Added ability to allow free cost usage.

Author: TobiasLufinity

Block/Catalog/Product/Usage.php

@@ -235,6 +235,7 @@ public function getUsagesSelectHtml(
                 [
                     'price' => $this->pricingHelper->currencyByStore($usage->getPrice(), $store, false),
                     'data-terms' => $usage->getTerms(),
+                    'data-is-free' => $usage->getIsFree(),
                 ]
             );
         }

Setup/UpgradeData.php

@@ -57,6 +57,23 @@ public function upgrade(ModuleDataSetupInterface $setup, ModuleContextInterface
                 ->save();
         }
 
+
+        if (version_compare($context->getVersion(), '1.0.6') < 0) {
+            $usageSetup->addAttribute(
+                'devstone_usage',
+                'is_free',
+                [
+                    'type' => 'int',
+                    'label' => 'Can be free',
+                    'input' => 'select',
+                    'source' => \Magento\Eav\Model\Entity\Attribute\Source\Boolean::class,
+                    'sort_order' => 25,
+                    'global' => \Magento\Eav\Model\Entity\Attribute\ScopedAttributeInterface::SCOPE_STORE,
+                    'group' => 'General Information',
+                ]
+            );
+        }
+
         $usageSetup->installEntities();
         $entities = $usageSetup->getDefaultEntities();
         foreach ($entities as $entityName => $entity) {

etc/module.xml

@@ -1,5 +1,5 @@
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
-    <module name="DevStone_UsageCalculator" setup_version="1.0.5" >
+    <module name="DevStone_UsageCalculator" setup_version="1.0.6" >
         <sequence>
             <module name="Magento_Catalog"/>
             <module name="Magento_Sales"/>

view/adminhtml/ui_component/devstone_usagecalculator_usage_form.xml

@@ -129,6 +129,35 @@
                 </item>
             </argument>
         </field>
+        <field name="is_free" formElement="select">
+            <argument name="data" xsi:type="array">
+                <item name="config" xsi:type="array">
+                    <item name="source" xsi:type="string">main_fieldset</item>
+                </item>
+            </argument>
+            <settings>
+                <dataType>number</dataType>
+                <label translate="true">Can be free</label>
+                <visible>true</visible>
+                <dataScope>is_free</dataScope>
+            </settings>
+            <formElements>
+                <select>
+                    <settings>
+                        <options>
+                            <option name="0" xsi:type="array">
+                                <item name="value" xsi:type="number">0</item>
+                                <item name="label" xsi:type="string" translate="true">No</item>
+                            </option>
+                            <option name="1" xsi:type="array">
+                                <item name="value" xsi:type="number">1</item>
+                                <item name="label" xsi:type="string" translate="true">Yes</item>
+                            </option>
+                        </options>
+                    </settings>
+                </select>
+            </formElements>
+        </field>
         <field name="is_active" formElement="select">
             <argument name="data" xsi:type="array">
                 <item name="config" xsi:type="array">

view/frontend/web/usage.js

@@ -191,6 +191,7 @@ define([
 
             if (isNaN(finalPrice)) {
                 finalPrice = 0;
+                terms = "";
             }
 
             if (95 !== ((finalPrice * 100) % 100)) {
@@ -208,7 +209,7 @@ define([
                 }
             });
 
-            if (finalPrice <= 0) {
+            if (finalPrice <= 0 && !$usage.data('is-free')) {
                 $(self.options.priceHolderSelector + ', .product-options-bottom').hide();
                 $('#usages-advice-container').html('');
             } else {