/
auth.go
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/
auth.go
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package auth
import (
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net/url"
"os"
"bitbucket.org/backend/core/entities"
"bitbucket.org/backend/core/facebook/internal"
"bitbucket.org/backend/core/logger"
"bitbucket.org/backend/core/server"
platform "bitbucket.org/backend/core/storage/facebook"
"bitbucket.org/backend/core/storage/user"
"github.com/aws/aws-sdk-go/aws/session"
)
// Auth methods for facebook
type Auth interface {
AuthUser(code, userID string) (*entities.Facebook, error)
GetUser(userID string) (*entities.Facebook, bool, error)
}
type facebook struct {
userStore user.Storage
platformStore platform.Storage
client server.Client
}
// New auth facebook interface
func New(sess *session.Session, config ...func(*facebook)) Auth {
f := &facebook{
platformStore: platform.NewFacebook(sess),
client: server.New(),
}
for _, fn := range config {
fn(f)
}
return f
}
var (
// ErrorNilCode the code to exchange for a facebook access token is nil
ErrorNilCode = errors.New("The code to exchange for a facebook access token is nil")
// ErrorNilUser the request doesn't provide the user id
ErrorNilUser = errors.New("Nil user id")
)
type debugAccessToken struct {
AppID string `json:"app_id"`
Type string `json:"type"`
Application string `json:"application"`
Valid bool `json:"is_valid"`
ExpiresAt int `json:"expires_at"`
IssuedAt int `json:"issued_at"`
Metadata struct {
Sso string `json:"sso"`
} `json:"metadata"`
Scopes []string `json:"scopes"`
UserID string `json:"user_id"`
}
func (f *facebook) AuthUser(code, userID string) (*entities.Facebook, error) {
if userID == "" {
return nil, &logger.Error{
Level: "Warning",
Err: ErrorNilUser,
}
}
if code == "" {
return nil, &logger.Error{
Level: "Warning",
Err: ErrorNilCode,
}
}
var (
e *entities.Facebook
)
token, err := f.exchangeCode(code)
if err != nil {
return nil, err
}
debug, err := f.debugToken(token)
if err != nil {
return nil, err
}
pages, err := f.getPages(token, debug.UserID)
if err != nil {
return nil, err
}
adAccounts, err := f.getAdAccounts(token, debug.UserID)
if err != nil {
return nil, err
}
e = &entities.Facebook{
ID: debug.UserID,
Pages: pages,
AdAccounts: adAccounts,
AccessToken: token,
}
err = f.platformStore.StoreFacebook(userID, e)
if err != nil {
return nil, &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to store facebook information for user",
}
}
return e, nil
}
func (f *facebook) exchangeCode(code string) (string, error) {
var (
result = struct {
Token string `json:"access_token"`
Error *internal.FacebookError `json:"error"`
}{}
)
uV := url.Values{}
uV.Add("client_id", os.Getenv("clientID"))
uV.Add("redirect_uri", os.Getenv("redirectURL"))
uV.Add("client_secret", os.Getenv("clientSecret"))
uV.Add("code", code)
u := internal.SetURL("oauth/access_token", uV)
resp, err := f.client.Get(u)
if err != nil {
return "", &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to perform get request to exchange authentication code",
}
}
defer resp.Body.Close()
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to read response body during code exchange for facebook authentication",
}
}
err = json.Unmarshal(b, &result)
if err != nil {
return "", &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to unmarshal result during code exchange for facebook authentication",
}
}
if result.Error != nil {
return "", &logger.Error{
Level: "Warning",
Err: result.Error,
Message: "Response to the code exchange for a facebook authentication contained an error",
}
}
return result.Token, nil
}
func (f *facebook) getPages(t, id string) ([]entities.Page, error) {
var (
result = struct {
Pages []entities.Page `json:"data"`
Error *internal.FacebookError `json:"error"`
}{}
)
uV := url.Values{}
uV.Add("access_token", t)
uV.Add("fields", "id,name,category,access_token")
u := internal.SetURL(fmt.Sprintf("%s/accounts", id), uV)
resp, err := f.client.Get(u)
if err != nil {
return nil, &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to perform get request to retrieve user facebook pages",
}
}
defer resp.Body.Close()
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to read response body during the retrieval of facebook pages",
}
}
err = json.Unmarshal(b, &result)
if err != nil {
return nil, &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to unmarshal result during the retrieval of facebook pages",
}
}
if result.Error != nil {
return nil, &logger.Error{
Level: "Error",
Err: result.Error,
Message: "Response to retrieve facebook pages contained an error",
}
}
err = f.getInstagram(result.Pages)
if err != nil {
return nil, err
}
return result.Pages, nil
}
func (f *facebook) getInstagram(pages []entities.Page) error {
type result struct {
Instagram []entities.Instagram `json:"data"`
Error *internal.FacebookError `json:"error"`
}
for i, p := range pages {
re := result{}
uV := url.Values{}
uV.Add("access_token", p.AccessToken)
uV.Add("fields", "id,username")
u := internal.SetURL(fmt.Sprintf("%s/instagram_accounts", p.ID), uV)
resp, err := f.client.Get(u)
if err != nil {
return &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to make get request during the retrieval of a page instagram",
}
}
defer resp.Body.Close()
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to read response body during the retrieval of a page instagram",
}
}
err = json.Unmarshal(b, &re)
if err != nil {
return &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to unmarshal result during the retrieval of a page instagram",
}
}
if re.Error != nil {
return &logger.Error{
Level: "Error",
Err: re.Error,
Message: "Response to retrieve a page instagram contained an error",
}
}
pages[i].Instagram = re.Instagram
}
return nil
}
func (f *facebook) getAdAccounts(t, id string) ([]entities.AdAccount, error) {
var (
result = struct {
AdAccounts []entities.AdAccount `json:"data"`
Error *internal.FacebookError `json:"error"`
}{}
)
uV := url.Values{}
uV.Add("access_token", t)
uV.Add("fields", "id,account_id,name,currency")
u := internal.SetURL(fmt.Sprintf("%s/adaccounts", id), uV)
resp, err := f.client.Get(u)
if err != nil {
return nil, &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to perform get request to retrieve user ad accounts",
}
}
defer resp.Body.Close()
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to read response body during the retrieval of user ad accounts",
}
}
err = json.Unmarshal(b, &result)
if err != nil {
return nil, &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to unmarshal result during the retrieval of user ad accounts",
}
}
if result.Error != nil {
return nil, &logger.Error{
Level: "Error",
Err: result.Error,
Message: "Response to retrieve a user's ad accounts contained an error",
}
}
return result.AdAccounts, nil
}
func (f *facebook) debugToken(t string) (*debugAccessToken, error) {
var (
result = struct {
DebugAccessToken *debugAccessToken `json:"data"`
Error *internal.FacebookError `json:"error"`
}{}
)
uV := url.Values{}
uV.Add("input_token", t)
uV.Add("access_token", os.Getenv("appToken"))
u := internal.SetURL("debug_token", uV)
resp, err := f.client.Get(u)
if err != nil {
return nil, &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to make get request during the debugging of a facebook access token",
}
}
defer resp.Body.Close()
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to read response body during the debugging of a facebook access token",
}
}
err = json.Unmarshal(b, &result)
if err != nil {
return nil, &logger.Error{
Level: "Panic",
Err: err,
Message: "Unable to unmarshal result during the debugging of a facebook access token",
}
}
if result.Error != nil {
return nil, &logger.Error{
Level: "Error",
Err: result.Error,
Message: "Response to debug a user's token contained an error",
}
}
return result.DebugAccessToken, nil
}
func (f *facebook) GetUser(userID string) (*entities.Facebook, bool, error) {
if userID == "" {
return nil, false, &logger.Error{
Level: "Warning",
Err: ErrorNilUser,
}
}
e, err := f.platformStore.GetFacebook(userID)
if err != nil {
return nil, false, &logger.Error{
Level: "Panic",
Message: "Unable to Get Facebook Data for user",
Err: err,
}
}
if e.AccessToken == "" {
return nil, false, nil
}
debug, err := f.debugToken(e.AccessToken)
if err != nil {
return nil, false, err
}
return e, debug.Valid, nil
}