refactor: apply DisallowedEmptyRuleFixerRector

rector.php

@@ -23,6 +23,7 @@
 use Rector\CodeQuality\Rector\If_\ShortenElseIfRector;
 use Rector\CodeQuality\Rector\If_\SimplifyIfElseToTernaryRector;
 use Rector\CodeQuality\Rector\If_\SimplifyIfReturnBoolRector;
+use Rector\CodeQuality\Rector\Ternary\TernaryEmptyArrayArrayDimFetchToCoalesceRector;
 use Rector\CodeQuality\Rector\Ternary\UnnecessaryTernaryExpressionRector;
 use Rector\CodingStyle\Rector\ClassMethod\FuncGetArgsToVariadicParamRector;
 use Rector\CodingStyle\Rector\ClassMethod\MakeInheritedMethodVisibilitySameAsParentRector;
@@ -43,7 +44,9 @@
 use Rector\Privatization\Rector\Property\PrivatizeFinalClassPropertyRector;
 use Rector\Set\ValueObject\LevelSetList;
 use Rector\Set\ValueObject\SetList;
+use Rector\Strict\Rector\Empty_\DisallowedEmptyRuleFixerRector;
 use Rector\Strict\Rector\If_\BooleanInIfConditionRuleFixerRector;
+use Rector\TypeDeclaration\Rector\Empty_\EmptyOnNullableObjectToInstanceOfRector;
 use Utils\Rector\PassStrictParameterToFunctionParameterRector;
 use Utils\Rector\RemoveErrorSuppressInTryCatchStmtsRector;
 use Utils\Rector\UnderscoreToCamelCaseVariableNameRector;
@@ -139,6 +142,9 @@
     $rectorConfig->rule(MakeInheritedMethodVisibilitySameAsParentRector::class);
     $rectorConfig->rule(SimplifyEmptyArrayCheckRector::class);
     $rectorConfig->rule(SimplifyEmptyCheckOnEmptyArrayRector::class);
+    $rectorConfig->rule(TernaryEmptyArrayArrayDimFetchToCoalesceRector::class);
+    $rectorConfig->rule(EmptyOnNullableObjectToInstanceOfRector::class);
+    $rectorConfig->rule(DisallowedEmptyRuleFixerRector::class);
     $rectorConfig->rule(StringClassNameToClassConstantRector::class);
     $rectorConfig->rule(PrivatizeFinalClassPropertyRector::class);
     $rectorConfig->rule(CompleteDynamicPropertiesRector::class);

system/API/ResponseTrait.php

@@ -94,7 +94,7 @@ protected function respond($data = null, ?int $status = null, string $message =
             $output = null;
             $this->format($data);
         } else {
-            $status = empty($status) ? 200 : $status;
+            $status ??= 200;
             $output = $this->format($data);
         }
 

system/Autoloader/FileLocator.php

@@ -35,14 +35,14 @@ public function __construct(Autoloader $autoloader)
      * Attempts to locate a file by examining the name for a namespace
      * and looking through the PSR-4 namespaced files that we know about.
      *
-     * @param string      $file   The relative file path or namespaced file to
-     *                            locate. If not namespaced, search in the app
-     *                            folder.
-     * @param string|null $folder The folder within the namespace that we should
-     *                            look for the file. If $file does not contain
-     *                            this value, it will be appended to the namespace
-     *                            folder.
-     * @param string      $ext    The file extension the file should have.
+     * @param string                $file   The relative file path or namespaced file to
+     *                                      locate. If not namespaced, search in the app
+     *                                      folder.
+     * @param non-empty-string|null $folder The folder within the namespace that we should
+     *                                      look for the file. If $file does not contain
+     *                                      this value, it will be appended to the namespace
+     *                                      folder.
+     * @param string                $ext    The file extension the file should have.
      *
      * @return false|string The path to the file, or false if not found.
      */
@@ -51,7 +51,7 @@ public function locateFile(string $file, ?string $folder = null, string $ext = '
         $file = $this->ensureExt($file, $ext);
 
         // Clears the folder name if it is at the beginning of the filename
-        if (! empty($folder) && strpos($file, $folder) === 0) {
+        if ($folder !== null && strpos($file, $folder) === 0) {
             $file = substr($file, strlen($folder . '/'));
         }
 
@@ -101,7 +101,7 @@ public function locateFile(string $file, ?string $folder = null, string $ext = '
             // If we have a folder name, then the calling function
             // expects this file to be within that folder, like 'Views',
             // or 'libraries'.
-            if (! empty($folder) && strpos($path . $filename, '/' . $folder . '/') === false) {
+            if ($folder !== null && strpos($path . $filename, '/' . $folder . '/') === false) {
                 $path .= trim($folder, '/') . '/';
             }
 
@@ -154,7 +154,7 @@ public function getClassname(string $file): string
             }
         }
 
-        if (empty($className)) {
+        if ($className === '') {
             return '';
         }
 
@@ -305,7 +305,7 @@ public function findQualifiedNameFromPath(string $path)
      */
     public function listFiles(string $path): array
     {
-        if (empty($path)) {
+        if ($path === '') {
             return [];
         }
 
@@ -338,7 +338,7 @@ public function listFiles(string $path): array
      */
     public function listNamespaceFiles(string $prefix, string $path): array
     {
-        if (empty($path) || empty($prefix)) {
+        if ($path === '' || ($prefix === '')) {
             return [];
         }
 
@@ -368,11 +368,13 @@ public function listNamespaceFiles(string $prefix, string $path): array
      * Checks the app folder to see if the file can be found.
      * Only for use with filenames that DO NOT include namespacing.
      *
+     * @param non-empty-string|null $folder
+     *
      * @return false|string The path to the file, or false if not found.
      */
     protected function legacyLocate(string $file, ?string $folder = null)
     {
-        $path = APPPATH . (empty($folder) ? $file : $folder . '/' . $file);
+        $path = APPPATH . ($folder === null ? $file : $folder . '/' . $file);
         $path = realpath($path) ?: $path;
 
         if (is_file($path)) {

system/BaseModel.php

@@ -1579,7 +1579,7 @@ public function getValidationMessages(): array
      */
     protected function cleanValidationRules(array $rules, ?array $row = null): array
     {
-        if (empty($row)) {
+        if ($row === null || $row === []) {
             return [];
         }
 
@@ -1795,7 +1795,7 @@ protected function transformDataToArray($row, string $type): array
         }
 
         // If it's still empty here, means $row is no change or is empty object
-        if (! $this->allowEmptyInserts && empty($row)) {
+        if (! $this->allowEmptyInserts && ($row === null || $row === [])) {
             throw DataException::forEmptyDataset($type);
         }
 

system/CLI/CLI.php

@@ -849,7 +849,7 @@ public static function showProgress($thisStep = 1, int $totalSteps = 10)
      */
     public static function wrap(?string $string = null, int $max = 0, int $padLeft = 0): string
     {
-        if (empty($string)) {
+        if ($string === null || $string === '') {
             return '';
         }
 

system/Cache/CacheFactory.php

@@ -40,6 +40,9 @@ class CacheFactory
     /**
      * Attempts to create the desired cache handler, based upon the
      *
+     * @param non-empty-string|null $handler
+     * @param non-empty-string|null $backup
+     *
      * @return CacheInterface
      */
     public static function getHandler(Cache $config, ?string $handler = null, ?string $backup = null)
@@ -52,8 +55,8 @@ public static function getHandler(Cache $config, ?string $handler = null, ?strin
             throw CacheException::forNoBackup();
         }
 
-        $handler = ! empty($handler) ? $handler : $config->handler;
-        $backup  = ! empty($backup) ? $backup : $config->backupHandler;
+        $handler ??= $config->handler;
+        $backup ??= $config->backupHandler;
 
         if (! array_key_exists($handler, $config->validHandlers) || ! array_key_exists($backup, $config->validHandlers)) {
             throw CacheException::forHandlerNotFound();

system/Common.php

@@ -288,20 +288,24 @@ function csrf_hash(): string
 if (! function_exists('csrf_field')) {
     /**
      * Generates a hidden input field for use within manually generated forms.
+     *
+     * @param non-empty-string|null $id
      */
     function csrf_field(?string $id = null): string
     {
-        return '<input type="hidden"' . (! empty($id) ? ' id="' . esc($id, 'attr') . '"' : '') . ' name="' . csrf_token() . '" value="' . csrf_hash() . '"' . _solidus() . '>';
+        return '<input type="hidden"' . ($id !== null ? ' id="' . esc($id, 'attr') . '"' : '') . ' name="' . csrf_token() . '" value="' . csrf_hash() . '"' . _solidus() . '>';
     }
 }
 
 if (! function_exists('csrf_meta')) {
     /**
      * Generates a meta tag for use within javascript calls.
+     *
+     * @param non-empty-string|null $id
      */
     function csrf_meta(?string $id = null): string
     {
-        return '<meta' . (! empty($id) ? ' id="' . esc($id, 'attr') . '"' : '') . ' name="' . csrf_header() . '" content="' . csrf_hash() . '"' . _solidus() . '>';
+        return '<meta' . ($id !== null ? ' id="' . esc($id, 'attr') . '"' : '') . ' name="' . csrf_header() . '" content="' . csrf_hash() . '"' . _solidus() . '>';
     }
 }
 
@@ -850,13 +854,13 @@ function old(string $key, $default = null, $escape = 'html')
      *
      * If more control is needed, you must use $response->redirect explicitly.
      *
-     * @param string|null $route Route name or Controller::method
+     * @param non-empty-string|null $route Route name or Controller::method
      */
     function redirect(?string $route = null): RedirectResponse
     {
         $response = Services::redirectresponse(null, true);
 
-        if (! empty($route)) {
+        if ($route !== null) {
             return $response->route($route);
         }
 
@@ -1121,15 +1125,17 @@ function stringify_attributes($attributes, bool $js = false): string
      * returns its return value if any.
      * Otherwise will start or stop the timer intelligently.
      *
+     * @param non-empty-string|null    $name
      * @param (callable(): mixed)|null $callable
      *
-     * @return Timer
+     * @return mixed|Timer
+     * @phpstan-return ($name is null ? Timer : ($callable is (callable(): mixed) ? mixed : Timer))
      */
     function timer(?string $name = null, ?callable $callable = null)
     {
         $timer = Services::timer();
 
-        if (empty($name)) {
+        if ($name === null) {
             return $timer;
         }
 

system/Database/BaseBuilder.php

@@ -318,7 +318,7 @@ public function __construct($tableName, ConnectionInterface $db, ?array $options
 
         $this->from($tableName);
 
-        if (! empty($options)) {
+        if ($options !== null && $options !== []) {
             foreach ($options as $key => $value) {
                 if (property_exists($this, $key)) {
                     $this->{$key} = $value;
@@ -920,6 +920,7 @@ public function orHavingNotIn(?string $key = null, $values = null, ?bool $escape
      * @used-by whereNotIn()
      * @used-by orWhereNotIn()
      *
+     * @param non-empty-string|null          $key
      * @param array|BaseBuilder|Closure|null $values The values searched on, or anonymous function with subquery
      *
      * @return $this
@@ -928,7 +929,7 @@ public function orHavingNotIn(?string $key = null, $values = null, ?bool $escape
      */
     protected function _whereIn(?string $key = null, $values = null, bool $not = false, string $type = 'AND ', ?bool $escape = null, string $clause = 'QBWhere')
     {
-        if (empty($key) || ! is_string($key)) {
+        if ($key === null || $key === '') {
             throw new InvalidArgumentException(sprintf('%s() expects $key to be a non-empty string', debug_backtrace(0, 2)[1]['function']));
         }
 
@@ -1434,7 +1435,7 @@ public function orHaving($key, $value = null, ?bool $escape = null)
     public function orderBy(string $orderBy, string $direction = '', ?bool $escape = null)
     {
         $qbOrderBy = [];
-        if (empty($orderBy)) {
+        if ($orderBy === '') {
             return $this;
         }
 
@@ -1490,7 +1491,7 @@ public function limit(?int $value = null, ?int $offset = 0)
             $this->QBLimit = $value;
         }
 
-        if (! empty($offset)) {
+        if ($offset !== null && $offset !== 0) {
             $this->QBOffset = $offset;
         }
 
@@ -1504,8 +1505,8 @@ public function limit(?int $value = null, ?int $offset = 0)
      */
     public function offset(int $offset)
     {
-        if (! empty($offset)) {
-            $this->QBOffset = (int) $offset;
+        if ($offset !== 0) {
+            $this->QBOffset = $offset;
         }
 
         return $this;
@@ -1736,7 +1737,7 @@ public function getWhere($where = null, ?int $limit = null, ?int $offset = 0, bo
             $this->where($where);
         }
 
-        if (! empty($limit)) {
+        if ($limit !== null && $limit !== 0) {
             $this->limit($limit, $offset);
         }
 
@@ -2452,7 +2453,7 @@ public function update($set = null, $where = null, ?int $limit = null): bool
             $this->where($where);
         }
 
-        if (! empty($limit)) {
+        if ($limit !== null && $limit !== 0) {
             if (! $this->canLimitWhereUpdates) {
                 throw new DatabaseException('This driver does not allow LIMITs on UPDATE queries using WHERE.');
             }
@@ -2762,7 +2763,7 @@ public function delete($where = '', ?int $limit = null, bool $resetData = true)
 
         $sql = $this->_delete($this->removeAlias($table));
 
-        if (! empty($limit)) {
+        if ($limit !== null && $limit !== 0) {
             $this->QBLimit = $limit;
         }
 
@@ -3172,7 +3173,7 @@ protected function compileGroupBy(): string
      */
     protected function compileOrderBy(): string
     {
-        if (is_array($this->QBOrderBy) && ! empty($this->QBOrderBy)) {
+        if (is_array($this->QBOrderBy) && $this->QBOrderBy !== []) {
             foreach ($this->QBOrderBy as &$orderBy) {
                 if ($orderBy['escape'] !== false && ! $this->isLiteral($orderBy['field'])) {
                     $orderBy['field'] = $this->db->protectIdentifiers($orderBy['field']);
@@ -3265,7 +3266,7 @@ protected function isLiteral(string $str): bool
     {
         $str = trim($str);
 
-        if (empty($str)
+        if ($str === ''
             || ctype_digit($str)
             || (string) (float) $str === $str
             || in_array(strtoupper($str), ['TRUE', 'FALSE'], true)

system/Database/Database.php

@@ -104,7 +104,7 @@ protected function parseDSN(array $params): array
             'database' => isset($dsn['path']) ? rawurldecode(substr($dsn['path'], 1)) : '',
         ];
 
-        if (! empty($dsn['query'])) {
+        if (isset($dsn['query']) && ($dsn['query'] !== '')) {
             parse_str($dsn['query'], $extra);
 
             foreach ($extra as $key => $val) {

system/Database/MigrationRunner.php

@@ -639,7 +639,7 @@ public function getHistory(string $group = 'default'): array
         $builder = $this->db->table($this->table);
 
         // If group was specified then use it
-        if (! empty($group)) {
+        if ($group !== '') {
             $builder->where('group', $group);
         }
 

system/Database/MySQLi/Connection.php

@@ -150,7 +150,7 @@ public function connect(bool $persistent = false)
                 $ssl['cipher'] = $this->encrypt['ssl_cipher'];
             }
 
-            if (! empty($ssl)) {
+            if ($ssl !== []) {
                 if (isset($this->encrypt['ssl_verify'])) {
                     if ($this->encrypt['ssl_verify']) {
                         if (defined('MYSQLI_OPT_SSL_VERIFY_SERVER_CERT')) {

system/Database/OCI8/Builder.php

@@ -166,7 +166,7 @@ protected function _truncate(string $table): string
      */
     public function delete($where = '', ?int $limit = null, bool $resetData = true)
     {
-        if (! empty($limit)) {
+        if ($limit !== null && $limit !== 0) {
             $this->QBLimit = $limit;
         }
 

system/Database/Postgre/Builder.php

@@ -229,7 +229,7 @@ protected function _insertBatch(string $table, array $keys, array $values): stri
      */
     public function delete($where = '', ?int $limit = null, bool $resetData = true)
     {
-        if (! empty($limit) || ! empty($this->QBLimit)) {
+        if ($limit !== null && $limit !== 0 || ! empty($this->QBLimit)) {
             throw new DatabaseException('PostgreSQL does not allow LIMITs on DELETE queries.');
         }
 

system/Database/SQLSRV/Builder.php

@@ -522,7 +522,7 @@ public function delete($where = '', ?int $limit = null, bool $resetData = true)
             return false; // @codeCoverageIgnore
         }
 
-        if (! empty($limit)) {
+        if ($limit !== null && $limit !== 0) {
             $this->QBLimit = $limit;
         }