polycule-connect/polyculeconnect/internal/client/client.go

package client

import (
	"context"
	"fmt"
	"log/slog"

	"git.faercol.me/faercol/polyculeconnect/polyculeconnect/logger"
	"github.com/google/uuid"
	"github.com/zitadel/oidc/v3/pkg/client/rp"
	"go.uber.org/zap"
	"go.uber.org/zap/exp/zapslog"
)

type BackendOIDCConfig struct {
	Issuer       string
	ClientID     string
	ClientSecret string
	RedirectURI  string
}

type Backend struct {
	ID     uuid.UUID
	Name   string
	Config BackendOIDCConfig
}

// OIDCClient is an OIDC client which is the client used to access a registered backend
type OIDCClient struct {
	backend *Backend

	provider rp.RelyingParty
	ctx      context.Context
	l        *zap.SugaredLogger
}

func New(ctx context.Context, conf *Backend, l *zap.SugaredLogger) (*OIDCClient, error) {
	options := []rp.Option{
		rp.WithLogger(slog.New(zapslog.NewHandler(logger.L.Desugar().Core(), nil))),
	}
	pr, err := rp.NewRelyingPartyOIDC(ctx, conf.Config.Issuer, conf.Config.ClientID, conf.Config.ClientSecret, conf.Config.RedirectURI, []string{}, options...)
	if err != nil {
		return nil, fmt.Errorf("failed to init relying party provider: %w", err)
	}

	return &OIDCClient{ctx: ctx, backend: conf, provider: pr, l: l}, nil
}

func (c *OIDCClient) AuthorizationEndpoint() string {
	url := rp.AuthURL(uuid.NewString(), c.provider)
	return url
}