Support min_id-based pagination in REST API (#8736)

* Allow min_id pagination in Feed#get

* Add min_id pagination to home and list timeline APIs

* Add min_id pagination to account statuses, public and tag APIs

* Remove unused stub in reports API

* Use min_id pagination in notifications, favourites, and fix order

* Fix HomeFeed#from_database not using paginate_by_id

3 files changed, 22 insertions, 10 deletions

diff --git a/app/models/concerns/paginable.rb b/app/models/concerns/paginable.rb
index 66695677e..52f186918 100644
--- a/app/models/concerns/paginable.rb
+++ b/app/models/concerns/paginable.rb
@@ -19,5 +19,13 @@ module Paginable
       query = query.where(arel_table[:id].gt(min_id)) if min_id.present?
       query
     }
+
+    scope :paginate_by_id, ->(limit, **options) {
+      if options[:min_id].present?
+        paginate_by_min_id(limit, options[:min_id]).reverse
+      else
+        paginate_by_max_id(limit, options[:max_id], options[:since_id])
+      end
+    }
   end
 end
diff --git a/app/models/feed.rb b/app/models/feed.rb
index d99f1ffb2..5bce88f25 100644
--- a/app/models/feed.rb
+++ b/app/models/feed.rb
@@ -6,16 +6,20 @@ class Feed
     @id   = id
   end
 
-  def get(limit, max_id = nil, since_id = nil)
-    from_redis(limit, max_id, since_id)
+  def get(limit, max_id = nil, since_id = nil, min_id = nil)
+    from_redis(limit, max_id, since_id, min_id)
   end
 
   protected
 
-  def from_redis(limit, max_id, since_id)
-    max_id     = '+inf' if max_id.blank?
-    since_id   = '-inf' if since_id.blank?
-    unhydrated = redis.zrevrangebyscore(key, "(#{max_id}", "(#{since_id}", limit: [0, limit], with_scores: true).map(&:first).map(&:to_i)
+  def from_redis(limit, max_id, since_id, min_id)
+    if min_id.blank?
+      max_id     = '+inf' if max_id.blank?
+      since_id   = '-inf' if since_id.blank?
+      unhydrated = redis.zrevrangebyscore(key, "(#{max_id}", "(#{since_id}", limit: [0, limit], with_scores: true).map(&:first).map(&:to_i)
+    else
+      unhydrated = redis.zrangebyscore(key, "(#{min_id}", '+inf', limit: [0, limit], with_scores: true).map(&:first).map(&:to_i)
+    end
 
     Status.where(id: unhydrated).cache_ids
   end
diff --git a/app/models/home_feed.rb b/app/models/home_feed.rb
index b943a34ce..ba7564983 100644
--- a/app/models/home_feed.rb
+++ b/app/models/home_feed.rb
@@ -7,9 +7,9 @@ class HomeFeed < Feed
     @account = account
   end
 
-  def get(limit, max_id = nil, since_id = nil)
+  def get(limit, max_id = nil, since_id = nil, min_id = nil)
     if redis.exists("account:#{@account.id}:regeneration")
-      from_database(limit, max_id, since_id)
+      from_database(limit, max_id, since_id, min_id)
     else
       super
     end
@@ -17,9 +17,9 @@ class HomeFeed < Feed
 
   private
 
-  def from_database(limit, max_id, since_id)
+  def from_database(limit, max_id, since_id, min_id)
     Status.as_home_timeline(@account)
-          .paginate_by_max_id(limit, max_id, since_id)
+          .paginate_by_id(limit, max_id: max_id, since_id: since_id, min_id: min_id)
           .reject { |status| FeedManager.instance.filter?(:home, status, @account.id) }
   end
 end