local yaml  = require("yaml")
local loader = {}
loader.__index = loader

function loader:new(path_or_file)
    local c = {}
    setmetatable(c, loader)
    c.source = path_or_file
    local file = io.open(path_or_file .. "/index.yaml","r")
    if not file then 
        error("Unable to load file: ".. path_or_file .."/index.yaml")
    end
    c.index = yaml.parse(file:read("*a"))
    for i,v in pairs(c.index.categories) do
        local link = io.open(path_or_file .. "/" .. v.name .. ".yaml")
        if not link then
            print("Error! Cannot find file: " .. path_or_file .."/" .. v.name .. ".yaml")
        else
            local category = yaml.parse(link:read("*a"))
            c.index.categories[i].questions = category.questions
        end
    end
    return c
end

function loader:getCategories()
    return self.index.categories
end

function loader:getSettings()
    return self.index.settings
end

return loader