oc-lib/dbs/mongo/mongo.go
2024-07-22 16:57:54 +02:00

200 lines
5.7 KiB
Go

package mongo
import (
"context"
"errors"
"fmt"
"time"
"cloud.o-forge.io/core/oc-lib/dbs"
"cloud.o-forge.io/core/oc-lib/logs"
"github.com/rs/zerolog"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
var (
mngoClient *mongo.Client
mngoDB *mongo.Database
MngoCtx context.Context
cancel context.CancelFunc
existingCollections []string
ResourceMap map[string]interface{}
)
var MONGOService = MongoDB{}
type MongoConf interface {
GetUrl() string
GetDatabase() string
}
type MongoDB struct {
Logger zerolog.Logger
}
func (m *MongoDB) Init(collections []string, config MongoConf) {
// var baseConfig string
m.Logger = logs.GetLogger()
ResourceMap = make(map[string]interface{})
m.Logger.Info().Msg("Connecting to" + config.GetUrl())
MngoCtx, cancel = context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
m.createClient(config.GetUrl())
m.Logger.Info().Msg("Connecting mongo client to db " + config.GetDatabase())
m.prepareDB(collections, config)
m.Logger.Info().Msg("Database is READY")
}
func (m *MongoDB) createClient(MongoURL string) {
var err error
// Allows us to use marshal and unmarshall with results of FindOne() and others
bsonOpts := &options.BSONOptions{
UseJSONStructTags: true,
NilSliceAsEmpty: true,
}
clientOptions := options.Client().ApplyURI(MongoURL).SetBSONOptions(bsonOpts)
mngoClient, err = mongo.Connect(MngoCtx, clientOptions)
if err != nil {
m.Logger.Fatal().Msg("Mongodb NewClient " + MongoURL + ":" + "err")
panic(err)
}
// Ping the primary
if mngoClient, err = mongo.Connect(MngoCtx, clientOptions); err != nil {
m.Logger.Fatal().Msg("Mongodb connect " + MongoURL + ":" + "err")
panic(err)
}
if err = mngoClient.Ping(MngoCtx, nil); err != nil {
m.Logger.Fatal().Msg("Mongodb ping " + MongoURL + ":" + "err")
panic(err)
}
}
func (m *MongoDB) prepareDB(list_collection []string, config MongoConf) {
var err error
mngoDB = mngoClient.Database(config.GetDatabase())
existingCollections, err = mngoDB.ListCollectionNames(MngoCtx, bson.D{})
if err != nil {
m.Logger.Fatal().Msg("Error contacting MongoDB\n" + err.Error())
}
collectionMap := make(map[string]bool)
for _, name := range existingCollections {
collectionMap[name] = true
}
// Only do the collection definition process if it doesn't already exists
// we add the collection to the collection map from mongo/mongo_utils to provide faster access to the collection
for _, collection_name := range list_collection {
new_collection := mngoDB.Collection(collection_name)
if _, exists := collectionMap[collection_name]; !exists {
m.createCollection(collection_name, new_collection)
} else {
CollectionMap[collection_name] = new_collection
}
}
}
// Creates the collection with index specified in mongo/mongo_collections
// or use the basic collection creation function
func (m *MongoDB) createCollection(collection_name string, new_collection *mongo.Collection) {
var err error
CollectionMap[collection_name] = new_collection
_, exists := IndexesMap[collection_name]
if exists {
if _, err = new_collection.Indexes().CreateMany(MngoCtx, IndexesMap[collection_name]); err != nil {
var cmdErr mongo.CommandError
if errors.As(err, &cmdErr) && cmdErr.Code != 85 {
m.Logger.Fatal().Msg("Error creating indexes for " + collection_name + " collection : \n" + err.Error())
panic(err)
} else if !errors.As(err, &cmdErr) {
m.Logger.Fatal().Msg("Unexpected error: " + err.Error())
panic(err)
}
}
} else {
mngoDB.CreateCollection(MngoCtx, collection_name)
}
}
func (m *MongoDB) DeleteOne(id string, collection_name string) (int64, int, error) {
filter := bson.M{"_id": id}
targetDBCollection := CollectionMap[collection_name]
opts := options.Delete().SetHint(bson.D{{Key: "_id", Value: 1}})
MngoCtx, cancel = context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
result, err := targetDBCollection.DeleteOne(MngoCtx, filter, opts)
if err != nil {
m.Logger.Error().Msg("Couldn't insert resource: " + err.Error())
return 0, 404, err
}
return result.DeletedCount, 200, nil
}
func (m *MongoDB) UpdateOne(set interface{}, id string, collection_name string) (string, int, error) {
var doc map[string]interface{}
b, _ := bson.Marshal(set)
bson.Unmarshal(b, &doc)
filter := bson.M{"_id": id}
targetDBCollection := CollectionMap[collection_name]
MngoCtx, cancel = context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
fmt.Println(doc)
_, err := targetDBCollection.UpdateOne(MngoCtx, filter, dbs.InputToBson(doc, true))
if err != nil {
m.Logger.Error().Msg("Couldn't update resource: " + err.Error())
return "", 404, err
}
return id, 200, nil
}
func (m *MongoDB) StoreOne(obj interface{}, id string, collection_name string) (string, int, error) {
var doc map[string]interface{}
b, _ := bson.Marshal(obj)
bson.Unmarshal(b, &doc)
doc["_id"] = id
targetDBCollection := CollectionMap[collection_name]
MngoCtx, cancel = context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
_, err := targetDBCollection.InsertOne(MngoCtx, doc)
if err != nil {
m.Logger.Error().Msg("Couldn't insert resource: " + err.Error())
return "", 409, err
}
return id, 200, nil
}
func (m *MongoDB) LoadOne(id string, collection_name string) (*mongo.SingleResult, int, error) {
filter := bson.M{"_id": id}
targetDBCollection := CollectionMap[collection_name]
MngoCtx, cancel = context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
res := targetDBCollection.FindOne(MngoCtx, filter)
if res.Err() != nil {
m.Logger.Error().Msg("Couldn't find resource " + id + ". Error : " + res.Err().Error())
err := res.Err()
return nil, 404, err
}
return res, 200, nil
}