configfile.py

'''
	Copyright 2014-2015 Teemu Piippo
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions
	are met:

	1. Redistributions of source code must retain the above copyright
	   notice, this list of conditions and the following disclaimer.
	2. Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution.
	3. The name of the author may not be used to endorse or promote products
	   derived from this software without specific prior written permission.

	THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
'''

from __future__ import print_function
import json, sys
IsInitialized = False
Config = None
ConfigFileName = ""

class ConfigNode:
	def __init__ (self, obj, name, parent):
		self.obj = obj
		self.name = name
		self.root = parent if parent == None or parent.root == None else parent.root
	
	def keyname (self, key):
		if self.name == None:
			return key
		return self.name + ':' + key
	
	def get_value (self, key, default=None):
		i = 0
		needSave = False
		
		if not key in self.obj:
			if default == None:
				raise ValueError ("""Mandatory key '%s' not found""" % self.keyname (key))
			self.obj[key] = default
			self.save()
		
		return self.obj[key]
	
	def set_value (self, key, value):
		self.obj[key] = value
		self.save()

	def append_value (self, key, value):
		if key not in self.obj:
			self.obj[key] = []

		self.obj[key].append (value)
		self.save()
	
	def get_node (self, key):
		return ConfigNode (obj=self.get_value (key, {}), name=self.keyname (key), parent=self)
	
	def get_nodelist (self, key, default=None):
		data = self.get_value (key, default)
		result = []
		
		for entry in data:
			node = ConfigNode (obj=entry, name=self.keyname (key), parent=self)
			result.append (node)
		
		return result

	def has_node (self, key):
		return key in self.obj
	
	def append_nodelist (self, key):
		data = self.get_value (key, [])
		obj = {}
		data.append (obj)
		return ConfigNode (obj=obj, name=self.keyname (key), parent=self)
	
	def save (self):
		if self.root != None:
			self.root.save()
			return
		
		with open (ConfigFileName, 'w') as fp:
			json.dump (self.obj, fp, sort_keys = True, indent = 1)
		
		print ("""Config saved.""")
	
	def find_developer_by_email (self, commit_email):
		for developer, emails in self.get_value ('developer_emails', default={}).items():
			if commit_email in emails:
				return developer
		
		return ''

def init():
	filename = 'cobalt.json'

	if len (sys.argv) >= 2:
		filename = sys.argv[1]

	global IsInitialized
	global ConfigFileName
	ConfigFileName = filename

	if not IsInitialized:
		print ("""Loading configuration...""")

		try:
			with open (filename, 'r') as fp:
				jsondata = json.loads (fp.read())
		except IOError as e:
			print ("""Couldn't open %s: %s""" % (filename, e))
			quit()

		global Config
		Config = ConfigNode (jsondata, name=None, parent=None)
		IsInitialized = True

init()