res_stasis: Add ability to switch applications.
[asterisk/asterisk.git] / res / res_calendar_caldav.c
index d23f9a6..425a1e3 100644 (file)
  */
 
 /*! \file
- * \brief Resource for handling iCalnedar calendars
+ * \brief Resource for handling CalDAV calendars
  */
 
 /*** MODULEINFO
+       <depend>res_calendar</depend>
        <depend>neon</depend>
        <depend>ical</depend>
        <depend>libxml2</depend>
+       <support_level>extended</support_level>
 ***/
-#include "asterisk.h"
 
-ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+#include "asterisk.h"
 
 #include <libical/ical.h>
-#include <neon/ne_session.h>
-#include <neon/ne_uri.h>
-#include <neon/ne_request.h>
-#include <neon/ne_auth.h>
+#include <ne_session.h>
+#include <ne_uri.h>
+#include <ne_request.h>
+#include <ne_auth.h>
+#include <ne_redirect.h>
 #include <libxml/xmlmemory.h>
 #include <libxml/parser.h>
 
 #include "asterisk/module.h"
+#include "asterisk/channel.h"
 #include "asterisk/calendar.h"
 #include "asterisk/lock.h"
 #include "asterisk/config.h"
@@ -76,6 +79,7 @@ static void caldav_destructor(void *obj)
        if (pvt->session) {
                ne_session_destroy(pvt->session);
        }
+       ne_uri_free(&pvt->uri);
        ast_string_field_free_memory(pvt);
 
        ao2_callback(pvt->events, OBJ_UNLINK | OBJ_NODATA | OBJ_MULTIPLE, NULL, NULL);
@@ -122,6 +126,15 @@ static int auth_credentials(void *userdata, const char *realm, int attempts, cha
        return 0;
 }
 
+static int debug_response_handler(void *userdata, ne_request *req, const ne_status *st)
+{
+       if (st->code < 200 || st->code > 299) {
+               ast_debug(1, "Unexpected response from server, %d: %s\n", st->code, st->reason_phrase);
+               return 0;
+       }
+       return 1;
+}
+
 static struct ast_str *caldav_request(struct caldav_pvt *pvt, const char *method, struct ast_str *req_body, struct ast_str *subdir, const char *content_type)
 {
        struct ast_str *response;
@@ -142,17 +155,16 @@ static struct ast_str *caldav_request(struct caldav_pvt *pvt, const char *method
        snprintf(buf, sizeof(buf), "%s%s", pvt->uri.path, subdir ? ast_str_buffer(subdir) : "");
 
        req = ne_request_create(pvt->session, method, buf);
-       ne_add_response_body_reader(req, ne_accept_2xx, fetch_response_reader, &response);
+       ne_add_response_body_reader(req, debug_response_handler, fetch_response_reader, &response);
        ne_set_request_body_buffer(req, ast_str_buffer(req_body), ast_str_strlen(req_body));
        ne_add_request_header(req, "Content-type", ast_strlen_zero(content_type) ? "text/xml" : content_type);
+       ne_add_request_header(req, "Depth", "1");
 
        ret = ne_request_dispatch(req);
        ne_request_destroy(req);
 
-       if (ret != NE_OK || !ast_str_strlen(response)) {
-               if (ret != NE_OK) {
-                       ast_log(LOG_WARNING, "Unknown response to CalDAV calendar %s, request %s to %s: %s\n", pvt->owner->name, method, buf, ne_get_error(pvt->session));
-               }
+       if (ret != NE_OK) {
+               ast_log(LOG_WARNING, "Unknown response to CalDAV calendar %s, request %s to %s: %s\n", pvt->owner->name, method, buf, ne_get_error(pvt->session));
                ast_free(response);
                return NULL;
        }
@@ -178,9 +190,8 @@ static int caldav_write_event(struct ast_calendar_event *event)
                return -1;
        }
        if (!(body = ast_str_create(512)) ||
-               !(subdir = ast_str_create(32)) ||
-               !(response = ast_str_create(512))) {
-               ast_log(LOG_ERROR, "Could not allocate memory for request and response!\n");
+               !(subdir = ast_str_create(32))) {
+               ast_log(LOG_ERROR, "Could not allocate memory for request!\n");
                goto write_cleanup;
        }
 
@@ -192,7 +203,10 @@ static int caldav_write_event(struct ast_calendar_event *event)
                for (x = 0; x < 8; x++) {
                        val[x] = ast_random();
                }
-               ast_string_field_build(event, uid, "%04x%04x-%04x-%04x-%04x-%04x%04x%04x", val[0], val[1], val[2], val[3], val[4], val[5], val[6], val[7]);
+               ast_string_field_build(event, uid, "%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
+                       (unsigned)val[0], (unsigned)val[1], (unsigned)val[2],
+                       (unsigned)val[3], (unsigned)val[4], (unsigned)val[5],
+                       (unsigned)val[6], (unsigned)val[7]);
        }
 
        calendar = icalcomponent_new(ICAL_VCALENDAR_COMPONENT);
@@ -216,6 +230,12 @@ static int caldav_write_event(struct ast_calendar_event *event)
        if (!ast_strlen_zero(event->location)) {
                icalcomponent_add_property(icalevent, icalproperty_new_location(event->location));
        }
+       if (!ast_strlen_zero(event->categories)) {
+               icalcomponent_add_property(icalevent, icalproperty_new_categories(event->categories));
+       }
+       if (event->priority > 0) {
+               icalcomponent_add_property(icalevent, icalproperty_new_priority(event->priority));
+       }
 
        switch (event->busy_state) {
        case AST_CALENDAR_BS_BUSY:
@@ -235,9 +255,9 @@ static int caldav_write_event(struct ast_calendar_event *event)
        ast_str_append(&body, 0, "%s", icalcomponent_as_ical_string(calendar));
        ast_str_set(&subdir, 0, "%s%s.ics", pvt->url[strlen(pvt->url) - 1] == '/' ? "" : "/", event->uid);
 
-       response = caldav_request(pvt, "PUT", body, subdir, "text/calendar");
-
-       ret = 0;
+       if ((response = caldav_request(pvt, "PUT", body, subdir, "text/calendar"))) {
+               ret = 0;
+       }
 
 write_cleanup:
        if (body) {
@@ -293,11 +313,15 @@ static struct ast_str *caldav_get_events_between(struct caldav_pvt *pvt, time_t
 
        response = caldav_request(pvt, "REPORT", body, NULL, NULL);
        ast_free(body);
+       if (response && !ast_str_strlen(response)) {
+               ast_free(response);
+               return NULL;
+       }
 
        return response;
 }
 
-static time_t icalfloat_to_timet(icaltimetype time) 
+static time_t icalfloat_to_timet(icaltimetype time)
 {
        struct ast_tm tm = {0,};
        struct timeval tv;
@@ -365,6 +389,14 @@ static void caldav_add_event(icalcomponent *comp, struct icaltime_span *span, vo
                ast_string_field_set(event, location, icalproperty_get_value_as_string(prop));
        }
 
+       if ((prop = icalcomponent_get_first_property(comp, ICAL_CATEGORIES_PROPERTY))) {
+               ast_string_field_set(event, categories, icalproperty_get_value_as_string(prop));
+       }
+
+       if ((prop = icalcomponent_get_first_property(comp, ICAL_PRIORITY_PROPERTY))) {
+               event->priority = icalvalue_get_integer(icalproperty_get_value(prop));
+       }
+
        if ((prop = icalcomponent_get_first_property(comp, ICAL_UID_PROPERTY))) {
                ast_string_field_set(event, uid, icalproperty_get_value_as_string(prop));
        } else {
@@ -373,7 +405,7 @@ static void caldav_add_event(icalcomponent *comp, struct icaltime_span *span, vo
                        ast_string_field_set(event, uid, event->summary);
                } else {
                        char tmp[100];
-                       snprintf(tmp, sizeof(tmp), "%lu", event->start);
+                       snprintf(tmp, sizeof(tmp), "%ld", event->start);
                        ast_string_field_set(event, uid, tmp);
                }
        }
@@ -389,10 +421,12 @@ static void caldav_add_event(icalcomponent *comp, struct icaltime_span *span, vo
                        return;
                }
                data = icalproperty_get_attendee(prop);
-               if (!ast_strlen_zero(data)) {
-                       attendee->data = ast_strdup(data);;
-                       AST_LIST_INSERT_TAIL(&event->attendees, attendee, next);
+               if (ast_strlen_zero(data)) {
+                       ast_free(attendee);
+                       continue;
                }
+               attendee->data = ast_strdup(data);
+               AST_LIST_INSERT_TAIL(&event->attendees, attendee, next);
        }
 
 
@@ -428,7 +462,7 @@ static void caldav_add_event(icalcomponent *comp, struct icaltime_span *span, vo
                /* XXX Technically you can check RELATED to see if the event fires from the END of the event
                 * But, I'm not sure I've ever seen anyone implement it in calendaring software, so I'm ignoring for now */
                tmp = icaltime_add(start, trigger.duration);
-               event->alarm = icaltime_as_timet_with_zone(tmp, utc);
+               event->alarm = icaltime_as_timet_with_zone(tmp, icaltime_get_timezone(start));
        }
 
        ao2_link(pvt->events, event);
@@ -445,17 +479,26 @@ struct xmlstate {
        time_t end;
 };
 
-static void handle_start_element(void *data, const xmlChar *fullname, const xmlChar **atts)
+static const xmlChar *caldav_node_localname = BAD_CAST "calendar-data";
+static const xmlChar *caldav_node_nsuri     = BAD_CAST "urn:ietf:params:xml:ns:caldav";
+
+static void handle_start_element(void *data,
+                                                                const xmlChar *localname, const xmlChar *prefix, const xmlChar *uri,
+                                                                int nb_namespaces, const xmlChar **namespaces,
+                                                                int nb_attributes, int nb_defaulted, const xmlChar **attributes)
 {
        struct xmlstate *state = data;
 
-       if (!xmlStrcasecmp(fullname, BAD_CAST "C:calendar-data")) {
-               state->in_caldata = 1;
-               ast_str_reset(state->cdata);
+       if (xmlStrcmp(localname, caldav_node_localname) || xmlStrcmp(uri, caldav_node_nsuri)) {
+               return;
        }
+
+       state->in_caldata = 1;
+       ast_str_reset(state->cdata);
 }
 
-static void handle_end_element(void *data, const xmlChar *name)
+static void handle_end_element(void *data,
+                                                          const xmlChar *localname, const xmlChar *prefix, const xmlChar *uri)
 {
        struct xmlstate *state = data;
        struct icaltimetype start, end;
@@ -463,7 +506,7 @@ static void handle_end_element(void *data, const xmlChar *name)
        icalcomponent *iter;
        icalcomponent *comp;
 
-       if (xmlStrcasecmp(name, BAD_CAST "C:calendar-data")) {
+       if (xmlStrcmp(localname, caldav_node_localname) || xmlStrcmp(uri, caldav_node_nsuri)) {
                return;
        }
 
@@ -526,9 +569,23 @@ static int update_caldav(struct caldav_pvt *pvt)
        state.start = start;
        state.end = end;
 
+       /*
+        * We want SAX2, so you assume that we want to call xmlSAXVersion() here, and
+        * that certainly seems like the right thing to do, but the default SAX
+        * handling functions assume that the 'data' pointer is going to be a
+        * xmlParserCtxtPtr, not a user data pointer, so we have to make sure that we
+        * are only calling the handlers that we control.
+        *
+        * So instead we hack things up a bit, clearing the struct and then assigning
+        * the magic number manually.
+        *
+        * There may be a cleaner way to do this, but frankly the libxml2 docs are
+        * pretty sparse.
+        */
        memset(&saxHandler, 0, sizeof(saxHandler));
-       saxHandler.startElement = handle_start_element;
-       saxHandler.endElement = handle_end_element;
+       saxHandler.initialized = XML_SAX2_MAGIC;
+       saxHandler.startElementNs = handle_start_element;
+       saxHandler.endElementNs = handle_end_element;
        saxHandler.characters = handle_characters;
 
        xmlSAXUserParseMemory(&saxHandler, &state, ast_str_buffer(response), ast_str_strlen(response));
@@ -629,8 +686,9 @@ static void *caldav_load_calendar(void *void_data)
        }
 
        pvt->session = ne_session_create(pvt->uri.scheme, pvt->uri.host, pvt->uri.port);
+       ne_redirect_register(pvt->session);
        ne_set_server_auth(pvt->session, auth_credentials, pvt);
-       if (!strncasecmp(pvt->uri.scheme, "https", sizeof(pvt->uri.scheme))) {
+       if (!strcasecmp(pvt->uri.scheme, "https")) {
                ne_ssl_trust_default_ca(pvt->session);
                ne_ssl_set_verify(pvt->session, verify_cert, NULL);
        }
@@ -690,7 +748,10 @@ static int unload_module(void)
        return 0;
 }
 
-AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Asterisk CalDAV Calendar Integration",
-               .load = load_module,
-               .unload = unload_module,
-       );
+AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Asterisk CalDAV Calendar Integration",
+       .support_level = AST_MODULE_SUPPORT_EXTENDED,
+       .load = load_module,
+       .unload = unload_module,
+       .load_pri = AST_MODPRI_DEVSTATE_PLUGIN,
+       .requires = "res_calendar",
+);