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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| 39 | trait QueryTrait |
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| 40 | { |
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| 41 | /** |
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| 42 | * Returns collection of active projects. |
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| 43 | * |
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| 44 | * @return Eloquent\Collection |
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| 45 | */ |
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| 46 | public static function activeProjects() |
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| 52 | |||
| 53 | /** |
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| 54 | * Returns collection of public projects. |
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| 55 | * |
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| 56 | * @return Eloquent\Collection |
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| 57 | */ |
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| 58 | public function publicProjects() |
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| 59 | { |
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| 60 | return $this->where('private', '=', Project::PRIVATE_NO) |
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| 61 | ->orderBy('name', 'ASC') |
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| 62 | ->get(); |
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| 63 | } |
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| 64 | |||
| 65 | /** |
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| 66 | * Returns all users that are not assigned in the current project. |
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| 67 | * |
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| 68 | * @return array |
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| 69 | */ |
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| 70 | 1 | public function usersNotIn() |
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| 81 | |||
| 82 | /** |
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| 83 | * Fetch and filter issues in the project. |
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| 84 | * |
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| 85 | * @param int $status |
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| 86 | * @param array $filter |
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| 87 | * |
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| 88 | * @return \Illuminate\Database\Eloquent\Collection |
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| 89 | */ |
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| 90 | 2 | public function listIssues($status = Project\Issue::STATUS_OPEN, array $filter = []) |
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| 120 | |||
| 121 | /** |
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| 122 | * Fetch issues assigned to a user. |
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| 123 | * |
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| 124 | * @param User $user |
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| 125 | * |
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| 126 | * @return \Illuminate\Database\Eloquent\Collection |
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| 127 | */ |
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| 128 | 1 | public function listAssignedOrCreatedIssues(User $user) |
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| 139 | |||
| 140 | /** |
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| 141 | * Returns projects with issues details eager loaded. |
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| 142 | * |
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| 143 | * @param int $status |
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| 144 | * @param int $private |
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| 145 | * |
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| 146 | * @return Relations\HasMany |
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| 147 | */ |
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| 148 | 4 | public function projectsWidthIssues($status = Project::STATUS_OPEN, $private = Project::PRIVATE_NO) |
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| 149 | { |
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| 150 | $query = $this |
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| 151 | 4 | ->where('status', '=', $status) |
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| 152 | 4 | ->orderBy('name'); |
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| 153 | |||
| 154 | 4 | if ($private !== Project::PRIVATE_ALL) { |
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| 155 | 4 | $query->where('private', '=', $private); |
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| 156 | } |
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| 157 | |||
| 158 | 4 | $query->with([ |
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| 159 | View Code Duplication | 'issues' => function (Relations\Relation $query) use ($status) { |
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| 160 | 3 | $query->with('updatedBy'); |
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| 161 | 3 | if ($status === Project::STATUS_OPEN) { |
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| 162 | 3 | $query->where('status', '=', Project\Issue::STATUS_OPEN); |
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| 163 | } |
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| 164 | 4 | }, |
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| 165 | 'issues.user' => function () { |
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| 166 | 4 | }, |
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| 167 | 'issues.countComments' => function () { |
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| 168 | 4 | }, |
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| 169 | ]); |
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| 170 | |||
| 171 | 4 | return $query; |
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| 172 | } |
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| 173 | |||
| 174 | /** |
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| 175 | * Returns collection of tags for Kanban view. |
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| 176 | * |
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| 177 | * @param User $user |
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| 178 | * |
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| 179 | * @return mixed |
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| 180 | */ |
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| 181 | public function getKanbanTagsForUser(User $user) |
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| 192 | |||
| 193 | /** |
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| 194 | * Returns collection of issues grouped by tags. |
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| 195 | * |
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| 196 | * @param $tagIds |
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| 197 | * |
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| 198 | * @return mixed |
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| 199 | */ |
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| 200 | public function issuesGroupByTags($tagIds) |
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| 215 | |||
| 216 | /** |
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| 217 | * Returns users assigned to the project that can fix issues (with edit permission). |
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| 218 | * |
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| 219 | * @return Relations\BelongsToMany |
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| 220 | */ |
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| 221 | 17 | public function usersCanFixIssue() |
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| 225 | } |
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| 226 |
This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idableprovides a methodequalsIdthat in turn relies on the methodgetId(). If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()as an abstract method to the trait will make sure it is available.