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authorRomain Forlot <romain.forlot@iot.bzh>2017-09-15 16:29:17 +0200
committerRomain Forlot <romain.forlot@iot.bzh>2017-12-14 11:00:25 +0100
commit677cde6288a4574b8251a4a532b1d9e1594b09b2 (patch)
treec510a0cdd76e2b8de1cdaf254fd270c8bfebae42 /plugins/low-can.c
parenteabae24ea592420de46e36f0b1af5d39eee5b8a4 (diff)
Subscription by plugin to signals
Change-Id: Icb923f87df2be8eb664106bc9077b3a8221dd3ce Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
Diffstat (limited to 'plugins/low-can.c')
-rw-r--r--plugins/low-can.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/plugins/low-can.c b/plugins/low-can.c
new file mode 100644
index 0000000..3988026
--- /dev/null
+++ b/plugins/low-can.c
@@ -0,0 +1,157 @@
+/*
+ * Copyright (C) 2016 "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 // needed for vasprintf
+
+#define AFB_BINDING_VERSION 2
+#include <afb/afb-binding.h>
+#include <systemd/sd-event.h>
+#include <json-c/json_object.h>
+#include <stdbool.h>
+#include <string.h>
+
+#include "ctl-plugin.h"
+#include "wrap-json.h"
+
+CTLP_REGISTER("low-can");
+
+typedef struct {
+ bool door;
+ bool window;
+} doorT;
+
+typedef struct {
+ doorT* front_left;
+ doorT* front_right;
+ doorT* rear_left;
+ doorT* rear_right;
+} allDoorsCtxT;
+
+// Call at initialisation time
+CTLP_ONLOAD(plugin, api) {
+ allDoorsCtxT *allDoorCtx = (allDoorsCtxT*)calloc (1, sizeof(allDoorsCtxT));
+ memset(allDoorCtx, 0, sizeof(allDoorsCtxT));
+
+ AFB_NOTICE ("Low-can door plugin: label='%s' version='%s' info='%s'", plugin->label, plugin->version, plugin->info);
+ return (void*)allDoorCtx;
+}
+
+CTLP_CAPI (subscribeToLow, source, argsJ, eventJ, context) {
+ json_object* signalArrayJ = NULL, *subscribeArgsJ = NULL, *subscribeFilterJ = NULL, *responseJ = NULL;
+ const char* unit = NULL;
+ double frequency = 0;
+ int err = 0;
+
+ err = wrap_json_unpack(eventJ, "{so,s?s,s?F !}",
+ "signal", &signalArrayJ,
+ "unit", &unit,
+ "frequency", &frequency);
+ if(err)
+ {
+ AFB_ERROR("Problem to unpack JSON object eventJ: %s",
+ json_object_to_json_string(eventJ));
+ return err;
+ }
+
+ if(frequency >= 0)
+ {
+ wrap_json_pack(&subscribeFilterJ, "{sf}", "frequency", frequency);
+ }
+
+ for (int idx = 0; idx < json_object_array_length(signalArrayJ); idx++)
+ {
+ json_object* aSignalJ = json_object_array_get_idx(signalArrayJ, idx);
+ err = wrap_json_pack(&subscribeArgsJ, "{ss, so*}",
+ "event", json_object_get_string(aSignalJ),
+ "filter", subscribeFilterJ);
+ if(err)
+ {
+ AFB_ERROR("Error building subscription query object");
+ return err;
+ }
+ AFB_DEBUG("Calling subscribe with %s", json_object_to_json_string_ext(subscribeArgsJ, JSON_C_TO_STRING_PRETTY));
+ err = afb_service_call_sync("low-can", "subscribe", subscribeArgsJ, &responseJ);
+ if(err)
+ {
+ AFB_ERROR("Can't find api 'low-can'");
+ return err;
+ }
+ }
+
+ return err;
+}
+
+CTLP_CAPI (isOpen, source, argsJ, eventJ, context) {
+
+ const char* eventName;
+ json_object *eventStatus = NULL;
+ long long int *timestamp = NULL;
+ allDoorsCtxT *ctx=(allDoorsCtxT*)context;
+
+ AFB_DEBUG("Here is the situation: source:%s, args:%s, event:%s,\n fld: %s, flw: %s, frd: %s, frw: %s, rld: %s, rlw: %s, rrd: %s, rrw: %s",
+ source->label,
+ json_object_to_json_string(argsJ),
+ json_object_to_json_string(eventJ),
+ ctx->front_left->door ? "true":"false",
+ ctx->front_left->window ? "true":"false",
+ ctx->front_right->door ? "true":"false",
+ ctx->front_right->window ? "true":"false",
+ ctx->rear_left->door ? "true":"false",
+ ctx->rear_left->window ? "true":"false",
+ ctx->rear_right->door ? "true":"false",
+ ctx->rear_right->window ? "true":"false"
+ );
+
+ int err = wrap_json_unpack(eventJ, "{ss,sb,s?F}",
+ "event", &eventName,
+ "value", &eventStatus,
+ "timestamp", &timestamp);
+ if(err)
+ {
+ AFB_ERROR("Error parsing event %s", json_object_to_json_string(eventJ));
+ return -1;
+ }
+
+ if(strcasestr(eventName, "front_left"))
+ {
+ if(strcasestr(eventName, "door")) {ctx->front_left->door = eventStatus;}
+ else if(strcasestr(eventName, "window")) {ctx->front_left->window = eventStatus;}
+ else {AFB_WARNING("Unexpected behavior, this '%s' is not a door ! ", json_object_to_json_string(eventJ));}
+ }
+ else if(strcasestr(eventName, "front_right"))
+ {
+ if(strcasestr(eventName, "door")) {ctx->front_right->door = eventStatus;}
+ else if(strcasestr(eventName, "window")) {ctx->front_right->window = eventStatus;}
+ else {AFB_WARNING("Unexpected behavior, this '%s' is not a door ! ", json_object_to_json_string(eventJ));}
+ }
+ else if(strcasestr(eventName, "rear_left"))
+ {
+ if(strcasestr(eventName, "door")) {ctx->rear_left->door = eventStatus;}
+ else if(strcasestr(eventName, "window")) {ctx->rear_left->window = eventStatus;}
+ else {AFB_WARNING("Unexpected behavior, this '%s' is not a door ! ", json_object_to_json_string(eventJ));}
+ }
+ else if(strcasestr(eventName, "rear_right"))
+ {
+ if(strcasestr(eventName, "door")) {ctx->rear_right->door = eventStatus;}
+ else if(strcasestr(eventName, "window")) {ctx->rear_right->window = eventStatus;}
+ else {AFB_WARNING("Unexpected behavior, this '%s' is not a door ! ", json_object_to_json_string(eventJ));}
+ }
+ else {AFB_WARNING("Unexpected behavior, this '%s' is not a door ! ", json_object_to_json_string(eventJ));}
+
+ return 0;
+}