minetest/builtin/mainmenu/serverlistmgr.lua

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--Minetest
--Copyright (C) 2020 rubenwardy
--
--This program is free software; you can redistribute it and/or modify
--it under the terms of the GNU Lesser General Public License as published by
--the Free Software Foundation; either version 2.1 of the License, or
--(at your option) any later version.
--
--This program is distributed in the hope that it will be useful,
--but WITHOUT ANY WARRANTY; without even the implied warranty of
--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
--GNU Lesser General Public License for more details.
--
--You should have received a copy of the GNU Lesser General Public License along
--with this program; if not, write to the Free Software Foundation, Inc.,
--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
serverlistmgr = {}
--------------------------------------------------------------------------------
local function order_server_list(list)
local res = {}
--orders the favorite list after support
for i = 1, #list do
local fav = list[i]
if is_server_protocol_compat(fav.proto_min, fav.proto_max) then
res[#res + 1] = fav
end
end
for i = 1, #list do
local fav = list[i]
if not is_server_protocol_compat(fav.proto_min, fav.proto_max) then
res[#res + 1] = fav
end
end
return res
end
local public_downloading = false
--------------------------------------------------------------------------------
function serverlistmgr.sync()
if not serverlistmgr.servers then
serverlistmgr.servers = {{
name = fgettext("Loading..."),
description = fgettext_ne("Try reenabling public serverlist and check your internet connection.")
}}
end
local serverlist_url = core.settings:get("serverlist_url") or ""
if not core.get_http_api or serverlist_url == "" then
serverlistmgr.servers = {{
name = fgettext("Public server list is disabled"),
description = ""
}}
return
end
if public_downloading then
return
end
public_downloading = true
core.handle_async(
function(param)
local http = core.get_http_api()
local url = ("%s/list?proto_version_min=%d&proto_version_max=%d"):format(
core.settings:get("serverlist_url"),
core.get_min_supp_proto(),
core.get_max_supp_proto())
local response = http.fetch_sync({ url = url })
if not response.succeeded then
return {}
end
local retval = core.parse_json(response.data)
return retval and retval.list or {}
end,
nil,
function(result)
public_downloading = nil
local favs = order_server_list(result)
if favs[1] then
serverlistmgr.servers = favs
end
core.event_handler("Refresh")
end
)
end
--------------------------------------------------------------------------------
local function get_favorites_path()
local base = core.get_user_path() .. DIR_DELIM .. "client" .. DIR_DELIM .. "serverlist" .. DIR_DELIM
return base .. core.settings:get("serverlist_file")
end
--------------------------------------------------------------------------------
local function save_favorites(favorites)
local filename = core.settings:get("serverlist_file")
-- If setting specifies legacy format change the filename to the new one
if filename:sub(#filename - 3):lower() == ".txt" then
core.settings:set("serverlist_file", filename:sub(1, #filename - 4) .. ".json")
end
local path = get_favorites_path()
core.create_dir(path)
core.safe_file_write(path, core.write_json(favorites))
end
--------------------------------------------------------------------------------
function serverlistmgr.read_legacy_favorites(path)
local file = io.open(path, "r")
if not file then
return nil
end
local lines = {}
for line in file:lines() do
lines[#lines + 1] = line
end
file:close()
local favorites = {}
local i = 1
while i < #lines do
local function pop()
local line = lines[i]
i = i + 1
return line and line:trim()
end
if pop():lower() == "[server]" then
local name = pop()
local address = pop()
local port = tonumber(pop())
local description = pop()
if name == "" then
name = nil
end
if description == "" then
description = nil
end
if not address or #address < 3 then
core.log("warning", "Malformed favorites file, missing address at line " .. i)
elseif not port or port < 1 or port > 65535 then
core.log("warning", "Malformed favorites file, missing port at line " .. i)
elseif (name and name:upper() == "[SERVER]") or
(address and address:upper() == "[SERVER]") or
(description and description:upper() == "[SERVER]") then
core.log("warning", "Potentially malformed favorites file, overran at line " .. i)
else
favorites[#favorites + 1] = {
name = name,
address = address,
port = port,
description = description
}
end
end
end
return favorites
end
--------------------------------------------------------------------------------
local function read_favorites()
local path = get_favorites_path()
-- If new format configured fall back to reading the legacy file
if path:sub(#path - 4):lower() == ".json" then
local file = io.open(path, "r")
if file then
local json = file:read("*all")
file:close()
return core.parse_json(json)
end
path = path:sub(1, #path - 5) .. ".txt"
end
local favs = serverlistmgr.read_legacy_favorites(path)
if favs then
save_favorites(favs)
os.remove(path)
end
return favs
end
--------------------------------------------------------------------------------
local function delete_favorite(favorites, del_favorite)
for i=1, #favorites do
local fav = favorites[i]
if fav.address == del_favorite.address and fav.port == del_favorite.port then
table.remove(favorites, i)
return
end
end
end
--------------------------------------------------------------------------------
function serverlistmgr.get_favorites()
if serverlistmgr.favorites then
return serverlistmgr.favorites
end
serverlistmgr.favorites = {}
-- Add favorites, removing duplicates
local seen = {}
for _, fav in ipairs(read_favorites() or {}) do
local key = ("%s:%d"):format(fav.address:lower(), fav.port)
if not seen[key] then
seen[key] = true
serverlistmgr.favorites[#serverlistmgr.favorites + 1] = fav
end
end
return serverlistmgr.favorites
end
--------------------------------------------------------------------------------
function serverlistmgr.add_favorite(new_favorite)
assert(type(new_favorite.port) == "number")
-- Whitelist favorite keys
new_favorite = {
name = new_favorite.name,
address = new_favorite.address,
port = new_favorite.port,
description = new_favorite.description,
}
local favorites = serverlistmgr.get_favorites()
delete_favorite(favorites, new_favorite)
table.insert(favorites, 1, new_favorite)
save_favorites(favorites)
end
--------------------------------------------------------------------------------
function serverlistmgr.delete_favorite(del_favorite)
local favorites = serverlistmgr.get_favorites()
delete_favorite(favorites, del_favorite)
save_favorites(favorites)
end