| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  | namespace Scaffolder\Compilers\AngularJs; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  | use Illuminate\Support\Facades\File; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  | use Scaffolder\Compilers\AbstractCompiler; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  | use Scaffolder\Compilers\Support\FileToCompile; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  | use Scaffolder\Compilers\Support\PathParser; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  | use Scaffolder\Support\Directory; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  | use Scaffolder\Support\CamelCase; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  | use Scaffolder\Support\Validator; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  | use stdClass ; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  | class ListTemplateCompiler extends AbstractCompiler | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  | { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  | 	protected $cachePrefix 	= 'list_template_'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  | 	protected $stubFilename = 'ListTemplate.html' ; | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 18 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 19 |  |  | 	public function __construct($scaffolderConfig, $modelData = null) | 
            
                                                                        
                            
            
                                    
            
            
                | 20 |  |  | 	{ | 
            
                                                                        
                            
            
                                    
            
            
                | 21 |  |  | 		$this->stubsDirectory = __DIR__ . '/../../../../stubs/AngularJs/'; | 
            
                                                                        
                            
            
                                    
            
            
                | 22 |  |  | 		parent::__construct($scaffolderConfig, $modelData); | 
            
                                                                        
                            
            
                                    
            
            
                | 23 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  | 	 * Replace and store the Stub. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 |  |  | 	 * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  | 	public function replaceAndStore() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  | 	{ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  | 		 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  | 		return $this->replaceInputFields() | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  | 					->replaceBelongsToManyFields() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 |  |  | 					->store(new FileToCompile(false, $this->modelData->modelHash)); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  | 		 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 |  |  | 	 * Replace input fields | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 42 |  |  | 	 * @return $this | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 |  |  | 	private function replaceInputFields(){ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 45 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 46 |  |  | 		$inputFields = $this->getInputFields(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 |  |  | 		$this->stub = str_replace('{{columns_inputs}}', $inputFields, $this->stub); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 50 |  |  | 		return $this; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  | 	 * get search conditions | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 |  |  | 	 * @return $this | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 58 |  | View Code Duplication | 	public function getInputFields(){ | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  | 		$inputFields = $eagerFields = ''; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  | 		foreach ($this->modelData->fields as $field) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 |  |  | 		{ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 |  |  | 			$fieldStub = $this->getInputStubByField($field); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 65 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 66 |  |  | 			if($field->foreignKey){ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 67 |  |  | 				$fieldStub 	= $this->replaceForeingStrings($field, $fieldStub) ; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 68 |  |  | 				$fieldStub = str_replace('{{foreign_model_name}}', strtolower(CamelCase::convertToCamelCase($field->foreignKey->table)), $fieldStub); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 69 |  |  | 			} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 70 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 71 |  |  | 			$inputFields .= $this->replaceFieldInput($field, $fieldStub) ; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 72 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 73 |  |  | 			// Check foreign key | 
            
                                                                                                            
                            
            
                                    
            
            
                | 74 |  |  | 			if ($field->foreignKey && isset($field->foreignKey->eager) && $field->foreignKey->eager) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 75 |  |  | 			{ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 76 |  |  | 				// search eager fields | 
            
                                                                                                            
                            
            
                                    
            
            
                | 77 |  |  | 				$foreignModelData = $this->getModelData($field->foreignKey->table); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 78 |  |  | 				$foreignControllerCompiler = new ListTemplateCompiler($this->scaffolderConfig, $foreignModelData); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 79 |  |  | 				$foreignControllerCompiler->setEagerTable($this->modelData->tableName); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 80 |  |  | 				$eagerFields 	.= $foreignControllerCompiler->getInputFields(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 81 |  |  | 			} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 82 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 83 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 84 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 85 |  |  | 		// replace table name | 
            
                                                                                                            
                            
            
                                    
            
            
                | 86 |  |  | 		$inputFields = str_replace('{{table_name}}', $this->modelData->tableName, $inputFields); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 87 |  |  | 		 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 88 |  |  | 		$this->stub = str_replace('{{eager_objects_inputs}}', $eagerFields, $this->stub);  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 89 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 90 |  |  | 		return $inputFields ; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 91 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 92 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 |  |  | 	 * replace field stub with fields and validations | 
            
                                                                                                            
                            
            
                                    
            
            
                | 96 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 97 |  |  | 	 * @param string $field | 
            
                                                                                                            
                            
            
                                    
            
            
                | 98 |  |  | 	 * @param string $fieldStub | 
            
                                                                                                            
                            
            
                                    
            
            
                | 99 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 100 |  |  | 	 * @return $this | 
            
                                                                                                            
                            
            
                                    
            
            
                | 101 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 102 |  |  | 	protected function replaceFieldInput($field, $fieldStub){ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 103 |  |  | 		$fieldStub = $this->replaceFieldStrings($field, $fieldStub) ; | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 104 |  |  | 		$fieldStub = $this->replaceFieldValidations($field, $fieldStub) ; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 105 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 106 |  |  | 		return $fieldStub ; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 107 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 108 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 109 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 110 |  |  | 	 * replace field stub with fields and validations | 
            
                                                                                                            
                            
            
                                    
            
            
                | 111 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 112 |  |  | 	 * @param string $field | 
            
                                                                                                            
                            
            
                                    
            
            
                | 113 |  |  | 	 * @param string $fieldStub | 
            
                                                                                                            
                            
            
                                    
            
            
                | 114 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 115 |  |  | 	 * @return $this | 
            
                                                                                                            
                            
            
                                    
            
            
                | 116 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 117 |  | View Code Duplication | 	protected function replaceFieldValidations($field, $fieldStub){ | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 118 |  |  | 		$fieldStub = $this->replaceFieldStrings($field, $fieldStub) ; | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 119 |  |  | 		 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 120 |  |  | 		$validationsConverted = Validator::convertValidations($field->validations, true); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 121 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 122 |  |  | 		$inputValidations = '' ;  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 123 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 124 |  |  | 		foreach ($validationsConverted as $attribute => $value) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 125 |  |  | 			if($value) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 126 |  |  | 				$inputValidations .=  ' '.$attribute.'="'. $value.'"' ; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 127 |  |  | 			else | 
            
                                                                                                            
                            
            
                                    
            
            
                | 128 |  |  | 				$inputValidations .=  ' '.$attribute  ;  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 129 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 130 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 131 |  |  | 		$fieldStub = str_replace('{{field_validation}}', $inputValidations, $fieldStub); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 132 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 133 |  |  | 		return $fieldStub ; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 134 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 135 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 136 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 137 |  |  | 	 * Replace belongs to many fields | 
            
                                                                                                            
                            
            
                                    
            
            
                | 138 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 139 |  |  | 	 * @return $this | 
            
                                                                                                            
                            
            
                                    
            
            
                | 140 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 141 |  |  | 	protected function replaceBelongsToManyFields() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 142 |  |  | 		 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 143 |  |  | 		$belongToManyFields = ''; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 144 |  |  | 		 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 145 |  |  | 		foreach ($this->modelData->reverseRelationships as $relationship) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 146 |  |  | 		{ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 147 |  |  | 			if ($relationship->type == "belongsToMany") { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 148 |  |  | 				$fieldStub = File::get($this->stubsDirectory . 'List/'. CamelCase::convertToCamelCase($relationship->ui). '.html'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 149 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 150 |  |  | 				$fieldStub = str_replace('{{related_table}}',CamelCase::convertToCamelCase($relationship->relatedTable), $fieldStub); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 151 |  |  | 				$fieldStub = str_replace('{{related_table_lw}}', strtolower(CamelCase::convertToCamelCase($relationship->relatedTable)), $fieldStub); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 152 |  |  | 				$fieldStub = str_replace('{{table_name}}', $this->modelData->tableName, $fieldStub); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 153 |  |  | 				$fieldStub = str_replace('{{related_table_lw_pl}}', CamelCase::pluralize(strtolower($relationship->relatedTable)), $fieldStub); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 154 |  |  | 				 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 155 |  |  | 				$belongToManyFields .= $fieldStub;	 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 156 |  |  | 			} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 157 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 158 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 159 |  |  | 		$this->stub = str_replace('{{belongs_to_many_inputs}}', $belongToManyFields, $this->stub);  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 160 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 161 |  |  | 		return $this; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 162 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 163 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 164 |  |  | 	 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 165 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 166 |  |  | 	 * get input field stub by ui type | 
            
                                                                                                            
                            
            
                                    
            
            
                | 167 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 168 |  |  | 	 * @param string $field | 
            
                                                                                                            
                            
            
                                    
            
            
                | 169 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 170 |  |  | 	 * @return $this | 
            
                                                                                                            
                            
            
                                    
            
            
                | 171 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 172 |  |  | 	private $inputStub = []; | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 173 |  | View Code Duplication | 	private function getInputStubByField($field){ | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 174 |  |  | 		 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 175 |  |  | 		if($field->index == 'primary'){ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 176 |  |  | 			$uiType = 'primary' ; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 177 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 178 |  |  | 		elseif(isset($field->foreignKey) && $field->foreignKey){ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 179 |  |  | 			if(isset($field->foreignKey->eager) && $field->foreignKey->eager) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 180 |  |  | 				$uiType = 'foreign_eager' ; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 181 |  |  | 			else  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 182 |  |  | 				$uiType = $field->type->ui ; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 183 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 184 |  |  | 		else { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 185 |  |  | 			$uiType = $field->type->ui ; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 186 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 187 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 188 |  |  | 		if(array_key_exists($uiType, $this->inputStub)){ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 189 |  |  | 			return $this->inputStub[$uiType]; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 190 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 191 |  |  | 		else { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 192 |  |  | 			$this->inputStub[$uiType] = File::get($this->stubsDirectory . 'List/'. CamelCase::convertToCamelCase($uiType). '.html'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 193 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 194 |  |  | 			return $this->inputStub[$uiType]; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 195 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 196 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 197 |  |  | 	 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 198 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 199 |  |  | 	 * Get output filename | 
            
                                                                                                            
                            
            
                                    
            
            
                | 200 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 201 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 202 |  |  | 	 * @return $this | 
            
                                                                                                            
                            
            
                                    
            
            
                | 203 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 204 |  |  | 	protected function getOutputFilename() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 205 |  |  | 	{ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 206 |  |  | 		$folder = PathParser::parse($this->scaffolderConfig->generator->paths->pages).$this->modelData->tableName.'/list/' ; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 207 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 208 |  |  | 		Directory::createIfNotExists($folder, 0755, true); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 209 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 210 |  |  | 		return $folder .$this->modelData->tableName . '_list.html'; | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 211 |  |  | 	} | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 212 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 213 |  |  | } | 
            
                        
If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design.
Let’s take a look at an example:
Our function
my_functionexpects aPostobject, and outputs the author of the post. The base classPostreturns a simple string and outputting a simple string will work just fine. However, the child classBlogPostwhich is a sub-type ofPostinstead decided to return anobject, and is therefore violating the SOLID principles. If aBlogPostwere passed tomy_function, PHP would not complain, but ultimately fail when executing thestrtouppercall in its body.