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package mongodb
import (
"context"
"fmt"
"net"
"net/url"
"strings"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
"go.mongodb.org/mongo-driver/x/mongo/driver/connstring"
"code.crute.us/mcrute/golib/vault"
)
// AnyInTopLevelArray is just a convenience method so apps don't have to repeat
// this ugly bson expression.
func AnyInTopLevelArray(k string, v interface{}) bson.M {
return bson.M{k: bson.M{"$all": bson.A{v}}}
}
type Mongo struct {
client *mongo.Client
db *mongo.Database
}
func Connect(ctx context.Context, uri string, vc vault.VaultClient) (*Mongo, error) {
db := &Mongo{}
// Prefix uri with mongodb:// unless it already includes one of the
// standard prefixes (only these two are valid). Otherwise if scheme is
// omitted then url parsing will fail to capture the username for Vault
// lookup.
if !strings.HasPrefix(uri, "mongodb://") && !strings.HasPrefix(uri, "mongodb+srv://") {
uri = "mongodb://" + uri
}
u, err := url.Parse(uri)
if err != nil {
return nil, err
}
// The username provided by the user (there should be no
// password) will be a reference to a vault material with the
// prefix database/creds/. This needs to be replaced with the real
// username/password pair fetched from Vault before attempting to
// connect.
cred, err := vc.DbCredential(ctx, u.User.Username())
if err != nil {
return nil, err
}
u.User = url.UserPassword(cred.Username, cred.Password)
// User may imply the default port
if u.Port() == "" {
u.Host = net.JoinHostPort(u.Host, "27017")
}
// Users should generally authenticate against the admin collection so
// they should only specify it if they need to override that.
if u.Query().Get("authSource") == "" {
pq := u.Query()
pq.Add("authSource", "admin")
u.RawQuery = pq.Encode()
}
cs, err := connstring.ParseAndValidate(u.String())
if err != nil {
return nil, err
}
client, err := mongo.Connect(ctx, options.Client().ApplyURI(u.String()))
if err != nil {
return nil, err
}
db.client = client
db.db = client.Database(cs.Database)
return db, nil
}
func (m *Mongo) Collection(name string) *mongo.Collection {
return m.db.Collection(name)
}
func (m *Mongo) FindAllByFilter(ctx context.Context, cn string, filter interface{}, out interface{}) error {
res, err := m.db.Collection(cn).Find(ctx, filter)
if err != nil {
return err
}
if err = res.All(ctx, out); err != nil {
return err
}
return nil
}
func (m *Mongo) FindAll(ctx context.Context, cn string, out interface{}) error {
return m.FindAllByFilter(ctx, cn, bson.D{}, out)
}
func (m *Mongo) FindOneByFilter(ctx context.Context, cn string, filter interface{}, out interface{}) error {
if err := m.db.Collection(cn).FindOne(ctx, filter).Decode(out); err != nil {
return err
}
return nil
}
func (m *Mongo) FindOneById(ctx context.Context, cn string, id string, out interface{}) error {
return m.FindOneByFilter(ctx, cn, bson.M{"_id": id}, out)
}
func (m *Mongo) InsertOne(ctx context.Context, cn string, in interface{}) error {
_, err := m.db.Collection(cn).InsertOne(ctx, in)
if err != nil {
return err
}
return nil
}
func (m *Mongo) ReplaceOneByFilter(ctx context.Context, cn string, filter interface{}, in interface{}) error {
tp := true
opts := &options.ReplaceOptions{Upsert: &tp}
if _, err := m.db.Collection(cn).ReplaceOne(ctx, filter, in, opts); err != nil {
return err
}
return nil
}
func (m *Mongo) ReplaceOneById(ctx context.Context, cn string, id string, in interface{}) error {
return m.ReplaceOneByFilter(ctx, cn, bson.M{"_id": id}, in)
}
func (m *Mongo) DeleteOneByFilter(ctx context.Context, cn string, filter interface{}) error {
dr, err := m.db.Collection(cn).DeleteOne(ctx, filter)
if err != nil {
return err
}
if dr.DeletedCount != 1 {
return fmt.Errorf("Invalid deletion record count %d not 1", dr.DeletedCount)
}
return nil
}
func (m *Mongo) DeleteOneById(ctx context.Context, cn string, id string) error {
return m.DeleteOneByFilter(ctx, cn, bson.M{"_id": id})
}
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