Module:WorkshopsData

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

---
-- Module for compiling goods (or resources as some call them) information from 
-- wiki data sources.
--
-- @module WorkshopsData
local WorkshopsData = {}

---
-- Dependencies
---
local CsvUtils = require("Module:CsvUtils")

---
-- Constants for this module
---
local WORKSHOPS_DATA_TEMPLATE_NAME = "Template:Workshops_csv"

local INDEX_WORKSHOP_ID = 1
local INDEX_WORKSHOP_NAME = 2
local INDEX_WORKSHOP_DESCRIPTION = 3
local INDEX_WORKSHOP_CATEGORY = 4
local INDEX_WORKSHOP_SIZE_X = 5
local INDEX_WORKSHOP_SIZE_Y = 6
local INDEX_WORKSHOP_CITY_SCORE = 7
local INDEX_WORKSHOP_MOVABLE = 8
local INDEX_WORKSHOP_INITIALLY_ESSENTIAL = 9
local INDEX_WORKSHOP_STORAGE = 10
local INDEX_WORKSHOP_CONSTRUCTION_TIME = 11
local INDEX_WORKSHOP_REQUIRED_GOODS = 12
local INDEX_WORKSHOP_WORKPLACES = 13
local INDEX_WORKSHOP_RECIPES = 14

local HEADER_ROW = 1
local DATA_ROWS = 2

local PATTERN_SPLIT_STACK_AND_ID = "(%d+)%s([%[%]%s%a]+)"


---
-- Private member variables
---

-- Main data tables. Populated from CSV data and organized better for Lua.

-- like this: table[workshopID] = table containing workshops data
local workshopsTable

-- Lookup map. Built once and reused on subsequent calls
-- like this:  table[display name] = workshopID
local workshopNameToWorkshopID



---
-- Data loader function. Calls the data templates, restructures the data to be
-- useful for getter methods, and makes a merge table.
--
-- This method is called the first time any of the actual template methods are
-- invoked and they see that the data tables are nil. This method populates
-- them and reorganizes them for easier use (and easier code).
function loadData()
	
	-- Use the CSV utility module to load the data templates we need for 
	-- resources.
	local originalWorkshopsTable, workshopsHeaderLookup = CsvUtils.luaTableFromCSV(CsvUtils.extractCSV(WORKSHOPS_DATA_TEMPLATE_NAME))
	
	-- Now restructure the table so subtables can be passed to member functions 
	-- for cleaner code.
	workshopsTable = restructureWorkshopTable(originalWorkshopsTable, workshopsHeaderLookup)
end



---
-- Retrieve all data for the specified workshop. Returned items look like this:
-- workshop {
-- 		id
--		display name
--		description
--		category
--		size x
--		size y
--		city score
--		movable
--		initially essential
--		storage
--		construction time
--		required goods (just their IDs) {
--			#1 { stack size, id }
--			#2 { stack size, id }
--			#3 { stack size, id }
--		}
--		workplaces {
--			workplace #1
--			workplace #2
--			workplace #3
--			workplace #4
--		}
--		recipes (just their IDs) {
--			recipe #1
--			recipe #2
--			recipe #3
--			recipe #4
--		}
-- }
-- 
-- @param workshopName plain language name of the workshop
-- @return a table containing the data for the specified workshop
function WorkshopsData.getAllDataForWorkshop(workshopName)
	
	if not workshopsTable then
		loadData()
	end
	
	local targetWorkshopID = findWorkshopIDByName(workshopName)
	if not targetWorkshopID then
		error("No building found. Please check spelling and any punctuation like an apostrophe: " .. workshopName)
	end
	
	return workshopsTable[targetGoodID]
end



---
-- Transforms the oldWorkshopsTable returned from CSV processing to be more 
-- conducive to member functions looking up data. Essentially, we convert the 
-- text strings into tables with the same base name and an index.
-- 
-- @param oldRecipeTable the CSV-based table, with a header row then data rows
-- @param recipeHeaderLookup the lookup table built from the CSV data
-- @return a new table for use in looking up recipe data
function restructureWorkshopTable(oldWorkshopTable, workshopsHeaderLookup)
	
	-- New table structure is only data rows, no header row needed. Therefore, 
	-- the new table is one degree flatter, like this:
	-- oldWorkshopTable[2][1] contains the same data as newWorkshopTable[1]
	-- (but organized by workshopID instead of by index and with subtables)
	local newWorkshopTable = {}
	oldWorkshopTable = oldWorkshopTable[DATA_ROWS]
	
	-- A few constants we need only in this function.
	local INDEX_OLD_WORKSHOP_ID = 1
	local INDEX_OLD_WORKSHOP_NAME = 2
	local INDEX_OLD_WORKSHOP_DESCRIPTION = 3
	local INDEX_OLD_WORKSHOP_CATEGORY = 4
	local INDEX_OLD_WORKSHOP_SIZE_X = 5
	local INDEX_OLD_WORKSHOP_SIZE_Y = 6
	local INDEX_OLD_WORKSHOP_CONSTRUCTION_TIME = 10
	local INDEX_OLD_WORKSHOP_CITY_SCORE = 11
	local INDEX_OLD_WORKSHOP_MOVABLE = 12
	local INDEX_OLD_WORKSHOP_INITIALLY_ESSENTIAL = 13
	local INDEX_OLD_WORKSHOP_STORAGE = 14
	
	for i, oldWorkshop in ipairs(oldWorkshopTable) do
		
		local newWorkshop = {}
		
		-- Copy over the flat information from the old recipe.
		local newWorkshopID = oldWorkshop[INDEX_OLD_WORKSHOP_ID]
		newWorkshop[INDEX_WORKSHOP_ID] = newWorkshopID
		newWorkshop[INDEX_WORKSHOP_NAME] = oldWorkshop[INDEX_OLD_WORKSHOP_NAME]
		newWorkshop[INDEX_WORKSHOP_DESCRIPTION] = oldWorkshop[INDEX_OLD_WORKSHOP_DESCRIPTION]
		newWorkshop[INDEX_WORKSHOP_CATEGORY] = oldWorkshop[INDEX_OLD_WORKSHOP_CATEGORY]
		newWorkshop[INDEX_WORKSHOP_SIZE_X] = oldWorkshop[INDEX_OLD_WORKSHOP_SIZE_X]
		newWorkshop[INDEX_WORKSHOP_SIZE_Y] = oldWorkshop[INDEX_OLD_WORKSHOP_SIZE_Y]
		newWorkshop[INDEX_WORKSHOP_CITY_SCORE] = oldWorkshop[INDEX_OLD_WORKSHOP_CITY_SCORE]
		newWorkshop[INDEX_WORKSHOP_MOVABLE] = oldWorkshop[INDEX_OLD_WORKSHOP_MOVABLE]
		newWorkshop[INDEX_WORKSHOP_INITIALLY_ESSENTIAL] = oldWorkshop[INDEX_OLD_WORKSHOP_INITIALLY_ESSENTIAL]
		newWorkshop[INDEX_WORKSHOP_STORAGE] = oldWorkshop[INDEX_OLD_WORKSHOP_STORAGE]
		newWorkshop[INDEX_WORKSHOP_CONSTRUCTION_TIME] = oldWorkshop[INDEX_OLD_WORKSHOP_CONSTRUCTION_TIME]
		
		newWorkshop[INDEX_WORKSHOP_REQUIRED_GOODS] = makeRequiredGoodsSubtable(oldWorkshop, workshopsHeaderLookup)
		newWorkshop[INDEX_WORKSHOP_WORKPLACES] = makeWorkplacesSubtable(oldWorkshop, workshopsHeaderLookup)
		newWorkshop[INDEX_WORKSHOP_RECIPES] = makeRecipesSubtable(oldWorkshop, workshopsHeaderLookup)
		
		newWorkshopTable[newWorkshopID] = newWorkshop
	end
	
	return newWorkshopTable
end



---
-- Loops through the old workshop, extracting req'd goods and putting them
-- into a new subtable. Uses the lookup table from the CSV extraction to 
-- keep the data in the same order.
--
-- @param oldWorkshop the workshop from which to extract req'd goods information
-- @param workshopsHeaderLookup the lookup table built from the CSV data
-- @return a subtable with the req'd goods information from oldWorkshop
function makeRequiredGoodsSubtable(oldWorkshop, workshopsHeaderLookup)
	
	-- A few constants we'll need only within this function.
	local REQ_GOOD_MAX = 3
	local LOOKUP_REQ_GOOD_BASE_STRING = "requiredGood"
	
	-- A subtable to return
	local requiredGoods = {}
	for i = 1,REQ_GOOD_MAX do
		
		local oldIndex = workshopsHeaderLookup[LOOKUP_REQ_GOOD_BASE_STRING .. i]
		
		local newGroup = {}
		-- Split the digit part into the req'd good stack size and the rest 
		-- of the text into the req'd good's id.
		newGroup[1], newGroup[2] = oldWorkshop[oldIndex]:match(PATTERN_SPLIT_STACK_AND_ID)
		table.insert(requiredGoods, newGroup)
	end
	
	return requiredGoods
end



---
-- Loops through the old workshop, extracting workplaces and putting them
-- into a new subtable. Uses the lookup table from the CSV extraction to 
-- keep the data in the same order.
--
-- @param oldWorkshop the workshop from which to extract workplaces information
-- @param workshopsHeaderLookup the lookup table built from the CSV data
-- @return a subtable with the workplaces information from oldWorkshop
function makeWorkplacesSubtable(oldWorkshop, workshopsHeaderLookup)
	
	-- A few constants we'll need only within this function.
	local WORKPLACE_MAX = 4
	local LOOKUP_WORKPLACE_BASE_STRING = "workplace"
	
	-- A subtable to return
	local workplaces = {}
	
	for i = 1,WORKPLACE_MAX do
		
		local oldIndex = workshopsHeaderLookup[LOOKUP_WORKPLACE_BASE_STRING .. i]
		workplaces[i] = oldWorkshop[oldIndex]
	end
	
	return workplaces
end



---
-- Loops through the old workshop, extracting recipes and putting them
-- into a new subtable. Uses the lookup table from the CSV extraction to 
-- keep the data in the same order.
--
-- @param oldWorkshop the workshop from which to extract recipes
-- @param workshopsHeaderLookup the lookup table built from the CSV data
-- @return a subtable with the recipes from oldWorkshop
function makeRecipesSubtable(oldWorkshop, workshopsHeaderLookup)
	
	-- A few constants we'll need only within this function.
	local RECIPE_MAX = 4
	local LOOKUP_RECIPE_BASE_STRING = "recipe"
	
	-- A subtable to return
	local recipes = {}
	
	for i=1,RECIPE_MAX do
		
		local oldIndex = workshopsHeaderLookup[LOOKUP_RECIPE_BASE_STRING .. i]
		recipes[i] = oldWorkshop[oldIndex]
	end
	
	return recipes
end



---
-- Look up so workshops can be found by their common ID, rather than their 
-- display name, which people are more familiar with.
-- 
-- Uses the display name provided to look up the associated ID for the workshop.
-- Builds a lookup table the first time it's called so it only has to happen
-- once.
--
-- @param displayName the plain-language name of the workshop to find
-- @return the ID of the workshop found, or nil if not found
function findWorkshopIDByName(displayName)
	
	if not workshopTable then
		loadData()
	end
	
	local foundWorkshopID = nil
	-- Decide whether we need to traverse the big table. If this isn't the first 
	-- time this method is called, we won't have to build the table again, we 
	-- can just look it up.
	if not workshopNameToWorkshopID then
	
		workshopNameToWorkshopID = {}
		
		for workshopID, workshop in pairs(workshopTable) do
			
			if not foundWorkshopID and workshop[INDEX_WORKSHOP_NAME] == displayName then
				-- Found it, but keep traversing to build the rest of the map.
				foundWorkshopID = workshopID
			end
			
			workshopNameToWorkshopID[workshop[INDEX_WORKSHOP_NAME]] = workshopID
		end
	else
		-- From the lookup table.
		foundWorkshopID = workshopNameToWorkshopID[displayName]
	end
	
	return foundWorkshopID
end



---
-- Retrieves the name and icon filename for a workshop.
--
-- @param workshopID the ID of the workshop to look up
-- @return display name, icon filename
function WorkshopsData.getWorkshopNameAndIcon(workshopID)
	
	if not workshopTable then
		loadData()
	end
	
	local workshop = workshopTable[workshopID]
	
	if not workshop then
		error("ID for workshop not found to look up name and icon: " .. workshopID)
	end
	
	return workshop[INDEX_WORKSHOP_NAME], workshop[INDEX_WORKSHOP_NAME] .. "_icon"
end



return WorkshopsData