From 0872a9161fe911e72b4f9873967058c0d479940d Mon Sep 17 00:00:00 2001
From: Luke aka SwissalpS <Luke@SwissalpS.ws>
Date: Thu, 11 Apr 2024 06:41:29 +0200
Subject: [PATCH 1/4] add hook for other mods

provide a way for other mods to decide where gliders are permited
---
 init.lua | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/init.lua b/init.lua
index 3953e5d..250527e 100644
--- a/init.lua
+++ b/init.lua
@@ -1,3 +1,4 @@
+hangglider = {}
 
 local has_player_monoids = minetest.get_modpath("player_monoids")
 local has_areas = minetest.get_modpath("areas")
@@ -73,6 +74,16 @@ local function remove_physics_overrides(player)
 	end
 end
 
+-- expose so other mods can override/hook-into
+-- to disallow flying in certain areas or materials
+-- such as on the moon or without priv in certain area
+-- pos: (vector) position of player
+-- name: (string) player's name
+-- in_flight: (bool) is already airborne
+function hangglider.allowed_to_fly(pos, name, in_flight) --luacheck: no unused args
+	return true
+end
+
 local function can_fly(pos, name)
 	if not enable_flak then
 		return true
@@ -156,6 +167,8 @@ local function hangglider_step(self, dtime)
 					shoot_flak_sound(pos)
 					gliding = false
 				end
+			elseif not hangglider.allowed_to_fly(pos, name, true) then
+				gliding = false
 			end
 			if not gliding then
 				remove_physics_overrides(player)
@@ -177,6 +190,9 @@ local function hangglider_use(stack, player)
 	local pos = player:get_pos()
 	local name = player:get_player_name()
 	if not hanggliding_players[name] then
+		if not hangglider.allowed_to_fly(pos, name, false)
+			return
+		end
 		minetest.sound_play("hanggliger_equip", {pos = pos, max_hear_distance = 8, gain = 1.0}, true)
 		local entity = minetest.add_entity(pos, "hangglider:glider")
 		if entity then

From 10d082c3bbea70bd719c20860b4a66b00697d815 Mon Sep 17 00:00:00 2001
From: Luke aka SwissalpS <Luke@SwissalpS.ws>
Date: Thu, 11 Apr 2024 06:47:13 +0200
Subject: [PATCH 2/4] rename can_fly() to friendly_airspace()

The name confused me over and over again. The function doesn't check flight-ability at all, it rather checks permission / friendlyness of area.

safe_node_below() does more of what 'can_fly' implies.
---
 init.lua | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/init.lua b/init.lua
index 250527e..c7ddf7e 100644
--- a/init.lua
+++ b/init.lua
@@ -84,7 +84,7 @@ function hangglider.allowed_to_fly(pos, name, in_flight) --luacheck: no unused a
 	return true
 end
 
-local function can_fly(pos, name)
+local function friendly_airspace(pos, name)
 	if not enable_flak then
 		return true
 	end
@@ -153,7 +153,7 @@ local function hangglider_step(self, dtime)
 					})
 				end
 			end
-			if not can_fly(pos, name) then
+			if not friendly_airspace(pos, name) then
 				if not self.flak_timer then
 					self.flak_timer = 0
 					shoot_flak_sound(pos)

From dcabbd6a5ef73bbf9d1a8c97c1f895026f308d19 Mon Sep 17 00:00:00 2001
From: Luke aka SwissalpS <Luke@SwissalpS.ws>
Date: Thu, 11 Apr 2024 06:53:08 +0200
Subject: [PATCH 3/4] oops

---
 init.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/init.lua b/init.lua
index c7ddf7e..bf9a1d1 100644
--- a/init.lua
+++ b/init.lua
@@ -190,7 +190,7 @@ local function hangglider_use(stack, player)
 	local pos = player:get_pos()
 	local name = player:get_player_name()
 	if not hanggliding_players[name] then
-		if not hangglider.allowed_to_fly(pos, name, false)
+		if not hangglider.allowed_to_fly(pos, name, false) then
 			return
 		end
 		minetest.sound_play("hanggliger_equip", {pos = pos, max_hear_distance = 8, gain = 1.0}, true)

From 40754ee74caf3bbbd0db6cd4c0a879f2fb3103bc Mon Sep 17 00:00:00 2001
From: Luke aka SwissalpS <Luke@SwissalpS.ws>
Date: Thu, 11 Apr 2024 06:57:28 +0200
Subject: [PATCH 4/4] Update .luacheckrc

---
 .luacheckrc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.luacheckrc b/.luacheckrc
index 1502aa3..74dfefb 100644
--- a/.luacheckrc
+++ b/.luacheckrc
@@ -1,5 +1,6 @@
 globals = {
 	"areas",
+	"hangglider",
 }
 
 read_globals = {