Added custom field for soft credit on Add/Edit contribution form

softcreditcustomfields.php

@@ -173,4 +173,71 @@ function softcreditcustomfields_civicrm_buildForm($formName, &$form) {
       ));
     }
   }
+  if ('CRM_Contribute_Form_Contribution' == $formName && !($form->getVar('_action') & CRM_Core_Action::DELETE)) {
+    CRM_Core_Region::instance('page-footer')->add(array(
+      'template' => "CRM/Contribute/Form/SoftCredit-Custom.tpl",
+    ));
+    for ($blockId = 1; $blockId <= 10; $blockId++) {
+      $entityId = NULL;//CRM_Utils_Array::value('id', CRM_Utils_Array::value($blockId, $softCredits));
+      _softcreditcustomfields_addCustomDataToForm($form, $entityId, $blockId);
+    }
+
+  }
+}
+/**
+ * Add custom data to the form.
+ *
+ * @param CRM_Core_Form $form
+ * @param int $entityId
+ * @param int $blockId
+ */
+function _softcreditcustomfields_addCustomDataToForm(&$form, $entityId, $blockId) {
+  $groupTree = CRM_Core_BAO_CustomGroup::getTree('ContributionSoft', NULL, $entityId);
+
+  if (isset($groupTree) && is_array($groupTree)) {
+    // use simplified formatted groupTree
+    $groupTree = CRM_Core_BAO_CustomGroup::formatGroupTree($groupTree, 1, $form);
+    // make sure custom fields are added /w element-name in the format - 'soft_credit_amount[$blockId][custom-X]'
+    foreach ($groupTree as $id => $group) {
+      foreach ($group['fields'] as $fldId => $field) {
+        $groupTree[$id]['fields'][$fldId]['element_custom_name'] = $field['element_name'];
+        $groupTree[$id]['fields'][$fldId]['element_name'] = "soft_credit[$blockId][{$field['element_name']}]";
+      }
+    }
+
+    $defaults = [];
+    CRM_Core_BAO_CustomGroup::setDefaults($groupTree, $defaults);
+
+    // since we change element name for softCredit custom data, we need to format the setdefault values
+    $softCreditDefaults = [];
+    foreach ($defaults as $key => $val) {
+      if (empty($val)) {
+        continue;
+      }
+
+      // inorder to set correct defaults for checkbox custom data, we need to converted flat key to array
+      // this works for all types custom data
+      $keyValues = explode('[', str_replace(']', '', $key));
+      $softCreditDefaults[$keyValues[0]][$keyValues[1]][$keyValues[2]] = $val;
+    }
+
+    $form->setDefaults($softCreditDefaults);
+
+    // we setting the prefix to 'dnc_' below, so that we don't overwrite smarty's grouptree var.
+    // And we can't set it to 'soft_credit_' because we want to set it in a slightly different format.
+    CRM_Core_BAO_CustomGroup::buildQuickForm($form, $groupTree, FALSE, 'dnc_');
+
+    // during contact editing : if no softCredit is filled
+    // required custom data must not produce 'required' form rule error
+    // more handling done in formRule func
+    //self::storeRequiredCustomDataInfo($form, $groupTree);
+    $tplGroupTree = CRM_Core_Smarty::singleton()
+      ->get_template_vars('soft_credit_groupTree');
+    $tplGroupTree = empty($tplGroupTree) ? [] : $tplGroupTree;
+
+    $form->assign('soft_credit_groupTree', $tplGroupTree + [$blockId => $groupTree]);
+    // unset the temp smarty var that got created
+    $form->assign('dnc_groupTree', NULL);
+  }
+  // softCredit custom data processing ends ..
 }