1.1 --- a/imiptools/handlers/scheduling/access.py	Sat Jan 30 17:24:39 2016 +0100
     1.2 +++ b/imiptools/handlers/scheduling/access.py	Sun Jan 31 00:45:26 2016 +0100
     1.3 @@ -19,9 +19,97 @@
     1.4  this program.  If not, see <http://www.gnu.org/licenses/>.
     1.5  """
     1.6  
     1.7 -from imiptools.data import get_address
     1.8 +from imiptools.data import get_address, get_addresses
     1.9 +from imiptools.text import parse_line
    1.10 +
    1.11 +def access_control_list(handler, args):
    1.12 +
    1.13 +    """
    1.14 +    Attempt to schedule the current object of the given 'handler' using an
    1.15 +    access control list provided in the given 'args', applying it to the
    1.16 +    organiser.
    1.17 +    """
    1.18 +
    1.19 +    # Obtain either a file from the user's preferences directory...
    1.20 +
    1.21 +    if not args:
    1.22 +        acl = handler.get_preferences().get("acl")
    1.23 +        lines = acl.strip().split("\n")
    1.24 +
    1.25 +    # Or obtain the contents of a specific file.
    1.26 +
    1.27 +    else:
    1.28 +        try:
    1.29 +            f = open(args[0])
    1.30 +        except IOError:
    1.31 +            return None
    1.32 +        try:
    1.33 +            lines = f.readlines()
    1.34 +        finally:
    1.35 +            f.close()
    1.36 +
    1.37 +    # Use the current object's identities with the ACL rules.
    1.38 +
    1.39 +    organiser = get_address(handler.obj.get_value("ORGANIZER"))
    1.40 +    attendees = get_addresses(handler.obj.get_values("ATTENDEE"))
    1.41 +
    1.42 +    response = None
    1.43 +
    1.44 +    for line in lines:
    1.45 +        parts = parse_line(line.strip())
    1.46 +
    1.47 +        # Skip empty lines.
    1.48 +
    1.49 +        if not parts:
    1.50 +            continue
    1.51  
    1.52 -def same_domain_only(handler):
    1.53 +        # Accept either a single word with an action or a rule.
    1.54 +        # NOTE: Should signal an error with the format.
    1.55 +
    1.56 +        if len(parts) == 1:
    1.57 +            action = parts[0]
    1.58 +        elif len(parts) >= 3:
    1.59 +            action, role, identities = parts[0], parts[1], map(get_address, parts[2:])
    1.60 +        else:
    1.61 +            return None
    1.62 +
    1.63 +        if action.lower() == "accept":
    1.64 +            result = "ACCEPTED"
    1.65 +        elif action.lower() in ["decline", "reject"]:
    1.66 +            result = "DECLINED"
    1.67 +        else:
    1.68 +            return None
    1.69 +
    1.70 +        # With only an action, prepare a default response in case none of
    1.71 +        # the rules match.
    1.72 +
    1.73 +        if len(parts) == 1:
    1.74 +            response = result
    1.75 +            continue
    1.76 +
    1.77 +        # Where no default has been set, use an implicit default based on
    1.78 +        # the action appearing in a rule.
    1.79 +
    1.80 +        elif not response:
    1.81 +            response = result == "ACCEPTED" and "DECLINED" or "ACCEPTED"
    1.82 +
    1.83 +        # Interpret a rule, attempting to match identities to properties.
    1.84 +
    1.85 +        if role.lower() in ["organiser", "organizer"]:
    1.86 +            match = organiser in identities
    1.87 +        elif role.lower() in ["attendee", "attendees"]:
    1.88 +            match = set(attendees).intersection(identities)
    1.89 +        else:
    1.90 +            return None
    1.91 +
    1.92 +        # Use the result of any match.
    1.93 +
    1.94 +        if match:
    1.95 +            response = result
    1.96 +
    1.97 +    return response
    1.98 +
    1.99 +def same_domain_only(handler, args):
   1.100  
   1.101      """
   1.102      Attempt to schedule the current object of the given 'handler' if the
   1.103 @@ -39,6 +127,7 @@
   1.104  # Registry of scheduling functions.
   1.105  
   1.106  scheduling_functions = {
   1.107 +    "access_control_list" : access_control_list,
   1.108      "same_domain_only" : same_domain_only,
   1.109      }
   1.110