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database.go
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database.go
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package database
import (
"fmt"
"sync"
"time"
"github.com/JIexa24/chef-webapi/database/interfaces"
"github.com/JIexa24/chef-webapi/database/mongo"
"github.com/JIexa24/chef-webapi/encryption"
"github.com/JIexa24/chef-webapi/logging"
)
// Params describes database parameters.
type Params struct {
Host string
Port string
User string
Password string
Name string
DatabaseProvider string
SessionProvider string
}
// ConstructDSN from parameters into string.
func (d *Params) ConstructDSN() string {
dsn := ""
switch d.DatabaseProvider {
case "mongo":
dsn = fmt.Sprintf("mongodb://%s:%s@%s:%s/%s",
d.User, d.Password, d.Host, d.Port, d.Name)
default:
}
return dsn
}
// NewParams return empty database params.
func NewParams() *Params {
return &Params{
Host: "unknown",
Port: "unknown",
User: "unknown",
Password: "unknown",
Name: "unknown",
DatabaseProvider: "unknown",
SessionProvider: "unknown",
}
}
// DBConnector describes the structure of the database and
// implements the Database interface.
type DBConnector struct {
Database interfaces.Database
SessionDatabase interfaces.Database
Params *Params
StopRequest chan struct{}
waitGroup sync.WaitGroup
pause time.Duration
}
// NewDatabaseConnector return database connector with session connector.
// Initialize memory db if databaseProvider in-memory.
func NewDatabaseConnector(env string, dbParams *Params, l logging.Logger) (*DBConnector, error) {
db := &DBConnector{
Database: nil,
SessionDatabase: nil,
Params: dbParams,
StopRequest: make(chan struct{}),
waitGroup: sync.WaitGroup{},
pause: time.Hour,
}
dsn := db.Params.ConstructDSN()
switch db.Params.DatabaseProvider {
case "mongo":
database, err := mongo.New(dsn, db.Params.Name, l)
if err != nil {
return nil, err
}
db.Database = database
db.initialize(l)
default:
return nil, fmt.Errorf("unknown provider %s",
db.Params.DatabaseProvider)
}
switch db.Params.SessionProvider {
case "database", db.Params.DatabaseProvider:
db.SessionDatabase = db.Database
default:
return nil, fmt.Errorf("unknown provider %s",
db.Params.SessionProvider)
}
db.waitGroup.Add(1)
go db.sessionWatcher(l)
return db, nil
}
// Close connector.
func (db *DBConnector) Close() {
close(db.StopRequest)
db.waitGroup.Wait()
switch db.Params.DatabaseProvider {
case "mongo":
db.Database.Close()
default:
}
}
func (db *DBConnector) initialize(l logging.Logger) {
err := db.CreateAppModules()
if err != nil {
l.Fatalf("%s", err.Error())
}
users, err := db.GetAllUsers()
if err != nil {
l.Fatalf("%s", err.Error())
}
if len(users) < 1 {
admpwd, err := encryption.GetPasswordHASH([]byte("admin"))
if err != nil {
l.Fatalf("Database initialize: %s", err.Error())
}
testpwd, err := encryption.GetPasswordHASH([]byte("tester"))
if err != nil {
l.Fatalf("Database initialize: %s", err.Error())
}
user, err := db.CreateUser("admin", string(admpwd),
"Admin^)", true, false)
if err == nil && user != nil {
user.Avatar = "https://svoi.sibnet.ru/photos/80x80/1399830_0.jpg"
if err := db.UpdateUserByID(user.ID, user); err != nil {
l.Errorf("Database initialize [db.UpdateUserByID]: %s", err.Error())
}
}
if err != nil {
l.Errorf("Database initialize: %s", err.Error())
}
_, err = db.CreateUser("tester", string(testpwd),
"Just mortal",
false, false)
if err != nil {
l.Errorf("Database initialize: %s", err.Error())
}
}
}
func (db *DBConnector) sessionWatcher(l logging.Logger) {
defer db.waitGroup.Done()
// Flow check request for completion of work.
exit := false
go func() {
<-db.StopRequest
exit = true
}()
timeoutChannel := make(chan bool)
for !exit {
if err := db.Database.DeleteExpireSession(); err != nil {
l.Errorf("Database DeleteExpireSession: %s", err.Error())
}
go func() {
// Waiting one of two signals.
select {
// Pause not to load the CPU.
case <-time.After(db.pause):
case <-db.StopRequest:
}
timeoutChannel <- true
}()
<-timeoutChannel
}
}
// UploadFile uploads file to database.
func (db *DBConnector) UploadFile(path, filename string) error {
return db.Database.UploadFile(path, filename)
}
// DownloadFile downloads file from database.
func (db *DBConnector) DownloadFile(filename string) []byte {
return db.Database.DownloadFile(filename)
}
// CheckFile check file in database.
func (db *DBConnector) CheckFile(filename string) bool {
return db.Database.CheckFile(filename)
}