Add discount per item for invoice

app/Http/Controllers/Sales/Invoices.php

@@ -77,6 +77,8 @@ class Invoices extends Controller
 
         $date_format = $this->getCompanyDateFormat();
 
+        $discount_location = $invoice->totals->contains($invoice->totals->where('code', 'discount')->first()) ? 'in_totals' : 'per_item';
+
         // Get Invoice Totals
         foreach ($invoice->totals as $invoice_total) {
             $invoice->{$invoice_total->code} = $invoice_total->amount;
@@ -90,7 +92,22 @@ class Invoices extends Controller
             $invoice->grand_total = round($invoice->total - $invoice->paid, $currency->precision);
         }
 
-        return view('sales.invoices.show', compact('invoice', 'accounts', 'currencies', 'currency', 'account_currency_code', 'customers', 'categories', 'payment_methods', 'signed_url', 'date_format'));
+        return view(
+            'sales.invoices.show',
+            compact(
+                'invoice',
+                'accounts',
+                'currencies',
+                'currency',
+                'account_currency_code',
+                'customers',
+                'categories',
+                'payment_methods',
+                'signed_url',
+                'date_format',
+                'discount_location'
+            )
+        );
     }
 
     /**

app/Http/Controllers/Settings/Defaults.php

@@ -27,12 +27,18 @@ class Defaults extends Controller
 
         $payment_methods = Modules::getPaymentMethods();
 
+        $discount_locations = [
+            'in_totals' => trans('settings.default.discount_in_totals'),
+            'per_item' => trans('settings.default.discount_per_item'),
+        ];
+
         return view('settings.default.edit', compact(
             'setting',
             'accounts',
             'currencies',
             'taxes',
-            'payment_methods'
+            'payment_methods',
+            'discount_locations'
         ));
     }
 }

app/Jobs/Sale/CreateInvoiceItem.php

@@ -40,7 +40,7 @@ class CreateInvoiceItem extends Job
 
         // Apply discount to amount
         if (!empty($this->request['discount'])) {
-            $item_discounted_amount = $item_amount - ($item_amount * ($this->request['discount'] / 100));
+            $item_discounted_amount = $item_amount -= ($item_amount * ($this->request['discount'] / 100));
         }
 
         $tax_amount = 0;
@@ -138,6 +138,7 @@ class CreateInvoiceItem extends Job
             'quantity' => (double) $this->request['quantity'],
             'price' => (double) $this->request['price'],
             'tax' => $item_tax_total,
+            'discount_rate' => $this->request['discount'],
             'total' => $item_amount,
         ]);
 

app/Models/Sale/InvoiceItem.php

@@ -17,7 +17,18 @@ class InvoiceItem extends Model
      *
      * @var array
      */
-    protected $fillable = ['company_id', 'invoice_id', 'item_id', 'name', 'quantity', 'price', 'total', 'tax'];
+    protected $fillable = [
+        'company_id',
+        'invoice_id',
+        'item_id',
+        'name',
+        'quantity',
+        'price',
+        'total',
+        'tax',
+        'discount_rate',
+        'discount_type',
+    ];
 
     /**
      * Clonable relationships.
@@ -83,6 +94,22 @@ class InvoiceItem extends Model
         $this->attributes['tax'] = (double) $value;
     }
 
+    /**
+     * Get the formatted discount.
+     *
+     * @return string
+     */
+    public function getDiscountRateAttribute($value)
+    {
+        if (setting('localisation.percent_position', 'after') === 'after') {
+            $text = ($this->discount_type === 'normal') ? $value . '%' : $value;
+        } else {
+            $text = ($this->discount_type === 'normal') ? '%' . $value : $value;
+        }
+
+        return $text;
+    }
+
     /**
      * Convert tax to Array.
      *

app/Models/Sale/InvoiceItemDiscount.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Models\Sale;
+
+use App\Abstracts\Model;
+use App\Traits\Currencies;
+use Znck\Eloquent\Traits\BelongsToThrough;
+
+class InvoiceItemDiscount extends Model
+{
+    use Currencies, BelongsToThrough;
+
+    protected $table = 'invoice_item_discounts';
+
+    /**
+     * Attributes that should be mass-assignable.
+     *
+     * @var array
+     */
+    protected $fillable = ['company_id', 'invoice_id', 'invoice_item_id', 'rate', 'type', 'name', 'amount'];
+
+    public function invoice()
+    {
+        return $this->belongsTo('App\Models\Sale\Invoice');
+    }
+
+    public function item()
+    {
+        return $this->belongsToThrough('App\Models\Common\Item', 'App\Models\Sale\InvoiceItem', 'invoice_item_id')->withDefault(['name' => trans('general.na')]);
+    }
+
+    /**
+     * Convert rate to double.
+     *
+     * @param  string  $value
+     * @return void
+     */
+    public function setRateAttribute($value)
+    {
+        $this->attributes['rate'] = (double) $value;
+    }
+}