Module:Navigation with arrows
The module expects template calls like {{NavigationArrows|Row1Cat1=|Row1Cat2=|Row1Lp=|Row1LpSect=|Row1LpAlias=}}, where only the first parameter is required to exist and hold a non-empty string. The parameter set |Row1Cat1=|Row1Cat2=|Row1Lp=|Row1LpSect=|Row1LpAlias= may be repeated up to five times with Row1Cat1 incremented to Row2Cat1, Row1Cat2 to Row2Cat2 etc., the highest meaningful set of parameters being Row6Cat1 etc. The landing page link and text are Row1Cat1 (etc.) unless a valid value is supplied for Row1LpSect (etc.), in which case a valid value for Row1LpAlias (etc.) takes precedence over any for Row1Cat1 (etc.) as text. For category names that are to be uppercased (and have any relevant entity reference normalized to a corresponding apostrophe), the template parameters Row1Cat1Uc and Row1Cat2Uc must be used instead of Row1Cat1 and Row1Cat2.
local p = {} local util = require 'Module:Utilities' local pageName = nil local pFrame local bra, ket, testing = '[[', ']]', false function p.createNavigation(frame) pFrame = frame:getParent() local smwToExecute = '' pageName = getFrameParam('PageName') if isValidParam(pageName) then testing = setTestState() pageName = util.ucSanitize(pageName) local startIdx, maxNavLines, step = 1, 6, 1 for catIdx = startIdx, maxNavLines, step do local cat1, cat1Val = 'Row' .. catIdx .. 'Cat1', nil cat1Val = getFrameCategoryParam(cat1) if isValidParam(cat1Val) then if catIdx > 1 then smwToExecute = smwToExecute .. '<br/>' end local cat2, cat2Val = 'Row' .. catIdx .. 'Cat2', nil cat2Val = getFrameCategoryParam(cat2) smwToExecute = smwToExecute .. buildQuery( cat1Val, cat2Val, getFrameParam('Row' .. catIdx .. 'Lp'), getFrameParam('Row' .. catIdx .. 'LpSect'), getFrameParam('Row' .. catIdx .. 'LpAlias') ) else break end end end if not testing then return frame:preprocess(smwToExecute) else return smwToExecute end end function buildQuery(cat1Val, cat2Val, lp, lpSect, lpAlias) local crit = bra .. 'Category:' .. cat1Val .. ket if isValidParam(cat2Val) then crit = crit .. bra .. 'Category:' .. cat2Val .. ket end return buildQueryLine(crit, '<<', 'descending', 'ItemPrevious') .. buildLandingPage(lp, cat1Val, lpSect, lpAlias) .. buildQueryLine(crit, '>>', 'ascending', 'ItemNext') end function buildQueryLine(criteria, directionOperator, direction, outroTemplate) return '{{#ask:' .. criteria .. bra .. 'Utitle::' .. directionOperator .. pageName .. ket .. '|order=' .. direction .. '|searchlabel=|format=template|introtemplate=' .. outroTemplate .. 'Prefix|template=ItemPrint|outrotemplate=' .. outroTemplate .. '|link=none|limit=1|sort=Utitle}}' end function buildLandingPage(lp, cat, lpSect, lpAlias) local landingPage if isValidParam(lp) then landingPage = lp else landingPage = cat end if isValidParam(lpSect) then landingPage = landingPage .. '#' .. lpSect end if isValidParam(lpSect) or isValidParam(lpAlias) then landingPage = landingPage .. '|' if isValidParam(lpAlias) then landingPage = landingPage .. lpAlias else landingPage = landingPage .. lp end end return bra .. landingPage .. ket end function getFrameParam(catName) local catVal = nil if isValidParam(catName) then catVal = pFrame.args[catName] if catVal == '' then catVal = nil end end return catVal end function getFrameCategoryParam(catName) local val = getFrameParam(catName) if not isValidParam(val) then val = getFrameParam(catName .. 'Uc') if val then val = util.ucSanitize(val) end end return val end function isValidParam(param) return param ~= nil and param ~= '' end function setTestState() local test = getFrameParam('Test') local testState = false if isValidParam(test) and test == 'true' then bra = 'BRABRA' ket = 'KETKET' testState = true end return testState end return p