databasePluginStore.go

package nucleus

import (
	"context"
	"fmt"

	"code.fbi.h-da.de/danet/gosdn/controller/customerrs"
	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/plugin"
	"code.fbi.h-da.de/danet/gosdn/controller/store"
	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/bson/primitive"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"

	log "github.com/sirupsen/logrus"
)

const storeName = "plugins-store.json"

// DatabasePluginStore is used to store Plugins.
type DatabasePluginStore struct {
	collection *mongo.Collection
}

func NewDatabasePluginStore(db *mongo.Database) *DatabasePluginStore {
	collection := db.Collection(storeName)

	return &DatabasePluginStore{
		collection: collection,
	}
}

// Add adds a plugin.
func (s *DatabasePluginStore) Add(ctx context.Context, pluginToAdd plugin.Plugin) (err error) {
	_, err = s.collection.InsertOne(ctx, pluginToAdd)
	if err != nil {
		if mongo.IsDuplicateKeyError(err) {
			return nil
		}

		return customerrs.CouldNotCreateError{Identifier: pluginToAdd.ID(), Type: pluginToAdd, Err: err}
	}

	return nil
}

// Update updates an existing plugin.
func (s *DatabasePluginStore) Update(ctx context.Context, pluginToUpdate plugin.Plugin) (err error) {
	var updatedLoadedPlugin plugin.LoadedPlugin

	update := bson.D{primitive.E{Key: "$set", Value: pluginToUpdate}}

	upsert := false
	after := options.After
	opt := options.FindOneAndUpdateOptions{
		Upsert:         &upsert,
		ReturnDocument: &after,
	}

	err = s.collection.FindOneAndUpdate(
		ctx, bson.M{"_id": pluginToUpdate.ID().String()}, update, &opt).
		Decode(&updatedLoadedPlugin)
	if err != nil {
		log.Printf("Could not update Plugin: %v", err)

		return customerrs.CouldNotUpdateError{Identifier: pluginToUpdate.ID(), Type: pluginToUpdate, Err: err}
	}

	return nil
}

// Delete deletes an plugin.
func (s *DatabasePluginStore) Delete(ctx context.Context, pluginToDelete plugin.Plugin) (err error) {
	_, err = s.collection.DeleteOne(ctx, bson.D{primitive.E{Key: "_id", Value: pluginToDelete.ID().String()}})
	if err != nil {
		return customerrs.CouldNotDeleteError{Identifier: pluginToDelete.ID(), Type: pluginToDelete, Err: err}
	}

	return nil
}

// Get takes a SouthboundInterface's UUID or name and returns the SouthboundInterface. If the requested
// SouthboundInterface does not exist an error is returned.
func (s *DatabasePluginStore) Get(ctx context.Context, query store.Query) (loadedPlugin plugin.LoadedPlugin, err error) {
	result := s.collection.FindOne(ctx, bson.D{primitive.E{Key: "_id", Value: query.ID.String()}})
	if result == nil {
		return loadedPlugin, customerrs.CouldNotFindError{ID: query.ID}
	}

	err = result.Decode(&loadedPlugin)
	if err != nil {
		log.Printf("Failed marshalling %v", err)

		return loadedPlugin, customerrs.CouldNotMarshallError{Identifier: query.ID, Type: loadedPlugin, Err: err}
	}

	return loadedPlugin, nil
}

// GetAll returns all plugin.
func (s *DatabasePluginStore) GetAll(ctx context.Context) (loadedPlugins []plugin.LoadedPlugin, err error) {
	cursor, err := s.collection.Find(ctx, bson.D{})
	if err != nil {
		return nil, err
	}
	defer func() {
		if ferr := cursor.Close(ctx); ferr != nil {
			fErrString := ferr.Error()
			err = fmt.Errorf("InternalError=%w DeferError=%+s", err, fErrString)
		}
	}()

	err = cursor.All(ctx, &loadedPlugins)
	if err != nil {
		log.Printf("Failed marshalling %v", err)

		return nil, customerrs.CouldNotMarshallError{Type: loadedPlugins, Err: err}
	}

	return loadedPlugins, nil
}