FEATURE: New site setting `min_flags_staff_visibility`

When set higher than 1, flags won't show up for staff in the admin
section unless the minimum threshold of flags on a post is reached.

app/models/post_action.rb

@@ -52,13 +52,22 @@ class PostAction < ActiveRecord::Base
   end
 
   def self.update_flagged_posts_count
-    posts_flagged_count = PostAction.active
+    flagged_relation = PostAction.active
       .flags
       .joins(post: :topic)
       .where('posts.deleted_at' => nil)
       .where('topics.deleted_at' => nil)
       .where('posts.user_id > 0')
-      .count('DISTINCT posts.id')
+      .group("posts.id")
+
+    if SiteSetting.min_flags_staff_visibility > 1
+      flagged_relation = flagged_relation
+        .having("count(*) >= ?", SiteSetting.min_flags_staff_visibility)
+    end
+
+    posts_flagged_count = flagged_relation
+      .pluck("posts.id")
+      .count
 
     $redis.set('posts_flagged_count', posts_flagged_count)
     user_ids = User.staff.pluck(:id)

config/locales/server.en.yml

@@ -1473,6 +1473,7 @@ en:
     auto_silence_fast_typers_max_trust_level: "Maximum trust level to auto silence fast typers"
     auto_silence_first_post_regex: "Case insensitive regex that if passed will cause first post by user to be silenced and sent to approval queue. Example: raging|a[bc]a , will cause all posts containing raging or aba or aca to be silenced on first. Only applies to first post."
     flags_default_topics: "Show flagged topics by default in the admin section"
+    min_flags_staff_visibility: "The minimum amount of flags on a post must have before staff can see it in the admin section"
 
     reply_by_email_enabled: "Enable replying to topics via email."
     reply_by_email_address: "Template for reply by email incoming email address, for example: %{reply_key}@reply.example.com or replies+%{reply_key}@example.com"

config/site_settings.yml

@@ -1096,6 +1096,7 @@ spam:
   flags_default_topics:
     default: false
     client: true
+  min_flags_staff_visibility: 1
 
 rate_limits:
   unique_posts_mins: 5

lib/flag_query.rb

@@ -21,12 +21,16 @@ module FlagQuery
 
     total_rows = actions.count
 
-    post_ids = actions.limit(per_page)
+    post_ids_relation = actions.limit(per_page)
       .offset(offset)
       .group(:post_id)
       .order('MIN(post_actions.created_at) DESC')
-      .pluck(:post_id)
-      .uniq
+
+    if opts[:filter] != "old" && SiteSetting.min_flags_staff_visibility > 1
+      post_ids_relation = post_ids_relation.having("count(*) >= ?", SiteSetting.min_flags_staff_visibility)
+    end
+
+    post_ids = post_ids_relation.pluck(:post_id).uniq
 
     posts = SqlBuilder.new("
       SELECT p.id,
@@ -182,18 +186,25 @@ module FlagQuery
     ft_by_id = {}
     users_by_id = {}
     topics_by_id = {}
+    counts_by_post = {}
 
     results.each do |pa|
       if pa.post.present? && pa.post.topic.present?
-        ft = ft_by_id[pa.post.topic.id] ||= OpenStruct.new(
+        topic_id = pa.post.topic.id
+
+        ft = ft_by_id[topic_id] ||= OpenStruct.new(
           topic: pa.post.topic,
           flag_counts: {},
           user_ids: [],
-          last_flag_at: pa.created_at
+          last_flag_at: pa.created_at,
+          meets_minimum: false
         )
 
-        topics_by_id[pa.post.topic.id] = pa.post.topic
+        counts_by_post[pa.post.id] ||= 0
+        sum = counts_by_post[pa.post.id] += 1
+        ft.meets_minimum = true if sum >= SiteSetting.min_flags_staff_visibility
 
+        topics_by_id[topic_id] = pa.post.topic
         ft.flag_counts[pa.post_action_type_id] ||= 0
         ft.flag_counts[pa.post_action_type_id] += 1
 
@@ -204,9 +215,11 @@ module FlagQuery
       end
     end
 
+    flagged_topics = ft_by_id.values.select { |ft| ft.meets_minimum }
+
     Topic.preload_custom_fields(topics_by_id.values, TopicList.preloaded_custom_fields)
 
-    { flagged_topics: ft_by_id.values, users: users_by_id.values }
+    { flagged_topics: flagged_topics, users: users_by_id.values }
   end
 
   private

spec/components/flag_query_spec.rb

@@ -5,6 +5,41 @@ describe FlagQuery do
 
   let(:codinghorror) { Fabricate(:coding_horror) }
 
+  describe "flagged_topics" do
+    it "respects `min_flags_staff_visibility`" do
+      admin = Fabricate(:admin)
+      moderator = Fabricate(:moderator)
+
+      post = create_post
+
+      PostAction.act(moderator, post, PostActionType.types[:spam])
+
+      SiteSetting.min_flags_staff_visibility = 1
+
+      result = FlagQuery.flagged_topics
+      expect(result[:flagged_topics]).to be_present
+      ft = result[:flagged_topics].first
+      expect(ft.topic).to eq(post.topic)
+      expect(ft.flag_counts).to eq(PostActionType.types[:spam] => 1)
+
+      SiteSetting.min_flags_staff_visibility = 2
+
+      result = FlagQuery.flagged_topics
+      expect(result[:flagged_topics]).to be_blank
+
+      PostAction.act(admin, post, PostActionType.types[:inappropriate])
+      result = FlagQuery.flagged_topics
+      expect(result[:flagged_topics]).to be_present
+      ft = result[:flagged_topics].first
+      expect(ft.topic).to eq(post.topic)
+      expect(ft.flag_counts).to eq(
+        PostActionType.types[:spam] => 1,
+        PostActionType.types[:inappropriate] => 1
+      )
+    end
+
+  end
+
   describe "flagged_posts_report" do
     it "does not return flags on system posts" do
       admin = Fabricate(:admin)
@@ -75,7 +110,27 @@ describe FlagQuery do
       posts, users = FlagQuery.flagged_posts_report(moderator)
 
       expect(posts.count).to eq(1)
+    end
 
+    it "respects `min_flags_staff_visibility`" do
+      admin = Fabricate(:admin)
+      moderator = Fabricate(:moderator)
+
+      post = create_post
+
+      PostAction.act(moderator, post, PostActionType.types[:spam])
+
+      SiteSetting.min_flags_staff_visibility = 2
+      posts, topics, users = FlagQuery.flagged_posts_report(admin)
+      expect(posts).to be_blank
+      expect(topics).to be_blank
+      expect(users).to be_blank
+
+      PostAction.act(admin, post, PostActionType.types[:inappropriate])
+      posts, topics, users = FlagQuery.flagged_posts_report(admin)
+      expect(posts).to be_present
+      expect(topics).to be_present
+      expect(users).to be_present
     end
 
   end

spec/models/post_action_spec.rb

@@ -141,6 +141,17 @@ describe PostAction do
       expect(PostAction.flagged_posts_count).to eq(0)
     end
 
+    it "respects min_flags_staff_visibility" do
+      SiteSetting.min_flags_staff_visibility = 2
+      expect(PostAction.flagged_posts_count).to eq(0)
+
+      PostAction.act(codinghorror, post, PostActionType.types[:off_topic])
+      expect(PostAction.flagged_posts_count).to eq(0)
+
+      PostAction.act(eviltrout, post, PostActionType.types[:off_topic])
+      expect(PostAction.flagged_posts_count).to eq(1)
+    end
+
     it "should reset counts when a topic is deleted" do
       PostAction.act(codinghorror, post, PostActionType.types[:off_topic])
       post.topic.trash!