Complex classes like data 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 data, and based on these observations, apply Extract Interface, too.
1 | <?php |
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14 | class data extends query_builder |
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15 | { |
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16 | /** @var \phpbb\auth\auth */ |
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17 | protected $auth; |
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18 | |||
19 | /** @var \phpbb\config\config */ |
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20 | protected $config; |
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21 | |||
22 | /** @var \phpbb\content_visibility */ |
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23 | protected $content_visibility; |
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24 | |||
25 | /** @var \phpbb\db\driver\driver_interface */ |
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26 | protected $db; |
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27 | |||
28 | /** @var \phpbb\user */ |
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29 | protected $user; |
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30 | |||
31 | /** |
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32 | * Constructor |
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33 | * |
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34 | * @param \phpbb\auth\auth $auth Auth object |
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35 | * @param \phpbb\config\config $config Config object |
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36 | * @param \phpbb\content_visibility $content_visibility Content visibility |
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37 | * @param \phpbb\db\driver\driver_interface $db Database connection |
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38 | * @param \phpbb\user $user User object |
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39 | * @param integer $cache_time Cache results for 3 hours by default |
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40 | */ |
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41 | 23 | public function __construct(\phpbb\auth\auth $auth, \phpbb\config\config $config, \phpbb\content_visibility $content_visibility, \phpbb\db\driver\driver_interface $db, \phpbb\user $user, $cache_time = 10800) |
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51 | |||
52 | /** |
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53 | * Get topic data |
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54 | * |
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55 | * @param mixed|false $limit |
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56 | * @param int $start |
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57 | * @return array |
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58 | */ |
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59 | 11 | public function get_topic_data($limit = false, $start = 0) |
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77 | |||
78 | /** |
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79 | * Get post data |
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80 | * |
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81 | * @param mixed|false $topic_first_or_last_post (first|last) |
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82 | * @param array $post_ids |
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83 | * @param bool|false $limit |
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84 | * @param int $start |
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85 | * @param array $sql_array |
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86 | * @return array |
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87 | */ |
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88 | 8 | public function get_post_data($topic_first_or_last_post = false, $post_ids = array(), $limit = false, $start = 0, $sql_array = array()) |
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123 | |||
124 | /** |
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125 | * Get attachments... |
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126 | * |
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127 | * @param int $forum_id |
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128 | * @param bool $exclude_in_message |
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129 | * @param string $order_by |
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130 | * @return array |
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131 | */ |
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132 | 5 | public function get_attachments($forum_id = 0, $allowed_extensions, $exclude_in_message = true, $order_by = 'filetime DESC, post_msg_id ASC') |
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152 | |||
153 | /** |
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154 | * Get topic tracking info |
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155 | * |
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156 | * @param int $forum_id |
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157 | * @return array |
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158 | */ |
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159 | 4 | public function get_topic_tracking_info($forum_id = 0) |
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170 | |||
171 | /** |
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172 | * Returns an array of topic first post or last post ids |
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173 | * |
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174 | * @return array |
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175 | */ |
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176 | public function get_posters_info() |
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194 | |||
195 | /** |
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196 | * Returns an array of topic first post or last post ids |
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197 | * |
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198 | * @param string $first_or_last_post |
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199 | * @return array |
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200 | */ |
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201 | 3 | public function get_topic_post_ids($first_or_last_post = 'first') |
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205 | |||
206 | /** |
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207 | * @param array $post_ids |
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208 | * @param string $topic_first_or_last_post |
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209 | * @return array |
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210 | */ |
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211 | 8 | private function _get_post_data_where(array $post_ids, $topic_first_or_last_post) |
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233 | |||
234 | /** |
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235 | * @return array |
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236 | */ |
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237 | 4 | private function _get_tracking_info() |
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251 | |||
252 | /** |
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253 | * @param string $function |
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254 | * @return array |
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255 | */ |
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256 | 4 | private function _build_tracking_info($function) |
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266 | |||
267 | /** |
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268 | * @return bool |
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269 | */ |
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270 | 4 | private function _can_track_by_lastread() |
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274 | |||
275 | /** |
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276 | * @return bool |
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277 | */ |
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278 | private function _can_track_anonymous() |
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282 | |||
283 | /** |
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284 | * @param int $forum_id |
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285 | * @return bool |
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286 | */ |
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287 | 5 | private function _attachments_allowed($forum_id) |
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291 | |||
292 | 4 | private function _get_attachment_sql($allowed_extensions, $exclude_in_message, $order_by) |
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301 | } |
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302 |