refactor(webstatement): improve code readability and consistency in ExportStatementJob

- Menambahkan tipe return untuk beberapa method agar lebih eksplisit dan konsisten.
- Memperbaiki indentasi dan alignment parameter untuk meningkatkan keterbacaan.
- Menghapus method `getTransaction` dan memindahkannya ke bagian akhir kode dengan dokumentasi ulang.
- Menambahkan logika untuk menghapus file CSV yang sudah ada sebelum membuat file baru di method `exportToCsv`.
- Mengoreksi format data dan whitespace pada beberapa bagian kode untuk menjaga standar penulisan.
- Memindahkan komentar terkait dokumentasi method ke posisi yang lebih relevan dan terstruktur.
- Memastikan konsistensi penggunaan tanda kurung kurawal dan spasi pada query database agar lebih seragam.

Signed-off-by: Daeng Deni Mardaeni <ddeni05@gmail.com>

app/Jobs/ExportStatementJob.php

@@ -67,7 +67,8 @@
             }
         }
 
-        private function processStatementData(): void
+        private function processStatementData()
+        : void
         {
             $accountQuery = [
                 'account_number' => $this->account_number,
@@ -84,28 +85,32 @@
             }
         }
 
-        private function getTotalEntryCount(array $criteria): int
+        private function getTotalEntryCount(array $criteria)
+        : int
         {
             return StmtEntry::where('account_number', $criteria['account_number'])
                             ->where('booking_date', $criteria['period'])
                             ->count();
         }
 
-        private function getExistingProcessedCount(array $criteria): int
+        private function getExistingProcessedCount(array $criteria)
+        : int
         {
             return ProcessedStatement::where('account_number', $criteria['account_number'])
                                      ->where('period', $criteria['period'])
                                      ->count();
         }
 
-        private function deleteExistingProcessedData(array $criteria): void
+        private function deleteExistingProcessedData(array $criteria)
+        : void
         {
             ProcessedStatement::where('account_number', $criteria['account_number'])
                               ->where('period', $criteria['period'])
                               ->delete();
         }
 
-        private function processAndSaveStatementEntries(int $totalCount): void
+        private function processAndSaveStatementEntries(int $totalCount)
+        : void
         {
             $runningBalance = (float) $this->saldo;
             $globalSequence = 0;
@@ -126,7 +131,8 @@
                      });
         }
 
-        private function prepareProcessedData($entries, &$runningBalance, &$globalSequence): array
+        private function prepareProcessedData($entries, &$runningBalance, &$globalSequence)
+        : array
         {
             $processedData = [];
 
@@ -156,7 +162,8 @@
             return $processedData;
         }
 
-        private function formatTransactionDate($item): string
+        private function formatTransactionDate($item)
+        : string
         {
             try {
                 return Carbon::createFromFormat(
@@ -169,7 +176,8 @@
             }
         }
 
-        private function formatActualDate($item): string
+        private function formatActualDate($item)
+        : string
         {
             try {
                 return Carbon::createFromFormat(
@@ -284,21 +292,17 @@
             return str_replace('<NL>', '', $result);
         }
 
-        /**
-         * Get transaction data by reference and field
-         */
-        private function getTransaction($ref, $field)
-        {
-            $trans = TempFundsTransfer::where('ref_no', $ref)->first();
-            return $trans->$field ?? "";
-        }
-
         /**
          * Export processed data to CSV file
          */
         private function exportToCsv()
         : void
         {
+            // Delete existing file if it exists
+            if (Storage::disk($this->disk)->exists("statements/{$this->fileName}")) {
+                Storage::disk($this->disk)->delete("statements/{$this->fileName}");
+            }
+
             $csvContent = "NO|TRANSACTION.DATE|REFERENCE.NUMBER|TRANSACTION.AMOUNT|TRANSACTION.TYPE|DESCRIPTION|END.BALANCE|ACTUAL.DATE\n";
 
             // Ambil data yang sudah diproses dalam chunk untuk mengurangi penggunaan memori
@@ -326,4 +330,13 @@
 
             Log::info("Statement exported to {$this->disk} disk: statements/{$this->fileName}");
         }
+
+        /**
+         * Get transaction data by reference and field
+         */
+        private function getTransaction($ref, $field)
+        {
+            $trans = TempFundsTransfer::where('ref_no', $ref)->first();
+            return $trans->$field ?? "";
+        }
     }