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Changes
Implement the merge of Module:Join, Module:Str endswith, Module:PatternCount and Module:Text count into this module per their TfDs. Review and discussion is at https://en.wikipedia.org/w/index.php?title=Module_talk:String&oldid=899040020#Edit_request_t...
]]
function str.len( frame )
local new_args = str._getParameters( frame.args, {'s'} ); local s = new_args['s'] or '';
return mw.ustring.len( s )
end
]]
function str.sub( frame )
local new_args = str._getParameters( frame.args, { 's', 'i', 'j' } ); local s = new_args['s'] or ''; local i = tonumber( new_args['i'] ) or 1; local j = tonumber( new_args['j'] ) or -1;
local len = mw.ustring.len( s );
-- Convert negatives for range checking
if i < 0 then
i = len + i + 1;
end
if j < 0 then
j = len + j + 1;
end
if i > len or j > len or i < 1 or j < 1 then
return str._error( 'String subset index out of range' );
end
if j < i then
return str._error( 'String subset indices out of order' );
end
]]
-- This sub-routine is exported for use in other modulesfunction str.match( frame ) local new_args = str._getParameters_match( frame.args, {'s', 'pattern', 'start', 'match'match_index, 'plain'plain_flag, 'nomatch'} ); local s = new_args['s'] or ''; local start = tonumber( new_args['start'] ) or 1; local plain_flag = str._getBoolean( new_args['plain'] or false ); local pattern = new_args['pattern'] or ''; local match_index = math.floor( tonumber(new_args['match']) or 1 ); local nomatch = new_args['nomatch'];
if s == '' then
return str._error( 'Target string is empty' );
end
if pattern == '' then
return str._error( 'Pattern string is empty' );
end
start = tonumber(start) or 1
if math.abs(start) < 1 or math.abs(start) > mw.ustring.len( s ) then
return str._error( 'Requested start is out of range' );
end
if match_index == 0 then
return str._error( 'Match index is out of range' );
end
if plain_flag then
pattern = str._escapePattern( pattern );
end
else
if start > 1 then
s = mw.ustring.sub( s, start );
end
local iterator = mw.ustring.gmatch(s, pattern);
if match_index > 0 then
-- Forward search
for w in iterator do
match_index = match_index - 1;
if match_index == 0 then
result = w; break;
end
end
else
-- Reverse search
local result_table = {}; local count = 1;
for w in iterator do
result_table[count] = w; count = count + 1;
end
result = result_table[ count + match_index ];
end
end
if result == nil then
if nomatch == nil then
return str._error( 'Match not found' );
else
return nomatch;
end
else
return result;
end
end
-- This is the entry point for #invoke:String|match
function str.match( frame )
local new_args = str._getParameters( frame.args, {'s', 'pattern', 'start', 'match', 'plain', 'nomatch'} )
local s = new_args['s'] or ''
local start = tonumber( new_args['start'] ) or 1
local plain_flag = str._getBoolean( new_args['plain'] or false )
local pattern = new_args['pattern'] or ''
local match_index = math.floor( tonumber(new_args['match']) or 1 )
local nomatch = new_args['nomatch']
return str._match( s, pattern, start, match_index, plain_flag, nomatch )
end
]]
function str.pos( frame )
local new_args = str._getParameters( frame.args, {'target', 'pos'} ); local target_str = new_args['target'] or ''; local pos = tonumber( new_args['pos'] ) or 0;
if pos == 0 or math.abs(pos) > mw.ustring.len( target_str ) then
return str._error( 'String index out of range' );
end
return mw.ustring.sub( target_str, pos, pos );
end
]]
function str.str_find( frame )
local new_args = str._getParameters( frame.args, {'source', 'target'} ); local source_str = new_args['source'] or ''; local target_str = new_args['target'] or '';
if target_str == '' then
return 1;
end
]]
function str.find( frame )
local new_args = str._getParameters( frame.args, {'source', 'target', 'start', 'plain' } ); local source_str = new_args['source'] or ''; local pattern = new_args['target'] or ''; local start_pos = tonumber(new_args['start']) or 1; local plain = new_args['plain'] or true;
if source_str == '' or pattern == '' then
return 0;
end
plain = str._getBoolean( plain );
local start = mw.ustring.find( source_str, pattern, start_pos, plain )
]]
function str.replace( frame )
local new_args = str._getParameters( frame.args, {'source', 'pattern', 'replace', 'count', 'plain' } ); local source_str = new_args['source'] or ''; local pattern = new_args['pattern'] or ''; local replace = new_args['replace'] or ''; local count = tonumber( new_args['count'] ); local plain = new_args['plain'] or true;
if source_str == '' or pattern == '' then
return source_str;
end
plain = str._getBoolean( plain );
if plain then
pattern = str._escapePattern( pattern ); replace = mw.ustring.gsub( replace, "%%", "%%%%" ); --Only need to escape replacement sequences.
end
local result;
if count ~= nil then
result = mw.ustring.gsub( source_str, pattern, replace, count );
else
result = mw.ustring.gsub( source_str, pattern, replace );
end
return result;
end
simple function to pipe string.rep to templates.
]]
function str.rep( frame )
local repetitions = tonumber( frame.args[2] )
local pattern_str = frame.args[1]
if not pattern_str then
return str._error( 'No pattern string specified' );
end
local result = str._escapePattern( pattern_str )
return result
end
--[[
count
This function counts the number of occurrences of one string in another.
]]
function str.count(frame)
local args = str._getParameters(frame.args, {'source', 'pattern', 'plain'})
local source = args.source or ''
local pattern = args.pattern or ''
local plain = str._getBoolean(args.plain or true)
if plain then
pattern = str._escapePattern(pattern)
end
local _, count = mw.ustring.gsub(source, pattern, '')
return count
end
--[[
endswith
This function determines whether a string ends with another string.
]]
function str.endswith(frame)
local args = str._getParameters(frame.args, {'source', 'pattern'})
local source = args.source or ''
local pattern = args.pattern or ''
if pattern == '' then
-- All strings end with the empty string.
return "yes"
end
if mw.ustring.sub(source, -mw.ustring.len(pattern), -1) == pattern then
return "yes"
else
return ""
end
end
--[[
join
Join all non empty arguments together; the first argument is the separator.
Usage:
{{#invoke:String|join|sep|one|two|three}}
]]
function str.join(frame)
local args = {}
local sep
for _, v in ipairs( frame.args ) do
if sep then
if v ~= '' then
table.insert(args, v)
end
else
sep = v
end
end
return table.concat( args, sep or '' )
end
]]
function str._getParameters( frame_args, arg_list )
local new_args = {}; local index = 1; local value;
for i_,arg in ipairs( arg_list ) do
value = frame_args[arg]
if value == nil then
value = frame_args[index]; index = index + 1;
end
new_args[arg] = value;
end
return new_args;
end
]]
function str._error( error_str )
local frame = mw.getCurrentFrame(); local error_category = frame.args.error_category or 'Errors reported by Module String'; local ignore_errors = frame.args.ignore_errors or false; local no_category = frame.args.no_category or false;
if str._getBoolean(ignore_errors) then
return '';
end
local error_str = '<strong class="error">String Module Error: ' .. error_str .. '</strong>';
if error_category ~= '' and not str._getBoolean( no_category ) then
error_str = '[[Category:' .. error_category .. ']]' .. error_str;
end
return error_str;
end
]]
function str._getBoolean( boolean_str )
local boolean_value;
if type( boolean_str ) == 'string' then
boolean_str = boolean_str:lower();
if boolean_str == 'false' or boolean_str == 'no' or boolean_str == '0'
or boolean_str == '' then
boolean_value = false;
else
boolean_value = true;
end
elseif type( boolean_str ) == 'boolean' then
boolean_value = boolean_str;
else
error( 'No boolean value found' );
end
return boolean_value
]]
function str._escapePattern( pattern_str )
return mw.ustring.gsub( pattern_str, "([%(%)%.%%%+%-%*%?%[%^%$%]])", "%%%1" );
end
return str
