function views_aggregator_expression in Views Aggregator Plus 7

Aggregates a field in the column aggregation row as a math. expression.

Parameters

array $groups: An array of groups of rows, each group indexed by group value.

object $field_handler: The handler for the view column to evaluate the expression for.

string $group_exp: Currently not supported.

string $column_exp: An optional regexp to count, if omitted all non-empty group values count.

Return value

array An array of values, one for each group and one for the column.

File

./views_aggregator_functions.inc, line 373

views_aggregator_functions.inc

Code

function views_aggregator_expression($groups, $field_handler, $group_exp = NULL, $column_exp = NULL) {
  $values = array();
  ctools_include('math-expr');

  // This is meaningful only if some other column aggregation function took
  // place before this one.
  $this_item = array(
    'raw' => array(
      'value' => $field_handler->last_render,
    ),
  );

  // Based on views_handler_field_math::render()
  $tokens = array_map('floatval', $field_handler
    ->get_render_tokens($this_item));
  $value = strtr($column_exp, $tokens);
  $expressions = explode(';', $value);
  $math = new ctools_math_expr();
  foreach ($expressions as $expression) {
    if ($expression !== '') {
      $value = $math
        ->evaluate($expression);
    }
  }

  // Should we call: number_format($value, $precision, $decimal, $separator) ?
  $values['column'] = $value;
  return $values;
}