Code clean up.

app/Repositories/Budget/BudgetRepository.php

@@ -18,7 +18,6 @@
  * You should have received a copy of the GNU General Public License
  * along with Firefly III.  If not, see <http://www.gnu.org/licenses/>.
  */
-
 declare(strict_types=1);
 
 namespace FireflyIII\Repositories\Budget;
@@ -42,9 +41,7 @@ use Navigation;
 use stdClass;
 
 /**
- * Class BudgetRepository
- *
- * @package FireflyIII\Repositories\Budget
+ * Class BudgetRepository.
  */
 class BudgetRepository implements BudgetRepositoryInterface
 {
@@ -133,7 +130,7 @@ class BudgetRepository implements BudgetRepositoryInterface
     }
 
     /**
-     * Filters entries from the result set generated by getBudgetPeriodReport
+     * Filters entries from the result set generated by getBudgetPeriodReport.
      *
      * @param Collection $set
      * @param int        $budgetId
@@ -155,7 +152,7 @@ class BudgetRepository implements BudgetRepositoryInterface
                 }
             );
             $amount = '0';
-            if (!is_null($result->first())) {
+            if (null !== $result->first()) {
                 $amount = $result->first()->sum_of_period;
             }
 
@@ -175,7 +172,7 @@ class BudgetRepository implements BudgetRepositoryInterface
     public function find(int $budgetId): Budget
     {
         $budget = $this->user->budgets()->find($budgetId);
-        if (is_null($budget)) {
+        if (null === $budget) {
             $budget = new Budget;
         }
 
@@ -214,7 +211,7 @@ class BudgetRepository implements BudgetRepositoryInterface
     {
         $oldest  = Carbon::create()->startOfYear();
         $journal = $budget->transactionJournals()->orderBy('date', 'ASC')->first();
-        if (!is_null($journal)) {
+        if (null !== $journal) {
             $oldest = $journal->date < $oldest ? $journal->date : $oldest;
         }
 
@@ -222,7 +219,7 @@ class BudgetRepository implements BudgetRepositoryInterface
             ->transactions()
             ->leftJoin('transaction_journals', 'transaction_journals.id', '=', 'transactions.id')
             ->orderBy('transaction_journals.date', 'ASC')->first(['transactions.*', 'transaction_journals.date']);
-        if (!is_null($transaction)) {
+        if (null !== $transaction) {
             $carbon = new Carbon($transaction->date);
             $oldest = $carbon < $oldest ? $carbon : $oldest;
         }
@@ -303,7 +300,7 @@ class BudgetRepository implements BudgetRepositoryInterface
                                       ->where('transaction_currency_id', $currency->id)
                                       ->where('start_date', $start->format('Y-m-d'))
                                       ->where('end_date', $end->format('Y-m-d'))->first();
-        if (!is_null($availableBudget)) {
+        if (null !== $availableBudget) {
             $amount = strval($availableBudget->amount);
         }
 
@@ -478,7 +475,7 @@ class BudgetRepository implements BudgetRepositoryInterface
                                       ->where('transaction_currency_id', $currency->id)
                                       ->where('start_date', $start->format('Y-m-d'))
                                       ->where('end_date', $end->format('Y-m-d'))->first();
-        if (is_null($availableBudget)) {
+        if (null === $availableBudget) {
             $availableBudget = new AvailableBudget;
             $availableBudget->user()->associate($this->user);
             $availableBudget->transactionCurrency()->associate($currency);
@@ -517,7 +514,7 @@ class BudgetRepository implements BudgetRepositoryInterface
         if ($accounts->count() > 0) {
             $collector->setAccounts($accounts);
         }
-        if ($accounts->count() === 0) {
+        if (0 === $accounts->count()) {
             $collector->setAllAssetAccounts();
         }
 
@@ -544,7 +541,7 @@ class BudgetRepository implements BudgetRepositoryInterface
         if ($accounts->count() > 0) {
             $collector->setAccounts($accounts);
         }
-        if ($accounts->count() === 0) {
+        if (0 === $accounts->count()) {
             $collector->setAllAssetAccounts();
         }
 
@@ -621,7 +618,7 @@ class BudgetRepository implements BudgetRepositoryInterface
                         ->first(['budget_limits.*']);
 
         // if more than 1 limit found, delete the others:
-        if ($limits > 1 && !is_null($limit)) {
+        if ($limits > 1 && null !== $limit) {
             $budget->budgetlimits()
                    ->where('budget_limits.start_date', $start->format('Y-m-d'))
                    ->where('budget_limits.end_date', $end->format('Y-m-d'))
@@ -629,13 +626,13 @@ class BudgetRepository implements BudgetRepositoryInterface
         }
 
         // delete if amount is zero.
-        if (!is_null($limit) && $amount <= 0.0) {
+        if (null !== $limit && $amount <= 0.0) {
             $limit->delete();
 
             return new BudgetLimit;
         }
         // update if exists:
-        if (!is_null($limit)) {
+        if (null !== $limit) {
             $limit->amount = $amount;
             $limit->save();