Difference between revisions of "Module:Yesno"

From Timelines
Jump to: navigation, search
(get arguments from the parent frame if the current frame doesn't have any)
(recognise "t" for true and "f" for false, per request)
(19 intermediate revisions by one other user not shown)
Line 1: Line 1:
local p = {}
+
-- Function allowing for consistent treatment of boolean-like wikitext input.
+
-- It works similarly to the template {{yesno}}.
function p.yesno(frame)
+
 
+
return function (val, default)
    -- defaults
+
-- If your wiki uses non-ascii characters for any of "yes", "no", etc., you
    local retvals = {
+
-- should replace "val:lower()" with "mw.ustring.lower(val)" in the
        yes  = "yes",
+
-- following line.
        no   = "",
+
val = type(val) == 'string' and val:lower() or val
        ["¬"] = ""
+
if val == nil then
    }
+
return nil
+
elseif val == true
    -- Allow arguments to override defaults.
+
or val == 'yes'
    -- 'any' tracks the presence of any arguments at all.
+
or val == 'y'
    local args = frame.args
+
or val == 'true'
    local any = false
+
or val == 't'
    for k,v in pairs(args) do
+
or tonumber(val) == 1
        any = true
+
then
        retvals[k] = v
+
return true
    end
+
elseif val == false
    -- If there are no arguments, try and get them from the parent frame.
+
or val == 'no'
    if any == false then
+
or val == 'n'
        local pframe = frame:getParent()
+
or val == 'false'
        args = pframe.args
+
or val == 'f'
        for k,v in pairs(args) do
+
or tonumber(val) == 0
            any = true
+
then
            retvals[k] = v
+
return false
        end
+
else
    end   
+
return default
+
end
    val = args[1]
 
 
    -- According to the template docs, the input should be considered nil
 
    -- only when no params were provided. If any params at all were present,
 
    -- the value must be considered blank. A bit weird, if you ask me.
 
    if (val == nil and not any) or val == '¬' then
 
        return retvals['¬']
 
    end
 
 
    val = (val or ''):lower()          -- Coerce to blank if nil; make lowercase.
 
    val = val:match'^%s*(.*%S)' or ''  -- Trim whitespace.
 
 
    if val == '' then
 
        return retvals['blank'] ~= nil and retvals['blank'] or retvals['no']
 
    elseif val == 'n' or val == 'no' or val == '0' then
 
        return retvals['no']
 
    elseif val == 'y' or val == 'yes' or val == '1' or retvals['def'] == nil then
 
        return retvals['yes']
 
    else
 
        return retvals['def']
 
    end
 
 
end
 
end
 
return p
 

Revision as of 03:43, 27 April 2015

Documentation for this module may be created at Module:Yesno/doc

-- Function allowing for consistent treatment of boolean-like wikitext input.
-- It works similarly to the template {{yesno}}.

return function (val, default)
	-- If your wiki uses non-ascii characters for any of "yes", "no", etc., you
	-- should replace "val:lower()" with "mw.ustring.lower(val)" in the
	-- following line.
	val = type(val) == 'string' and val:lower() or val
	if val == nil then
		return nil
	elseif val == true 
		or val == 'yes'
		or val == 'y'
		or val == 'true'
		or val == 't'
		or tonumber(val) == 1
	then
		return true
	elseif val == false
		or val == 'no'
		or val == 'n'
		or val == 'false'
		or val == 'f'
		or tonumber(val) == 0
	then
		return false
	else
		return default
	end
end