go-guess/backend/internal/config/config.go
Daniel Noulet 5449cd3d8d feat: avatar, account menu, and single sign-on from Go Loose
Signing in now starts at the sign-in screen and one button that hands the
browser to Go Loose, which returns to the welcome page. Nothing redirects to the
identity provider on its own any more: that fired on every anonymous visit and
read as a redirect loop rather than as a choice to sign in. The password form
remains only where the API reports that Go Loose login is not configured for the
host, because otherwise the application is unreachable on a bare localhost.

A person's picture is carried through from the Go Loose identity and rendered in
the account menu and on the profile page, with their initials as the fallback.
Two things make that fallback necessary rather than decorative: Go Loose retires a
picture key when a picture is replaced, so a link cached in a browser can be dead,
and most people have not uploaded one. The URL is deliberately not persisted
locally, since a stored key would keep failing after the picture changed.

The account menu is a disclosure rather than a hover menu: a real button with
aria-expanded, Escape and outside clicks closing it, and focus returning to the
trigger. It is not an ARIA menu, because its actions are a link and a button and
menuitem roles would strip the link semantics from one of them for no gain.

The account URL of the Go Loose identity is resolved on each sign-in and is read
from the live identity provider every time, which is also what makes it correct
after a picture change.

Depends on the Go Loose revision that serves avatar_url through
/connect/userinfo, so the picture URL reaches this application at all.
2026-10-05 21:50:06 +02:00

112 lines
3.3 KiB
Go

package config
import (
"fmt"
"os"
"strconv"
"strings"
"time"
)
type Config struct {
Address string
DatabaseURL string
JWTSecret string
TokenTTL time.Duration
MaxUploadMB int64
FrontendURL string
RabbitMQURL string
GoLoose GoLooseConfig
}
type GoLooseConfig struct {
AuthDomain string
AppDomain string
CAFile string
Tenants map[string]GoLooseTenant
}
type GoLooseTenant struct {
ClientID string
ClientSecret string
}
const (
// DefaultAuthDomain is the Go Loose identity domain used for local
// development. Production signs in through DefaultProdAuthDomain.
DefaultAuthDomain = "auth-dev.urpi.be"
// DefaultProdAuthDomain is the Go Loose identity domain used in production.
DefaultProdAuthDomain = "auth.urpi.be"
// DefaultAppDomain is the public application domain used for local
// development, matching deploy/helm/go-guess/values-dev.yaml.
DefaultAppDomain = "guess-dev.urpi.be"
// DefaultProdAppDomain is the public application domain used in production,
// matching deploy/helm/go-guess/values.yaml.
DefaultProdAppDomain = "guess.urpi.be"
)
// GoLooseCredentialEnv returns the environment variable names holding the Go
// Loose client credentials of a tenant.
func GoLooseCredentialEnv(slug string) (idEnv, secretEnv string) {
prefix := "GO_LOOSE_" + strings.ToUpper(slug)
return prefix + "_CLIENT_ID", prefix + "_CLIENT_SECRET"
}
func Load() (Config, error) {
ttl, err := time.ParseDuration(env("TOKEN_TTL", "8h"))
if err != nil {
return Config{}, fmt.Errorf("parse TOKEN_TTL: %w", err)
}
maxUploadMB, err := strconv.ParseInt(env("MAX_UPLOAD_MB", "10"), 10, 64)
if err != nil || maxUploadMB < 1 {
return Config{}, fmt.Errorf("MAX_UPLOAD_MB must be a positive integer")
}
cfg := Config{
Address: env("ADDRESS", ":8080"),
DatabaseURL: env("DATABASE_URL", "postgres://go_guess:go_guess@localhost:5432/?sslmode=disable"),
JWTSecret: os.Getenv("JWT_SECRET"),
TokenTTL: ttl,
MaxUploadMB: maxUploadMB,
FrontendURL: env("FRONTEND_URL", "http://localhost:5173"),
RabbitMQURL: env("RABBITMQ_URL", "amqp://guest:guest@localhost:5672/"),
GoLoose: loadGoLoose(),
}
if len(cfg.JWTSecret) < 32 {
return Config{}, fmt.Errorf("JWT_SECRET must contain at least 32 characters")
}
return cfg, nil
}
// loadGoLoose reads the Go Loose browser login configuration. Both domains are
// single host suffixes: a tenant named "nmbs" signs in through
// https://nmbs.<AuthDomain> and is served from https://nmbs.<AppDomain>.
//
// The defaults are the development domains, matching the rest of the local
// defaults in Load. Production deployments set GO_LOOSE_AUTH_DOMAIN and
// GO_LOOSE_APP_DOMAIN explicitly (see deploy/helm/go-guess/values.yaml).
func loadGoLoose() GoLooseConfig {
cfg := GoLooseConfig{
AuthDomain: env("GO_LOOSE_AUTH_DOMAIN", DefaultAuthDomain),
AppDomain: env("GO_LOOSE_APP_DOMAIN", DefaultAppDomain),
CAFile: os.Getenv("GO_LOOSE_CA_FILE"),
Tenants: map[string]GoLooseTenant{},
}
add := func(slug string) {
idEnv, secretEnv := GoLooseCredentialEnv(slug)
id, secret := os.Getenv(idEnv), os.Getenv(secretEnv)
if id == "" || secret == "" {
return
}
cfg.Tenants[slug] = GoLooseTenant{ClientID: id, ClientSecret: secret}
}
add("nmbs")
add("ypto")
return cfg
}
func env(key, fallback string) string {
if value := os.Getenv(key); value != "" {
return value
}
return fallback
}