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   1  <?php
   2  // $Id: views_handler_argument_formula.inc,v 1.1 2008/09/03 19:21:28 merlinofchaos Exp $
   3  /**
   4   * Abstract argument handler for simple formulae.
   5   *
   6   * Child classes of this object should implement summary_argument, at least.
   7   *
   8   * Definition terms:
   9   * - formula: The formula to use for this handler.
  10   *
  11   * @ingroup views_argument_handlers
  12   */
  13  class views_handler_argument_formula extends views_handler_argument {
  14    var $formula = NULL;
  15    /**
  16     * Constructor
  17     */
  18    function construct() {
  19      parent::construct();
  20  
  21      if (!empty($this->definition['formula'])) {
  22        $this->formula = $this->definition['formula'];
  23      }
  24    }
  25  
  26    function get_formula() {
  27      return str_replace('***table***', $this->table_alias, $this->formula);
  28    }
  29  
  30    /**
  31     * Build the summary query based on a formula
  32     */
  33    function summary_query() {
  34      $this->ensure_my_table();
  35      // Now that our table is secure, get our formula.
  36      $formula = $this->get_formula();
  37  
  38      // Add the field.
  39      $this->base_alias = $this->name_alias = $this->query->add_field(NULL, $formula, $this->field);
  40      $this->query->set_count_field(NULL, $formula, $this->field);
  41  
  42      return $this->summary_basics(FALSE);
  43    }
  44  
  45    /**
  46     * Build the query based upon the formula
  47     */
  48    function query() {
  49      $this->ensure_my_table();
  50      // Now that our table is secure, get our formula.
  51      $formula = $this->get_formula();
  52  
  53      $this->query->add_where(0, "$formula = '%s'", $this->argument);
  54    }
  55  }