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package main
import (
"context"
"errors"
"fmt"
"time"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
const defaultConnectionTimeout = 10*time.Second
const defaultOperationTimeout = 3*time.Second
type Storage struct {
client *mongo.Client
collections map[string]*mongo.Collection
}
type OrderedDocument = bson.D
type UnorderedDocument = bson.M
func NewStorage(uri string, port int, database string) Storage {
opt := options.Client()
opt.ApplyURI(fmt.Sprintf("mongodb://%s:%v", uri, port))
client, err := mongo.NewClient(opt)
if err != nil {
panic("Failed to create mongo client")
}
db := client.Database(database)
colls := map[string]*mongo.Collection{
"imported_pcaps": db.Collection("imported_pcaps"),
"connections": db.Collection("connections"),
}
return Storage{
client: client,
collections: colls,
}
}
func (storage *Storage) Connect(ctx context.Context) error {
if ctx == nil {
ctx, _ = context.WithTimeout(context.Background(), defaultConnectionTimeout)
}
return storage.client.Connect(ctx)
}
func (storage *Storage) InsertOne(ctx context.Context, collectionName string,
document interface{}) (interface{}, error) {
collection, ok := storage.collections[collectionName]
if !ok {
return nil, errors.New("invalid collection: " + collectionName)
}
if ctx == nil {
ctx, _ = context.WithTimeout(context.Background(), defaultOperationTimeout)
}
result, err := collection.InsertOne(ctx, document)
if err != nil {
return nil, err
}
return result.InsertedID, nil
}
func (storage *Storage) UpdateOne(ctx context.Context, collectionName string,
filter interface{}, update interface {}, upsert bool) (interface{}, error) {
collection, ok := storage.collections[collectionName]
if !ok {
return nil, errors.New("invalid collection: " + collectionName)
}
if ctx == nil {
ctx, _ = context.WithTimeout(context.Background(), defaultOperationTimeout)
}
opts := options.Update().SetUpsert(upsert)
update = bson.D{{"$set", update}}
result, err := collection.UpdateOne(ctx, filter, update, opts)
if err != nil {
return nil, err
}
if upsert {
return result.UpsertedID, nil
}
return result.ModifiedCount == 1, nil
}
func (storage *Storage) FindOne(ctx context.Context, collectionName string,
filter interface{}) (UnorderedDocument, error) {
collection, ok := storage.collections[collectionName]
if !ok {
return nil, errors.New("invalid collection: " + collectionName)
}
if ctx == nil {
ctx, _ = context.WithTimeout(context.Background(), defaultOperationTimeout)
}
var result bson.M
err := collection.FindOne(ctx, filter).Decode(&result)
if err != nil {
if err == mongo.ErrNoDocuments {
return nil, nil
}
return nil, err
}
return result, nil
}
func testStorage() {
storage := NewStorage("localhost", 27017, "testing")
_ = storage.Connect(nil)
id, err := storage.InsertOne(nil, "connections", bson.M{"_id": "provaaa"})
if err != nil {
panic(err)
} else {
fmt.Println(id)
}
}
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