Move airline transaction code into service layer (#371)

* Move airline transaction code into service layer

* Remove unused import

app/Http/Controllers/Admin/FinanceController.php

@@ -5,10 +5,9 @@ namespace App\Http\Controllers\Admin;
 use App\Contracts\Controller;
 use App\Models\Enums\JournalType;
 use App\Models\Journal;
-use App\Models\JournalTransaction;
 use App\Repositories\AirlineRepository;
+use App\Services\FinanceService;
 use App\Support\Dates;
-use App\Support\Money;
 use Illuminate\Http\Request;
 
 /**
@@ -17,14 +16,18 @@ use Illuminate\Http\Request;
 class FinanceController extends Controller
 {
     private $airlineRepo;
+    private $financeSvc;
 
     /**
      * @param AirlineRepository $airlineRepo
+     * @param FinanceService    $financeSvc
      */
     public function __construct(
-        AirlineRepository $airlineRepo
+        AirlineRepository $airlineRepo,
+        FinanceService $financeSvc
     ) {
         $this->airlineRepo = $airlineRepo;
+        $this->financeSvc = $financeSvc;
     }
 
     /**
@@ -52,34 +55,11 @@ class FinanceController extends Controller
 
         // group by the airline
         foreach ($airlines as $airline) {
-            // Return all the transactions, grouped by the transaction group
-            $transactions = JournalTransaction::groupBy('transaction_group', 'currency')
-                ->selectRaw('transaction_group, currency, 
-                             SUM(credit) as sum_credits, 
-                             SUM(debit) as sum_debits')
-                ->where([
-                    'journal_id' => $airline->journal->id,
-                ])
-                ->whereBetween('created_at', $between, 'AND')
-                ->orderBy('sum_credits', 'desc')
-                ->orderBy('sum_debits', 'desc')
-                ->orderBy('transaction_group', 'asc')
-                ->get();
-
-            // Summate it so we can show it on the footer of the table
-            $sum_all_credits = 0;
-            $sum_all_debits = 0;
-            foreach ($transactions as $ta) {
-                $sum_all_credits += $ta->sum_credits ?? 0;
-                $sum_all_debits += $ta->sum_debits ?? 0;
-            }
-
-            $transaction_groups[] = [
-                'airline'      => $airline,
-                'credits'      => new Money($sum_all_credits),
-                'debits'       => new Money($sum_all_debits),
-                'transactions' => $transactions,
-            ];
+            $transaction_groups[] = $this->financeSvc->getAirlineTransactionsBetween(
+                $airline,
+                $between[0],
+                $between[1]
+            );
         }
 
         return view('admin.finances.index', [

app/Services/FinanceService.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace App\Services;
+
+use App\Contracts\Service;
+use App\Models\Airline;
+use App\Models\JournalTransaction;
+use App\Support\Money;
+
+class FinanceService extends Service
+{
+    /**
+     * Get all of the transactions for an airline between two given dates. Returns an array
+     * with `credits`, `debits` and `transactions` fields, where transactions contains the
+     * grouped transactions (e.g, "Fares" and "Ground Handling", etc)
+     *
+     * @param Airline $airline
+     * @param string  $start_date YYYY-MM-DD
+     * @param string  $end_date   YYYY-MM-DD
+     *
+     * @return array
+     */
+    public function getAirlineTransactionsBetween($airline, $start_date, $end_date)
+    {
+        // Return all the transactions, grouped by the transaction group
+        $transactions = JournalTransaction::groupBy('transaction_group', 'currency')
+            ->selectRaw('transaction_group, 
+                         currency, 
+                         SUM(credit) as sum_credits, 
+                         SUM(debit) as sum_debits')
+            ->where(['journal_id' => $airline->journal->id])
+            ->whereBetween('created_at', [$start_date, $end_date], 'AND')
+            ->orderBy('sum_credits', 'desc')
+            ->orderBy('sum_debits', 'desc')
+            ->orderBy('transaction_group', 'asc')
+            ->get();
+
+        // Summate it so we can show it on the footer of the table
+        $sum_all_credits = 0;
+        $sum_all_debits = 0;
+        foreach ($transactions as $ta) {
+            $sum_all_credits += $ta->sum_credits ?? 0;
+            $sum_all_debits += $ta->sum_debits ?? 0;
+        }
+
+        return [
+            'airline'      => $airline,
+            'credits'      => new Money($sum_all_credits),
+            'debits'       => new Money($sum_all_debits),
+            'transactions' => $transactions,
+        ];
+    }
+}