/phpy/drafts/phpy_1.py

#Python Hypertext Preprocessor (First iteration: Not functional)

#Author: Anson Rosenthal (anrosent)

#10/2013



import sys



#next move is to make print statements redirect to capture print output in node

#   using AST

# also clean up parser



class ParseNode():

    def __init__(self, string, first, delim):

        buf = [first]

        for c in string:

            if c == delim:

                break

            buf.append(c)

        self.string = ''.join(buf)



    def generate(self):

        pass

        

class Text(ParseNode):

    def __init__(self, string, first, delim):

        ParseNode.__init__(self, string, first, delim)

        

    def generate(self):

        return self.string

        

class Code(ParseNode):

    def __init__(self, string, first, delim):

        ParseNode.__init__(self, string, first, delim)

        

    def generate(self):

        return str(eval(self.string))



class PyHPP():

    def __init__(self):

        self.buffer = None

        self.parse_seq = []

        self.delim = '#'

        self.in_code = False

        self.done = False

    

    def parse_full(self, string):

        nodes = []

        self.in_code = string[0] != self.delim

        self.buffer = iter(string)

        for c in self.buffer:

            if self.in_code:

                nodes.append(Text(self.buffer, c, self.delim))

            else:

                nodes.append(Code(self.buffer, c, self.delim))

            self.in_code = not self.in_code

            

        return ''.join(map(lambda node:node.generate(), nodes))

            

    # def advance(self):

        # self.buffer.__next__()

    

    # def parse(self,string):

        # splits = string.split(self.delim)

        # text_first = int((string[0] != self.delim))

        # splits[text_first::2] = map(str, map(eval, splits[text_first::2]))

        # return ''.join(splits)

        

if __name__ == '__main__':

    with open(sys.argv[1]) as inputfile:

        a = PyHPP()

        print(a.parse_full(inputfile.read()))