diff --git a/app/Controllers/Attributes.php b/app/Controllers/Attributes.php
index c885e4b90..7268c06d3 100644
--- a/app/Controllers/Attributes.php
+++ b/app/Controllers/Attributes.php
@@ -53,7 +53,7 @@ class Attributes extends Secure_Controller
             $data_rows[] = get_attribute_definition_data_row($attribute_row);
         }
 
-        echo json_encode(['total' => $total_rows, 'rows' => $data_rows]);
+        $this->response->setJSON(['total' => $total_rows, 'rows' => $data_rows]);
     }
 
     /**
@@ -70,7 +70,7 @@ class Attributes extends Secure_Controller
             $this->request->getPost('attribute_id', FILTER_SANITIZE_NUMBER_INT) ?? false
         );
 
-        echo json_encode(['success' => $success != 0]);
+        $this->response->setJSON(['success' => $success != 0]);
     }
 
     /**
@@ -85,7 +85,7 @@ class Attributes extends Secure_Controller
             $this->request->getPost('definition_id', FILTER_SANITIZE_NUMBER_INT)
         );
 
-        echo json_encode(['success' => $success]);
+        $this->response->setJSON(['success' => $success]);
     }
 
     /**
@@ -128,20 +128,20 @@ class Attributes extends Secure_Controller
                     $this->attribute->saveAttributeValue($definition_value, $definition_data['definition_id']);
                 }
 
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => true,
                     'message' => lang('Attributes.definition_successful_adding') . ' ' . $definition_name,
                     'id'      => $definition_data['definition_id']
                 ]);
             } else { // Existing definition
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => true,
                     'message' => lang('Attributes.definition_successful_updating') . ' ' . $definition_name,
                     'id'      => $definition_id
                 ]);
             }
         } else { // Failure
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => false,
                 'message' => lang('Attributes.definition_error_adding_updating', [$definition_name]),
                 'id'      => NEW_ENTRY
diff --git a/app/Controllers/Cashups.php b/app/Controllers/Cashups.php
index e5c8b8799..44ab29aac 100644
--- a/app/Controllers/Cashups.php
+++ b/app/Controllers/Cashups.php
@@ -64,7 +64,7 @@ class Cashups extends Secure_Controller
             $data_rows[] = get_cash_up_data_row($cash_up);
         }
 
-        echo json_encode(['total' => $total_rows, 'rows' => $data_rows]);
+        $this->response->setJSON(['total' => $total_rows, 'rows' => $data_rows]);
     }
 
     /**
@@ -192,7 +192,7 @@ class Cashups extends Secure_Controller
         $cash_ups_info = $this->cashup->get_info($row_id);
         $data_row = get_cash_up_data_row($cash_ups_info);
 
-        echo json_encode($data_row);
+        $this->response->setJSON($data_row);
     }
 
     /**
@@ -227,12 +227,12 @@ class Cashups extends Secure_Controller
         if ($this->cashup->save_value($cash_up_data, $cashup_id)) {
             // New cashup_id
             if ($cashup_id == NEW_ENTRY) {
-                echo json_encode(['success' => true, 'message' => lang('Cashups.successful_adding'), 'id' => $cash_up_data['cashup_id']]);
+                $this->response->setJSON(['success' => true, 'message' => lang('Cashups.successful_adding'), 'id' => $cash_up_data['cashup_id']]);
             } else { // Existing Cashup
-                echo json_encode(['success' => true, 'message' => lang('Cashups.successful_updating'), 'id' => $cashup_id]);
+                $this->response->setJSON(['success' => true, 'message' => lang('Cashups.successful_updating'), 'id' => $cashup_id]);
             }
         } else { // Failure
-            echo json_encode(['success' => false, 'message' => lang('Cashups.error_adding_updating'), 'id' => NEW_ENTRY]);
+            $this->response->setJSON(['success' => false, 'message' => lang('Cashups.error_adding_updating'), 'id' => NEW_ENTRY]);
         }
     }
 
diff --git a/app/Controllers/Config.php b/app/Controllers/Config.php
index 9f1da31f3..0888bbba4 100644
--- a/app/Controllers/Config.php
+++ b/app/Controllers/Config.php
@@ -306,7 +306,7 @@ class Config extends Secure_Controller
         $message = lang('Config.saved_' . ($success ? '' : 'un') . 'successfully');
         $message = $upload_success ? $message : strip_tags($upload_data['error']);
 
-        echo json_encode(['success' => $success, 'message' => $message]);
+        $this->response->setJSON(['success' => $success, 'message' => $message]);
     }
 
 
diff --git a/app/Controllers/Customers.php b/app/Controllers/Customers.php
index d81dc05b6..0a434b9b2 100644
--- a/app/Controllers/Customers.php
+++ b/app/Controllers/Customers.php
@@ -72,7 +72,7 @@ class Customers extends Persons
 
         $data_row = get_customer_data_row($person, $stats);
 
-        echo json_encode($data_row);
+        $this->response->setJSON($data_row);
     }
 
 
diff --git a/app/Controllers/Employees.php b/app/Controllers/Employees.php
index e9fc68bba..2014ceb62 100644
--- a/app/Controllers/Employees.php
+++ b/app/Controllers/Employees.php
@@ -41,7 +41,7 @@ class Employees extends Persons
             $data_rows[] = get_person_data_row($person);
         }
 
-        echo json_encode(['total' => $total_rows, 'rows' => $data_rows]);
+        $this->response->setJSON(['total' => $total_rows, 'rows' => $data_rows]);
     }
 
     /**
@@ -54,7 +54,7 @@ class Employees extends Persons
         $search = $this->request->getGet('term');
         $suggestions = $this->employee->get_search_suggestions($search, 25, true);
 
-        echo json_encode($suggestions);
+        $this->response->setJSON($suggestions);
     }
 
     /**
@@ -65,7 +65,7 @@ class Employees extends Persons
         $search = $this->request->getPost('term');
         $suggestions = $this->employee->get_search_suggestions($search);
 
-        echo json_encode($suggestions);
+        $this->response->setJSON($suggestions);
     }
 
     /**
@@ -163,20 +163,20 @@ class Employees extends Persons
         if ($this->employee->save_employee($person_data, $employee_data, $grants_array, $employee_id)) {
             // New employee
             if ($employee_id == NEW_ENTRY) {
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => true,
                     'message' => lang('Employees.successful_adding') . ' ' . $first_name . ' ' . $last_name,
                     'id'      => $employee_data['person_id']
                 ]);
             } else { // Existing employee
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => true,
                     'message' => lang('Employees.successful_updating') . ' ' . $first_name . ' ' . $last_name,
                     'id'      => $employee_id
                 ]);
             }
         } else { // Failure
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => false,
                 'message' => lang('Employees.error_adding_updating') . ' ' . $first_name . ' ' . $last_name,
                 'id'      => NEW_ENTRY
@@ -192,12 +192,12 @@ class Employees extends Persons
         $employees_to_delete = $this->request->getPost('ids', FILTER_SANITIZE_FULL_SPECIAL_CHARS);
 
         if ($this->employee->delete_list($employees_to_delete)) {    // TODO: this is passing a string, but delete_list expects an array
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => true,
                 'message' => lang('Employees.successful_deleted') . ' ' . count($employees_to_delete) . ' ' . lang('Employees.one_or_multiple')
             ]);
         } else {
-            echo json_encode(['success' => false, 'message' => lang('Employees.cannot_be_deleted')]);
+            $this->response->setJSON(['success' => false, 'message' => lang('Employees.cannot_be_deleted')]);
         }
     }
 
diff --git a/app/Controllers/Expenses.php b/app/Controllers/Expenses.php
index bb5363d6c..7cda58971 100644
--- a/app/Controllers/Expenses.php
+++ b/app/Controllers/Expenses.php
@@ -78,7 +78,7 @@ class Expenses extends Secure_Controller
             $data_rows[] = get_expenses_data_last_row($expenses);
         }
 
-        echo json_encode(['total' => $total_rows, 'rows' => $data_rows, 'payment_summary' => $payment_summary]);
+        $this->response->setJSON(['total' => $total_rows, 'rows' => $data_rows, 'payment_summary' => $payment_summary]);
     }
 
     /**
@@ -137,7 +137,7 @@ class Expenses extends Secure_Controller
         $expense_info = $this->expense->get_info($row_id);
         $data_row = get_expenses_data_row($expense_info);
 
-        echo json_encode($data_row);
+        $this->response->setJSON($data_row);
     }
 
     /**
@@ -167,12 +167,12 @@ class Expenses extends Secure_Controller
         if ($this->expense->save_value($expense_data, $expense_id)) {
             // New Expense
             if ($expense_id == NEW_ENTRY) {
-                echo json_encode(['success' => true, 'message' => lang('Expenses.successful_adding'), 'id' => $expense_data['expense_id']]);
+                $this->response->setJSON(['success' => true, 'message' => lang('Expenses.successful_adding'), 'id' => $expense_data['expense_id']]);
             } else { // Existing Expense
-                echo json_encode(['success' => true, 'message' => lang('Expenses.successful_updating'), 'id' => $expense_id]);
+                $this->response->setJSON(['success' => true, 'message' => lang('Expenses.successful_updating'), 'id' => $expense_id]);
             }
         } else { // Failure
-            echo json_encode(['success' => false, 'message' => lang('Expenses.error_adding_updating'), 'id' => NEW_ENTRY]);
+            $this->response->setJSON(['success' => false, 'message' => lang('Expenses.error_adding_updating'), 'id' => NEW_ENTRY]);
         }
     }
 
@@ -184,7 +184,7 @@ class Expenses extends Secure_Controller
         $expenses_to_delete = $this->request->getPost('ids', FILTER_SANITIZE_FULL_SPECIAL_CHARS);
 
         if ($this->expense->delete_list($expenses_to_delete)) {
-            echo json_encode(['success' => true, 'message' => lang('Expenses.successful_deleted') . ' ' . count($expenses_to_delete) . ' ' . lang('Expenses.one_or_multiple'), 'ids' => $expenses_to_delete]);
+            $this->response->setJSON(['success' => true, 'message' => lang('Expenses.successful_deleted') . ' ' . count($expenses_to_delete) . ' ' . lang('Expenses.one_or_multiple'), 'ids' => $expenses_to_delete]);
         } else {
             echo json_encode(['success' => false, 'message' => lang('Expenses.cannot_be_deleted'), 'ids' => $expenses_to_delete]);
         }
diff --git a/app/Controllers/Expenses_categories.php b/app/Controllers/Expenses_categories.php
index 30eb42e0b..66c25a063 100644
--- a/app/Controllers/Expenses_categories.php
+++ b/app/Controllers/Expenses_categories.php
@@ -45,7 +45,7 @@ class Expenses_categories extends Secure_Controller    // TODO: Is this class ev
             $data_rows[] = get_expense_category_data_row($expense_category);
         }
 
-        echo json_encode(['total' => $total_rows, 'rows' => $data_rows]);
+        $this->response->setJSON(['total' => $total_rows, 'rows' => $data_rows]);
     }
 
     /**
@@ -56,7 +56,7 @@ class Expenses_categories extends Secure_Controller    // TODO: Is this class ev
     {
         $data_row = get_expense_category_data_row($this->expense_category->get_info($row_id));
 
-        echo json_encode($data_row);
+        $this->response->setJSON($data_row);
     }
 
     /**
@@ -84,20 +84,20 @@ class Expenses_categories extends Secure_Controller    // TODO: Is this class ev
         if ($this->expense_category->save_value($expense_category_data, $expense_category_id)) {
             // New expense_category
             if ($expense_category_id == NEW_ENTRY) {
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => true,
                     'message' => lang('Expenses_categories.successful_adding'),
                     'id'      => $expense_category_data['expense_category_id']
                 ]);
             } else { // Existing Expense Category
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => true,
                     'message' => lang('Expenses_categories.successful_updating'),
                     'id'      => $expense_category_id
                 ]);
             }
         } else { // Failure
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => true,
                 'message' => lang('Expenses_categories.error_adding_updating') . ' ' . $expense_category_data['category_name'],
                 'id'      => NEW_ENTRY
@@ -113,12 +113,12 @@ class Expenses_categories extends Secure_Controller    // TODO: Is this class ev
         $expense_category_to_delete = $this->request->getPost('ids', FILTER_SANITIZE_FULL_SPECIAL_CHARS);
 
         if ($this->expense_category->delete_list($expense_category_to_delete)) {    // TODO: Convert to ternary notation.
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => true,
                 'message' => lang('Expenses_categories.successful_deleted') . ' ' . count($expense_category_to_delete) . ' ' . lang('Expenses_categories.one_or_multiple')
             ]);
         } else {
-            echo json_encode(['success' => false, 'message' => lang('Expenses_categories.cannot_be_deleted')]);
+            $this->response->setJSON(['success' => false, 'message' => lang('Expenses_categories.cannot_be_deleted')]);
         }
     }
 }
diff --git a/app/Controllers/Giftcards.php b/app/Controllers/Giftcards.php
index f0bc683fa..fc0aadf74 100644
--- a/app/Controllers/Giftcards.php
+++ b/app/Controllers/Giftcards.php
@@ -46,7 +46,7 @@ class Giftcards extends Secure_Controller
             $data_rows[] = get_giftcard_data_row($giftcard);
         }
 
-        echo json_encode(['total' => $total_rows, 'rows' => $data_rows]);
+        $this->response->setJSON(['total' => $total_rows, 'rows' => $data_rows]);
     }
 
     /**
@@ -60,7 +60,7 @@ class Giftcards extends Secure_Controller
         $search = $this->request->getGet('term');
         $suggestions = $this->giftcard->get_search_suggestions($search, true);
 
-        echo json_encode($suggestions);
+        $this->response->setJSON($suggestions);
     }
 
     /**
@@ -71,7 +71,7 @@ class Giftcards extends Secure_Controller
         $search = $this->request->getPost('term');
         $suggestions = $this->giftcard->get_search_suggestions($search);
 
-        echo json_encode($suggestions);
+        $this->response->setJSON($suggestions);
     }
 
     /**
@@ -82,7 +82,7 @@ class Giftcards extends Secure_Controller
     {
         $data_row = get_giftcard_data_row($this->giftcard->get_info($row_id));
 
-        echo json_encode($data_row);
+        $this->response->setJSON($data_row);
     }
 
     /**
@@ -131,20 +131,20 @@ class Giftcards extends Secure_Controller
         if ($this->giftcard->save_value($giftcard_data, $giftcard_id)) {
             // New giftcard
             if ($giftcard_id == NEW_ENTRY) {    // TODO: Constant needed
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => true,
                     'message' => lang('Giftcards.successful_adding') . ' ' . $giftcard_data['giftcard_number'],
                     'id'      => $giftcard_data['giftcard_id']
                 ]);
             } else { // Existing giftcard
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => true,
                     'message' => lang('Giftcards.successful_updating') . ' ' . $giftcard_data['giftcard_number'],
                     'id'      => $giftcard_id
                 ]);
             }
         } else { // Failure
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => false,
                 'message' => lang('Giftcards.error_adding_updating') . ' ' . $giftcard_data['giftcard_number'],
                 'id'      => NEW_ENTRY
@@ -176,12 +176,12 @@ class Giftcards extends Secure_Controller
         $giftcards_to_delete = $this->request->getPost('ids', FILTER_SANITIZE_FULL_SPECIAL_CHARS);
 
         if ($this->giftcard->delete_list($giftcards_to_delete)) {
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => true,
                 'message' => lang('Giftcards.successful_deleted') . ' ' . count($giftcards_to_delete) . ' ' . lang('Giftcards.one_or_multiple')
             ]);
         } else {
-            echo json_encode(['success' => false, 'message' => lang('Giftcards.cannot_be_deleted')]);
+            $this->response->setJSON(['success' => false, 'message' => lang('Giftcards.cannot_be_deleted')]);
         }
     }
 }
diff --git a/app/Controllers/Home.php b/app/Controllers/Home.php
index 698d7961f..3a335cfa4 100644
--- a/app/Controllers/Home.php
+++ b/app/Controllers/Home.php
@@ -62,27 +62,27 @@ class Home extends Secure_Controller
                 ];
 
                 if ($this->employee->change_password($employee_data, $employee_id) && strlen($employee_data['password']) >= 8) {
-                    echo json_encode([
+                    $this->response->setJSON([
                         'success' => true,
                         'message' => lang('Employees.successful_change_password'),
                         'id'      => $employee_id
                     ]);
                 } else { // Failure    // TODO: Replace -1 with constant
-                    echo json_encode([
+                    $this->response->setJSON([
                         'success' => false,
                         'message' => lang('Employees.unsuccessful_change_password'),
                         'id'      => -1
                     ]);
                 }
             } else {    // TODO: Replace -1 with constant
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => false,
                     'message' => lang('Employees.current_password_invalid'),
                     'id'      => -1
                 ]);
             }
         } else {    // TODO: Replace -1 with constant
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => false,
                 'message' => lang('Employees.current_password_invalid'),
                 'id'      => -1
diff --git a/app/Controllers/Item_kits.php b/app/Controllers/Item_kits.php
index d5b0f8774..b7dc2907f 100644
--- a/app/Controllers/Item_kits.php
+++ b/app/Controllers/Item_kits.php
@@ -89,7 +89,7 @@ class Item_kits extends Secure_Controller
             $data_rows[] = get_item_kit_data_row($item_kit);
         }
 
-        echo json_encode(['total' => $total_rows, 'rows' => $data_rows]);
+        $this->response->setJSON(['total' => $total_rows, 'rows' => $data_rows]);
     }
 
     /**
@@ -100,7 +100,7 @@ class Item_kits extends Secure_Controller
         $search = $this->request->getPost('term');
         $suggestions = $this->item_kit->get_search_suggestions($search);
 
-        echo json_encode($suggestions);
+        $this->response->setJSON($suggestions);
     }
 
     /**
@@ -112,7 +112,7 @@ class Item_kits extends Secure_Controller
         // Calculate the total cost and retail price of the Kit, so it can be added to the table refresh
         $item_kit = $this->_add_totals_to_item_kit($this->item_kit->get_info($row_id));
 
-        echo json_encode(get_item_kit_data_row($item_kit));
+        $this->response->setJSON(get_item_kit_data_row($item_kit));
     }
 
     /**
@@ -201,20 +201,20 @@ class Item_kits extends Secure_Controller
             }
 
             if ($new_item) {
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => $success,
                     'message' => lang('Item_kits.successful_adding') . ' ' . $item_kit_data['name'],
                     'id'      => $item_kit_id
                 ]);
             } else {
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => $success,
                     'message' => lang('Item_kits.successful_updating') . ' ' . $item_kit_data['name'],
                     'id'      => $item_kit_id
                 ]);
             }
         } else { // Failure
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => false,
                 'message' => lang('Item_kits.error_adding_updating') . ' ' . $item_kit_data['name'],
                 'id'      => NEW_ENTRY
@@ -230,12 +230,12 @@ class Item_kits extends Secure_Controller
         $item_kits_to_delete = $this->request->getPost('ids', FILTER_SANITIZE_FULL_SPECIAL_CHARS);
 
         if ($this->item_kit->delete_list($item_kits_to_delete)) {
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => true,
                 'message' => lang('Item_kits.successful_deleted') . ' ' . count($item_kits_to_delete) . ' ' . lang('Item_kits.one_or_multiple')
             ]);
         } else {
-            echo json_encode(['success' => false, 'message' => lang('Item_kits.cannot_be_deleted')]);
+            $this->response->setJSON(['success' => false, 'message' => lang('Item_kits.cannot_be_deleted')]);
         }
     }
 
diff --git a/app/Controllers/Items.php b/app/Controllers/Items.php
index 154174024..a1d5922f6 100644
--- a/app/Controllers/Items.php
+++ b/app/Controllers/Items.php
@@ -134,7 +134,7 @@ class Items extends Secure_Controller
             }
         }
 
-        echo json_encode(['total' => $total_rows, 'rows' => $data_rows]);
+        $this->response->setJSON(['total' => $total_rows, 'rows' => $data_rows]);
     }
 
     /**
diff --git a/app/Controllers/Messages.php b/app/Controllers/Messages.php
index eb1b18a89..0266c7e41 100644
--- a/app/Controllers/Messages.php
+++ b/app/Controllers/Messages.php
@@ -53,9 +53,9 @@ class Messages extends Secure_Controller
         $response = $this->sms_lib->sendSMS($phone, $message);
 
         if ($response) {
-            echo json_encode(['success' => true, 'message' => lang('Messages.successfully_sent') . ' ' . esc($phone)]);
+            $this->response->setJSON(['success' => true, 'message' => lang('Messages.successfully_sent') . ' ' . esc($phone)]);
         } else {
-            echo json_encode(['success' => false, 'message' => lang('Messages.unsuccessfully_sent') . ' ' . esc($phone)]);
+            $this->response->setJSON(['success' => false, 'message' => lang('Messages.unsuccessfully_sent') . ' ' . esc($phone)]);
         }
     }
 
@@ -74,13 +74,13 @@ class Messages extends Secure_Controller
         $response = $this->sms_lib->sendSMS($phone, $message);
 
         if ($response) {
-            echo json_encode([
+            $this->response->setJSON([
                 'success'   => true,
                 'message'   => lang('Messages.successfully_sent') . ' ' . esc($phone),
                 'person_id' => $person_id
             ]);
         } else {
-            echo json_encode([
+            $this->response->setJSON([
                 'success'   => false,
                 'message'   => lang('Messages.unsuccessfully_sent') . ' ' . esc($phone),
                 'person_id' => NEW_ENTRY
diff --git a/app/Controllers/Persons.php b/app/Controllers/Persons.php
index d007657b6..c3fc41194 100644
--- a/app/Controllers/Persons.php
+++ b/app/Controllers/Persons.php
@@ -38,7 +38,7 @@ abstract class Persons extends Secure_Controller
         $search = $this->request->getGet('term');
         $suggestions = $this->person->get_search_suggestions($search);
 
-        echo json_encode($suggestions);
+        $this->response->setJSON($suggestions);
     }
 
     /**
@@ -48,7 +48,7 @@ abstract class Persons extends Secure_Controller
     {
         $data_row = get_person_data_row($this->person->get_info($row_id));
 
-        echo json_encode($data_row);
+        $this->response->setJSON($data_row);
     }
 
     /**
diff --git a/app/Controllers/Receivings.php b/app/Controllers/Receivings.php
index 91503ee00..05ec6e24d 100644
--- a/app/Controllers/Receivings.php
+++ b/app/Controllers/Receivings.php
@@ -65,7 +65,7 @@ class Receivings extends Secure_Controller
         $suggestions = $this->item->get_search_suggestions($search, ['search_custom' => false, 'is_deleted' => false], true);
         $suggestions = array_merge($suggestions, $this->item_kit->get_search_suggestions($search));
 
-        echo json_encode($suggestions);
+        $this->response->setJSON($suggestions);
     }
 
     /**
@@ -80,7 +80,7 @@ class Receivings extends Secure_Controller
         $suggestions = $this->item->get_stock_search_suggestions($search, ['search_custom' => false, 'is_deleted' => false], true);
         $suggestions = array_merge($suggestions, $this->item_kit->get_search_suggestions($search));
 
-        echo json_encode($suggestions);
+        $this->response->setJSON($suggestions);
     }
 
     /**
@@ -277,13 +277,13 @@ class Receivings extends Secure_Controller
         $receiving_ids = $receiving_id == -1 ? $this->request->getPost('ids', FILTER_SANITIZE_NUMBER_INT) : [$receiving_id];    // TODO: Replace -1 with constant
 
         if ($this->receiving->delete_list($receiving_ids, $employee_id, $update_inventory)) {    // TODO: Likely need to surround this block of code in a try-catch to catch the ReflectionException
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => true,
                 'message' => lang('Receivings.successfully_deleted') . ' ' . count($receiving_ids) . ' ' . lang('Receivings.one_or_multiple'),
                 'ids'     => $receiving_ids
             ]);
         } else {
-            echo json_encode(['success' => false, 'message' => lang('Receivings.cannot_be_deleted')]);
+            $this->response->setJSON(['success' => false, 'message' => lang('Receivings.cannot_be_deleted')]);
         }
     }
 
@@ -493,13 +493,13 @@ class Receivings extends Secure_Controller
 
         $this->inventory->update('RECV ' . $receiving_id, ['trans_date' => $receiving_time]);
         if ($this->receiving->update($receiving_id, $receiving_data)) {
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => true,
                 'message' => lang('Receivings.successfully_updated'),
                 'id'      => $receiving_id
             ]);
         } else {
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => false,
                 'message' => lang('Receivings.unsuccessfully_updated'),
                 'id'      => $receiving_id
diff --git a/app/Controllers/Reports.php b/app/Controllers/Reports.php
index dd01da1c0..b7fbd0090 100644
--- a/app/Controllers/Reports.php
+++ b/app/Controllers/Reports.php
@@ -1658,7 +1658,7 @@ class Reports extends Secure_Controller
             )
         ];
 
-        echo json_encode([$sale_id => $summary_data]);
+        $this->response->setJSON([$sale_id => $summary_data]);
     }
 
     /**
diff --git a/app/Controllers/Sales.php b/app/Controllers/Sales.php
index 7668d9f53..c1ef135fa 100644
--- a/app/Controllers/Sales.php
+++ b/app/Controllers/Sales.php
@@ -120,7 +120,7 @@ class Sales extends Secure_Controller
         $sale_info = $this->sale->get_info($row_id)->getRow();
         $data_row = get_sale_data_row($sale_info);
 
-        echo json_encode($data_row);
+        $this->response->setJSON($data_row);
     }
 
     /**
diff --git a/app/Controllers/Suppliers.php b/app/Controllers/Suppliers.php
index b52bde2ad..048664b72 100644
--- a/app/Controllers/Suppliers.php
+++ b/app/Controllers/Suppliers.php
@@ -36,7 +36,7 @@ class Suppliers extends Persons
         $data_row = get_supplier_data_row($this->supplier->get_info($row_id));
         $data_row['category'] = $this->supplier->get_category_name($data_row['category']);
 
-        echo json_encode($data_row);
+        $this->response->setJSON($data_row);
     }
 
     /**
diff --git a/app/Controllers/Tax_categories.php b/app/Controllers/Tax_categories.php
index 0d8f5dce2..7023a09f8 100644
--- a/app/Controllers/Tax_categories.php
+++ b/app/Controllers/Tax_categories.php
@@ -50,7 +50,7 @@ class Tax_categories extends Secure_Controller
             $data_rows[] = get_tax_categories_data_row($tax_category);
         }
 
-        echo json_encode(['total' => $total_rows, 'rows' => $data_rows]);
+        $this->response->setJSON(['total' => $total_rows, 'rows' => $data_rows]);
     }
 
     /**
@@ -61,7 +61,7 @@ class Tax_categories extends Secure_Controller
     {
         $data_row = get_tax_categories_data_row($this->tax_category->get_info($row_id));
 
-        echo json_encode($data_row);
+        $this->response->setJSON($data_row);
     }
 
     /**
diff --git a/app/Controllers/Tax_codes.php b/app/Controllers/Tax_codes.php
index bedb06f1a..2217eb7a1 100644
--- a/app/Controllers/Tax_codes.php
+++ b/app/Controllers/Tax_codes.php
@@ -61,7 +61,7 @@ class Tax_codes extends Secure_Controller
             $data_rows[] = get_tax_code_data_row($tax_code);
         }
 
-        echo json_encode(['total' => $total_rows, 'rows' => $data_rows]);
+        $this->response->setJSON(['total' => $total_rows, 'rows' => $data_rows]);
     }
 
     /**
@@ -72,7 +72,7 @@ class Tax_codes extends Secure_Controller
     {
         $data_row = get_tax_code_data_row($this->tax_code->get_info($row_id));
 
-        echo json_encode($data_row);
+        $this->response->setJSON($data_row);
     }
 
     /**
@@ -102,20 +102,20 @@ class Tax_codes extends Secure_Controller
 
         if ($this->tax_code->save($tax_code_data)) {
             if ($tax_code_id == NEW_ENTRY) {
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => true,
                     'message' => lang('Tax_codes.successful_adding'),
                     'id'      => $tax_code_data['tax_code_id']
                 ]);
             } else {
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => true,
                     'message' => lang('Tax_codes.successful_updating'),
                     'id'      => $tax_code_id
                 ]);
             }
         } else {
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => false,
                 'message' => lang('Tax_codes.error_adding_updating') . ' ' . $tax_code_data['tax_code_id'],
                 'id'      => NEW_ENTRY
@@ -131,12 +131,12 @@ class Tax_codes extends Secure_Controller
         $tax_codes_to_delete = $this->request->getPost('ids', FILTER_SANITIZE_NUMBER_INT);
 
         if ($this->tax_code->delete_list($tax_codes_to_delete)) {
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => true,
                 'message' => lang('Tax_codes.successful_deleted') . ' ' . count($tax_codes_to_delete) . ' ' . lang('Tax_codes.one_or_multiple')
             ]);
         } else {
-            echo json_encode(['success' => false, 'message' => lang('Tax_codes.cannot_be_deleted')]);
+            $this->response->setJSON(['success' => false, 'message' => lang('Tax_codes.cannot_be_deleted')]);
         }
     }
 }
diff --git a/app/Controllers/Tax_jurisdictions.php b/app/Controllers/Tax_jurisdictions.php
index 1dedf857a..5b7c60643 100644
--- a/app/Controllers/Tax_jurisdictions.php
+++ b/app/Controllers/Tax_jurisdictions.php
@@ -53,7 +53,7 @@ class Tax_jurisdictions extends Secure_Controller
             $data_rows[] = get_tax_jurisdictions_data_row($tax_jurisdiction);
         }
 
-        echo json_encode(['total' => $total_rows, 'rows' => $data_rows]);
+        $this->response->setJSON(['total' => $total_rows, 'rows' => $data_rows]);
     }
 
     /**
@@ -64,7 +64,7 @@ class Tax_jurisdictions extends Secure_Controller
     {
         $data_row = get_tax_jurisdictions_data_row($this->tax_jurisdiction->get_info($row_id));
 
-        echo json_encode($data_row);
+        $this->response->setJSON($data_row);
     }
 
     /**
@@ -92,20 +92,20 @@ class Tax_jurisdictions extends Secure_Controller
 
         if ($this->tax_jurisdiction->save_value($tax_jurisdiction_data)) {
             if ($jurisdiction_id == NEW_ENTRY) {
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => true,
                     'message' => lang('Tax_jurisdictions.successful_adding'),
                     'id'      => $tax_jurisdiction_data['jurisdiction_id']
                 ]);
             } else {
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => true,
                     'message' => lang('Tax_jurisdictions.successful_updating'),
                     'id'      => $jurisdiction_id
                 ]);
             }
         } else {
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => false,
                 'message' => lang('Tax_jurisdictions.error_adding_updating') . ' ' . $tax_jurisdiction_data['jurisdiction_name'],
                 'id'      => NEW_ENTRY
@@ -121,12 +121,12 @@ class Tax_jurisdictions extends Secure_Controller
         $tax_jurisdictions_to_delete = $this->request->getPost('ids', FILTER_SANITIZE_NUMBER_INT);
 
         if ($this->tax_jurisdiction->delete_list($tax_jurisdictions_to_delete)) {
-            echo json_encode([
+            $this->response->setJSON([
                 'success' => true,
                 'message' => lang('Tax_jurisdictions.successful_deleted') . ' ' . count($tax_jurisdictions_to_delete) . ' ' . lang('Tax_jurisdictions.one_or_multiple')
             ]);
         } else {
-            echo json_encode(['success' => false, 'message' => lang('Tax_jurisdictions.cannot_be_deleted')]);
+            $this->response->setJSON(['success' => false, 'message' => lang('Tax_jurisdictions.cannot_be_deleted')]);
         }
     }
 }
diff --git a/app/Controllers/Taxes.php b/app/Controllers/Taxes.php
index 83c393f81..9f19b46eb 100644
--- a/app/Controllers/Taxes.php
+++ b/app/Controllers/Taxes.php
@@ -92,7 +92,7 @@ class Taxes extends Secure_Controller
             $data_rows[] = get_tax_rates_data_row($tax_rate_row);
         }
 
-        echo json_encode(['total' => $total_rows, 'rows' => $data_rows]);
+        $this->response->setJSON(['total' => $total_rows, 'rows' => $data_rows]);
     }
 
     /**
@@ -103,7 +103,7 @@ class Taxes extends Secure_Controller
         $search = $this->request->getPost('term');
         $suggestions = $this->tax->get_search_suggestions($search);    // TODO: There is no get_search_suggestions function in the tax model
 
-        echo json_encode($suggestions);
+        $this->response->setJSON($suggestions);
     }
 
     /**
@@ -116,7 +116,7 @@ class Taxes extends Secure_Controller
         $search = $this->request->getPost('term');
         $suggestions = $this->tax_category->get_tax_category_suggestions($search);
 
-        echo json_encode($suggestions);
+        $this->response->setJSON($suggestions);
     }
 
 
@@ -128,7 +128,7 @@ class Taxes extends Secure_Controller
     {
         $data_row = get_tax_rates_data_row($this->tax->get_info($row_id));
 
-        echo json_encode($data_row);
+        $this->response->setJSON($data_row);
     }
 
     /**
@@ -388,12 +388,12 @@ class Taxes extends Secure_Controller
 
         if ($this->tax->save_value($tax_rate_data, $tax_rate_id)) {
             if ($tax_rate_id == NEW_ENTRY) {    // TODO: this needs to be replaced with ternary notation
-                echo json_encode(['success' => true, 'message' => lang('Taxes.tax_rate_successfully_added')]);
+                $this->response->setJSON(['success' => true, 'message' => lang('Taxes.tax_rate_successfully_added')]);
             } else { // Existing tax_code
-                echo json_encode(['success' => true, 'message' => lang('Taxes.tax_rate_successful_updated')]);
+                $this->response->setJSON(['success' => true, 'message' => lang('Taxes.tax_rate_successful_updated')]);
             }
         } else {
-            echo json_encode(['success' => false, 'message' => lang('Taxes.tax_rate_error_adding_updating')]);
+            $this->response->setJSON(['success' => false, 'message' => lang('Taxes.tax_rate_error_adding_updating')]);
         }
     }
 
@@ -405,9 +405,9 @@ class Taxes extends Secure_Controller
         $tax_codes_to_delete = $this->request->getPost('ids', FILTER_SANITIZE_NUMBER_INT);
 
         if ($this->tax->delete_list($tax_codes_to_delete)) {    // TODO: this needs to be replaced with ternary notation
-            echo json_encode(['success' => true, 'message' => lang('Taxes.tax_code_successful_deleted')]);
+            $this->response->setJSON(['success' => true, 'message' => lang('Taxes.tax_code_successful_deleted')]);
         } else {
-            echo json_encode(['success' => false, 'message' => lang('Taxes.tax_code_cannot_be_deleted')]);
+            $this->response->setJSON(['success' => false, 'message' => lang('Taxes.tax_code_cannot_be_deleted')]);
         }
     }
 
@@ -422,7 +422,7 @@ class Taxes extends Secure_Controller
         $search = $this->request->getPostGet('term');
         $suggestions = $this->tax_code->get_tax_codes_search_suggestions($search);
 
-        echo json_encode($suggestions);
+        $this->response->setJSON($suggestions);
     }
 
     /**
@@ -452,7 +452,7 @@ class Taxes extends Secure_Controller
 
         $success = $this->tax_code->save_tax_codes($array_save);
 
-        echo json_encode([
+        $this->response->setJSON([
             'success' => $success,
             'message' => lang('Taxes.tax_codes_saved_' . ($success ? '' : 'un') . 'successfully')
         ]);
@@ -489,7 +489,7 @@ class Taxes extends Secure_Controller
             ];
 
             if (in_array($tax_group[$key], $unique_tax_groups)) {    // TODO: This can be replaced with `in_array($tax_group[$key], $unique_tax_groups)`
-                echo json_encode([
+                $this->response->setJSON([
                     'success' => false,
                     'message' => lang('Taxes.tax_group_not_unique', [$tax_group[$key]])
                 ]);
diff --git a/app/Libraries/Barcode_lib.php b/app/Libraries/Barcode_lib.php
index ddf743cc0..202457adc 100644
--- a/app/Libraries/Barcode_lib.php
+++ b/app/Libraries/Barcode_lib.php
@@ -172,7 +172,7 @@ class Barcode_lib
         if ($layout_type == 'name') {
             $result = $item['name'];
         } elseif ($layout_type == 'category' && isset($item['category'])) {
-            $result = lang('Items.category') . " " . $item['category'];
+            $result = lang('Items.category') . " " . esc($item['category']);
         } elseif ($layout_type == 'cost_price' && isset($item['cost_price'])) {
             $result = lang('Items.cost_price') . " " . to_currency($item['cost_price']);
         } elseif ($layout_type == 'unit_price' && isset($item['unit_price'])) {