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