API for blocking and unblocking

app/services/block_service.rb

@@ -0,0 +1,25 @@
+class BlockService < BaseService
+  def call(account, target_account)
+    return if account.id == target_account.id
+
+    UnfollowService.new.call(account, target_account) if account.following?(target_account)
+    account.block!(target_account)
+    clear_mentions(account, target_account)
+  end
+
+  private
+
+  def clear_mentions(account, target_account)
+    timeline_key = FeedManager.instance.key(:mentions, account.id)
+
+    target_account.statuses.select('id').find_each do |status|
+      redis.zrem(timeline_key, status.id)
+    end
+
+    FeedManager.instance.broadcast(account.id, type: 'block', id: target_account.id)
+  end
+
+  def redis
+    $redis
+  end
+end