查看“Module:Rotaeno Data”的源代码

local lang = mw.language.getContentLanguage()
local p = {}

local function songClosure(info)
    -- 返回一个函数用于查询内容。
    return function(key)
        -- 如果info无值即无法在songlist中查找到索引值，则返回nil。

        if info == nil then return nil end

        -- 此处定义一个switch table以达到switch函数的效用。如果需要查找的参数在switch中不存在，返回nil。
        local switch = {
            ["id"] = function() return info["id"] end,
            ["title"] = function()
                return info['title_localized']['default']
            end,
            ["title-en"] = function()
                return info['title_localized']['en']
            end,
            ["title-zh-Hans"] = function()
                return info['title_localized']['zh-Hans']
            end,
            ["title-zh-Hant"] = function()
                return info['title_localized']['zh-Hant']
            end,
            ["title-ja"] = function()
                return info['title_localized']['ja']
            end,
            ["title-ko"] = function()
                return info['title_localized']['ko']
            end,
            ["title-list"] = function()
                local list = {}
                for i, k in pairs(info['title_localized']) do
                    if k ~= nil and k ~= "" and k ~= info['title_localized']['default'] and
                        k ~= "en" then
                        table.insert(list, "英文" .. ":" .. "-{" .. k .. "}-")
                    end
                end

                if list[1] then
                    return table.concat(list, " | ")
                else
                    return nil
                end
            end,
            ["artist"] = function() return info["artist"] end,

            -- Rotaeno谱师在v2.0.0后可能不同难度不同，这里为了兼容性保留
            ["ChartDesigner"] = function()
                return info["difficulties"][1]['chartDesigner']
            end,
            ["ChartDesigner1"] = function()
                return info["difficulties"][1]['chartDesigner']
            end,
            ["ChartDesigner2"] = function()
                return info["difficulties"][2]['chartDesigner']
            end,
            ["ChartDesigner3"] = function()
                return info["difficulties"][3]['chartDesigner']
            end,
            ["ChartDesigner4"] = function()
                return info["difficulties"][4]['chartDesigner']
            end,
            ["ChartDesignerA"] = function()
                if info["difficulties"][5] then
                    return info["difficulties"][5]['chartDesigner']
                end
            end,
            -- Rotaeno画师目前都一样，所以随便找一个读取
            ["JacketDesigner"] = function()
                return info["difficulties"][1]['jacketDesigner']
            end,
            ["source"] = function()
                if info['source_localized'] then
                    return info['source_localized']['default']
                end
            end,
            ["rating1"] = function()
                return info["difficulties"][1]['ratingReal']
            end,
            ["rating2"] = function()
                return info["difficulties"][2]['ratingReal']
            end,
            ["rating3"] = function()
                return info["difficulties"][3]['ratingReal']
            end,
            ["rating4"] = function()
                return info["difficulties"][4]['ratingReal']
            end,
            ["ratingA"] = function()
                if info["difficulties"][5] then
                    return info["difficulties"][5]['ratingReal']
                end
            end
        }

        if info["difficulties"] == nil or info["difficulties"][1] == nil then
            mw.log("尝试检索参数：" .. key)
            mw.log("Songlist.json出现数据缺漏，终止全部数据检索。请使用参数填充。")
            return nil
        end

        if switch[key] == nil then
            mw.log('未定义的索引类型，请检查是否拼写错误。')
            return nil
        end

        return switch[key]()
    end
end

-- 传入JSON文件，索引值和索引值类型（索引是ID还是曲名）。分析JSON文件以获得曲目信息，返回的是一个查找单一曲目中信息的函数。仅获取单一曲目的信息。table中的索引名请查看下方switch表。
-- Songlist是以数字为索引值，因此遍历Songlist，直到发现需要找的曲目，将信息存入info变量中。
-- 如果模式是ID则遍历songlist直至发现id值为索引值为止，并获取内容。曲名同理。
local function findFirstByTitle(src, title)
    title = lang:lc(title)
    for _, k in ipairs(src) do
        if lang:lc(k['title_localized']['default']) == title then return k end
    end
end

local function findFirstById(src, id)
    for _, k in ipairs(src) do
        if k['id'] == id then return k end
    end
end

function p.singleSongInformation(index, indexTyped)
    -- 传入曲名或ID，获得一个查阅信息的函数。直接在下一个模块使用。
    -- index:曲目的索引字符串，和typed一致  indexTyped:id或name，查找曲目的索引值类型
    local findFirst = indexTyped == "id" and findFirstById or findFirstByTitle
    local append = findFirst(
        mw.text.jsonDecode(mw.title.new('Songlist append.json', 'Template'):getContent())['songs'],
        index)
    if append ~= nil then return songClosure(append) end
    append = findFirst(
        mw.text.jsonDecode(mw.title.new('Songlist.json', 'Template'):getContent())['songs'],
        index)
    if append == nil then mw.log('无法在Songlist中发现目标,索引值为:' .. index) end
    return songClosure(append)
end

return p