Aded show only the maintained oAuth providers in the frontend. Fix #41

handlers/auth.go

@@ -17,9 +17,19 @@ import (
 func (h *Handler) initOAuth() {
 	h.engine.Use(sessions.Sessions("backend", sessions.NewCookieStore(util.GetPrivateKey())))
 
+	h.providers = []string{}
+	if viper.GetString("Google.ClientSecret") != "" {
 		auth.WithAdapterWrapper(auth.NewGoogleAdapter(viper.GetString("Google.ClientID"), viper.GetString("Google.ClientSecret"), viper.GetString("base_url")), h.engine.Group("/api/v1/auth/google"))
+		h.providers = append(h.providers, "google")
+	}
+	if viper.GetString("GitHub.ClientSecret") != "" {
 		auth.WithAdapterWrapper(auth.NewGithubAdapter(viper.GetString("GitHub.ClientID"), viper.GetString("GitHub.ClientSecret"), viper.GetString("base_url")), h.engine.Group("/api/v1/auth/github"))
+		h.providers = append(h.providers, "github")
+	}
+	if viper.GetString("Microsoft.ClientSecret") != "" {
 		auth.WithAdapterWrapper(auth.NewMicrosoftAdapter(viper.GetString("Microsoft.ClientID"), viper.GetString("Microsoft.ClientSecret"), viper.GetString("base_url")), h.engine.Group("/api/v1/auth/microsoft"))
+		h.providers = append(h.providers, "microsoft")
+	}
 
 	h.engine.POST("/api/v1/check", h.handleAuthCheck)
 }

handlers/handlers.go

@@ -22,6 +22,7 @@ import (
 type Handler struct {
 	store     store.Store
 	engine    *gin.Engine
+	providers []string
 }
 
 // DoNotPrivateKeyChecking is used for testing
@@ -71,6 +72,8 @@ func (h *Handler) setHandlers() error {
 	protected.POST("/create", h.handleCreate)
 	protected.POST("/lookup", h.handleLookup)
 
+	h.engine.GET("/api/v1/info", h.handleInfo)
+
 	h.engine.NoRoute(h.handleAccess, gin.WrapH(http.FileServer(FS(false))))
 	return nil
 }

handlers/public.go

@@ -86,6 +86,10 @@ func (h *Handler) handleCreate(c *gin.Context) {
 	c.JSON(http.StatusOK, data)
 }
 
+func (h *Handler) handleInfo(c *gin.Context) {
+	c.JSON(http.StatusOK, gin.H{"providers": h.providers})
+}
+
 func (h *Handler) getSchemaAndHost(c *gin.Context) string {
 	protocol := "http"
 	if c.Request.TLS != nil {

static/src/index.js

@@ -14,7 +14,8 @@ export default class BaseComponent extends Component {
         open: true,
         userData: {},
         authorized: false,
-        activeItem: ""
+        activeItem: "",
+        providers: []
     }
 
     onOAuthClose() {
@@ -25,6 +26,11 @@ export default class BaseComponent extends Component {
 
     componentWillMount() {
         this.checkAuth()
+        this.loadInfo()
+    }
+
+    loadInfo = () => {
+        fetch('/api/v1/info').then(d => d.json()).then(d => this.setState({ providers: d.providers }))
     }
 
     checkAuth = () => {
@@ -61,12 +67,17 @@ export default class BaseComponent extends Component {
     }
     onOAuthClick = provider => {
         window.addEventListener('message', this.onOAuthCallback, false);
+        var url = `${window.location.origin}/api/v1/auth/${provider}/login`;
+        if (!this._oAuthPopup) {
             // Open the oAuth window that is it centered in the middle of the screen
             var wwidth = 400,
                 wHeight = 500;
             var wLeft = (window.screen.width / 2) - (wwidth / 2);
             var wTop = (window.screen.height / 2) - (wHeight / 2);
-        window.open(`/api/v1/auth/${provider}/login`, '', `width=${wwidth}, height=${wHeight}, top=${wTop}, left=${wLeft}`)
+            this._oAuthPopup = window.open(url, '', `width=${wwidth}, height=${wHeight}, top=${wTop}, left=${wLeft}`)
+        } else {
+            this._oAuthPopup.location = url;
+        }
     }
 
     handleLogout = () => {
@@ -75,7 +86,7 @@ export default class BaseComponent extends Component {
     }
 
     render() {
-        const { open, authorized, activeItem, userData } = this.state
+        const { open, authorized, activeItem, userData, providers } = this.state
         if (!authorized) {
             return (
                 <Modal size='tiny' open={open} onClose={this.onOAuthClose}>
@@ -85,17 +96,24 @@ export default class BaseComponent extends Component {
                     <Modal.Content>
                         <p>The following authentication services are currently available:</p>
                         <div className='ui center aligned segment'>
+                            {providers.length == 0 && <p>There are currently no correct oAuth credential maintained.</p>}
+                            {providers.indexOf("microsoft") != -1 && <div>
                                 <Button className='ui google plus button' onClick={this.onOAuthClick.bind(this, "google")}>
                                     <Icon name='google' /> Login with Google
                                 </Button>
+                            </div>}
+                            {providers.indexOf("microsoft") != -1 && <div>
                                 <div className="ui divider"></div>
                                 <Button style={{ backgroundColor: "#333", color: "white" }} onClick={this.onOAuthClick.bind(this, "github")}>
                                     <Icon name='github' /> Login with GitHub
                                     </Button>
+                            </div>}
+                            {providers.indexOf("microsoft") != -1 && <div>
                                 <div className="ui divider"></div>
                                 <Button style={{ backgroundColor: "#0067b8", color: "white" }} onClick={this.onOAuthClick.bind(this, "microsoft")}>
                                     <Icon name='windows' /> Login with Microsoft
                                 </Button>
+                            </div>}
                         </div>
                     </Modal.Content>
                 </Modal>