Complex classes like midcom_helper_search_handler_search often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use midcom_helper_search_handler_search, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 14 | class midcom_helper_search_handler_search extends midcom_baseclasses_components_handler |
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| 15 | { |
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| 16 | /** |
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| 17 | * Search form handler, nothing to do here. |
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| 18 | * |
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| 19 | * It uses the handler ID to distinguish between basic and advanced search forms. |
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| 20 | * |
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| 21 | * @param mixed $handler_id The ID of the handler. |
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| 22 | * @param array $args The argument list. |
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| 23 | * @param array &$data The local request data. |
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| 24 | */ |
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| 25 | public function _handler_searchform($handler_id, array $args, array &$data) |
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| 30 | |||
| 31 | private function prepare_formdata($handler_id) |
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| 32 | { |
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| 33 | $this->_request_data['query'] = (array_key_exists('query', $_REQUEST) ? $_REQUEST['query'] : ''); |
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| 34 | if ($handler_id === 'advanced') |
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| 35 | { |
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| 36 | $this->_request_data['request_topic'] = (array_key_exists('topic', $_REQUEST) ? $_REQUEST['topic'] : ''); |
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| 37 | $this->_request_data['component'] = (array_key_exists('component', $_REQUEST) ? $_REQUEST['component'] : ''); |
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| 38 | $this->_request_data['lastmodified'] = (array_key_exists('lastmodified', $_REQUEST) ? ((integer) $_REQUEST['lastmodified']) : 0); |
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| 39 | |||
| 40 | $this->_request_data['topics'] = array('' => $this->_l10n->get('search anywhere')); |
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| 41 | $this->_request_data['components'] = array('' => $this->_l10n->get('search all content types')); |
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| 42 | |||
| 43 | $nap = new midcom_helper_nav(); |
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| 44 | $this->search_nodes($nap->get_root_node(), $nap, ''); |
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| 45 | } |
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| 46 | $this->_request_data['type'] = $handler_id; |
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| 47 | } |
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| 48 | |||
| 49 | /** |
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| 50 | * Prepare the topic and component listings, this is a bit work intensive though, |
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| 51 | * we need to traverse everything. |
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| 52 | */ |
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| 53 | private function search_nodes($node_id, $nap, $prefix) |
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| 54 | { |
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| 55 | $node = $nap->get_node($node_id); |
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| 56 | |||
| 57 | if ( ! array_key_exists($node[MIDCOM_NAV_COMPONENT], $this->_request_data['components']) |
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| 58 | && $node[MIDCOM_NAV_COMPONENT] != 'midcom.helper.search') |
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| 59 | { |
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| 60 | $l10n = $this->_i18n->get_l10n($node[MIDCOM_NAV_COMPONENT]); |
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| 61 | $this->_request_data['components'][$node[MIDCOM_NAV_COMPONENT]] = $l10n->get($node[MIDCOM_NAV_COMPONENT]); |
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| 62 | } |
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| 63 | $this->_request_data['topics'][$node[MIDCOM_NAV_FULLURL]] = "{$prefix}{$node[MIDCOM_NAV_NAME]}"; |
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| 64 | |||
| 65 | // Recurse |
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| 66 | $prefix .= "{$node[MIDCOM_NAV_NAME]} › "; |
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| 67 | $subnodes = $nap->list_nodes($node_id); |
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| 68 | foreach ($subnodes as $sub_id) |
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| 69 | { |
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| 70 | $this->search_nodes($sub_id, $nap, $prefix); |
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| 71 | } |
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| 72 | } |
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| 73 | |||
| 74 | /** |
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| 75 | * Search form show handler, displays the search form, including |
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| 76 | * some hints about how to write queries. |
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| 77 | * |
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| 78 | * @param mixed $handler_id The ID of the handler. |
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| 79 | * @param array &$data The local request data. |
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| 80 | */ |
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| 81 | public function _show_searchform($handler_id, array &$data) |
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| 85 | |||
| 86 | /** |
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| 87 | * Expand arrays of custom rules to end of query |
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| 88 | * |
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| 89 | * @param string &$final_query reference to the query string to be passed on to the indexer. |
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| 90 | * @param mixed $terms array or string to append |
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| 91 | */ |
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| 92 | private function append_terms_recursive(&$final_query, $terms) |
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| 111 | |||
| 112 | /** |
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| 113 | * Queries the information from the index and prepares to display the result page. |
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| 114 | * |
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| 115 | * @param mixed $handler_id The ID of the handler. |
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| 116 | * @param array $args The argument list. |
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| 117 | * @param array &$data The local request data. |
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| 118 | */ |
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| 119 | public function _handler_result($handler_id, array $args, array &$data) |
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| 149 | |||
| 150 | private function populate_toolbar() |
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| 151 | { |
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| 152 | $other_type = ($this->_request_data['type'] == 'advanced') ? 'basic' : 'advanced'; |
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| 153 | $this->_request_data['params'] = ''; |
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| 154 | if (!empty($_GET)) |
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| 155 | { |
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| 156 | $this->_request_data['params'] = '?'; |
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| 157 | $params = $_GET; |
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| 158 | $params['type'] = $other_type; |
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| 159 | $this->_request_data['params'] .= http_build_query($params); |
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| 160 | } |
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| 161 | |||
| 162 | $url = ''; |
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| 163 | if ($this->_request_data['type'] == 'basic') |
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| 164 | { |
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| 165 | $url = 'advanced/'; |
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| 166 | } |
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| 167 | |||
| 168 | $this->_view_toolbar->add_item |
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| 169 | ( |
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| 170 | array |
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| 171 | ( |
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| 172 | MIDCOM_TOOLBAR_URL => $url . $this->_request_data['params'], |
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| 173 | MIDCOM_TOOLBAR_LABEL => $this->_l10n->get($other_type . ' search'), |
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| 174 | MIDCOM_TOOLBAR_ICON => 'stock-icons/16x16/search.png', |
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| 175 | ) |
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| 176 | ); |
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| 177 | } |
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| 178 | |||
| 179 | private function process_results($result) |
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| 180 | { |
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| 181 | if ($result === false) |
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| 182 | { |
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| 183 | // Error while searching, we ignore this silently, as this is usually |
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| 184 | // a broken query. We don't have yet a way to pass error messages from |
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| 185 | // the indexer backend though (what would I give for a decent exception |
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| 186 | // handling here...) |
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| 187 | debug_add('Got boolean false as resultset (likely broken query), casting to empty array', MIDCOM_LOG_WARN); |
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| 188 | $result = Array(); |
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| 189 | } |
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| 190 | |||
| 191 | $count = count($result); |
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| 192 | $this->_request_data['document_count'] = $count; |
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| 193 | |||
| 194 | if ($count == 0) |
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| 195 | { |
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| 196 | midcom::get()->cache->content->uncached(); |
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| 197 | } |
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| 198 | |||
| 199 | if ($count > 0) |
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| 200 | { |
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| 201 | $results_per_page = $this->_config->get('results_per_page'); |
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| 202 | $max_pages = ceil($count / $results_per_page); |
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| 203 | $page = min($_REQUEST['page'], $max_pages); |
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| 204 | $first_document_id = ($page - 1) * $results_per_page; |
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| 205 | $last_document_id = min(($count - 1), (($page * $results_per_page) - 1)); |
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| 206 | |||
| 207 | $this->_request_data['page'] = $page; |
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| 208 | $this->_request_data['max_pages'] = $max_pages; |
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| 209 | $this->_request_data['first_document_number'] = $first_document_id + 1; |
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| 210 | $this->_request_data['last_document_number'] = $last_document_id + 1; |
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| 211 | $this->_request_data['shown_documents'] = $last_document_id - $first_document_id + 1; |
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| 212 | $this->_request_data['results_per_page'] = $results_per_page; |
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| 213 | $this->_request_data['all_results'] =& $result; |
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| 214 | $this->_request_data['result'] = array_slice($result, $first_document_id, $results_per_page); |
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| 215 | |||
| 216 | // Register GUIDs for cache engine |
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| 217 | foreach ($this->_request_data['result'] as $doc) |
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| 218 | { |
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| 219 | if ( !isset($doc->source) |
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| 220 | || !mgd_is_guid($doc->source)) |
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| 221 | { |
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| 222 | // Non-Midgard results don't need to go through cache registration |
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| 223 | continue; |
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| 224 | } |
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| 225 | midcom::get()->cache->content->register($doc->source); |
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| 226 | } |
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| 227 | reset($this->_request_data['result']); |
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| 228 | } |
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| 229 | } |
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| 230 | |||
| 231 | /** |
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| 232 | * Sane defaults for REQUEST vars |
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| 233 | */ |
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| 234 | private function prepare_query_data() |
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| 235 | { |
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| 236 | // If we don't have a query string, relocate to empty search form |
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| 237 | if (!isset($_REQUEST['query'])) |
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| 238 | { |
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| 239 | debug_add('$_REQUEST["query"] is not set, relocating back to form', MIDCOM_LOG_INFO); |
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| 240 | if ($this->_request_data['type'] == 'basic') |
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| 241 | { |
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| 242 | midcom::get()->relocate(''); |
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| 243 | } |
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| 244 | midcom::get()->relocate('advanced/'); |
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| 245 | } |
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| 246 | $defaults = array |
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| 247 | ( |
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| 248 | 'type' => 'basic', |
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| 249 | 'page' => 1, |
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| 250 | 'component' => '', |
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| 251 | 'topic' => '', |
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| 252 | 'lastmodified' => 0 |
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| 253 | ); |
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| 254 | |||
| 255 | $_REQUEST = array_merge($defaults, $_REQUEST); |
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| 256 | } |
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| 257 | |||
| 258 | private function do_advanced_query(array &$data) |
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| 259 | { |
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| 260 | $data['request_topic'] = trim($_REQUEST['topic']); |
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| 261 | $data['component'] = trim($_REQUEST['component']); |
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| 262 | $data['lastmodified'] = (integer) trim($_REQUEST['lastmodified']); |
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| 263 | $filter = new midcom_services_indexer_filter_chained; |
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| 264 | if ($data['lastmodified'] > 0) |
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| 265 | { |
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| 266 | $filter->add_filter(new midcom_services_indexer_filter_date('__EDITED', $data['lastmodified'], 0)); |
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| 267 | } |
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| 268 | |||
| 269 | $final_query = ''; |
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| 270 | if ($data['query'] != '') |
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| 271 | { |
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| 272 | $final_query = (midcom::get()->config->get('indexer_backend') == 'solr') ? $data['query'] : "({$data['query']})"; |
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| 273 | } |
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| 274 | |||
| 275 | if ($data['request_topic'] != '') |
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| 276 | { |
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| 277 | $filter->add_filter(new midcom_services_indexer_filter_string('__TOPIC_URL', '"' . $data['request_topic'] . '*"')); |
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| 278 | } |
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| 279 | |||
| 280 | if ($data['component'] != '') |
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| 281 | { |
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| 282 | $filter->add_filter(new midcom_services_indexer_filter_string('__COMPONENT', $data['component'])); |
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| 283 | } |
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| 284 | |||
| 285 | // Way to add very custom terms |
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| 286 | if (isset($_REQUEST['append_terms'])) |
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| 287 | { |
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| 288 | $this->append_terms_recursive($final_query, $_REQUEST['append_terms']); |
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| 289 | } |
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| 290 | |||
| 291 | debug_add("Final query: {$final_query}"); |
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| 292 | $indexer = midcom::get()->indexer; |
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| 293 | |||
| 294 | if ($filter->count() == 0) |
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| 295 | { |
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| 296 | $filter = null; |
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| 297 | } |
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| 298 | return $indexer->query($final_query, $filter); |
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| 299 | } |
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| 300 | |||
| 301 | /** |
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| 302 | * Displays the resultset. |
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| 303 | * |
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| 304 | * @param mixed $handler_id The ID of the handler. |
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| 305 | * @param array &$data The local request data. |
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| 306 | */ |
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| 307 | public function _show_result($handler_id, array &$data) |
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| 318 | |||
| 319 | /** |
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| 320 | * Prepare OpenSearch data file for browser search bar integration. |
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| 321 | * |
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| 322 | * @param mixed $handler_id The ID of the handler. |
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| 323 | * @param array $args The argument list. |
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| 324 | * @param array &$data The local request data. |
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| 325 | */ |
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| 326 | public function _handler_opensearchdescription($handler_id, array $args, array &$data) |
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| 332 | |||
| 333 | /** |
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| 334 | * Display OpenSearch data file for browser search bar integration. |
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| 335 | * |
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| 336 | * @param mixed $handler_id The ID of the handler. |
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| 337 | * @param array &$data The local request data. |
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| 338 | */ |
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| 339 | public function _show_opensearchdescription($handler_id, array &$data) |
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| 344 | } |
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| 345 |
You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.