122 lines
3.9 KiB
Lua
122 lines
3.9 KiB
Lua
-- datapack.lua :: a categorized and indexed pack of data. Aim to make easy to get
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-- the category from an element, without having
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--[[
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Copyright © 2021 Kazhnuz
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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the Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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]]
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local DataPack = Object:extend()
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local UNCATEGORIZED = "uncategorized"
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function DataPack:new(foldername, categories, areFiles, subfiles)
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self.foldername = foldername
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self.areFiles = (areFiles ~= false)
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self.subfiles = subfiles or {}
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self.categories = categories or {}
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--print("loading " .. foldername)
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self:loadAllDatas()
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end
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function DataPack:getBaseDirectory(lua)
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local foldername = self.foldername
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if (not lua) then
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foldername = string.gsub(foldername, "%.", "/")
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end
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return utils.datas.concatDataFolder(foldername, lua)
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end
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function DataPack:getCategoryDirectory(category, lua)
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if (category == UNCATEGORIZED) then
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return self:getBaseDirectory(lua)
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else
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return utils.datas.concatFolder(self:getBaseDirectory(lua), category, lua)
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end
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end
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function DataPack:haveCategories()
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return (#self.categories > 0)
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end
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function DataPack:loadAllDatas()
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self.index = {}
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self.reverseIndex = {}
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if (self:haveCategories()) then
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for i, category in ipairs(self.categories) do
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self:loadDatas(category)
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end
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else
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self:loadDatas(UNCATEGORIZED)
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end
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end
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function DataPack:loadDatas(category)
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local directory = self:getCategoryDirectory(category)
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local items = love.filesystem.getDirectoryItems(directory)
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self.reverseIndex[category] = {}
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for i, filename in ipairs(items) do
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if (utils.datas.isLuaFile(filename) == self.areFiles) then
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if (self.areFiles) then
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filename = utils.datas.luaFileToModule(filename)
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end
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if (self.index[filename] ~= nil) then
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error("Data " .. filename .. " already exists for " .. self.foldername)
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end
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--print("loading " .. filename .. " from category " .. category .. " for " .. self.foldername)
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self.index[filename] = category
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table.insert(self.reverseIndex[category], filename)
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end
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end
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end
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function DataPack:dataExists(name)
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return (self.index[name] ~= nil)
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end
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function DataPack:getPath(name, lua)
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if (not self:dataExists(name)) then
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error("Data " .. name .. " do not exist for " .. self.foldername)
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end
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local category = self.index[name]
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local categoryDirectory = self:getCategoryDirectory(category, true)
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return utils.datas.concatFolder(categoryDirectory, name, lua)
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end
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function DataPack:get(name)
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local path = self:getPath(name, true)
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local data = utils.datas.copy(path)
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if (not self.areFiles) then
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for i, subfile in ipairs(self.subfiles) do
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data[subfile] = utils.datas.copyDataset(path, subfile)
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end
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end
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return data
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end
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function DataPack:getFromCategory(category)
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return self.reverseIndex[category] or {}
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end
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return DataPack
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