enable mod_userdir

diff of `rails routes`:

12,13d11
<                              GET      /newest/:user(.:format)                        home#newest_by_user
<                              GET      /newest/:user/page/:page(.:format)             home#newest_by_user
32d29
<                 user_threads GET      /threads/:user(.:format)                       comments#user_threads
120,122c117,132
<                            u GET      /u(.:format)                                   users#tree
<                         user GET      /u/:username(.:format)                         users#show
<                user_standing GET      /u/:username/standing(.:format)                users#standing
---
>                   users_tree GET      /users(.:format)                               users#tree
>                         user GET      /~:username(.:format)                          users#show
>                user_standing GET      /~:username/standing(.:format)                 users#standing
>                              GET      /~:user/stories(/page/:page)(.:format)         home#newest_by_user
>                 user_threads GET      /~:user/threads(.:format)                      comments#user_threads
>                     user_ban POST     /~:username/ban(.:format)                      users#ban
>                   user_unban POST     /~:username/unban(.:format)                    users#unban
>          user_disable_invite POST     /~:username/disable_invitation(.:format)       users#disable_invitation
>           user_enable_invite POST     /~:username/enable_invitation(.:format)        users#enable_invitation
>                            u GET      /u(.:format)                                   redirect(302, /users)
>                              GET      /u/:username(.:format)                         redirect(302, /~%{username})
>                              GET      /@:username(.:format)                          redirect(302, /~%{username})
>                              GET      /u/:username/standing(.:format)                redirect(302, ~%{username}/standing)
>                              GET      /newest/:user(.:format)                        redirect(302, ~%{user}/stories)
>                              GET      /newest/:user(/page/:page)(.:format)           redirect(302, ~%{user}/stories/page/%{page})
>                              GET      /threads/:user(.:format)                       redirect(302, ~%{user}/threads)
125,128d134
<                     user_ban POST     /users/:username/ban(.:format)                 users#ban
<                   user_unban POST     /users/:username/unban(.:format)               users#unban
<          user_disable_invite POST     /users/:username/disable_invitation(.:format)  users#disable_invitation
<           user_enable_invite POST     /users/:username/enable_invitation(.:format)   users#enable_invitation

app/assets/stylesheets/application.css.erb

@@ -1246,7 +1246,7 @@ ul.user_tree {
 	color: var(--color-fg-contrast-4-5);
 }
 
-/* /u/:username/standing */
+/* /~:username/standing */
 /* https://codepen.io/sosuke/pen/Pjoqqp */
 .unwarned {
 	filter: invert(36%) sepia(52%) saturate(0%) hue-rotate(292deg) brightness(96%) contrast(85%);

app/controllers/keybase_proofs_controller.rb

@@ -44,8 +44,8 @@ class KeybaseProofsController < ApplicationController
     @contacts = ["admin@#{Keybase.DOMAIN}"]
     @prefill_url = "#{new_keybase_proof_url}?kb_username=%{kb_username}&" \
       "kb_signature=%{sig_hash}&kb_ua=%{kb_ua}&username=%{username}"
-    @profile_url = "#{u_url}/%{username}"
+    @profile_url = "/~%{username}"
-    @check_url = "#{u_url}/%{username}.json"
+    @check_url = "/~%{username}.json"
     @logo_black = "https://lobste.rs/small-black-logo.svg"
     @logo_full = "https://lobste.rs/full-color.logo.svg"
     @user_re = User.username_regex_s[1...-1]

app/helpers/users_helper.rb

@@ -30,6 +30,35 @@ module UsersHelper
     end
   end
 
+  def styled_user_link user, content = nil, css_classes = []
+    if content.is_a?(Story) && content.user_is_author?
+      css_classes.push 'user_is_author'
+    end
+    if content.is_a?(Comment) && content.story &&
+       content.story.user_is_author? && content.story.user_id == user.id
+      css_classes.push 'user_is_author'
+    end
+
+    if !user.is_active?
+      css_classes.push 'inactive_user'
+    end
+    if user.is_new?
+      css_classes.push 'new_user'
+    end
+
+    link_to(user.username, user, class: css_classes)
+  end
+
+  def user_karma(user)
+    if user.is_admin?
+      "(administrator)"
+    elsif user.is_moderator?
+      "(moderator"
+    else
+      "(#{user.karma})"
+    end
+  end
+
 private
 
   def user_is_moderator?

app/models/comment.rb

@@ -353,20 +353,6 @@ class Comment < ApplicationRecord
     self.updated_at && (self.updated_at - self.created_at > 1.minute)
   end
 
-  def html_class_for_user
-    c = []
-    if !self.user.is_active?
-      c.push "inactive_user"
-    elsif self.user.is_new?
-      c.push "new_user"
-    elsif self.story && self.story.user_is_author? &&
-          self.story.user_id == self.user_id
-      c.push "user_is_author"
-    end
-
-    c.join("")
-  end
-
   def is_deletable_by_user?(user)
     if user && user.is_moderator?
       return true

app/models/story.rb

@@ -478,19 +478,6 @@ class Story < ApplicationRecord
     @hider_count ||= HiddenStory.where(:story_id => self.id).count
   end
 
-  def html_class_for_user
-    c = []
-    if !self.user.is_active?
-      c.push "inactive_user"
-    elsif self.user.is_new?
-      c.push "new_user"
-    elsif self.user_is_author?
-      c.push "user_is_author"
-    end
-
-    c.join("")
-  end
-
   def is_flaggable?
     if self.created_at && self.score > FLAGGABLE_MIN_SCORE
       Time.current - self.created_at <= FLAGGABLE_DAYS.days

app/views/about/about.html.erb

@@ -7,8 +7,8 @@
   <p>
   Lobsters is a computing-focused community centered around link aggregation
   and discussion, launched on July 3rd, 2012.
-  The administrator is <a href="/u/pushcx">Peter Bhat Harkins</a> ("pushcx"), contact him with any support issues.
+  The administrator is <a href="/~pushcx">Peter Bhat Harkins</a> ("pushcx"), contact him with any support issues.
-  Lobsters was created by <a href="/u/jcs">joshua stein</a>
+  Lobsters was created by <a href="/~jcs">joshua stein</a>
   with careful design touches to encourage a healthy community:
   </p>
 
@@ -87,7 +87,7 @@
 
   <h2 id="invitations">Invitation Tree</h2>
   <p>
-  The full <a href="/u">user tree</a> is public and each user's profile
+  The full <%= link_to 'user tree', users_tree_path %> is public and each user's profile
   shows who invited them.  This provides some degree of accountability and
   helps identify voting rings.
   </p>
@@ -113,7 +113,7 @@
   </p>
 
   <p>
-  The quickest way to receive an invitation is to talk to someone you <a href="/u">recognize from the site</a>.
+  The quickest way to receive an invitation is to talk to someone you <%= link_to 'recognize from the site', users_tree_path %>.
   If you wrote a link that was posted, please reach out in <a href="/chat">chat</a>, we'd love to have you join the discussion.
   Finally, if you can't find anyone you know in the invitation tree and didn't author something posted to the site,
   <% if Rails.application.allow_invitation_requests? %>
@@ -176,7 +176,7 @@
   <h2 id="transparency">Transparency Policy</h2>
   <p>
   All <a href="/moderations">moderator actions</a> on this site are visible to
-  everyone and the identities of those moderators are <a href="/u?moderators=1">public</a>.
+  everyone and the identities of those moderators are <%= link_to 'public', moderators_path %>.
   While the individual actions of a moderator may cause debate, there should be no question about if an action happened or who is responsible.
   </p>
 

app/views/about/chat.html.erb

@@ -9,11 +9,11 @@
   in <tt>#lobsters</tt>.
   This channel was originally
   <a href="/s/2hdoop">created</a> by
-  <a href="/u/kristof">@kristof</a> on freenode, and
+  <a href="/~kristof">@kristof</a> on freenode, and
   <a href="https://lobste.rs/s/1z77ly/libera_chat#c_vwmpgx">stayed with the network</a> on 2021-05-19 after that domain was lost.
-  <a href="/u/pushcx">@pushcx</a>,
+  <a href="/~pushcx">@pushcx</a>,
-  <a href="/u/355e3b">@355e3b</a> (<tt>c355e3b</tt> on IRC), and
+  <a href="/~355e3b">@355e3b</a> (<tt>c355e3b</tt> on IRC), and
-  <a href="/u/aleph">@aleph</a> (<tt>Church</tt> on IRC) are channel operators.
+  <a href="/~aleph">@aleph</a> (<tt>Church</tt> on IRC) are channel operators.
   </p>
 
   <p>

app/views/comments/_comment.html.erb

@@ -49,13 +49,10 @@ class="comment <%= comment.current_vote ? (comment.current_vote[:vote] == 1 ?
       <% end %>
 
       <% if (@user && @user.show_avatars?) || !@user %>
-        <a href="/u/<%= comment.user.username %>"><%=
+        <%= link_to avatar_img(comment.user, 16), comment.user %>
-          avatar_img(comment.user, 16) %></a>
       <% end %>
 
-      <a href="/u/<%= comment.user.username %>"
+      <%= styled_user_link comment.user, comment %>
-        class="<%= comment.html_class_for_user %>"><%=
-        comment.user.username %></a>
 
       <% if comment.hat %>
         <%= comment.hat.to_html_label %>

app/views/comments/_threads.html.erb

@@ -81,13 +81,10 @@ class="comment <%= comment.current_vote ? (comment.current_vote[:vote] == 1 ?
       <% end %>
 
       <% if (@user && @user.show_avatars?) || !@user %>
-        <a href="/u/<%= comment.user.username %>"><%=
+        <%= link_to avatar_img(comment.user, 16), comment.user %>
-          avatar_img(comment.user, 16) %></a>
       <% end %>
 
-      <a href="/u/<%= comment.user.username %>"
+      <%= styled_user_link comment.user, comment %>
-        class="<%= comment.html_class_for_user %>"><%=
-        comment.user.username %></a>
 
       <% if comment.hat %>
         <%= comment.hat.to_html_label %>

app/views/hats/index.html.erb

@@ -21,8 +21,7 @@
   <% @hat_groups.keys.sort_by{|a| a.downcase }.each do |hg| %>
     <% @hat_groups[hg].sort_by{|hh| hh.user.username.downcase }.each do |hh| %>
       <tr>
-        <td><a href="/u/<%= hh.user.username %>"><%= hh.user.username
+        <td><%= styled_user_link hh.user %></td>
-          %></a></td>
         <td><%= hh.to_html_label %></td>
         <td>
           <% if hh.link.to_s.match(/^http/) %>

app/views/hats/requests_index.html.erb

@@ -11,7 +11,7 @@
         <p>
         <div class="boxline">
           <%= f.label :user_id, "User:", :class => "required" %>
-          <a href="/u/<%= hr.user.username %>"><%= hr.user.username %></a>
+          <%= styled_user_link hr.user %>
           <%= time_ago_in_words(hr.created_at) %>
         </div>
 

app/views/invitations/build.html.erb

@@ -1,6 +1,6 @@
 <div class="box wide">
   <p>
-  If you don't know (or can't find) an <a href="/u/">existing user</a> from
+  If you don't know (or can't find) an <%= link_to 'existing_user', users_tree_path %> from
   whom to request an invitation, you can make a public request for one.  This
   will display your name and memo to all other logged-in users who can then
   send you an invitation if they recognize you.

app/views/login/index.html.erb

@@ -36,7 +36,7 @@
         <p>
         Not a user yet?
         Read about <a href="/about#invitations">how invitations work</a> and see if you know
-        <a href="/u">a current user</a> of the site.
+        <%= link_to 'a current user', users_tree_path %> of the site.
         The <a href="/chat">chat room</a> does not require an invitation.
         </p>
       <% end %>

app/views/messages/index.html.erb

@@ -17,15 +17,13 @@
             <div style="white-space:nowrap;">
               <% if @direction == :in %>
                 <% if message.author %>
-                  <a href="/u/<%= message.author.username %>"><%=
+                  <%= styled_user_link message.author %>
-                    message.author.username %></a>
                 <% else %>
                   <%= message.author_username %>
                 <% end %>
                 <%= message.hat.to_html_label if message.hat %>
               <% else %>
-                <a href="/u/<%= message.recipient.username %>"><%=
+                <%= styled_user_link message.recipient %>
-                  message.recipient.username %></a>
               <% end %>
             </div>
           </td>

app/views/messages/show.html.erb

@@ -4,14 +4,13 @@
   <h2>
     From
     <% if @message.author %>
-      <a href="/u/<%= @message.author.username %>"><%= @message.author.username %></a>
+      <%= styled_user_link @message.author %>
     <% else %>
       <%= @message.author_username %>
     <% end %>
     <%= @message.hat.to_html_label if @message.hat %>
     to
-    <a href="/u/<%= @message.recipient.username %>"><%=
+    <%= styled_user_link @message.recipient %>
-      @message.recipient.username %></a>
     <%= time_ago_in_words_label(@message.created_at) %>
   </h2>
 
@@ -57,6 +56,6 @@
 
     <%= render partial: 'form', locals: { new_message: @new_message, replying: true } %>
   <% else %>
-    For help with this message, contact <a href="/u?moderators=1">a moderator</a>.
+    For help with this message, contact <%= link_to 'a moderator', moderators_path %>.
   <% end %>
 </div>

app/views/moderations/_table.html.erb

@@ -27,8 +27,7 @@
         <%= link_to("Category: #{mod.category.category}", mod.category) %>
       <% elsif mod.user_id %>
         <% if mod.user %>
-          <a href="/u/<%= mod.user.username %>">User
+          <%= link_to "User #{mod.user.username}", mod.user %>
-            <%= mod.user.username %></a>
         <% else %>
           User <%= mod.user_id %> (Deleted)
         <% end %>

app/views/settings/index.html.erb

@@ -1,5 +1,5 @@
 <% content_for :subnav do %>
-  <a href="/u/<%= @user.username %>">Public Profile</a>
+  <%= link_to 'Public Profile', @user %>
   <a href="/filters">Filtered Tags</a> |
   <%= link_post 'Logout', logout_path, confirm: 'Are you sure you want to logout?' %>
 <% end %>
@@ -311,7 +311,7 @@
         <li>
           Your comments with negative scores will be deleted, and you can check "disown comments"
           below if you want all of your stories and comments to change to list
-          <a href="/u/inactive-user">inactive-user</a> instead of your username.
+          <a href="/~inactive-user">inactive-user</a> instead of your username.
         </li>
       </ul>
 

app/views/signup/index.html.erb

@@ -6,8 +6,8 @@
   <% else %>
     <p>
     Signup is currently by invitation only to combat spam and increase
-    accountability.  If you know <a href="/u/">a current user</a> of the site,
+    accountability.  If you know <%= link_to 'a current user', users_tree_path %>
-    ask them for an invitation, or
+    of the site, ask them for an invitation, or
     <% if Rails.application.allow_invitation_requests? %>
       <a href="/invitations/request">request one publicly</a>.
     <% else %>

app/views/signup/invited.html.erb

@@ -14,8 +14,7 @@
       <p>
       <%= f.label :invitation, "Invited By:", :class => "required" %>
       <span class="d">
-        <a href="/u/<%= @invitation.user.username %>" target="_blank"><%=
+        <%= link_to @invitation.user.username, user_path(@invitation.user), target: '_blank' %>
-          @invitation.user.username %></a>
       </span>
       </p>
     <% end %>

app/views/stories/_listdetail.html.erb

@@ -66,16 +66,14 @@ class="story <%= story.vote && story.vote[:vote] == 1 ? "upvoted" : "" %>
           <% end %>
           <span class="byline">
             <% if (@user && @user.show_avatars?) || !@user %>
-              <a href="/u/<%= ms.user.username %>"><%=
+              <%= link_to avatar_img(ms.user, 16), ms.user %>
-                avatar_img(ms.user, 16) %></a>
             <% end %>
             <% if ms.user_is_author? %>
               <span> authored by </span>
             <% else %>
               <span> via </span>
             <% end %>
-            <a href="/u/<%= ms.user.username %>" class="u-author h-card <%=
+            <%= styled_user_link ms.user, story, ['u-author', 'h-card'] %>
-              ms.html_class_for_user %>"><%= ms.user.username %></a>
 
             <%= time_ago_in_words_label(ms.created_at) %>
             <% if ms.is_editable_by_user?(@user) %>
@@ -98,8 +96,7 @@ class="story <%= story.vote && story.vote[:vote] == 1 ? "upvoted" : "" %>
 
     <div class="byline">
       <% if (@user && @user.show_avatars?) || !@user %>
-        <a href="/u/<%= story.user.username %>"><%=
+        <%= link_to avatar_img(story.user, 16), story.user %>
-          avatar_img(story.user, 16) %></a>
       <% end %>
       <% if story.previewing %>
         <% if story.user_is_author? %>
@@ -107,8 +104,8 @@ class="story <%= story.vote && story.vote[:vote] == 1 ? "upvoted" : "" %>
         <% else %>
           <span> via </span>
         <% end %>
-        <a class="u-author h-card <%= story.html_class_for_user %>"><%=
+
-          story.user.username %></a>
+        <%= styled_user_link story.user, story, ['u-author', 'h-card'] %>
         <span> just now </span>
       <% else %>
         <% if story.user_is_author? %>
@@ -116,8 +113,7 @@ class="story <%= story.vote && story.vote[:vote] == 1 ? "upvoted" : "" %>
         <% else %>
           <span> via </span>
         <% end %>
-        <a href="/u/<%= story.user.username %>" class="u-author h-card <%=
+        <%= styled_user_link story.user, story, ['u-author', 'h-card'] %>
-          story.html_class_for_user %>"><%= story.user.username %></a>
 
         <%= time_ago_in_words_label(story.created_at) %>
 

app/views/stories/_similar.html.erb

@@ -3,7 +3,7 @@
     <li>
       <a href="<%= story.url %>" target="_blank"><%= story.title %></a>
       <%= story.user_is_author? ? "authored by" : "via" %>
-      <a href="/u/<%= story.user.username %>" class="<%= story.html_class_for_user %>"><%= story.user.username %></a>
+      <%= styled_user_link story.user, story %>
       <%= time_ago_in_words_label(story.created_at) %>
       <span>
         |

app/views/users/_invitationform.html.erb

@@ -1,8 +1,8 @@
 <p>
-Invitations are unlimited, but persons you invite will be associated with your
+Invitations are unlimited, but persons you invite will be associated with your account
-account in the <a href="/u">user tree</a> and you may be responsible for them
+in the <%= link_to 'user tree', users_tree_path %>
-if they cause problems.  Please use your discretion when inviting persons you
+and you may be responsible for them if they cause problems.
-don't personally know.
+Please use your discretion when inviting persons you don't personally know.
 </p>
 
 <%= form_with url: invitations_path, method: :post do |f| %>

app/views/users/list.html.erb

@@ -6,20 +6,8 @@
   <ul class="user_tree">
   <% @users.each do |user| %>
     <li>
-      <a href="/u/<%= user.username %>"
+      <%= styled_user_link(user) %>
-        <% if !user.is_active? %>
+      <%= user_karma(user) %>
-          class="inactive_user"
-        <% elsif user.is_new? %>
-          class="new_user"
-        <% end %>
-        ><%= user.username %></a>
-      <% if user.is_admin? %>
-        (administrator)
-      <% elsif user.is_moderator? %>
-        (moderator)
-      <% else %>
-        (<%= user.karma %>)
-      <% end %>
     </li>
   <% end %>
   </ul>

app/views/users/show.html.erb

@@ -39,9 +39,8 @@
   <span class="d">
     <%= time_ago_in_words_label(@showing_user.created_at) %>
     <% if @showing_user.invited_by_user %>
-      by <a href="/u#<%= @showing_user.username %>">invitation</a> from
+      by <%= link_to 'invitation', users_tree_path(anchor: @showing_user.username) %> from
-      <%= link_to @showing_user.invited_by_user.try(:username),
+      <%= link_to @showing_user.invited_by_user.try(:username), @showing_user.invited_by_user %>
-        @showing_user.invited_by_user %>
     <% end %>
   </span>
   <br>
@@ -215,14 +214,14 @@
         <% @showing_user.votes_for_others.limit(15).each do |v| %><tr>
           <td><%= v.vote == 1 ? '+' : v.reason %></td>
           <% if v.comment_id %>
-            <td><a href="/u/<%= v.comment.user.try(:username) %>"><%= v.comment.user.try(:username) %></a></td>
+            <td><a href="/~<%= v.comment.user.try(:username) %>"><%= v.comment.user.try(:username) %></a></td>
             <td>
               <%= v.story.title %>
               <a href="<%= v.comment.short_id_url %>">comment</a>:<br>
               <%= v.comment.comment.split[0..10].join(' ') %>
             </td>
           <% elsif v.story_id && !v.comment_id %>
-            <td><a href="/u/<%= v.story.user.try(:username) %>"><%= v.story.user.try(:username) %></a></td>
+            <td><a href="/~<%= v.story.user.try(:username) %>"><%= v.story.user.try(:username) %></a></td>
             <td><a href="<%= v.story.short_id_url %>"><%= v.story.title %></a></td>
           <% end %>
           </p>

app/views/users/tree.html.erb

@@ -4,9 +4,10 @@
   <% if @newest %>
     <p>
     Newest users:
-    <%= raw @newest.map{|u| "<a href=\"##{u.username}\" class=\"" <<
+    <% @newest.each do |user| %>
-      (u.is_new?? "new_user" : "") << "\">#{u.username}</a> " <<
+      <%= styled_user_link user %>
-      "(#{u.karma})" }.join(", ") %>
+      <%= user_karma(user) %><%= ',' if user != @newest.last %>
+    <% end %>
     </p>
   <% end %>
 
@@ -18,20 +19,9 @@
     <% while subtree %>
       <% if (user = subtree.pop) %>
         <li class="<%= user.invited_by_user_id ? "" : "noparent" %>">
-          <a name="<%= user.username %>" href="/u/<%= user.username %>"
+          <%= styled_user_link user %>
-            <% if !user.is_active? %>
+          <%= user_karma(user) %>
-              class="inactive_user"
+
-            <% elsif user.is_new? %>
-              class="new_user"
-            <% end %>
-            ><%= user.username %></a>
-          <% if user.is_admin? %>
-            (administrator)
-          <% elsif user.is_moderator? %>
-            (moderator)
-          <% else %>
-            (<%= user.karma %>)
-          <% end %>
           <% if (children = @users_by_parent[user.id]) %>
             <% # drill down deeper in the tree %>
             <% ancestors << subtree %>

config/routes.rb

@@ -14,8 +14,6 @@ Rails.application.routes.draw do
   get "/active/page/:page" => "home#active"
   get "/newest" => "home#newest"
   get "/newest/page/:page" => "home#newest"
-  get "/newest/:user" => "home#newest_by_user"
-  get "/newest/:user/page/:page" => "home#newest_by_user"
   get "/recent" => "home#recent"
   get "/recent/page/:page" => "home#recent"
   get "/hidden" => "home#hidden"
@@ -37,7 +35,6 @@ Rails.application.routes.draw do
   get "/top/:length/page/:page" => "home#top"
 
   get "/threads" => "comments#user_threads"
-  get "/threads/:user" => "comments#user_threads", :as => "user_threads"
 
   get "/replies" => "replies#all"
   get "/replies/page/:page" => "replies#all"
@@ -133,20 +130,32 @@ Rails.application.routes.draw do
 
   get "/s/:id/(:title)" => "stories#show"
 
-  get "/u" => "users#tree"
+  get "/users" => "users#tree", :as => "users_tree"
-  get "/u/:username" => "users#show", :as => "user"
+  get "/~:username" => "users#show", :as => "user"
-  get "/u/:username/standing" => "users#standing", :as => "user_standing"
+  get "/~:username/standing" => "users#standing", :as => "user_standing"
+  get "/~:user/stories(/page/:page)" => "home#newest_by_user"
+  get "/~:user/threads" => "comments#user_threads", :as => "user_threads"
+
+  post "/~:username/ban" => "users#ban", :as => "user_ban"
+  post "/~:username/unban" => "users#unban", :as => "user_unban"
+  post "/~:username/disable_invitation" => "users#disable_invitation",
+        :as => "user_disable_invite"
+  post "/~:username/enable_invitation" => "users#enable_invitation",
+        :as => "user_enable_invite"
+
+  # 2023-07 redirect /u to /~username and /users (for tree)
+  get "/u", to: redirect("/users", status: 302)
+  get "/u/:username", to: redirect("/~%{username}", status: 302)
+  # we don't do /@alice but easy mistake with comments autolinking @alice
+  get "/@:username", to: redirect("/~%{username}", status: 302)
+  get "/u/:username/standing", to: redirect("~%{username}/standing", status: 302)
+  get "/newest/:user", to: redirect("~%{user}/stories", status: 302)
+  get "/newest/:user(/page/:page)", to: redirect("~%{user}/stories/page/%{page}", status: 302)
+  get "/threads/:user", to: redirect("~%{user}/threads", status: 302)
 
   get "/avatars/:username_size.png" => "avatars#show"
   post "/avatars/expire" => "avatars#expire"
 
-  post "/users/:username/ban" => "users#ban", :as => "user_ban"
-  post "/users/:username/unban" => "users#unban", :as => "user_unban"
-  post "/users/:username/disable_invitation" => "users#disable_invitation",
-        :as => "user_disable_invite"
-  post "/users/:username/enable_invitation" => "users#enable_invitation",
-        :as => "user_enable_invite"
-
   get "/settings" => "settings#index"
   post "/settings" => "settings#update"
   post "/settings/delete_account" => "settings#delete_account",

extras/markdowner.rb

@@ -51,7 +51,7 @@ class Markdowner
 
       if User.exists?(:username => user[1..-1])
         link = CommonMarker::Node.new(:link)
-        link.url = Rails.application.root_url + "u/#{user[1..-1]}"
+        link.url = Rails.application.root_url + "~#{user[1..-1]}"
         node.insert_after(link)
 
         link_text = CommonMarker::Node.new(:text)

spec/models/markdowner_spec.rb

@@ -10,7 +10,7 @@ describe Markdowner do
     create(:user, :username => "blahblah")
 
     expect(Markdowner.to_html("hi @blahblah test"))
-      .to eq("<p>hi <a href=\"https://lobste.rs/u/blahblah\" rel=\"ugc\">" +
+      .to eq("<p>hi <a href=\"https://lobste.rs/~blahblah\" rel=\"ugc\">" +
              "@blahblah</a> test</p>\n")
 
     expect(Markdowner.to_html("hi @flimflam test"))
@@ -46,8 +46,8 @@ describe Markdowner do
       .to eq("<p><a href=\"//example.com\" rel=\"ugc\">" +
             "ex</a></p>\n")
 
-    expect(Markdowner.to_html("[ex](/u/abc)"))
+    expect(Markdowner.to_html("[ex](/~abc)"))
-      .to eq("<p><a href=\"/u/abc\">ex</a></p>\n")
+      .to eq("<p><a href=\"/~abc\">ex</a></p>\n")
   end
 
   context "when images are not allowed" do

spec/requests/users_controller_spec.rb

@@ -5,7 +5,7 @@ describe 'users controller' do
     it 'displays the username' do
       user = create(:user)
 
-      get "/u/#{user.username}"
+      get "/~#{user.username}"
 
       expect(response.body).to include(user.username)
     end
@@ -29,7 +29,7 @@ describe 'users controller' do
     it "displays to the user" do
       sign_in bad_user
 
-      get "/u/#{bad_user.username}/standing"
+      get "/~#{bad_user.username}/standing"
       expect(response.body).to include("flags")
       expect(response.body).to include("You")
     end
@@ -38,12 +38,12 @@ describe 'users controller' do
       user2 = create(:user)
       sign_in user2
 
-      get "/u/#{bad_user.username}/standing"
+      get "/~#{bad_user.username}/standing"
       expect(response.status).to eq(302)
     end
 
     it "doesn't display to logged-out users" do
-      get "/u/#{bad_user.username}/standing"
+      get "/~#{bad_user.username}/standing"
       expect(response.status).to eq(302)
     end
 
@@ -51,7 +51,7 @@ describe 'users controller' do
       mod = create(:user, :moderator)
       sign_in mod
 
-      get "/u/#{bad_user.username}/standing"
+      get "/~#{bad_user.username}/standing"
       expect(response.body).to include("flags")
     end
   end

spec/routing/user_spec.rb

@@ -0,0 +1,66 @@
+require 'rails_helper'
+
+# rubocop:disable RSpec/MultipleDescribes
+describe 'user routing' do
+  it 'users#tree' do
+    assert_routing(
+      '/users',
+      controller: 'users', action: 'tree'
+    )
+  end
+
+  it 'users#show' do
+    assert_routing(
+      '/~alice',
+      controller: 'users', action: 'show', username: 'alice'
+    )
+  end
+
+  it 'home#stories' do
+    assert_routing(
+      '/~alice/stories',
+      controller: 'home', action: 'newest_by_user', user: 'alice'
+    )
+    assert_routing(
+      '/~alice/stories/page/2',
+      controller: 'home', action: 'newest_by_user', user: 'alice', page: '2'
+    )
+  end
+
+  it 'comments#user_threads' do
+    assert_routing(
+      '/~alice/threads',
+      controller: 'comments', action: 'user_threads', user: 'alice'
+    )
+  end
+end
+
+# odd Rails limitation: you can redirect from routes but not test those from routing tests
+describe 'user redirects', type: :request do
+  it 'old-style to tilde' do
+    expect(get('/u/alice')).to redirect_to('/~alice')
+  end
+
+  it 'user tree' do
+    expect(get('/u')).to redirect_to('/users')
+  end
+
+  it 'newest stories' do
+    expect(get('/newest/alice')).to redirect_to('/~alice/stories')
+    expect(get('/newest/alice/page/2')).to redirect_to('/~alice/stories/page/2')
+  end
+
+  it 'threads' do
+    expect(get('/threads/alice')).to redirect_to('/~alice/threads')
+  end
+
+  # 2023-07: I'm deploying with 302 redirects so I don't have to worry about 301s getting
+  # indefinitely cached in case of error, but after some time to build confidence, it's appropriate
+  # to 301. I'm putting a time bomb test in here to remind me to finalize.
+  it 'is temporarily temporary' do
+    expect(get('/u/alice')).to eq(302)
+
+    expect(Time.zone.today).to be_before(Date.new(2024, 1, 1))
+  end
+end
+# rubocop:enable RSpec/MultipleDescribes