From 6b407872b402b72dba48bece5fa69ca5af54f2f0 Mon Sep 17 00:00:00 2001
From: "Haelwenn (lanodan) Monnier" <contact@hacktivis.me>
Date: Mon, 25 Mar 2019 22:19:57 +0100
Subject: mastodon_api_controller.ex: Use min_id in link header instead of
 since_id

---
 .../web/mastodon_api/mastodon_api_controller.ex     | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

(limited to 'lib')

diff --git a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
index 4d0caecf4..5cc19e68f 100644
--- a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
+++ b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
@@ -199,15 +199,20 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
   defp add_link_headers(conn, method, activities, param \\ nil, params \\ %{}) do
     params =
       conn.params
-      |> Map.drop(["since_id", "max_id"])
+      |> Map.drop(["since_id", "max_id", "min_id"])
       |> Map.merge(params)
 
     last = List.last(activities)
-    first = List.first(activities)
 
     if last do
-      min = last.id
-      max = first.id
+      max_id = last.id
+
+      limit =
+        params
+        |> Map.get("limit", "20")
+        |> String.to_integer()
+
+      min_id = Enum.at(activities, limit * -1)
 
       {next_url, prev_url} =
         if param do
@@ -216,13 +221,13 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
               Pleroma.Web.Endpoint,
               method,
               param,
-              Map.merge(params, %{max_id: min})
+              Map.merge(params, %{max_id: max_id})
             ),
             mastodon_api_url(
               Pleroma.Web.Endpoint,
               method,
               param,
-              Map.merge(params, %{since_id: max})
+              Map.merge(params, %{min_id: min_id})
             )
           }
         else
@@ -230,12 +235,12 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
             mastodon_api_url(
               Pleroma.Web.Endpoint,
               method,
-              Map.merge(params, %{max_id: min})
+              Map.merge(params, %{max_id: max_id})
             ),
             mastodon_api_url(
               Pleroma.Web.Endpoint,
               method,
-              Map.merge(params, %{since_id: max})
+              Map.merge(params, %{min_id: min_id})
             )
           }
         end
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