add only has more to pagination option

lib/scrivener/paginater/ecto/query.ex

@@ -1,16 +1,18 @@
 defimpl Scrivener.Paginater, for: Ecto.Query do
   import Ecto.Query
 
-  alias Scrivener.{Config, Page}
+  alias Scrivener.{Config, Page, SimplePage}
 
   @moduledoc false
 
-  @spec paginate(Ecto.Query.t(), Scrivener.Config.t()) :: Scrivener.Page.t()
+  @spec paginate(Ecto.Query.t(), Scrivener.Config.t()) ::
+          Scrivener.Page.t() | Scrivener.SimplePage.t()
   def paginate(query, %Config{
-        page_size: page_size,
-        page_number: page_number,
+        page_type: :normal,
         module: repo,
         caller: caller,
+        page_number: page_number,
+        page_size: page_size,
         options: options
       }) do
     total_entries =
@@ -26,25 +28,59 @@ defimpl Scrivener.Paginater, for: Ecto.Query do
     page_number =
       if allow_overflow_page_number, do: page_number, else: min(total_pages, page_number)
 
+    entries =
+      if page_number > total_pages,
+        do: [],
+        else: entries(query, repo, page_number, page_size, options)
+
     %Page{
       page_size: page_size,
       page_number: page_number,
-      entries: entries(query, repo, page_number, total_pages, page_size, options),
+      entries: entries,
       total_entries: total_entries,
       total_pages: total_pages
     }
   end
 
-  defp entries(_query, _repo, page_number, total_pages, _page_size, _options)
-       when page_number > total_pages,
-       do: []
+  def paginate(query, %Config{
+        page_type: :simple,
+        module: repo,
+        page_number: page_number,
+        page_size: page_size,
+        options: options
+      }) do
+    entries_with_maybe_one_extra =
+      entries(query, repo, page_number, page_size, options, extra_entry_size: 1)
+
+    {entries, has_more} =
+      if length(entries_with_maybe_one_extra) > page_size do
+        entries =
+          entries_with_maybe_one_extra
+          |> Enum.reverse()
+          |> tl()
+          |> Enum.reverse()
+
+        {entries, true}
+      else
+        {entries_with_maybe_one_extra, false}
+      end
+
+    %SimplePage{
+      page_size: page_size,
+      page_number: page_number,
+      entries: entries,
+      has_more: has_more
+    }
+  end
 
-  defp entries(query, repo, page_number, _total_pages, page_size, options) do
+  defp entries(query, repo, page_number, page_size, options, opts \\ []) do
+    extra_entry_size = Keyword.get(opts, :extra_entry_size, 0)
     offset = Keyword.get_lazy(options, :offset, fn -> page_size * (page_number - 1) end)
+    limit = page_size + extra_entry_size
 
     query
     |> offset(^offset)
-    |> limit(^page_size)
+    |> limit(^limit)
     |> repo.all(options)
   end
 

mix.exs

@@ -38,7 +38,8 @@ defmodule Scrivener.Ecto.Mixfile do
 
   defp deps do
     [
-      {:scrivener, "~> 2.4"},
+      {:scrivener,
+       github: "RiverFinancial/scrivener", ref: "e21e9e83b4e101d2e3b5e24acb29289708746dac"},
       {:ecto, "~> 3.12"},
       {:ecto_sql, "~> 3.12", only: :test},
       {:dialyxir, "~> 1.0", only: :dev},

mix.lock

@@ -14,6 +14,6 @@
   "makeup_erlang": {:hex, :makeup_erlang, "1.0.1", "c7f58c120b2b5aa5fd80d540a89fdf866ed42f1f3994e4fe189abebeab610839", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "8a89a1eeccc2d798d6ea15496a6e4870b75e014d1af514b1b71fa33134f57814"},
   "nimble_parsec": {:hex, :nimble_parsec, "1.4.0", "51f9b613ea62cfa97b25ccc2c1b4216e81df970acd8e16e8d1bdc58fef21370d", [:mix], [], "hexpm", "9c565862810fb383e9838c1dd2d7d2c437b3d13b267414ba6af33e50d2d1cf28"},
   "postgrex": {:hex, :postgrex, "0.19.1", "73b498508b69aded53907fe48a1fee811be34cc720e69ef4ccd568c8715495ea", [:mix], [{:db_connection, "~> 2.1", [hex: :db_connection, repo: "hexpm", optional: false]}, {:decimal, "~> 1.5 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:table, "~> 0.1.0", [hex: :table, repo: "hexpm", optional: true]}], "hexpm", "8bac7885a18f381e091ec6caf41bda7bb8c77912bb0e9285212829afe5d8a8f8"},
-  "scrivener": {:hex, :scrivener, "2.7.2", "1d913c965ec352650a7f864ad7fd8d80462f76a32f33d57d1e48bc5e9d40aba2", [:mix], [], "hexpm", "7866a0ec4d40274efbee1db8bead13a995ea4926ecd8203345af8f90d2b620d9"},
+  "scrivener": {:git, "https://github.com/RiverFinancial/scrivener.git", "e21e9e83b4e101d2e3b5e24acb29289708746dac", [ref: "e21e9e83b4e101d2e3b5e24acb29289708746dac"]},
   "telemetry": {:hex, :telemetry, "1.3.0", "fedebbae410d715cf8e7062c96a1ef32ec22e764197f70cda73d82778d61e7a2", [:rebar3], [], "hexpm", "7015fc8919dbe63764f4b4b87a95b7c0996bd539e0d499be6ec9d7f3875b79e6"},
 }