make soft credits optional

CRM/TwingleCampaign/BAO/Configuration.php

@@ -7,6 +7,7 @@ class CRM_TwingleCampaign_BAO_Configuration {
     'twingle_api_key',
     'twinglecampaign_xcm_profile',
     'twinglecampaign_start_case',
+    'twinglecampaign_soft_credits'
   ];
 
 
@@ -17,13 +18,19 @@ class CRM_TwingleCampaign_BAO_Configuration {
    * Expects an array with key => value for the setting
    */
   public static function set(array $settings) {
+
+      // Set twinglecampaign_soft_credits to '0' if checkbox is unchecked
+      if (!array_key_exists('twinglecampaign_soft_credits', $settings)) {
+        Civi::settings()->set('twinglecampaign_soft_credits', 0);
+      }
+      
       Civi::settings()->add($settings);
   }
 
 
   /**
    * Returns a specific value of a setting if the key is passed as parameter.
-   * Else all settings will be returned als associative array.
+   * Else all settings will be returned as associative array.
    *
    * @param null $key
    * The name of the setting or NULL
@@ -31,7 +38,7 @@ class CRM_TwingleCampaign_BAO_Configuration {
    * @return array|mixed|null
    */
   public static function get($key = NULL) {
-    if ($key) {
+    if (!is_null($key)) {
       return Civi::settings()->get($key);
     }
     else {

CRM/TwingleCampaign/Form/Settings.php

@@ -35,6 +35,13 @@ class CRM_TwingleCampaign_Form_Settings extends CRM_Core_Form {
       ['class' => 'crm-select2 huge']
     );
 
+    $this->addElement(
+      'checkbox',
+      'twinglecampaign_soft_credits',
+      E::ts('Create soft credits for event initiators'),
+      FALSE
+    );
+
     $this->addButtons([
       [
         'type'      => 'submit',

CRM/TwingleCampaign/Utils/APIWrapper.php

@@ -1,6 +1,7 @@
 <?php
 
 use CRM_TwingleCampaign_ExtensionUtil as E;
+use CRM_TwingleCampaign_BAO_Configuration as Configuration;
 
 /**
  * # APIWrapper class for TwingleDonation.submit
@@ -31,7 +32,10 @@ class CRM_TwingleCampaign_Utils_APIWrapper {
    */
   public static function RESPOND($event) {
     $request = $event->getApiRequestSig();
-    if ($request == '3.twingledonation.submit') {
+    if (
+      $request == '3.twingledonation.submit' &&
+      Configuration::get('twinglecampaign_soft_credits')
+    ) {
 
       $response = $event->getResponse();
 

templates/CRM/TwingleCampaign/Form/Settings.tpl

@@ -21,6 +21,11 @@
         <div class="content">{$form.twinglecampaign_start_case.html}</div>
         <div class="clear"></div>
     </div>
+    <div class="crm-section">
+        <div class="label">{$form.twinglecampaign_soft_credits.label}</div>
+        <div class="content">{$form.twinglecampaign_soft_credits.html}</div>
+        <div class="clear"></div>
+    </div>
 </div>