Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
| 1 | <?php  | 
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| 40 | class TicketExtension extends DataExtension  | 
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| 41 | { | 
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| 42 | /**  | 
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| 43 | * @var CalendarEvent_Controller  | 
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| 44 | */  | 
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| 45 | protected $controller;  | 
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| 46 | |||
| 47 | private static $db = array(  | 
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| 48 | 'Capacity' => 'Int',  | 
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| 49 | 'OrderMin' => 'Int',  | 
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| 50 | 'OrderMax' => 'Int',  | 
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| 51 | 'SuccessMessage' => 'HTMLText',  | 
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| 52 | 'SuccessMessageMail' => 'HTMLText'  | 
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| 53 | );  | 
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| 54 | |||
| 55 | private static $has_many = array(  | 
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| 56 | 'Tickets' => 'Broarm\EventTickets\Ticket.Event',  | 
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| 57 | 'Reservations' => 'Broarm\EventTickets\Reservation.Event',  | 
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| 58 | 'Attendees' => 'Broarm\EventTickets\Attendee.Event',  | 
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| 59 | 'WaitingList' => 'Broarm\EventTickets\WaitingListRegistration.Event',  | 
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| 60 | 'Fields' => 'Broarm\EventTickets\UserField.Event'  | 
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| 61 | );  | 
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| 62 | |||
| 63 | private static $defaults = array(  | 
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| 64 | 'Capacity' => 50  | 
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| 65 | );  | 
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| 66 | |||
| 67 | private static $translate = array(  | 
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| 68 | 'SuccessMessage',  | 
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| 69 | 'SuccessMessageMail'  | 
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| 70 | );  | 
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| 71 | |||
| 72 | public function updateCMSFields(FieldList $fields)  | 
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| 119 | |||
| 120 | /**  | 
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| 121 | * Trigger actions after write  | 
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| 122 | */  | 
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| 123 | public function onAfterWrite()  | 
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| 128 | |||
| 129 | /**  | 
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| 130 | * Creates and sets up the default fields  | 
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| 131 | */  | 
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| 132 | public function createDefaultFields()  | 
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| 142 | |||
| 143 | /**  | 
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| 144 | * Extend the page actions with an start check in action  | 
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| 145 | *  | 
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| 146 | * @param FieldList $actions  | 
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| 147 | */  | 
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| 148 | public function updateCMSActions(FieldList $actions)  | 
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| 164 | |||
| 165 | /**  | 
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| 166 | * Get the leftover capacity  | 
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| 167 | *  | 
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| 168 | * @return int  | 
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| 169 | */  | 
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| 170 | public function getAvailability()  | 
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| 174 | |||
| 175 | /**  | 
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| 176 | * Check if the event is expired, either by unavailable tickets or because the date has passed  | 
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| 177 | *  | 
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| 178 | * @return bool  | 
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| 179 | */  | 
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| 180 | public function getEventExpired()  | 
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| 192 | |||
| 193 | /**  | 
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| 194 | * Get only the attendees who are certain to attend  | 
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| 195 | * Fixme: Using callback filter instead of join, because join gives ambiguous error on 'EventID'  | 
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| 196 | *  | 
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| 197 | * @return \ArrayList  | 
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| 198 | */  | 
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| 199 | public function getGuestList()  | 
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| 205 | |||
| 206 | /**  | 
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| 207 | * Get the success message  | 
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| 208 | *  | 
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| 209 | * @return mixed|string  | 
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| 210 | */  | 
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| 211 | View Code Duplication | public function getSuccessContent()  | 
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| 219 | |||
| 220 | /**  | 
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| 221 | * Get the mail message  | 
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| 222 | *  | 
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| 223 | * @return mixed|string  | 
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| 224 | */  | 
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| 225 | View Code Duplication | public function getMailContent()  | 
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| 233 | |||
| 234 | /**  | 
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| 235 | * Get the Ticket logo  | 
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| 236 | *  | 
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| 237 | * @return \Image  | 
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| 238 | */  | 
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| 239 | public function getMailLogo()  | 
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| 243 | |||
| 244 | /**  | 
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| 245 | * Check if the current event can have tickets  | 
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| 246 | *  | 
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| 247 | * @return bool  | 
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| 248 | */  | 
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| 249 | public function canCreateTickets()  | 
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| 258 | |||
| 259 | /**  | 
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| 260 | * Get the calendar controller  | 
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| 261 | *  | 
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| 262 | * @return CalendarEvent_Controller  | 
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| 263 | */  | 
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| 264 | public function getController()  | 
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| 270 | }  | 
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| 271 | 
This check marks private properties in classes that are never used. Those properties can be removed.