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package db
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import (
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"net/url"
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"strings"
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"time"
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"gopkg.in/mgo.v2"
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"gopkg.in/mgo.v2/bson"
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)
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type Config struct {
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Hosts []string
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// AuthSource Specify the database name associated with the user’s credentials.
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// authSource defaults to the database specified in the connection string.
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AuthSource string
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UserName string
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Password string
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Database string
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Timeout time.Duration // second
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}
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type Mdb struct {
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*Config
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*mgo.Session
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}
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func NewMdb(c *Config) (*Mdb, error) {
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m := &Mdb{
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Config: c,
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}
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return m, m.connect()
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}
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func (m *Mdb) connect() error {
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// connectionString: [mongodb://][user:pass@]host1[:port1][,host2[:port2],...][/database][?options]
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// via: https://docs.mongodb.com/manual/reference/connection-string/
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connectionString := strings.Join(m.Config.Hosts, ",")
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if len(m.Config.UserName) > 0 && len(m.Config.Password) > 0 {
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connectionString = m.Config.UserName + ":" + url.QueryEscape(m.Config.Password) + "@" + connectionString
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}
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if len(m.Config.Database) > 0 {
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connectionString += "/" + m.Config.Database
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}
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if len(m.Config.AuthSource) > 0 {
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connectionString += "?authSource=" + m.Config.AuthSource
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}
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session, err := mgo.DialWithTimeout(connectionString, m.Config.Timeout)
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if err != nil {
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return err
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}
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m.Session = session
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return nil
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}
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func (m *Mdb) WithC(collection string, job func(*mgo.Collection) error) error {
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s := m.Session.New()
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err := job(s.DB(m.Config.Database).C(collection))
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s.Close()
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return err
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}
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func (self *Mdb) Upsert(collection string, selector interface{}, change interface{}) error {
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return self.WithC(collection, func(c *mgo.Collection) error {
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_, err := c.Upsert(selector, change)
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return err
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})
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}
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func (self *Mdb) Insert(collection string, data ...interface{}) error {
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return self.WithC(collection, func(c *mgo.Collection) error {
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return c.Insert(data...)
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})
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}
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func (self *Mdb) FindId(collection string, id interface{}, result interface{}) error {
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return self.WithC(collection, func(c *mgo.Collection) error {
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return c.Find(bson.M{"_id": id}).One(result)
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})
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}
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func (self *Mdb) FindOne(collection string, query interface{}, result interface{}) error {
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return self.WithC(collection, func(c *mgo.Collection) error {
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return c.Find(query).One(result)
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})
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}
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func (self *Mdb) RemoveId(collection string, id interface{}) error {
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return self.WithC(collection, func(c *mgo.Collection) error {
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return c.RemoveId(id)
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})
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}
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