elepower/elepower_fapi/buffer.lua

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-- This API is compatible with fluidity.
local fluidmod = minetest.get_modpath("fluidity") ~= nil
local function node_data(pos)
local node = minetest.get_node(pos)
local nodedef = minetest.registered_nodes[node.name]
return node, nodedef
end
function elefluid.get_node_buffers(pos)
local node, nodedef = node_data(pos)
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if not nodedef['fluid_buffers'] and not ele.helpers.get_item_group(node.name, "fluidity_tank") then
return nil
end
if fluidmod and ele.helpers.get_item_group(node.name, "fluidity_tank") then
return {fluidity = {}}
end
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return nodedef['fluid_buffers']
end
function elefluid.get_buffer_data(pos, buffer)
local node, nodedef = node_data(pos)
local buffers = elefluid.get_node_buffers(pos)
if not buffers[buffer] then
return nil
end
local meta = minetest.get_meta(pos)
local fluid = meta:get_string(buffer .. "_fluid")
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local amount = meta:get_int(buffer .. "_fluid_storage")
local capacity = buffers[buffer].capacity
local accepts = buffers[buffer].accepts
-- Fluidity tanks compatibility
if buffer == "fluidity" then
local ffluid, fluidcount, fcapacity, fbasetank, fmod = fluidity.tanks.get_tank_at(pos)
fluid = ffluid
amount = fluidcount
accepts = true
capacity = fcapacity
end
return {
fluid = fluid,
amount = amount,
accepts = accepts,
capacity = capacity,
}
end
function elefluid.buffer_accepts_fluid(pos, buffer, fluid)
local bfdata = elefluid.get_buffer_data(pos, buffer)
if not bfdata then return false end
if bfdata.accepts == true or bfdata.accepts == fluid then
return true
end
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if bfdata.fluid ~= "" and bfdata.fluid ~= fluid then
return false
end
if type(bfdata.accepts) ~= "table" then
bfdata.accepts = { bfdata.accepts }
end
for _,pf in pairs(bfdata.accepts) do
if pf == fluid then
return true
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elseif pf:match("^group") and ele.helpers.get_item_group(fluid, pf:gsub("group:", "")) then
return true
end
end
return false
end
function elefluid.can_insert_into_buffer(pos, buffer, fluid, count)
local bfdata = elefluid.get_buffer_data(pos, buffer)
if not bfdata then return nil end
if bfdata.fluid ~= fluid and bfdata.fluid ~= "" then return nil end
local can_put = 0
if bfdata.amount + count > bfdata.capacity then
can_put = bfdata.capacity - bfdata.amount
else
can_put = count
end
return can_put
end
function elefluid.insert_into_buffer(pos, buffer, fluid, count)
local bfdata = elefluid.get_buffer_data(pos, buffer)
if not bfdata then return nil end
if bfdata.fluid ~= fluid and bfdata.fluid ~= "" then return nil end
local can_put = elefluid.can_insert_into_buffer(pos, buffer, fluid, count)
if can_put == 0 then return count end
if buffer == "fluidity" then
return fluidity.tanks.fill_tank_at(pos, fluid, count, true)
end
local meta = minetest.get_meta(pos)
meta:set_int(buffer .. "_fluid_storage", bfdata.amount + can_put)
meta:set_string(buffer .. "_fluid", fluid)
return 0
end
function elefluid.can_take_from_buffer(pos, buffer, count)
local bfdata = elefluid.get_buffer_data(pos, buffer)
if not bfdata then return nil end
local amount = bfdata.amount
local take_count = 0
if amount < count then
take_count = amount
else
take_count = count
end
return take_count
end
function elefluid.take_from_buffer(pos, buffer, count)
local bfdata = elefluid.get_buffer_data(pos, buffer)
if not bfdata then return nil end
local fluid = bfdata.fluid
local amount = bfdata.amount
local take_count = elefluid.can_take_from_buffer(pos, buffer, count)
if buffer == "fluidity" then
local fname, cf = fluidity.tanks.take_from_tank_at(pos, count, true)
if cf then
count = count - cf
end
return fname, count
end
local new_storage = amount - take_count
if new_storage == 0 then
fluid = ""
end
local meta = minetest.get_meta(pos)
meta:set_int(buffer .. "_fluid_storage", new_storage)
meta:set_string(buffer .. "_fluid", fluid)
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return bfdata.fluid, take_count
end