bans: change expires_at field to duration.

Changes:

* Change the `expires_at` field to `duration`.
* Make moderators choose from a fixed set of standard ban lengths,
  instead of allowing arbitrary ban lengths.
* List `duration` in seconds in the /bans.json API.
* Dump bans to BigQuery.

Note that some old bans have a negative duration. This is because their
expiration date was before their creation date, which is because in 2013
bans were migrated to Danbooru 2 and the original ban creation dates
were lost.

app/views/bans/_form.html.erb

@@ -1,6 +1,9 @@
 <%= edit_form_for(ban) do |f| %>
-  <%= f.input :user_name, :as => :string, :input_html => { data: { autocomplete: "user" } } %>
-  <%= f.input :duration, :hint => "in days" %>
+  <% if ban.new_record? %>
+    <%= f.input :user_name, as: :string, input_html: { "data-autocomplete": "user" } %>
+  <% end %>
+
+  <%= f.input :duration, collection: [["1 day", 1.day.iso8601], ["3 days", 3.days.iso8601], ["1 week", 1.week.iso8601], ["1 month", 1.month.iso8601], ["3 months", 3.months.iso8601], ["6 months", 6.months.iso8601], ["1 year", 1.year.iso8601], ["forever", 100.years.iso8601]] %>
   <%= f.input :reason %>
-  <%= f.button :submit, :value => "Ban" %>
+  <%= f.button :submit %>
 <% end %>

app/views/bans/destroy.js.erb

@@ -1 +1 @@
-$("#ban-<%= @ban.id %>").remove();
+location.reload();

app/views/bans/edit.html.erb

@@ -2,11 +2,7 @@
   <div id="a-edit">
     <h1>Edit Ban</h1>
 
-    <%= edit_form_for(@ban) do |f| %>
-      <%= f.input :duration, :hint => "in days" %>
-      <%= f.input :reason %>
-      <%= f.button :submit, :value => "Ban" %>
-    <% end %>
+    <%= render "form", ban: @ban %>
   </div>
 </div>
 

app/views/bans/index.html.erb

@@ -9,14 +9,14 @@
         <%= link_to_user(ban.user) %>
         <%= link_to "»", bans_path(search: search_params.merge(user_name: ban.user.name)) %>
       <% end %>
-      <% t.column "Duration" do |ban| %>
-        <%= humanized_duration(ban.created_at, ban.expires_at) %>
-      <% end %>
       <% t.column "Reason", td: {class: "col-expand"} do |ban| %>
         <div class="prose">
           <%= format_text ban.reason %>
         </div>
       <% end %>
+      <% t.column "Duration" do |ban| %>
+        <%= humanized_duration(ban.created_at, ban.expires_at) %>
+      <% end %>
       <% t.column "Banner" do |ban| %>
         <%= link_to_user ban.banner %>
         <%= link_to "»", bans_path(search: { banner_name: ban.banner.name }) %>

app/views/bans/show.html.erb

@@ -5,10 +5,10 @@
   <div id="a-show">
     <h1>Show Ban</h1>
     <ul style="margin-bottom: 1em;">
-      <li><strong>User</strong>: <%= link_to_user(@ban.user) %></li>
-      <li><strong>Expires</strong>: <%= compact_time @ban.expires_at %></li>
+      <li><strong>User</strong> <%= link_to_user(@ban.user) %></li>
+      <li><strong>Duration</strong> <%= humanized_duration(@ban.created_at, @ban.expires_at) %></li>
       <li>
-        <strong>Reason</strong>:
+        <strong>Reason</strong>
         <div class="prose">
           <%= format_text @ban.reason %>
         </div>