eth-ipfs-state-validator/pkg/database.go

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// VulcanizeDB
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// Copyright © 2020 Vulcanize
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// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package validator
import (
"fmt"
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"os"
"strconv"
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"github.com/jmoiron/sqlx"
"github.com/spf13/viper"
)
// Env variables
const (
DATABASE_NAME = "DATABASE_NAME"
DATABASE_HOSTNAME = "DATABASE_HOSTNAME"
DATABASE_PORT = "DATABASE_PORT"
DATABASE_USER = "DATABASE_USER"
DATABASE_PASSWORD = "DATABASE_PASSWORD"
)
type Config struct {
Hostname string
Name string
User string
Password string
Port int
}
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// NewDB returns a new sqlx.DB from config/cli/env variables
func NewDB() (*sqlx.DB, error) {
c := Config{}
LoadViper(&c)
return sqlx.Connect("postgres", c.ConnString())
}
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func (c *Config) ConnString() string {
if len(c.User) > 0 && len(c.Password) > 0 {
return fmt.Sprintf("postgresql://%s:%s@%s:%d/%s?sslmode=disable",
c.User, c.Password, c.Hostname, c.Port, c.Name)
}
if len(c.User) > 0 && len(c.Password) == 0 {
return fmt.Sprintf("postgresql://%s@%s:%d/%s?sslmode=disable",
c.User, c.Hostname, c.Port, c.Name)
}
return fmt.Sprintf("postgresql://%s:%d/%s?sslmode=disable", c.Hostname, c.Port, c.Name)
}
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func LoadEnv(c *Config) error {
if val := os.Getenv(DATABASE_NAME); val != "" {
c.Name = val
}
if val := os.Getenv(DATABASE_HOSTNAME); val != "" {
c.Hostname = val
}
if val := os.Getenv(DATABASE_PORT); val != "" {
port, err := strconv.Atoi(val)
if err != nil {
return err
}
c.Port = port
}
if val := os.Getenv(DATABASE_USER); val != "" {
c.User = val
}
if val := os.Getenv(DATABASE_PASSWORD); val != "" {
c.Password = val
}
return nil
}
func LoadViper(c *Config) {
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viper.BindEnv("database.name", DATABASE_NAME)
viper.BindEnv("database.hostname", DATABASE_HOSTNAME)
viper.BindEnv("database.port", DATABASE_PORT)
viper.BindEnv("database.user", DATABASE_USER)
viper.BindEnv("database.password", DATABASE_PASSWORD)
c.Name = viper.GetString("database.name")
c.Hostname = viper.GetString("database.hostname")
c.Port = viper.GetInt("database.port")
c.User = viper.GetString("database.user")
c.Password = viper.GetString("database.password")
}