From 88c4fe0147a620ff94ecc7e37de0775306262aba Mon Sep 17 00:00:00 2001
From: David Bomba <turbo124@gmail.com>
Date: Mon, 27 Sep 2021 08:24:11 +1000
Subject: [PATCH] Recurring expense send date calculations

---
 app/Models/RecurringExpense.php               | 73 +++++++++++++++++++
 .../RecurringExpenseTransformer.php           |  7 +-
 2 files changed, 79 insertions(+), 1 deletion(-)

diff --git a/app/Models/RecurringExpense.php b/app/Models/RecurringExpense.php
index 8682c0568fa4..986dd7eebb9b 100644
--- a/app/Models/RecurringExpense.php
+++ b/app/Models/RecurringExpense.php
@@ -164,4 +164,77 @@ class RecurringExpense extends BaseModel
         }
     }
 
+    public function recurringDates()
+    {
+
+        /* Return early if nothing to send back! */
+        if ($this->status_id == RecurringInvoice::STATUS_COMPLETED ||
+            $this->remaining_cycles == 0 ||
+            !$this->next_send_date) {
+            return [];
+        }
+
+        /* Endless - lets send 10 back*/
+        $iterations = $this->remaining_cycles;
+
+        if ($this->remaining_cycles == -1) {
+            $iterations = 10;
+        }
+
+        $data = [];
+
+        if (!Carbon::parse($this->next_send_date)) {
+            return $data;
+        }
+
+        $next_send_date = Carbon::parse($this->next_send_date)->copy();
+
+        for ($x=0; $x<$iterations; $x++) {
+            // we don't add the days... we calc the day of the month!!
+            $next_due_date = $this->nextDateByFrequency($next_send_date);
+
+            $data[] = [
+                'send_date' => $next_send_date->format('Y-m-d'),
+            ];
+
+        }
+
+        return $data;
+    }
+
+    public function nextDateByFrequency($date)
+    {
+        $offset = $this->client->timezone_offset();
+
+        switch ($this->frequency_id) {
+            case RecurringInvoice::FREQUENCY_DAILY:
+                return $date->startOfDay()->addDay()->addSeconds($offset);
+            case RecurringInvoice::FREQUENCY_WEEKLY:
+                return $date->startOfDay()->addWeek()->addSeconds($offset);
+            case RecurringInvoice::FREQUENCY_TWO_WEEKS:
+                return $date->startOfDay()->addWeeks(2)->addSeconds($offset);
+            case RecurringInvoice::FREQUENCY_FOUR_WEEKS:
+                return $date->startOfDay()->addWeeks(4)->addSeconds($offset);
+            case RecurringInvoice::FREQUENCY_MONTHLY:
+                return $date->startOfDay()->addMonthNoOverflow()->addSeconds($offset);
+            case RecurringInvoice::FREQUENCY_TWO_MONTHS:
+                return $date->startOfDay()->addMonthsNoOverflow(2)->addSeconds($offset);
+            case RecurringInvoice::FREQUENCY_THREE_MONTHS:
+                return $date->startOfDay()->addMonthsNoOverflow(3)->addSeconds($offset);
+            case RecurringInvoice::FREQUENCY_FOUR_MONTHS:
+                return $date->startOfDay()->addMonthsNoOverflow(4)->addSeconds($offset);
+            case RecurringInvoice::FREQUENCY_SIX_MONTHS:
+                return $date->addMonthsNoOverflow(6)->addSeconds($offset);
+            case RecurringInvoice::FREQUENCY_ANNUALLY:
+                return $date->startOfDay()->addYear()->addSeconds($offset);
+            case RecurringInvoice::FREQUENCY_TWO_YEARS:
+                return $date->startOfDay()->addYears(2)->addSeconds($offset);
+            case RecurringInvoice::FREQUENCY_THREE_YEARS:
+                return $date->startOfDay()->addYears(3)->addSeconds($offset);
+            default:
+                return null;
+        }
+    }
+
+
 }
diff --git a/app/Transformers/RecurringExpenseTransformer.php b/app/Transformers/RecurringExpenseTransformer.php
index 6457bb000792..6332e4535aa1 100644
--- a/app/Transformers/RecurringExpenseTransformer.php
+++ b/app/Transformers/RecurringExpenseTransformer.php
@@ -49,7 +49,7 @@ class RecurringExpenseTransformer extends EntityTransformer
      */
     public function transform(RecurringExpense $recurring_expense)
     {
-        return [
+        $data = [
             'id' => $this->encodePrimaryKey($recurring_expense->id),
             'user_id' => $this->encodePrimaryKey($recurring_expense->user_id),
             'assigned_user_id' => $this->encodePrimaryKey($recurring_expense->assigned_user_id),
@@ -102,5 +102,10 @@ class RecurringExpenseTransformer extends EntityTransformer
             'last_sent_date' => $recurring_expense->last_sent_date ?: '',
             'next_send_date' => $recurring_expense->next_send_date ?: '',
         ];
+
+        if(request()->has('show_dates') && request()->query('show_dates') == 'true')
+            $data['recurring_dates'] = (array) $recurring_expense->recurringDates();
+
+             return $data;
     }
 }
\ No newline at end of file