_left;
      char buf[MAX_LENGTH];
      
      date_pos = space;
      pthread_mutex_lock(&notify->mutex);

      file_pos = strlen(notify->date) + strlen(notify->time) + 7 + 2*space;
      app_pos = file_pos + strlen(notify->apts_file) + 2 + space;
      txt_max_len = col - (app_pos + 12 + space);

      custom_apply_attr(notify->win, ATTR_HIGHEST);
      wattron(notify->win, A_UNDERLINE | A_REVERSE);
      mvwhline(notify->win, 0, 0, ACS_HLINE, col);
      mvwprintw(notify->win, 0, date_pos, "[ %s | %s ]", 
            notify->date, notify->time);
      mvwprintw(notify->win, 0, file_pos, "(%s)", notify->apts_file);

      pthread_mutex_lock(&notify_app->mutex);
      if (notify_app->got_app) {
            if (strlen(notify_app->txt) > txt_max_len) {
                  too_long = 1;
                  strncpy(buf, notify_app->txt, txt_max_len - 3);
                  buf[txt_max_len - 3] = '\0';
            }
            time_left = notify_app->time - notify->time_in_sec; 
            if (time_left > 0) {
                  hours_left = (time_left / 3600);
                  minutes_left = (time_left - hours_left*3600) / 60;
                  pthread_mutex_lock(&nbar->mutex);
                  if (time_left < nbar->cntdwn) 
                        wattron(notify->win, A_BLINK);
                  if (too_long)     
                        mvwprintw(notify->win, 0, app_pos, 
                              "> %02d:%02d :: %s.. <", 
                              hours_left, minutes_left, buf);
                  else
                        mvwprintw(notify->win, 0, app_pos, 
                              "> %02d:%02d :: %s <", 
                              hours_left, minutes_left, 
                            notify_app->txt);
                  if (time_left < nbar->cntdwn)
                        wattroff(notify->win, A_BLINK);
                  pthread_mutex_unlock(&nbar->mutex);
            } else {
                  notify_app->got_app = 0;
                  pthread_mutex_unlock(&notify_app->mutex);
                  pthread_mutex_unlock(&notify->mutex);
                  notify_check_next_app();
                  return;
            }
      }
      pthread_mutex_unlock(&notify_app->mutex);

      wattroff(notify->win, A_UNDERLINE | A_REVERSE);
      custom_remove_attr(notify->win, ATTR_HIGHEST);
      wrefresh(notify->win);

      pthread_mutex_unlock(&notify->mutex);
}

/* Extract the appointment file name from the complete file path. */
void notify_extract_aptsfile(void)
{
      notify->apts_file = strrchr(path_apts, '/');
      notify->apts_file++;
}

/* Update the notication bar content */
void *notify_main_thread(void *arg)
{
      unsigned thread_sleep = 1, check_app = 60;
      int elapse = 0, got_app = 0;
      struct tm *ntime;
      time_t ntimer;

      for (;;) {
            ntimer = time(NULL);
            ntime = localtime(&ntimer);
            pthread_mutex_lock(&notify->mutex);
            notify->time_in_sec = ntimer;
            pthread_mutex_lock(&nbar->mutex);
            strftime(notify->time, NOTIFY_FIELD_LENGTH, nbar->timefmt, ntime);
            strftime(notify->date, NOTIFY_FIELD_LENGTH, nbar->datefmt, ntime);
            pthread_mutex_unlock(&nbar->mutex);
            pthread_mutex_unlock(&notify->mutex);
            notify_update_bar();
            sleep(thread_sleep);
            elapse += thread_sleep;
            if (elapse >= check_app) {
                  elapse = 0;
                  pthread_mutex_lock(&notify_app->mutex);
                  got_app = notify_app->got_app;
                  pthread_mutex_unlock(&notify_app->mutex);
                  if (!got_app) notify_check_next_app();
            }
      }
      pthread_exit((void*) 0);
}

/* Launch the thread notify_thread_app to look for next appointment. */
void notify_check_next_app(void)
{
      pthread_t notify_t_app;

      pthread_create(&notify_t_app, NULL, notify_thread_app, NULL);
      return;
}

/* Look for the next appointment within the next 24 hours. */
void *notify_thread_app(void *arg)
{
      struct notify_app_s *tmp_app;
      time_t current_time;

      current_time = time(NULL);

      /* Use a temporary structure not to lock the mutex for a too
       * long time while looking for next appointment. */
      tmp_app = (struct notify_app_s *) malloc(sizeof(struct notify_app_s));
      tmp_app->time = current_time + DAYINSEC;
      tmp_app->got_app = 0;
      tmp_app = recur_apoint_check_next(tmp_app, current_time, today());
      tmp_app = apoint_check_next(tmp_app, current_time);

      pthread_mutex_lock(&notify_app->mutex);
      if (tmp_app->got_app) {
            notify_app->got_app = 1;
            notify_app->time = tmp_app->time;
            notify_app->txt = mycpy(tmp_app->txt);
      } else {
            notify_app->got_app = 0;
      }
      pthread_mutex_unlock(&notify_app->mutex);

      free(tmp_app);
      notify_update_bar();

      pthread_exit((void*) 0);
}

/* Check if the newly created appointment is to be notified. */
void notify_check_added(char *mesg, long start)
{
      time_t current_time;
      int update_notify = 0;
      long gap;

      current_time = time(NULL);
      pthread_mutex_lock(&notify_app->mutex);
      if (!notify_app->got_app) {
            gap = start - current_time;
            if (gap >= 0 && gap <= DAYINSEC) update_notify = 1;
      } else if (start < notify_app->time && start >= current_time) {
            update_notify = 1;
      }
      if (update_notify) {
            notify_app->got_app = 1;
            notify_app->time = start;
            notify_app->txt = mycpy(mesg);      
      }
      pthread_mutex_unlock(&notify_app->mutex);
      notify_update_bar();
}

/* Check if the newly repeated appointment is to be notified. */
void notify_check_repeated(recur_apoint_llist_node_t *i)
{
      long real_app_time;
      int update_notify = 0;
      time_t current_time;

      current_time = time(NULL);
      pthread_mutex_lock(&notify_app->mutex);
      if (real_app_time = recur_item_inday(i->start, i->exc, i->rpt->type,
          i->rpt->freq, i->rpt->until, today()) > current_time) {
            if (!notify_app->got_app) {
                  if (real_app_time - current_time <= DAYINSEC) 
                        update_notify = 1;
            } else if (real_app_time < notify_app->time) {
                  update_notify = 1;
            }
      }
      if (update_notify) {
            notify_app->got_app = 1;
            notify_app->time = real_app_time;
            notify_app->txt = mycpy(i->mesg);   
      }
      pthread_mutex_unlock(&notify_app->mutex);
      notify_update_bar();
}

int notify_same_item(long time)
{
      int same = 0;
      
      pthread_mutex_lock(&(notify_app->mutex));
      if (notify_app->got_app && notify_app->time == time)
            same = 1;
      pthread_mutex_unlock(&(notify_app->mutex));

      return same;
}

int notify_same_recur_item(recur_apoint_llist_node_t *i)
{
      int same = 0;
      long item_start = 0;

      item_start = recur_item_inday(i->start, i->exc, i->rpt->type,
            i->rpt->freq, i->rpt->until, today());
      pthread_mutex_lock(&notify_app->mutex);
      if (notify_app->got_app && item_start == notify_app->time)
            same = 1;
      pthread_mutex_unlock(&(notify_app->mutex));

      return same;
}

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