New parameter to display a message at the top of the screen

auth.go

@@ -13,6 +13,7 @@ import (
 var LocalAuthFunc = checkAuthKrb5
 var allowLocalAuth bool
 var localAuthUsers arrayFlags
+var mainBanner string
 
 type loginForm struct {
 	Login    string `json:"username"`
@@ -47,16 +48,18 @@ func declareAPIAdminAuthRoutes(router *gin.RouterGroup) {
 		session.Update()
 
 		c.JSON(http.StatusOK, authToken{
-			User:         newuser,
-			CurrentPromo: currentPromo,
+			User:          newuser,
+			CurrentPromo:  currentPromo,
+			MessageBanner: mainBanner,
 		})
 	})
 }
 
 type authToken struct {
 	*User
-	CurrentPromo uint     `json:"current_promo"`
-	Groups       []string `json:"groups"`
+	CurrentPromo  uint     `json:"current_promo"`
+	Groups        []string `json:"groups"`
+	MessageBanner string   `json:"banner,omitempty"`
 }
 
 func validateAuthToken(c *gin.Context) {
@@ -64,7 +67,7 @@ func validateAuthToken(c *gin.Context) {
 		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"errmsg": "Not connected"})
 		return
 	} else {
-		t := authToken{User: u.(*User), CurrentPromo: currentPromo}
+		t := authToken{User: u.(*User), CurrentPromo: currentPromo, MessageBanner: mainBanner}
 
 		t.Groups = strings.Split(strings.TrimFunc(t.User.Groups, func(r rune) bool { return !unicode.IsLetter(r) }), ",")
 
@@ -157,6 +160,6 @@ func dummyAuth(c *gin.Context) {
 		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"errmsg": err.Error()})
 		return
 	} else {
-		c.JSON(http.StatusOK, authToken{User: usr, CurrentPromo: currentPromo})
+		c.JSON(http.StatusOK, authToken{User: usr, CurrentPromo: currentPromo, MessageBanner: mainBanner})
 	}
 }

main.go

@@ -58,6 +58,7 @@ func main() {
 	var bind = flag.String("bind", ":8081", "Bind port/socket")
 	var dsn = flag.String("dsn", DSNGenerator(), "DSN to connect to the MySQL server")
 	var dummyauth = flag.Bool("dummy-auth", false, "If set, allow any authentication credentials")
+	flag.StringVar(&mainBanner, "banner-message", mainBanner, "Display a message to connected user, at the top of the screen")
 	flag.StringVar(&DevProxy, "dev", DevProxy, "Proxify traffic to this host for static assets")
 	flag.StringVar(&baseURL, "baseurl", baseURL, "URL prepended to each URL")
 	flag.UintVar(&currentPromo, "current-promo", currentPromo, "Year of the current promotion")

ui/src/routes/+layout.svelte

@@ -29,6 +29,11 @@
     <title>ЕРІТА: MCQ and others courses related stuff</title>
 </svelte:head>
 
+{#if $user && $user.banner}
+    <div class="bg-danger text-white text-center py-1 fw-bolder">
+        {$user.banner}
+    </div>
+{/if}
 {#if isSRS}
     <div style="position: fixed; bottom: 20px; right: 20px; z-index: -1; background-image: url('img/srstamps.png'); background-size: cover; width: 125px; height: 125px;"></div>
 {/if}