-- [ʞ] fab.lua
-- ~ lexi hale <lexi@hale.su>
-- 🄯 EUPL1.2
-- ? fabrication spec class
-- a type.fab supports two operators:
--
-- + used for compounding recipes. that is,
-- a+b = compose a new spec from the spec parts a and b.
-- this is used e.g. for creating tier-based
-- fabspecs.
--
-- * used for determining quantities. that is,
-- f*x = spec to make x instances of f
--
-- new fab fields must be defined in starlit.type.fab.opClass.
-- this maps a name to fn(a,b,n) -> quant, where a is the first
-- argument, b is a compounding amount, and n is a quantity of
-- items to produce. fields that are unnamed will be underwritten
local function fQuant(a,b,n) return ((a or 0)+(b or 0))*n end
local function fFac (a,b,n)
if a == nil and b == nil then return nil end
local f if a == nil or b == nil then
f = a or b
else
f = (a or 1)*(b or 1)
end
return f*n
end
local function fReq (a,b,n) return a or b end
local function fFlag (a,b,n) return a and b end
local function fSize (a,b,n) return math.max(a,b) end
local opClass = {
-- fabrication eligibility will be determined by which kinds
-- of input a particular fabricator can introduce. e.g. a
-- printer with a but no cache can only print items whose
-- recipe only names elements as ingredients
-- ingredients
element = fQuant; -- (g)
gas = fQuant; -- ()
liquid = fQuant; -- (l)
crystal = fQuant; -- (g)
item = fQuant; -- n
metal = fQuant; -- (g)
metalIngot = fQuant; -- (g)
-- factors
cost = fFac; -- units vary
time = fFac; -- (s)
-- print: base printing time
size = fSize;
-- printBay: size of the printer bay necessary to produce the item
req = fReq;
flag = fFlag; -- means that can be used to produce the item & misc flags
-- print: allow production with a printer
-- smelt: allow production with a smelter
-- all else defaults to underwrite
}
local F = string.format
local strClass = {
element = function(x, n)
local el = starlit.world.material.element[x]
return lib.math.si('g', n) .. ' ' .. (el.sym or el.name)
end;
metal = function(x, n)
local met = starlit.world.material.metal[x]
return lib.math.si('g', n) .. ' ' .. met.name
end;
liquid = function(x, n)
local liq = starlit.world.material.liquid[x]
return lib.math.si('L', n) .. ' ' .. liq.name
end;
gas = function(x, n)
local gas = starlit.world.material.gas[x]
return lib.math.si('g', n) .. ' ' .. gas.name
end;
item = function(x, n)
local i = minetest.registered_items[x]
return tostring(n) .. 'x ' .. i.short_description
end;
}
local order = {
'element', 'metal', 'liquid', 'gas', 'item'
}
local lib = starlit.mod.lib
local fab fab = lib.class {
__name = 'starlit:fab';
opClass = opClass;
strClass = strClass;
order = order;
construct = function(q) return q end;
__index = {
elementalize = function(self)
local e = fab {element = self.element or {}}
for _, kind in pairs {'metal', 'gas', 'liquid'} do
for m,mass in pairs(self[kind] or {}) do
local mc = starlit.world.material[kind][m].composition
e = e + mc:elementalize()*mass
end
end
return e
end;
elementSeq = function(self)
local el = {}
local em = self.element
local s = 0
local eldb = starlit.world.material.element.db
for k in pairs(em) do table.insert(el, k) s=s+eldb[k].n end
table.sort(el, function(a,b)
return eldb[a].n > eldb[b].n
end)
return el, em, s
end;
formula = function(self)
local ts,f=0
if self.element then
f = {}
local el, em, s = self:elementSeq()
local eldb = starlit.world.material.element.db
for i, e in ipairs(el) do
local sym, n = eldb[e].sym, em[e]
if n > 0 then
table.insert(f, string.format("%s%s",
sym, n>1 and lib.str.nIdx(n) or ''))
end
end
f = table.concat(f)
ts = ts + s
end
local sub = {}
for _, w in pairs {'metal', 'gas', 'liquid'} do
if self[w] then
local mdb = starlit.world.material[w].db
for k, amt in pairs(self[w]) do
local mf, s = mdb[k].composition:formula()
if amt > 0 then table.insert(sub, {
f = string.format("(%s)%s",mf,
lib.str.nIdx(amt));
s = s;
}) end
ts = ts + s*amt
end
end
end
table.sort(sub, function(a,b) return a.s > b.s end)
local fml = {}
for i, v in ipairs(sub) do fml[i] = v.f end
if f then table.insert(fml, f) end
fml = table.concat(fml, ' + ')
return fml, ts
end;
};
__tostring = function(self)
local t = {}
for i,o in ipairs(order) do
if self[o] then
for mat,amt in pairs(self[o]) do
if amt > 0 then
table.insert(t, strClass[o](mat, amt))
end
end
end
end
return table.concat(t, ", ")
end;
__add = function(a,b)
local new = fab {}
for cat, vals in pairs(a) do
new[cat] = lib.tbl.copy(vals)
end
for cat, vals in pairs(b) do
if not new[cat] then
new[cat] = lib.tbl.copy(vals)
else
local f = opClass[cat]
for k,v in pairs(vals) do
local n = f(new[cat][k], v, 1)
new[cat][k] = n > 0 and n or nil
end
end
end
return new
end;
__mul = function(x,n)
local new = fab {}
for cat, vals in pairs(x) do
new[cat] = {}
local f = opClass[cat]
for k,v in pairs(vals) do
local num = f(v,nil,n)
new[cat][k] = num > 0 and num or nil
end
end
return new
end;
__div = function(x,n)
return x * (1/n)
end;
}
starlit.type.fab = fab