feat(messages): add html formatting to messages

This commit allows users to use the trix editor to send
messages with basic formatting and attachements.

* add active storage
* add actiontext
* add richtext field to messages
* add imageprocessing for message attachements
* add html email layout and adjust translations to use html urls

app/assets/stylesheets/actiontext.css

@@ -0,0 +1,31 @@
+/*
+ * Provides a drop-in pointer for the default Trix stylesheet that will format the toolbar and
+ * the trix-editor content (whether displayed or under editing). Feel free to incorporate this
+ * inclusion directly in any other asset bundle and remove this file.
+ *
+ *= require trix
+*/
+
+/*
+ * We need to override trix.css’s image gallery styles to accommodate the
+ * <action-text-attachment> element we wrap around attachments. Otherwise,
+ * images in galleries will be squished by the max-width: 33%; rule.
+*/
+.trix-content .attachment-gallery > action-text-attachment,
+.trix-content .attachment-gallery > .attachment {
+  flex: 1 0 33%;
+  padding: 0 0.5em;
+  max-width: 33%;
+}
+
+.trix-content .attachment-gallery.attachment-gallery--2 > action-text-attachment,
+.trix-content .attachment-gallery.attachment-gallery--2 > .attachment, .trix-content .attachment-gallery.attachment-gallery--4 > action-text-attachment,
+.trix-content .attachment-gallery.attachment-gallery--4 > .attachment {
+  flex-basis: 50%;
+  max-width: 50%;
+}
+
+.trix-content action-text-attachment .attachment {
+  padding: 0 !important;
+  max-width: 100% !important;
+}

app/assets/stylesheets/application.css

@@ -7,4 +7,5 @@
 *= require list.unlist
 *= require list.missing
 *= require recurring_select
+*= require actiontext
 */

app/javascript/application.js

@@ -1 +1,3 @@
 // Configure your import map in config/importmap.rb. Read more: https://github.com/rails/importmap-rails
+import "trix"
+import "@rails/actiontext"

app/views/active_storage/blobs/_blob.html.erb

@@ -0,0 +1,14 @@
+<figure class="attachment attachment--<%= blob.representable? ? "preview" : "file" %> attachment--<%= blob.filename.extension %>">
+  <% if blob.representable? %>
+    <%= image_tag blob.representation(resize_to_limit: local_assigns[:in_gallery] ? [ 800, 600 ] : [ 1024, 768 ]) %>
+  <% end %>
+
+  <figcaption class="attachment__caption">
+    <% if caption = blob.try(:caption) %>
+      <%= caption %>
+    <% else %>
+      <span class="attachment__name"><%= blob.filename %></span>
+      <span class="attachment__size"><%= number_to_human_size blob.byte_size %></span>
+    <% end %>
+  </figcaption>
+</figure>

app/views/layouts/action_text/contents/_content.html.erb

@@ -0,0 +1,3 @@
+<div class="trix-content">
+  <%= yield -%>
+</div>

app/views/layouts/email.html.haml

@@ -0,0 +1,12 @@
+= yield
+\
+%hr
+%ul
+  %li
+    %a{href: root_url} Foodsoft
+  - if FoodsoftConfig[:homepage]
+    %li
+      %a{href: FoodsoftConfig[:homepage]} Foodcoop
+  - if FoodsoftConfig[:help_url]
+    %li
+      %a{href: FoodsoftConfig[:help_url]}= t '.help'