Module:RenderRecipe

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

-------------------------------------------------------------------------------
-- Renders the {{recipe}} template
--
-- Takes at least one argument. The first, requried, is the name of the 
-- resource for which the recipes are needed. Optionally, the second argument
-- is the name of the building.
-- This module renders small wikimarkup tables to represent one or more 
-- recipes: one table if the building was specified. several tables 
-- corresponding to all the buildings in which the resource can be produced.
-------------------------------------------------------------------------------

local RenderRecipe = {}

local RecipeData = require("Module:RecipeData") -- lookup table for recipes



-------------------------------------------------------------------------------
-- Constants
-------------------------------------------------------------------------------
local CSS_CLASS_RECIPE_TABLE = "class=\"ATSrecipe\""
local CSS_CLASS_REQUIRED_INGREDIENT =  "class=\"ATSrequired\""
local CSS_CLASS_SWAPPABLE_INGREDIENT = "class=\"ATSswappable\""
local TEMPLATE_BUILDING_LINK = "Building_link"
local TEMPLATE_RESOURCE_LINK = "Resource_link"
local TEMPLATE_STAR_SUFFIX = "Star"
local BR = "<br />"
local NL = "\n\n"



-------------------------------------------------------------------------------
-- Main rendering function
-- uses ResourceData lookup function, parses the result and handles errors 
-- with default values, then assembles a final string to return to the wiki
-------------------------------------------------------------------------------
-- need this in whole-class scope, sorry
local thisFrame = {}

function RenderRecipe.renderRecipe(frame)
	
	-- need to set the class variable so expandTemplate can work later
	thisFrame = frame

	local argProductName = frame.args.product
	local argBuildingName = frame.args.building
	
	-- both product and building are specified
	if argProductName and argProductName ~= "" and argBuildingName and argBuildingName ~= "" then
		
		-- returns exactly one recipe with one place
		local recipe = RecipeData.getRecipeAtBuilding(argProductName, argBuildingName)
		if not recipe then
			return "Render_Recipe Error: no recipe found with product=" .. argProductName .. " and building=" .. argBuildingName .. "."
		end
		
		-- only one to render
		-- renderTable will use just the first place in the recipe, which is perfect for this version with only one place
		return RenderRecipe.renderTable(recipe)
	
	-- only product is specified
	elseif argProductName and argProductName ~= "" then
		
		-- gets a whole product's recipe stack, which may be any number of places (1-6)
		local tRecipe = RecipeData.getRecipeForProduct(argProductName)
		if not tRecipe then
			return "Render_Recipe Error: no recipe found with product=" .. argProductName .. "."
		end
		
		local strToReturn = ""
		
		-- go through each place and send a simplified (one place) version of tRecipe to the table renderer
		for i, place in ipairs(tRecipe.places) do
		
			local tempRecipe = { product=argProductName, pattern=tRecipe.pattern, places={place} }
			
			if i > 1 then
				strToReturn = strToReturn .. NL -- separate tables with new lines
			end
			
			-- concatenate the tables together
			strToReturn = strToReturn .. RenderRecipe.renderTable(tempRecipe)
		end
		
		return strToReturn
	
	-- only building is specified
	elseif argBuildingName and argBuildingName ~= "" then
		
		-- gets a table of recipes for different products, each one has exactly one place
		local tableOfRecipes = RecipeData.getBuildingsRecipes(argBuildingName)
		if not tableOfRecipes then
			return "Render_Recipe Error: no recipes found at building=" .. argBuildingName .. "."
		end
		
		local strToReturn = ""
		-- go through each recipe and just send it straight to the table renderer, since the place already matches
		for j, recipe in ipairs(tableOfRecipes) do
			
			if j > 1 then
				strToReturn = strToReturn .. NL -- separate tables with new lines
			end
			
			-- concatenate the tables together
			strToReturn = strToReturn .. RenderRecipe.renderTable(recipe)
		end
		
		return strToReturn
	
	-- something was bad about the arguments; can't print them since they may be nil
	else
		return "Render_Recipe Error: invalid template parameters. at least a product or building is required"
	end
	
	-- does not get here, all if/else resulted in returns
end



-- writes the wiki table markup to represent a recipe
-- takes a recipe table (pattern and place), and uses only the first place
function RenderRecipe.renderTable(tRecipe)

	if not tRecipe then
		return nil
	end
	
	-- call the helper functions to extract the data, make sure we have something usable,
	-- then get only the first values since we're assuming that there's only one top-level record in tRecipe
	local building, stars = RecipeData.getBuildingsAndStarsLists(tRecipe)
	if building and stars then
		building, stars = building[1], stars[1]
	else
		return "Render_Recipe Error: did not find building or stars in recipe."
	end
	
	local speed = RecipeData.getProductionSpeed(tRecipe)
	if speed then
		speed = speed[1]
	else
		return "Render_Recipe Error: did not find production speed in recipe."
	end
	
	local product, number = RecipeData.getProductAndNumbers(tRecipe)
	if product and number then
		number = number[1]
	else
		return "Render_Recipe Error: did not find product or output numbers in recipe."
	end
	
	-- need separate error checking, because ingredients is the same structure as EACH 
	-- of the top-level elements of quantities
	local ingredients, quantities = RecipeData.getIngredientsAndQuantities(tRecipe)
	if not ingredients or 0 == #ingredients then
		return "Render_Recipe Error: did not find ingredients in recipe."
	end
	-- just want the first values since we're assuming there's only one top-level record in tRecipe
	if quantities then
		quantities = quantities[1] -- now ingredients and quantities have the same structure
	else
		return "Render_Recipe Error: did not find quantities in recipe."
	end
	
	local wikiTable = "{| " .. CSS_CLASS_RECIPE_TABLE .. NL .. 
    "| " .. RenderRecipe.blTemplate(building) .. BR .. RenderRecipe.starTemplate(stars) .. BR .. speed .. NL
	
	-- looping over groups of alternative ingredients and quantities simultaneously, 
	-- so use local group and groupOfQuantities for each i
	for i, group in ipairs(ingredients) do
		local groupOfQuantities = quantities[i]
		
		-- on all but the first group, create a new cell with a + sign to separate ingredient groups
		if i > 1 then
			wikiTable = wikiTable .. NL .. "| + " .. NL
		end
		
		-- prefix the table cell based on whether there's only one (required) or more (swappable) ingredients
		-- in the group
		if 1 == #group then
			wikiTable = wikiTable ..
			"| " .. CSS_CLASS_REQUIRED_INGREDIENT .. " | "
		else
			wikiTable = wikiTable ..
			"| " .. CSS_CLASS_SWAPPABLE_INGREDIENT .. " | "
		end
		
		-- for every group, list out the required or alternatives within that group
		for j, alt in ipairs(group) do
			local quant = groupOfQuantities[j]
			
			-- need to add breaks only between the first and any subsequent options
			if j > 1 then
				wikiTable = wikiTable .. BR
			end
			
			wikiTable = wikiTable .. quant .. " " .. RenderRecipe.rlTemplate(alt) -- line breaks handled by above if statement and addition below for close
		end
		
	end
    
	wikiTable = wikiTable .. NL ..
	"| = " .. NL ..
	"| " .. number .. " " .. RenderRecipe.rlTemplate(product,"large") .. NL ..
	"|}"
	
    return wikiTable
end



-- redirect a rendering request to the recipe data and create appropriate 
-- templates for the list. The caller can decide how to output the list
function RenderRecipe.getBuildingsAndStarsForProduct(frame)

	local argProductName = frame.args.product
	
	-- make sure there's an argument to work with
	if not tableRecipe then
		return "Render_Recipe Error: no product given."
	end
	
	-- get the associated recipe data, including all buildings
	local tableRecipe = RecipeData.getAllRecipes(argProductName)
	-- make sure what's returned is valid before we loop through it
	if not tableRecipe or not tableRecipe.places or #tableRecipe.places < 1 then
		return "Render_Recipe Error: no recipes found"
	end
	
	local listOfTemplates = {}
	local buildings, stars = RecipeData.getBuildingsAndStarsLists(tRecipe)
	
	-- loop through the buildings and stars and build the templates
	for i, building in pairs(buildings) do
		listOfTemplates[i] = RenderRecipe.blTemplate(building) .. " " .. RenderRecipe.pstarTemplate(stars[i])
	end
	
	return listOfTemplates
end



-------------------------------------------------------------------------------
-- Helper rendering functions
-- these do not call member functions, but write out the actual templates
-- (which will in turn invoke the code. this is to protect variations in the
-- modules, but we may decide later it should be different)
-------------------------------------------------------------------------------
--use huge size for recipes unless speified
function RenderRecipe.blTemplate(strBuilding,strSize)
	
	if not strSize then
		strSize = "huge"
	end
	
	--return "{{" .. TEMPLATE_BUILDING_LINK .. "|" .. strBuilding .. "|" .. strSize .. "}}"
	return thisFrame:expandTemplate{ title=TEMPLATE_BUILDING_LINK, args={ strBuilding, strSize } }
end

-- use recipe-sized icons, "med", unless specified
function RenderRecipe.rlTemplate(strResource,strSize)
	
	if not strSize then
		strSize = "med"
	end
	
	--return "{{" .. TEMPLATE_RESOURCE_LINK .. "|" .. strResource .. "|" .. strSize .. "}}"
	return thisFrame:expandTemplate{ title=TEMPLATE_RESOURCE_LINK, args={ strResource, strSize } }
end

-- use the parentheses version, with "P"
function RenderRecipe.pstarTemplate(intStars)
	
	--return "{{P" .. intStars .. "star}}"
	return thisFrame:expandTemplate{ title= "P" .. intStars .. TEMPLATE_STAR_SUFFIX}
end

-- no parens version
function RenderRecipe.starTemplate(intStars)
	
	--return "{{" .. intStars .. "star}}"
	return thisFrame:expandTemplate{ title= intStars .. TEMPLATE_STAR_SUFFIX}
end



-------------------------------------------------------------------------------
-- Return when required into another Module.
-------------------------------------------------------------------------------
return RenderRecipe