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

local M = {}

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

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

function M.autocmd(group, event, pattern, opts)
  if type(opts) == "function" then
    local func = opts
    opts = {
      callback = function(_)
        func()
      end,
    }
  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

function M.prune_files(path, days)
  local sunset = os.time() - (days * 86400)
  path = vim.fs.normalize(path)

  if fn.getftype(path) == "" then return end

  for fname, type in vim.fs.dir(path) do
    local fpath = vim.fs.normalize(path .. "/" .. fname)
    if type == "file" and fn.getftime(fpath) < sunset then
      os.remove(fpath)
    end
  end
end

return M