Feature: Add URL redirect (/view/latest) to view latest message in web UI (#166)

server/handlers/messages.go

@@ -3,6 +3,7 @@ package handlers
 import (
 	"fmt"
 	"net/http"
+	"net/url"
 	"regexp"
 	"strings"
 
@@ -11,6 +12,27 @@ import (
 	"github.com/gorilla/mux"
 )
 
+// RedirectToLatestMessage (method: GET) redirects the web UI to the latest message
+func RedirectToLatestMessage(w http.ResponseWriter, r *http.Request) {
+	messages, err := storage.List(0, 1)
+	if err != nil {
+		httpError(w, err.Error())
+		return
+	}
+
+	uri := config.Webroot
+
+	if len(messages) == 1 {
+		uri, err = url.JoinPath(uri, "/view/"+messages[0].ID)
+		if err != nil {
+			httpError(w, err.Error())
+			return
+		}
+	}
+
+	http.Redirect(w, r, uri, 302)
+}
+
 // GetMessageHTML (method: GET) returns a rendered version of a message's HTML part
 func GetMessageHTML(w http.ResponseWriter, r *http.Request) {
 	// swagger:route GET /view/{ID}.html testing GetMessageHTML

server/server.go

@@ -68,6 +68,9 @@ func Listen() {
 		r.HandleFunc(redirect, middleWareFunc(addSlashToWebroot)).Methods("GET")
 	}
 
+	// UI shortcut
+	r.HandleFunc(config.Webroot+"view/latest", handlers.RedirectToLatestMessage).Methods("GET")
+
 	// frontend testing
 	r.HandleFunc(config.Webroot+"view/{id}.html", handlers.GetMessageHTML).Methods("GET")
 	r.HandleFunc(config.Webroot+"view/{id}.txt", handlers.GetMessageText).Methods("GET")