မေႃႇၵျူး:Check isxn

ၽိုၼ်ၵႅမ်မိုဝ်း

ၽိုၼ်ၵႅမ်မိုဝ်းဢၼ်ၼႆႉ ပဵၼ်ဢၼ်ၶဝ်ႈပႃးမႃးတီႈ မေႃႇၵျူး:Check isxn/doc။ (မႄးထတ်း | ပိုၼ်း)
ၶေႃႈၽၢင်ႉ တႃႈ ၽူႈမႄးထတ်းၶဝ် - Please don't categorize this template by editing it directly. Instead, place the category in its documentation page, in its "includeonly" section.

This module may be used to validate ISBNs, ISMNs, and ISSNs.

လွင်ႈၸႂ်ႉတိုဝ်း

For ISBNs,

{{#invoke:Check isxn|check_isbn|978-0-12-345678-9|error=Invalid ISBN}}

For ISMNs,

{{#invoke:Check isxn|check_ismn|979-0-1234567-8-9|error=Invalid ISMN}}

For ISSNs,

{{#invoke:Check isxn|check_issn|1234-5678|error=Invalid ISSN}}

တူဝ်ယၢင်ႇ

{{#invoke:Check isxn|check_isbn|978-3-16-148410-0|error=Invalid ISBN}} →
{{#invoke:Check isxn|check_isbn|978-0-12-345678-9|error=Invalid ISBN}} → Invalid ISBN
{{#invoke:Check isxn|check_isbn|ISBN 978-3-16-148410-0|error=Invalid ISBN}} → Invalid ISBN
{{#invoke:Check isxn|check_ismn|979-0-9016791-7-7|error=Invalid ISMN}} →
{{#invoke:Check isxn|check_ismn|979-0-1234567-8-9|error=Invalid ISMN}} → Invalid ISMN
{{#invoke:Check isxn|check_issn|1234-5679|error=Invalid ISSN}} →
{{#invoke:Check isxn|check_issn|1234-5678|error=Invalid ISSN}} → Invalid ISSN

Templates/modules using this module

{{ISBN}}

-- This template is a copy of the ISXN validation code from [[မေႃႇၵျူး:Citation/CS1]]
-- which allows for validating ISBN, ISMN, and ISSN without invoking a citation template

local p = {}

--[[--------------------------< IS _ V A L I D _ I S X N >-----------------------------------------------------

ISBN-10 and ISSN validator code calculates checksum across all isbn/issn digits including the check digit. ISBN-13 is checked in check_isbn().
If the number is valid the result will be 0. Before calling this function, issbn/issn must be checked for length and stripped of dashes,
spaces and other non-isxn characters.

]]

local function is_valid_isxn (isxn_str, len)
	local temp = 0;
	isxn_str = { isxn_str:byte(1, len) };	-- make a table of byte values '0' → 0x30 .. '9'  → 0x39, 'X' → 0x58
	len = len+1;							-- adjust to be a loop counter
	for i, v in ipairs( isxn_str ) do		-- loop through all of the bytes and calculate the checksum
		if v == string.byte( "X" ) then		-- if checkdigit is X (compares the byte value of 'X' which is 0x58)
			temp = temp + 10*( len - i );	-- it represents 10 decimal
		else
			temp = temp + tonumber( string.char(v) )*(len-i);
		end
	end
	return temp % 11 == 0;					-- returns true if calculation result is zero
end


--[[--------------------------< IS _ V A L I D _ I S X N  _ 1 3 >----------------------------------------------

ISBN-13 and ISMN validator code calculates checksum across all 13 isbn/ismn digits including the check digit.
If the number is valid, the result will be 0. Before calling this function, isbn-13/ismn must be checked for length
and stripped of dashes, spaces and other non-isxn-13 characters.

]]

local function is_valid_isxn_13 (isxn_str)
	local temp=0;
	
	isxn_str = { isxn_str:byte(1, 13) };										-- make a table of byte values '0' → 0x30 .. '9'  → 0x39
	for i, v in ipairs( isxn_str ) do
		temp = temp + (3 - 2*(i % 2)) * tonumber( string.char(v) );				-- multiply odd index digits by 1, even index digits by 3 and sum; includes check digit
	end
	return temp % 10 == 0;														-- sum modulo 10 is zero when isbn-13/ismn is correct
end

--[[--------------------------< C H E C K _ I S B N >------------------------------------------------------------

Determines whether an ISBN string is valid

]]

local function check_isbn( isbn_str, error_string )
	if nil ~= isbn_str:match("[^%s-0-9X]") then -- fail if isbn_str contains anything but digits, hyphens, or the uppercase X
		return error_string;
	end
	isbn_str = isbn_str:gsub( "-", "" ):gsub( " ", "" );	-- remove hyphens and spaces
	local len = isbn_str:len();
 
	if len ~= 10 and len ~= 13 then
		return error_string;
	end

	if len == 10 then
		if isbn_str:match( "^%d*X?$" ) == nil then 
			return error_string; 
		end
		return is_valid_isxn(isbn_str, 10) and '' or error_string;
	else
		local temp = 0;
		if isbn_str:match( "^97[89]%d*$" ) == nil then -- isbn13 begins with 978 or 979; ismn begins with 979
			return error_string; 
		end
		return is_valid_isxn_13 (isbn_str) and '' or error_string;
	end
end

--[[--------------------------< C H E C K _ I S M N >------------------------------------------------------------

Determines whether an ISMN string is valid.  Similar to isbn-13, ismn is 13 digits begining 979-0-... and uses the
same check digit calculations.  See http://www.ismn-international.org/download/Web_ISMN_Users_Manual_2008-6.pdf
section 2, pages 9–12.

]]

local function check_ismn (id, error_string)
	local text;
	local valid_ismn = true;

	id=id:gsub( "[%s-–]", "" );													-- strip spaces, hyphens, and endashes from the ismn

	if 13 ~= id:len() or id:match( "^9790%d*$" ) == nil then					-- ismn must be 13 digits and begin 9790
		valid_ismn = false;
	else
		valid_ismn=is_valid_isxn_13 (id);										-- validate ismn
	end

	return valid_ismn and '' or error_string
end

--[[--------------------------< I S S N >----------------------------------------------------------------------

Validate and format an issn.  This code fixes the case where an editor has included an ISSN in the citation but has separated the two groups of four
digits with a space.  When that condition occurred, the resulting link looked like this:

	|issn=0819 4327 gives: [http://www.worldcat.org/issn/0819 4327 0819 4327]  -- can't have spaces in an external link
	
This code now prevents that by inserting a hyphen at the issn midpoint.  It also validates the issn for length and makes sure that the checkdigit agrees
with the calculated value.  Incorrect length (8 digits), characters other than 0-9 and X, or checkdigit / calculated value mismatch will all cause a check issn
error message.

]]

local function check_issn(id, error_string)
	local issn_copy = id;		-- save a copy of unadulterated issn; use this version for display if issn does not validate
	local text;
	local valid_issn = true;

	if not id:match ('^%d%d%d%d%-%d%d%d[%dX]$') then
		return error_string;
	end
	
	id=id:gsub( "[%s-–]", "" );									-- strip spaces, hyphens, and endashes from the issn

	if 8 ~= id:len() or nil == id:match( "^%d*X?$" ) then		-- validate the issn: 8 digits long, containing only 0-9 or X in the last position
		valid_issn=false;										-- wrong length or improper character
	else
		valid_issn=is_valid_isxn(id, 8);						-- validate issn
	end

	return valid_issn and '' or error_string
end


------------------------------< E N T R Y   P O I N T S >--------------------------------------------------====

function p.check_isbn(frame)
	return check_isbn(frame.args[1] or frame:getParent().args[1], frame.args['error'] or frame:getParent().args['error'] or 'error')
end

function p.check_ismn(frame)
	return check_ismn(frame.args[1] or frame:getParent().args[1], frame.args['error'] or frame:getParent().args['error'] or 'error')
end

function p.check_issn(frame)
	return check_issn(frame.args[1] or frame:getParent().args[1], frame.args['error'] or frame:getParent().args['error'] or 'error')
end

return p