<?php defined("SYSPATH") or die("No direct script access.");
/**
 * Gallery - a web based photo album viewer and editor
 * Copyright (C) 2000-2012 Bharat Mediratta
 *
 * 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.
 */
class CalendarView_Controller extends Controller {
  public function calendar($display_year="", $display_user="-1") {
    // Draw a calendar for the year specified by $display_year.

    // Display the current year by default if a year wasn't provided.
    if ($display_year == "") {
      $display_year = date('Y');
    }

    // Draw the page.
    $root = item::root();
    $template = new Theme_View("page.html", "other", "CalendarView");
    $template->set_global(
      array("calendar_user" => $display_user,
            "breadcrumbs" => array(
              Breadcrumb::instance($root->title, $root->url())->set_first(),
              Breadcrumb::instance($display_year, url::site("calendarview/calendar/" . $display_year))->set_last())));
    $template->page_title = t("Gallery :: Calendar");
    $template->content = new View("calendarview_year.html");
    $template->content->calendar_year = $display_year;
    $template->content->calendar_user = $display_user;
    $template->content->calendar_user_year_form = $this->_get_calenderprefs_form($display_year, $display_user);
    $template->content->title = t("Calendar") . ": " . $display_year;
    print $template;
  }

  public function day($display_year, $display_user, $display_month, $display_day) {
    // Display all images for the specified day.

    // Set up default search conditions for retrieving all photos from the specified day.
    $where = array(array("type", "!=", "album"));
    if ($display_user != "-1") {
      $where[] = array("owner_id", "=", $display_user);
    }
    $where[] = array("captured", ">=", mktime(0, 0, 0, $display_month, $display_day, $display_year));
    $where[] = array("captured", "<", mktime(0, 0, 0, $display_month, ($display_day + 1), $display_year));

    // Figure out the total number of photos to display.
    $day_count = calendarview::get_items_count($where);

    // Figure out paging stuff.
    $page_size = module::get_var("gallery", "page_size", 9);
    $page = (int) Input::instance()->get("page", "1");
    $offset = ($page-1) * $page_size;
    $max_pages = max(ceil($day_count / $page_size), 1);

    // Make sure that the page references a valid offset
    if (($page < 1) || ($page > $max_pages)) {
      throw new Kohana_404_Exception();
    }

    // Figure out which photos go on this page.
    $children = calendarview::get_items($page_size, $offset, $where);

    // Create and display the page.
    $root = item::root();
    $template = new Theme_View("page.html", "collection", "CalendarDayView");
    $template->set_global(
      array("page" => $page,
            "max_pages" => $max_pages,
            "page_size" => $page_size,
            "children" => $children,
            "breadcrumbs" => array(
              Breadcrumb::instance($root->title, $root->url())->set_first(),
              Breadcrumb::instance($display_year, url::site("calendarview/calendar/" . $display_year . "/" . $display_user)),
              Breadcrumb::instance(t(date("F", mktime(0, 0, 0, $display_month, $display_day, $display_year))), url::site("calendarview/month/" . $display_year . "/" . $display_user . "/" . $display_month)),
              Breadcrumb::instance($display_day, url::site("calendarview/month/" . $display_year . "/" . $display_user . "/" . $display_month . "/" . $display_day))->set_last()),
            "children_count" => $day_count));
    $template->page_title = t("Gallery :: Calendar");
    $template->content = new View("dynamic.html");
    $template->content->title = t("Photos From ") . date("d", mktime(0, 0, 0, $display_month, $display_day, $display_year)) . " " . t(date("F", mktime(0, 0, 0, $display_month, $display_day, $display_year))) . " " . date("Y", mktime(0, 0, 0, $display_month, $display_day, $display_year));
    print $template;

    // Set breadcrumbs on the photo pages to point back to the calendar day view.
    item::set_display_context_callback("CalendarView_Controller::get_display_day_context", $display_user, $display_year, $display_month, $display_day);
  }

  static function get_display_day_context($item, $display_user, $display_year, $display_month, $display_day) {
    // Set up default search conditions for retrieving all photos from the specified day.
    $where = array(array("type", "!=", "album"));
    if ($display_user != "-1") {
      $where[] = array("owner_id", "=", $display_user);
    }
    $where[] = array("captured", ">=", mktime(0, 0, 0, $display_month, $display_day, $display_year));
    $where[] = array("captured", "<", mktime(0, 0, 0, $display_month, ($display_day + 1), $display_year));			  

    // Generate breadcrumbs for the photo page.
    $root = item::root();
    $breadcrumbs = array(
      Breadcrumb::instance($root->title, $root->url())->set_first(),
      Breadcrumb::instance($display_year, url::site("calendarview/calendar/" . $display_year . "/" . $display_user)),
      Breadcrumb::instance(t(date("F", mktime(0, 0, 0, $display_month, $display_day, $display_year))), url::site("calendarview/month/" . $display_year . "/" . $display_user . "/" . $display_month)),
      Breadcrumb::instance($display_day, url::site("calendarview/month/" . $display_year . "/" . $display_user . "/" . $display_month . "/" . $display_day)),
      Breadcrumb::instance($item->title, $item->url())->set_last()
    );

    return CalendarView_Controller::get_display_context($item, $where, $breadcrumbs);
  }

  public function month($display_year, $display_user, $display_month) {
    // Display all images for the specified month.

    // Set up default search conditions for retrieving all photos from the specified month.
    $where = array(array("type", "!=", "album"));
    if ($display_user != "-1") {
      $where[] = array("owner_id", "=", $display_user);
    }
    $where[] = array("captured", ">=", mktime(0, 0, 0, $display_month, 1, $display_year));
    $where[] = array("captured", "<", mktime(0, 0, 0, $display_month+1, 1, $display_year));

    // Figure out the total number of photos to display.
    $day_count = calendarview::get_items_count($where);

    // Figure out paging stuff.
    $page_size = module::get_var("gallery", "page_size", 9);
    $page = (int) Input::instance()->get("page", "1");
    $offset = ($page-1) * $page_size;
    $max_pages = max(ceil($day_count / $page_size), 1);

    // Make sure that the page references a valid offset
    if (($page < 1) || ($page > $max_pages)) {
      throw new Kohana_404_Exception();
    }

    // Figure out which photos go on this page.
    $children = calendarview::get_items($page_size, $offset, $where);

    // Create and display the page.
    $root = item::root();
    $template = new Theme_View("page.html", "collection", "CalendarMonthView");
    $template->set_global(
      array("page" => $page,
            "max_pages" => $max_pages,
            "page_size" => $page_size,
            "breadcrumbs" => array(
              Breadcrumb::instance($root->title, $root->url())->set_first(),
              Breadcrumb::instance($display_year, url::site("calendarview/calendar/" . $display_year . "/" . $display_user)),
              Breadcrumb::instance(t(date("F", mktime(0, 0, 0, $display_month, 1, $display_year))), url::site("calendarview/month/" . $display_year . "/" . $display_user . "/" . $display_month))->set_last()),
            "children" => $children,
            "children_count" => $day_count));
    $template->page_title = t("Gallery :: Calendar");
    $template->content = new View("dynamic.html");
    $template->content->title = t("Photos From ") . t(date("F", mktime(0, 0, 0, $display_month, 1, $display_year))) . " " . date("Y", mktime(0, 0, 0, $display_month, 1, $display_year));
    print $template;

    // Set up breadcrumbs for the photo pages to point back to the calendar month view.
    item::set_display_context_callback("CalendarView_Controller::get_display_month_context", $display_user, $display_year, $display_month);
  }

  static function get_display_month_context($item, $display_user, $display_year, $display_month) {
    // Set up default search conditions for retrieving all photos from the specified month.
    $where = array(array("type", "!=", "album"));
    if ($display_user != "-1") {
      $where[] = array("owner_id", "=", $display_user);
    }
    $where[] = array("captured", ">=", mktime(0, 0, 0, $display_month, 1, $display_year));
    $where[] = array("captured", "<", mktime(0, 0, 0, $display_month+1, 1, $display_year));

    // Generate breadcrumbs for the photo page.
    $root = item::root();
    $breadcrumbs = array(
      Breadcrumb::instance($root->title, $root->url())->set_first(),
      Breadcrumb::instance($display_year, url::site("calendarview/calendar/" . $display_year . "/" . $display_user)),
      Breadcrumb::instance(t(date("F", mktime(0, 0, 0, $display_month, 1, $display_year))), url::site("calendarview/month/" . $display_year . "/" . $display_user . "/" . $display_month)),
      Breadcrumb::instance($item->title, $item->url())->set_last()
    );

    return CalendarView_Controller::get_display_context($item, $where, $breadcrumbs);
  }

  private function get_display_context($item, $where=array(), $breadcrumbs=array()) {
    // Set up previous / next / breadcrumbs / etc to point to CalendarView instead of the album.

    // Figure out the photo's position.
    $position = calendarview::get_position($item, $where);

    // Figure out the previous and next items.
    if ($position > 1) {
      list ($previous_item, $ignore, $next_item) = calendarview::get_items(3, $position - 2, $where);
    } else {
      list ($next_item) = calendarview::get_items(1, $position, $where);
    }

    // Figure out the total number of photos.
    $sibling_count = calendarview::get_items_count($where);

    return array("position" => $position,
                 "previous_item" => $previous_item,
                 "next_item" => $next_item,
                 "sibling_count" => $sibling_count,
                 "breadcrumbs" => $breadcrumbs);
  }

  private function _get_calenderprefs_form($display_year, $display_user) {
    // Generate a form to allow the visitor to select a year and a gallery photo owner.
    $calendar_group = new Forge("calendarview/setprefs", "", "post",
                      array("id" => "g-view-calendar-form"));

    // Generate a list of all Gallery users who have uploaded photos.
    $valid_users[-1] = "(All Users)";
    $gallery_users = ORM::factory("user")->find_all();
    foreach ($gallery_users as $one_user) {
      $count = ORM::factory("item")
               ->viewable()
               ->where("owner_id", "=", $one_user->id)
               ->where("type", "!=", "album")
               ->where("captured", "!=", "")
               ->find_all()
               ->count();
      if ($count > 0) {
        $valid_users[$one_user->id] = $one_user->full_name;
      }
    }

    // Generate a list of years, starting with the year the earliest photo was
    //   taken, and ending with the year of the most recent photo.
    $valid_years = Array();
    if ($display_user == -1) {
      $all_photos = ORM::factory("item")
        ->viewable()
        ->where("type", "!=", "album")
        ->where("captured", "!=", "")
        ->order_by("captured", "DESC")
        ->find_all();
      $counter = date('Y', $all_photos[count($all_photos)-1]->captured);
      while ($counter <= date('Y', $all_photos[0]->captured)) {
        $valid_years[$counter] = $counter;
        $counter++;
      }
    } else {
      $all_photos = ORM::factory("item")
        ->viewable()
        ->where("type", "!=", "album")
        ->where("captured", "!=", "")
        ->where("owner_id", "=", $display_user)
        ->order_by("captured", "DESC")
        ->find_all();
      $counter = date('Y', $all_photos[count($all_photos)-1]->captured);
      while ($counter <= date('Y', $all_photos[0]->captured)) {
        $valid_years[$counter] = $counter;
        $counter++;
      }
    }

    // Create the form.
    $calendar_group->dropdown('cal_user')
                   ->label(t("Display Photos From User: "))
                   ->id('cal_user')
                   ->options($valid_users)
                   ->selected($display_user);
    $calendar_group->dropdown('cal_year')
                   ->label(t("For Year: "))
                   ->id('cal_year')
                   ->options($valid_years)
                   ->selected($display_year);

    // Add a save button to the form.
    $calendar_group->submit("SaveSettings")->value(t("Go"))->id('cal_go');

    // Return the newly generated form.
    return $calendar_group;
  }

  public function setprefs() {
    // Change the calendar year and / or user.

    // Prevent Cross Site Request Forgery
    access::verify_csrf();

    // Get user specified settings.
    $str_user_id = Input::instance()->post("cal_user");
    $str_year_id = Input::instance()->post("cal_year");

    // redirect to the currect page.
    url::redirect(url::site("calendarview/calendar/" . $str_year_id . "/" . $str_user_id, request::protocol()));
  }
}