imip-agent

Annotated imip_manager.py

259:986f9e998961
2015-02-05 Paul Boddie Only show an attendance selector for the user. Added tentative value details.
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#!/usr/bin/env python
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"""
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A Web interface to a user's calendar.
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Copyright (C) 2014, 2015 Paul Boddie <paul@boddie.org.uk>
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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this program.  If not, see <http://www.gnu.org/licenses/>.
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"""
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# Edit this path to refer to the location of the imiptools libraries, if
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# necessary.
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LIBRARY_PATH = "/var/lib/imip-agent"
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from datetime import date, datetime, timedelta
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import babel.dates
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import cgi, os, sys
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sys.path.append(LIBRARY_PATH)
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from imiptools.content import Handler
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from imiptools.data import get_address, get_uri, make_freebusy, parse_object, \
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                           Object, to_part
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from imiptools.dates import format_datetime, get_datetime, get_datetime_item, \
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                            get_end_of_day, get_start_of_day, get_start_of_next_day, \
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                            get_timestamp, ends_on_same_day, next_date, to_timezone
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from imiptools.mail import Messenger
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from imiptools.period import add_day_start_points, add_slots, convert_periods, \
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                             get_freebusy_details, \
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                             get_scale, have_conflict, get_slots, get_spans, \
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                             partition_by_day
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from imiptools.profile import Preferences
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import imip_store
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import markup
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getenv = os.environ.get
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setenv = os.environ.__setitem__
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class CGIEnvironment:
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    "A CGI-compatible environment."
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    def __init__(self, charset=None):
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        self.charset = charset
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        self.args = None
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        self.method = None
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        self.path = None
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        self.path_info = None
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        self.user = None
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    def get_args(self):
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        if self.args is None:
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            if self.get_method() != "POST":
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                setenv("QUERY_STRING", "")
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            args = cgi.parse(keep_blank_values=True)
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            if not self.charset:
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                self.args = args
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            else:
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                self.args = {}
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                for key, values in args.items():
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                    self.args[key] = [unicode(value, self.charset) for value in values]
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        return self.args
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    def get_method(self):
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        if self.method is None:
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            self.method = getenv("REQUEST_METHOD") or "GET"
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        return self.method
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    def get_path(self):
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        if self.path is None:
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            self.path = getenv("SCRIPT_NAME") or ""
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        return self.path
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    def get_path_info(self):
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        if self.path_info is None:
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            self.path_info = getenv("PATH_INFO") or ""
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        return self.path_info
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    def get_user(self):
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        if self.user is None:
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            self.user = getenv("REMOTE_USER") or ""
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        return self.user
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    def get_output(self):
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        return sys.stdout
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    def get_url(self):
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        path = self.get_path()
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        path_info = self.get_path_info()
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        return "%s%s" % (path.rstrip("/"), path_info)
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    def new_url(self, path_info):
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        path = self.get_path()
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        return "%s/%s" % (path.rstrip("/"), path_info.lstrip("/"))
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class ManagerHandler(Handler):
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    """
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    A content handler for use by the manager, as opposed to operating within the
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    mail processing pipeline.
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    """
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    def __init__(self, obj, user, messenger):
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        Handler.__init__(self, messenger=messenger)
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        self.set_object(obj)
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        self.user = user
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        self.organiser = self.obj.get_value("ORGANIZER")
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        self.attendees = self.obj.get_values("ATTENDEE")
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    # Communication methods.
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    def send_message(self, method, sender, for_organiser):
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        """
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        Create a full calendar object employing the given 'method', and send it
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        to the appropriate recipients, also sending a copy to the 'sender'. The
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        'for_organiser' value indicates whether the organiser is sending this
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        message.
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        """
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        parts = [self.obj.to_part(method)]
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        if for_organiser:
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            recipients = map(get_address, self.attendees)
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        else:
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            recipients = [get_address(self.organiser)]
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        # Bundle free/busy information if appropriate.
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        preferences = Preferences(self.user)
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        if preferences.get("freebusy_sharing") == "share" and \
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           preferences.get("freebusy_bundling") == "always":
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            # Invent a unique identifier.
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            utcnow = get_timestamp()
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            uid = "imip-agent-%s-%s" % (utcnow, get_address(self.user))
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            freebusy = self.store.get_freebusy(self.user)
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            parts.append(to_part("PUBLISH", [make_freebusy(freebusy, uid, self.user)]))
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        message = self.messenger.make_outgoing_message(parts, recipients, outgoing_bcc=sender)
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        self.messenger.sendmail(recipients, message.as_string(), outgoing_bcc=sender)
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    # Action methods.
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    def process_received_request(self, accept, update=False):
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        """
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        Process the current request for the given 'user', accepting any request
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        when 'accept' is true, declining requests otherwise. Return whether any
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        action was taken.
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        If 'update' is given, the sequence number will be incremented in order
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        to override any previous response.
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        """
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        # When accepting or declining, do so only on behalf of this user,
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        # preserving any other attributes set as an attendee.
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        for attendee, attendee_attr in self.obj.get_items("ATTENDEE"):
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            if attendee == self.user:
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                attendee_attr["PARTSTAT"] = accept and "ACCEPTED" or "DECLINED"
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                if self.messenger and self.messenger.sender != get_address(attendee):
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                    attendee_attr["SENT-BY"] = get_uri(self.messenger.sender)
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                self.obj["ATTENDEE"] = [(attendee, attendee_attr)]
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                if update:
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                    sequence = self.obj.get_value("SEQUENCE") or "0"
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                    self.obj["SEQUENCE"] = [(str(int(sequence) + 1), {})]
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                self.update_dtstamp()
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                self.send_message("REPLY", get_address(attendee), for_organiser=False)
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                return True
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        return False
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    def process_created_request(self, method, update=False):
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        """
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        Process the current request for the given 'user', sending a created
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        request of the given 'method' to attendees. Return whether any action
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        was taken.
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        If 'update' is given, the sequence number will be incremented in order
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        to override any previous message.
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        """
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        organiser, organiser_attr = self.obj.get_item("ORGANIZER")
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        if self.messenger and self.messenger.sender != get_address(organiser):
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            organiser_attr["SENT-BY"] = get_uri(self.messenger.sender)
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        if update:
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            sequence = self.obj.get_value("SEQUENCE") or "0"
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            self.obj["SEQUENCE"] = [(str(int(sequence) + 1), {})]
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        self.update_dtstamp()
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        self.send_message(method, get_address(self.organiser), for_organiser=True)
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        return True
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class Manager:
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    "A simple manager application."
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    def __init__(self, messenger=None):
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        self.messenger = messenger or Messenger()
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        self.encoding = "utf-8"
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        self.env = CGIEnvironment(self.encoding)
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        user = self.env.get_user()
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        self.user = user and get_uri(user) or None
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        self.preferences = None
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        self.locale = None
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        self.requests = None
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        self.out = self.env.get_output()
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        self.page = markup.page()
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        self.store = imip_store.FileStore()
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        self.objects = {}
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        try:
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            self.publisher = imip_store.FilePublisher()
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        except OSError:
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            self.publisher = None
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    def _get_uid(self, path_info):
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        return path_info.lstrip("/").split("/", 1)[0]
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    def _get_object(self, uid):
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        if self.objects.has_key(uid):
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            return self.objects[uid]
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        f = uid and self.store.get_event(self.user, uid) or None
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        if not f:
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            return None
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        fragment = parse_object(f, "utf-8")
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        obj = self.objects[uid] = fragment and Object(fragment)
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        return obj
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    def _get_requests(self):
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        if self.requests is None:
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            self.requests = self.store.get_requests(self.user)
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        return self.requests
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    def _get_request_summary(self):
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        summary = []
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        for uid in self._get_requests():
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            obj = self._get_object(uid)
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            if obj:
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                summary.append((
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                    obj.get_value("DTSTART"),
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                    obj.get_value("DTEND"),
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                    uid
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                    ))
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        return summary
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    # Preference methods.
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    def get_user_locale(self):
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        if not self.locale:
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            self.locale = self.get_preferences().get("LANG", "C")
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        return self.locale
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    def get_preferences(self):
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        if not self.preferences:
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            self.preferences = Preferences(self.user)
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        return self.preferences
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    def get_tzid(self):
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        prefs = self.get_preferences()
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        return prefs.get("TZID", "UTC")
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    # Prettyprinting of dates and times.
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    def format_date(self, dt, format):
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        return self._format_datetime(babel.dates.format_date, dt, format)
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    def format_time(self, dt, format):
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        return self._format_datetime(babel.dates.format_time, dt, format)
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    def format_datetime(self, dt, format):
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        return self._format_datetime(
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            isinstance(dt, datetime) and babel.dates.format_datetime or babel.dates.format_date,
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            dt, format)
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    def format_end_datetime(self, dt, format):
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        if isinstance(dt, date) and not isinstance(dt, datetime):
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            dt = dt - timedelta(1)
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        return self.format_datetime(dt, format)
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    def _format_datetime(self, fn, dt, format):
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        return fn(dt, format=format, locale=self.get_user_locale())
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    # Data management methods.
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    def remove_request(self, uid):
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        return self.store.dequeue_request(self.user, uid)
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    def remove_event(self, uid):
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        return self.store.remove_event(self.user, uid)
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    # Presentation methods.
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    def new_page(self, title):
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        self.page.init(title=title, charset=self.encoding, css=self.env.new_url("styles.css"))
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    def status(self, code, message):
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        self.header("Status", "%s %s" % (code, message))
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    def header(self, header, value):
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        print >>self.out, "%s: %s" % (header, value)
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    def no_user(self):
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        self.status(403, "Forbidden")
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        self.new_page(title="Forbidden")
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        self.page.p("You are not logged in and thus cannot access scheduling requests.")
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    def no_page(self):
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        self.status(404, "Not Found")
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        self.new_page(title="Not Found")
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        self.page.p("No page is provided at the given address.")
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    def redirect(self, url):
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        self.status(302, "Redirect")
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        self.header("Location", url)
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        self.new_page(title="Redirect")
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        self.page.p("Redirecting to: %s" % url)
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    # Request logic methods.
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    def handle_newevent(self):
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        """
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        Handle any new event operation, creating a new event and redirecting to
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        the event page for further activity.
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        """
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        # Handle a submitted form.
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        args = self.env.get_args()
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        if not args.has_key("newevent"):
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            return
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        # Create a new event using the available information.
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        slots = args.get("slot", [])
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        participants = args.get("participants", [])
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        if not slots:
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            return
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        # Coalesce the selected slots.
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        slots.sort()
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        coalesced = []
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        last = None
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        for slot in slots:
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            start, end = slot.split("-")
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            end = end or next_date(start)
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            if last:
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                last_start, last_end = last
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                # Merge adjacent dates and datetimes.
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                if start == last_end:
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                    last = last_start, end
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                    continue
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                # Handle datetimes within dates.
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                # Datetime periods are within single days and are therefore
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                # discarded.
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                elif start.startswith(last_start):
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                    continue
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                # Add separate dates and datetimes.
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                else:
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                    coalesced.append(last)
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            last = start, end
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        if last:
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            coalesced.append(last)
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        # Obtain the user's timezone.
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        tzid = self.get_tzid()
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        # Invent a unique identifier.
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        utcnow = get_timestamp()
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        uid = "imip-agent-%s-%s" % (utcnow, get_address(self.user))
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        # Define a single occurrence if only one coalesced slot exists.
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        # Otherwise, many occurrences are defined.
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        for i, (start, end) in enumerate(coalesced):
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            this_uid = "%s-%s" % (uid, i)
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            start = get_datetime(start, {"TZID" : tzid})
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            end = end and get_datetime(end, {"TZID" : tzid}) or get_start_of_next_day(start, tzid)
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            start_value, start_attr = get_datetime_item(start, tzid)
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            end_value, end_attr = get_datetime_item(end, tzid)
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            # Create a calendar object and store it as a request.
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            record = []
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            rwrite = record.append
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            rwrite(("UID", {}, this_uid))
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            rwrite(("SUMMARY", {}, "New event at %s" % utcnow))
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            rwrite(("DTSTAMP", {}, utcnow))
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            rwrite(("DTSTART", start_attr, start_value))
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            rwrite(("DTEND", end_attr, end_value))
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            rwrite(("ORGANIZER", {}, self.user))
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            for participant in participants:
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                if not participant:
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                    continue
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                participant = get_uri(participant)
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                rwrite(("ATTENDEE", {"RSVP" : "TRUE", "PARTSTAT" : "NEEDS-ACTION"}, participant))
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            obj = ("VEVENT", {}, record)
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            self.store.set_event(self.user, this_uid, obj)
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            self.store.queue_request(self.user, this_uid)
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        # Redirect to the object (or the first of the objects), where instead of
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        # attendee controls, there will be organiser controls.
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        self.redirect(self.env.new_url("%s-0" % uid))
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    def handle_request(self, uid, obj, queued):
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        """
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        Handle actions involving the given 'uid' and 'obj' object, where
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        'queued' indicates that the object has not yet been handled.
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        """
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        # Handle a submitted form.
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        args = self.env.get_args()
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        handled = True
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        # Update the object.
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        if args.has_key("summary"):
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            obj["SUMMARY"] = [(args["summary"][0], {})]
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        if args.has_key("partstat"):
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            attendees = obj.get_value_map("ATTENDEE")
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            if attendees.has_key(self.user):
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                attendees[self.user]["PARTSTAT"] = args["partstat"][0]
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        # Process any action.
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        accept = args.has_key("accept")
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        decline = args.has_key("decline")
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        discard = args.has_key("discard")
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        invite = args.has_key("invite")
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        cancel = args.has_key("cancel")
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        save = args.has_key("save")
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        update = not queued and args.has_key("update")
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        if accept or decline or invite or cancel:
paul@121 493
paul@212 494
            handler = ManagerHandler(obj, self.user, self.messenger)
paul@121 495
paul@212 496
            # Process the object and remove it from the list of requests.
paul@121 497
paul@207 498
            if (accept or decline) and handler.process_received_request(accept, update) or \
paul@255 499
               (invite or cancel) and handler.process_created_request(invite and "REQUEST" or "CANCEL", update):
paul@121 500
paul@121 501
                self.remove_request(uid)
paul@121 502
paul@257 503
        # Save single user events.
paul@121 504
paul@257 505
        elif save:
paul@257 506
            self.store.set_event(self.user, uid, obj.to_node())
paul@257 507
            freebusy = self.store.get_freebusy(self.user)
paul@257 508
            self.remove_request(uid)
paul@121 509
paul@257 510
        # Remove the request and the object.
paul@257 511
paul@257 512
        elif discard:
paul@234 513
            self.remove_event(uid)
paul@121 514
            self.remove_request(uid)
paul@121 515
paul@121 516
        else:
paul@123 517
            handled = False
paul@121 518
paul@212 519
        # Upon handling an action, redirect to the main page.
paul@212 520
paul@123 521
        if handled:
paul@123 522
            self.redirect(self.env.get_path())
paul@123 523
paul@123 524
        return handled
paul@121 525
paul@246 526
    # Page fragment methods.
paul@246 527
paul@254 528
    def show_request_controls(self, obj, needs_update):
paul@155 529
paul@155 530
        """
paul@212 531
        Show form controls for a request concerning 'obj', indicating whether
paul@254 532
        an update will be performed if 'needs_update' is specified as a true
paul@254 533
        value.
paul@155 534
        """
paul@155 535
paul@212 536
        page = self.page
paul@212 537
paul@213 538
        is_organiser = obj.get_value("ORGANIZER") == self.user
paul@207 539
paul@253 540
        attendees = obj.get_value_map("ATTENDEE")
paul@253 541
        is_attendee = attendees.has_key(self.user)
paul@253 542
        attendee_attr = attendees.get(self.user)
paul@121 543
paul@257 544
        have_other_attendees = len(attendees) > (is_attendee and 1 or 0)
paul@257 545
paul@257 546
        # Show appropriate options depending on the role of the user.
paul@257 547
paul@257 548
        if is_attendee and not is_organiser:
paul@253 549
            partstat = attendee_attr.get("PARTSTAT")
paul@253 550
            if partstat == "ACCEPTED":
paul@253 551
                page.p("This request has been accepted.")
paul@253 552
            elif partstat == "DECLINED":
paul@253 553
                page.p("This request has been declined.")
paul@253 554
            else:
paul@253 555
                page.p("This request has not yet been dealt with.")
paul@121 556
paul@255 557
            if needs_update:
paul@255 558
                page.p("This request can be updated as follows:")
paul@255 559
            else:
paul@255 560
                page.p("An action is required for this request:")
paul@253 561
paul@255 562
            page.p()
paul@212 563
            page.input(name="accept", type="submit", value="Accept")
paul@212 564
            page.add(" ")
paul@212 565
            page.input(name="decline", type="submit", value="Decline")
paul@255 566
            page.add(" ")
paul@255 567
            page.input(name="discard", type="submit", value="Discard")
paul@255 568
            page.p.close()
paul@207 569
paul@255 570
        if is_organiser:
paul@257 571
            if have_other_attendees:
paul@257 572
                if needs_update:
paul@257 573
                    page.p("As organiser, you can perform the following:")
paul@257 574
                else:
paul@257 575
                    page.p("As organiser, you will need to perform an action:")
paul@255 576
paul@257 577
                page.p()
paul@257 578
                page.input(name="invite", type="submit", value="Invite")
paul@257 579
                page.add(" ")
paul@257 580
                page.input(name="cancel", type="submit", value="Cancel")
paul@257 581
                page.p.close()
paul@257 582
            else:
paul@257 583
                page.p()
paul@257 584
                page.input(name="save", type="submit", value="Save")
paul@257 585
                page.p.close()
paul@207 586
paul@207 587
        # Updated objects need to have details updated upon sending.
paul@207 588
paul@254 589
        if needs_update:
paul@212 590
            page.input(name="update", type="hidden", value="true")
paul@207 591
paul@210 592
    object_labels = {
paul@210 593
        "SUMMARY"   : "Summary",
paul@210 594
        "DTSTART"   : "Start",
paul@210 595
        "DTEND"     : "End",
paul@210 596
        "ORGANIZER" : "Organiser",
paul@210 597
        "ATTENDEE"  : "Attendee",
paul@210 598
        }
paul@210 599
paul@257 600
    partstat_items = [
paul@257 601
        ("NEEDS-ACTION", "Not confirmed"),
paul@257 602
        ("ACCEPTED", "Attending"),
paul@259 603
        ("TENTATIVE", "Tentatively attending"),
paul@257 604
        ("DECLINED", "Not attending"),
paul@257 605
        ]
paul@257 606
paul@254 607
    def show_object_on_page(self, uid, obj, needs_update):
paul@121 608
paul@121 609
        """
paul@121 610
        Show the calendar object with the given 'uid' and representation 'obj'
paul@121 611
        on the current page.
paul@121 612
        """
paul@121 613
paul@210 614
        page = self.page
paul@212 615
        page.form(method="POST")
paul@210 616
paul@154 617
        # Obtain the user's timezone.
paul@154 618
paul@244 619
        tzid = self.get_tzid()
paul@121 620
paul@121 621
        # Provide a summary of the object.
paul@121 622
paul@230 623
        page.table(class_="object", cellspacing=5, cellpadding=5)
paul@212 624
        page.thead()
paul@212 625
        page.tr()
paul@212 626
        page.th("Event", class_="mainheading", colspan=2)
paul@212 627
        page.tr.close()
paul@212 628
        page.thead.close()
paul@212 629
        page.tbody()
paul@121 630
paul@121 631
        for name in ["SUMMARY", "DTSTART", "DTEND", "ORGANIZER", "ATTENDEE"]:
paul@210 632
            page.tr()
paul@210 633
paul@210 634
            label = self.object_labels.get(name, name)
paul@210 635
paul@210 636
            # Handle datetimes specially.
paul@210 637
paul@147 638
            if name in ["DTSTART", "DTEND"]:
paul@213 639
                value, attr = obj.get_item(name)
paul@154 640
                tzid = attr.get("TZID", tzid)
paul@232 641
                value = (
paul@232 642
                    name == "DTSTART" and self.format_datetime or self.format_end_datetime
paul@232 643
                    )(to_timezone(get_datetime(value), tzid), "full")
paul@210 644
                page.th(label, class_="objectheading")
paul@210 645
                page.td(value)
paul@210 646
                page.tr.close()
paul@210 647
paul@212 648
            # Handle the summary specially.
paul@212 649
paul@212 650
            elif name == "SUMMARY":
paul@213 651
                value = obj.get_value(name)
paul@212 652
                page.th(label, class_="objectheading")
paul@212 653
                page.td()
paul@212 654
                page.input(name="summary", type="text", value=value, size=80)
paul@212 655
                page.td.close()
paul@212 656
                page.tr.close()
paul@212 657
paul@210 658
            # Handle potentially many values.
paul@210 659
paul@147 660
            else:
paul@213 661
                items = obj.get_items(name)
paul@233 662
                if not items:
paul@233 663
                    continue
paul@233 664
paul@210 665
                page.th(label, class_="objectheading", rowspan=len(items))
paul@210 666
paul@210 667
                first = True
paul@210 668
paul@210 669
                for value, attr in items:
paul@210 670
                    if not first:
paul@210 671
                        page.tr()
paul@210 672
                    else:
paul@210 673
                        first = False
paul@121 674
paul@210 675
                    page.td()
paul@210 676
                    page.add(value)
paul@210 677
paul@210 678
                    if name == "ATTENDEE":
paul@210 679
                        partstat = attr.get("PARTSTAT")
paul@259 680
                        if partstat and value == self.user:
paul@257 681
                            self._show_menu("partstat", partstat, self.partstat_items)
paul@210 682
paul@210 683
                    page.td.close()
paul@210 684
                    page.tr.close()
paul@210 685
paul@212 686
        page.tbody.close()
paul@210 687
        page.table.close()
paul@121 688
paul@213 689
        dtstart = format_datetime(obj.get_utc_datetime("DTSTART"))
paul@213 690
        dtend = format_datetime(obj.get_utc_datetime("DTEND"))
paul@121 691
paul@121 692
        # Indicate whether there are conflicting events.
paul@121 693
paul@121 694
        freebusy = self.store.get_freebusy(self.user)
paul@121 695
paul@121 696
        if freebusy:
paul@121 697
paul@121 698
            # Obtain any time zone details from the suggested event.
paul@121 699
paul@213 700
            _dtstart, attr = obj.get_item("DTSTART")
paul@154 701
            tzid = attr.get("TZID", tzid)
paul@121 702
paul@121 703
            # Show any conflicts.
paul@121 704
paul@121 705
            for t in have_conflict(freebusy, [(dtstart, dtend)], True):
paul@121 706
                start, end, found_uid = t[:3]
paul@154 707
paul@154 708
                # Provide details of any conflicting event.
paul@154 709
paul@121 710
                if uid != found_uid:
paul@149 711
                    start = self.format_datetime(to_timezone(get_datetime(start), tzid), "full")
paul@149 712
                    end = self.format_datetime(to_timezone(get_datetime(end), tzid), "full")
paul@210 713
                    page.p("Event conflicts with another from %s to %s: " % (start, end))
paul@154 714
paul@154 715
                    # Show the event summary for the conflicting event.
paul@154 716
paul@154 717
                    found_obj = self._get_object(found_uid)
paul@154 718
                    if found_obj:
paul@213 719
                        page.a(found_obj.get_value("SUMMARY"), href=self.env.new_url(found_uid))
paul@121 720
paul@254 721
        self.show_request_controls(obj, needs_update)
paul@212 722
        page.form.close()
paul@212 723
paul@121 724
    def show_requests_on_page(self):
paul@69 725
paul@69 726
        "Show requests for the current user."
paul@69 727
paul@69 728
        # NOTE: This list could be more informative, but it is envisaged that
paul@69 729
        # NOTE: the requests would be visited directly anyway.
paul@69 730
paul@121 731
        requests = self._get_requests()
paul@70 732
paul@185 733
        self.page.div(id="pending-requests")
paul@185 734
paul@80 735
        if requests:
paul@114 736
            self.page.p("Pending requests:")
paul@114 737
paul@80 738
            self.page.ul()
paul@69 739
paul@80 740
            for request in requests:
paul@165 741
                obj = self._get_object(request)
paul@165 742
                if obj:
paul@165 743
                    self.page.li()
paul@213 744
                    self.page.a(obj.get_value("SUMMARY"), href="#request-%s" % request)
paul@165 745
                    self.page.li.close()
paul@80 746
paul@80 747
            self.page.ul.close()
paul@80 748
paul@80 749
        else:
paul@80 750
            self.page.p("There are no pending requests.")
paul@69 751
paul@185 752
        self.page.div.close()
paul@185 753
paul@185 754
    def show_participants_on_page(self):
paul@185 755
paul@185 756
        "Show participants for scheduling purposes."
paul@185 757
paul@185 758
        args = self.env.get_args()
paul@185 759
        participants = args.get("participants", [])
paul@185 760
paul@185 761
        try:
paul@185 762
            for name, value in args.items():
paul@185 763
                if name.startswith("remove-participant-"):
paul@185 764
                    i = int(name[len("remove-participant-"):])
paul@185 765
                    del participants[i]
paul@185 766
                    break
paul@185 767
        except ValueError:
paul@185 768
            pass
paul@185 769
paul@185 770
        # Trim empty participants.
paul@185 771
paul@185 772
        while participants and not participants[-1].strip():
paul@185 773
            participants.pop()
paul@185 774
paul@185 775
        # Show any specified participants together with controls to remove and
paul@185 776
        # add participants.
paul@185 777
paul@185 778
        self.page.div(id="participants")
paul@185 779
paul@185 780
        self.page.p("Participants for scheduling:")
paul@185 781
paul@185 782
        for i, participant in enumerate(participants):
paul@185 783
            self.page.p()
paul@185 784
            self.page.input(name="participants", type="text", value=participant)
paul@185 785
            self.page.input(name="remove-participant-%d" % i, type="submit", value="Remove")
paul@185 786
            self.page.p.close()
paul@185 787
paul@185 788
        self.page.p()
paul@185 789
        self.page.input(name="participants", type="text")
paul@185 790
        self.page.input(name="add-participant", type="submit", value="Add")
paul@185 791
        self.page.p.close()
paul@185 792
paul@185 793
        self.page.div.close()
paul@185 794
paul@185 795
        return participants
paul@185 796
paul@121 797
    # Full page output methods.
paul@70 798
paul@121 799
    def show_object(self, path_info):
paul@70 800
paul@121 801
        "Show an object request using the given 'path_info' for the current user."
paul@70 802
paul@121 803
        uid = self._get_uid(path_info)
paul@121 804
        obj = self._get_object(uid)
paul@121 805
paul@121 806
        if not obj:
paul@70 807
            return False
paul@70 808
paul@123 809
        is_request = uid in self._get_requests()
paul@155 810
        handled = self.handle_request(uid, obj, is_request)
paul@77 811
paul@123 812
        if handled:
paul@123 813
            return True
paul@73 814
paul@123 815
        self.new_page(title="Event")
paul@254 816
        self.show_object_on_page(uid, obj, not is_request)
paul@73 817
paul@70 818
        return True
paul@70 819
paul@114 820
    def show_calendar(self):
paul@114 821
paul@114 822
        "Show the calendar for the current user."
paul@114 823
paul@202 824
        handled = self.handle_newevent()
paul@202 825
paul@114 826
        self.new_page(title="Calendar")
paul@162 827
        page = self.page
paul@162 828
paul@196 829
        # Form controls are used in various places on the calendar page.
paul@196 830
paul@196 831
        page.form(method="POST")
paul@196 832
paul@121 833
        self.show_requests_on_page()
paul@185 834
        participants = self.show_participants_on_page()
paul@114 835
paul@196 836
        # Show a button for scheduling a new event.
paul@196 837
paul@230 838
        page.p(class_="controls")
paul@196 839
        page.input(name="newevent", type="submit", value="New event", id="newevent")
paul@258 840
        page.input(name="reset", type="submit", value="Clear selections", id="reset")
paul@196 841
        page.p.close()
paul@196 842
paul@231 843
        # Show controls for hiding empty and busy slots.
paul@203 844
        # The positioning of the control, paragraph and table are important here.
paul@203 845
paul@203 846
        page.input(name="hideslots", type="checkbox", value="hide", id="hideslots")
paul@231 847
        page.input(name="hidebusy", type="checkbox", value="hide", id="hidebusy")
paul@203 848
paul@230 849
        page.p(class_="controls")
paul@237 850
        page.label("Hide busy time periods", for_="hidebusy", class_="hidebusy enable")
paul@237 851
        page.label("Show busy time periods", for_="hidebusy", class_="hidebusy disable")
paul@237 852
        page.label("Hide unused time periods", for_="hideslots", class_="hideslots enable")
paul@237 853
        page.label("Show unused time periods", for_="hideslots", class_="hideslots disable")
paul@203 854
        page.p.close()
paul@203 855
paul@114 856
        freebusy = self.store.get_freebusy(self.user)
paul@114 857
paul@114 858
        if not freebusy:
paul@114 859
            page.p("No events scheduled.")
paul@114 860
            return
paul@114 861
paul@154 862
        # Obtain the user's timezone.
paul@147 863
paul@244 864
        tzid = self.get_tzid()
paul@147 865
paul@114 866
        # Day view: start at the earliest known day and produce days until the
paul@114 867
        # latest known day, perhaps with expandable sections of empty days.
paul@114 868
paul@114 869
        # Month view: start at the earliest known month and produce months until
paul@114 870
        # the latest known month, perhaps with expandable sections of empty
paul@114 871
        # months.
paul@114 872
paul@114 873
        # Details of users to invite to new events could be superimposed on the
paul@114 874
        # calendar.
paul@114 875
paul@185 876
        # Requests are listed and linked to their tentative positions in the
paul@185 877
        # calendar. Other participants are also shown.
paul@185 878
paul@185 879
        request_summary = self._get_request_summary()
paul@185 880
paul@185 881
        period_groups = [request_summary, freebusy]
paul@185 882
        period_group_types = ["request", "freebusy"]
paul@185 883
        period_group_sources = ["Pending requests", "Your schedule"]
paul@185 884
paul@187 885
        for i, participant in enumerate(participants):
paul@185 886
            period_groups.append(self.store.get_freebusy_for_other(self.user, get_uri(participant)))
paul@187 887
            period_group_types.append("freebusy-part%d" % i)
paul@185 888
            period_group_sources.append(participant)
paul@114 889
paul@162 890
        groups = []
paul@162 891
        group_columns = []
paul@185 892
        group_types = period_group_types
paul@185 893
        group_sources = period_group_sources
paul@162 894
        all_points = set()
paul@162 895
paul@162 896
        # Obtain time point information for each group of periods.
paul@162 897
paul@185 898
        for periods in period_groups:
paul@162 899
            periods = convert_periods(periods, tzid)
paul@162 900
paul@162 901
            # Get the time scale with start and end points.
paul@162 902
paul@162 903
            scale = get_scale(periods)
paul@162 904
paul@162 905
            # Get the time slots for the periods.
paul@162 906
paul@162 907
            slots = get_slots(scale)
paul@162 908
paul@162 909
            # Add start of day time points for multi-day periods.
paul@162 910
paul@244 911
            add_day_start_points(slots, tzid)
paul@162 912
paul@162 913
            # Record the slots and all time points employed.
paul@162 914
paul@162 915
            groups.append(slots)
paul@201 916
            all_points.update([point for point, active in slots])
paul@162 917
paul@162 918
        # Partition the groups into days.
paul@162 919
paul@162 920
        days = {}
paul@162 921
        partitioned_groups = []
paul@171 922
        partitioned_group_types = []
paul@185 923
        partitioned_group_sources = []
paul@162 924
paul@185 925
        for slots, group_type, group_source in zip(groups, group_types, group_sources):
paul@162 926
paul@162 927
            # Propagate time points to all groups of time slots.
paul@162 928
paul@162 929
            add_slots(slots, all_points)
paul@162 930
paul@162 931
            # Count the number of columns employed by the group.
paul@162 932
paul@162 933
            columns = 0
paul@162 934
paul@162 935
            # Partition the time slots by day.
paul@162 936
paul@162 937
            partitioned = {}
paul@162 938
paul@162 939
            for day, day_slots in partition_by_day(slots).items():
paul@201 940
                intervals = []
paul@201 941
                last = None
paul@201 942
paul@201 943
                for point, active in day_slots:
paul@201 944
                    columns = max(columns, len(active))
paul@201 945
                    if last:
paul@201 946
                        intervals.append((last, point))
paul@201 947
                    last = point
paul@201 948
paul@201 949
                if last:
paul@201 950
                    intervals.append((last, None))
paul@162 951
paul@162 952
                if not days.has_key(day):
paul@162 953
                    days[day] = set()
paul@162 954
paul@162 955
                # Convert each partition to a mapping from points to active
paul@162 956
                # periods.
paul@162 957
paul@201 958
                partitioned[day] = dict(day_slots)
paul@201 959
paul@201 960
                # Record the divisions or intervals within each day.
paul@201 961
paul@201 962
                days[day].update(intervals)
paul@162 963
paul@194 964
            if group_type != "request" or columns:
paul@194 965
                group_columns.append(columns)
paul@194 966
                partitioned_groups.append(partitioned)
paul@194 967
                partitioned_group_types.append(group_type)
paul@194 968
                partitioned_group_sources.append(group_source)
paul@114 969
paul@243 970
        self.show_calendar_day_controls(days)
paul@243 971
paul@230 972
        page.table(cellspacing=5, cellpadding=5, class_="calendar")
paul@188 973
        self.show_calendar_participant_headings(partitioned_group_types, partitioned_group_sources, group_columns)
paul@171 974
        self.show_calendar_days(days, partitioned_groups, partitioned_group_types, group_columns)
paul@162 975
        page.table.close()
paul@114 976
paul@196 977
        # End the form region.
paul@196 978
paul@196 979
        page.form.close()
paul@196 980
paul@246 981
    # More page fragment methods.
paul@246 982
paul@243 983
    def show_calendar_day_controls(self, days):
paul@243 984
paul@243 985
        "Show controls for the given 'days' in the calendar."
paul@243 986
paul@243 987
        page = self.page
paul@243 988
        slots = self.env.get_args().get("slot", [])
paul@243 989
paul@243 990
        for day in days:
paul@243 991
            value, identifier = self._day_value_and_identifier(day)
paul@243 992
            self._slot_selector(value, identifier, slots)
paul@243 993
paul@243 994
        # Generate a dynamic stylesheet to allow day selections to colour
paul@243 995
        # specific days.
paul@243 996
        # NOTE: The style details need to be coordinated with the static
paul@243 997
        # NOTE: stylesheet.
paul@243 998
paul@243 999
        page.style(type="text/css")
paul@243 1000
paul@243 1001
        for day in days:
paul@243 1002
            daystr = format_datetime(day)
paul@243 1003
            page.add("""\
paul@249 1004
input.newevent.selector#day-%s-:checked ~ table label.day.day-%s,
paul@249 1005
input.newevent.selector#day-%s-:checked ~ table label.timepoint.day-%s {
paul@243 1006
    background-color: #5f4;
paul@243 1007
    text-decoration: underline;
paul@243 1008
}
paul@243 1009
""" % (daystr, daystr, daystr, daystr))
paul@243 1010
paul@243 1011
        page.style.close()
paul@243 1012
paul@188 1013
    def show_calendar_participant_headings(self, group_types, group_sources, group_columns):
paul@186 1014
paul@186 1015
        """
paul@186 1016
        Show headings for the participants and other scheduling contributors,
paul@188 1017
        defined by 'group_types', 'group_sources' and 'group_columns'.
paul@186 1018
        """
paul@186 1019
paul@185 1020
        page = self.page
paul@185 1021
paul@188 1022
        page.colgroup(span=1, id="columns-timeslot")
paul@186 1023
paul@188 1024
        for group_type, columns in zip(group_types, group_columns):
paul@191 1025
            page.colgroup(span=max(columns, 1), id="columns-%s" % group_type)
paul@186 1026
paul@185 1027
        page.thead()
paul@185 1028
        page.tr()
paul@185 1029
        page.th("", class_="emptyheading")
paul@185 1030
paul@193 1031
        for group_type, source, columns in zip(group_types, group_sources, group_columns):
paul@193 1032
            page.th(source,
paul@193 1033
                class_=(group_type == "request" and "requestheading" or "participantheading"),
paul@193 1034
                colspan=max(columns, 1))
paul@185 1035
paul@185 1036
        page.tr.close()
paul@185 1037
        page.thead.close()
paul@185 1038
paul@171 1039
    def show_calendar_days(self, days, partitioned_groups, partitioned_group_types, group_columns):
paul@186 1040
paul@186 1041
        """
paul@186 1042
        Show calendar days, defined by a collection of 'days', the contributing
paul@186 1043
        period information as 'partitioned_groups' (partitioned by day), the
paul@186 1044
        'partitioned_group_types' indicating the kind of contribution involved,
paul@186 1045
        and the 'group_columns' defining the number of columns in each group.
paul@186 1046
        """
paul@186 1047
paul@162 1048
        page = self.page
paul@162 1049
paul@191 1050
        # Determine the number of columns required. Where participants provide
paul@191 1051
        # no columns for events, one still needs to be provided for the
paul@191 1052
        # participant itself.
paul@147 1053
paul@191 1054
        all_columns = sum([max(columns, 1) for columns in group_columns])
paul@191 1055
paul@191 1056
        # Determine the days providing time slots.
paul@191 1057
paul@162 1058
        all_days = days.items()
paul@162 1059
        all_days.sort()
paul@162 1060
paul@162 1061
        # Produce a heading and time points for each day.
paul@162 1062
paul@201 1063
        for day, intervals in all_days:
paul@186 1064
            page.thead()
paul@114 1065
            page.tr()
paul@243 1066
            page.th(class_="dayheading container", colspan=all_columns+1)
paul@239 1067
            self._day_heading(day)
paul@114 1068
            page.th.close()
paul@153 1069
            page.tr.close()
paul@186 1070
            page.thead.close()
paul@114 1071
paul@162 1072
            groups_for_day = [partitioned.get(day) for partitioned in partitioned_groups]
paul@162 1073
paul@186 1074
            page.tbody()
paul@201 1075
            self.show_calendar_points(intervals, groups_for_day, partitioned_group_types, group_columns)
paul@186 1076
            page.tbody.close()
paul@185 1077
paul@201 1078
    def show_calendar_points(self, intervals, groups, group_types, group_columns):
paul@186 1079
paul@186 1080
        """
paul@201 1081
        Show the time 'intervals' along with period information from the given
paul@186 1082
        'groups', having the indicated 'group_types', each with the number of
paul@186 1083
        columns given by 'group_columns'.
paul@186 1084
        """
paul@186 1085
paul@162 1086
        page = self.page
paul@162 1087
paul@244 1088
        # Obtain the user's timezone.
paul@244 1089
paul@244 1090
        tzid = self.get_tzid()
paul@244 1091
paul@203 1092
        # Produce a row for each interval.
paul@162 1093
paul@201 1094
        intervals = list(intervals)
paul@201 1095
        intervals.sort()
paul@162 1096
paul@201 1097
        for point, endpoint in intervals:
paul@244 1098
            continuation = point == get_start_of_day(point, tzid)
paul@153 1099
paul@203 1100
            # Some rows contain no period details and are marked as such.
paul@203 1101
paul@203 1102
            have_active = reduce(lambda x, y: x or y, [slots.get(point) for slots in groups], None)
paul@203 1103
paul@203 1104
            css = " ".join(
paul@203 1105
                ["slot"] +
paul@231 1106
                (have_active and ["busy"] or ["empty"]) +
paul@203 1107
                (continuation and ["daystart"] or [])
paul@203 1108
                )
paul@203 1109
paul@203 1110
            page.tr(class_=css)
paul@162 1111
            page.th(class_="timeslot")
paul@201 1112
            self._time_point(point, endpoint)
paul@162 1113
            page.th.close()
paul@162 1114
paul@162 1115
            # Obtain slots for the time point from each group.
paul@162 1116
paul@171 1117
            for columns, slots, group_type in zip(group_columns, groups, group_types):
paul@162 1118
                active = slots and slots.get(point)
paul@162 1119
paul@191 1120
                # Where no periods exist for the given time interval, generate
paul@191 1121
                # an empty cell. Where a participant provides no periods at all,
paul@191 1122
                # the colspan is adjusted to be 1, not 0.
paul@191 1123
paul@162 1124
                if not active:
paul@196 1125
                    page.td(class_="empty container", colspan=max(columns, 1))
paul@201 1126
                    self._empty_slot(point, endpoint)
paul@196 1127
                    page.td.close()
paul@162 1128
                    continue
paul@162 1129
paul@162 1130
                slots = slots.items()
paul@162 1131
                slots.sort()
paul@162 1132
                spans = get_spans(slots)
paul@162 1133
paul@162 1134
                # Show a column for each active period.
paul@117 1135
paul@153 1136
                for t in active:
paul@185 1137
                    if t and len(t) >= 2:
paul@185 1138
                        start, end, uid, key = get_freebusy_details(t)
paul@185 1139
                        span = spans[key]
paul@171 1140
paul@171 1141
                        # Produce a table cell only at the start of the period
paul@171 1142
                        # or when continued at the start of a day.
paul@171 1143
paul@153 1144
                        if point == start or continuation:
paul@153 1145
paul@195 1146
                            has_continued = continuation and point != start
paul@244 1147
                            will_continue = not ends_on_same_day(point, end, tzid)
paul@195 1148
                            css = " ".join(
paul@195 1149
                                ["event"] +
paul@195 1150
                                (has_continued and ["continued"] or []) +
paul@195 1151
                                (will_continue and ["continues"] or [])
paul@195 1152
                                )
paul@195 1153
paul@189 1154
                            # Only anchor the first cell of events.
paul@189 1155
paul@189 1156
                            if point == start:
paul@195 1157
                                page.td(class_=css, rowspan=span, id="%s-%s" % (group_type, uid))
paul@189 1158
                            else:
paul@195 1159
                                page.td(class_=css, rowspan=span)
paul@171 1160
paul@153 1161
                            obj = self._get_object(uid)
paul@185 1162
paul@185 1163
                            if not obj:
paul@185 1164
                                page.span("")
paul@185 1165
                            else:
paul@213 1166
                                summary = obj.get_value("SUMMARY")
paul@171 1167
paul@171 1168
                                # Only link to events if they are not being
paul@171 1169
                                # updated by requests.
paul@171 1170
paul@171 1171
                                if uid in self._get_requests() and group_type != "request":
paul@189 1172
                                    page.span(summary)
paul@164 1173
                                else:
paul@171 1174
                                    href = "%s/%s" % (self.env.get_url().rstrip("/"), uid)
paul@189 1175
                                    page.a(summary, href=href)
paul@171 1176
paul@153 1177
                            page.td.close()
paul@153 1178
                    else:
paul@196 1179
                        page.td(class_="empty container")
paul@201 1180
                        self._empty_slot(point, endpoint)
paul@196 1181
                        page.td.close()
paul@114 1182
paul@166 1183
                # Pad with empty columns.
paul@166 1184
paul@166 1185
                i = columns - len(active)
paul@166 1186
                while i > 0:
paul@166 1187
                    i -= 1
paul@196 1188
                    page.td(class_="empty container")
paul@201 1189
                    self._empty_slot(point, endpoint)
paul@196 1190
                    page.td.close()
paul@166 1191
paul@162 1192
            page.tr.close()
paul@114 1193
paul@239 1194
    def _day_heading(self, day):
paul@243 1195
paul@243 1196
        """
paul@243 1197
        Generate a heading for 'day' of the following form:
paul@243 1198
paul@243 1199
        <label class="day day-20150203" for="day-20150203">Tuesday, 3 February 2015</label>
paul@243 1200
        """
paul@243 1201
paul@239 1202
        page = self.page
paul@243 1203
        daystr = format_datetime(day)
paul@239 1204
        value, identifier = self._day_value_and_identifier(day)
paul@243 1205
        page.label(self.format_date(day, "full"), class_="day day-%s" % daystr, for_=identifier)
paul@239 1206
paul@201 1207
    def _time_point(self, point, endpoint):
paul@243 1208
paul@243 1209
        """
paul@243 1210
        Generate headings for the 'point' to 'endpoint' period of the following
paul@243 1211
        form:
paul@243 1212
paul@243 1213
        <label class="timepoint day-20150203" for="slot-20150203T090000-20150203T100000">09:00:00 CET</label>
paul@243 1214
        <span class="endpoint">10:00:00 CET</span>
paul@243 1215
        """
paul@243 1216
paul@201 1217
        page = self.page
paul@244 1218
        tzid = self.get_tzid()
paul@243 1219
        daystr = format_datetime(point.date())
paul@201 1220
        value, identifier = self._slot_value_and_identifier(point, endpoint)
paul@238 1221
        slots = self.env.get_args().get("slot", [])
paul@239 1222
        self._slot_selector(value, identifier, slots)
paul@243 1223
        page.label(self.format_time(point, "long"), class_="timepoint day-%s" % daystr, for_=identifier)
paul@244 1224
        page.span(self.format_time(endpoint or get_end_of_day(point, tzid), "long"), class_="endpoint")
paul@239 1225
paul@239 1226
    def _slot_selector(self, value, identifier, slots):
paul@258 1227
        reset = self.env.get_args().has_key("reset")
paul@239 1228
        page = self.page
paul@258 1229
        if not reset and value in slots:
paul@249 1230
            page.input(name="slot", type="checkbox", value=value, id=identifier, class_="newevent selector", checked="checked")
paul@202 1231
        else:
paul@249 1232
            page.input(name="slot", type="checkbox", value=value, id=identifier, class_="newevent selector")
paul@201 1233
paul@201 1234
    def _empty_slot(self, point, endpoint):
paul@197 1235
        page = self.page
paul@201 1236
        value, identifier = self._slot_value_and_identifier(point, endpoint)
paul@236 1237
        page.label("Select/deselect period", class_="newevent popup", for_=identifier)
paul@196 1238
paul@239 1239
    def _day_value_and_identifier(self, day):
paul@239 1240
        value = "%s-" % format_datetime(day)
paul@239 1241
        identifier = "day-%s" % value
paul@239 1242
        return value, identifier
paul@239 1243
paul@201 1244
    def _slot_value_and_identifier(self, point, endpoint):
paul@202 1245
        value = "%s-%s" % (format_datetime(point), endpoint and format_datetime(endpoint) or "")
paul@201 1246
        identifier = "slot-%s" % value
paul@201 1247
        return value, identifier
paul@196 1248
paul@257 1249
    def _show_menu(self, name, value, items):
paul@257 1250
        page = self.page
paul@257 1251
        values = self.env.get_args().get(name, [value])
paul@257 1252
        page.select(name=name)
paul@257 1253
        for v, label in items:
paul@257 1254
            if v in values:
paul@257 1255
                page.option(label, value=v, selected="selected")
paul@257 1256
            else:
paul@257 1257
                page.option(label, value=v)
paul@257 1258
        page.select.close()
paul@257 1259
paul@246 1260
    # Incoming HTTP request direction.
paul@246 1261
paul@69 1262
    def select_action(self):
paul@69 1263
paul@69 1264
        "Select the desired action and show the result."
paul@69 1265
paul@121 1266
        path_info = self.env.get_path_info().strip("/")
paul@121 1267
paul@69 1268
        if not path_info:
paul@114 1269
            self.show_calendar()
paul@121 1270
        elif self.show_object(path_info):
paul@70 1271
            pass
paul@70 1272
        else:
paul@70 1273
            self.no_page()
paul@69 1274
paul@82 1275
    def __call__(self):
paul@69 1276
paul@69 1277
        "Interpret a request and show an appropriate response."
paul@69 1278
paul@69 1279
        if not self.user:
paul@69 1280
            self.no_user()
paul@69 1281
        else:
paul@69 1282
            self.select_action()
paul@69 1283
paul@70 1284
        # Write the headers and actual content.
paul@70 1285
paul@69 1286
        print >>self.out, "Content-Type: text/html; charset=%s" % self.encoding
paul@69 1287
        print >>self.out
paul@69 1288
        self.out.write(unicode(self.page).encode(self.encoding))
paul@69 1289
paul@69 1290
if __name__ == "__main__":
paul@128 1291
    Manager()()
paul@69 1292
paul@69 1293
# vim: tabstop=4 expandtab shiftwidth=4