From 063abcf9d17fedc253d912040e0190955f9b865e Mon Sep 17 00:00:00 2001
From: Meutel <meutel@meutel.net>
Date: Sun, 8 Sep 2019 10:41:10 +0200
Subject: [PATCH] WIP: auth gitea

---
 bouquins/auth.go   |  9 +++++
 bouquins/gitea.go  | 88 ++++++++++++++++++++++++++++++++++++++++++++++
 bouquins/github.go |  9 -----
 3 files changed, 97 insertions(+), 9 deletions(-)
 create mode 100644 bouquins/gitea.go

diff --git a/bouquins/auth.go b/bouquins/auth.go
index 59af111..fed1bb0 100644
--- a/bouquins/auth.go
+++ b/bouquins/auth.go
@@ -45,6 +45,15 @@ type OAuth2Provider interface {
 	Icon() string
 }
 
+func findProvider(name string) OAuth2Provider {
+	for _, p := range Providers {
+		if p.Name() == name {
+			return p
+		}
+	}
+	return nil
+}
+
 // generates a 16 characters long random string
 func securedRandString() string {
 	b := make([]byte, 16)
diff --git a/bouquins/gitea.go b/bouquins/gitea.go
new file mode 100644
index 0000000..8bc3ad0
--- /dev/null
+++ b/bouquins/gitea.go
@@ -0,0 +1,88 @@
+package bouquins
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+
+	"golang.org/x/oauth2"
+)
+
+// GithubProvider implements OAuth2 client with github.com
+type GiteaProvider string
+
+type giteaProfile struct {
+	AvatarURL string `json:"avatar_url"`
+	Created   string `json:"created"`
+	Email     string `json:"email"`
+	FullName  string `json:"full_name"`
+	ID        int64  `json:"id"`
+	IsAdmin   bool   `json:"is_admin"`
+	Language  string `json:"language"`
+	LastLogin string `json:"last_login"`
+	Login     string `json:"login"`
+}
+
+func init() {
+	Providers = append(Providers, GiteaProvider("gitea"))
+}
+
+// Name returns name of provider
+func (p GiteaProvider) Name() string {
+	return string(p)
+}
+
+// Label returns label of provider
+func (p GiteaProvider) Label() string {
+	return "Gitea"
+}
+
+// Icon returns icon CSS class for provider
+func (p GiteaProvider) Icon() string {
+	return "giteaicon" // TODO
+}
+
+// Config returns OAuth configuration for this provider
+func (p GiteaProvider) Config(conf *Conf) *oauth2.Config {
+	for _, c := range conf.ProvidersConf {
+		if c.Name == p.Name() {
+			return &oauth2.Config{
+				ClientID:     c.ClientID,
+				ClientSecret: c.ClientSecret,
+				RedirectURL:  "http://localhost:9000/callback", // TODO
+				Endpoint: oauth2.Endpoint{
+					"https://git.meutel.net/login/oauth/authorize",    // TODO
+					"https://git.meutel.net/login/oauth/access_token", // TODO
+					oauth2.AuthStyleAutoDetect,
+				},
+			}
+		}
+	}
+	return nil
+}
+
+// GetUser returns github primary email
+func (p GiteaProvider) GetUser(token *oauth2.Token) (string, error) {
+	apiReq, err := http.NewRequest("GET", "https://git.meutel.net/api/v1/user", nil) // TODO
+	apiReq.Header.Add("Accept", "application/json")
+	apiReq.Header.Add("Authorization", "token "+token.AccessToken)
+	client := &http.Client{}
+	response, err := client.Do(apiReq)
+	defer response.Body.Close()
+	if err != nil {
+		log.Println("Auth error", err)
+		return "", fmt.Errorf("Authentification error")
+	}
+
+	dec := json.NewDecoder(response.Body)
+	var profile giteaProfile
+	err = dec.Decode(&profile)
+	if err != nil {
+		log.Printf("Error reading %s API response %v", p.Name(), err)
+		return "", fmt.Errorf("Error reading %s API response", p.Name())
+	}
+	userEmail := profile.Email
+	log.Println("User email:", userEmail)
+	return userEmail, nil
+}
diff --git a/bouquins/github.go b/bouquins/github.go
index 9355881..64129c1 100644
--- a/bouquins/github.go
+++ b/bouquins/github.go
@@ -83,12 +83,3 @@ func (p GithubProvider) GetUser(token *oauth2.Token) (string, error) {
 	log.Println("User email:", userEmail)
 	return userEmail, nil
 }
-
-func findProvider(name string) OAuth2Provider {
-	for _, p := range Providers {
-		if p.Name() == name {
-			return p
-		}
-	}
-	return nil
-}