First simple platform-info API implementationguppy_6.99.2guppy/6.99.26.99.2

Bug-AGL: SPEC-1917

Change-Id: I300155302c9d69c6549ddabc6af53e2ad55eb18d
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

1 files changed, 125 insertions, 0 deletions

diff --git a/src/platform-info-binding.c b/src/platform-info-binding.c
new file mode 100644
index 0000000..c6bc9fd
--- /dev/null
+++ b/src/platform-info-binding.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2016, 2018 "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"
+
+#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) {
+	char *json_path = NULL, *full_json_path = NULL;
+	json_object *platform_info = (json_object*) afb_api_get_userdata(req->api);
+	json_object *args = afb_req_json(req), *result = NULL;
+
+	switch (json_object_get_type(args)) {
+		case json_type_null:
+			result = platform_info;
+			break;
+		case json_type_string:
+			full_json_path = strdupa(json_object_get_string(args));
+			result = platform_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, result, NULL);
+}
+
+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 and udev
+void afv_unsubscribe(afb_req_t req) {
+	afb_req_success(req, NULL, NULL);
+}
+
+void afv_subscribe(afb_req_t req) {
+	afb_req_success(req, NULL, NULL);
+}
+
+int init(afb_api_t api) {
+	struct dirent* dir_ent = NULL;
+	DIR* dir_handle = opendir(PLATFORM_INFO_DIR);
+	json_object *json_file = json_object_new_object(), *current_file = NULL;
+
+	while( (dir_ent = readdir(dir_handle)) != NULL) {
+		if(dir_ent->d_type == DT_REG && dir_ent->d_name[0] != '.') {
+			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(json_file, current_file);
+			AFB_DEBUG("JSON loaded: %s", json_object_get_string(json_file));
+		}
+	}
+
+	// Initializing the platform_info binding object and associated it to
+	// the api
+	afb_api_set_userdata(api, (void*)json_file);
+
+	return 0;
+}