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:
Complex classes like Event 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 Event, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 30 | class Event extends Component |
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| 31 | { |
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| 32 | const TIME_TRANSPARENCY_OPAQUE = 'OPAQUE'; |
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| 33 | const TIME_TRANSPARENCY_TRANSPARENT = 'TRANSPARENT'; |
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| 34 | |||
| 35 | const STATUS_TENTATIVE = 'TENTATIVE'; |
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| 36 | const STATUS_CONFIRMED = 'CONFIRMED'; |
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| 37 | const STATUS_CANCELLED = 'CANCELLED'; |
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| 38 | |||
| 39 | const MS_BUSYSTATUS_FREE = 'FREE'; |
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| 40 | const MS_BUSYSTATUS_TENTATIVE = 'TENTATIVE'; |
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| 41 | const MS_BUSYSTATUS_BUSY = 'BUSY'; |
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| 42 | const MS_BUSYSTATUS_OOF = 'OOF'; |
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| 43 | |||
| 44 | /** |
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| 45 | * @var string |
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| 46 | */ |
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| 47 | protected $uniqueId; |
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| 48 | |||
| 49 | /** |
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| 50 | * The property indicates the date/time that the instance of |
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| 51 | * the iCalendar object was created. |
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| 52 | * |
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| 53 | * The value MUST be specified in the UTC time format. |
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| 54 | * |
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| 55 | * @var \DateTime |
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| 56 | */ |
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| 57 | protected $dtStamp; |
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| 58 | |||
| 59 | /** |
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| 60 | * @var \DateTime |
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| 61 | */ |
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| 62 | protected $dtStart; |
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| 63 | |||
| 64 | /** |
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| 65 | * Preferentially chosen over the duration if both are set. |
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| 66 | * |
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| 67 | * @var \DateTime |
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| 68 | */ |
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| 69 | protected $dtEnd; |
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| 70 | |||
| 71 | /** |
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| 72 | * @var \DateInterval |
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| 73 | */ |
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| 74 | protected $duration; |
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| 75 | |||
| 76 | /** |
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| 77 | * @var bool |
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| 78 | */ |
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| 79 | protected $noTime = false; |
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| 80 | |||
| 81 | /** |
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| 82 | * @var string |
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| 83 | */ |
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| 84 | protected $msBusyStatus = null; |
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| 85 | |||
| 86 | /** |
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| 87 | * @var string |
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| 88 | */ |
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| 89 | protected $url; |
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| 90 | |||
| 91 | /** |
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| 92 | * @var string |
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| 93 | */ |
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| 94 | protected $location; |
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| 95 | |||
| 96 | /** |
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| 97 | * @var string |
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| 98 | */ |
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| 99 | protected $locationTitle; |
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| 100 | |||
| 101 | /** |
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| 102 | * @var Geo |
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| 103 | */ |
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| 104 | protected $locationGeo; |
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| 105 | |||
| 106 | /** |
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| 107 | * @var string |
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| 108 | */ |
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| 109 | protected $summary; |
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| 110 | |||
| 111 | /** |
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| 112 | * @var Organizer |
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| 113 | */ |
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| 114 | protected $organizer; |
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| 115 | |||
| 116 | /** |
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| 117 | * @see https://tools.ietf.org/html/rfc5545#section-3.8.2.7 |
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| 118 | * |
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| 119 | * @var string |
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| 120 | */ |
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| 121 | protected $transparency = self::TIME_TRANSPARENCY_OPAQUE; |
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| 122 | |||
| 123 | /** |
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| 124 | * If set to true the timezone will be added to the event. |
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| 125 | * |
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| 126 | * @var bool |
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| 127 | */ |
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| 128 | protected $useTimezone = false; |
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| 129 | |||
| 130 | /** |
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| 131 | * If set will be used as the timezone identifier. |
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| 132 | * |
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| 133 | * @var string |
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| 134 | */ |
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| 135 | protected $timezoneString = ''; |
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| 136 | |||
| 137 | /** |
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| 138 | * @var int |
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| 139 | */ |
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| 140 | protected $sequence = 0; |
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| 141 | |||
| 142 | /** |
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| 143 | * @var Attendees |
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| 144 | */ |
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| 145 | protected $attendees; |
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| 146 | |||
| 147 | /** |
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| 148 | * @var string |
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| 149 | */ |
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| 150 | protected $description; |
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| 151 | |||
| 152 | /** |
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| 153 | * @var string |
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| 154 | */ |
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| 155 | protected $descriptionHTML; |
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| 156 | |||
| 157 | /** |
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| 158 | * @var string |
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| 159 | */ |
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| 160 | protected $status; |
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| 161 | |||
| 162 | /** |
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| 163 | * @var RecurrenceRule |
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| 164 | */ |
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| 165 | protected $recurrenceRule; |
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| 166 | |||
| 167 | /** |
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| 168 | * @var array |
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| 169 | */ |
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| 170 | protected $recurrenceRules = []; |
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| 171 | |||
| 172 | /** |
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| 173 | * This property specifies the date and time that the calendar |
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| 174 | * information was created. |
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| 175 | * |
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| 176 | * The value MUST be specified in the UTC time format. |
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| 177 | * |
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| 178 | * @var \DateTime |
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| 179 | */ |
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| 180 | protected $created; |
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| 181 | |||
| 182 | /** |
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| 183 | * The property specifies the date and time that the information |
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| 184 | * associated with the calendar component was last revised. |
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| 185 | * |
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| 186 | * The value MUST be specified in the UTC time format. |
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| 187 | * |
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| 188 | * @var \DateTime |
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| 189 | */ |
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| 190 | protected $modified; |
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| 191 | |||
| 192 | /** |
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| 193 | * Indicates if the UTC time should be used or not. |
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| 194 | * |
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| 195 | * @var bool |
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| 196 | */ |
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| 197 | protected $useUtc = true; |
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| 198 | |||
| 199 | /** |
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| 200 | * @var bool |
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| 201 | */ |
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| 202 | protected $cancelled; |
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| 203 | |||
| 204 | /** |
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| 205 | * This property is used to specify categories or subtypes |
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| 206 | * of the calendar component. The categories are useful in searching |
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| 207 | * for a calendar component of a particular type and category. |
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| 208 | * |
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| 209 | * @see https://tools.ietf.org/html/rfc5545#section-3.8.1.2 |
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| 210 | * |
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| 211 | * @var array |
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| 212 | */ |
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| 213 | protected $categories; |
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| 214 | |||
| 215 | /** |
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| 216 | * https://tools.ietf.org/html/rfc5545#section-3.8.1.3. |
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| 217 | * |
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| 218 | * @var bool |
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| 219 | */ |
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| 220 | protected $isPrivate = false; |
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| 221 | |||
| 222 | /** |
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| 223 | * Dates to be excluded from a series of events. |
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| 224 | * |
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| 225 | * @var \DateTimeInterface[] |
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| 226 | */ |
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| 227 | protected $exDates = []; |
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| 228 | |||
| 229 | /** |
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| 230 | * @var RecurrenceId |
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| 231 | */ |
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| 232 | protected $recurrenceId; |
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| 233 | |||
| 234 | /** |
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| 235 | * @var Attachment[] |
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| 236 | */ |
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| 237 | protected $attachments = []; |
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| 238 | |||
| 239 | 28 | public function __construct(string $uniqueId = null) |
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| 248 | |||
| 249 | /** |
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| 250 | * {@inheritdoc} |
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| 251 | */ |
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| 252 | 7 | public function getType() |
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| 256 | |||
| 257 | /** |
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| 258 | * {@inheritdoc} |
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| 259 | */ |
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| 260 | 18 | public function buildPropertyBag() |
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| 396 | |||
| 397 | /** |
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| 398 | * @param $dtEnd |
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| 399 | * |
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| 400 | * @return $this |
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| 401 | */ |
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| 402 | 5 | public function setDtEnd($dtEnd) |
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| 408 | |||
| 409 | 2 | public function getDtEnd() |
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| 413 | |||
| 414 | 5 | public function setDtStart($dtStart) |
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| 420 | |||
| 421 | 2 | public function getDtStart() |
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| 425 | |||
| 426 | /** |
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| 427 | * @param $dtStamp |
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| 428 | * |
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| 429 | * @return $this |
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| 430 | */ |
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| 431 | 1 | public function setDtStamp($dtStamp) |
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| 437 | |||
| 438 | /** |
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| 439 | * @param $duration |
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| 440 | * |
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| 441 | * @return $this |
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| 442 | */ |
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| 443 | 1 | public function setDuration($duration) |
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| 449 | |||
| 450 | /** |
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| 451 | * @param string $location |
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| 452 | * @param string $title |
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| 453 | * @param Geo|string $geo |
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| 454 | * |
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| 455 | * @return $this |
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| 456 | */ |
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| 457 | 3 | public function setLocation($location, $title = '', $geo = null) |
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| 472 | |||
| 473 | /** |
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| 474 | * @return $this |
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| 475 | */ |
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| 476 | 1 | public function setGeoLocation(Geo $geoProperty) |
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| 482 | |||
| 483 | /** |
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| 484 | * @param $noTime |
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| 485 | * |
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| 486 | * @return $this |
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| 487 | */ |
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| 488 | 1 | public function setNoTime($noTime) |
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| 494 | |||
| 495 | /** |
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| 496 | * @param $msBusyStatus |
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| 497 | * |
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| 498 | * @return $this |
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| 499 | * |
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| 500 | * @throws \InvalidArgumentException |
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| 501 | */ |
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| 502 | 2 | View Code Duplication | public function setMsBusyStatus($msBusyStatus) |
| 517 | |||
| 518 | /** |
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| 519 | * @return string|null |
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| 520 | */ |
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| 521 | 1 | public function getMsBusyStatus() |
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| 525 | |||
| 526 | /** |
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| 527 | * @param int $sequence |
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| 528 | * |
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| 529 | * @return $this |
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| 530 | */ |
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| 531 | 2 | public function setSequence($sequence) |
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| 537 | |||
| 538 | /** |
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| 539 | * @return int |
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| 540 | */ |
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| 541 | 1 | public function getSequence() |
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| 545 | |||
| 546 | /** |
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| 547 | * @return $this |
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| 548 | */ |
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| 549 | 2 | public function setOrganizer(Organizer $organizer) |
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| 555 | |||
| 556 | /** |
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| 557 | * @param $summary |
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| 558 | * |
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| 559 | * @return $this |
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| 560 | */ |
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| 561 | 1 | public function setSummary($summary) |
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| 567 | |||
| 568 | /** |
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| 569 | * @param $uniqueId |
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| 570 | * |
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| 571 | * @return $this |
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| 572 | */ |
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| 573 | 1 | public function setUniqueId($uniqueId) |
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| 579 | |||
| 580 | /** |
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| 581 | * @return string |
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| 582 | */ |
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| 583 | 2 | public function getUniqueId() |
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| 587 | |||
| 588 | /** |
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| 589 | * @param $url |
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| 590 | * |
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| 591 | * @return $this |
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| 592 | */ |
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| 593 | 1 | public function setUrl($url) |
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| 599 | |||
| 600 | /** |
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| 601 | * @param $useTimezone |
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| 602 | * |
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| 603 | * @return $this |
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| 604 | */ |
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| 605 | public function setUseTimezone($useTimezone) |
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| 611 | |||
| 612 | /** |
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| 613 | * @return bool |
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| 614 | */ |
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| 615 | public function getUseTimezone() |
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| 619 | |||
| 620 | /** |
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| 621 | * @param $timezoneString |
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| 622 | * |
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| 623 | * @return $this |
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| 624 | */ |
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| 625 | 2 | public function setTimezoneString($timezoneString) |
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| 631 | |||
| 632 | /** |
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| 633 | * @return bool |
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| 634 | */ |
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| 635 | 1 | public function getTimezoneString() |
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| 639 | |||
| 640 | /** |
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| 641 | * @return $this |
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| 642 | */ |
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| 643 | public function setAttendees(Attendees $attendees) |
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| 649 | |||
| 650 | /** |
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| 651 | * @param string $attendee |
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| 652 | * @param array $params |
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| 653 | * |
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| 654 | * @return $this |
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| 655 | */ |
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| 656 | public function addAttendee($attendee, $params = []) |
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| 662 | |||
| 663 | public function getAttendees(): Attendees |
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| 667 | |||
| 668 | /** |
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| 669 | * @param $description |
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| 670 | * |
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| 671 | * @return $this |
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| 672 | */ |
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| 673 | 4 | public function setDescription($description) |
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| 679 | |||
| 680 | /** |
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| 681 | * @param $descriptionHTML |
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| 682 | * |
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| 683 | * @return $this |
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| 684 | */ |
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| 685 | public function setDescriptionHTML($descriptionHTML) |
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| 691 | |||
| 692 | /** |
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| 693 | * @param bool $useUtc |
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| 694 | * |
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| 695 | * @return $this |
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| 696 | */ |
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| 697 | public function setUseUtc($useUtc = true) |
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| 703 | |||
| 704 | /** |
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| 705 | * @return string |
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| 706 | */ |
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| 707 | public function getDescription() |
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| 711 | |||
| 712 | /** |
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| 713 | * @return string |
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| 714 | */ |
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| 715 | public function getDescriptionHTML() |
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| 719 | |||
| 720 | /** |
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| 721 | * @param $status |
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| 722 | * |
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| 723 | * @return $this |
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| 724 | */ |
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| 725 | public function setCancelled($status) |
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| 731 | |||
| 732 | /** |
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| 733 | * @param $transparency |
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| 734 | * |
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| 735 | * @return $this |
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| 736 | * |
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| 737 | * @throws \InvalidArgumentException |
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| 738 | */ |
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| 739 | View Code Duplication | public function setTimeTransparency($transparency) |
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| 752 | |||
| 753 | /** |
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| 754 | * @param $status |
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| 755 | * |
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| 756 | * @return $this |
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| 757 | * |
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| 758 | * @throws \InvalidArgumentException |
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| 759 | */ |
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| 760 | View Code Duplication | public function setStatus($status) |
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| 774 | |||
| 775 | /** |
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| 776 | * @deprecated Deprecated since version 0.11.0, to be removed in 1.0. Use addRecurrenceRule instead. |
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| 777 | * |
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| 778 | * @return $this |
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| 779 | */ |
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| 780 | public function setRecurrenceRule(RecurrenceRule $recurrenceRule) |
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| 788 | |||
| 789 | /** |
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| 790 | * @deprecated Deprecated since version 0.11.0, to be removed in 1.0. Use getRecurrenceRules instead. |
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| 791 | * |
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| 792 | * @return RecurrenceRule |
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| 793 | */ |
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| 794 | public function getRecurrenceRule() |
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| 800 | |||
| 801 | /** |
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| 802 | * @return $this |
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| 803 | */ |
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| 804 | public function addRecurrenceRule(RecurrenceRule $recurrenceRule) |
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| 810 | |||
| 811 | /** |
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| 812 | * @return array |
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| 813 | */ |
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| 814 | public function getRecurrenceRules() |
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| 818 | |||
| 819 | /** |
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| 820 | * @param $dtStamp |
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| 821 | * |
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| 822 | * @return $this |
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| 823 | */ |
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| 824 | public function setCreated($dtStamp) |
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| 830 | |||
| 831 | /** |
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| 832 | * @param $dtStamp |
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| 833 | * |
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| 834 | * @return $this |
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| 835 | */ |
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| 836 | public function setModified($dtStamp) |
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| 842 | |||
| 843 | /** |
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| 844 | * @param $categories |
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| 845 | * |
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| 846 | * @return $this |
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| 847 | */ |
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| 848 | public function setCategories($categories) |
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| 854 | |||
| 855 | /** |
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| 856 | * Sets the event privacy. |
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| 857 | * |
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| 858 | * @param bool $flag |
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| 859 | * |
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| 860 | * @return $this |
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| 861 | */ |
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| 862 | public function setIsPrivate($flag) |
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| 868 | |||
| 869 | /** |
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| 870 | * @return \Eluceo\iCal\Component\Event |
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| 871 | */ |
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| 872 | public function addExDate(\DateTimeInterface $dateTime) |
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| 878 | |||
| 879 | /** |
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| 880 | * @return \DateTimeInterface[] |
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| 881 | */ |
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| 882 | public function getExDates() |
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| 886 | |||
| 887 | /** |
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| 888 | * @param \DateTimeInterface[] |
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| 889 | * |
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| 890 | * @return \Eluceo\iCal\Component\Event |
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| 891 | */ |
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| 892 | public function setExDates(array $exDates) |
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| 898 | |||
| 899 | /** |
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| 900 | * @return \Eluceo\iCal\Property\Event\RecurrenceId |
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| 901 | */ |
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| 902 | public function getRecurrenceId() |
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| 906 | |||
| 907 | /** |
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| 908 | * @return \Eluceo\iCal\Component\Event |
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| 909 | */ |
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| 910 | public function setRecurrenceId(RecurrenceId $recurrenceId) |
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| 916 | |||
| 917 | /** |
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| 918 | * @param array $attachment |
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| 919 | * |
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| 920 | * @return $this |
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| 921 | */ |
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| 922 | 1 | public function addAttachment(Attachment $attachment) |
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| 928 | |||
| 929 | /** |
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| 930 | * @return array |
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| 931 | */ |
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| 932 | public function getAttachments() |
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| 936 | |||
| 937 | public function addUrlAttachment(string $url) |
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| 941 | } |
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| 942 |