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# -*- coding: utf-8 -*-
import StringIO
import hashlib
import os
import os.path
import zlib
import datetime
class Object :
##
# Save the object on the disk.
def save( self ) :
header = "author " + self.author + "\n"
header += "parent " + self.parent + "\n"
header += "created " + self.created + "\n"
header += "#\n" #end of header
store = header + self.content
# if object was never stored, it doesn't have a name attribute
# so we hash it contents
if not hasattr( self, "name" ) :
self.name = hashlib.sha1( store ).hexdigest()
path = self.name[:2] + '/' + self.name[2:]
if ( not os.path.exists( self.name[:2] ) ) :
os.mkdir( self.name[:2] )
if ( not os.path.exists( path ) ) :
os.mkdir( path )
file = open( path + "/object", 'w' )
file.write( zlib.compress( store ) )
file.close()
return self.name
##
# Class constructor.
def __init__( self, author = None, parent = None, content = None ) :
self.author = str(author)
self.parent = str(parent)
self.created = str( datetime.datetime.now() )
self.content = str(content)
self.name = hashlib.sha1( self.author + self.parent + self.created ).hexdigest()
##
# Create an object from a file object
# @param name The name of the object to load
@staticmethod
def load( name ) :
result = Object()
path = name[:2] + '/' + name[2:] + '/object'
if ( os.path.exists( path ) ) :
file = open( name[:2] + '/' + name[2:] + '/object','r')
contentStream = StringIO.StringIO( zlib.decompress( file.read() ) )
for line in contentStream :
if ( line == "#\n") :
result.content = contentStream.read()
break
key, sep, value = line.rstrip('\n').partition(' ')
setattr(result, key, value)
return result
def appendTo(self) :
pass
def appendChild(self, child) :
if not hasattr(self, "name") :
pass
if child.parent != self.name :
pass
if ( not os.path.exists( self.name[:2] ) ) :
os.mkdir( self.name[:2] )
if ( not os.path.exists( path ) ) :
os.mkdir( path )
file = open( path + "/childs", 'w+' )
file.write( child.name )
file.close()
if __name__== '__main__' :
x = Object("test parent", "test author")
name = x.save()
y = Object.load(name)
print y.author
print y.parent
print y.content
print y.created
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