Support for icalendar format

daemon.py

@@ -679,6 +679,16 @@ class PubServer(BaseHTTPRequestHandler):
             return False
         return True
 
+    def _request_icalendar(self) -> bool:
+        """Should an icalendar response be given?
+        """
+        if not self.headers.get('Accept'):
+            return False
+        accept_str = self.headers['Accept']
+        if 'text/calendar' in accept_str:
+            return True
+        return False
+
     def _signed_ge_tkey_id(self) -> str:
         """Returns the actor from the signed GET key_id
         """
@@ -14056,9 +14066,12 @@ class PubServer(BaseHTTPRequestHandler):
 
         # is this a html request?
         html_getreq = False
+        icalendar_getreq = False
         if self._has_accept(calling_domain):
             if self._request_http():
                 html_getreq = True
+            elif self._request_icalendar():
+                icalendar_getreq = True
         else:
             if self.headers.get('Connection'):
                 # https://developer.mozilla.org/en-US/
@@ -15532,7 +15545,7 @@ class PubServer(BaseHTTPRequestHandler):
                             '_GET', 'search screen shown done',
                             self.server.debug)
 
-        # Show the calendar for a user
+        # Show the html calendar for a user
         if html_getreq and users_in_path:
             if '/calendar' in self.path:
                 nickname = self.path.split('/users/')[1]
@@ -15551,9 +15564,11 @@ class PubServer(BaseHTTPRequestHandler):
                                     self.server.http_prefix,
                                     self.server.domain_full,
                                     self.server.text_mode_banner,
-                                    access_keys).encode('utf-8')
+                                    access_keys,
+                                    False).encode('utf-8')
                 msglen = len(msg)
-                self._set_headers('text/html', msglen, cookie, calling_domain,
+                self._set_headers('text/html',
+                                  msglen, cookie, calling_domain,
                                   False)
                 self._write(msg)
                 fitness_performance(getreq_start_time, self.server.fitness,
@@ -15562,6 +15577,38 @@ class PubServer(BaseHTTPRequestHandler):
                 self.server.getreq_busy = False
                 return
 
+        # Show the icalendar for a user
+        if icalendar_getreq and users_in_path:
+            if '/calendar' in self.path:
+                nickname = self.path.split('/users/')[1]
+                if '/' in nickname:
+                    nickname = nickname.split('/')[0]
+
+                access_keys = self.server.access_keys
+                if self.server.key_shortcuts.get(nickname):
+                    access_keys = self.server.key_shortcuts[nickname]
+
+                # show the calendar screen
+                msg = html_calendar(self.server.person_cache,
+                                    self.server.css_cache,
+                                    self.server.translate,
+                                    self.server.base_dir, self.path,
+                                    self.server.http_prefix,
+                                    self.server.domain_full,
+                                    self.server.text_mode_banner,
+                                    access_keys,
+                                    True).encode('utf-8')
+                msglen = len(msg)
+                self._set_headers('text/calendar',
+                                  msglen, cookie, calling_domain,
+                                  False)
+                self._write(msg)
+                fitness_performance(getreq_start_time, self.server.fitness,
+                                    '_GET', 'icalendar shown',
+                                    self.server.debug)
+                self.server.getreq_busy = False
+                return
+
         fitness_performance(getreq_start_time, self.server.fitness,
                             '_GET', 'calendar shown done',
                             self.server.debug)

epicyon-calendar.css

@@ -32,6 +32,9 @@
     --calendar-header-font-style: italic;
     --main-link-color-hover: blue;
     --rendering: normal;
+    --ical-icon-size: 32px;
+    --ical-icon-size-mobile: 80px;
+    --ical-icon-size-tiny: 80px;
 }
 
 @font-face {
@@ -256,6 +259,10 @@ tr:nth-child(even) > .calendar__day__cell:nth-child(even) {
     body {
         font-size: var(--font-size-calendar);
     }
+    img ical {
+        width: var(--ical-icon-size);
+        float: right;
+    }
 }
 
 @media screen and (max-width: 1000px) {
@@ -276,6 +283,10 @@ tr:nth-child(even) > .calendar__day__cell:nth-child(even) {
     body {
         font-size: var(--font-size-calendar-mobile);
     }
+    img ical {
+        width: var(--ical-icon-size-mobile);
+        float: right;
+    }
 }
 
 @media screen and (max-width: 480px) {
@@ -296,4 +307,8 @@ tr:nth-child(even) > .calendar__day__cell:nth-child(even) {
     body {
         font-size: var(--font-size-calendar-tiny);
     }
+    img ical {
+        width: var(--ical-icon-size-tiny);
+        float: right;
+    }
 }

happening.py

@@ -18,6 +18,8 @@ from utils import save_json
 from utils import locate_post
 from utils import has_object_dict
 from utils import acct_dir
+from utils import remove_html
+from utils import get_display_name
 
 
 def _valid_uuid(test_uuid: str, version: int):
@@ -175,20 +177,20 @@ def _is_happening_post(post_json_object: {}) -> bool:
 
 
 def get_todays_events(base_dir: str, nickname: str, domain: str,
-                      currYear: int, currMonthNumber: int,
+                      curr_year: int, curr_month_number: int,
                       currDayOfMonth: int) -> {}:
     """Retrieves calendar events for today
     Returns a dictionary of lists containing Event and Place activities
     """
     now = datetime.now()
-    if not currYear:
+    if not curr_year:
         year = now.year
     else:
-        year = currYear
+        year = curr_year
-    if not currMonthNumber:
+    if not curr_month_number:
         month_number = now.month
     else:
-        month_number = currMonthNumber
+        month_number = curr_month_number
     if not currDayOfMonth:
         day_number = now.day
     else:
@@ -263,13 +265,181 @@ def get_todays_events(base_dir: str, nickname: str, domain: str,
     return events
 
 
+def _icalendar_day(base_dir: str, nickname: str, domain: str,
+                   day_events: [], person_cache: {}) -> str:
+    """Returns a day's events in icalendar format
+    """
+    ical_str = ''
+    for event_post in day_events:
+        event_description = None
+        event_place = None
+        post_id = None
+        sender_name = ''
+        sender_actor = None
+        event_is_public = False
+        event_start = None
+        event_end = None
+
+        for evnt in event_post:
+            if evnt['type'] == 'Event':
+                if evnt.get('post_id'):
+                    post_id = evnt['post_id']
+                if evnt.get('startTime'):
+                    event_start = \
+                        datetime.strptime(evnt['startTime'],
+                                          "%Y%m%dT%H%M%S%Z")
+                    evnt_end = evnt['startTime'] + timedelta(hours=1)
+                    event_end = \
+                        datetime.strptime(evnt_end,
+                                          "%Y%m%dT%H%M%S%Z")
+                if 'public' in evnt:
+                    if evnt['public'] is True:
+                        event_is_public = True
+                if evnt.get('sender'):
+                    # get display name from sending actor
+                    if evnt.get('sender'):
+                        sender_actor = evnt['sender']
+                        disp_name = \
+                            get_display_name(base_dir, sender_actor,
+                                             person_cache)
+                        if disp_name:
+                            sender_name = \
+                                '<a href="' + sender_actor + '">' + \
+                                disp_name + '</a>: '
+                if evnt.get('name'):
+                    event_description = evnt['name'].strip()
+            elif evnt['type'] == 'Place':
+                if evnt.get('name'):
+                    event_place = evnt['name']
+
+        if not post_id or not event_start or \
+           not event_description or not sender_actor:
+            continue
+
+        # find the corresponding post
+        post_filename = locate_post(base_dir, nickname, domain, post_id)
+        if not post_filename:
+            continue
+
+        post_json_object = load_json(post_filename)
+        if not post_json_object:
+            continue
+
+        # get the published date from the post
+        if not post_json_object.get('object'):
+            continue
+        if not isinstance(post_json_object['object'], dict):
+            continue
+        if not post_json_object['object'].get('published'):
+            continue
+        if not isinstance(post_json_object['object']['published'], str):
+            continue
+        published = post_json_object['object']['published']
+        published = published.replace('-', '')
+        published = published.replace(':', '')
+        published = published.replace(' ', '')
+
+        ical_str += \
+            'BEGIN:VEVENT\n' + \
+            'DTSTAMP:' + published + '\n' + \
+            'UID:' + post_id + '\n' + \
+            'DTSTART:' + event_start + '\n' + \
+            'DTEND:' + event_end + '\n' + \
+            'STATUS:CONFIRMED\n'
+        descr = remove_html(event_description)
+        if len(descr) < 255:
+            ical_str += \
+                'SUMMARY:' + descr + '\n'
+        else:
+            ical_str += \
+                'SUMMARY:' + descr[255:] + '\n'
+            ical_str += \
+                'DESCRIPTION:' + descr + '\n'
+        if event_is_public:
+            ical_str += \
+                'CATEGORIES:APPOINTMENT,PUBLIC\n'
+        else:
+            ical_str += \
+                'CATEGORIES:APPOINTMENT\n'
+        if sender_name:
+            ical_str += \
+                'ORGANIZER;CN=' + remove_html(sender_name) + ':' + \
+                sender_actor + '\n'
+        else:
+            ical_str += \
+                'ORGANIZER:' + sender_actor + '\n'
+        if event_place:
+            ical_str += \
+                'LOCATION:' + remove_html(event_place) + '\n'
+        ical_str += 'END:VEVENT\n'
+    return ical_str
+
+
+def get_todays_events_icalendar(base_dir: str, nickname: str, domain: str,
+                                year: int, month_number: int,
+                                day_number: int, person_cache: {}) -> str:
+    """Returns today's events in icalendar format
+    """
+    events = \
+        get_todays_events(base_dir, nickname, domain,
+                          year, month_number, day_number)
+    ical_str = \
+        'BEGIN:VCALENDAR\n' + \
+        'PRODID:-//Fediverse//NONSGML Epicyon//EN' + \
+        'VERSION:2.0'
+    if not events:
+        ical_str += 'END:VCALENDAR\n'
+        return ical_str
+
+    if not events.get(str(day_number)):
+        ical_str += 'END:VCALENDAR\n'
+        return ical_str
+
+    day_events = events[str(day_number)]
+
+    ical_str += \
+        _icalendar_day(base_dir, nickname, domain, day_events, person_cache)
+
+    ical_str += 'END:VCALENDAR\n'
+    return ical_str
+
+
+def get_month_events_icalendar(base_dir: str, nickname: str, domain: str,
+                               curr_year: int,
+                               curr_month_number: int,
+                               person_cache: {}) -> str:
+    """Returns today's events in icalendar format
+    """
+    events = \
+        get_calendar_events(base_dir, nickname, domain, curr_year,
+                            curr_month_number)
+    ical_str = \
+        'BEGIN:VCALENDAR\n' + \
+        'PRODID:-//Fediverse//NONSGML Epicyon//EN' + \
+        'VERSION:2.0'
+    if not events:
+        ical_str += 'END:VCALENDAR\n'
+        return ical_str
+
+    for day_number in range(1, 32):
+        if not events.get(str(day_number)):
+            continue
+        day_events = events[str(day_number)]
+        ical_str += \
+            _icalendar_day(base_dir, nickname, domain, day_events,
+                           person_cache)
+
+    ical_str += 'END:VCALENDAR\n'
+    return ical_str
+
+
 def day_events_check(base_dir: str, nickname: str, domain: str,
-                     currDate) -> bool:
+                     curr_date) -> bool:
     """Are there calendar events for the given date?
     """
-    year = currDate.year
+    year = curr_date.year
-    month_number = currDate.month
+    month_number = curr_date.month
-    day_number = currDate.day
+    day_number = curr_date.day
 
     calendar_filename = \
         acct_dir(base_dir, nickname, domain) + \

webapp_calendar.py

@@ -24,6 +24,8 @@ from utils import local_actor_url
 from utils import replace_users_with_at
 from happening import get_todays_events
 from happening import get_calendar_events
+from happening import get_todays_events_icalendar
+from happening import get_month_events_icalendar
 from webapp_utils import set_custom_background
 from webapp_utils import html_header_with_external_style
 from webapp_utils import html_footer
@@ -241,6 +243,13 @@ def _html_calendar_day(person_cache: {}, css_cache: {}, translate: {},
                     event_place + '</span></td>' + \
                     delete_button_str + '</tr>\n'
 
+    # icalendar download link
+    calendar_str += \
+        '    <a href="/users/' + path + '?ical=true" ' + \
+        'download="icalendar.ics">' + \
+        '<img class="ical" src="/icons/ical.png" ' + \
+        'title="iCalendar" alt="iCalendar" /></a>\n'
+
     calendar_str += '</tbody>\n'
     calendar_str += '</table></main>\n'
     calendar_str += html_footer()
@@ -251,7 +260,8 @@ def _html_calendar_day(person_cache: {}, css_cache: {}, translate: {},
 def html_calendar(person_cache: {}, css_cache: {}, translate: {},
                   base_dir: str, path: str,
                   http_prefix: str, domain_full: str,
-                  text_mode_banner: str, access_keys: {}) -> str:
+                  text_mode_banner: str, access_keys: {},
+                  icalendar: bool) -> str:
     """Show the calendar for a person
     """
     domain = remove_domain_port(domain_full)
@@ -277,6 +287,10 @@ def html_calendar(person_cache: {}, css_cache: {}, translate: {},
                         num_str = part.split('=')[1]
                         if num_str.isdigit():
                             day_number = int(num_str)
+                    elif part.split('=')[0] == 'ical':
+                        bool_str = part.split('=')[1]
+                        if bool_str.tolower().startswith('t'):
+                            icalendar = True
             first = False
         actor = actor.split('?')[0]
 
@@ -297,6 +311,13 @@ def html_calendar(person_cache: {}, css_cache: {}, translate: {},
     month_name = translate[months[month_number - 1]]
 
     if day_number:
+        if icalendar:
+            return get_todays_events_icalendar(base_dir,
+                                               nickname, domain,
+                                               year, month_number,
+                                               day_number,
+                                               person_cache)
+
         day_events = None
         events = \
             get_todays_events(base_dir, nickname, domain,
@@ -310,6 +331,10 @@ def html_calendar(person_cache: {}, css_cache: {}, translate: {},
                                   nickname, domain, day_events,
                                   month_name, actor)
 
+    if icalendar:
+        return get_month_events_icalendar(base_dir, nickname, domain,
+                                          year, month_number, person_cache)
+
     events = \
         get_calendar_events(base_dir, nickname, domain, year, month_number)