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/*
* Copyright (C) 2016-2020 "IoT.bzh"
*
* Author "Romain Forlot" <romain.forlot@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <dirent.h>
#include <afb/afb-binding.h>
#include "platform-info-binding.h"
#include "platform-info-devices.h"
#ifndef PLATFORM_INFO_DIR
#define PLATFORM_INFO_DIR "/etc/platform-info"
#endif
#ifndef HOTPLUG_NS
#define HOTPLUG_NS "hotplug"
#endif
void afv_get(afb_req_t req) {
pinfo_api_ctx_t *api_ctx = (pinfo_api_ctx_t*)afb_api_get_userdata(req->api);
if(api_ctx) {
json_object *result = NULL;
json_object *args = afb_req_json(req);
switch (json_object_get_type(args)) {
case json_type_null:
result = api_ctx->info;
break;
case json_type_string: {
char *json_path = NULL;
char *full_json_path = NULL;
full_json_path = strdupa(json_object_get_string(args));
result = api_ctx->info;
for(json_path = strtok(full_json_path, ".");
json_path && *json_path;
json_path = strtok(NULL, ".")) {
if(! json_object_object_get_ex(result, json_path, &result)) {
afb_req_fail(req, "A key hasn't been found in JSON path.", json_path);
return;
}
}
break;
}
default:
afb_req_fail(req, "Type error", "Argument type is unknown, you must provide a string only");
return;
}
afb_req_success(req, json_object_get(result), NULL);
} else {
afb_req_fail(req,"failed","The API contains no context!");
}
}
void afv_set(afb_req_t req) {
json_object *platform_info = (json_object*) afb_api_get_userdata(req->api);
json_object *args = afb_req_json(req);
#if (JSON_C_VERSION_MAJOR_VERSION == 0 && JSON_C_VERSION_MINOR_VERSION >= 13)
if(json_object_object_add(platform_info, HOTPLUG_NS, args)) {
afb_req_fail(req, "Addition fails", NULL);
return;
}
#else
json_object_object_add(platform_info, HOTPLUG_NS, args);
#endif
afb_req_success(req, NULL, NULL);
}
// TODO RFOR: interface with inotify
void afv_unsubscribe(afb_req_t req) {
pinfo_client_ctx_t* client_ctx = NULL;
client_ctx = (pinfo_client_ctx_t*)afb_req_context_get(req);
if(client_ctx) {
const char* event_str = afb_req_value(req,"event");
if(event_str && strcmp("monitor-devices",event_str) == 0) {
afb_req_unsubscribe(req,client_ctx->ev_devs_changed);
afb_req_context_clear(req);
afb_req_success(req,NULL, NULL);
} else {
afb_req_fail(req,"failed","No 'event' value provided.");
}
} else {
afb_req_fail(req,"failed","No context available for the client.");
}
}
void afv_subscribe(afb_req_t req) {
const char* event_str = NULL;
event_str = afb_req_value(req,"event");
if(event_str && strcmp("monitor-devices",event_str) == 0) {
if(!afb_req_context_get(req)) {
if(pinfo_device_monitor(req) == PINFO_OK) {
afb_req_success(req,NULL,NULL);
} else {
afb_req_fail(req,"failed","Unable to create new context");
}
} else {
afb_req_fail(req,"failed","The client already subscribed.");
}
} else {
afb_req_fail(req,"failed","Invalid event subscription");
}
}
static json_object*
afv_static_info(const char* dir) {
struct dirent* dir_ent = NULL;
DIR* dir_handle = opendir(dir);
json_object* static_info = NULL;
if (! dir_handle) {
AFB_ERROR("The directory %s does not exist.", PLATFORM_INFO_DIR);
return NULL;
}
static_info = json_object_new_object();
while( (dir_ent = readdir(dir_handle)) != NULL) {
if(dir_ent->d_type == DT_REG && dir_ent->d_name[0] != '.') {
json_object* current_file = NULL;
size_t filepath_len = strlen(PLATFORM_INFO_DIR) + strlen(dir_ent->d_name) + 2;
char *filepath = alloca(filepath_len);
filepath = strncpy(filepath, PLATFORM_INFO_DIR, filepath_len);
filepath = strncat(filepath, "/", filepath_len - strlen(filepath) - 1);
filepath = strncat(filepath, dir_ent->d_name, filepath_len - strlen(filepath) - 1);
AFB_DEBUG("File in processing: %s", filepath);
current_file = json_object_from_file(filepath);
#if (JSON_C_VERSION_MAJOR_VERSION == 0 && JSON_C_VERSION_MINOR_VERSION >= 13)
const char *error = NULL;
if( (error = json_util_get_last_err()) ) {
AFB_NOTICE("This file '%s' isn't a JSON file or have error: %s. len: %ld", filepath, error, filepath_len);
continue;
}
#else
if( current_file == NULL ) {
AFB_NOTICE("This file '%s' isn't a JSON file or have error.", filepath);
continue;
}
#endif
wrap_json_object_add(static_info, current_file);
AFB_DEBUG("JSON loaded: %s",
json_object_to_json_string_ext(current_file,JSON_C_TO_STRING_PRETTY));
}
}
return static_info;
}
int init(afb_api_t api) {
// Initializing the platform_info binding object and associated it to
// the api
AFB_DEBUG("init() ...");
pinfo_api_ctx_t *api_ctx = NULL;
int ret = PINFO_OK;
api_ctx = malloc(sizeof(*api_ctx));
if(api_ctx) {
AFB_DEBUG("init() ... OK");
api_ctx->info = afv_static_info(PLATFORM_INFO_DIR);
AFB_API_DEBUG(api,"The API static data: %s",
json_object_to_json_string_ext(api_ctx->info, JSON_C_TO_STRING_PRETTY));
api_ctx->client_count = 0;
afb_api_set_userdata(api, (void*)api_ctx);
} else {
AFB_API_WARNING(api,"Failed to load the static data");
ret = PINFO_ERR;
}
return ret;
}
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