source: TI01-discovery/trunk/OAIInfoEditor/oai_info_editor/config/oiemiddleware.py @ 5253

'''
 Middleware controller extension for the OAI info editor
  
 @author: C Byrom, Tessella Apr 2009
'''
import logging, urllib, os
from paste.deploy import CONFIG
from ndg.common.src.models.myconfig import myConfig
from oai_info_editor.model.user import *
from oai_info_editor.dal.providerinfodao import *
from oai_info_editor.lib.harvester import Harvester 
    
class OIEMiddleware(object):
    
    MISSING_HELP_TEXT_ERROR = 'Error: Help text missing from config file'

    # flags to lookup in config files - and to refer to data stored in global constants
    MANDATORY_DATA = 'mandatory'
    FIXED_DATA = 'fixed'
    HELP_DATA = 'help_text'
    
    def __init__(self, app, g, app_conf):
        logging.debug("Setting up editor configuration")
        #this is the next application in the wsgi stack
        self.app=app
        
        #set up the app configuration file
        cf=app_conf['configfile']
        cf=myConfig(cf)
      
        self.globals=g
        self.globals.ndgLink=cf.get('layout','ndgLink','http://ndg.nerc.ac.uk')
        self.globals.ndgImage=cf.get('layout','ndgImage',None)
        self.globals.helpIcon=cf.get('layout','helpIcon')
        self.globals.LeftAlt=cf.get('layout','HdrLeftAlt')
        self.globals.LeftLogo=cf.get('layout','HdrLeftLogo')
        self.globals.pageLogo="bodcHdr"
        self.globals.disclaimer=cf.get('default','disclaimer')
        self.globals.xslt=cf.get('layout','xslt','')
        self.globals.xmlIcon=cf.get('layout','XMLicon')
        self.globals.loadingIcon=cf.get('layout','loadingIcon')
        
        self.globals.server=cf.get('SERVERS','server','')
        self.globals.proxy = cf.get('SERVERS','proxyServer')
        self.globals.mailServer = cf.get('SERVERS', 'mailserver')
        
        self.globals.dataDir = cf.get('DATA_STORE', 'appDataFileDir')
        self.globals.backupDir = cf.get('DATA_STORE', 'backupFileDir')
        harvestDir = cf.get('DATA_STORE', 'harvestDir')
        if not harvestDir:
            raise ValueError("No harvest directory config data has been specified - so cannot harvest files.")
        
        self.globals.harvester = Harvester(self.globals.mailServer, outDir = harvestDir)


        self.globals.users = {}
        users = cf.get('USER_LIST', 'userIDs')
        
        if not users:
            raise ValueError("No user config data has been specified - so no one can use the editor")
        
        logging.debug("Setting up users for editor")
        for userID in users.split():
            pw = cf.get(userID, 'pw')
            providerNames = cf.get(userID, 'providerNames').split(';')
            names = []
            for name in providerNames:
                names.append(name.strip())
            
            providerNames = names
        
            if self.globals.users.has_key(userID):
                raise ValueError("Two identical users ('%s') specified in config file - this is not allowed"
                                 %userID)
            
            self.globals.users[userID] = User(userID, providerNames)
        logging.debug("- editor user objects set up")

        # store a data access object to general use
        logging.info("Set up central data access object for reuse across editor")
        self.globals.dao = createDAOWithClient(client = FILE_CLIENT_TYPE, configFile = cf)
        logging.info("DAO set up")
            
        self.config=cf
        logging.info("- editor configuration complete")
        
    def __call__(self,environ,start_response):
        
        environ['appConfig']=self.config
        return self.app(environ,start_response)