| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  | namespace SilverStripe\Blog\Model; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  | use SilverStripe\Control\Controller; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  | use SilverStripe\Forms\FieldList; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  | use SilverStripe\Forms\Tab; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  | use SilverStripe\Forms\TabSet; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  | use SilverStripe\Forms\TextField; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  | use SilverStripe\ORM\DataList; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  | use SilverStripe\ORM\ManyManyList; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  | use SilverStripe\ORM\ValidationResult; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  | use SilverStripe\Security\Member; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  | use SilverStripe\Security\Permission; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  | use SilverStripe\View\Parsers\URLSegmentFilter; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 |  |  |  * An object shared by BlogTag and BlogCategory. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  | trait BlogObject | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  | { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |      * @return ManyManyList|BlogPost[] | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  |     public function BlogPosts() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 |  |  |         $blogPosts = parent::BlogPosts(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  |         $this->extend('updateGetBlogPosts', $blogPosts); | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  |         return $blogPosts; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  |      * Get blog this tag was queried from | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  |      * @return Blog|null | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 |  |  |     public function Blog() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 42 |  |  |         $blogID = $this->getBlogID(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 |  |  |         if ($blogID) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 |  |  |             /** @var Blog $blog */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 45 |  |  |             $blog = Blog::get()->byID($blogID); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 46 |  |  |             return $blog; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 |  |  |         return null; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 50 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  |      * {@inheritdoc} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  |     public function getCMSFields() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 |  |  |         $fields = TabSet::create( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 |  |  |             'Root', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  |             Tab::create( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  |                 'Main', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  |                 TextField::create('Title', _t(__CLASS__ . '.Title', 'Title')) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  |             ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 |  |  |         $fields = FieldList::create($fields); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 65 |  |  |         $this->extend('updateCMSFields', $fields); | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 66 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 67 |  |  |         return $fields; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 68 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 69 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 70 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 71 |  |  |      * Number of times this object has blog posts in the current blog | 
            
                                                                                                            
                            
            
                                    
            
            
                | 72 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 73 |  |  |      * @return int | 
            
                                                                                                            
                            
            
                                    
            
            
                | 74 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 75 |  |  |     public function getBlogCount() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 76 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 77 |  |  |         $blog = $this->Blog(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 78 |  |  |         if (!$blog) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 79 |  |  |             return 0; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 80 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 81 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 82 |  |  |         return $this | 
            
                                                                                                            
                            
            
                                    
            
            
                | 83 |  |  |             ->BlogPosts() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 84 |  |  |             ->filter(['ParentID' => $blog->ID]) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 85 |  |  |             ->Count(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 86 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 87 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 88 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 89 |  |  |      * {@inheritdoc} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 90 |  |  |      * @return ValidationResult | 
            
                                                                                                            
                            
            
                                    
            
            
                | 91 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 92 |  |  |     public function validate() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  |         /** @var ValidationResult $validation */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 |  |  |         $validation = parent::validate(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 96 |  |  |         if (!$validation->isValid()) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 97 |  |  |             return $validation; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 98 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 99 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 100 |  |  |         if ($this->getDuplicatesByField('Title')->count() > 0) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 101 |  |  |             $validation->addError($this->getDuplicateError(), self::DUPLICATE_EXCEPTION); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 102 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 103 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 104 |  |  |         return $validation; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 105 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 106 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 107 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 108 |  |  |      * Returns a relative link to this category or tag | 
            
                                                                                                            
                            
            
                                    
            
            
                | 109 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 110 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 111 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 112 |  |  |     public function getLink() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 113 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 114 |  |  |         $blog = $this->Blog(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 115 |  |  |         if (!$blog) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 116 |  |  |             return null; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 117 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 118 |  |  |         return Controller::join_links( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 119 |  |  |             $blog->Link(), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 120 |  |  |             $this->getListUrlSegment(), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 121 |  |  |             $this->URLSegment | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 122 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 123 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 124 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 125 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 126 |  |  |      * Inherits from the parent blog or can be overwritten using a DataExtension. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 127 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 128 |  |  |      * @param null|Member $member | 
            
                                                                                                            
                            
            
                                    
            
            
                | 129 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 130 |  |  |      * @return bool | 
            
                                                                                                            
                            
            
                                    
            
            
                | 131 |  |  |      */ | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 132 |  | View Code Duplication |     public function canView($member = null) | 
                            
                    |  |  |  | 
                                                                                        
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                | 133 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 134 |  |  |         $extended = $this->extendedCan(__FUNCTION__, $member); | 
                            
                    |  |  |  | 
                                                                                        
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                | 135 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 136 |  |  |         if ($extended !== null) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 137 |  |  |             return $extended; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 138 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 139 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 140 |  |  |         $blog = $this->Blog(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 141 |  |  |         return $blog && $blog->canView($member); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 142 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 143 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 144 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 145 |  |  |      * {@inheritdoc} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 146 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 147 |  |  |     public function canCreate($member = null, $context = []) | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 148 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 149 |  |  |         $extended = $this->extendedCan(__FUNCTION__, $member); | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 150 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 151 |  |  |         if ($extended !== null) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 152 |  |  |             return $extended; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 153 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 154 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 155 |  |  |         $permission = Blog::config()->grant_user_permission; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 156 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 157 |  |  |         return Permission::checkMember($member, $permission); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 158 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 159 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 160 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 161 |  |  |      * Inherits from the parent blog or can be overwritten using a DataExtension. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 162 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 163 |  |  |      * @param null|Member $member | 
            
                                                                                                            
                            
            
                                    
            
            
                | 164 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 165 |  |  |      * @return bool | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 166 |  |  |      */ | 
            
                                                                        
                            
            
                                                                    
                                                                                                        
            
            
                | 167 |  | View Code Duplication |     public function canDelete($member = null) | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                        
                            
            
                                    
            
            
                | 168 |  |  |     { | 
            
                                                                        
                            
            
                                    
            
            
                | 169 |  |  |         $extended = $this->extendedCan(__FUNCTION__, $member); | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                        
                            
            
                                    
            
            
                | 170 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 171 |  |  |         if ($extended !== null) { | 
            
                                                                        
                            
            
                                    
            
            
                | 172 |  |  |             return $extended; | 
            
                                                                        
                            
            
                                    
            
            
                | 173 |  |  |         } | 
            
                                                                        
                            
            
                                    
            
            
                | 174 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 175 |  |  |         $blog = $this->Blog(); | 
            
                                                                        
                            
            
                                    
            
            
                | 176 |  |  |         return $blog && $blog->canDelete($member); | 
            
                                                                        
                            
            
                                    
            
            
                | 177 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 178 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 179 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 180 |  |  |      * Inherits from the parent blog or can be overwritten using a DataExtension. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 181 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 182 |  |  |      * @param null|Member $member | 
            
                                                                                                            
                            
            
                                    
            
            
                | 183 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 184 |  |  |      * @return bool | 
            
                                                                                                            
                            
            
                                    
            
            
                | 185 |  |  |      */ | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 186 |  | View Code Duplication |     public function canEdit($member = null) | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 187 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 188 |  |  |         $extended = $this->extendedCan(__FUNCTION__, $member); | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 189 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 190 |  |  |         if ($extended !== null) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 191 |  |  |             return $extended; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 192 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 193 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 194 |  |  |         $blog = $this->Blog(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 195 |  |  |         return $blog && $blog->canEdit($member); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 196 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 197 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 198 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 199 |  |  |      * @return mixed | 
            
                                                                                                            
                            
            
                                    
            
            
                | 200 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 201 |  |  |     public function getBlogID() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 202 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 203 |  |  |         return $this->getSourceQueryParam('BlogID'); | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 204 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 205 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 206 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 207 |  |  |      * Set a blog ID for this record | 
            
                                                                                                            
                            
            
                                    
            
            
                | 208 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 209 |  |  |      * @param int $id | 
            
                                                                                                            
                            
            
                                    
            
            
                | 210 |  |  |      * @return $this | 
            
                                                                                                            
                            
            
                                    
            
            
                | 211 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 212 |  |  |     public function setBlogID($id) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 213 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 214 |  |  |         $this->setSourceQueryParam('BlogID', $id); | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 215 |  |  |         return $this; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 216 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 217 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 218 |  |  |     protected function onBeforeWrite() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 219 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 220 |  |  |         parent::onBeforeWrite(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 221 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 222 |  |  |         if ($this->exists() || empty($this->URLSegment)) { | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 223 |  |  |             $this->generateURLSegment(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 224 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 225 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 226 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 227 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 228 |  |  |      * Generates a unique URLSegment from the title. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 229 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 230 |  |  |      * @param int $increment | 
            
                                                                                                            
                            
            
                                    
            
            
                | 231 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 232 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 233 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 234 |  |  |     public function generateURLSegment($increment = 0) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 235 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 236 |  |  |         $increment = (int)$increment; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 237 |  |  |         $filter = URLSegmentFilter::create(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 238 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 239 |  |  |         // Setting this to on. Because of the UI flow, it would be quite a lot of work | 
            
                                                                                                            
                            
            
                                    
            
            
                | 240 |  |  |         // to support turning this off. (ie. the add by title flow would not work). | 
            
                                                                                                            
                            
            
                                    
            
            
                | 241 |  |  |         // If this becomes a problem we can approach it then. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 242 |  |  |         // @see https://github.com/silverstripe/silverstripe-blog/issues/376 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 243 |  |  |         $filter->setAllowMultibyte(true); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 244 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 245 |  |  |         $this->URLSegment = $filter->filter($this->Title); | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 246 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 247 |  |  |         if ($increment > 0) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 248 |  |  |             $this->URLSegment .= '-' . $increment; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 249 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 250 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 251 |  |  |         if ($this->getDuplicatesByField('URLSegment')->count() > 0) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 252 |  |  |             $this->generateURLSegment($increment + 1); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 253 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 254 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 255 |  |  |         return $this->URLSegment; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 256 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 257 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 258 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 259 |  |  |      * Looks for objects o the same type and the same value by the given Field | 
            
                                                                                                            
                            
            
                                    
            
            
                | 260 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 261 |  |  |      * @param  string $field E.g. URLSegment or Title | 
            
                                                                                                            
                            
            
                                    
            
            
                | 262 |  |  |      * @return DataList | 
            
                                                                                                            
                            
            
                                    
            
            
                | 263 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 264 |  |  |     protected function getDuplicatesByField($field) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 265 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 266 |  |  |         $duplicates = DataList::create(self::class) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 267 |  |  |             ->filter([$field => $this->$field]); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 268 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 269 |  |  |         if ($this->ID) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 270 |  |  |             $duplicates = $duplicates->exclude('ID', $this->ID); | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 271 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 272 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 273 |  |  |         return $duplicates; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 274 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 275 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 276 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 277 |  |  |      * This returns the url segment for the listing page. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 278 |  |  |      * eg. 'categories' in /my-blog/categories/category-url | 
            
                                                                                                            
                            
            
                                    
            
            
                | 279 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 280 |  |  |      * This is not editable at the moment, but a method is being used incase we want | 
            
                                                                                                            
                            
            
                                    
            
            
                | 281 |  |  |      * to make it editable in the future. We can use this method to provide logic | 
            
                                                                                                            
                            
            
                                    
            
            
                | 282 |  |  |      * without replacing multiple areas of the code base. We're also not being opinionated | 
            
                                                                                                            
                            
            
                                    
            
            
                | 283 |  |  |      * about how the segment should be obtained at the moment and allowing for the | 
            
                                                                                                            
                            
            
                                    
            
            
                | 284 |  |  |      * implementation to decide. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 285 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 286 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 287 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 288 |  |  |     abstract protected function getListUrlSegment(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 289 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 290 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 291 |  |  |      * Returns an error message for this object when it tries to write a duplicate. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 292 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 293 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 294 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 295 |  |  |     abstract protected function getDuplicateError(); | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 296 |  |  | } | 
            
                                                        
            
                                    
            
            
                | 297 |  |  |  | 
            
                        
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.