add 0.4.x compatibility when riding mod

api.lua

@@ -28,7 +28,7 @@ local use_cmi = minetest.global_exists("cmi")
 
 mobs = {
 	mod = "redo",
-	version = "20220120",
+	version = "20220205",
 	intllib = S,
 	invis = minetest.global_exists("invisibility") and invisibility or {}
 }
@@ -785,7 +785,7 @@ function mob_class:update_tag()
 	end
 
 	self.infotext = "Health: " .. self.health .. " / " .. self.hp_max
-		.. "\n" .. "Owner: " .. self.owner
+		.. (self.owner == "" and "" or "\n" .. "Owner: " .. self.owner)
 		.. text
 
 	-- set changes

depends.txt

@@ -8,3 +8,4 @@ lucky_block?
 cmi?
 toolranks?
 pathfinder?
+player_api?

mod.conf

@@ -1,4 +1,4 @@
 name = mobs
 depends =
-optional_depends = default, tnt, dye, farming, invisibility, intllib, lucky_block, cmi, toolranks, pathfinder
+optional_depends = default, tnt, dye, farming, invisibility, intllib, lucky_block, cmi, toolranks, pathfinder, player_api
 description = Adds a mob api for mods to add animals or monsters etc.

mount.lua

@@ -1,14 +1,16 @@
 -- lib_mount by Blert2112 (edited by TenPlus1)
 
+local is_50 = minetest.get_modpath("player_api") -- 5.x compatibility
+
 local abs, cos, floor, sin, sqrt, pi =
 		math.abs, math.cos, math.floor, math.sin, math.sqrt, math.pi
-------------------------------------------------------------------------------
 
 --
 -- Helper functions
 --
 
 local node_ok = function(pos, fallback)
+
 	fallback = fallback or mobs.fallback_node
 
 	local node = minetest.get_node_or_nil(pos)
@@ -46,6 +48,7 @@ end
 
 
 local function get_sign(i)
+
 	i = i or 0
 
 	if i == 0 then
@@ -57,6 +60,7 @@ end
 
 
 local function get_velocity(v, yaw, y)
+
 	local x = -sin(yaw) * v
 	local z =  cos(yaw) * v
 
@@ -71,6 +75,8 @@ end
 
 local function force_detach(player)
 
+	if not player then return end
+
 	local attached_to = player:get_attach()
 
 	if not attached_to then
@@ -85,19 +91,27 @@ local function force_detach(player)
 	end
 
 	player:set_detach()
-	player_api.player_attached[player:get_player_name()] = false
-	player:set_eye_offset({x = 0, y = 0, z = 0}, {x = 0, y = 0, z = 0})
-	player_api.set_animation(player, "stand", 30)
-	player:set_properties({visual_size = {x = 1, y = 1}})
 
+	local name = player:get_player_name()
+
+	if is_50 then
+		player_api.player_attached[name] = false
+		player_api.set_animation(player, "stand", 30)
+	else
+		default.player_attached[name] = false
+		default.player_set_animation(player, "stand", 30)
+	end
+
+	player:set_eye_offset({x = 0, y = 0, z = 0}, {x = 0, y = 0, z = 0})
+	player:set_properties({visual_size = {x = 1, y = 1}})
 end
 
--------------------------------------------------------------------------------
 
 minetest.register_on_leaveplayer(function(player)
 	force_detach(player)
 end)
 
+
 minetest.register_on_shutdown(function()
 
 	local players = minetest.get_connected_players()
@@ -107,12 +121,12 @@ minetest.register_on_shutdown(function()
 	end
 end)
 
+
 minetest.register_on_dieplayer(function(player)
 	force_detach(player)
 	return true
 end)
 
--------------------------------------------------------------------------------
 
 -- Just for correct detaching
 local function find_free_pos(pos)
@@ -147,7 +161,6 @@ local function find_free_pos(pos)
 	return pos
 end
 
--------------------------------------------------------------------------------
 
 function mobs.attach(entity, player)
 
@@ -169,8 +182,13 @@ function mobs.attach(entity, player)
 
 	force_detach(player)
 
-	player:set_attach(entity.object, "", attach_at, entity.player_rotation)
+	if is_50 then
 		player_api.player_attached[player:get_player_name()] = true
+	else
+		default.player_attached[player:get_player_name()] = true
+	end
+
+	player:set_attach(entity.object, "", attach_at, entity.player_rotation)
 	player:set_eye_offset(eye_offset, {x = 0, y = 0, z = 0})
 
 	player:set_properties({
@@ -183,7 +201,12 @@ function mobs.attach(entity, player)
 	minetest.after(0.2, function()
 
 		if player and player:is_player() then
+
+			if is_50 then
 				player_api.set_animation(player, "sit", 30)
+			else
+				default.player_set_animation(player, "sit", 30)
+			end
 		end
 	end)
 
@@ -192,6 +215,7 @@ end
 
 
 function mobs.detach(player)
+
 	force_detach(player)
 
 	minetest.after(0.1, function()
@@ -262,6 +286,7 @@ function mobs.drive(entity, moving_anim, stand_anim, can_fly, dtime)
 		entity.object:set_yaw(horz - entity.rotate)
 
 		if can_fly then
+
 			-- fly up
 			if ctrl.jump then
 
@@ -430,11 +455,12 @@ function mobs.fly(entity, _, speed, shoots, arrow, moving_anim, stand_anim)
 	local ctrl = entity.driver:get_player_control() ; if not ctrl then return end
 	local velo = entity.object:get_velocity()
 	local dir = entity.driver:get_look_dir()
-	local yaw = entity.driver:get_look_horizontal() + 1.57 -- offset fix between old and new commands
+	local yaw = entity.driver:get_look_horizontal() + 1.57
 
-if not ctrl or not velo then return end
+	if not ctrl or not velo then return end
 
 	if ctrl.up then
+
 		entity.object:set_velocity({
 			x = dir.x * speed,
 			y = dir.y * speed + 2,