Updated Saleor Provider (#356)

* Initial work, copied from the Shopify provider

* Added basis setup and type generation for the products queries

* refactor: adjust the types

* task: relax the Node.js constraint

* fix: page/product properties

* disable unknown fields

* mention Saleor in the README

* setup debugging for Next.js

* Check nextjs-commerce bug if no images are added for a product

* fix: client/server pecularities for env visibility

Must prefix with `NEXT_PUBLIC_` so that the API URL is
visible on the client

* re: make search work with Saleor API (WIP)

* task: update deps

* task: move to Webpack 5.x

* saleor: initial cart integration

* update deps

* saleor: shall the cart appear!

* task: remove deprecated packages

* saleor: adding/removing from the cart

* saleor: preliminary signup process

* saleor: fix the prices in the cart

* update deps

* update deps

* Added the options for a variant to the product page

* Mapped options to variants

* Mapped options to variants

* saleor: refine the auth process

* saleor: remove unused code

* saleor: handle customer find via refresh

temporary solution

* saleor: update deps

* saleor: fix the session handling

* saleor: fix the variants

* saleor: simplify the naming for GraphQL statements

* saleor: fix the type for collection

* saleor: arrange the error codes

* saleor: integrate collections

* saleor: fix product sorting

* saleor: set cookie location

* saleor: update the schema

* saleor: attach checkout to customer

* saleor: fix the checkout flow

* saleor: unify GraphQL naming approach

* task: update deps

* Add the env variables for saleor to the template

* task: prettier

* saleor: stub API for build/typescript compilation

thanks @cond0r

* task: temporarily disable for the `build`

* saleor: refactor GraphQL queries

* saleor: adjust the config

* task: update dependencies

* revert: Next.js to `10.0.9`

* saleor: fix the checkout fetch query

* task: update dependencies

* saleor: adapt for displaying featured products

* saleor: update the provider structure

* saleor: make the home page representable

* feature/cart: display the variant name (cond)

Co-authored-by: Patryk Zawadzki <patrys@room-303.com>
Co-authored-by: royderks <10717410+royderks@users.noreply.github.com>

framework/saleor/utils/fragments/checkout-details.ts

@@ -0,0 +1,49 @@
+export const CheckoutDetails = /* GraphQL */ `
+  fragment CheckoutDetails on Checkout {
+    id
+    token
+    created
+    totalPrice {
+      currency
+      gross {
+        amount
+      }
+    }
+    subtotalPrice {
+      currency
+      gross {
+        amount
+      }
+    }
+
+    lines {
+      id
+      variant {
+        id
+        name
+        sku
+        product {
+          name
+          slug
+        }
+        media {
+          url
+        }
+        pricing {
+          price {
+            gross {
+              amount
+            }
+          }
+        }
+      }
+      quantity
+      totalPrice {
+        currency
+        gross {
+          amount
+        }
+      }
+    }
+  }
+`

framework/saleor/utils/fragments/index.ts

@@ -0,0 +1,2 @@
+export { ProductConnection } from './product'
+export { CheckoutDetails } from './checkout-details'

framework/saleor/utils/fragments/product.ts

@@ -0,0 +1,29 @@
+export const ProductConnection = /* GraphQL */ `
+  fragment ProductConnection on ProductCountableConnection {
+    pageInfo {
+      hasNextPage
+      hasPreviousPage
+    }
+    edges {
+      node {
+        id
+        name
+        description
+        slug
+        pricing {
+          priceRange {
+            start {
+              net {
+                amount
+              }
+            }
+          }
+        }
+        media {
+          url
+          alt
+        }
+      }
+    }
+  }
+`