neyuki 0.6.3

-- A to-do list on the command line, kept in a JSON file next to where it runs.
--
--   neyuki todo.nyk add "water the plants"
--   neyuki todo.nyk done 1
--   neyuki todo.nyk

local fs = require("@neyuki/fs")

const FILE = "todo.json"

local function load(): {any}
    if not fs.exists(FILE) then return {} end
    return json.decode(fs.read(FILE))
end

local function save(items: {any})
    fs.write(FILE, json.encode(json.array(items), { indent = 2 }))
end

local items = load()
local command, argument = os.args()[1], os.args()[2]

if command == "add" and argument != nil then
    items[#items + 1] = { text = argument, done = false, added = os.date("%Y-%m-%d") }
    save(items)
    print(`added #{#items}: {argument}`)
elseif command == "done" and tonumber(argument) != nil then
    local item = items[tonumber(argument)]
    if item == nil then
        print(`there is no item #{argument}`)
        os.exit(1)
    end
    item.done = true
    save(items)
    print(`done: {item.text}`)
elseif command == nil then
    if #items == 0 then print("nothing to do") end
    for index, item in items do
        local mark = item.done and "x" or " "
        print(`[{mark}] {index}. {item.text}  ({item.added})`)
    end
else
    print("usage: neyuki todo.nyk [add <text> | done <number>]")
    os.exit(1)
end