resource_applications.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2013, Digium, Inc.
 *
 * David M. Lee, II <[email protected]>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*! \file
 *
 * \brief /api-docs/applications.{format} implementation - Stasis application
 * resources
 *
 * \author David M. Lee, II <[email protected]>
 */

#include "asterisk.h"

#include "asterisk/stasis_app.h"
#include "resource_applications.h"

static int append_json(void *obj, void *arg, int flags)
{
   const char *app = obj;
   struct ast_json *array = arg;

   ast_json_array_append(array, stasis_app_to_json(app));

   return 0;
}

void ast_ari_applications_list(struct ast_variable *headers,
   struct ast_ari_applications_list_args *args,
   struct ast_ari_response *response)
{
   RAII_VAR(struct ao2_container *, apps, NULL, ao2_cleanup);
   RAII_VAR(struct ast_json *, json, NULL, ast_json_unref);
   size_t count;

   apps = stasis_app_get_all();
   json = ast_json_array_create();
   if (!apps || !json) {
      ast_ari_response_error(response, 500, "Internal Server Error",
         "Allocation failed");
      return;
   }

   ao2_lock(apps);
   count = ao2_container_count(apps);
   ao2_callback(apps, OBJ_NOLOCK | OBJ_NODATA, append_json, json);
   ao2_unlock(apps);

   if (count != ast_json_array_size(json)) {
      ast_ari_response_error(response, 500, "Internal Server Error",
         "Allocation failed");
      return;
   }

   ast_ari_response_ok(response, ast_json_ref(json));
}

void ast_ari_applications_get(struct ast_variable *headers,
   struct ast_ari_applications_get_args *args,
   struct ast_ari_response *response)
{
   struct ast_json *json;

   json = stasis_app_to_json(args->application_name);

   if (!json) {
      ast_ari_response_error(response, 404, "Not Found",
         "Application not found");
      return;
   }

   ast_ari_response_ok(response, json);
}

void ast_ari_applications_subscribe(struct ast_variable *headers,
   struct ast_ari_applications_subscribe_args *args,
   struct ast_ari_response *response)
{
   RAII_VAR(struct ast_json *, json, NULL, ast_json_unref);
   enum stasis_app_subscribe_res res;

   if (args->event_source_count <= 0) {
      ast_ari_response_error(response, 400, "Bad Request",
         "Missing parameter eventSource");
      return;
   }

   if (ast_strlen_zero(args->application_name)) {
      ast_ari_response_error(response, 400, "Bad Request",
         "Missing parameter applicationName");
      return;
   }

   res = stasis_app_subscribe(args->application_name, args->event_source,
      args->event_source_count, &json);

   switch (res) {
   case STASIS_ASR_OK:
      ast_ari_response_ok(response, ast_json_ref(json));
      break;
   case STASIS_ASR_APP_NOT_FOUND:
      ast_ari_response_error(response, 404, "Not Found",
         "Application not found");
      break;
   case STASIS_ASR_EVENT_SOURCE_NOT_FOUND:
      ast_ari_response_error(response, 422, "Unprocessable Entity",
         "Event source does not exist");
      break;
   case STASIS_ASR_EVENT_SOURCE_BAD_SCHEME:
      ast_ari_response_error(response, 400, "Bad Request",
         "Invalid event source URI scheme");
      break;
   case STASIS_ASR_INTERNAL_ERROR:
      ast_ari_response_error(response, 500, "Internal Server Error",
         "Error processing request");
      break;
   }
}

void ast_ari_applications_unsubscribe(struct ast_variable *headers,
   struct ast_ari_applications_unsubscribe_args *args,
   struct ast_ari_response *response)
{
   RAII_VAR(struct ast_json *, json, NULL, ast_json_unref);
   enum stasis_app_subscribe_res res;

   if (args->event_source_count == 0) {
      ast_ari_response_error(response, 400, "Bad Request",
         "Missing parameter eventSource");
      return;
   }

   res = stasis_app_unsubscribe(args->application_name, args->event_source,
      args->event_source_count, &json);

   switch (res) {
   case STASIS_ASR_OK:
      ast_ari_response_ok(response, ast_json_ref(json));
      break;
   case STASIS_ASR_APP_NOT_FOUND:
      ast_ari_response_error(response, 404, "Not Found",
         "Application not found");
      break;
   case STASIS_ASR_EVENT_SOURCE_NOT_FOUND:
      ast_ari_response_error(response, 422, "Unprocessable Entity",
         "Event source was not subscribed to");
      break;
   case STASIS_ASR_EVENT_SOURCE_BAD_SCHEME:
      ast_ari_response_error(response, 400, "Bad Request",
         "Invalid event source URI scheme");
      break;
   case STASIS_ASR_INTERNAL_ERROR:
      ast_ari_response_error(response, 500, "Internal Server Error",
         "Error processing request");
   }
}

void ast_ari_applications_filter(struct ast_variable *headers,
   struct ast_ari_applications_filter_args *args,
   struct ast_ari_response *response)
{
   struct stasis_app *app = stasis_app_get_by_name(args->application_name);

   if (!app) {
      ast_ari_response_error(response, 404, "Not Found", "Application not found");
      return;
   }

   if (stasis_app_event_filter_set(app, args->filter)) {
      ast_ari_response_error(response, 400, "Bad Request", "Invalid format definition");
   } else {
      ast_ari_response_ok(response, stasis_app_object_to_json(app));
   }

   ao2_ref(app, -1);
}