Support relabeling po number and due date

app/Http/Controllers/AccountController.php

@@ -956,7 +956,22 @@ class AccountController extends BaseController
             $account->page_size = Input::get('page_size');
 
             $labels = [];
-            foreach (['item', 'description', 'unit_cost', 'quantity', 'line_total', 'terms', 'balance_due', 'partial_due', 'subtotal', 'paid_to_date', 'discount', 'tax'] as $field) {
+            foreach ([
+                'item',
+                'description',
+                'unit_cost',
+                'quantity',
+                'line_total',
+                'terms',
+                'balance_due',
+                'partial_due',
+                'subtotal',
+                'paid_to_date',
+                'discount',
+                'tax',
+                'po_number',
+                'due_date',
+            ] as $field) {
                 $labels[$field] = Input::get("labels_{$field}");
             }
             $account->invoice_labels = json_encode($labels);

app/Models/Invoice.php

@@ -1504,6 +1504,11 @@ class Invoice extends EntityModel implements BalanceAffecting
                 ->orderBy('id', 'desc')
                 ->get();
     }
+
+    public function getDueDateLabel()
+    {
+        return $this->isQuote() ? 'valid_until' : 'due_date';
+    }
 }
 
 Invoice::creating(function ($invoice) {

app/Models/Traits/PresentsInvoice.php

@@ -162,6 +162,28 @@ trait PresentsInvoice
         return $fields;
     }
 
+    public function hasCustomLabel($field)
+    {
+        $custom = (array) json_decode($this->invoice_labels);
+
+        return isset($custom[$field]) && $custom[$field];
+    }
+
+    public function getLabel($field, $override = false)
+    {
+        $custom = (array) json_decode($this->invoice_labels);
+
+        if (isset($custom[$field]) && $custom[$field]) {
+            return $custom[$field];
+        } else {
+            if ($override) {
+                $field = $override;
+            }
+            return $this->isEnglish() ? uctrans("texts.$field") : trans("texts.$field");
+        }
+
+    }
+
     /**
      * @return array
      */
@@ -239,6 +261,8 @@ trait PresentsInvoice
             'work_phone',
             'invoice_total',
             'outstanding',
+            'invoice_due_date',
+            'quote_due_date',
         ];
 
         foreach ($fields as $field) {

resources/views/accounts/invoice_design.blade.php

@@ -215,14 +215,16 @@
 							{!! Former::text('labels_quantity')->label('quantity') !!}
 							{!! Former::text('labels_line_total')->label('line_total') !!}
 							{!! Former::text('labels_terms')->label('terms') !!}
+							{!! Former::text('labels_subtotal')->label('subtotal') !!}
 						</div>
 						<div class="col-md-6">
-							{!! Former::text('labels_subtotal')->label('subtotal') !!}
 							{!! Former::text('labels_discount')->label('discount') !!}
 							{!! Former::text('labels_paid_to_date')->label('paid_to_date') !!}
 							{!! Former::text('labels_balance_due')->label('balance_due') !!}
 							{!! Former::text('labels_partial_due')->label('partial_due') !!}
 							{!! Former::text('labels_tax')->label('tax') !!}
+							{!! Former::text('labels_po_number')->label('po_number') !!}
+							{!! Former::text('labels_due_date')->label('due_date') !!}
                         </div>
                       </div>
 

resources/views/emails/design2_html.blade.php

@@ -25,7 +25,11 @@
                                     @if ($invoice->isQuote())
                                         {{ strtoupper(trans('texts.valid_until')) }} {{ $account->formatDate($invoice->due_date) }}
                                     @else
-                                        {{ strtoupper(trans('texts.due_by', ['date' => $account->formatDate($invoice->due_date)])) }}
+                                        @if ($account->hasCustomLabel('due_date'))
+                                            {{ $account->getLabel('due_date') }} {{ $account->formatDate($invoice->due_date) }}
+                                        @else
+                                            {{ strtoupper(trans('texts.due_by', ['date' => $account->formatDate($invoice->due_date)])) }}
+                                        @endif
                                     @endif
                                 </span><br />
                             @endif

resources/views/emails/design3_html.blade.php

@@ -25,7 +25,11 @@
                                     @if ($invoice->isQuote())
                                         {{ strtoupper(trans('texts.valid_until')) }} {{ $account->formatDate($invoice->due_date) }}
                                     @else
-                                        {{ strtoupper(trans('texts.due_by', ['date' => $account->formatDate($invoice->due_date)])) }}
+                                        @if ($account->hasCustomLabel('due_date'))
+                                            {{ $account->getLabel('due_date') }} {{ $account->formatDate($invoice->due_date) }}
+                                        @else
+                                            {{ strtoupper(trans('texts.due_by', ['date' => $account->formatDate($invoice->due_date)])) }}
+                                        @endif
                                     @endif
                                 </span><br />
                             @endif

resources/views/invoices/edit.blade.php

@@ -153,7 +153,7 @@
 			<div data-bind="visible: !is_recurring()">
 				{!! Former::text('invoice_date')->data_bind("datePicker: invoice_date, valueUpdate: 'afterkeydown'")->label(trans("texts.{$entityType}_date"))
 							->data_date_format(Session::get(SESSION_DATE_PICKER_FORMAT, DEFAULT_DATE_PICKER_FORMAT))->appendIcon('calendar')->addGroupClass('invoice_date') !!}
-				{!! Former::text('due_date')->data_bind("datePicker: due_date, valueUpdate: 'afterkeydown'")->label(trans("texts.{$entityType}_due_date"))
+				{!! Former::text('due_date')->data_bind("datePicker: due_date, valueUpdate: 'afterkeydown'")->label($account->getLabel($invoice->getDueDateLabel()))
 							->placeholder($invoice->exists || $invoice->isQuote() ? ' ' : $account->present()->dueDatePlaceholder())
 							->data_date_format(Session::get(SESSION_DATE_PICKER_FORMAT, DEFAULT_DATE_PICKER_FORMAT))->appendIcon('calendar')->addGroupClass('due_date') !!}
 				{!! Former::text('partial')->data_bind("value: partial, valueUpdate: 'afterkeydown'")->onkeyup('onPartialChange()')
@@ -209,7 +209,7 @@
                     </div>
                 </div>
             </span>
-			{!! Former::text('po_number')->label(trans('texts.po_number_short'))->data_bind("value: po_number, valueUpdate: 'afterkeydown'") !!}
+			{!! Former::text('po_number')->label($account->getLabel('po_number', 'po_number_short'))->data_bind("value: po_number, valueUpdate: 'afterkeydown'") !!}
 			{!! Former::text('discount')->data_bind("value: discount, valueUpdate: 'afterkeydown'")
 					->addGroupClass('discount-group')->type('number')->min('0')->step('any')->append(
 						Former::select('is_amount_discount')->addOption(trans('texts.discount_percent'), '0')