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apoint.c

/*    $calcurse: apoint.c,v 1.23 2008/04/19 21:05:15 culot Exp $  */

/*
 * Calcurse - text-based organizer
 * Copyright (c) 2004-2008 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 <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <time.h>

#include "i18n.h"
#include "vars.h"
#include "event.h"
#include "apoint.h"
#include "day.h"
#include "custom.h"
#include "notify.h"
#include "recur.h"
#include "calendar.h"

apoint_llist_t *alist_p;
static int hilt = 0;

int
apoint_llist_init (void)
{
  alist_p = (apoint_llist_t *) malloc (sizeof (apoint_llist_t));
  alist_p->root = NULL;
  pthread_mutex_init (&(alist_p->mutex), NULL);

  return (0);
}

/* Sets which appointment is highlighted. */
void
apoint_hilt_set (int highlighted)
{
  hilt = highlighted;
}

void
apoint_hilt_decrease (void)
{
  hilt--;
}

void
apoint_hilt_increase (void)
{
  hilt++;
}

/* Return which appointment is highlighted. */
int
apoint_hilt (void)
{
  return (hilt);
}

apoint_llist_node_t *
apoint_new (char *mesg, char *note, long start, long dur, char state)
{
  apoint_llist_node_t *o, **i;

  o = (apoint_llist_node_t *) malloc (sizeof (apoint_llist_node_t));
  o->mesg = strdup (mesg);
  o->note = (note != NULL) ? strdup (note) : NULL;
  o->state = state;
  o->start = start;
  o->dur = dur;

  pthread_mutex_lock (&(alist_p->mutex));
  i = &alist_p->root;
  for (;;)
    {
      if (*i == 0 || (*i)->start > start)
      {
        o->next = *i;
        *i = o;
        break;
      }
      i = &(*i)->next;
    }
  pthread_mutex_unlock (&(alist_p->mutex));

  return (o);
}

/* 
 * Add an item in either the appointment or the event list,
 * depending if the start time is entered or not.
 */
void
apoint_add (void)
{
#define LTIME 6
  char *mesg_1 =
    _("Enter start time ([hh:mm] or [h:mm]), "
      "leave blank for an all-day event : ");
  char *mesg_2 =
    _("Enter end time ([hh:mm] or [h:mm]) or duration (in minutes) : ");
  char *mesg_3 = _("Enter description :");
  char *format_message_1 =
    _("You entered an invalid start time, should be [h:mm] or [hh:mm]");
  char *format_message_2 =
    _("You entered an invalid end time, should be [h:mm] or [hh:mm] or [mm]");
  char *enter_str = _("Press [Enter] to continue");
  int Id = 1;
  char item_time[LTIME] = "";
  char item_mesg[BUFSIZ] = "";
  long apoint_duration = 0, apoint_start;
  apoint_llist_node_t *apoint_pointeur;
  struct event_s *event_pointeur;
  unsigned heures, minutes;
  unsigned end_h, end_m;
  int is_appointment = 1;

  /* Get the starting time */
  while (check_time (item_time) != 1)
    {
      status_mesg (mesg_1, "");
      if (getstring (win[STA].p, item_time, LTIME, 0, 1) != GETSTRING_ESC)
      {
        if (strlen (item_time) == 0)
          {
            is_appointment = 0;
            break;
          }
        else if (check_time (item_time) != 1)
          {
            status_mesg (format_message_1, enter_str);
            wgetch (win[STA].p);
          }
        else
          sscanf (item_time, "%u:%u", &heures, &minutes);
      }
      else
      return;
    }
  /* 
   * Check if an event or appointment is entered, 
   * depending on the starting time, and record the 
   * corresponding item.
   */
  if (is_appointment)
    {                   /* Get the appointment duration */
      item_time[0] = '\0';
      while (check_time (item_time) == 0)
      {
        status_mesg (mesg_2, "");
        if (getstring (win[STA].p, item_time, LTIME, 0, 1) != GETSTRING_VALID)
          return;       //nothing entered, cancel adding of event
        else if (check_time (item_time) == 0)
          {
            status_mesg (format_message_2, enter_str);
            wgetch (win[STA].p);
          }
        else
          {
            if (check_time (item_time) == 2)
            apoint_duration = atoi (item_time);
            else if (check_time (item_time) == 1)
            {
              sscanf (item_time, "%u:%u", &end_h, &end_m);
              if (end_h < heures)
                {
                  apoint_duration = MININSEC - minutes + end_m
                        + (24 + end_h - (heures + 1)) * MININSEC;
                }
              else
                {
                  apoint_duration = MININSEC - minutes
                        + end_m + (end_h - (heures + 1)) * MININSEC;
                }
            }
          }
      }
    }
  else                        /* Insert the event Id */
    Id = 1;

  status_mesg (mesg_3, "");
  if (getstring (win[STA].p, item_mesg, BUFSIZ, 0, 1) == GETSTRING_VALID)
    {
      if (is_appointment)
      {
        apoint_start = date2sec (*calendar_get_slctd_day (), heures, minutes);
        apoint_pointeur = apoint_new (item_mesg, 0L, apoint_start,
                              min2sec (apoint_duration), 0L);
        if (notify_bar ())
          notify_check_added (item_mesg, apoint_start, 0L);
      }
      else
      event_pointeur = event_new (item_mesg, 0L,
                            date2sec (*calendar_get_slctd_day (), 12,
                                    0), Id);

      if (hilt == 0)
      hilt++;
    }
  erase_status_bar ();
}

/* Delete an item from the appointment list. */
void
apoint_delete (conf_t *conf, unsigned *nb_events, unsigned *nb_apoints)
{
  char *choices = "[y/n] ";
  char *del_app_str = _("Do you really want to delete this item ?");
  const char *errmsg = _("FATAL ERROR in apoint_delete: no such type\n");
  long date;
  int nb_items = *nb_apoints + *nb_events;
  bool go_for_deletion = false;
  int to_be_removed = 0;
  int answer = 0;
  int deleted_item_type = 0;

  date = calendar_get_slctd_day_sec ();

  if (conf->confirm_delete)
    {
      status_mesg (del_app_str, choices);
      answer = wgetch (win[STA].p);
      if ((answer == 'y') && (nb_items != 0))
      go_for_deletion = true;
      else
      {
        erase_status_bar ();
        return;
      }
    }
  else if (nb_items != 0)
    go_for_deletion = true;

  if (go_for_deletion)
    {
      if (nb_items != 0)
      {
        deleted_item_type = day_erase_item (date, hilt, ERASE_DONT_FORCE);
        if (deleted_item_type == EVNT || deleted_item_type == RECUR_EVNT)
          {
            (*nb_events)--;
            to_be_removed = 1;
          }
        else if (deleted_item_type == APPT || deleted_item_type == RECUR_APPT)
          {
            (*nb_apoints)--;
            to_be_removed = 3;
          }
        else if (deleted_item_type == 0)
          {
            to_be_removed = 0;
          }
        else
          ierror (errmsg, IERROR_FATAL);
        /* NOTREACHED */

        if (hilt > 1)
          hilt--;
        if (apad->first_onscreen >= to_be_removed)
          apad->first_onscreen = apad->first_onscreen - to_be_removed;
        if (nb_items == 1)
          hilt = 0;
      }
    }
}

unsigned
apoint_inday (apoint_llist_node_t *i, long start)
{
  if (i->start <= start + DAYINSEC && i->start + i->dur > start)
    {
      return (1);
    }
  return (0);
}

void
apoint_sec2str (apoint_llist_node_t *o, int type, long day, char *start,
            char *end)
{
  struct tm *lt;
  time_t t;

  if (o->start < day && type == APPT)
    {
      strncpy (start, "..:..", 6);
    }
  else
    {
      t = o->start;
      lt = localtime (&t);
      snprintf (start, HRMIN_SIZE, "%02u:%02u", lt->tm_hour, lt->tm_min);
    }
  if (o->start + o->dur > day + DAYINSEC && type == APPT)
    {
      strncpy (end, "..:..", 6);
    }
  else
    {
      t = o->start + o->dur;
      lt = localtime (&t);
      snprintf (end, HRMIN_SIZE, "%02u:%02u", lt->tm_hour, lt->tm_min);
    }
}

void
apoint_write (apoint_llist_node_t *o, FILE *f)
{
  struct tm *lt;
  time_t t;

  t = o->start;
  lt = localtime (&t);
  fprintf (f, "%02u/%02u/%04u @ %02u:%02u",
         lt->tm_mon + 1, lt->tm_mday, 1900 + lt->tm_year, lt->tm_hour,
           lt->tm_min);

  t = o->start + o->dur;
  lt = localtime (&t);
  fprintf (f, " -> %02u/%02u/%04u @ %02u:%02u ",
         lt->tm_mon + 1, lt->tm_mday, 1900 + lt->tm_year, lt->tm_hour,
           lt->tm_min);

  if (o->note != NULL)
    fprintf (f, ">%s ", o->note);

  if (o->state & APOINT_NOTIFY)
    fprintf (f, "!");
  else
    fprintf (f, "|");

  fprintf (f, "%s\n", o->mesg);
}

apoint_llist_node_t *
apoint_scan (FILE *f, struct tm start, struct tm end, char state, char *note)
{
  struct tm *lt;
  char buf[MESG_MAXSIZE], *nl;
  time_t tstart, tend, t;

  t = time (NULL);
  lt = localtime (&t);

  /* Read the appointment description */
  fgets (buf, MESG_MAXSIZE, f);
  nl = strchr (buf, '\n');
  if (nl)
    {
      *nl = '\0';
    }

  start.tm_sec = end.tm_sec = 0;
  start.tm_isdst = end.tm_isdst = -1;
  start.tm_year -= 1900;
  start.tm_mon--;
  end.tm_year -= 1900;
  end.tm_mon--;

  tstart = mktime (&start);
  tend = mktime (&end);
  if (tstart == -1 || tend == -1 || tstart > tend)
    {
      fputs (_("FATAL ERROR in apoint_scan: date error in the appointment\n"),
           stderr);
      exit (EXIT_FAILURE);
    }
  return (apoint_new (buf, note, tstart, tend - tstart, state));
}

/* Retrieve an appointment from the list, given the day and item position. */
apoint_llist_node_t *
apoint_get (long day, int pos)
{
  apoint_llist_node_t *o;
  int n;

  n = 0;
  for (o = alist_p->root; o; o = o->next)
    {
      if (apoint_inday (o, day))
      {
        if (n == pos)
          return (o);
        n++;
      }
    }
  /* NOTREACHED */
  fputs (_("FATAL ERROR in apoint_get: no such item\n"), stderr);
  exit (EXIT_FAILURE);
}

void
apoint_delete_bynum (long start, unsigned num, erase_flag_e flag)
{
  unsigned n;
  int need_check_notify = 0;
  apoint_llist_node_t *i, **iptr;

  n = 0;
  pthread_mutex_lock (&(alist_p->mutex));
  iptr = &alist_p->root;
  for (i = alist_p->root; i != 0; i = i->next)
    {
      if (apoint_inday (i, start))
      {
        if (n == num)
          {
            if (flag == ERASE_FORCE_ONLY_NOTE)
            erase_note (&i->note, flag);
            else
            {
              if (notify_bar ())
                need_check_notify = notify_same_item (i->start);
              *iptr = i->next;
              free (i->mesg);
              erase_note (&i->note, flag);
              free (i);
              pthread_mutex_unlock (&(alist_p->mutex));
              if (need_check_notify)
                notify_check_next_app ();
            }
            return;
          }
        n++;
      }
      iptr = &i->next;
    }
  pthread_mutex_unlock (&(alist_p->mutex));

  /* NOTREACHED */
  ierror (_("FATAL ERROR in apoint_delete_bynum: no such appointment"),
        IERROR_FATAL);
}

/*
 * Return the line number of an item (either an appointment or an event) in
 * the appointment panel. This is to help the appointment scroll function 
 * to place beggining of the pad correctly.
 */
static int
get_item_line (int item_nb, int nb_events_inday)
{
  int separator = 2;
  int line = 0;

  if (item_nb <= nb_events_inday)
    line = item_nb - 1;
  else
    line = nb_events_inday + separator
      + (item_nb - (nb_events_inday + 1)) * 3 - 1;
  return line;
}

/* 
 * Update (if necessary) the first displayed pad line to make the
 * appointment panel scroll down next time pnoutrefresh is called. 
 */
void
apoint_scroll_pad_down (int nb_events_inday, int win_length)
{
  int pad_last_line = 0;
  int item_first_line = 0, item_last_line = 0;
  int borders = 6;
  int awin_length = win_length - borders;

  item_first_line = get_item_line (hilt, nb_events_inday);
  if (hilt < nb_events_inday)
    item_last_line = item_first_line;
  else
    item_last_line = item_first_line + 1;
  pad_last_line = apad->first_onscreen + awin_length;
  if (item_last_line >= pad_last_line)
    apad->first_onscreen = item_last_line - awin_length;
}

/* 
 * Update (if necessary) the first displayed pad line to make the
 * appointment panel scroll up next time pnoutrefresh is called. 
 */
void
apoint_scroll_pad_up (int nb_events_inday)
{
  int item_first_line = 0;

  item_first_line = get_item_line (hilt, nb_events_inday);
  if (item_first_line < apad->first_onscreen)
    apad->first_onscreen = item_first_line;
}

/*
 * Look in the appointment list if we have an item which starts before the item
 * stored in the notify_app structure (which is the next item to be notified).
 */
struct notify_app_s *
apoint_check_next (struct notify_app_s *app, long start)
{
  apoint_llist_node_t *i;

  pthread_mutex_lock (&(alist_p->mutex));
  for (i = alist_p->root; i != 0; i = i->next)
    {
      if (i->start > app->time)
      {
        pthread_mutex_unlock (&(alist_p->mutex));
        return (app);
      }
      else
      {
        if (i->start > start)
          {
            app->time = i->start;
            app->txt = mycpy (i->mesg);
            app->state = i->state;
            app->got_app = 1;
          }
      }
    }
  pthread_mutex_unlock (&(alist_p->mutex));

  return (app);
}

/* 
 * Returns a structure of type apoint_llist_t given a structure of type 
 * recur_apoint_s 
 */
apoint_llist_node_t *
apoint_recur_s2apoint_s (recur_apoint_llist_node_t *p)
{
  apoint_llist_node_t *a;

  a = (apoint_llist_node_t *) malloc (sizeof (apoint_llist_node_t));
  a->mesg = (char *) malloc (strlen (p->mesg) + 1);
  a->start = p->start;
  a->dur = p->dur;
  a->mesg = p->mesg;
  return (a);
}

/*
 * Switch notification state.
 */
void
apoint_switch_notify (void)
{
  apoint_llist_node_t *apoint;
  struct day_item_s *p;
  long date;
  int apoint_nb = 0, n, need_chk_notify;

  p = day_get_item (hilt);
  if (p->type != APPT && p->type != RECUR_APPT)
    return;

  date = calendar_get_slctd_day_sec ();

  if (p->type == RECUR_APPT)
    {
      recur_apoint_switch_notify (date, p->appt_pos);
      return;
    }
  else if (p->type == APPT)
    apoint_nb = day_item_nb (date, hilt, APPT);

  n = 0;
  need_chk_notify = 0;
  pthread_mutex_lock (&(alist_p->mutex));

  for (apoint = alist_p->root; apoint != 0; apoint = apoint->next)
    {
      if (apoint_inday (apoint, date))
      {
        if (n == apoint_nb)
          {
            apoint->state ^= APOINT_NOTIFY;
            if (notify_bar ())
                {
                  notify_check_added (apoint->mesg, apoint->start,
                                      apoint->state);
                }
            pthread_mutex_unlock (&(alist_p->mutex));
            if (need_chk_notify)
            notify_check_next_app ();
            return;
          }
        n++;
      }
    }
  pthread_mutex_unlock (&(alist_p->mutex));

  /* NOTREACHED */
  ierror (_("FATAL ERROR in apoint_switch_notify: no such appointment"),
        IERROR_FATAL);
}

/* Updates the Appointment panel */
void
apoint_update_panel (int which_pan)
{
  int title_xpos;
  int bordr = 1;
  int title_lines = 3;
  int app_width = win[APP].w - bordr;
  int app_length = win[APP].h - bordr - title_lines;
  long date;
  date_t slctd_date;

  /* variable inits */
  slctd_date = *calendar_get_slctd_day ();
  title_xpos = win[APP].w - (strlen (_(monthnames[slctd_date.mm - 1])) + 16);
  if (slctd_date.dd < 10)
    title_xpos++;
  date = date2sec (slctd_date, 0, 0);
  day_write_pad (date, app_width, app_length, hilt);

  /* Print current date in the top right window corner. */
  erase_window_part (win[APP].p, 1, title_lines, win[APP].w - 2,
                     win[APP].h - 2);
  custom_apply_attr (win[APP].p, ATTR_HIGHEST);
  mvwprintw (win[APP].p, title_lines, title_xpos, "%s  %s %d, %d",
           calendar_get_pom (date), _(monthnames[slctd_date.mm - 1]),
           slctd_date.dd, slctd_date.yyyy);
  custom_remove_attr (win[APP].p, ATTR_HIGHEST);

  /* Draw the scrollbar if necessary. */
  if ((apad->length >= app_length) || (apad->first_onscreen > 0))
    {
      float ratio = ((float) app_length) / ((float) apad->length);
      int sbar_length = (int) (ratio * app_length);
      int highend = (int) (ratio * apad->first_onscreen);
      bool hilt_bar = (which_pan == APP) ? true : false;
      int sbar_top = highend + title_lines + 1;

      if ((sbar_top + sbar_length) > win[APP].h - 1)
      sbar_length = win[APP].h - 1 - sbar_top;
      draw_scrollbar (win[APP].p, sbar_top, win[APP].w - 2, sbar_length,
                  title_lines + 1, win[APP].h - 1, hilt_bar);
    }

  wnoutrefresh (win[APP].p);
  pnoutrefresh (apad->ptrwin, apad->first_onscreen, 0,
            win[APP].y + title_lines + 1, win[APP].x + bordr,
            win[APP].y + win[APP].h - 2 * bordr,
            win[APP].x + win[APP].w - 3 * bordr);
}

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