Initial work, copied from the Shopify provider

framework/saleor/product/get-all-collections.ts

@@ -0,0 +1,29 @@
+import { CollectionEdge } from '../schema'
+import { getConfig, SaleorConfig } from '../api'
+import getAllCollectionsQuery from '../utils/queries/get-all-collections-query'
+
+const getAllCollections = async (options?: {
+  variables?: any
+  config: SaleorConfig
+  preview?: boolean
+}) => {
+  let { config, variables = { first: 250 } } = options ?? {}
+  config = getConfig(config)
+
+  const { data } = await config.fetch(getAllCollectionsQuery, { variables })
+  const edges = data.collections?.edges ?? []
+
+  const categories = edges.map(
+    ({ node: { id: entityId, title: name, handle } }: CollectionEdge) => ({
+      entityId,
+      name,
+      path: `/${handle}`,
+    })
+  )
+
+  return {
+    categories,
+  }
+}
+
+export default getAllCollections