diff options
Diffstat (limited to 'plugins/low-can.c')
| -rw-r--r-- | plugins/low-can.c | 157 |
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", ×tamp); + 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; +} |