-- The MIT License (MIT)
--
-- Copyright © 2026 Scott E. Graves <scott.e.graves@protonmail.com>
--
-- Permission is hereby granted, free of charge, to any person obtaining a copy of this software
-- and associated documentation files (the “Software”), to deal in the Software without restriction,
-- including without limitation the rights to use, copy, modify, merge, publish, distribute,
-- sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
-- furnished to do so, subject to the following conditions:
--
-- The above copyright notice and this permission notice shall be included in all copies or
-- substantial portions of the Software.
--
-- THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
-- BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-- NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
--
function string:contains(str)
  return self:find(str, 1, true) ~= nil
end

function string:ends_with(suffix)
  return suffix == "" or self:sub(-(#suffix)) == suffix
end

function string:split(sep)
  sep = sep or ":"
  local fields = {}
  local pattern = string.format("([^%s]+)", sep)
  _ =
    self:gsub(
    pattern,
    function(c)
      fields[#fields + 1] = c
    end
  )
  return fields
end

function string:starts_with(prefix)
  return self:sub(1, #prefix) == prefix
end