Editing Module:Sandbox/Gonnym/sometest5/2

--[[
A category layout is as follows (not all items appear in all categories):
- Poratls
- "Container category" template
- Hatnotes
- Header text
- Navigation template
]]--

local getOrdinal = require('Module:Ordinal')._ordinal

local ERROR_CATEGORY = "[[Category:Errors reported by television chronology category header templates]]"

local navigationTemplates = {
	["year"] = "Navseasoncats with decades below year/sandbox",
	["decade"] = "Navseasoncats with centuries below decade/sandbox",
	["century"] = "Navseasoncats"
}

local p = {}

p.errorMessagePrefixList = {
	["NOT_ON_CATEGORY"] = "This page is not a category!<br />",
	["INVALID_PAGE_NAME"] = "Invalid page name.<br />",
}

function p.isOnCategory(pageName)
	if (pageName.nsText == 'Category') then
		return true
	else
		return false
	end
end

function p.getPortals(frame, portal_categories, timePeriod)
	table.insert(portal_categories, frame:expandTemplate{title = "FindYDCportal", args = {timePeriod}})
	return frame:expandTemplate{title = "Portal", args = portalArgs}
end

function p.getContainerCategoryTemplate(frame)
	frame:expandTemplate{title = "Container category"}
end

function p.getCatMainTemplate(frame, title)
	if (mw.title.makeTitle(0, title).exists) then
		return frame:expandTemplate{title = "Cat main", args = {title}}
	else
		return ""
	end
end

function p.getNavigationTemplate(frame, categoryHeader)
	return frame:expandTemplate{title = navigationTemplates[categoryHeader.type]}
end

function p.getError(errorPrefix, errorMessageText)
	local errorMessageText = errorPrefix .. errorMessageText
    local errorMessage = tostring(mw.html.create('strong')
        :addClass('error')
        :wikitext(errorMessageText)
        )
    
    return errorMessage .. ERROR_CATEGORY
end

function p.getMillennium(century)
	century = tonumber(century)
	
	-- Need a more complete solution if this will be used with fictional categories.
	if (century > 9) then
		century = century * 100
	end
	local millennium = math.floor((math.abs(century) - 1) / 1000) + 1
	millennium = getOrdinal(millennium) .. " millennium"
	if (century < 0) then
		millennium = millennium .. " BC"
	end
	
	return millennium
end

function p.getCentury(decade)
	decade = tonumber(decade)
	local century = ((decade - 1) / 100) + 1
	if (decade < -1) then
		century = century - 1
	end
	century = math.floor(century)
	return getOrdinal(century) .. " century"
end

function p.getDecade(year)
	year = tonumber(year)
	local decade = year / 10
	decade = math.floor(decade)
	decade = decade .. "0s"
	return decade
end

function p.getNextTierTimePeroid(categoryHeader, timePeriod)
	if (categoryHeader.type == "year") then
		return p.getDecade(timePeriod)
	elseif (categoryHeader.type == "decade") then
		return p.getCentury(timePeriod)
	elseif (categoryHeader.type == "century") then
		return p.getMillennium(timePeriod)
	end	
end

return p