<?php

/*

Copyright (c) 2005-2008, Alex Tingle.  $Revision: 287 $

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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

*/

/** Report an error if EventCalendar not yet installed. */

function ec3_check_installed($title)

{

  global $ec3;

  if(!$ec3->event_category)

  {?>

    <div style="background-color:black; color:red; border:2px solid red; padding:1em">

     <div style="font-size:large"><?php echo $title; ?></div>

     <?php _e('You must choose an event category.','ec3'); ?>

     <a style="color:red; text-decoration:underline" href="<?php echo

       get_option('home');?>/wp-admin/options-general.php?page=ec3_admin">

      <?php _e('Go to Event Calendar Options','ec3'); ?>

     </a>

    </div>

   <?php

  }

  return $ec3->event_category;

}

/** Calculate the header (days of week). */

function ec3_util_thead()

{

  global

    $ec3,

    $weekday,

    $weekday_abbrev,

    $weekday_initial;

  $result="<thead><tr>\n";

  $start_of_week =intval( get_option('start_of_week') );

  for($i=0; $i<7; $i++)

  {

    $full_day_name=$weekday[ ($i+$start_of_week) % 7 ];

    if(3==$ec3->day_length)

        $display_day_name=$weekday_abbrev[$full_day_name];

    elseif($ec3->day_length<3)

        $display_day_name=$weekday_initial[$full_day_name];

    else

        $display_day_name=$full_day_name;

    $result.="\t<th abbr='$full_day_name' scope='col' title='$full_day_name'>"

           . "$display_day_name</th>\n";

  }

  $result.="</tr></thead>\n";

  return $result;

}

/** Echos the event calendar navigation controls. */

function ec3_get_calendar_nav($date,$num_months)

{

  global $ec3;

  echo "<table class='nav'><tbody><tr>\n";

  // Previous

  $prev=$date->prev_month();

  echo "\t<td id='prev'><a id='ec3_prev' href='" . $prev->month_link() . "'"

     . '>&laquo;&nbsp;' . $prev->month_abbrev() . "</a></td>\n";

  echo "\t<td><img id='ec3_spinner' style='display:none' src='" 

     . $ec3->myfiles . "/ec_load.gif' alt='spinner' />\n";

  // iCalendar link.

  $webcal=get_option('home') . "/?ec3_ical";

  // Macintosh always understands webcal:// protocol.

  // It's hard to guess on other platforms, so stick to http://

  if(strstr($_SERVER['HTTP_USER_AGENT'],'Mac OS X'))

      $webcal=preg_replace('/^http:/','webcal:',$webcal);

  echo "\t    <a id='ec3_publish' href='$webcal'"

     . " title='" . __('Subscribe to iCalendar.','ec3') ."'>\n"

     . "\t     <img src='$ec3->myfiles/publish.gif' alt='iCalendar' />\n"

     . "\t    </a>\n";

  echo "\t</td>\n";

  // Next

  $next=$date->plus_months($num_months);

  echo "\t<td id='next'><a id='ec3_next' href='" . $next->month_link() . "'"

     . '>' . $next->month_abbrev() . "&nbsp;&raquo;</a></td>\n";

  echo "</tr></tbody></table>\n";

}

/** Generates an array of all 'ec3_Day's between the start of

 *  begin_month & end_month. Indexed by day_id.

 *  month_id is in the form: ec3_<year_num>_<month_num> */

function ec3_util_calendar_days($begin_month_id,$end_month_id)

{

  $begin_date=date('Y-m-d 00:00:00',ec3_dayid2php($begin_month_id));

  $end_date  =date('Y-m-d 00:00:00',ec3_dayid2php($end_month_id));

  global $ec3, $wpdb;

  $sql=

    "SELECT DISTINCT

       id,

       post_title,

       GREATEST(start,'$begin_date') AS start_date,

       LEAST(end,'$end_date') AS end_date,

       allday,

       1 AS is_event

     FROM $wpdb->posts,$ec3->schedule

     WHERE post_status='publish'

       AND post_type='post'

       AND post_id=id

       AND end>='$begin_date'

       AND start<'$end_date'";

  if(!$ec3->show_only_events)

  {

    // We are interested in normal posts, as well as events.

    $sql="( $sql ) UNION

     ( SELECT DISTINCT

         id,

         post_title,

         post_date AS start_date,

         post_date AS end_date,

         0 AS allday,

         0 AS is_event

       FROM $wpdb->posts

       WHERE post_status='publish'

         AND post_type='post'

         AND post_date>='$begin_date'

         AND post_date<'$end_date'

         AND post_date<NOW()

     )";

  }

  $sql.=' ORDER BY id, allday DESC, start_date, is_event DESC';

  $calendar_entries = $wpdb->get_results($sql);

  $calendar_days = array(); // result

  if(!$calendar_entries)

      return $calendar_days;

  // In advanced mode, we don't want to show events as blog posts in the cal.

  $ignore_post_ids=array();

  if($ec3->advanced && !$ec3->show_only_events)

  {

    foreach($calendar_entries as $ent)

      if($ent->is_event)

        $ignore_post_ids[] = $ent->id;

  }

  $current_post_id=0;

  $current_day_id ='';

  $time_format=get_option('time_format');

  $allday=str_replace(' ',' ',__('all day','ec3')); // #160==nbsp

  foreach($calendar_entries as $ent)

  {

    if(!$ent->is_event && in_array($ent->id,$ignore_post_ids))

        continue;

    if($current_post_id!=$ent->id)

    {

      $current_post_id=$ent->id;

      $current_day_id='';

    }

    $date=ec3_mysql2date($ent->start_date);

    $end_date=ec3_mysql2date($ent->end_date);

    while(true)

    {

      $day_id=$date->day_id();

      if($current_day_id==$day_id)

          break;

      $current_day_id=$day_id;

      if(empty($calendar_days[$day_id]))

          $calendar_days[$day_id] = new ec3_Day();

      if($ent->allday)

          $time=$allday;

      else

          $time=mysql2date($time_format,$ent->start_date);

      //?? Should only record start time on FIRST day.

      $calendar_days[$day_id]->add_post($ent->post_title,$time,$ent->is_event);

      if($date->to_unixdate()==$end_date->to_unixdate())

        break;

      $date->increment_day();

    }

  }

  return $calendar_days;

}

/** Echos one event calendar month table. */

function ec3_get_calendar_month($date,$calendar_days,$thead)

{

  global $ec3;

  //

  // Table start.

  $title=

    sprintf(__('View posts for %1$s %2$s'),$date->month_name(),$date->year_num);

  echo "<table id='" . $date->month_id() . "'>\n<caption>"

    . '<a href="' . $date->month_link() . '" title="' . $title . '">'

    . $date->month_name() . ' ' . $date->year_num . "</a></caption>\n";

  echo $thead;

  //

  // Table body

  echo "<tbody>\n\t<tr>";

  $days_in_month =$date->days_in_month();

  $week_day=( $date->week_day() + 7 - intval(get_option('start_of_week')) ) % 7;

  $col =0;

  while(True)

  {

    if($col>6)

    {

      echo "</tr>\n\t<tr>";

      $col=0;

    }

    if($col<$week_day)

    {

      // insert padding

      $pad=$week_day-$col;

      echo "<td colspan='$pad' class='pad'>&nbsp;</td>";

      $col=$week_day;

    }

    // insert day

    $day_id = $date->day_id();

    echo "<td id='$day_id'";

    if(array_key_exists($day_id,$calendar_days))

    {

      echo ' class="ec3_postday';

      if($calendar_days[$day_id]->is_event)

          echo ' ec3_eventday';

      echo '">';

      echo '<a href="' . $date->day_link()

         . '" title="' . $calendar_days[$day_id]->get_titles() . '"';

      if($calendar_days[$day_id]->is_event)

          echo ' class="eventday"';

      echo ">$date->day_num</a>";

    }

    else

    {

      echo '>' . $date->day_num;

    }

    echo '</td>';

    $col++;

    $date->increment_day();

    if(1==$date->day_num)

        break;

    $week_day=($week_day+1) % 7;

  }

  // insert padding

  $pad=7-$col;

  if($pad>1)

      echo "<td colspan='$pad' class='pad' style='vertical-align:bottom'>"

      . "<a href='http://blog.firetree.net/?ec3_version=$ec3->version'"

      . " title='Event Calendar $ec3->version'"

      . ($ec3->hide_logo? " style='display:none'>": ">")

      . "<span class='ec3_ec'><span>EC</span></span></a></td>";

  elseif($pad)

      echo "<td colspan='$pad' class='pad'>&nbsp;</td>";

  echo "</tr>\n</tbody>\n</table>";

}

/** Template function. Call this from your template to insert the

 *  Event Calendar. */

function ec3_get_calendar()

{

  if(!ec3_check_installed(__('Event Calendar','ec3')))

    return;

  global $ec3;

  // Can't cope with more than one calendar on the same page. Everything has

  // a unique ID, so it can't be duplicated.

  // Simple fix for problem: Just ignore all calls after the first.

  $ec3->call_count++;

  if($ec3->call_count>1)

  {

    echo "<!-- You can only have one Event Calendar on each page. -->\n";

    return;

  }

  echo "<div id='wp-calendar'>\n";

  $this_month = new ec3_Date();

  // Display navigation panel.

  if(0==$ec3->navigation)

    ec3_get_calendar_nav($this_month,$ec3->num_months);

  // Get entries

  $end_month=$this_month->plus_months($ec3->num_months);

  $calendar_days =

    ec3_util_calendar_days(

      $this_month->month_id(),

      $end_month->month_id()

    );

  // Display months.

  $thead=ec3_util_thead();

  for($i=0; $i<$ec3->num_months; $i++)

  {

    $next_month=$this_month->next_month();

    ec3_get_calendar_month($this_month,$calendar_days,$thead);

    $this_month=$next_month;

  }

  // Display navigation panel.

  if(1==$ec3->navigation)

    ec3_get_calendar_nav(new ec3_Date(),$ec3->num_months);

  echo "</div>\n";

  if(!$ec3->disable_popups)

    echo "\t<script type='text/javascript' src='"

    .    $ec3->myfiles . "/popup.js'></script>\n";

}

/** Substitutes placeholders like '%key%' in $format with 'value' from $data

 *  array. */

function ec3_format_str($format,$data)

{

  foreach($data as $k=>$v)

      $format=str_replace("%$k%",$v,$format);

  return $format;

}

define('EC3_DEFAULT_TEMPLATE_EVENT','<a href="%LINK%">%TITLE% (%TIME%)</a>');

define('EC3_DEFAULT_TEMPLATE_DAY',  '%DATE%:');

define('EC3_DEFAULT_DATE_FORMAT',   'j F');

define('EC3_DEFAULT_TEMPLATE_MONTH','');

define('EC3_DEFAULT_MONTH_FORMAT',  'F Y');

/** Template function. Call this from your template to insert a list of

 *  forthcoming events. Available template variables are:

 *   - template_day: %DATE% %SINCE% (only with Time Since plugin)

 *   - template_event: %DATE% %TIME% %LINK% %TITLE% %AUTHOR%

 */

function ec3_get_events(

  $limit,

  $template_event=EC3_DEFAULT_TEMPLATE_EVENT,

  $template_day  =EC3_DEFAULT_TEMPLATE_DAY,

  $date_format   =EC3_DEFAULT_DATE_FORMAT,

  $template_month=EC3_DEFAULT_TEMPLATE_MONTH,

  $month_format  =EC3_DEFAULT_MONTH_FORMAT)

{

  if(!ec3_check_installed(__('Upcoming Events','ec3')))

    return;

  global $ec3,$wpdb,$wp_version;

  // Parse $limit:

  //  NUMBER      - limits number of posts

  //  NUMBER days - next NUMBER of days

  if(empty($limit))

  {

    $limit_numposts='LIMIT 5';

  }

  elseif(preg_match('/^ *([0-9]+) *d(ays?)?/',$limit,$matches))

  {

    $secs=intval($matches[1])*24*3600;

    $and_before="AND start<='".ec3_strftime('%Y-%m-%d',time()+$secs)."'";

  }

  elseif(intval($limit)<1)

  {

    $limit_numposts='LIMIT 5';

  }

  else

  {

    $limit_numposts='LIMIT '.intval($limit);

  }

  if(!$date_format)

      $date_format=get_option('date_format');

  // Find the upcoming events.

  $calendar_entries = $wpdb->get_results(

    "SELECT DISTINCT

       p.id AS id,

       post_title,

       start,

       u.$ec3->wp_user_nicename AS author,

       allday

     FROM $ec3->schedule s

     LEFT JOIN $wpdb->posts p ON s.post_id=p.id

     LEFT JOIN $wpdb->users u ON p.post_author = u.id

     WHERE p.post_status='publish'

       AND end>='$ec3->today' $and_before

     ORDER BY start $limit_numposts"

  );

  echo "<ul class='ec3_events'>";

  echo "<!-- Generated by Event Calendar v$ec3->version -->\n";

  if($calendar_entries)

  {

    $time_format=get_option('time_format');

    $current_month=false;

    $current_date=false;

    $data=array();

    foreach($calendar_entries as $entry)

    {

      // To use %SINCE%, you need Dunstan's 'Time Since' plugin.

      if(function_exists('time_since'))

          $data['SINCE']=time_since( time(), ec3_to_time($entry->start) );

      // Month changed?

      $data['MONTH']=mysql2date($month_format,$entry->start);

      if((!$current_month || $current_month!=$data['MONTH']) && $template_month)

      {

        if($current_date)

            echo "</ul></li>\n";

        if($current_month)

            echo "</ul></li>\n";

        echo "<li class='ec3_list ec3_list_month'>"

        .    ec3_format_str($template_month,$data)."\n<ul>\n";

        $current_month=$data['MONTH'];

        $current_date=false;

      }

      // Date changed?

      $data['DATE'] =mysql2date($date_format, $entry->start);

      if((!$current_date || $current_date!=$data['DATE']) && $template_day)

      {

        if($current_date)

            echo "</ul></li>\n";

        echo "<li class='ec3_list ec3_list_day'>"

        .    ec3_format_str($template_day,$data)."\n<ul>\n";

        $current_date=$data['DATE'];

      }

      if($entry->allday)

          $data['TIME']=__('all day','ec3');

      else

          $data['TIME']=mysql2date($time_format,$entry->start);

      $data['TITLE'] =

        htmlentities(

          stripslashes(strip_tags($entry->post_title)),

          ENT_QUOTES,get_option('blog_charset')

        );

      $data['LINK']  =get_permalink($entry->id);

      $data['AUTHOR']=

        htmlentities($entry->author,ENT_QUOTES,get_option('blog_charset'));

      echo " <li>".ec3_format_str($template_event,$data)."</li>\n";

    }

    if($current_date)

        echo "</ul></li>\n";

    if($current_month)

        echo "</ul></li>\n";

  }

  else

  {

    echo "<li>".__('No events.','ec3')."</li>\n";

  }

  echo "</ul>\n";

}

define('EC3_DEFAULT_FORMAT_SINGLE','<tr><td colspan="3">%s</td></tr>');

define('EC3_DEFAULT_FORMAT_RANGE','<tr><td class="ec3_start">%1$s</td>'

 . '<td class="ec3_to">%3$s</td><td class="ec3_end">%2$s</td></tr>');

define('EC3_DEFAULT_FORMAT_WRAPPER','<table class="ec3_schedule">%s</table>');

/** Formats the schedule for the current post.

 *  Returns the HTML fragment as a string. */

function ec3_get_schedule(

  $format_single =EC3_DEFAULT_FORMAT_SINGLE,

  $format_range  =EC3_DEFAULT_FORMAT_RANGE,

  $format_wrapper=EC3_DEFAULT_FORMAT_WRAPPER

)

{

  global $ec3,$post;

  // Should have been set by ec3_filter_the_posts()

  if(!$post || !$post->ec3_schedule)

      return '';

  $result='';

  $date_format=get_option('date_format');

  $time_format=get_option('time_format');

  $current=false;

  foreach($post->ec3_schedule as $s)

  {

    $date_start=mysql2date($date_format,$s->start);

    $date_end  =mysql2date($date_format,$s->end);

    $time_start=mysql2date($time_format,$s->start);

    $time_end  =mysql2date($time_format,$s->end);

    if($s->allday)

    {

      if($date_start!=$date_end)

      {

        $result.=sprintf($format_range,$date_start,$date_end,__('to','ec3'));

      }

      elseif($date_start!=$current)

      {

        $current=$date_start;

        $result.=sprintf($format_single,$date_start);

      }

    }

    else

    {

      if($date_start!=$date_end)

      {

        $current=$date_start;

        $result.=sprintf($format_range,

          "$date_start $time_start","$date_end $time_end",__('to','ec3'));

      }

      else

      {

        if($date_start!=$current)

        {

          $current=$date_start;

          $result.=sprintf($format_single,$date_start);

        }

        if($time_start==$time_end)