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package main
import (
"context"
"errors"
"fmt"
log "github.com/sirupsen/logrus"
"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"
)
// Collections names
const Connections = "connections"
const ConnectionStreams = "connection_streams"
const ImportingSessions = "importing_sessions"
const Rules = "rules"
var ZeroRowID [12]byte
type Storage interface {
Insert(collectionName string) InsertOperation
Update(collectionName string) UpdateOperation
Find(collectionName string) FindOperation
}
type MongoStorage struct {
client *mongo.Client
collections map[string]*mongo.Collection
}
type OrderedDocument = bson.D
type UnorderedDocument = bson.M
type Entry = bson.E
type RowID = primitive.ObjectID
func NewMongoStorage(uri string, port int, database string) *MongoStorage {
opt := options.Client()
opt.ApplyURI(fmt.Sprintf("mongodb://%s:%v", uri, port))
client, err := mongo.NewClient(opt)
if err != nil {
log.WithError(err).Panic("failed to create mongo client")
}
db := client.Database(database)
collections := map[string]*mongo.Collection{
Connections: db.Collection(Connections),
ConnectionStreams: db.Collection(ConnectionStreams),
ImportingSessions: db.Collection(ImportingSessions),
Rules: db.Collection(Rules),
}
return &MongoStorage{
client: client,
collections: collections,
}
}
func (storage *MongoStorage) Connect(ctx context.Context) error {
return storage.client.Connect(ctx)
}
// InsertOne and InsertMany
type InsertOperation interface {
Context(ctx context.Context) InsertOperation
StopOnFail(stop bool) InsertOperation
One(document interface{}) (interface{}, error)
Many(documents []interface{}) ([]interface{}, error)
}
type MongoInsertOperation struct {
collection *mongo.Collection
ctx context.Context
optInsertMany *options.InsertManyOptions
err error
}
func (fo MongoInsertOperation) Context(ctx context.Context) InsertOperation {
fo.ctx = ctx
return fo
}
func (fo MongoInsertOperation) StopOnFail(stop bool) InsertOperation {
fo.optInsertMany.SetOrdered(stop)
return fo
}
func (fo MongoInsertOperation) One(document interface{}) (interface{}, error) {
if fo.err != nil {
return nil, fo.err
}
result, err := fo.collection.InsertOne(fo.ctx, document)
if err != nil {
return nil, err
}
return result.InsertedID, nil
}
func (fo MongoInsertOperation) Many(documents []interface{}) ([]interface{}, error) {
if fo.err != nil {
return nil, fo.err
}
results, err := fo.collection.InsertMany(fo.ctx, documents, fo.optInsertMany)
if err != nil {
return nil, err
}
return results.InsertedIDs, nil
}
func (storage *MongoStorage) Insert(collectionName string) InsertOperation {
collection, ok := storage.collections[collectionName]
op := MongoInsertOperation{
collection: collection,
optInsertMany: options.InsertMany(),
}
if !ok {
op.err = errors.New("invalid collection: " + collectionName)
}
return op
}
// UpdateOne and UpdateMany
type UpdateOperation interface {
Context(ctx context.Context) UpdateOperation
Filter(filter OrderedDocument) UpdateOperation
Upsert(upsertResults *interface{}) UpdateOperation
One(update interface{}) (bool, error)
Many(update interface{}) (int64, error)
}
type MongoUpdateOperation struct {
collection *mongo.Collection
filter OrderedDocument
update OrderedDocument
ctx context.Context
opt *options.UpdateOptions
upsertResult *interface{}
err error
}
func (fo MongoUpdateOperation) Context(ctx context.Context) UpdateOperation {
fo.ctx = ctx
return fo
}
func (fo MongoUpdateOperation) Filter(filter OrderedDocument) UpdateOperation {
fo.filter = filter
return fo
}
func (fo MongoUpdateOperation) Upsert(upsertResults *interface{}) UpdateOperation {
fo.upsertResult = upsertResults
fo.opt.SetUpsert(true)
return fo
}
func (fo MongoUpdateOperation) One(update interface{}) (bool, error) {
if fo.err != nil {
return false, fo.err
}
for i := range fo.update {
fo.update[i].Value = update
}
result, err := fo.collection.UpdateOne(fo.ctx, fo.filter, fo.update, fo.opt)
if err != nil {
return false, err
}
if fo.upsertResult != nil {
*(fo.upsertResult) = result.UpsertedID
}
return result.ModifiedCount == 1, nil
}
func (fo MongoUpdateOperation) Many(update interface{}) (int64, error) {
if fo.err != nil {
return 0, fo.err
}
for i := range fo.update {
fo.update[i].Value = update
}
result, err := fo.collection.UpdateMany(fo.ctx, fo.filter, fo.update, fo.opt)
if err != nil {
return 0, err
}
if fo.upsertResult != nil {
*(fo.upsertResult) = result.UpsertedID
}
return result.ModifiedCount, nil
}
func (storage *MongoStorage) Update(collectionName string) UpdateOperation {
collection, ok := storage.collections[collectionName]
op := MongoUpdateOperation{
collection: collection,
filter: OrderedDocument{},
update: OrderedDocument{{"$set", nil}},
opt: options.Update(),
}
if !ok {
op.err = errors.New("invalid collection: " + collectionName)
}
return op
}
// Find and FindOne
type FindOperation interface {
Context(ctx context.Context) FindOperation
Filter(filter OrderedDocument) FindOperation
Sort(field string, ascending bool) FindOperation
Limit(n int64) FindOperation
First(result interface{}) error
All(results interface{}) error
}
type MongoFindOperation struct {
collection *mongo.Collection
filter OrderedDocument
ctx context.Context
optFind *options.FindOptions
optFindOne *options.FindOneOptions
sorts []Entry
err error
}
func (fo MongoFindOperation) Context(ctx context.Context) FindOperation {
fo.ctx = ctx
return fo
}
func (fo MongoFindOperation) Filter(filter OrderedDocument) FindOperation {
fo.filter = filter
return fo
}
func (fo MongoFindOperation) Limit(n int64) FindOperation {
fo.optFind.SetLimit(n)
return fo
}
func (fo MongoFindOperation) Sort(field string, ascending bool) FindOperation {
var sort int
if ascending {
sort = 1
} else {
sort = -1
}
fo.sorts = append(fo.sorts, primitive.E{Key: field, Value: sort})
fo.optFind.SetSort(fo.sorts)
fo.optFindOne.SetSort(fo.sorts)
return fo
}
func (fo MongoFindOperation) First(result interface{}) error {
if fo.err != nil {
return fo.err
}
err := fo.collection.FindOne(fo.ctx, fo.filter, fo.optFindOne).Decode(result)
if err != nil {
if err == mongo.ErrNoDocuments {
result = nil
return nil
}
return err
}
return nil
}
func (fo MongoFindOperation) All(results interface{}) error {
if fo.err != nil {
return fo.err
}
cursor, err := fo.collection.Find(fo.ctx, fo.filter, fo.optFind)
if err != nil {
return err
}
err = cursor.All(fo.ctx, results)
if err != nil {
return err
}
return nil
}
func (storage *MongoStorage) Find(collectionName string) FindOperation {
collection, ok := storage.collections[collectionName]
op := MongoFindOperation{
collection: collection,
filter: OrderedDocument{},
optFind: options.Find(),
optFindOne: options.FindOne(),
sorts: OrderedDocument{},
}
if !ok {
op.err = errors.New("invalid collection: " + collectionName)
}
return op
}
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