Epic/mods/sethome/init.lua

-- sethome/init.lua

sethome = {}

-- Load support for MT game translation.
local S = minetest.get_translator("sethome")


local homes_file = minetest.get_worldpath() .. "/homes"
local homepos = {}

local function loadhomes()
   local input = io.open(homes_file, "r")
   if not input then
      return -- no longer an error
   end

   -- Iterate over all stored positions in the format "x y z player" for each line
   for pos, name in input:read("*a"):gmatch("(%S+ %S+ %S+)%s([%w_-]+)[\r\n]") do
      homepos[name] = minetest.string_to_pos(pos)
   end
   input:close()
end

loadhomes()

sethome.set = function(name, pos)
   local player = minetest.get_player_by_name(name)
   if not player or not pos then
      return false
   end
   player:set_attribute("sethome:home", minetest.pos_to_string(pos))

   -- remove `name` from the old storage file
   local data = {}
   local output = io.open(homes_file, "w")
   if output then
      homepos[name] = nil
      for i, v in pairs(homepos) do
         table.insert(data, string.format("%.1f %.1f %.1f %s\n", v.x, v.y, v.z, i))
      end
      output:write(table.concat(data))
      io.close(output)
      return true
   end
   return true -- if the file doesn't exist - don't return an error.
end

sethome.get = function(name)
   local player = minetest.get_player_by_name(name)
   local pos = minetest.string_to_pos(player:get_attribute("sethome:home"))
   if pos then
      return pos
   end

   -- fetch old entry from storage table
   pos = homepos[name]
   if pos then
      return vector.new(pos)
   else
      return nil
   end
end

sethome.go = function(name)
   local pos = sethome.get(name)
   local player = minetest.get_player_by_name(name)
   if player and pos then
      player:set_pos(pos)
      return true
   end
   return false
end

minetest.register_privilege("home", {
   description = S("Can use /sethome and /home"),
   give_to_singleplayer = false
})

minetest.register_chatcommand("home", {
   description = S("Teleport you to your home point"),
   privs = {home = true},
   func = function(name)
      if sethome.go(name) then
         return true, S("Teleported to home!")
      end
      return false, S("Set a home using /sethome")
   end,
})

minetest.register_chatcommand("sethome", {
   description = S("Set your home point"),
   privs = {home = true},
   func = function(name)
      name = name or "" -- fallback to blank name if nil
      local player = minetest.get_player_by_name(name)
      local pos = player:get_pos()
      if minetest.is_protected(pos, name) then
         return false, S("Could not set home!")
      else
         if player and sethome.set(name, player:get_pos()) then
            return true, S("Home set!")
         end
      end
   end,
})