Mô đun:Chem2

local getArgs = require('Mô đun:Arguments').getArgs
local p = {} -- module's table
local am = {}  -- Elements with wiki links
am.H="H";am.He="He";
am.Li="Li";am.Be="Be";am.B="B";am.C="C";am.N="N";am.O="O";am.F="F";am.Ne="Ne";
am.Na="Na";am.Mg="Mg";am.Al="Al";am.Si="Si";am.P="P";am.S="S";am.Cl="Cl";am.Ar="Ar";
am.K="K";am.Ca="Ca";am.Sc="Sc";am.Ti="Ti";am.V="V";am.Cr="Cr";am.Mn="Mn";am.Fe="Fe";am.Co="Co";am.Ni="Ni";am.Cu="Cu";am.Zn="Zn";am.Ga="Ga";am.Ge="Ge";am.As="As";am.Se="Se";am.Br="Br";am.Kr="Kr";am.Rb="Rb";
am.Sr="Sr";am.Y="Y";am.Zr="Zr";am.Nb="Nb";am.Mo="Mo";am.Tc="Tc";am.Ru="Ru";am.Rh="Rh";am.Pd="Pd";am.Ag="Ag";am.Cd="Cd";am.In="In";am.Sn="Sn";am.Sb="Sb";am.Te="Te";am.I="I";am.Xe="Xe";
am.Cs="Cs";am.Ba="Ba";am.La="La";am.Ce="Ce";am.Pr="Pr";am.Nd="Nd";am.Pm="Pm";am.Sm="Sm";am.Eu="Eu";am.Gd="Gd";am.Tb="Tb";am.Dy="Dy";am.Ho="Ho";am.Er="Er";am.Tm="Tm";am.Yb="Yb";am.Lu="Lu";am.Hf="Hf";am.Ta="Ta";am.W="W";am.Re="Re";am.Os="Os";am.Ir="Ir";am.Pt="Pt";am.Au="Au";am.Hg="Hg";am.Tl="Tl";am.Pb="Pb";am.Bi="Bi";am.Po="Po";am.At="At";am.Rn="Rn";
am.Fr="Fr";am.Ra="Ra";am.Ac="Ac";am.Th="Th";am.Pa="Pa";am.U="U";am.Np="Np";am.Pu="Pu";am.Am="Am";am.Cm="Cm";am.Bk="Bk";am.Cf="Cf";am.Es="Es";am.Fm="Fm";am.Md="Md";am.No="No";am.Lr="Lr";am.Rf="Rf";am.Db="Db";am.Sg="Sg";am.Bh="Bh";am.Hs="Hs";am.Mt="Mt";am.Ds="Ds";am.Rg="Rg";am.Cp="Cp";am.Nh="Nh";am.Fl="Fl";am.Mc="Mc";am.Lv="Lv";am.Ts="Ts";am.Og="Og";
local T_ELEM = 0         -- token types
local T_NUM = 1          -- number
local T_OPEN = 2         -- open '('
local T_CLOSE = 3        -- close ')'
local T_PM_CHARGE = 4    -- + or −
local T_WATER = 6        -- .xH2O x number
local T_CRYSTAL = 9      -- .x
local T_CHARGE = 8       -- charge (x+), (x-)
local T_SUF_CHARGE = 10  -- suffix and charge e.g. 2+ from H2+
local T_SUF_CHARGE2 = 12 -- suffix and (charge) e.g. 2(2+) from He2(2+)
local T_SPECIAL = 14     -- starting with \ e.g. \d for double bond (=)
local T_SPECIAL2 = 16    -- starting with \y{x} e.g. \i{12} for isotope with mass number 12
local T_ARROW_R = 17     -- match: ->
local T_ARROW_EQ = 18    -- match: 
local T_UNDERSCORE = 19  -- _{ ... }
local T_CARET = 20       -- ^{ ... }
local T_NOCHANGE = 30        -- Anything else like ☃
function su(up, down) -- like bản mẫu:su
if (down == "") then 
return "" .. up .. "";
else
return "" .. up .. "" .. down .. "";
end
end
function DotIt()
return '·'
end
function item(f) -- (iterator) returns one token (type, value) at a time from the formula 'f'
local i = 1
local first = "true";
return function ()
	local t, x = nil, nil
if (first == "true" and f:match('^0-9', i)) then 
x = f:match('^%d.+', i); t = T_NOCHANGE; i = i + x:len();   -- matching coefficient (need a space first)
elseif i ', i); t = T_ARROW_EQ; end       -- matching 
		if not x then x = f:match('^%-%>', i); t = T_ARROW_R; end       -- matching ->
		if not x then x = f:match('^%u%l*', i); t = T_ELEM; end        -- matching symbols like Aaaaa
		if not x then x = f:match('^%d++-', i); t = T_SUF_CHARGE; end        -- matching x+, x-
		if not x then x = f:match('^%d+%(%d*+-%)', i); t = T_SUF_CHARGE2; end        -- matching x(y+/-), x(+/-)
		if not x then x = f:match('^%(%d*+-%)', i); t = T_CHARGE; end        -- matching (x+) (xx+), (x-) (xx-)
		if not x then x = f:match('^%d.+', i); t = T_NUM; end        -- matching number
		if not x then x = f:match('^%', i); t = T_CLOSE; end           -- matching )}
		if not x then x = f:match('^+-', i); t = T_PM_CHARGE; end        -- matching + or -
		if not x then x = f:match('^%*%d.*H2O', i); t = T_WATER; end -- Crystal water
		if not x then x = f:match('^%*%d.*', i); t = T_CRYSTAL; end -- Crystal
		if not x then x = f:match('^\\.{%d+}', i); t = T_SPECIAL2; end -- \y{x}
		if not x then x = f:match('^\\.', i); t = T_SPECIAL; end -- \x
		if not x then x = f:match('^_{^}*}', i); t = T_UNDERSCORE; end -- _{...}
		if not x then x = f:match('^\^{^}*}', i); t = T_CARET; end -- ^{...}
		if not x then x = f:match('^.', i); t = T_NOCHANGE; end  --the rest - one by one
		if x then i = i + x:len(); else i = i + 999; error("Ký tự không hợp lệ trong công thức
: "..f) end
	end
first = "false"
	return t, x
	end
end
function p._chem(args)

local f = args1 or 
f = string.gsub(f, "–", "-")  -- replace – with - (hyphen not ndash)
f = string.gsub(f, "−", "-")  -- replace – with - (hyphen not minus sign)
local sumO = 0
local formula = 
local t, x
local link = args'link' or ""
local auto = args'auto' or ""
if not (link == ) then formula = formula .. "" .. link .. "|"; end   -- wikilink start link|

for t, x in item(f) do 
if     t == T_ELEM then if (auto == ) then formula = formula .. x elseif amx then formula = formula .. amx; amx = x else formula = formula .. x end 
elseif t == T_COEFFICIENT then formula = formula .. x
elseif t == T_NUM   then formula = formula .. su("", x);
elseif t == T_OPEN  then formula = formula .. x; sumO = sumO + 1;        -- ( {
elseif t == T_CLOSE then formula = formula .. x; sumO = sumO -1;         -- ) }
elseif t == T_PM_CHARGE    then formula = formula .. su(string.gsub(x, "-", "−"), "");
elseif t == T_SUF_CHARGE then 
formula = formula .. su(string.gsub(string.match(x, "+-"), "-", "−"), string.match(x, "%d+"), "");
elseif t == T_SUF_CHARGE2 then 
formula = formula .. su(string.sub(string.gsub(string.match(x, "%(%d*+-"), "-", "−"), 2, -1), string.match(x, "%d+"))
elseif t == T_CHARGE then formula = formula .. ""; if string.match(x, "%d+") then formula = formula .. string.match(x, "%d+"); end formula = formula .. string.gsub(string.match(x, "%+-"), "-", "−") .. "";  -- can not concatenat a nil value from string.match(x, "%d+");
elseif t == T_CRYSTAL then formula = formula .. DotIt() .. string.gsub( x, "*", , 1 );
elseif t == T_SPECIAL then
parameter = string.sub(x, 2, 2) -- x fra \x  
if       parameter == "s" then formula = formula .. "−"   -- single bond
elseif parameter == "d" then formula = formula .. "="   -- double bond
elseif parameter == "t" then formula = formula .. "≡"   -- tripple bond
elseif parameter == "q" then formula = formula .. "≣"   -- Quadruple bond
elseif parameter == "h" then formula = formula .. "η"   -- η, hapticity
elseif parameter == "*" then formula = formula .. "*"   -- *, normal             elseif parameter == "-" then formula = formula .. "-"   -- -
elseif parameter == "\\" then formula = formula .. "\\"   -- \
elseif parameter == "\'" then formula = formula .. "'"   -- html-code for '
end
elseif t == T_SPECIAL2 then  -- \y{x}
parameter = string.sub(x, 2, 2) -- y fra \y{x} 
if parameter  == "h" then --Hapticity
if (auto == ) then formula = formula .. "η" .. string.match(x, '%d+') .. "-"
else
formula = formula .. "η" .. string.match(x, '%d+') .. "-"
end
elseif parameter == "m" then formula = formula .. "μ" .. string.match(x, '%d+') .. "-" -- mu (bridging ligand)
end
elseif t == T_WATER then 
if string.match(x, "^%*%d.") then 
formula = formula .. DotIt() .. string.match(x, "%f%.%d%d*%.?%d*%f^%.%d%") .. "H2O";
else
formula = formula .. DotIt() .. "H2O";
end  
elseif t == T_UNDERSCORE  then formula = formula .. su("", string.sub(x,3,-2)) -- x contains _{string}
elseif t == T_CARET then formula = formula .. su(string.sub(x,3,-2), "") -- x contains ^{string}
elseif t == T_ARROW_R then formula = formula .. " → "
elseif t == T_ARROW_EQ then formula = formula .. " ⇌ "
elseif t == T_NOCHANGE  then formula = formula .. x;  -- The rest - everything which isn't captured by the regular expresions. E.g. wikilinks and pipes

else error('không đưa ra được - ???') end -- in fact, unreachable
end
if not (link == nil or link == ) then formula = formula .. ""; end   -- wikilink closing 
return  .. formula ..  
end
function p.chem(frame)
	local args = getArgs(frame)
	return p._chem(args)
end
return p