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database.go
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database.go
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package veego
import (
"errors"
"fmt"
"net"
"net/url"
"strings"
"github.com/jinzhu/gorm"
_ "github.com/jinzhu/gorm/dialects/mysql"
_ "github.com/jinzhu/gorm/dialects/postgres"
)
type databaseManager struct {
databaseURL string
options *options
}
var (
defaultSSLMode = "disable"
)
type DBOptions func(*options)
type options struct {
SSLMode string
}
type dBParams struct {
Schema string
Host string
Username string
Password string
Database string
Port string
}
func NewDatabaseManager(databaseURL string, options ...DBOptions) *databaseManager {
return &databaseManager{
databaseURL: databaseURL,
options: parseOptions(options),
}
}
func parseOptions(dbOptions []DBOptions) *options {
opts := &options{
SSLMode: defaultSSLMode,
}
for _, option := range dbOptions {
option(opts)
}
return opts
}
func (d *databaseManager) Connect() (*gorm.DB, error) {
params, err := d.urlParser()
if err != nil {
return nil, err
}
switch params.Schema {
case "mysql":
db, err := gorm.Open("mysql", fmt.Sprintf(`%s:%s@tcp(%s:%s)/%s?charset=utf8&parseTime=true`, params.Username, params.Password, params.Host, params.Port, params.Database))
if err != nil {
return nil, err
}
return db, nil
case "postgres":
db, err := gorm.Open("postgres", fmt.Sprintf("host=%s port=%s user=%s dbname=%s password=%s sslmode=%s", params.Host, params.Port, params.Username, params.Database, params.Password, d.options.SSLMode))
if err != nil {
return nil, err
}
return db, nil
case "mssql":
db, err := gorm.Open("mssql", fmt.Sprintf("sqlserver://%s:%s@%s:%s?database=%s", params.Username, params.Password, params.Host, params.Port, params.Database))
if err != nil {
return nil, err
}
return db, nil
default:
return nil, errors.New("unknown Database schema")
}
}
func ConfigureSSLMode(state string) DBOptions {
return func(o *options) {
o.SSLMode = state
}
}
func (d *databaseManager) urlParser() (*dBParams, error) {
var host, port, path, password string
var err error
u, err := url.Parse(d.databaseURL)
if err != nil {
return &dBParams{}, err
}
if host, port, err = net.SplitHostPort(u.Host); err == nil {
} else {
host = u.Host
}
if strings.Contains(u.Path, "/") {
path = strings.Split(u.Path, "/")[1]
} else {
path = u.Path
}
if pwd, ok := u.User.Password(); ok {
password = pwd
}
return &dBParams{
Schema: u.Scheme,
Username: u.User.Username(),
Password: password,
Host: host,
Database: path,
Port: port,
}, nil
}