FEATURE: Filter reviewables by assigned user (#58)

assets/javascripts/discourse-assign/connectors/above-review-filters/assigned-to-filter.hbs

@@ -0,0 +1,16 @@
+ <div class='reviewable-filter discourse-assign-assign-to-filter'>
+  <label class='filter-label'>{{i18n "discourse_assign.assigned_to"}}</label>
+  {{user-selector
+    single=true
+    fullWidthWrap=true
+    allowAny=false
+    group="staff"
+    groupMembersOf=allowedGroups
+    excludeCurrentUser=false
+    includeMentionableGroups=false
+    hasGroups=false
+    usernames=additionalFilters.assigned_to
+    placeholderKey=placeholderKey
+    autocomplete="off"
+  }}
+ </div>

assets/javascripts/discourse-assign/connectors/above-review-filters/assigned-to-filter.js.es6

@@ -0,0 +1,13 @@
+export default {
+  shouldRender(args) {
+    return args.additionalFilters;
+  },
+
+  setupComponent(args, component) {
+    const groupIDs = component.siteSettings.assign_allowed_on_groups.split("|");
+    const groupNames = this.site.groups
+      .filter(group => groupIDs.includes(group.id.toString()))
+      .map(group => group.name);
+    component.set("allowedGroups", groupNames);
+  }
+};

plugin.rb

@@ -268,6 +268,27 @@ after_initialize do
     id && id.to_i rescue nil
   end
 
+  # TODO: Remove this when 2.4 becomes the new stable
+  if self.respond_to?(:add_custom_reviewable_filter)
+    add_custom_reviewable_filter(
+      [
+        :assigned_to,
+        Proc.new do |results, value|
+          results.joins(<<~SQL
+            INNER JOIN posts p ON p.id = target_id
+            INNER JOIN topics t ON t.id = p.topic_id
+            INNER JOIN topic_custom_fields tcf ON tcf.topic_id = t.id
+            INNER JOIN users u ON u.id = tcf.value::integer
+          SQL
+          )
+          .where(target_type: Post.name)
+          .where('tcf.name = ?', TopicAssigner::ASSIGNED_TO_ID)
+          .where('u.username = ?', value)
+        end
+      ]
+    )
+  end
+
   on(:post_created) do |post|
     ::TopicAssigner.auto_assign(post, force: true)
   end