class views_handler_filter_numeric

class views_handler_filter_numeric extends views_handler_filter {
    
    /**
     * Exposed filter options.
     */
    public $always_multiple = TRUE;
    
    /**
     * {@inheritdoc}
     */
    public function option_definition() {
        $options = parent::option_definition();
        $options['value'] = array(
            'contains' => array(
                'min' => array(
                    'default' => '',
                ),
                'max' => array(
                    'default' => '',
                ),
                'value' => array(
                    'default' => '',
                ),
            ),
        );
        return $options;
    }
    
    /**
     * {@inheritdoc}
     */
    public function operators() {
        $operators = array(
            '<' => array(
                'title' => t('Is less than'),
                'method' => 'op_simple',
                'short' => t('<'),
                'values' => 1,
            ),
            '<=' => array(
                'title' => t('Is less than or equal to'),
                'method' => 'op_simple',
                'short' => t('<='),
                'values' => 1,
            ),
            '=' => array(
                'title' => t('Is equal to'),
                'method' => 'op_simple',
                'short' => t('='),
                'values' => 1,
            ),
            '!=' => array(
                'title' => t('Is not equal to'),
                'method' => 'op_simple',
                'short' => t('!='),
                'values' => 1,
            ),
            '>=' => array(
                'title' => t('Is greater than or equal to'),
                'method' => 'op_simple',
                'short' => t('>='),
                'values' => 1,
            ),
            '>' => array(
                'title' => t('Is greater than'),
                'method' => 'op_simple',
                'short' => t('>'),
                'values' => 1,
            ),
            'between' => array(
                'title' => t('Is between'),
                'method' => 'op_between',
                'short' => t('between'),
                'values' => 2,
            ),
            'not between' => array(
                'title' => t('Is not between'),
                'method' => 'op_between',
                'short' => t('not between'),
                'values' => 2,
            ),
        );
        // If the definition allows for the empty operator, add it.
        if (!empty($this->definition['allow empty'])) {
            $operators += array(
                'empty' => array(
                    'title' => t('Is empty (NULL)'),
                    'method' => 'op_empty',
                    'short' => t('empty'),
                    'values' => 0,
                ),
                'not empty' => array(
                    'title' => t('Is not empty (NOT NULL)'),
                    'method' => 'op_empty',
                    'short' => t('not empty'),
                    'values' => 0,
                ),
            );
        }
        // Add regexp support for MySQL.
        if (Database::getConnection()->databaseType() == 'mysql') {
            $operators += array(
                'regular_expression' => array(
                    'title' => t('Regular expression'),
                    'short' => t('regex'),
                    'method' => 'op_regex',
                    'values' => 1,
                ),
                'not_regular_expression' => array(
                    'title' => t('Not regular expression'),
                    'short' => t('not regex'),
                    'method' => 'op_not_regex',
                    'values' => 1,
                ),
            );
        }
        return $operators;
    }
    
    /**
     * Provide a list of all the numeric operators.
     */
    public function operator_options($which = 'title') {
        $options = array();
        foreach ($this->operators() as $id => $info) {
            $options[$id] = $info[$which];
        }
        return $options;
    }
    
    /**
     * {@inheritdoc}
     */
    public function operator_values($values = 1) {
        $options = array();
        foreach ($this->operators() as $id => $info) {
            if ($info['values'] == $values) {
                $options[] = $id;
            }
        }
        return $options;
    }
    
    /**
     * Provide a simple textfield for equality.
     */
    public function value_form(&$form, &$form_state) {
        $form['value']['#tree'] = TRUE;
        // We have to make some choices when creating this as an exposed
        // filter form. For example, if the operator is locked and thus
        // not rendered, we can't render dependencies; instead we only
        // render the form items we need.
        $which = 'all';
        $limit_operators = !empty($this->options['expose']['limit_operators']) && count($this->options['expose']['available_operators']) > 0;
        $use_value = FALSE;
        $use_minmax = FALSE;
        if (!empty($form['operator'])) {
            $source = $form['operator']['#type'] == 'radios' ? 'radio:options[operator]' : 'edit-options-operator';
        }
        if (!empty($form_state['exposed'])) {
            $operator_values_with_1_values = $this->operator_values(1);
            $operator_values_with_2_values = $this->operator_values(2);
            if ($limit_operators) {
                // If limit operators is enabled, check that at least one operator
                // with two values is enabled to display the min max widgets.
                foreach ($operator_values_with_2_values as $operator) {
                    if (isset($this->options['expose']['available_operators'][$operator])) {
                        $use_minmax = TRUE;
                        break;
                    }
                }
                // The same for operators with one value.
                foreach ($operator_values_with_1_values as $operator) {
                    if (isset($this->options['expose']['available_operators'][$operator])) {
                        $use_value = TRUE;
                        break;
                    }
                }
            }
            else {
                $use_minmax = $use_value = TRUE;
            }
            $identifier = $this->options['expose']['identifier'];
            if (empty($this->options['expose']['use_operator']) || empty($this->options['expose']['operator_id'])) {
                // Exposed and locked.
                $which = in_array($this->operator, $operator_values_with_2_values) ? 'minmax' : 'value';
            }
            else {
                $source = 'edit-' . drupal_html_id($this->options['expose']['operator_id']);
            }
        }
        else {
            $use_minmax = $use_value = TRUE;
        }
        if ($use_value) {
            if ($which == 'all') {
                $form['value']['value'] = array(
                    '#type' => 'textfield',
                    '#title' => empty($form_state['exposed']) ? t('Value') : '',
                    '#size' => 30,
                    '#default_value' => $this->value['value'],
                    '#dependency' => array(
                        $source => $this->operator_values(1),
                    ),
                );
                if (!empty($form_state['exposed']) && !isset($form_state['input'][$identifier]['value'])) {
                    $form_state['input'][$identifier]['value'] = $this->value['value'];
                }
            }
            elseif ($which == 'value') {
                // When exposed we drop the value-value and just do value if
                // the operator is locked.
                $form['value'] = array(
                    '#type' => 'textfield',
                    '#title' => empty($form_state['exposed']) ? t('Value') : '',
                    '#size' => 30,
                    '#default_value' => $this->value['value'],
                );
                if (!empty($form_state['exposed']) && !isset($form_state['input'][$identifier])) {
                    $form_state['input'][$identifier] = $this->value['value'];
                }
            }
        }
        if ($which == 'all' || $which == 'minmax') {
            if ($use_minmax) {
                $form['value']['min'] = array(
                    '#type' => 'textfield',
                    '#title' => empty($form_state['exposed']) ? t('Min') : '',
                    '#size' => 30,
                    '#default_value' => $this->value['min'],
                );
                $form['value']['max'] = array(
                    '#type' => 'textfield',
                    '#title' => empty($form_state['exposed']) ? t('And max') : t('And'),
                    '#size' => 30,
                    '#default_value' => $this->value['max'],
                );
                if ($which == 'all') {
                    $dependency = array(
                        '#dependency' => array(
                            $source => $this->operator_values(2),
                        ),
                    );
                    $form['value']['min'] += $dependency;
                    $form['value']['max'] += $dependency;
                }
            }
            if (!empty($form_state['exposed']) && !isset($form_state['input'][$identifier]['min']) && $use_minmax) {
                $form_state['input'][$identifier]['min'] = $this->value['min'];
            }
            if (!empty($form_state['exposed']) && !isset($form_state['input'][$identifier]['max']) && $use_minmax) {
                $form_state['input'][$identifier]['max'] = $this->value['max'];
            }
            if (!isset($form['value'])) {
                // Ensure there is something in the 'value'.
                $form['value'] = array(
                    '#type' => 'value',
                    '#value' => NULL,
                );
            }
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function query() {
        $this->ensure_my_table();
        $field = "{$this->table_alias}.{$this->real_field}";
        $info = $this->operators();
        if (!empty($info[$this->operator]['method'])) {
            $this->{$info[$this->operator]['method']}($field);
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function op_between($field) {
        if ($this->operator == 'between') {
            $this->query
                ->add_where($this->options['group'], $field, array(
                $this->value['min'],
                $this->value['max'],
            ), 'BETWEEN');
        }
        else {
            $this->query
                ->add_where($this->options['group'], db_or()->condition($field, $this->value['min'], '<=')
                ->condition($field, $this->value['max'], '>='));
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function op_simple($field) {
        $this->query
            ->add_where($this->options['group'], $field, $this->value['value'], $this->operator);
    }
    
    /**
     * {@inheritdoc}
     */
    public function op_empty($field) {
        if ($this->operator == 'empty') {
            $operator = "IS NULL";
        }
        else {
            $operator = "IS NOT NULL";
        }
        $this->query
            ->add_where($this->options['group'], $field, NULL, $operator);
    }
    
    /**
     * {@inheritdoc}
     */
    public function op_regex($field) {
        $this->query
            ->add_where($this->options['group'], $field, $this->value['value'], 'RLIKE');
    }
    
    /**
     * {@inheritdoc}
     */
    public function op_not_regex($field) {
        $this->query
            ->add_where($this->options['group'], $field, $this->value['value'], 'NOT RLIKE');
    }
    
    /**
     * {@inheritdoc}
     */
    public function admin_summary() {
        if ($this->is_a_group()) {
            return t('grouped');
        }
        if (!empty($this->options['exposed'])) {
            return t('exposed');
        }
        $options = $this->operator_options('short');
        $output = check_plain($options[$this->operator]);
        if (in_array($this->operator, $this->operator_values(2))) {
            $output .= ' ' . t('@min and @max', array(
                '@min' => $this->value['min'],
                '@max' => $this->value['max'],
            ));
        }
        elseif (in_array($this->operator, $this->operator_values(1))) {
            $output .= ' ' . check_plain($this->value['value']);
        }
        return $output;
    }
    
    /**
     * Do some minor translation of the exposed input.
     */
    public function accept_exposed_input($input) {
        if (empty($this->options['exposed'])) {
            return TRUE;
        }
        // Rewrite the input value so that it's in the correct format so that the
        // parent gets the right data.
        if (!empty($this->options['expose']['identifier'])) {
            $value =& $input[$this->options['expose']['identifier']];
            if (!is_array($value)) {
                $value = array(
                    'value' => $value,
                );
            }
            if (!empty($this->options['expose']['use_operator']) && !empty($this->options['expose']['operator_id']) && isset($input[$this->options['expose']['operator_id']])) {
                if ($input[$this->options['expose']['operator_id']] === 'empty' || $input[$this->options['expose']['operator_id']] === 'not empty') {
                    // Parent method will expect a boolean value. We don't ask for a value
                    // so we'll force "Yes".
                    $value['value'] = 1;
                }
            }
        }
        $rc = parent::accept_exposed_input($input);
        if (empty($this->options['expose']['required'])) {
            // We have to do some of our own checking for non-required filters.
            $info = $this->operators();
            if (!empty($info[$this->operator]['values']) && is_array($value)) {
                switch ($info[$this->operator]['values']) {
                    case 1:
                        if (array_key_exists('value', $value) && $value['value'] === '') {
                            return FALSE;
                        }
                        break;
                    case 2:
                        if (array_key_exists('min', $value) && $value['min'] === '' && array_key_exists('max', $value) && $value['max'] === '') {
                            return FALSE;
                        }
                        break;
                }
            }
        }
        return $rc;
    }

}