refactoring to properly load stripe on submission error

See https://github.com/drastik/com.drastikbydesign.stripe/issues/76

stripe.php

@@ -147,15 +147,15 @@ function stripe_civicrm_validateForm($formName, &$fields, &$files, &$form, &$err
  * @param $form - reference to the form object
  */
 function stripe_civicrm_buildForm($formName, &$form) {
-  if (isset($form->_paymentProcessor['payment_processor_type']) && $form->_paymentProcessor['payment_processor_type'] == 'Stripe') {
+  $stripe_key = stripe_get_key($form);
+  if (!empty($stripe_key)) {
     if (!stristr($formName, '_Confirm') && !stristr($formName, '_ThankYou')) {
       // This is the 'Main', or first step of the form that collects CC data.
       if (!$form->elementExists('stripe_token')) {
         $form->setAttribute('class', $form->getAttribute('class') . ' stripe-payment-form');
         $form->addElement('hidden', 'stripe_token', NULL, array('id' => 'stripe-token'));
-        $form->addElement('hidden', 'stripe_id', $form->_paymentProcessor['id'], array('id' => 'stripe-id'));
-        stripe_add_stripe_js($form);
       }
+      stripe_add_stripe_js($stripe_key, $form);
     }
     else {
       // This is a Confirm or Thank You (completed) form.
@@ -167,8 +167,6 @@ function stripe_civicrm_buildForm($formName, &$form) {
       if (!empty($params['stripe_token'])) {
         // Stash the token (including its value) in Confirm, in case they go backwards.
         $form->addElement('hidden', 'stripe_token', $params['stripe_token'], array('id' => 'stripe-token'));
-        // Stash stripe payment processor id
-        $form->addElement('hidden', 'stripe_id', $form->_paymentProcessor['id'], array('id' => 'stripe-id'));
       }
     }
   }
@@ -180,14 +178,14 @@ function stripe_civicrm_buildForm($formName, &$form) {
     'CRM_Member_Form_Membership',
     'CRM_Member_Form_MembershipRenewal'
   );
-  if (in_array($formName, $backendForms) && !empty($form->_processors)) {
+  if (in_array($formName, $backendForms) && !empty($stripe_key)) {
     if (!isset($form->_elementIndex['stripe_token'])) {
       if (empty($form->_attributes['class'])) {
         $form->_attributes['class'] = '';
       }
       $form->_attributes['class'] .= ' stripe-payment-form';
       $form->addElement('hidden', 'stripe_token', NULL, array('id' => 'stripe-token'));
-      stripe_add_stripe_js($form);
+      stripe_add_stripe_js($stripe_key, $form);
     }
     // Add email field as it would usually be found on donation forms.
     if (!isset($form->_elementIndex['email']) && !empty($form->userEmail)) {
@@ -197,49 +195,58 @@ function stripe_civicrm_buildForm($formName, &$form) {
 }
 
 /**
- * Add publishable key and event bindings for Stripe.js.
+ * Return the stripe api public key (aka password) 
+ *
+ * If this form could conceiveably now or at any time in the future
+ * contain a Stripe payment processor, return the api public key for
+ * that processor. 
  */
-function stripe_add_stripe_js($form) {
-  if (!empty($form->_paymentProcessor['password'])) {
-    $stripe_pub_key = $form->_paymentProcessor['password'];
+function stripe_get_key($form) {
+  // Backend contribution pages have the password embedded in them.
+  if(isset($form->_paymentProcessor['password'])) {
+    return $form->_paymentProcessor['password'];
+  }
+  $is_test = 0;
+  if(isset($form->_mode)) {
+    $is_test = $form->_mode == 'live' ? 0 : 1;
   }
-  else {
-    // Find Stripe's payproc ID in Civi.
-    $query_params = array(
-      1 => array('Stripe', 'String'),
-    );
-    $stripe_pp_id = CRM_Core_DAO::singleValueQuery("SELECT id
-        FROM civicrm_payment_processor_type
-        WHERE name = %1", $query_params);
 
-    // Find out if the form might use Stripe.
-    if (!empty($stripe_pp_id)) {
-      $mode = ($form->_mode == 'live' ? 0 : 1);
-      $query_params = array(
-        1 => array($stripe_pp_id, 'Integer'),
-        2 => array($mode, 'Integer'),
-      );
-      $stripe_procs_query = CRM_Core_DAO::executeQuery("SELECT name, password
-          FROM civicrm_payment_processor
-          WHERE payment_processor_type_id = %1 AND is_test = %2", $query_params);
-      // Loop through and see if Stripe is on this form.
-      while ($stripe_procs_query->fetch()) {
-        foreach ($form->_processors as $form_processor) {
-          if ($form_processor == $stripe_procs_query->name) {
-            $stripe_pub_key = $stripe_procs_query->password;
-            break;
-          }
-          if (!empty($stripe_pub_key)) {
-            break;
-          }
-        }
+  // _paymentProcessors array seems to be the most reliable way to find
+  // at least payment processor on the form that is a stripe pp.
+  if(isset($form->_paymentProcessors)) {
+    foreach($form->_paymentProcessors as $k => $pp) {
+      if($pp['payment_processor_type'] == 'Stripe') {
+        // We have a match.
+        return stripe_get_key_for_name($pp['name'], $is_test);
       }
     }
   }
+}
+
+/**
+ * Given a payment processor name, return the pub key.
+ */
+function stripe_get_key_for_name($name, $is_test) {
+  try {
+    $params = array('name' => $name, 'is_test' => $is_test);
+    $results = civicrm_api3('PaymentProcessor', 'get', $params);
+    if($results['count'] == 1) {
+      $result = array_pop($results['values']);
+      return $result['password'];
+    }
+  }
+  catch (CiviCRM_API3_Exception $e) {
+    return NULL; 
+  }
+}
 
-  $form->addElement('hidden', 'stripe_pub_key', $stripe_pub_key, array('id' => 'stripe-pub-key'));
+/**
+ * Add publishable key and event bindings for Stripe.js.
+ */
+function stripe_add_stripe_js($stripe_key, $form) {
+  $form->addElement('hidden', 'stripe_pub_key', $stripe_key, array('id' => 'stripe-pub-key'));
   CRM_Core_Resources::singleton()
-    ->addScriptFile('com.drastikbydesign.stripe', 'js/civicrm_stripe.js', 0, 'billing-block', FALSE);
+    ->addScriptFile('com.drastikbydesign.stripe', 'js/civicrm_stripe.js', 0);
 }
 
 /**