hungry_games/mods/survival_modpack/survival_thirst/init.lua

local THIRST_TIME = survival.conf_getnum("thirst.start_time", 720);
local PASS_OUT_TIME = survival.conf_getnum("thirst.pass_out_time", 300);
local DTIME = survival.conf_getnum("thirst.check_interval", 0.5);

-- Boilerplate to support localized strings if intllib mod is installed.
local S;
if (minetest.get_modpath("intllib")) then
    dofile(minetest.get_modpath("intllib").."/intllib.lua");
    S = intllib.Getter(minetest.get_current_modname());
else
    S = function ( s ) return s; end
end

local timer = 0;

minetest.register_craftitem("survival_thirst:water_glass", {
    description = S("Glass of Water");
    inventory_image = "survival_thirst_water_glass.png";
    groups = { drink=1; survival_no_override=1; };
    stack_max = 10;
    on_use = function ( itemstack, user, pointed_thing )
        local state = survival.get_player_state(user:get_player_name(), "thirst");
        state.count = 0;
        state.thirsty = false;
        minetest.sound_play({ name="survival_thirst_drink" }, {
            pos = user:getpos();
            max_hear_distance = 16;
            gain = 1.0;
        });
        local inv = user:get_inventory();
        local stack = ItemStack("vessels:drinking_glass");
        if (inv:room_for_item("main", stack)) then
            inv:add_item("main", stack);
        end
        itemstack:take_item(1);
        return itemstack;
    end;
});

local alt_water_sources = {
    ["3dforniture:sink"] = true;
    ["homedecor:kitchen_cabinet_with_sink"] = true;
	["default:water_source"] = true;
	["default:water_flowing"] = true;
};

minetest.register_craftitem(":vessels:drinking_glass", {
	--Or use minetest.registered_items[vessels:drinking_glass] for all parametre.
	description = S("Drinking Glass (empty)"),
	drawtype = "plantlike",
	tiles = {"vessels_drinking_glass.png"},
	inventory_image = "vessels_drinking_glass_inv.png",
	wield_image = "vessels_drinking_glass.png",
	paramtype = "light",
	walkable = false,
	selection_box = {
		type = "fixed",
		fixed = {-0.25, -0.5, -0.25, 0.25, 0.4, 0.25}
	},
	groups = {vessel=1,dig_immediate=3,attached_node=1},
	sounds = default.node_sound_glass_defaults(),
	liquids_pointable = true,
	on_use = function(itemstack, user, pointed_thing)
		if pointed_thing.type ~= "node" then
			return
		end
		local node = minetest.get_node(pointed_thing.under)
		if alt_water_sources[node.name] then
			local newitem = ItemStack("survival_thirst:water_glass 1");
			local inv = user:get_inventory();
			if (inv:room_for_item("main", newitem)) then
				inv:add_item("main", newitem);
				if not(minetest.registered_items[node.name].liquidtype=="none") then
					minetest.remove_node(pointed_thing.under);
				end
				itemstack:take_item(); 
				return itemstack
			end
		end	
	end,
})

minetest.register_craft({
    output = "survival_thirst:water_glass";
    type = "shapeless";
    recipe = {
        "vessels:drinking_glass",
        "bucket:bucket_water",
    };
    replacements = {
        { "bucket:bucket_water", "bucket:bucket_empty" },
    };
});

-- Known drink items (more suggestions are welcome)
local known_drinks = {

    -- This very mod --
    --"survival_thirst:water_glass",

    -- rubenwardy's food --
    "food:apple_juice", "food:cactus_juice",

};

local function override_on_use ( def )
    local on_use = def.on_use;
    def.on_use = function ( itemstack, user, pointed_thing )
        local state = survival.get_player_state(user:get_player_name(), "thirst");
        minetest.sound_play({ name="survival_thirst_drink" }, {
            pos = user:getpos();
            max_hear_distance = 16;
            gain = 1.0;
        });
        if (on_use) then
            return on_use(itemstack, user, pointed_thing);
        else
            itemstack:take_item(1);
            return itemstack;
        end
    end
end

-- Try to override the on_use callback of as many food items as possible.
minetest.after(1, function ( )

    for _,name in ipairs(known_drinks) do
        local def = minetest.registered_items[name] or minetest.registered_nodes[name];
        if (def) then
            if ((not def.groups.survival_no_override) or (def.groups.survival_no_override == 0)) then
                override_on_use(def);
            end
        end
    end

    for name, def in pairs(minetest.registered_items) do
        if (def.groups and def.groups.drink and (def.groups.drink > 0)) then
            if ((not def.groups.survival_no_override) or (def.groups.survival_no_override == 0)) then
                override_on_use(def);
            end
        end
    end

end);

survival.register_state("thirst", {
    label = S("Thirst");
    hud = {
        pos = {x=0.5, y=0.9};
        offset = {x=-10, y=-15};
        image = "survival_thirst_hud_water_glass.png";
        bar = "survival_thirst_hud_bar.png";
    };
    get_default = function ( hudidn )
        return {
            hudid = hudidn;
            count = 0;
            thirsty = false;
        };
    end;
    default_scaled_value = 0;
    get_scaled_value = function ( state )
        if (state.thirsty) then
            return 100;
        else
            return 100 - (100 * (THIRST_TIME - state.count) / THIRST_TIME);
        end
    end;
    on_update = function ( dtime, player, state )
        if (player:get_hp() > 0) then
       		local name = player:get_player_name();
		    local privs = minetest.get_player_privs(name)
	        if privs.interact then
	        
		        state.count = state.count + dtime;
		        
		        if (state.thirsty and (state.count >= PASS_OUT_TIME)) then
		            state.count = 0;
		            state.thirsty = false;
		            if (player:get_hp() > 0) then
		                minetest.chat_send_player(name, S("You died from dehydration."));
		            end
		            player:set_hp(0);
		            minetest.sound_play({ name="survival_thirst_pass_out" }, {
		                pos = player:getpos();
		                gain = 1.0;
		                max_hear_distance = 16;
		            });
		        elseif ((not state.thirsty) and (state.count >= THIRST_TIME)) then
		            state.count = 0;
		            state.thirsty = true;
		            minetest.sound_play({ name="survival_thirst_thirst" }, {
		                pos = player:getpos();
		                gain = 1.0;
		                max_hear_distance = 16;
		            });
		            minetest.chat_send_player(name, S("You are thirsty."));
		        end
		    end
        end
    end;
});

minetest.register_on_dieplayer(function ( player )
    survival.reset_player_state(player:get_player_name(), "thirst");
end);