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wakapi/config/config.go

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package config
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import (
"encoding/json"
"flag"
"fmt"
"github.com/gorilla/securecookie"
"github.com/jinzhu/configor"
"github.com/muety/wakapi/models"
migrate "github.com/rubenv/sql-migrate"
"gorm.io/driver/mysql"
"gorm.io/driver/postgres"
"gorm.io/driver/sqlite"
"gorm.io/gorm"
"io/ioutil"
"log"
"net/http"
"os"
"strings"
)
const (
defaultConfigPath = "config.yml"
defaultConfigPathLegacy = "config.ini"
defaultEnvConfigPathLegacy = ".env"
SQLDialectMysql = "mysql"
SQLDialectPostgres = "postgres"
SQLDialectSqlite = "sqlite3"
)
var cfg *Config
var cFlag = flag.String("config", defaultConfigPath, "config file location")
type appConfig struct {
AggregationTime string `yaml:"aggregation_time" default:"02:15" env:"WAKAPI_AGGREGATION_TIME"`
CustomLanguages map[string]string `yaml:"custom_languages"`
LanguageColors map[string]string `yaml:"-"`
}
type securityConfig struct {
// this is actually a pepper (https://en.wikipedia.org/wiki/Pepper_(cryptography))
PasswordSalt string `yaml:"password_salt" default:"" env:"WAKAPI_PASSWORD_SALT"`
InsecureCookies bool `yaml:"insecure_cookies" default:"false" env:"WAKAPI_INSECURE_COOKIES"`
CookieMaxAgeSec int `yaml:"cookie_max_age" default:"172800" env:"WAKAPI_COOKIE_MAX_AGE"`
SecureCookie *securecookie.SecureCookie `yaml:"-"`
}
type dbConfig struct {
Host string `env:"WAKAPI_DB_HOST"`
Port uint `env:"WAKAPI_DB_PORT"`
User string `env:"WAKAPI_DB_USER"`
Password string `env:"WAKAPI_DB_PASSWORD"`
Name string `default:"wakapi_db.db" env:"WAKAPI_DB_NAME"`
Dialect string `default:"sqlite3" env:"WAKAPI_DB_TYPE"`
MaxConn uint `yaml:"max_conn" default:"2" env:"WAKAPI_DB_MAX_CONNECTIONS"`
}
type serverConfig struct {
Port int `default:"3000" env:"WAKAPI_PORT"`
ListenIpV4 string `yaml:"listen_ipv4" default:"127.0.0.1" env:"WAKAPI_LISTEN_IPV4"`
BasePath string `yaml:"base_path" default:"/" env:"WAKAPI_BASE_PATH"`
}
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type Config struct {
Env string `default:"dev" env:"ENVIRONMENT"`
Version string `yaml:"-"`
App appConfig
Security securityConfig
Db dbConfig
Server serverConfig
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}
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func (c *Config) CreateCookie(name, value, path string) *http.Cookie {
return c.createCookie(name, value, path, c.Security.CookieMaxAgeSec)
}
func (c *Config) GetClearCookie(name, path string) *http.Cookie {
return c.createCookie(name, "", path, -1)
}
func (c *Config) createCookie(name, value, path string, maxAge int) *http.Cookie {
return &http.Cookie{
Name: name,
Value: value,
Path: path,
MaxAge: maxAge,
Secure: !c.Security.InsecureCookies,
HttpOnly: true,
SameSite: http.SameSiteStrictMode,
}
}
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func (c *Config) IsDev() bool {
return IsDev(c.Env)
}
func (c *Config) GetMigrationFunc(dbDialect string) models.MigrationFunc {
switch dbDialect {
default:
return func(db *gorm.DB) error {
db.AutoMigrate(&models.User{})
db.AutoMigrate(&models.KeyStringValue{})
db.AutoMigrate(&models.Alias{})
db.AutoMigrate(&models.Heartbeat{})
db.AutoMigrate(&models.Summary{})
db.AutoMigrate(&models.SummaryItem{})
db.AutoMigrate(&models.LanguageMapping{})
return nil
}
}
}
func (c *Config) GetFixturesFunc(dbDialect string) models.MigrationFunc {
return func(db *gorm.DB) error {
migrations := &migrate.FileMigrationSource{
Dir: "migrations/common/fixtures",
}
migrate.SetIgnoreUnknown(true)
sqlDb, _ := db.DB()
n, err := migrate.Exec(sqlDb, dbDialect, migrations, migrate.Up)
if err != nil {
return err
}
log.Printf("applied %d fixtures\n", n)
return nil
}
}
func (c *dbConfig) GetDialector() gorm.Dialector {
switch c.Dialect {
case SQLDialectMysql:
return mysql.New(mysql.Config{
DriverName: c.Dialect,
DSN: mysqlConnectionString(c),
})
case SQLDialectPostgres:
return postgres.New(postgres.Config{
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DSN: postgresConnectionString(c),
})
case SQLDialectSqlite:
return sqlite.Open(sqliteConnectionString(c))
}
return nil
}
func mysqlConnectionString(config *dbConfig) string {
//location, _ := time.LoadLocation("Local")
return fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=utf8&parseTime=true&loc=%s&sql_mode=ANSI_QUOTES",
config.User,
config.Password,
config.Host,
config.Port,
config.Name,
"Local",
)
}
func postgresConnectionString(config *dbConfig) string {
return fmt.Sprintf("host=%s port=%d user=%s dbname=%s password=%s sslmode=disable",
config.Host,
config.Port,
config.User,
config.Name,
config.Password,
)
}
func sqliteConnectionString(config *dbConfig) string {
return config.Name
}
func IsDev(env string) bool {
return env == "dev" || env == "development"
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}
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func readVersion() string {
file, err := os.Open("version.txt")
if err != nil {
log.Fatal(err)
}
defer file.Close()
bytes, err := ioutil.ReadAll(file)
if err != nil {
log.Fatal(err)
}
return string(bytes)
}
func readLanguageColors() map[string]string {
// Read language colors
// Source: https://raw.githubusercontent.com/ozh/github-colors/master/colors.json
var colors = make(map[string]string)
var rawColors map[string]struct {
Color string `json:"color"`
Url string `json:"url"`
}
data, err := ioutil.ReadFile("data/colors.json")
if err != nil {
log.Fatal(err)
}
if err := json.Unmarshal(data, &rawColors); err != nil {
log.Fatal(err)
}
for k, v := range rawColors {
colors[strings.ToLower(k)] = v.Color
}
return colors
}
func mustReadConfigLocation() string {
if _, err := os.Stat(*cFlag); err != nil {
log.Fatalf("failed to find config file at '%s'\n", *cFlag)
}
return *cFlag
}
func Set(config *Config) {
cfg = config
}
func Get() *Config {
return cfg
}
func Load() *Config {
config := &Config{}
flag.Parse()
maybeMigrateLegacyConfig()
if err := configor.New(&configor.Config{}).Load(config, mustReadConfigLocation()); err != nil {
log.Fatalf("failed to read config: %v\n", err)
}
config.Version = readVersion()
config.App.LanguageColors = readLanguageColors()
config.Security.SecureCookie = securecookie.New(
securecookie.GenerateRandomKey(64),
securecookie.GenerateRandomKey(32),
)
if strings.HasSuffix(config.Server.BasePath, "/") {
config.Server.BasePath = config.Server.BasePath[:len(config.Server.BasePath)-1]
}
for k, v := range config.App.CustomLanguages {
if v == "" {
config.App.CustomLanguages[k] = "unknown"
}
}
Set(config)
return Get()
}