Add a validation for the create form.

src/main/blog/handlers.cljs

@@ -312,6 +312,54 @@
             (res/status 500)
             (res/send (ex-message err))))))))
 
+(defn htmx-create-title-validation-handler-factory
+  [client]
+  (fn [req res]
+    (let [channel (chan)
+          title   (.-title (.-body req))
+          content (.-content (.-body req))]
+      (go
+        (try
+          (let [error (cond
+                        (= (count title) 0)
+                        "Tittle must be nonempty!!!"
+
+                        :else
+                        nil)]
+            (res/status 200)
+            (.render res "create_title_validation"
+                     (-> {:error error
+                          :title title
+                          :layout false}
+                         (clj->js))))
+          (catch js/Error err
+            (res/status 500)
+            (res/send (ex-message err))))))))
+
+(defn htmx-create-content-validation-handler-factory
+  []
+  (fn [req res]
+    (let [channel (chan)
+          title   (.-title (.-body req))
+          content (.-content (.-body req))]
+      (go
+        (try
+          (let [error (cond
+                        (= (count content) 0)
+                        "Content must be nonempty!!!"
+
+                        :else
+                        nil)]
+            (res/status 200)
+            (.render res "create_content_validation"
+                     (-> {:error error
+                          :content content
+                          :layout false}
+                         (clj->js))))
+          (catch js/Error err
+            (res/status 500)
+            (res/send (ex-message err))))))))
+
 (defn htmx-create-article-handler-factory
   [client]
   (fn [req res]

src/main/blog/server.cljs

@@ -111,6 +111,20 @@
   (. app post "/htmx/search/articles/"
      (handlers/htmx-search-articles-handler-factory client))
 
+  (. app post "/htmx/validation/create-title/"
+     handlers/is-user-authorized
+     (handlers/htmx-create-title-validation-handler-factory client))
+
+  (. app use "/htmx/validation/create-title/"
+     (handlers/user-not-authorized-factory))
+
+  (. app post "/htmx/validation/create-content/"
+     handlers/is-user-authorized
+     (handlers/htmx-create-content-validation-handler-factory))
+
+  (. app use "/htmx/validation/create-content/"
+     (handlers/user-not-authorized-factory))
+
   (. app post "/htmx/articles/"
      handlers/is-user-authorized
      (handlers/htmx-create-article-handler-factory client))