#! /usr/bin/env ruby

@outputFiles = []

def makeHeaderFileFrom(fileName)
  # Grab the entire file (text)
  data = File.new(fileName).read
  
  # Extract out all the "implementation" lines.  Note, there may be
  # more than on in a given .j file.
  m = data.scan(/.*?(@implementation.*?\{.*?\})/m)
  if m.length > 0
    for i in 0...m.length
      line = m[i][0]
    
      # Skip category definitions
      if not /.*?\(.*?\).*?\{/m.match(line)
      
        # Extract the class name
        m2 = line.scan(/.*?@implementation(.*?):.*/m)
        if !m2.nil? && !m2[0].nil?
          className = m2[0][0].strip()
        
          # Change "implementation" to "interface", create the .h file, and write the interface
          newLine = line.sub("implementation", "interface")
          newFileName = File.dirname(fileName) + "/" + className + ".h"
          f = File.new(newFileName, "w")
          f.write(newLine + "\n@end")
          f.close()
          
          @outputFiles.push(newFileName)
        end
      end
    end
  end
end


fileList = Dir['AppKit/**/*.j'] + Dir['Foundation/**/*.j']
for fileName in fileList
  makeHeaderFileFrom(fileName)
end

for fileName in @outputFiles
  File.delete(fileName)
end