1 files changed, 80 insertions, 0 deletions
diff --git a/builtin/client/util.lua b/builtin/client/util.lua
new file mode 100644
index 000000000..440f99ebc
--- /dev/null
+++ b/builtin/client/util.lua
@@ -0,0 +1,80 @@
+function core.parse_pos(param)
+	local p = {}
+	local playerpos = core.localplayer:get_pos()
+	p.x, p.y, p.z = string.match(param, "^([~|%d.-]+)[, ] *([~|%d.-]+)[, ] *([~|%d.-]+)$")
+	for k, v in pairs(p) do
+		if p[k] == "~" then
+			p[k] = playerpos[k]
+		else
+			p[k] = tonumber(v)
+		end
+	end
+	if p.x and p.y and p.z then
+		return true, vector.round(p)
+	end
+	return false, "Invalid position (" .. param .. ")"
+end
+
+function core.parse_relative_pos(param)
+	local success, pos = core.parse_pos(param:gsub("~", "0"))
+	if success then pos = vector.round(vector.add(core.localplayer:get_pos(), pos)) end
+	return success, pos
+end
+
+function core.find_item(item, mini, maxi)
+	for index, stack in ipairs(core.get_inventory("current_player").main) do
+		if (not mini or index >= mini) and (not maxi or index <= maxi) and stack:get_name() == item then
+			return index
+		end
+	end
+end
+
+function core.switch_to_item(item)
+	local i = core.find_item(item)
+	if i then
+		core.localplayer:set_wield_index(i)
+		return true
+	else
+		return false
+	end
+end
+
+function core.get_pointed_thing()
+	local pos = core.camera:get_pos()
+	local pos2 = vector.add(pos, vector.multiply(core.camera:get_look_dir(), 7))
+	local player = core.localplayer
+	if not player then return end
+	local item = player:get_wielded_item()
+	if not item then return end
+	local def = core.get_item_def(item:get_name())
+	local ray = core.raycast(pos, pos2, true, core.settings:get_bool("point_liquids") or def and def.liquids_pointable)
+	return ray and ray:next()
+end
+
+function core.close_formspec(formname)
+	return core.show_formspec(formname, "")
+end
+
+function core.get_nearby_objects(radius)
+	return core.get_objects_inside_radius(core.localplayer:get_pos(), radius)
+end
+
+-- HTTP callback interface
+
+function core.http_add_fetch(httpenv)
+	httpenv.fetch = function(req, callback)
+		local handle = httpenv.fetch_async(req)
+
+		local function update_http_status()
+			local res = httpenv.fetch_async_get(handle)
+			if res.completed then
+				callback(res)
+			else
+				core.after(0, update_http_status)
+			end
+		end
+		core.after(0, update_http_status)
+	end
+
+	return httpenv
+end