解析 Lua 文件的脚本

我有一个来自 XMPP Prosody 服务器的文件，记录了一个房间中的消息。这个文件看起来像这样：

item({
    {
        "Test1";
        ["attr"] = {};
        ["name"] = "body";
    };
    {
        ["name"] = "origin-id";
        ["attr"] = {
            ["id"] = "36cface5-e780-4594-b859-03ff635263bc";
            ["xmlns"] = "urn:xmpp:sid:0";
        };
    };
    ["with"] = "message<groupchat";
    ["name"] = "message";
    ["when"] = 1565197939;
    ["key"] = "U5KzbmuUEQN4QCIN";
    ["attr"] = {
        ["stamp_legacy"] = "20190807T17:12:19";
        ["type"] = "groupchat";
        ["to"] = "help@room.myserver.com";
        ["from"] = "help@room.myserver.com/myusername";
        ["id"] = "36cface5-e780-4594-b859-03ff635263bc";
        ["stamp"] = "2019-08-07T17:12:19Z";
        ["xml:lang"] = "en";
    };
});
item({
    {
        "Test 2\n";
        ["attr"] = {};
        ["name"] = "body";
    };
    {
        ["name"] = "origin-id";
        ["attr"] = {
            ["id"] = "fc944764-2fd3-4102-a5d0-1572163baa2b";
            ["xmlns"] = "urn:xmpp:sid:0";
        };
    };
    ["with"] = "message<groupchat";
    ["name"] = "message";
    ["when"] = 1565198050;
    ["key"] = "DH3THj8R4QcIkFsm";
    ["attr"] = {
        ["stamp_legacy"] = "20190807T17:14:10";
        ["type"] = "groupchat";
        ["to"] = "help@room.myserver.com";
        ["from"] = "help@room.myserver.com/myusername";
        ["id"] = "fc944764-2fd3-4102-a5d0-1572163baa2b";
        ["stamp"] = "2019-08-07T17:14:10Z";
        ["xml:lang"] = "en";
    };
});

我想创建一个 bash 脚本来创建一个像这样的文件：

日期、小时、用户名、消息
日期、小时、用户名、消息
日期、小时、用户名、消息

这样更容易阅读讨论。

这意味着它应该为每个项目选择：

对于日期、小时：["stamp"]
对于用户名：["from"]
对于消息：位于第一个引号之间，例如 "Test1" 或 Test 2\n

我不知道如何做到这一点。sed？awk？还是其他什么？