Add alternate comparison types to versions

- The types are:
-- Previous: The default and the previously used type
-- Subsequent: Compares against the next version
-- Current: Compares against the current version
- Allow switching between comparison types in index and diff views
-- Have links vary depending upon current comparison type

app/views/application/_diff_list.html.erb

@@ -2,11 +2,11 @@
 
 <%= tag.ul class: [*ul_class] do %>
   <% diff.added.each do |item| %>
-    <%= tag.li item, class: ["added", ("obsolete" if item.in?(diff.obsolete_added)), *li_class] %>
+    <%= tag.li item, class: ["added", *li_class] %>
   <% end %>
 
   <% diff.removed.each do |item| %>
-    <%= tag.li item, class: ["removed", ("obsolete" if item.in?(diff.obsolete_removed)), *li_class] %>
+    <%= tag.li item, class: ["removed", *li_class] %>
   <% end %>
 
   <% diff.changed.each do |old, new| %>

app/views/artist_commentary_versions/_listing.html.erb

@@ -19,13 +19,13 @@
       <% if !commentary_version.unchanged_empty?(:original_title) %>
         <b>Title:</b>
         <div class="commentary-body-section">
-          <%= diff_body_html(commentary_version, commentary_version.previous, :original_title) %>
+          <%= commentary_version_field_diff(commentary_version, params[:type], :original_title) %>
         </div>
       <% end %>
       <% if !commentary_version.unchanged_empty?(:original_description) %>
         <b>Description:</b>
         <div class="commentary-body-section">
-          <%= diff_body_html(commentary_version, commentary_version.previous, :original_description) %>
+          <%= commentary_version_field_diff(commentary_version, params[:type], :original_description) %>
         </div>
       <% end %>
     <% end %>
@@ -33,18 +33,18 @@
       <% if !commentary_version.unchanged_empty?(:translated_title) %>
         <b>Title:</b>
         <div class="commentary-body-section">
-          <%= diff_body_html(commentary_version, commentary_version.previous, :translated_title) %>
+          <%= commentary_version_field_diff(commentary_version, params[:type], :translated_title) %>
         </div>
       <% end %>
       <% if !commentary_version.unchanged_empty?(:translated_description) %>
         <b>Description:</b>
         <div class="commentary-body-section">
-          <%= diff_body_html(commentary_version, commentary_version.previous, :translated_description) %>
+          <%= commentary_version_field_diff(commentary_version, params[:type], :translated_description) %>
         </div>
       <% end %>
     <% end %>
     <% t.column "Changes", width: "3%" do |commentary_version| %>
-      <%= status_diff_html(commentary_version) %>
+      <%= status_diff_html(commentary_version, params[:type]) %>
     <% end %>
     <% t.column "Updated", width: "10%" do |commentary_version| %>
       <div>

app/views/artist_commentary_versions/index.html.erb

@@ -2,6 +2,8 @@
   <div id="a-index">
     <h1>Artist Commentary History</h1>
 
+    <%= render "versions/types" %>
+
     <%= render "posts/partials/common/inline_blacklist" %>
 
     <%= render "listing" %>

app/views/artist_versions/_listing.html.erb

@@ -4,17 +4,17 @@
       <% t.column "Name", td: {class: "diff-body"} do |artist_version| %>
         <%= link_to artist_version.name, artist_path(artist_version.artist_id) %>
         <%= link_to "»", artist_versions_path(search: {artist_id: artist_version.artist_id}, anchor: "artist-version-#{artist_version.id}") %>
-        <%= artist_version_name_diff(artist_version) %>
+        <%= artist_version_name_diff(artist_version, params[:type]) %>
       <% end %>
       <% t.column "Other Names", td: {class: "diff-body"} do |artist_version| %>
-        <%= artist_version_group_name_diff(artist_version) %>
-        <%= artist_version_other_names_diff(artist_version) %>
+        <%= artist_version_group_name_diff(artist_version, params[:type]) %>
+        <%= artist_version_other_names_diff(artist_version, params[:type]) %>
       <% end %>
       <% t.column "URLs", td: {class: "col-expand"} do |artist_version| %>
-        <%= artist_version_urls_diff(artist_version) %>
+        <%= artist_version_urls_diff(artist_version, params[:type]) %>
       <% end %>
       <% t.column "Changes" do |artist_version| %>
-        <%= status_diff_html(artist_version) %>
+        <%= status_diff_html(artist_version, params[:type]) %>
       <% end %>
       <% t.column "Updated" do |artist_version| %>
         <%= link_to_user artist_version.updater %>

app/views/artist_versions/index.html.erb

@@ -2,6 +2,8 @@
   <div id="a-index">
     <h1>Artist History</h1>
 
+    <%= render "versions/types" %>
+
     <%= render "listing" %>
 
     <%= numbered_paginator(@artist_versions, :search_count => params[:search]) %>

app/views/note_versions/_listing.html.erb

@@ -14,16 +14,16 @@
         <% end %>
       <% end %>
       <% t.column "Body", td: {class: "col-expand diff-body"} do |note_version| %>
-        <%= diff_body_html(note_version, note_version.previous, :body) %>
+        <%= note_version_body_diff(note_version, params[:type]) %>
       <% end %>
       <% t.column "Position (X,Y)", width: "5%", column: "position" do |note_version| %>
-        <%= note_version_position_diff(note_version) %>
+        <%= note_version_position_diff(note_version, params[:type]) %>
       <% end %>
       <% t.column "Size (WxH)", width: "5%", column: "size"  do |note_version| %>
-        <%= note_version_size_diff(note_version) %>
+        <%= note_version_size_diff(note_version, params[:type]) %>
       <% end %>
       <% t.column "Changes", width: "3%" do |note_version| %>
-        <%= status_diff_html(note_version) %>
+        <%= status_diff_html(note_version, params[:type]) %>
       <% end %>
       <% t.column "Updated", width: "10%" do |note_version| %>
         <div>

app/views/note_versions/index.html.erb

@@ -2,6 +2,8 @@
   <div id="a-index">
     <h1>Note History</h1>
 
+    <%= render "versions/types" %>
+
     <%= render "listing" %>
 
     <%= numbered_paginator(@note_versions) %>

app/views/pool_versions/_listing.html.erb

@@ -2,21 +2,21 @@
 
     <%= table_for @pool_versions, {class: "striped autofit", width: "100%"} do |t| %>
       <% t.column column: "diff", width: "3%" do |pool_version| %>
-        <%= link_to_if pool_version_show_diff(pool_version), "diff", diff_pool_version_path(pool_version.id) %>
+        <%= link_to_if pool_version_show_diff(pool_version, params[:type]), "diff", diff_pool_version_path(pool_version.id) %>
       <% end %>
       <% t.column "Pool", td: {class: "diff-body"} do |pool_version| %>
         <%= link_to pool_version.pretty_name, pool_path(pool_version.pool_id), class: "pool-category-#{pool_version.pool.category}" %>
         <%= link_to "»", pool_versions_path(search: { pool_id: pool_version.pool_id }, anchor: "pool-version-#{pool_version.id}"), class: "pool-category-#{pool_version.pool.category}" %>
-        <%= pool_version_name_diff(pool_version) %>
+        <%= pool_version_name_diff(pool_version, params[:type]) %>
       <% end %>
       <% t.column "Post Changes", td: { class: "col-expand" } do |pool_version| %>
-        <%= pool_version_post_diff(pool_version) %>
+        <%= pool_version_post_diff(pool_version, params[:type]) %>
       <% end %>
       <% t.column "Post Count" do |pool_version| %>
         <%= link_to pool_version.post_ids.size, pool_versions_path(search: { pool_id: pool_version.pool_id }) %>
       <% end %>
       <% t.column "Changes", td: {class: "col-expand"} do |pool_version| %>
-        <%= status_diff_html(pool_version) %>
+        <%= status_diff_html(pool_version, params[:type]) %>
       <% end %>
       <% t.column "Updated", width: "10%" do |pool_version| %>
         <div>

app/views/pool_versions/diff.html.erb

@@ -3,18 +3,26 @@
 
 <div id="c-pool-versions">
   <div id="a-diff">
-    <h1>Pool Version Comparison: <%= link_to @pool_version.pretty_name, pool_versions_path(search: { pool_id: @pool_version.pool_id }, anchor: "pool-version-#{@pool_version.id}"), class: "pool-category-#{@pool_version.pool.category}" %></h1>
+    <h1>Pool Version Comparison: <%= link_to @pool_version.pretty_name, pool_versions_path(search: { pool_id: @pool_version.pool_id }, type: params[:type], anchor: "pool-version-#{@pool_version.id}"), class: "pool-category-#{@pool_version.pool.category}" %></h1>
+
+    <%= render "versions/types" %>
 
     <% if @other_version.present? %>
-      <p>Showing differences between <%= compact_time @pool_version.updated_at %> (<%= link_to_user @pool_version.updater %>) and <%= compact_time @other_version.updated_at %> (<%= link_to_user @other_version.updater %>)</p>
+      <% if @pool_version.id != @other_version.id %>
+        <p>Showing differences between <%= compact_time @pool_version.updated_at %> (<%= link_to_user @pool_version.updater %>) and <%= compact_time @other_version.updated_at %> (<%= link_to_user @other_version.updater %>)</p>
 
-      <% if @pool_version.description != @other_version.description %>
-        <div class="diff-body">
-            <%= diff_body_html(@pool_version, @other_version, :description) %>
-        </div>
+        <% if @pool_version.description != @other_version.description %>
+          <div class="diff-body">
+              <%= diff_body_html(@pool_version, @other_version, :description) %>
+          </div>
+        <% else %>
+          <p><em>No changes to description.</em></p>
+        <% end %>
       <% else %>
-        <p><em>No changes to description.</em></p>
+        <p><em>Version is latest!</em></p>
       <% end %>
+    <% else %>
+      <p><em>No versions to compare!</em></p>
     <% end %>
   </div>
 </div>

app/views/pool_versions/index.html.erb

@@ -2,6 +2,8 @@
   <div id="a-index">
     <h1>Pool History</h1>
 
+    <%= render "versions/types" %>
+
     <%= render "listing" %>
 
     <%= numbered_paginator(@pool_versions) %>

app/views/post_versions/_listing.html.erb

@@ -18,10 +18,10 @@
         <%= link_to "#{post_version.post_id}.#{post_version.version}", post_versions_path(search: { post_id: post_version.post_id }, anchor: "post-version-#{post_version.id}") %>
       <% end %>
       <% t.column "Tags", td: {class: "col-expand"} do |post_version| %>
-        <%= post_version_diff(post_version) %>
+        <%= post_version_diff(post_version, params[:type]) %>
       <% end %>
       <% t.column "Changes" do |post_version| %>
-        <%= status_diff_html(post_version) %>
+        <%= status_diff_html(post_version, params[:type]) %>
       <% end %>
       <% t.column "Updated" do |post_version| %>
         <%= link_to_user post_version.updater %>

app/views/post_versions/index.html.erb

@@ -6,6 +6,8 @@
       <h1>Post History</h1>
     <% end %>
 
+    <%= render "versions/types" %>
+
     <%= search_form_for(post_versions_path, classes: "inline-form") do |f| %>
       <%= f.input :post_id, label: "Post", input_html: { value: params.dig(:search, :post_id) } %>
       <%= f.input :updater_name, label: "Updater", input_html: { "data-autocomplete": "user", value: params.dig(:search, :updater_name) } %>

app/views/versions/_types.html.erb

@@ -0,0 +1,6 @@
+<div id="version-comparisons">
+  <span>Version comparison:</span>
+  <ul id="version-comparisons-list">
+    <%= version_type_links(params) %>
+  </ul>
+</div>

app/views/wiki_page_versions/_listing.html.erb

@@ -2,7 +2,7 @@
   <%= form_tag(diff_wiki_page_versions_path, :method => :get) do %>
     <%= table_for @wiki_page_versions.includes(:updater, :tag), width: "100%" do |t| %>
       <% t.column column: "diff", width: "3%" do |wiki_page_version, i| %>
-        <%= link_to_if wiki_version_show_diff(wiki_page_version), "diff", diff_wiki_page_versions_path(otherpage: wiki_page_version.previous.try(:id), thispage: wiki_page_version.id) %>
+        <%= link_to_if wiki_version_show_diff(wiki_page_version, params[:type]), "diff", diff_wiki_page_versions_path(thispage: wiki_page_version.id, type: params[:type]) %>
       <% end %>
 
       <% if listing_type(:wiki_page_id, member_check: false, types: [:page, :global]) == :page %>
@@ -20,10 +20,10 @@
           <%= link_to wiki_page_version.title, wiki_page_version %>
           <%= link_to "»", wiki_page_versions_path(search: { wiki_page_id: wiki_page_version.wiki_page_id }) %>
         </span>
-        <%= wiki_version_title_diff(wiki_page_version) %>
+        <%= wiki_version_title_diff(wiki_page_version, params[:type]) %>
       <% end %>
       <% t.column "Changes", width: "5%" do |wiki_page_version| %>
-        <%= status_diff_html(wiki_page_version) %>
+        <%= status_diff_html(wiki_page_version, params[:type]) %>
       <% end %>
       <% t.column "Updated", width: "26%" do |wiki_page_version| %>
         <%= compact_time(wiki_page_version.updated_at) %>

app/views/wiki_page_versions/diff.html.erb

@@ -4,21 +4,33 @@
 <%= render "wiki_pages/sidebar" %>
 
 <% content_for(:content) do %>
-  <h1>Wiki Page Version Comparison:  <%= link_to @thispage.title, wiki_page_versions_path(search: { wiki_page_id: @thispage.wiki_page_id }, anchor: "wiki-page-version-#{@thispage.id}"), class: "tag-type-#{@thispage.wiki_page.category_name}" %></h1>
+  <h1>Wiki Page Version Comparison:  <%= link_to @thispage.title, wiki_page_versions_path(search: { wiki_page_id: @thispage.wiki_page_id }, type: params[:type], anchor: "wiki-page-version-#{@thispage.id}"), class: "tag-type-#{@thispage.wiki_page.category_name}" %></h1>
 
-  <p>Showing differences between <%= compact_time @thispage.updated_at %> (<%= link_to_user @thispage.updater %>) and <%= compact_time @otherpage.updated_at %> (<%= link_to_user @otherpage.updater %>)</p>
-
-  <% if wiki_version_show_other_names(@thispage, @otherpage) %>
-    <p><%= wiki_version_other_names_diff(@thispage, @otherpage) %></p>
-  <% else %>
-    <p><em>No changes to other names.</em></p>
+  <% if params[:type].present? %>
+    <%= render "versions/types" %>
   <% end %>
 
-  <% if @thispage.body != @otherpage.body %>
-    <div class="diff-body">
-      <%= diff_body_html(@thispage, @otherpage, :body) %>
-    </div>
+  <% if @otherpage.present? %>
+    <% if @thispage.id != @otherpage.id %>
+      <p>Showing differences between <%= compact_time @thispage.updated_at %> (<%= link_to_user @thispage.updater %>) and <%= compact_time @otherpage.updated_at %> (<%= link_to_user @otherpage.updater %>)</p>
+
+      <% if wiki_version_show_other_names(@thispage, @otherpage) %>
+        <p><%= wiki_version_other_names_diff(@thispage, @otherpage) %></p>
+      <% else %>
+        <p><em>No changes to other names.</em></p>
+      <% end %>
+
+      <% if @thispage.body != @otherpage.body %>
+        <div class="diff-body">
+          <%= diff_body_html(@thispage, @otherpage, :body) %>
+        </div>
+      <% else %>
+        <p><em>No changes to body.</em></p>
+      <% end %>
+    <% else %>
+      <p><em>Version is latest!</em></p>
+    <% end %>
   <% else %>
-    <p><em>No changes to body.</em></p>
+    <p><em>No versions to compare!</em></p>
   <% end %>
 <% end %>

app/views/wiki_page_versions/index.html.erb

@@ -3,6 +3,8 @@
 <% content_for(:content) do %>
   <h1>Wiki Page History</h1>
 
+  <%= render "versions/types" %>
+
   <%= render "listing" %>
 
   <%= numbered_paginator(@wiki_page_versions) %>