class date_views_plugin_pager in Date 7.2

Same name and namespace in other branches

8 date_views/includes/date_views_plugin_pager.inc \date_views_plugin_pager
7.3 date_views/includes/date_views_plugin_pager.inc \date_views_plugin_pager

Views pager plugin to page by month.

Hierarchy

class \views_object
- class \views_plugin
  - class \views_plugin_pager
    class \date_views_plugin_pager

Expanded class hierarchy of date_views_plugin_pager

1 string reference to 'date_views_plugin_pager'

date_views_views_plugins in date_views/includes/date_views.views.inc: Implements hook_views_plugins().

File

date_views/includes/date_views_plugin_pager.inc, line 61: Date pager.

View source

class date_views_plugin_pager extends views_plugin_pager {

  /**
   * {@inheritdoc}
   */
  public function use_count_query() {
    return FALSE;
  }

  /**
   * {@inheritdoc}
   */
  public function has_more_records() {
    return FALSE;
  }

  /**
   * {@inheritdoc}
   */
  public function summary_title() {
    return t("Position: @position, format: @format.", array(
      '@position' => $this->options['pager_position'],
      '@format' => $this->options['link_format'],
    ));
  }

  /**
   * {@inheritdoc}
   */
  public function option_definition() {
    $options = parent::option_definition();
    $options['date_id'] = array(
      'default' => 'date',
    );
    $options['pager_position'] = array(
      'default' => 'top',
    );
    $options['link_format'] = array(
      'default' => 'pager',
    );
    $options['date_argument'] = array(
      'default' => 'Unknown',
    );
    $options['granularity'] = array(
      'default' => 'Unknown',
    );
    $options['skip_empty_pages'] = array(
      'default' => FALSE,
    );
    return $options;
  }

  /**
   * {@inheritdoc}
   */
  public function options_form(&$form, &$form_state) {
    $form['markup']['#markup'] = t('This pager works together with a Date or Content date field contextual filter. If a Date filter has been added to the view, this pager will provide back/next paging to match the granularity of that filter (i.e. paging by year, month, week, or day). The filter must also be configured to use a DATE default value. If there is no Date contextual filter on this view, or if it has not been set to use a default date, the pager will not appear.');
    $form['date_id'] = array(
      '#title' => t('Date identifier'),
      '#type' => 'textfield',
      '#description' => t('The query identifier to use when fetching date data from in the URL. Note that if you have more than one display in the same view that uses the date pager (like a page and a block), the pager id must be different for each one or both will change when the pager value changes.'),
      '#default_value' => $this->options['date_id'],
      '#required' => TRUE,
    );
    $form['pager_position'] = array(
      '#title' => t('Pager position'),
      '#type' => 'select',
      '#options' => array(
        'bottom' => t('Bottom'),
        'top' => t('Top'),
        'both' => t('Both'),
      ),
      '#description' => t('Where to place the date pager, on the top, bottom, or both top and bottom of the content.'),
      '#default_value' => $this->options['pager_position'],
      '#required' => TRUE,
    );
    $form['link_format'] = array(
      '#title' => t('Link format'),
      '#type' => 'select',
      '#options' => array(
        'pager' => t('Pager'),
        'clean' => t('Clean URL'),
      ),
      '#description' => t("The format for pager link urls. With the Pager format, the links look like 'calendar/?date=2020-05'. The Clean URL format links look like 'calendar/2020-05'. The Clean format links look nicer but the Pager format links are likely to work better if the calendar is used in blocks or panels."),
      '#default_value' => $this->options['link_format'],
      '#required' => TRUE,
    );
    $form['skip_empty_pages'] = array(
      '#title' => t('Skip empty pages'),
      '#type' => 'checkbox',
      '#description' => t('When selected, the pager will not display pages with no result for the given date. This causes a slight performance degradation because two additional queries need to be executed.'),
      '#default_value' => $this->options['skip_empty_pages'],
    );
    $form['date_argument']['#type'] = 'hidden';
    $form['date_argument']['#value'] = $this->options['date_argument'];
    $form['granularity']['#type'] = 'hidden';
    $form['granularity']['#value'] = $this->options['granularity'];
  }

  /**
   * {@inheritdoc}
   */
  public function query() {

    // By fetching our data from the exposed input, it is possible to feed
    // pager data through some method other than $_GET.
    $input = $this->view
      ->get_exposed_input();
    $value = NULL;
    if (!empty($input) && !empty($input[$this->options['date_id']])) {
      $value = $input[$this->options['date_id']];
    }

    // Bring the argument information into the view so our theme can access it.
    $i = 0;
    foreach ($this->view->argument as $id => &$argument) {
      if (date_views_handler_is_date($argument, 'argument')) {

        // If the argument is empty, nothing to do. This could be from an
        // argument that does not set a default value.
        if (empty($argument->argument) || empty($argument->date_handler)) {
          continue;
        }

        // Storing this information in the pager so it's available for summary
        // info. The view argument information is not otherwise accessible to
        // the pager. Not working right yet, tho.
        $date_handler = $argument->date_handler;
        $this->options['date_argument'] = $id;
        $this->options['granularity'] = $argument->date_handler->granularity;

        // Reset values set by argument if pager requires it.
        if (!empty($value)) {
          $this
            ->set_argument_value($argument, $value);
        }

        // The pager value might move us into a forbidden range, so test it.
        if ($this
          ->date_forbid($argument)) {
          $this->view->build_info['fail'] = TRUE;
          return;
        }

        // Write date_info to store information to be used in the theming
        // functions.
        if (empty($this->view->date_info)) {
          $this->view->date_info = new stdClass();
        }
        $this->view->date_info->granularity = $argument->date_handler->granularity;
        $format = $this->view->date_info->granularity == 'week' ? DATE_FORMAT_DATETIME : $argument->sql_format;
        $this->view->date_info->placeholders = isset($argument->placeholders) ? $argument->placeholders : $argument->date_handler->placeholders;
        $this->view->date_info->date_arg = $argument->argument;
        $this->view->date_info->date_arg_pos = $i;
        $this->view->date_info->limit = $argument->limit;
        $this->view->date_info->url = $this->view
          ->get_url();
        $this->view->date_info->pager_id = $this->options['date_id'];
        $this->view->date_info->date_pager_position = $this->options['pager_position'];
        $this->view->date_info->date_pager_format = $this->options['link_format'];
        $this->view->date_info->skip_empty_pages = $this->options['skip_empty_pages'] == 1;

        // Execute two additional queries to find the previous and next page
        // with values.
        if ($this->view->date_info->skip_empty_pages) {
          $q = clone $argument->query;
          $field = $argument->table_alias . '.' . $argument->real_field;
          $fieldsql = $date_handler
            ->sql_field($field);
          $fieldsql = $date_handler
            ->sql_format($format, $fieldsql);
          $q
            ->clear_fields();
          $q->orderby = array();
          $q
            ->set_distinct(TRUE, TRUE);

          // Date limits of this argument.
          $datelimits = $argument->date_handler
            ->arg_range($argument->limit[0] . '--' . $argument->limit[1]);

          // Find the first two dates between the minimum date and the upper
          // bound of the current value.
          $q
            ->add_orderby(NULL, $fieldsql, 'DESC', 'date');
          $this
            ->set_argument_placeholders($this->view->date_info->placeholders, $datelimits[0], $argument->max_date, $q, $format);
          $compiledquery = $q
            ->query();
          $compiledquery
            ->range(0, 2);
          $results = $compiledquery
            ->execute()
            ->fetchCol(0);
          $prevdate = array_shift($results);
          $prevdatealt = array_shift($results);

          // Find the first two dates between the lower bound
          // of the current value and the maximum date.
          $q
            ->add_orderby(NULL, $fieldsql, 'ASC', 'date');
          $this
            ->set_argument_placeholders($this->view->date_info->placeholders, $argument->min_date, $datelimits[1], $q, $format);
          $compiledquery = $q
            ->query();
          $compiledquery
            ->range(0, 2);
          $results = $compiledquery
            ->execute()
            ->fetchCol(0);
          $nextdate = array_shift($results);
          $nextdatealt = array_shift($results);

          // Set the default value of the query to $prevfirst or $nextfirst
          // when there is no value and $prevsecond or $nextsecond is set.
          if (empty($value)) {

            // @todo find out which of $prevdate or $nextdate is closest to the
            // default argument date value and choose that one.
            if ($prevdate && $prevdatealt) {
              $this
                ->set_argument_value($argument, $prevdate);
              $value = $prevdate;
              $prevdate = $prevdatealt;

              // If the first next date is the same as the first previous date,
              // move to the following next date.
              if ($value == $nextdate) {
                $nextdate = $nextdatealt;
                $nextdatealt = NULL;
              }
            }
            elseif ($nextdate && $nextdatealt) {
              $this
                ->set_argument_value($argument, $nextdate);
              $value = $nextdate;
              $nextdate = $nextdatealt;

              // If the first previous date is the same as the first next date,
              // move to the following previous date.
              if ($value == $prevdate) {
                $prevdate = $prevdatealt;
                $prevdatealt = NULL;
              }
            }
          }
          else {

            // $prevdate and $nextdate are the same as $value, so move to the
            // next values.
            $prevdate = $prevdatealt;
            $nextdate = $nextdatealt;
          }
          $this->view->date_info->prev_date = $prevdate ? new DateObject($prevdate, NULL, $format) : NULL;
          $this->view->date_info->next_date = $nextdate ? new DateObject($nextdate, NULL, $format) : NULL;
        }
        else {
          $this->view->date_info->prev_date = clone $argument->min_date;
          date_modify($this->view->date_info->prev_date, '-1 ' . $argument->date_handler->granularity);
          $this->view->date_info->next_date = clone $argument->min_date;
          date_modify($this->view->date_info->next_date, '+1 ' . $argument->date_handler->granularity);
        }

        // Write the date_info properties that depend on the current value.
        $this->view->date_info->year = date_format($argument->min_date, 'Y');
        $this->view->date_info->month = date_format($argument->min_date, 'n');
        $this->view->date_info->day = date_format($argument->min_date, 'j');
        $this->view->date_info->week = date_week(date_format($argument->min_date, DATE_FORMAT_DATE));
        $this->view->date_info->date_range = $argument->date_range;
        $this->view->date_info->min_date = $argument->min_date;
        $this->view->date_info->max_date = $argument->max_date;
      }
      $i++;
    }

    // Is this a view that needs to be altered based on a pager value? If there
    // is pager input and the argument has set the placeholders, swap the pager
    // value in for the placeholder set by the argument.
    if (!empty($value) && !empty($this->view->date_info->placeholders)) {
      $this
        ->set_argument_placeholders($this->view->date_info->placeholders, $this->view->date_info->min_date, $this->view->date_info->max_date, $this->view->query, $format);
    }
  }

  /**
   * {@inheritdoc}
   */
  public function set_argument_value($argument, $value) {
    $argument->argument = $value;
    $argument->date_range = $argument->date_handler
      ->arg_range($value);
    $argument->min_date = $argument->date_range[0];
    $argument->max_date = $argument->date_range[1];

    // $argument->is_default works correctly for normal arguments, but does not
    // work correctly if we are swapping in a new value from the pager.
    $argument->is_default = FALSE;
  }

  /**
   * {@inheritdoc}
   */
  public function set_argument_placeholders($placeholders, $mindate, $maxdate, $query, $format) {
    $count = count($placeholders);
    foreach ($query->where as $group => $data) {
      foreach ($data['conditions'] as $delta => $condition) {
        if (array_key_exists('value', $condition) && is_array($condition['value'])) {
          foreach ($condition['value'] as $placeholder => $placeholder_value) {
            if (array_key_exists($placeholder, $placeholders)) {

              // If we didn't get a match, this is a > $min < $max query that
              // uses the view min and max dates as placeholders.
              $date = $count == 2 ? $mindate : $maxdate;
              $next_placeholder = array_shift($placeholders);
              $query->where[$group]['conditions'][$delta]['value'][$placeholder] = $date
                ->format($format);
              $count--;
            }
          }
        }
      }
    }
  }

  /**
   * Determine if we have moved outside the valid date range for this argument.
   */
  public function date_forbid($argument) {

    // See if we're outside the allowed date range for our argument.
    $limit = date_range_years($argument->options['year_range']);
    if (date_format($argument->min_date, 'Y') < $limit[0] || date_format($argument->max_date, 'Y') > $limit[1]) {
      return TRUE;
    }
    return FALSE;
  }

  /**
   * {@inheritdoc}
   */
  public function pre_render(&$result) {

    // Load theme functions for the pager.
    module_load_include('inc', 'date_views', 'theme/theme');
  }

  /**
   * {@inheritdoc}
   */
  public function render($input) {

    // This adds all of our template suggestions based upon the view name and
    // display id.
    $pager_theme = views_theme_functions('date_views_pager', $this->view, $this->display);
    return theme($pager_theme, array(
      'plugin' => $this,
      'input' => $input,
    ));
  }

}

Members

Name	Modifiers	Type	Description	Overrides
date_views_plugin_pager::date_forbid	public	function	Determine if we have moved outside the valid date range for this argument.
date_views_plugin_pager::has_more_records	public	function	Determine if there are more records available. Overrides views_plugin_pager::has_more_records
date_views_plugin_pager::options_form	public	function	Provide a form to edit options for this plugin. Overrides views_plugin::options_form
date_views_plugin_pager::option_definition	public	function	Information about options for all kinds of purposes will be held here. Overrides views_object::option_definition
date_views_plugin_pager::pre_render	public	function	Perform any needed actions just before rendering. Overrides views_plugin_pager::pre_render
date_views_plugin_pager::query	public	function	Modify the query for paging Overrides views_plugin_pager::query
date_views_plugin_pager::render	public	function	Render the pager. Overrides views_plugin_pager::render
date_views_plugin_pager::set_argument_placeholders	public	function
date_views_plugin_pager::set_argument_value	public	function
date_views_plugin_pager::summary_title	public	function	Return a string to display as the clickable title for the pager plugin. Overrides views_plugin_pager::summary_title
date_views_plugin_pager::use_count_query	public	function	Determine if a pager needs a count query. Overrides views_plugin_pager::use_count_query
views_object::$definition	public	property	Handler's definition.
views_object::$options	public	property	Except for displays, options for the object will be held here.	1
views_object::altered_option_definition		function	Collect this handler's option definition and alter them, ready for use.
views_object::construct	public	function	Views handlers use a special construct function.	4
views_object::destroy	public	function	Destructor.	2
views_object::export_option	public	function		1
views_object::export_options	public	function
views_object::export_option_always	public	function	Always exports the option, regardless of the default value.
views_object::options Deprecated	public	function	Set default options on this object.	1
views_object::set_default_options	public	function	Set default options.
views_object::set_definition	public	function	Let the handler know what its full definition is.
views_object::unpack_options	public	function	Unpack options over our existing defaults, drilling down into arrays so that defaults don't get totally blown away.
views_object::unpack_translatable	public	function	Unpack a single option definition.
views_object::unpack_translatables	public	function	Unpacks each handler to store translatable texts.
views_object::_set_option_defaults	public	function
views_plugin::$display	public	property	The current used views display.
views_plugin::$plugin_name	public	property	The plugin name of this plugin, for example table or full.
views_plugin::$plugin_type	public	property	The plugin type of this plugin, for example style or query.
views_plugin::$view	public	property	The top object of a view. Overrides views_object::$view	1
views_plugin::additional_theme_functions	public	function	Provide a list of additional theme functions for the theme info page.
views_plugin::plugin_title	public	function	Return the human readable name of the display.
views_plugin::theme_functions	public	function	Provide a full list of possible theme templates used by this style.
views_plugin::validate	public	function	Validate that the plugin is correct and can be saved.	3
views_plugin_pager::$current_page	public	property
views_plugin_pager::$total_items	public	property
views_plugin_pager::execute_count_query	public	function	Execute the count query, which will be done just prior to the query itself being executed.	1
views_plugin_pager::exposed_form_alter	public	function		1
views_plugin_pager::exposed_form_submit	public	function
views_plugin_pager::exposed_form_validate	public	function		1
views_plugin_pager::get_current_page	public	function	Get the current page.
views_plugin_pager::get_items_per_page	public	function	Get how many items per page this pager will display.	1
views_plugin_pager::get_offset	public	function	Get the page offset, or how many items to skip.
views_plugin_pager::get_pager_id	public	function	Get the pager id, if it exists.
views_plugin_pager::get_total_items	public	function	Get the total number of items.
views_plugin_pager::init	public	function	Initialize the plugin.	1
views_plugin_pager::items_per_page_exposed	public	function		1
views_plugin_pager::offset_exposed	public	function		1
views_plugin_pager::options_submit	public	function	Provide the default form form for submitting options. Overrides views_plugin::options_submit
views_plugin_pager::options_validate	public	function	Provide the default form form for validating options. Overrides views_plugin::options_validate	1
views_plugin_pager::post_execute	public	function	Perform any needed actions just after the query executing.	1
views_plugin_pager::pre_execute	public	function	Perform any needed actions just prior to the query executing.
views_plugin_pager::set_current_page	public	function	Set the current page.	1
views_plugin_pager::set_items_per_page	public	function	Set how many items per page this pager will display.
views_plugin_pager::set_offset	public	function	Set the page offset, or how many items to skip.
views_plugin_pager::update_page_info	public	function	If there are pagers that need global values set, this method can be used to set them. It will be called when the count query is run.	1
views_plugin_pager::uses_exposed	public	function		1
views_plugin_pager::use_pager	public	function	Determine if this pager actually uses a pager.	2

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class date_views_plugin_pager in Date 7.2

Hierarchy

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