added mutations

internal/mutations.go

@@ -0,0 +1,77 @@
+package s3browser
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/minio/minio-go/v7"
+)
+
+func deleteMutation(ctx context.Context, id string) error {
+	s3Client, ok := ctx.Value("s3Client").(*minio.Client)
+
+	if !ok {
+		return fmt.Errorf("Failed to get s3Client from context")
+	}
+
+	// TODO: it is posible to remove multiple objects with a single call.
+	// Is it better to batch this?
+	return s3Client.RemoveObject(ctx, bucketName, id, minio.RemoveObjectOptions{})
+}
+
+func copyMutation(ctx context.Context, src, dest string) (*File, error) {
+	s3Client, ok := ctx.Value("s3Client").(*minio.Client)
+
+	if !ok {
+		return nil, fmt.Errorf("Failed to get s3Client from context")
+	}
+
+	info, err := s3Client.CopyObject(ctx, minio.CopyDestOptions{
+		Bucket: bucketName,
+		Object: dest,
+	}, minio.CopySrcOptions{
+		Bucket: bucketName,
+		Object: src,
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	return &File{
+		ID: info.Key,
+	}, nil
+
+}
+
+func moveMutation(ctx context.Context, src, dest string) (*File, error) {
+	s3Client, ok := ctx.Value("s3Client").(*minio.Client)
+
+	if !ok {
+		return nil, fmt.Errorf("Failed to get s3Client from context")
+	}
+
+	// There is no (spoon) move. Only copy and delete
+	info, err := s3Client.CopyObject(ctx, minio.CopyDestOptions{
+		Bucket: bucketName,
+		Object: dest,
+	}, minio.CopySrcOptions{
+		Bucket: bucketName,
+		Object: src,
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	err = deleteMutation(ctx, src)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return &File{
+		ID: info.Key,
+	}, nil
+
+}

internal/schema.go

@@ -10,7 +10,7 @@ import (
 // graphqlSchema generate the schema with its root query and mutation
 func graphqlSchema() (graphql.Schema, error) {
 
-	fields := graphql.Fields{
+	queryFields := graphql.Fields{
 		"files": &graphql.Field{
 			Type: graphql.NewNonNull(graphql.NewList(graphqlFileType)),
 			Args: graphql.FieldConfigArgument{
@@ -67,13 +67,84 @@ func graphqlSchema() (graphql.Schema, error) {
 		},
 	}
 
+	mutationFields := graphql.Fields{
+		"delete": &graphql.Field{
+			Type: graphql.String,
+			Args: graphql.FieldConfigArgument{
+				"id": &graphql.ArgumentConfig{
+					Type: graphql.NewNonNull(graphql.ID),
+				},
+			},
+			Resolve: func(p graphql.ResolveParams) (interface{}, error) {
+				id, ok := p.Args["id"].(string)
+				if !ok {
+					return nil, fmt.Errorf("Failed to parse args")
+				}
+
+				return id, deleteMutation(p.Context, id)
+			},
+		},
+		"copy": &graphql.Field{
+			Type: graphqlFileType,
+			Args: graphql.FieldConfigArgument{
+				"src": &graphql.ArgumentConfig{
+					Type: graphql.NewNonNull(graphql.ID),
+				},
+				"dest": &graphql.ArgumentConfig{
+					Type: graphql.NewNonNull(graphql.ID),
+				},
+			},
+			Resolve: func(p graphql.ResolveParams) (interface{}, error) {
+				src, ok := p.Args["src"].(string)
+				if !ok {
+					return nil, fmt.Errorf("Failed to parse args")
+				}
+				dest, ok := p.Args["dest"].(string)
+				if !ok {
+					return nil, fmt.Errorf("Failed to parse args")
+				}
+
+				return copyMutation(p.Context, src, dest)
+			},
+		},
+		"move": &graphql.Field{
+			Type: graphqlFileType,
+			Args: graphql.FieldConfigArgument{
+				"src": &graphql.ArgumentConfig{
+					Type: graphql.NewNonNull(graphql.ID),
+				},
+				"dest": &graphql.ArgumentConfig{
+					Type: graphql.NewNonNull(graphql.ID),
+				},
+			},
+			Resolve: func(p graphql.ResolveParams) (interface{}, error) {
+				src, ok := p.Args["src"].(string)
+				if !ok {
+					return nil, fmt.Errorf("Failed to parse args")
+				}
+				dest, ok := p.Args["dest"].(string)
+				if !ok {
+					return nil, fmt.Errorf("Failed to parse args")
+				}
+
+				return moveMutation(p.Context, src, dest)
+			},
+		},
+	}
+
 	rootQuery := graphql.ObjectConfig{
 		Name:   "RootQuery",
-		Fields: fields,
+		Fields: queryFields,
+	}
+
+	rootMutation := graphql.ObjectConfig{
+		Name:   "RootMutation",
+		Fields: mutationFields,
 	}
 
 	schemaConfig := graphql.SchemaConfig{
-		Query: graphql.NewObject(rootQuery),
+		Query:    graphql.NewObject(rootQuery),
+		Mutation: graphql.NewObject(rootMutation),
 	}
 
 	return graphql.NewSchema(schemaConfig)