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<?php
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/**
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* @file
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* Definition of views_handler_argument_formula.
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*/
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/**
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* Abstract argument handler for simple formulae.
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*
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* Child classes of this object should implement summary_argument, at least.
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*
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* Definition terms:
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* - formula: The formula to use for this handler.
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*
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* @ingroup views_argument_handlers
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*/
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class views_handler_argument_formula extends views_handler_argument {
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var $formula = NULL;
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/**
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* Constructor
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*/
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function construct() {
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parent::construct();
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if (!empty($this->definition['formula'])) {
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$this->formula = $this->definition['formula'];
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}
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}
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function get_formula() {
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return str_replace('***table***', $this->table_alias, $this->formula);
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}
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/**
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* Build the summary query based on a formula
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*/
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function summary_query() {
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$this->ensure_my_table();
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// Now that our table is secure, get our formula.
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$formula = $this->get_formula();
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// Add the field.
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$this->base_alias = $this->name_alias = $this->query->add_field(NULL, $formula, $this->field);
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$this->query->set_count_field(NULL, $formula, $this->field);
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return $this->summary_basics(FALSE);
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}
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/**
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* Build the query based upon the formula
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*/
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function query($group_by = FALSE) {
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$this->ensure_my_table();
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// Now that our table is secure, get our formula.
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$placeholder = $this->placeholder();
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$formula = $this->get_formula() .' = ' . $placeholder;
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$placeholders = array(
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$placeholder => $this->argument,
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);
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$this->query->add_where(0, $formula, $placeholders, 'formula');
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}
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}
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