helpers.lua

local mp = require('mp')
local utils = require('mp.utils')
local Helpers = {}

function Helpers:exp(path)
    return mp.command_native({"expand-path", path})
end

function Helpers:path_sep()
    return package.config:sub(1, 1)
end

function Helpers:on_windows()
    return Helpers:path_sep() == "\\"
end

function Helpers:shallow_copy(t)
    local t2 = {}
    for k,v in pairs(t) do
        t2[k] = v
    end
    return t2
end

function Helpers:index_of(array, key)
    for i, key2 in ipairs(array) do
        if key2 == key then
            return i
        end
    end
end

function Helpers:cycle(current, max, step, wrap)
    current = current + step
    if current < 1 then
        return wrap and max or 1
    elseif current > max then
        return wrap and 1 or max
    else
        return current
    end
end

function Helpers:snake_case(name)
    return name:gsub(" ", "_"):lower()
end

function Helpers:path_exists(path)
    local f = io.open(path, "r")
    if f == nil then return false end
    io.close(f)
    return true
end

function Helpers:read_json(path)
    local f = assert(io.open(Helpers:exp(path), "r"))
    local data = f:read("*all")
    f:close()
    return assert(utils.parse_json(data))
end

function Helpers:mkdir(path)
    if Helpers:path_exists(path) then return end

    local args = {"mkdir", "-p", path}
    if Helpers:on_windows() then
        local path2, _count = path:gsub("/", "\\")
        args = {"cmd", "/c", "mkdir", path2}
    end

    local result, error = mp.command_native({
        name = "subprocess", playback_only = false, args = args,
    })
    if error then print("Error creating folder", path, "-", error) end
end

function Helpers:write_file(path, data)
    path = Helpers:exp(path)
    local dir, _fname = utils.split_path(path)
    Helpers:mkdir(dir)
    local f = assert(io.open(path, "w"))
    f:write(data)
    f:close()
end

function Helpers:write_json(path, table)
    Helpers:write_file(path, assert(utils.format_json(table)))
end

return Helpers