--
-- Agario Checkers - Checkers-like game with inspiration from agar.io
-- Copyright (C) 2017-2018 Delwink, LLC
--
-- Redistributions, modified or unmodified, in whole or in part, must retain
-- applicable copyright or other legal privilege notices, these conditions, and
-- the following license terms and disclaimer.  Subject to these conditions,
-- the holder(s) of copyright or other legal privileges, author(s) or
-- assembler(s), and contributors of this work hereby grant to any person who
-- obtains a copy of this work in any form:
--
-- 1. Permission to reproduce, modify, distribute, publish, sell, sublicense,
-- use, and/or otherwise deal in the licensed material without restriction.
--
-- 2. A perpetual, worldwide, non-exclusive, royalty-free, irrevocable patent
-- license to reproduce, modify, distribute, publish, sell, use, and/or
-- otherwise deal in the licensed material without restriction, for any and all
-- patents:
--
--     a. Held by each such holder of copyright or other legal privilege,
--     author or assembler, or contributor, necessarily infringed by the
--     contributions alone or by combination with the work, of that privilege
--     holder, author or assembler, or contributor.
--
--     b. Necessarily infringed by the work at the time that holder of
--     copyright or other privilege, author or assembler, or contributor made
--     any contribution to the work.
--
-- NO WARRANTY OF ANY KIND IS IMPLIED BY, OR SHOULD BE INFERRED FROM, THIS
-- LICENSE OR THE ACT OF DISTRIBUTION UNDER THE TERMS OF THIS LICENSE,
-- INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR
-- A PARTICULAR PURPOSE, AND NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS,
-- ASSEMBLERS, OR HOLDERS OF COPYRIGHT OR OTHER LEGAL PRIVILEGE BE LIABLE FOR
-- ANY CLAIM, DAMAGES, OR OTHER LIABILITY, WHETHER IN ACTION OF CONTRACT, TORT,
-- OR OTHERWISE ARISING FROM, OUT OF, OR IN CONNECTION WITH THE WORK OR THE USE
-- OF OR OTHER DEALINGS IN THE WORK.
--

function functionize(v)
   if type(v) ~= 'function' then
      return function(self) return v end
   end

   return v
end

function string:startswith(pattern)
   return self:sub(1, pattern:len()) == pattern
end

function string:split(delim)
   local out = {}
   local last = 1

   for i = 1, #self do
      local c = self:sub(i, i)
      if c == delim then
         table.insert(out, self:sub(last, i - 1))
         last = i + 1
      end
   end

   return out
end

function string:fitwidth(w, font)
   local i = 0
   local s

   repeat
      i = i + 1
      s = self:sub(1, i)
   until i > self:len() or font:getWidth(s) > w

   if i == 1 then
      return ''
   end

   i = i - 1
   return self:sub(1, i)
end