src/convert_json.h


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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>

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.
*/

#ifndef __CONVERT_JSON_H__
#define __CONVERT_JSON_H__

#include <json/json.h>

struct ModStoreMod;
struct ModStoreModDetails;

std::vector<ModStoreMod>    readModStoreList(Json::Value& modlist);
ModStoreModDetails          readModStoreModDetails(Json::Value& details);

Json::Value                 fetchJsonValue(const std::string &url,
                                           std::vector<std::string> *extra_headers);

#endif
-- Minetest: builtin/misc.lua

--
-- Misc. API functions
--

local timers = {}
local mintime
local function update_timers(delay)
	mintime = false
	local sub = 0
	for index = 1, #timers do
		index = index - sub
		local timer = timers[index]
		timer.time = timer.time - delay
		if timer.time <= 0 then
			core.set_last_run_mod(timer.mod_origin)
			timer.func(unpack(timer.args or {}))
			table.remove(timers, index)
			sub = sub + 1
		elseif mintime then
			mintime = math.min(mintime, timer.time)
		else
			mintime = timer.time
		end
	end
end

local timers_to_add
local function add_timers()
	for _, timer in ipairs(timers_to_add) do
		table.insert(timers, timer)
	end
	timers_to_add = false
end

local delay = 0
core.register_globalstep(function(dtime)
	if not mintime then
		-- abort if no timers are running
		return
	end
	if timers_to_add then
		add_timers()
	end
	delay = delay + dtime
	if delay < mintime then
		return
	end
	update_timers(delay)
	delay = 0
end)

function core.after(time, func, ...)
	assert(tonumber(time) and type(func) == "function",
			"Invalid core.after invocation")
	if not mintime then
		mintime = time
		timers_to_add = {{
			time   = time+delay,
			func   = func,
			args   = {...},
			mod_origin = core.get_last_run_mod(),
		}}
		return
	end
	mintime = math.min(mintime, time)
	timers_to_add = timers_to_add or {}
	timers_to_add[#timers_to_add+1] = {
		time   = time+delay,
		func   = func,
		args   = {...},
		mod_origin = core.get_last_run_mod(),
	}
end

function core.check_player_privs(player_or_name, ...)
	local name = player_or_name
	-- Check if we have been provided with a Player object.
	if type(name) ~= "string" then
		name = name:get_player_name()
	end
	
	local requested_privs = {...}
	local player_privs = core.get_player_privs(name)
	local missing_privileges = {}
	
	if type(requested_privs[1]) == "table" then
		-- We were provided with a table like { privA = true, privB = true }.
		for priv, value in pairs(requested_privs[1]) do
			if value and not player_privs[priv] then
				table.insert(missing_privileges, priv)
			end
		end
	else
		-- Only a list, we can process it directly.
		for key, priv in pairs(requested_privs) do
			if not player_privs[priv] then
				table.insert(missing_privileges, priv)
			end
		end
	end
	
	if #missing_privileges > 0 then
		return false, missing_privileges
	end
	
	return true, ""
end

local player_list = {}

core.register_on_joinplayer(function(player)
	player_list[player:get_player_name()] = player
end)

core.register_on_leaveplayer(function(player)
	player_list[player:get_player_name()] = nil
end)

function core.get_connected_players()
	local temp_table = {}
	for index, value in pairs(player_list) do
		if value:is_player_connected() then
			table.insert(temp_table, value)
		end
	end
	return temp_table
end

-- Returns two position vectors representing a box of `radius` in each
-- direction centered around the player corresponding to `player_name`
function core.get_player_radius_area(player_name, radius)
	local player = core.get_player_by_name(player_name)
	if player == nil then
		return nil
	end

	local p1 = player:getpos()
	local p2 = p1

	if radius then
		p1 = vector.subtract(p1, radius)
		p2 = vector.add(p2, radius)
	end

	return p1, p2
end

function core.hash_node_position(pos)