maintain state of title, description and tags when switching post type

app/community/routes.py

@@ -735,7 +735,12 @@ def add_post(actor, type):
             if not community.local_only:
                 federate_post(community, post)
 
-        return redirect(f"/post/{post.id}")
+        resp = make_response(redirect(f"/post/{post.id}"))
+        # remove cookies used to maintain state when switching post type
+        resp.delete_cookie('post_title')
+        resp.delete_cookie('post_description')
+        resp.delete_cookie('post_tags')
+        return resp
     else: # GET
         form.communities.data = community.id
         form.notify_author.data = True

app/static/js/scripts.js

@@ -34,6 +34,7 @@ document.addEventListener("DOMContentLoaded", function () {
     setupLightboxTeaser();
     setupLightboxPostBody();
     setupPostTeaserHandler();
+    setupPostTypeSwitcher();
 });
 
 function setupPostTeaserHandler() {
@@ -47,6 +48,26 @@ function setupPostTeaserHandler() {
     });
 }
 
+function setupPostTypeSwitcher() {
+    document.querySelectorAll('#type_of_post a').forEach(a => {
+        a.onclick = function() {
+            setCookie('post_title', document.getElementById('title').value, 0.1);
+            setCookie('post_description', document.getElementById('body').value, 0.1);
+            setCookie('post_tags', document.getElementById('tags').value, 0.1);
+        };
+    });
+
+    var typeSwitcher = document.getElementById('type_of_post');
+    var title = document.getElementById('title');
+    var body = document.getElementById('body');
+    var tags = document.getElementById('tags');
+    if(typeSwitcher && title && body && tags) {
+        title.value = getCookie('post_title');
+        body.value = getCookie('post_description');
+        tags.value = getCookie('post_tags');
+    }
+}
+
 function setupYouTubeLazyLoad() {
     const lazyVideos = document.querySelectorAll(".video-wrapper");
 
@@ -799,7 +820,7 @@ function getCookie(name) {
         var cookie = cookies[i].trim();
 
         if (cookie.indexOf(name + '=') === 0) {
-            return cookie.substring(name.length + 1);
+            return decodeURIComponent(cookie.substring(name.length + 1));
         }
     }