gitlab.go

package gitlab

import (
	"bytes"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"log"
	"net/http"
	"strconv"

	"github.com/nsheridan/cashier/server/config"
	"github.com/nsheridan/cashier/server/metrics"

	"golang.org/x/oauth2"
)

const (
	name = "gitlab"
)

// Config is an implementation of `auth.Provider` for authenticating using a
// Gitlab account.
type Config struct {
	config    *oauth2.Config
	group     string
	whitelist map[string]bool
	allusers  bool
	apiurl    string
	log       bool
}

// Note on Gitlab REST API calls.  We don't parse errors because it's
// kind of a pain:
// https://gitlab.com/help/api/README.md#data-validation-and-error-reporting
// The two v4 api calls used are /user and /groups/:group/members/:uid
// https://gitlab.com/help/api/users.md#for-normal-users-1
// https://gitlab.com/help/api/members.md#get-a-member-of-a-group-or-project
type serviceUser struct {
	ID       int    `json:"id"`
	Username string `json:"username"`
	Email    string `json:"email"`
}

type serviceGroupMember struct {
	ID          int    `json:"id"`
	State       string `json:"state"`
	AccessLevel int    `json:"access_level"`
}

func (c *Config) logMsg(message string) {
	if c.log {
		log.Print(message)
	}
}

// A new oauth2 http client.
func (c *Config) newClient(token *oauth2.Token) *http.Client {
	return c.config.Client(oauth2.NoContext, token)
}

// Gets info on the current user.
func (c *Config) getUser(token *oauth2.Token) *serviceUser {
	client := c.newClient(token)
	url := c.apiurl + "user"
	resp, err := client.Get(url)
	if err != nil {
		return nil
	}