Table 2 Json And Json 2 Table (Mostly for debugging) with pretty print | 🏆 Luau Showcase

Table 2 Json And Json 2 Table (Mostly for debugging) with pretty print

WolfGang Senizen

Table 2 Json

A quick and dirty method for dumping a table into a string

function table2json(tbl,depth)
    if depth == true then depth = 1 end
    local set = {}
    local obj = false;
    local frst = 0
    for k,v in pairs(tbl) do
        if k ~= (frst + 1) then
            obj = true
            break
        end
        frst = frst + 1
    end
    for k , v in pairs(tbl) do
        local t = type(v)
        if t == "number" then v = `{v}`
        elseif v == nil then v = `null`
        elseif t == "table" then v = table2json(v,depth and depth+1 or false)
        elseif t == "function" then v = `"function<{debug.info(v,"n")}>"`
        else v = `"{v}"` end
        if obj then
            v = `"{k}":{v}`
        end
        set[#set+1] = v
    end
    local sep = ","
    if obj then 
        if depth then 
            sep = ",\n"
            sep = sep .. string.rep("  ",depth*2)
            set = sep:sub(2) .. table.concat(set,sep) .. sep:sub(2,#sep - 4)
        else
            set = table.concat(set,sep)
        end
        return `\{{set}\}`
    end
    return `[{table.concat(set,sep)}]`
end

can be called like this

local tbl = {`a`,2,uuid("677bf9a4-bba5-4cf9-a4ad-4802a0f7ef46"),{`b`,`c`,{`d`,`e`,vector(1,1,1)}},a=`7`,{x=1,y=2,z=3},ll.Say}
ll.OwnerSay(table2json(tbl))
ll.OwnerSay(table2json(tbl,true))

passing true or a number into the second argument enables indentation / pretty print

Json 2 Table

a crude v1 of json 2 table

local function json2table(json)
    local tb = ll.Json2List(json)
    for k,v in pairs(tb) do
        if type(v) == "string" then
            local t = ll.JsonValueType(v,{});
            if t == utf8.char(0xFDD2) then
                tb[k] = json2table(v)
            elseif t == utf8.char(0xFDD1) then
                local obj = json2table(v)
                v = {}
                for i = 1, #obj, 2 do
                    v[obj[i]] = obj[i+1]
                end
                tb[k] = v
            end
        end
    end
    return tb
end

4 days ago

WolfGang Senizen

Working with SamanthaTekcat Resident yesterday

We came up with functions similar to

llJsonSetValue

and

llJsonGetValue

setTableVal

local function setTableVal(tab,path,val)
    for k,v in pairs(path) do
        if k == #path then break end
        if type(tab[v]) == nil then tab[v] = {} end
        tab = tab[v]
        if type(tab) ~= "table" then return false end
    end
    tab[path[#path]] = val
end

And

getTableVal

local function getTableVal(tab,path)
    for k,v in pairs(path) do
        tab = tab[v]
        if tab == nil then return nil end
    end
    return tab
end

As helper lua functions for those

They aren't identical as they modify the table in place, and don't quite support the

JSON_DELETE

type of functionality, you can pass

nil

but that's a bit different