Add coupon example

Added 5 promotions and one coupon to each. We display a message on product/123 about which coupons can be used in relation to that product.

That's going to be better.

1. +++ b/commerce_demo.module
   @@ -81,3 +81,23 @@ function commerce_demo_preprocess_breadcrumb(&$variables) {
   +function commerce_demo_entity_view(array &$build, \Drupal\Core\Entity\EntityInterface $entity, \Drupal\Core\Entity\Display\EntityViewDisplayInterface $display, $view_mode) {
   

   We could just target commerce_demo_commerce_product_view to remove one entity type check

2. +++ b/commerce_demo.module
   @@ -81,3 +81,23 @@ function commerce_demo_preprocess_breadcrumb(&$variables) {
   +  \Drupal::messenger()->addStatus(t('The following coupon codes can be used with this product:'));
   +  \Drupal::messenger()->addStatus(t('"BUY1GET2" Buy 1 get 2'));
   +  \Drupal::messenger()->addStatus(t('"ORDER3USD" 3 USD discount on whole order'));
   +  \Drupal::messenger()->addStatus(t('"FIFTEENPERCENT" 15% discount on an order'));
   ...
   +    \Drupal::messenger()->addStatus(t('"TYPEWRITER" 20% discount on typewriter'));
   ...
   +    \Drupal::messenger()->addStatus(t('"CLOCKDISCOUNT" 4 USD discount on clock'));
   

   Let's just do $messenger = ... once and invoke that

3. +++ b/commerce_demo.module
   @@ -81,3 +81,23 @@ function commerce_demo_preprocess_breadcrumb(&$variables) {
   +  if ($entity->id() == 5) {
   ...
   +  if ($entity->id() == 21) {
   

   We should probably target the UUID here, since the UUID in our export persists.

   And I'm pretty sure that our conditions target UUIDs.

   There's a chance someone may have made a product before importing? Maybe?

Fixed all the things as all the things made sense.

Wrapping this up.

The patch dies if commerce_promotion is not enabled.

+++ b/content/commerce_promotion.commerce_promotion.yml
@@ -0,0 +1,75 @@
+  order_types:
+    - default

We need to also target `physical`

This fixes install. Discussed w/ czigor and it would be good to add some kind of messaging in the checkout as well. I forgot what coupon codes I could use by the time I hit checkout.

+++ b/content/commerce_promotion.commerce_promotion.yml
@@ -0,0 +1,80 @@
+  name: 'Buy 1 Get 2'
...
+    target_plugin_configuration: 'a:7:{s:12:"buy_quantity";s:1:"1";s:14:"buy_conditions";a:1:{i:0;a:2:{s:6:"plugin";s:23:"order_item_product_type";s:13:"configuration";a:1:{s:13:"product_types";a:3:{i:0;s:8:"clothing";i:1;s:7:"default";i:2;s:6:"simple";}}}}s:12:"get_quantity";s:1:"1";s:14:"get_conditions";a:1:{i:0;a:2:{s:6:"plugin";s:23:"order_item_product_type";s:13:"configuration";a:1:{s:13:"product_types";a:3:{i:0;s:8:"clothing";i:1;s:7:"default";i:2;s:6:"simple";}}}}s:10:"offer_type";s:10:"percentage";s:16:"offer_percentage";s:1:"1";s:12:"offer_amount";N;}'

This is configured wrong and is currently acting as a B1G1

Okay, here is the patch I'm preparing to commit.

The checkout shows available coupons that can be used for the order

And viewing a product shows a message

+++ b/src/ContentExporter.php
@@ -246,6 +250,30 @@ class ContentExporter {
+      $variations[$coupon->uuid()] = $this->export($coupon);
+      // The array is keyed by UUID, no need to have it in the export too.
+      unset($variations[$coupon->uuid()]['uuid']);
+    }
+    $export['variations'] = $variations;

Copy paste fail, times two.

I had exported coupon changes and found them lost. Manually replaced and fixed this without manually testing the export, again. 🤦🤦

Updated patch.

+++ b/src/ContentImporter.php
@@ -197,24 +201,33 @@ class ContentImporter {
+  protected function processReferences(array $values, EntityInterface $entity, $field_name) {
...
+      $entity = $this->importEntity($entity_type_id, $entity_values);

Slightly concerned here we're overwriting a parameter.

Okay, here we go!

Here's some more tweaks. Missed the promotion_id back reference in the export. Also B1G2 to B1G1

Discussed with rszrama, and we want to make the demo coupon text on checkout more obvious that it's part of the demo.

Example:

\o/ landed.