Admin interface for listing, adding and removing custom emojis (#5002)

* Admin interface for listing, adding and removing custom emojis

* Only display local ones in the list

app/views/admin/custom_emojis/_custom_emoji.html.haml

@@ -0,0 +1,7 @@
+%tr
+  %td
+    = image_tag custom_emoji.image.url, class: 'emojione', alt: ":#{custom_emoji.shortcode}:"
+  %td
+    %samp= ":#{custom_emoji.shortcode}:"
+  %td
+    = table_link_to 'times', t('admin.custom_emojis.delete'), admin_custom_emoji_path(custom_emoji), method: :delete, data: { confirm: t('admin.accounts.are_you_sure') }

app/views/admin/custom_emojis/index.html.haml

@@ -0,0 +1,14 @@
+- content_for :page_title do
+  = t('admin.custom_emojis.title')
+
+.table-wrapper
+  %table.table
+    %thead
+      %tr
+        %th= t('admin.custom_emojis.emoji')
+        %th= t('admin.custom_emojis.shortcode')
+        %th
+    %tbody
+      = render @custom_emojis
+
+= link_to t('admin.custom_emojis.upload'), new_admin_custom_emoji_path, class: 'button'

app/views/admin/custom_emojis/new.html.haml

@@ -0,0 +1,12 @@
+- content_for :page_title do
+  = t('.title')
+
+= simple_form_for @custom_emoji, url: admin_custom_emojis_path do |f|
+  = render 'shared/error_messages', object: @custom_emoji
+
+  .fields-group
+    = f.input :shortcode, placeholder: t('admin.custom_emojis.shortcode'), hint: t('admin.custom_emojis.shortcode_hint')
+    = f.input :image, input_html: { accept: 'image/png' }, hint: t('admin.custom_emojis.image_hint')
+
+  .actions
+    = f.button :button, t('admin.custom_emojis.upload'), type: :submit