Complex classes like Mailbox 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 Mailbox, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 19 | class Mailbox implements IMailBox { |
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| 20 | |||
| 21 | /** |
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| 22 | * @var Horde_Imap_Client_Socket |
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| 23 | */ |
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| 24 | protected $conn; |
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| 25 | |||
| 26 | /** |
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| 27 | * @var array |
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| 28 | */ |
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| 29 | private $attributes; |
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| 30 | |||
| 31 | /** |
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| 32 | * @var string |
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| 33 | */ |
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| 34 | private $specialRole; |
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| 35 | |||
| 36 | /** |
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| 37 | * @var string |
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| 38 | */ |
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| 39 | private $displayName; |
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| 40 | |||
| 41 | /** |
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| 42 | * @var string |
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| 43 | */ |
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| 44 | private $delimiter; |
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| 45 | |||
| 46 | /** |
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| 47 | * @var Horde_Imap_Client_Mailbox |
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| 48 | */ |
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| 49 | protected $mailBox; |
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| 50 | |||
| 51 | /** |
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| 52 | * @param Horde_Imap_Client_Socket $conn |
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| 53 | * @param Horde_Imap_Client_Mailbox $mailBox |
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| 54 | * @param array $attributes |
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| 55 | * @param string $delimiter |
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| 56 | */ |
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| 57 | public function __construct($conn, $mailBox, $attributes, $delimiter='/') { |
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| 58 | $this->conn = $conn; |
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| 59 | $this->mailBox = $mailBox; |
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| 60 | $this->attributes = $attributes; |
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| 61 | $this->delimiter = $delimiter; |
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| 62 | $this->getSpecialRoleFromAttributes(); |
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| 63 | if ($this->specialRole === null) { |
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| 64 | $this->guessSpecialRole(); |
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| 65 | } |
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| 66 | $this->makeDisplayName(); |
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| 67 | } |
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| 68 | |||
| 69 | public function getMessages($from = 0, $count = 2, $filter = '') { |
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| 70 | if ($filter instanceof Horde_Imap_Client_Search_Query) { |
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| 71 | $query = $filter; |
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| 72 | } else { |
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| 73 | $query = new Horde_Imap_Client_Search_Query(); |
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| 74 | if ($filter) { |
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| 75 | $query->text($filter, false); |
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| 76 | } |
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| 77 | } |
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| 78 | if ($this->getSpecialRole() !== 'trash') { |
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| 79 | $query->flag(Horde_Imap_Client::FLAG_DELETED, false); |
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| 80 | } |
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| 81 | $result = $this->conn->search($this->mailBox, $query, ['sort' => [Horde_Imap_Client::SORT_DATE]]); |
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| 82 | $ids = array_reverse($result['match']->ids); |
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| 83 | if ($from >= 0 && $count >= 0) { |
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| 84 | $ids = array_slice($ids, $from, $count); |
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| 85 | } |
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| 86 | $ids = new \Horde_Imap_Client_Ids($ids, false); |
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| 87 | |||
| 88 | $headers = []; |
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| 89 | |||
| 90 | $fetch_query = new \Horde_Imap_Client_Fetch_Query(); |
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| 91 | $fetch_query->envelope(); |
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| 92 | $fetch_query->flags(); |
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| 93 | $fetch_query->size(); |
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| 94 | $fetch_query->uid(); |
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| 95 | $fetch_query->imapDate(); |
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| 96 | $fetch_query->structure(); |
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| 97 | |||
| 98 | $headers = array_merge($headers, [ |
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| 99 | 'importance', |
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| 100 | 'list-post', |
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| 101 | 'x-priority' |
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| 102 | ]); |
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| 103 | $headers[] = 'content-type'; |
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| 104 | |||
| 105 | $fetch_query->headers('imp', $headers, [ |
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| 106 | 'cache' => true, |
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| 107 | 'peek' => true |
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| 108 | ]); |
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| 109 | |||
| 110 | $options = ['ids' => $ids]; |
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| 111 | // $list is an array of Horde_Imap_Client_Data_Fetch objects. |
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| 112 | $headers = $this->conn->fetch($this->mailBox, $fetch_query, $options); |
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| 113 | |||
| 114 | ob_start(); // fix for Horde warnings |
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| 115 | $messages = []; |
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| 116 | foreach ($headers->ids() as $message_id) { |
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| 117 | $header = $headers[$message_id]; |
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| 118 | $message = new IMAPMessage($this->conn, $this->mailBox, $message_id, $header); |
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| 119 | $messages[] = $message->getListArray(); |
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| 120 | } |
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| 121 | ob_get_clean(); |
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| 122 | |||
| 123 | // sort by time |
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| 124 | usort($messages, function($a, $b) { |
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| 125 | return $a['dateInt'] < $b['dateInt']; |
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| 126 | }); |
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| 127 | |||
| 128 | return $messages; |
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| 129 | } |
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| 130 | |||
| 131 | /** |
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| 132 | * @return array |
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| 133 | */ |
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| 134 | public function attributes() { |
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| 135 | return $this->attributes; |
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| 136 | } |
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| 137 | |||
| 138 | /** |
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| 139 | * @param string $messageId |
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| 140 | * @param bool $loadHtmlMessageBody |
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| 141 | * @return IMAPMessage |
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| 142 | */ |
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| 143 | public function getMessage($messageId, $loadHtmlMessageBody = false) { |
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| 146 | |||
| 147 | /** |
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| 148 | * @param int $flags |
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| 149 | * @return array |
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| 150 | */ |
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| 151 | public function getStatus($flags = \Horde_Imap_Client::STATUS_ALL) { |
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| 152 | return $this->conn->status($this->mailBox, $flags); |
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| 153 | } |
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| 154 | |||
| 155 | /** |
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| 156 | * @return int |
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| 157 | */ |
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| 158 | public function getTotalMessages() { |
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| 159 | $status = $this->getStatus(\Horde_Imap_Client::STATUS_MESSAGES); |
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| 160 | return (int) $status['messages']; |
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| 161 | } |
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| 162 | |||
| 163 | protected function makeDisplayName() { |
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| 164 | $parts = explode($this->delimiter, $this->mailBox->utf8, 2); |
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| 165 | |||
| 166 | if (count($parts) > 1) { |
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| 167 | $displayName = $parts[1]; |
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| 168 | } elseif (strtolower($this->mailBox->utf8) === 'inbox') { |
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| 169 | $displayName = 'Inbox'; |
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| 170 | } else { |
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| 171 | $displayName = $this->mailBox->utf8; |
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| 172 | } |
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| 173 | |||
| 174 | $this->displayName = $displayName; |
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| 175 | } |
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| 176 | |||
| 177 | public function getFolderId() { |
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| 178 | return $this->mailBox->utf8; |
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| 179 | } |
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| 180 | |||
| 181 | /** |
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| 182 | * @return string |
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| 183 | */ |
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| 184 | public function getParent() { |
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| 185 | $folderId = $this->getFolderId(); |
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| 186 | $parts = explode($this->delimiter, $folderId, 2); |
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| 187 | |||
| 188 | if (count($parts) > 1) { |
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| 189 | return $parts[0]; |
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| 190 | } |
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| 191 | |||
| 192 | return null; |
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| 193 | } |
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| 194 | |||
| 195 | /** |
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| 196 | * @return string |
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| 197 | */ |
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| 198 | public function getSpecialRole() { |
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| 199 | return $this->specialRole; |
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| 200 | } |
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| 201 | |||
| 202 | /** |
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| 203 | * @return string |
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| 204 | */ |
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| 205 | public function getDisplayName() { |
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| 206 | return $this->displayName; |
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| 207 | } |
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| 208 | |||
| 209 | /** |
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| 210 | * @param string $displayName |
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| 211 | */ |
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| 212 | public function setDisplayName($displayName) { |
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| 213 | $this->displayName = $displayName; |
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| 214 | } |
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| 215 | |||
| 216 | /** |
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| 217 | * @param integer $accountId |
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| 218 | * @return array |
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| 219 | */ |
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| 220 | public function getListArray($accountId, $status = null) { |
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| 221 | $displayName = $this->getDisplayName(); |
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| 222 | try { |
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| 223 | if (is_null($status)) { |
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| 224 | $status = $this->getStatus(); |
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| 225 | } |
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| 226 | $total = $status['messages']; |
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| 227 | $specialRole = $this->getSpecialRole(); |
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| 228 | $unseen = ($specialRole === 'trash') ? 0 : $status['unseen']; |
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| 229 | $isEmpty = ($total === 0); |
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| 230 | $noSelect = in_array('\\noselect', $this->attributes); |
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| 231 | $parentId = $this->getParent(); |
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| 232 | $parentId = ($parentId !== null) ? base64_encode($parentId) : null; |
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| 233 | return [ |
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| 234 | 'id' => base64_encode($this->getFolderId()), |
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| 235 | 'parent' => $parentId, |
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| 236 | 'name' => $displayName, |
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| 237 | 'specialRole' => $specialRole, |
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| 238 | 'unseen' => $unseen, |
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| 239 | 'total' => $total, |
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| 240 | 'isEmpty' => $isEmpty, |
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| 241 | 'accountId' => $accountId, |
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| 242 | 'noSelect' => $noSelect, |
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| 243 | 'uidvalidity' => $status['uidvalidity'], |
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| 244 | 'uidnext' => $status['uidnext'], |
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| 245 | 'delimiter' => $this->delimiter |
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| 246 | ]; |
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| 247 | } catch (\Horde_Imap_Client_Exception $e) { |
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| 248 | return [ |
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| 249 | 'id' => base64_encode($this->getFolderId()), |
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| 250 | 'parent' => null, |
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| 251 | 'name' => $displayName, |
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| 252 | 'specialRole' => null, |
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| 253 | 'unseen' => 0, |
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| 254 | 'total' => 0, |
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| 255 | 'error' => $e->getMessage(), |
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| 256 | 'isEmpty' => true, |
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| 257 | 'accountId' => $accountId, |
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| 258 | 'noSelect' => true |
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| 259 | ]; |
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| 260 | } |
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| 261 | } |
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| 262 | /** |
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| 263 | * Get the special use role of the mailbox |
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| 264 | * |
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| 265 | * This method reads the attributes sent by the server |
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| 266 | * |
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| 267 | */ |
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| 268 | protected function getSpecialRoleFromAttributes() { |
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| 269 | /* |
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| 270 | * @todo: support multiple attributes on same folder |
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| 271 | * "any given server or message store may support |
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| 272 | * any combination of the attributes" |
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| 273 | * https://tools.ietf.org/html/rfc6154 |
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| 274 | */ |
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| 275 | $result = null; |
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| 276 | if (is_array($this->attributes)) { |
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| 277 | /* Convert attributes to lowercase, because gmail |
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| 278 | * returns them as lowercase (eg. \trash and not \Trash) |
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| 279 | */ |
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| 280 | $specialUseAttributes = [ |
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| 281 | strtolower(Horde_Imap_Client::SPECIALUSE_ALL), |
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| 282 | strtolower(Horde_Imap_Client::SPECIALUSE_ARCHIVE), |
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| 283 | strtolower(Horde_Imap_Client::SPECIALUSE_DRAFTS), |
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| 284 | strtolower(Horde_Imap_Client::SPECIALUSE_FLAGGED), |
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| 285 | strtolower(Horde_Imap_Client::SPECIALUSE_JUNK), |
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| 286 | strtolower(Horde_Imap_Client::SPECIALUSE_SENT), |
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| 287 | strtolower(Horde_Imap_Client::SPECIALUSE_TRASH) |
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| 288 | ]; |
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| 289 | |||
| 290 | $attributes = array_map(function($n) { |
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| 291 | return strtolower($n); |
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| 292 | }, $this->attributes); |
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| 293 | |||
| 294 | foreach ($specialUseAttributes as $attr) { |
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| 295 | if (in_array($attr, $attributes)) { |
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| 296 | $result = ltrim($attr, '\\'); |
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| 297 | break; |
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| 298 | } |
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| 299 | } |
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| 300 | |||
| 301 | } |
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| 302 | |||
| 303 | $this->specialRole = $result; |
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| 304 | } |
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| 305 | |||
| 306 | /** |
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| 307 | * Assign a special role to this mailbox based on its name |
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| 308 | */ |
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| 309 | protected function guessSpecialRole() { |
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| 310 | |||
| 311 | $specialFoldersDict = [ |
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| 312 | 'inbox' => ['inbox'], |
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| 313 | 'sent' => ['sent', 'sent items', 'sent messages', 'sent-mail', 'sentmail'], |
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| 314 | 'drafts' => ['draft', 'drafts'], |
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| 315 | 'archive' => ['archive', 'archives'], |
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| 316 | 'trash' => ['deleted messages', 'trash'], |
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| 317 | 'junk' => ['junk', 'spam', 'bulk mail'], |
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| 318 | ]; |
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| 319 | |||
| 320 | $lowercaseExplode = explode($this->delimiter, $this->getFolderId(), 2); |
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| 321 | $lowercaseId = strtolower(array_pop($lowercaseExplode)); |
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| 322 | $result = null; |
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| 323 | foreach ($specialFoldersDict as $specialRole => $specialNames) { |
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| 324 | if (in_array($lowercaseId, $specialNames)) { |
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| 325 | $result = $specialRole; |
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| 326 | break; |
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| 327 | } |
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| 328 | } |
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| 329 | |||
| 330 | $this->specialRole = $result; |
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| 331 | } |
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| 332 | |||
| 333 | /** |
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| 334 | * @param int $messageId |
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| 335 | * @param string $attachmentId |
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| 336 | * @return Attachment |
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| 337 | */ |
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| 338 | public function getAttachment($messageId, $attachmentId) { |
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| 341 | |||
| 342 | /** |
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| 343 | * @param string $rawBody |
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| 344 | * @param array $flags |
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| 345 | */ |
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| 346 | public function saveMessage($rawBody, $flags = []) { |
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| 347 | |||
| 348 | $this->conn->append($this->mailBox, [ |
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| 349 | [ |
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| 350 | 'data' => $rawBody, |
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| 351 | 'flags' => $flags |
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| 352 | ] |
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| 353 | ]); |
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| 354 | } |
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| 355 | |||
| 356 | /** |
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| 357 | * Save draft |
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| 358 | * |
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| 359 | * @param string $rawBody |
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| 360 | * @return int UID of the saved draft |
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| 361 | */ |
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| 362 | public function saveDraft($rawBody) { |
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| 363 | |||
| 364 | $uids = $this->conn->append($this->mailBox, [ |
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| 365 | [ |
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| 366 | 'data' => $rawBody, |
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| 367 | 'flags' => [ |
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| 368 | Horde_Imap_Client::FLAG_DRAFT, |
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| 369 | Horde_Imap_Client::FLAG_SEEN |
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| 370 | ] |
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| 371 | ] |
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| 372 | ]); |
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| 373 | return $uids->current(); |
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| 374 | } |
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| 375 | |||
| 376 | /** |
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| 377 | * @param int $uid |
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| 378 | * @param string $flag |
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| 379 | * @param boolean $add |
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| 380 | */ |
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| 381 | public function setMessageFlag($uid, $flag, $add) { |
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| 382 | $options = [ |
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| 383 | 'ids' => new Horde_Imap_Client_Ids($uid) |
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| 384 | ]; |
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| 385 | if ($add) { |
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| 386 | $options['add'] = [$flag]; |
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| 387 | } else { |
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| 388 | $options['remove'] = [$flag]; |
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| 389 | } |
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| 390 | $this->conn->store($this->mailBox, $options); |
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| 391 | } |
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| 392 | |||
| 393 | /** |
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| 394 | * @param $fromUid |
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| 395 | * @param $toUid |
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| 396 | * @return array |
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| 397 | */ |
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| 398 | public function getMessagesSince($fromUid, $toUid) { |
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| 399 | $query = new Horde_Imap_Client_Search_Query(); |
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| 400 | $query->ids(new Horde_Imap_Client_Ids("$fromUid:$toUid")); |
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| 401 | return $this->getMessages(-1, -1, $query); |
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| 402 | } |
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| 403 | |||
| 404 | /** |
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| 405 | * @return Horde_Imap_Client_Mailbox |
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| 406 | */ |
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| 407 | public function getHordeMailBox() { |
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| 410 | |||
| 411 | } |
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| 412 |