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<?php |
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namespace Scaffolder\Compilers\Core; |
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use Carbon\Carbon; |
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use Illuminate\Support\Facades\File; |
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use Scaffolder\Compilers\AbstractCompiler; |
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use Scaffolder\Compilers\Support\FileToCompile; |
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use Scaffolder\Compilers\Support\PathParser; |
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class MigrationCompiler extends AbstractCompiler |
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{ |
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private $date; |
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protected $cachePrefix = 'migration_'; |
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protected $stubFilename = 'Migration.php' ; |
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public function __construct($scaffolderConfig, $modelData = null) |
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{ |
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$this->stubsDirectory = __DIR__ . '/../../../../stubs/Api/'; |
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parent::__construct($scaffolderConfig, $modelData); |
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$this->date = Carbon::now(); |
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} |
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/** |
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* Replace and store the Stub. |
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* |
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* @return string |
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*/ |
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public function replaceAndStore() |
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{ |
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return $this->addFields() |
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->store(new FileToCompile(false, $this->modelData->modelHash)); |
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} |
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/** |
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* Get output filename |
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* |
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* |
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* @return $this |
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*/ |
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protected function getOutputFilename() |
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{ |
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return PathParser::parse($this->scaffolderConfig->generator->paths->migrations) . $this->date->format('Y_m_d_') . str_pad($this->modelData->migrationOrder, 2, 0, STR_PAD_LEFT) . '_create_' . strtolower($this->modelName) . '_table.php'; |
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} |
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/** |
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* Add fields. |
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* |
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* @param $modelData |
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* |
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* @return $this |
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*/ |
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private function addFields() |
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{ |
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// Default primary key |
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$fields = "\t\t\t\$table->increments('id');" . PHP_EOL . PHP_EOL; |
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// Check primary key |
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# TODO FIX, primary |
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foreach ($this->modelData->fields as $field) |
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{ |
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$parsedModifiers = ''; |
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if($field->index == "primary") |
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continue ; |
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if($this->modelData->timeStamps && $field->name == "created_at") |
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continue ; |
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if($this->modelData->timeStamps && $field->name == "updated_at") |
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continue ; |
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// Check modifiers |
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if (!empty($field->modifiers)) |
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{ |
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$modifiersArray = explode(':', $field->modifiers); |
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foreach ($modifiersArray as $modifier) |
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{ |
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$modifierAndValue = explode(',', $modifier); |
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if (count($modifierAndValue) == 2) |
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{ |
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$parsedModifiers .= '->' . $modifierAndValue[0] . '(' . $modifierAndValue[1] . ')'; |
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} |
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else |
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{ |
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$parsedModifiers .= '->' . $modifierAndValue[0] . '()'; |
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} |
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} |
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} |
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// Check foreign key for unsigned modifier |
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if ($field->foreignKey) |
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{ |
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$parsedModifiers .= '->unsigned()'; |
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} |
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// Check indexes |
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if ($field->index != 'none') |
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{ |
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$fields .= sprintf("\t\t\t\$table->%s('%s')%s->%s();" . PHP_EOL, $field->type->db, $field->name, $parsedModifiers, $field->index); |
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} |
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else |
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{ |
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if ($field->type->db == "enum") { |
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$items = ''; |
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View Code Duplication |
foreach ($field->options as $key => $option) { |
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$items .= "'" . $option . "'"; |
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if ($key < (count($field->options) - 1)) |
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$items .= ", "; |
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} |
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$fields .= sprintf("\t\t\t\$table->%s('%s', array(%s));" . PHP_EOL, $field->type->db, $field->name, $items); |
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} |
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else |
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$fields .= sprintf("\t\t\t\$table->%s('%s')%s;" . PHP_EOL, $field->type->db, $field->name, $parsedModifiers); |
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} |
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// Check foreign key |
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if ($field->foreignKey) |
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{ |
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$fields .= sprintf("\t\t\t\$table->foreign('%s')->references('%s')->on('%s');" . PHP_EOL . PHP_EOL, $field->name, $field->foreignKey->field, $field->foreignKey->table); |
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} |
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} |
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if($this->modelData->timeStamps) |
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$fields .= PHP_EOL . "\t\t\t\$table->timestamps();" . PHP_EOL; |
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$this->stub = str_replace('{{fields}}', $fields, $this->stub); |
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return $this; |
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} |
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} |
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_function
expects aPost
object, and outputs the author of the post. The base classPost
returns a simple string and outputting a simple string will work just fine. However, the child classBlogPost
which is a sub-type ofPost
instead decided to return anobject
, and is therefore violating the SOLID principles. If aBlogPost
were passed tomy_function
, PHP would not complain, but ultimately fail when executing thestrtoupper
call in its body.