feat: add platform-collection relationship in platform.FetchCollection()

pkg/platform.go

@@ -2,23 +2,6 @@ package synchronizator
 
 import "slices"
 
-type PlatformClass interface {
-	// How to transform the struct into a node. It needs to return the class,
-	// name and a []byte representation of the metadata.
-	//
-	// - name: A user friendly name
-	// - metadata: Arbitrary data. This will be stored as a jsonb in the database
-	//
-	ToNode() (string, []byte, error)
-
-	// How to transform a node into the struct. This method should modify the
-	// struct directly as it receives a pointer.
-	//
-	// - name: A user friendly name
-	// - metadata: Arbitrary data. This is stored as a jsonb in the database
-	FromNode(string, []byte) error
-}
-
 // Utility struct to represent a collection of nodes, it's a [Node] itself so all
 // the node's functionality is available.
 type Platform struct {
@@ -26,22 +9,6 @@ type Platform struct {
 	Collections []*Collection // Child nodes
 }
 
-type Fetcher = func(pagination Pagination) ([]*Collection, Pagination, error)
-
-type Pagination struct {
-	Total   int
-	HasMore bool
-	Limit   int
-	Offset  int
-}
-
-var StartPagination = Pagination{
-	Total:   0,
-	HasMore: false,
-	Limit:   10,
-	Offset:  0,
-}
-
 func (platform *Platform) FetchCollections(fetcher Fetcher, start_pagination Pagination) error {
 	collections, pagination, err := fetcher(start_pagination)
 	if err != nil {
@@ -54,6 +21,26 @@ func (platform *Platform) FetchCollections(fetcher Fetcher, start_pagination Pag
 	}
 
 	err = BulkCreateNode(platform._conn, platform.Collections)
+	if err != nil {
+		return err
+	}
+
+	for _, item := range platform.Collections {
+		err := platform.AddRelationship(
+			&Relationship{
+				_class: "PLATFORM_HAS_COLLECTION",
+				From:   platform.Id,
+				To:     item.Id,
+			})
+		if err != nil {
+			return err
+		}
+	}
+
+	err = BulkCreateRelationships(platform._conn, platform._relationships)
+	if err != nil {
+		return err
+	}
 
 	return nil
 }