data; } /** * Return a list of filters enabled for a particular content type */ function opencalais_filters_get_enabled_filters($content_type){ $settings = variable_get('opencalais_filters_settings', array()); if(isset($settings[$content_type])){ $filters = opencalais_filters_get_filters(); foreach($filters as $name=>$filter){ if(!in_array($name, $settings[$content_type])){ unset($filters[$name]); } } return $filters; } else { return array(); } } /** * Provide a menu callback to show the configure form for the filter */ function opencalais_filters_configure_filter($filter_name){ $filters = opencalais_filters_get_filters(); if(isset($filters[$filter_name]['configuration'])){ return drupal_get_form($filters[$filter_name]['configuration']); } //we should probably handle some sort of 404 action here if the filter doesn't exist } /** * Provides the configuration form for filters which basically allows you to apply filters * to content types */ function opencalais_filters_config_form(){ $form = array(); $content_types = _opencalais_get_content_types(); $filter_options = opencalais_filters_get_filters(); $form['filters'] = array( '#type' => 'fieldset', '#title' => t('Configure Filters'), ); foreach($filter_options as $machine=>$filter){ $form['filters'][$machine] = array( '#markup' => '', ); } $form['config'] = array( '#type' => 'vertical_tabs', '#title' => t('Apply Filters'), ); $filter_options = _opencalais_filters_make_options_array($filter_options); foreach($content_types as $type=>$info){ $filters = opencalais_filters_get_enabled_filters($type); $filters = _opencalais_filters_make_options_array($filters); $form['config'][$type.'tab'] = array( '#type' => 'fieldset', '#title' => $info['label'], ); $form['config'][$type.'tab'][$type] = array( '#type' => 'checkboxes', '#options' => $filter_options, '#title' => t('@type Filters', array('@type' => $info['label'])), '#description' => t("Filters to be run on this content type"), '#default_value' => array_keys($filters), ); } $form = system_settings_form($form); $form['#submit'] = array('opencalais_filters_save_settings'); return $form; } /** * Save the settings off the main configuration form */ function opencalais_filters_save_settings($form, &$form_state){ $content_types = _opencalais_get_content_types(); $settings = variable_get('opencalais_filters_settings', array()); foreach($content_types as $type=>$info){ $settings[$type] = array_filter($form_state['values'][$type]); } variable_set('opencalais_filters_settings', $settings); drupal_set_message(t('Configuration successfully updated.')); } #################### Define filters and their callbacks #################### /** * Define a filter type */ function opencalais_opencalais_filter_info(){ return array( 'global_blacklist' => array( 'title' => t('Blacklist'), 'description' => t('Use a taxonomy vocabularly as a global black list. Terms in the vocabulary will not be applied.'), 'callback' => 'opencalais_filters_blacklist', 'configuration' => 'opencalais_filters_blacklist_config' ), ); } function opencalais_filters_blacklist(&$terms, $content_type){ $vocab = variable_get('opencalais_filters_blacklist_vocab', FALSE); if($vocab){ $blacklist = taxonomy_get_tree($vocab); //create an array keyed by name to avoid having to loop through repeatedly $blacklist = _opencalais_filters_create_name_array($blacklist); //filter the terms foreach($terms as $name=>$tags){ foreach($tags as $term=>$info){ if(isset($blacklist[$term])){ unset($terms[$name][$term]); } } } } //otherwise do nothing } function opencalais_filters_blacklist_config(){ $form = array(); $vocabs = taxonomy_get_vocabularies(); foreach($vocabs as $vocab){ $options[$vocab->vid] = $vocab->name; } $form['opencalais_filters_blacklist_vocab'] = array( '#type' => 'select', '#title' => 'Vocabulary to use as Blacklist', '#options' => $options, '#default_value' => variable_get('opencalais_filters_blacklist_vocab', FALSE), ); return system_settings_form($form); } ##################### Utility functions ##################### /** * Utility Function to create an array keyed by name * Accepts arrays of taxonomy term objects */ function _opencalais_filters_create_name_array($array){ $to_ret = array(); foreach($array as $key=>$value){ $to_ret[$value->name] = $value->tid; } return $to_ret; } /** * Take an array of filters and make it into an options array */ function _opencalais_filters_make_options_array($filters){ $to_ret = array(); foreach($filters as $machine=>$filter){ $to_ret[$machine]=$filter['title']; } return $to_ret; }