public function save($data, $checkSubPermissions = false)
 {
     $account = \Auth::user()->account;
     $publicId = isset($data['public_id']) ? $data['public_id'] : false;
     $isNew = !$publicId || $publicId == '-1';
     if ($isNew) {
         $entityType = ENTITY_INVOICE;
         if (isset($data['is_recurring']) && filter_var($data['is_recurring'], FILTER_VALIDATE_BOOLEAN)) {
             $entityType = ENTITY_RECURRING_INVOICE;
         } elseif (isset($data['is_quote']) && filter_var($data['is_quote'], FILTER_VALIDATE_BOOLEAN)) {
             $entityType = ENTITY_QUOTE;
         }
         $invoice = $account->createInvoice($entityType, $data['client_id']);
         if (isset($data['has_tasks']) && filter_var($data['has_tasks'], FILTER_VALIDATE_BOOLEAN)) {
             $invoice->has_tasks = true;
         }
         if (isset($data['has_expenses']) && filter_var($data['has_expenses'], FILTER_VALIDATE_BOOLEAN)) {
             $invoice->has_expenses = true;
         }
     } else {
         $invoice = Invoice::scope($publicId)->firstOrFail();
     }
     if (isset($data['set_default_terms']) && $data['set_default_terms'] || isset($data['set_default_footer']) && $data['set_default_footer']) {
         if (isset($data['set_default_terms']) && $data['set_default_terms']) {
             $account->{"{$invoice->getEntityType()}_terms"} = trim($data['terms']);
         }
         if (isset($data['set_default_footer']) && $data['set_default_footer']) {
             $account->invoice_footer = trim($data['invoice_footer']);
         }
         $account->save();
     }
     if (isset($data['invoice_number']) && !$invoice->is_recurring) {
         $invoice->invoice_number = trim($data['invoice_number']);
     }
     if (isset($data['discount'])) {
         $invoice->discount = round(Utils::parseFloat($data['discount']), 2);
     }
     if (isset($data['is_amount_discount'])) {
         $invoice->is_amount_discount = $data['is_amount_discount'] ? true : false;
     }
     if (isset($data['partial'])) {
         $invoice->partial = round(Utils::parseFloat($data['partial']), 2);
     }
     if (isset($data['invoice_date_sql'])) {
         $invoice->invoice_date = $data['invoice_date_sql'];
     } elseif (isset($data['invoice_date'])) {
         $invoice->invoice_date = Utils::toSqlDate($data['invoice_date']);
     }
     if (isset($data['invoice_status_id'])) {
         if ($data['invoice_status_id'] == 0) {
             $data['invoice_status_id'] = INVOICE_STATUS_DRAFT;
         }
         $invoice->invoice_status_id = $data['invoice_status_id'];
     }
     if ($invoice->is_recurring) {
         if ($invoice->start_date && $invoice->start_date != Utils::toSqlDate($data['start_date'])) {
             $invoice->last_sent_date = null;
         }
         $invoice->frequency_id = $data['frequency_id'] ? $data['frequency_id'] : 0;
         $invoice->start_date = Utils::toSqlDate($data['start_date']);
         $invoice->end_date = Utils::toSqlDate($data['end_date']);
         $invoice->auto_bill = isset($data['auto_bill']) && $data['auto_bill'] ? true : false;
         if (isset($data['recurring_due_date'])) {
             $invoice->due_date = $data['recurring_due_date'];
         } elseif (isset($data['due_date'])) {
             $invoice->due_date = $data['due_date'];
         }
     } else {
         if (isset($data['due_date']) || isset($data['due_date_sql'])) {
             $invoice->due_date = isset($data['due_date_sql']) ? $data['due_date_sql'] : Utils::toSqlDate($data['due_date']);
         }
         $invoice->frequency_id = 0;
         $invoice->start_date = null;
         $invoice->end_date = null;
     }
     $invoice->terms = isset($data['terms']) && trim($data['terms']) ? trim($data['terms']) : (!$publicId && $account->invoice_terms ? $account->invoice_terms : '');
     $invoice->invoice_footer = isset($data['invoice_footer']) && trim($data['invoice_footer']) ? trim($data['invoice_footer']) : (!$publicId && $account->invoice_footer ? $account->invoice_footer : '');
     $invoice->public_notes = isset($data['public_notes']) ? trim($data['public_notes']) : null;
     // process date variables
     $invoice->terms = Utils::processVariables($invoice->terms);
     $invoice->invoice_footer = Utils::processVariables($invoice->invoice_footer);
     $invoice->public_notes = Utils::processVariables($invoice->public_notes);
     if (isset($data['po_number'])) {
         $invoice->po_number = trim($data['po_number']);
     }
     $invoice->invoice_design_id = isset($data['invoice_design_id']) ? $data['invoice_design_id'] : $account->invoice_design_id;
     if (isset($data['tax_name']) && isset($data['tax_rate']) && $data['tax_name']) {
         $invoice->tax_rate = Utils::parseFloat($data['tax_rate']);
         $invoice->tax_name = trim($data['tax_name']);
     } else {
         $invoice->tax_rate = 0;
         $invoice->tax_name = '';
     }
     $total = 0;
     $itemTax = 0;
     foreach ($data['invoice_items'] as $item) {
         $item = (array) $item;
         if (!$item['cost'] && !$item['product_key'] && !$item['notes']) {
             continue;
         }
         $invoiceItemCost = round(Utils::parseFloat($item['cost']), 2);
         $invoiceItemQty = round(Utils::parseFloat($item['qty']), 2);
         $lineTotal = $invoiceItemCost * $invoiceItemQty;
         $total += round($lineTotal, 2);
     }
     foreach ($data['invoice_items'] as $item) {
         $item = (array) $item;
         if (isset($item['tax_rate']) && Utils::parseFloat($item['tax_rate']) > 0) {
             $invoiceItemCost = round(Utils::parseFloat($item['cost']), 2);
             $invoiceItemQty = round(Utils::parseFloat($item['qty']), 2);
             $invoiceItemTaxRate = Utils::parseFloat($item['tax_rate']);
             $lineTotal = $invoiceItemCost * $invoiceItemQty;
             if ($invoice->discount > 0) {
                 if ($invoice->is_amount_discount) {
                     $lineTotal -= round($lineTotal / $total * $invoice->discount, 2);
                 } else {
                     $lineTotal -= round($lineTotal * ($invoice->discount / 100), 2);
                 }
             }
             $itemTax += round($lineTotal * $invoiceItemTaxRate / 100, 2);
         }
     }
     if ($invoice->discount > 0) {
         if ($invoice->is_amount_discount) {
             $total -= $invoice->discount;
         } else {
             $total *= (100 - $invoice->discount) / 100;
             $total = round($total, 2);
         }
     }
     if (isset($data['custom_value1'])) {
         $invoice->custom_value1 = round($data['custom_value1'], 2);
         if ($isNew) {
             $invoice->custom_taxes1 = $account->custom_invoice_taxes1 ?: false;
         }
     }
     if (isset($data['custom_value2'])) {
         $invoice->custom_value2 = round($data['custom_value2'], 2);
         if ($isNew) {
             $invoice->custom_taxes2 = $account->custom_invoice_taxes2 ?: false;
         }
     }
     if (isset($data['custom_text_value1'])) {
         $invoice->custom_text_value1 = trim($data['custom_text_value1']);
     }
     if (isset($data['custom_text_value2'])) {
         $invoice->custom_text_value2 = trim($data['custom_text_value2']);
     }
     // custom fields charged taxes
     if ($invoice->custom_value1 && $invoice->custom_taxes1) {
         $total += $invoice->custom_value1;
     }
     if ($invoice->custom_value2 && $invoice->custom_taxes2) {
         $total += $invoice->custom_value2;
     }
     $total += $total * $invoice->tax_rate / 100;
     $total = round($total, 2);
     $total += $itemTax;
     // custom fields not charged taxes
     if ($invoice->custom_value1 && !$invoice->custom_taxes1) {
         $total += $invoice->custom_value1;
     }
     if ($invoice->custom_value2 && !$invoice->custom_taxes2) {
         $total += $invoice->custom_value2;
     }
     if ($publicId) {
         $invoice->balance = $total - ($invoice->amount - $invoice->balance);
     } else {
         $invoice->balance = $total;
     }
     $invoice->amount = $total;
     $invoice->save();
     if ($publicId) {
         $invoice->invoice_items()->forceDelete();
     }
     foreach ($data['invoice_items'] as $item) {
         $item = (array) $item;
         if (empty($item['cost']) && empty($item['product_key']) && empty($item['notes']) && empty($item['custom_value1']) && empty($item['custom_value2'])) {
             continue;
         }
         $task = false;
         if (isset($item['task_public_id']) && $item['task_public_id']) {
             $task = Task::scope($item['task_public_id'])->where('invoice_id', '=', null)->firstOrFail();
             if (!$checkSubPermissions || $task->canEdit()) {
                 $task->invoice_id = $invoice->id;
                 $task->client_id = $invoice->client_id;
                 $task->save();
             }
         }
         $expense = false;
         if (isset($item['expense_public_id']) && $item['expense_public_id']) {
             $expense = Expense::scope($item['expense_public_id'])->where('invoice_id', '=', null)->firstOrFail();
             if (!$checkSubPermissions || $expense->canEdit()) {
                 $expense->invoice_id = $invoice->id;
                 $expense->client_id = $invoice->client_id;
                 $expense->save();
             }
         }
         if ($productKey = trim($item['product_key'])) {
             if (\Auth::user()->account->update_products && !strtotime($productKey)) {
                 $product = Product::findProductByKey($productKey);
                 if (!$product) {
                     if (!$checkSubPermissions || Product::canCreate()) {
                         $product = Product::createNew();
                         $product->product_key = trim($item['product_key']);
                     } else {
                         $product = null;
                     }
                 }
                 if ($product && (!$checkSubPermissions || $product->canEdit())) {
                     $product->notes = $task || $expense ? '' : $item['notes'];
                     $product->cost = $expense ? 0 : $item['cost'];
                     $product->save();
                 }
             }
         }
         $invoiceItem = InvoiceItem::createNew();
         $invoiceItem->product_id = isset($product) ? $product->id : null;
         $invoiceItem->product_key = isset($item['product_key']) ? trim($invoice->is_recurring ? $item['product_key'] : Utils::processVariables($item['product_key'])) : '';
         $invoiceItem->notes = trim($invoice->is_recurring ? $item['notes'] : Utils::processVariables($item['notes']));
         $invoiceItem->cost = Utils::parseFloat($item['cost']);
         $invoiceItem->qty = Utils::parseFloat($item['qty']);
         $invoiceItem->tax_rate = 0;
         if (isset($item['custom_value1'])) {
             $invoiceItem->custom_value1 = $item['custom_value1'];
         }
         if (isset($item['custom_value2'])) {
             $invoiceItem->custom_value2 = $item['custom_value2'];
         }
         if (isset($item['tax_rate']) && isset($item['tax_name']) && $item['tax_name']) {
             $invoiceItem['tax_rate'] = Utils::parseFloat($item['tax_rate']);
             $invoiceItem['tax_name'] = trim($item['tax_name']);
         }
         $invoice->invoice_items()->save($invoiceItem);
     }
     return $invoice;
 }