.config/nvim/lua/config/util.lua

local M = {}

local api, fn = vim.api, vim.fn

--- Bulk-define aliases.
---@param aliases table<string, string>
function M.calias(aliases)
  for abbrev, expand in pairs(aliases) do
    vim.cmd.cnoreabbrev(
      string.format(
        [[<expr> %s (getcmdtype() == ":" && getcmdline() == "%s") ? "%s" : "%s"]],
        abbrev,
        abbrev,
        expand,
        abbrev
      )
    )
  end
end

--- Shortcut for autocmd creation.
--- @param group string | number
--- @param event string | string[]
--- @param pattern string | string[]
--- @param opts table | string | fun(ctx) `nvim_create_autocmd` options OR a function for the `callback` option OR a string for the command option
function M.autocmd(group, event, pattern, opts)
  if type(opts) == "function" then
    opts = { callback = opts }
  elseif type(opts) == "string" then
    opts = { command = opts }
  end

  api.nvim_create_autocmd(
    event,
    vim.tbl_extend("keep", opts, {
      group = group,
      pattern = pattern,
    })
  )
end

function M.safe_filter_file(cmd)
  local errorfile = fn.tempname()
  vim.cmd([[silent %!]] .. cmd .. [[ 2>]] .. fn.shellescape(errorfile))
  if vim.v.shell_error ~= 0 then
    vim.cmd("silent undo")
    api.nvim_err_write(io.open(errorfile):read("*a"))
  end
  fn.delete(errorfile)
end

function M.last_modified_days(fname)
  return (os.time() - vim.fn.getftime(fname)) / 86400
end

return M