1 #!/usr/bin/env python 2 3 import cgi, os, sys 4 5 sys.path.append("/var/lib/imip-agent") 6 7 from imiptools import make_message, sendmail 8 from imiptools.content import format_datetime, get_address, get_datetime, \ 9 get_item, get_items, get_periods, get_uri, \ 10 get_utc_datetime, get_value, get_values, \ 11 parse_object, to_part, to_timezone, \ 12 update_freebusy 13 from imiptools.period import have_conflict 14 from vCalendar import to_node 15 import markup 16 import imip_store 17 18 getenv = os.environ.get 19 setenv = os.environ.__setitem__ 20 21 class CGIEnvironment: 22 23 "A CGI-compatible environment." 24 25 def __init__(self): 26 self.args = None 27 self.method = None 28 self.path = None 29 self.path_info = None 30 self.user = None 31 32 def get_args(self): 33 if self.args is None: 34 if self.get_method() != "POST": 35 setenv("QUERY_STRING", "") 36 self.args = cgi.parse(keep_blank_values=True) 37 return self.args 38 39 def get_method(self): 40 if self.method is None: 41 self.method = getenv("REQUEST_METHOD") or "GET" 42 return self.method 43 44 def get_path(self): 45 if self.path is None: 46 self.path = getenv("SCRIPT_NAME") or "" 47 return self.path 48 49 def get_path_info(self): 50 if self.path_info is None: 51 self.path_info = getenv("PATH_INFO") or "" 52 return self.path_info 53 54 def get_user(self): 55 if self.user is None: 56 self.user = getenv("REMOTE_USER") or "" 57 return self.user 58 59 def get_output(self): 60 return sys.stdout 61 62 def get_url(self): 63 path = self.get_path() 64 path_info = self.get_path_info() 65 return "%s%s" % (path.rstrip("/"), path_info) 66 67 class Manager: 68 69 "A simple manager application." 70 71 def __init__(self): 72 self.env = CGIEnvironment() 73 user = self.env.get_user() 74 self.user = user and get_uri(user) or None 75 self.out = self.env.get_output() 76 self.page = markup.page() 77 self.encoding = "utf-8" 78 79 self.store = imip_store.FileStore() 80 81 try: 82 self.publisher = imip_store.FilePublisher() 83 except OSError: 84 self.publisher = None 85 86 def new_page(self, title): 87 self.page.init(title=title, charset=self.encoding) 88 89 def status(self, code, message): 90 print >>self.out, "Status:", code, message 91 92 def no_user(self): 93 self.status(403, "Forbidden") 94 self.new_page(title="Forbidden") 95 self.page.p("You are not logged in and thus cannot access scheduling requests.") 96 97 def no_page(self): 98 self.status(404, "Not Found") 99 self.new_page(title="Not Found") 100 self.page.p("No page is provided at the given address.") 101 102 def show_requests(self): 103 104 "Show requests for the current user." 105 106 # NOTE: This list could be more informative, but it is envisaged that 107 # NOTE: the requests would be visited directly anyway. 108 109 self.new_page(title="Pending Requests") 110 self.page.ul() 111 112 requests = self.store.get_requests(self.user) 113 114 for request in requests: 115 self.page.li() 116 self.page.a(request, href="%s/%s" % (self.env.get_url().rstrip("/"), request)) 117 self.page.li.close() 118 119 self.page.ul.close() 120 121 def show_request(self, path_info): 122 123 "Show a request using the given 'path_info' for the current user." 124 125 uid = path_info.lstrip("/").split("/", 1)[0] 126 f = uid and self.store.get_event(self.user, uid) or None 127 128 if not f: 129 return False 130 131 request = parse_object(f, "utf-8") 132 133 if not request: 134 return False 135 136 # Handle a submitted form. 137 138 args = self.env.get_args() 139 show_form = False 140 141 freebusy = self.store.get_freebusy(self.user) 142 143 # When accepting, do so only on behalf of this user. 144 145 if args.has_key("accept"): 146 organisers = map(get_address, get_values(request, "ORGANIZER")) 147 148 for attendee, attendee_attr in get_items(request, "ATTENDEE"): 149 if attendee == self.user: 150 attendee_attr["PARTSTAT"] = "ACCEPTED" 151 request["ATTENDEE"] = [(attendee, attendee_attr)] 152 153 # Create a full calendar object and send it. 154 # NOTE: Should support more than just events. 155 # NOTE: Should parameterise the subject and body text. 156 157 event = to_node({"VEVENT" : [(request, {})]}) 158 part = to_part("REPLY", [event]) 159 message = make_message([part], organisers, get_address(attendee), "Response to request", "Response to a calendar request") 160 sendmail(get_address(attendee), organisers, message.as_string()) 161 162 # Remove the request from the list. 163 164 requests = self.store.get_requests(self.user) 165 if uid in requests: 166 requests.remove(uid) 167 self.store.set_requests(self.user, requests) 168 169 # Update the free/busy information. 170 171 periods = get_periods(request) 172 update_freebusy(freebusy, attendee, periods, get_value(request, "TRANSP"), uid, self.store) 173 174 if self.publisher: 175 self.publisher.set_freebusy(attendee, freebusy) 176 177 break 178 179 elif args.has_key("decline"): 180 pass 181 elif args.has_key("ignore"): 182 pass 183 else: 184 show_form = True 185 186 self.new_page(title="Request") 187 188 # Provide a summary of the request. 189 190 self.page.p("The following request was received:") 191 self.page.dl() 192 193 for name in ["SUMMARY", "DTSTART", "DTEND", "ORGANIZER", "ATTENDEE"]: 194 for value in get_values(request, name): 195 self.page.dt(name) 196 self.page.dd(value) 197 198 self.page.dl.close() 199 200 dtstart = format_datetime(get_utc_datetime(request, "DTSTART")) 201 dtend = format_datetime(get_utc_datetime(request, "DTEND")) 202 203 # Indicate whether there are conflicting events. 204 205 if freebusy: 206 207 # Obtain any time zone details from the suggested event. 208 209 _dtstart, attr = get_item(request, "DTSTART") 210 tzid = attr.get("TZID") 211 212 # Show any conflicts. 213 214 for start, end, found_uid in have_conflict(freebusy, [(dtstart, dtend)], True): 215 if uid != found_uid: 216 start = format_datetime(to_timezone(get_datetime(start), tzid)) 217 end = format_datetime(to_timezone(get_datetime(end), tzid)) 218 self.page.p("Event conflicts with another from %s to %s." % (start, end)) 219 220 # Show a form if no action has just been taken. 221 222 if show_form: 223 self.page.p("Action to take for this request:") 224 self.page.form(method="POST") 225 self.page.p() 226 self.page.input(name="accept", type="submit", value="Accept") 227 self.page.add(" ") 228 self.page.input(name="decline", type="submit", value="Decline") 229 self.page.add(" ") 230 self.page.input(name="ignore", type="submit", value="Ignore") 231 self.page.p.close() 232 self.page.form.close() 233 234 return True 235 236 def select_action(self): 237 238 "Select the desired action and show the result." 239 240 path_info = self.env.get_path_info().rstrip("/") 241 if not path_info: 242 self.show_requests() 243 elif self.show_request(path_info): 244 pass 245 else: 246 self.no_page() 247 248 def show(self): 249 250 "Interpret a request and show an appropriate response." 251 252 if not self.user: 253 self.no_user() 254 else: 255 self.select_action() 256 257 # Write the headers and actual content. 258 259 print >>self.out, "Content-Type: text/html; charset=%s" % self.encoding 260 print >>self.out 261 self.out.write(unicode(self.page).encode(self.encoding)) 262 263 if __name__ == "__main__": 264 Manager().show() 265 266 # 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