Add ability to filter individual posts (#18945)

* Add database table for status-specific filters

* Add REST endpoints, entities and attributes

* Show status filters in /filters interface

* Perform server-side filtering for individual posts filters

* Fix filtering on context mismatch

* Refactor `toServerSideType` by moving it to its own module

* Move loupe and delete icons to their own module

* Add ability to filter individual posts from WebUI

* Replace keyword list by warnings (expired, context mismatch)

* Refactor server-side filtering code

* Add tests

4 files changed, 91 insertions, 0 deletions

diff --git a/app/views/filters/_filter.html.haml b/app/views/filters/_filter.html.haml
index 2ab014081..9993ad2ee 100644
--- a/app/views/filters/_filter.html.haml
+++ b/app/views/filters/_filter.html.haml
@@ -22,6 +22,15 @@
               - keywords = filter.keywords.map(&:keyword)
               - keywords = keywords.take(5) + ['…'] if keywords.size > 5 # TODO
               = keywords.join(', ')
+      - unless filter.statuses.empty?
+        %li.permissions-list__item
+          .permissions-list__item__icon
+            = fa_icon('comment')
+          .permissions-list__item__text
+            .permissions-list__item__text__title
+              = t('filters.index.statuses', count: filter.statuses.size)
+            .permissions-list__item__text__type
+              = t('filters.index.statuses_long', count: filter.statuses.size)
 
   .announcements-list__item__action-bar
     .announcements-list__item__meta
diff --git a/app/views/filters/_filter_fields.html.haml b/app/views/filters/_filter_fields.html.haml
index 1a52faa7a..c58978f5a 100644
--- a/app/views/filters/_filter_fields.html.haml
+++ b/app/views/filters/_filter_fields.html.haml
@@ -14,6 +14,13 @@
 
 %hr.spacer/
 
+- unless f.object.statuses.empty?
+  %h4= t('filters.edit.statuses')
+
+  %p.muted-hint= t('filters.edit.statuses_hint_html', path: filter_statuses_path(f.object))
+
+  %hr.spacer/
+
 %h4= t('filters.edit.keywords')
 
 .table-wrapper
diff --git a/app/views/filters/statuses/_status_filter.html.haml b/app/views/filters/statuses/_status_filter.html.haml
new file mode 100644
index 000000000..ba1170cf9
--- /dev/null
+++ b/app/views/filters/statuses/_status_filter.html.haml
@@ -0,0 +1,37 @@
+- status = status_filter.status.proper
+
+.batch-table__row
+  %label.batch-table__row__select.batch-checkbox
+    = f.check_box :status_filter_ids, { multiple: true, include_hidden: false }, status_filter.id
+  .batch-table__row__content
+    .status__content><
+      - if status.spoiler_text.blank?
+        = prerender_custom_emojis(status_content_format(status), status.emojis)
+      - else
+        %details<
+          %summary><
+            %strong> Content warning: #{prerender_custom_emojis(h(status.spoiler_text), status.emojis)}
+          = prerender_custom_emojis(status_content_format(status), status.emojis)
+
+    - status.ordered_media_attachments.each do |media_attachment|
+      %abbr{ title: media_attachment.description }
+        = fa_icon 'link'
+        = media_attachment.file_file_name
+
+    .detailed-status__meta
+      = link_to ActivityPub::TagManager.instance.url_for(status.account), class: 'name-tag', target: '_blank', rel: 'noopener noreferrer' do
+        = image_tag(status.account.avatar.url, width: 15, height: 15, alt: display_name(status.account), class: 'avatar')
+        .username= status.account.acct
+      ·
+      = link_to ActivityPub::TagManager.instance.url_for(status), class: 'detailed-status__datetime', target: stream_link_target, rel: 'noopener noreferrer' do
+        %time.formatted{ datetime: status.created_at.iso8601, title: l(status.created_at) }= l(status.created_at)
+      - if status.edited?
+        ·
+        = t('statuses.edited_at_html', date: content_tag(:time, l(status.edited_at), datetime: status.edited_at.iso8601, title: l(status.edited_at), class: 'formatted'))
+      ·
+      = fa_visibility_icon(status)
+      = t("statuses.visibilities.#{status.visibility}")
+      - if status.sensitive?
+        ·
+        = fa_icon('eye-slash fw')
+        = t('stream_entries.sensitive_content')
diff --git a/app/views/filters/statuses/index.html.haml b/app/views/filters/statuses/index.html.haml
new file mode 100644
index 000000000..886de58fa
--- /dev/null
+++ b/app/views/filters/statuses/index.html.haml
@@ -0,0 +1,38 @@
+- content_for :header_tags do
+  = javascript_pack_tag 'admin', async: true, crossorigin: 'anonymous'
+
+- content_for :page_title do
+  = t('filters.statuses.index.title')
+  \-
+  = @filter.title
+
+.filters
+  .back-link
+    = link_to edit_filter_path(@filter) do
+      = fa_icon 'chevron-left fw'
+      = t('filters.statuses.back_to_filter')
+
+%p.hint= t('filters.statuses.index.hint')
+
+%hr.spacer/
+
+= form_for(@status_filter_batch_action, url: batch_filter_statuses_path(@filter.id)) do |f|
+  = hidden_field_tag :page, params[:page] || 1
+
+  - Admin::StatusFilter::KEYS.each do |key|
+    = hidden_field_tag key, params[key] if params[key].present?
+
+  .batch-table
+    .batch-table__toolbar
+      %label.batch-table__toolbar__select.batch-checkbox-all
+        = check_box_tag :batch_checkbox_all, nil, false
+      .batch-table__toolbar__actions
+        - unless @status_filters.empty?
+          = f.button safe_join([fa_icon('times'), t('filters.statuses.batch.remove')]), name: :remove, class: 'table-action-link', type: :submit
+    .batch-table__body
+      - if @status_filters.empty?
+        = nothing_here 'nothing-here--under-tabs'
+      - else
+        = render partial: 'status_filter', collection: @status_filters, locals: { f: f }
+
+= paginate @status_filters