Difference between revisions of "Module:Yesno"

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en>ATDT
(Add inline comments)
en>Mr. Stradivarius
(get arguments from the parent frame if the current frame doesn't have any)
Line 1: Line 1:
 
local p = {}
 
local p = {}
 
   
 
   
function p.yesno( frame )
+
function p.yesno(frame)
 
   
 
   
 
     -- defaults
 
     -- defaults
Line 12: Line 12:
 
     -- Allow arguments to override defaults.
 
     -- Allow arguments to override defaults.
 
     -- 'any' tracks the presence of any arguments at all.
 
     -- 'any' tracks the presence of any arguments at all.
 +
    local args = frame.args
 
     local any = false
 
     local any = false
     for k,v in pairs( frame.args ) do
+
     for k,v in pairs(args) do
 
         any = true
 
         any = true
 
         retvals[k] = v
 
         retvals[k] = v
 
     end
 
     end
 +
    -- If there are no arguments, try and get them from the parent frame.
 +
    if any == false then
 +
        local pframe = frame:getParent()
 +
        args = pframe.args
 +
        for k,v in pairs(args) do
 +
            any = true
 +
            retvals[k] = v
 +
        end
 +
    end   
 
   
 
   
     val = frame.args[1]
+
     val = args[1]
 
   
 
   
 
     -- According to the template docs, the input should be considered nil
 
     -- According to the template docs, the input should be considered nil

Revision as of 10:35, 23 March 2013

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

local p = {}
 
function p.yesno(frame)
 
    -- defaults
    local retvals = {
        yes   = "yes",
        no    = "",
        ["¬"] = ""
    }
 
    -- Allow arguments to override defaults.
    -- 'any' tracks the presence of any arguments at all.
    local args = frame.args
    local any = false
    for k,v in pairs(args) do
        any = true
        retvals[k] = v
    end
    -- If there are no arguments, try and get them from the parent frame.
    if any == false then
        local pframe = frame:getParent()
        args = pframe.args
        for k,v in pairs(args) do
            any = true
            retvals[k] = v
        end
    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
 
return p