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<?php
class quiz_views_handler_filter_quiz_nid extends views_handler_filter {
var $corresponding_vids = array();
var $group_by;
var $group_by_table;
var $secondary_group_by;
var $secondary_table;
var $secondary_table_alias;
var $secondary_tables = array(
'none' => array(
'secondary_group_by' => 'nid',
'secondary_table' => 'quiz_node_results',
'secondary_vid' => 'vid',
'secondary_nid' => 'nid',
),
'results' => array(
'secondary_group_by' => 'uid',
'secondary_table' => 'quiz_node_results',
'secondary_vid' => 'vid',
'secondary_nid' => 'nid',
),
'questions' => array(
'secondary_group_by' => 'child_nid',
'secondary_table' => 'quiz_node_relationship',
'secondary_vid' => 'parent_vid',
'secondary_nid' => 'parent_nid',
),
);
function construct() {
parent::construct();
$this->vid_field = !empty($this->definition['vid field']) ? $this->definition['vid field'] : 'vid';
$this->group_by = $this->definition['group by'];
if (!empty($this->definition['secondary group by'])) {
$this->secondary_group_by = $this->definition['secondary group by'];
}
}
function can_expose() {
return FALSE;
}
function option_definition() {
$options = parent::option_definition();
$options['which_vid'] = array(
'default' => 'latest',
);
$options['secondary'] = array(
'default' => 'none',
);
return $options;
}
function options_form(&$form, &$form_state) {
parent::options_form($form, $form_state);
$form['which_vid'] = array(
'#type' => 'select',
'#title' => t('Quiz revision(s) to use'),
'#options' => array(
'latest' => t('Latest: most recent version of the quiz ONLY.'),
'initial' => t('Initial: original version of the quiz ONLY.'),
),
'#description' => t('The filter will limit score results for a particular quiz node id(s) into one or more quiz node revision ids, depending on your selection.'),
'#default_value' => $this->options['which_vid'],
);
$tables = array(
'none' => t('None'),
);
$tables['results'] = t('Use Quiz Results');
$tables['questions'] = t('Use Quiz Questions');
$form['secondary'] = array(
'#type' => 'radios',
'#title' => t('Secondary Grouping'),
'#options' => $tables,
'#default_value' => $this->options['secondary'],
'#description' => t('If you are looking to generate a list of either quiz questions or quiz results, you must select the appropriate option from this list.'),
);
}
function value_submit($form, &$form_state) {
$form_state['values']['options']['secondaries'] = $this->secondary_tables[$form_state['values']['options']['secondary']];
}
function query() {
$this
->ensure_my_table();
foreach ($this->options['secondaries'] as $key => $value) {
if (!is_null($value)) {
$this->{$key} = $value;
}
}
$this->group_by_table = !empty($this->definition['group by table']) ? $this->query
->ensure_table($this->definition['group by table']) : $this->table_alias;
$this->query
->add_groupby("{$this->table_alias}.{$this->field}");
$this->query
->add_groupby("{$this->table_alias}.{$this->vid_field}");
if (!empty($this->secondary_group_by)) {
$this->secondary_table_alias = $this->query
->ensure_table($this->secondary_table);
$this->query
->add_groupby("{$this->secondary_table_alias}.{$this->secondary_group_by}");
}
$this->query
->add_where(0, "{$this->secondary_table_alias}.{$this->secondary_vid} = ({$this->subselect()})");
}
function subselect() {
$operation = $this->options['which_vid'] == 'initial' ? 'MIN' : 'MAX';
$subalias = $this->secondary_table_alias . '__subselect';
$subselect = "SELECT {$operation}({$subalias}.{$this->secondary_vid}) FROM ";
$subselect .= '{' . $this->secondary_table . "} {$subalias} WHERE ";
$subselect .= "{$subalias}.{$this->secondary_group_by} = {$this->secondary_table_alias}.{$this->secondary_group_by} AND ";
$subselect .= "{$subalias}.{$this->secondary_nid} = {$this->secondary_table_alias}.{$this->secondary_nid}";
return $subselect;
}
}