aboutsummaryrefslogtreecommitdiffstats
path: root/signal-composer-binding/signal-composer-binding.cpp
blob: 6c605263b426ce912cb99f229413752c8021a855 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
/*
 * Copyright (C) 2015, 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.
*/

#include <string>
#include <string.h>
// afb-utilities
#include <wrap-json.h>
#include <filescan-utils.h>
#include <afb/afb-binding>

#include "signal-composer-apidef.h"
#include "clientApp.hpp"

/// @brief callback for receiving message from low bindings. This will callback
/// an action defined in the configuration files depending on the event received
///
/// @param[in] event - event name
/// @param[in] object - eventual data that comes with the event
void onEvent(const char *event, json_object *object)
{
	std::vector<std::shared_ptr<Signal>> signals { Composer::instance().searchSignals(event) };

	if(!signals.empty())
	{
		// If there is more than 1 element then maybe we can find a more
		// detailled event name in JSON object as 1 event may carry several
		// signals. Try to find that one.
		if(signals.size() > 1)
		{
			bool found = false;
			json_object_iterator iter = json_object_iter_begin(object);
			json_object_iterator iterEnd = json_object_iter_end(object);
			while(!json_object_iter_equal(&iter, &iterEnd))
			{
				json_object *value = json_object_iter_peek_value(&iter);
				if(json_object_is_type(value, json_type_string))
				{
					std::string name = json_object_get_string(value);
					for(auto& sig: signals)
					{
						if(*sig == name)
						{
							found = true;
							sig->onReceivedCB(object);
						}
					}
				}
				json_object_iter_next(&iter);
			}
			// If nothing found in JSON data then apply onReceived callback
			// for all signals found
			if(! found)
			{
				for(auto& sig: signals)
					{sig->onReceivedCB(object);}
			}
		}
		else
			{signals[0]->onReceivedCB(object);}
	}
}

static int one_subscribe_unsubscribe(AFB_ReqT request,
	bool subscribe,
	const std::string& event,
	json_object* args,
	clientAppCtx* cContext)
{
	int err = 0;
	std::vector<std::shared_ptr<Signal>> signals = Composer::instance().searchSignals(event);

	if(signals.size() == 0 && subscribe)
	{
		err--;
	}
	else
	{
		if(subscribe)
		{
			cContext->appendSignals(signals);
			err = cContext->makeSubscription(request);
		}
		else
		{
			cContext->subtractSignals(signals);
			err = cContext->makeUnsubscription(request);
		}
	}

	return err;
}

static int subscribe_unsubscribe(AFB_ReqT request,
	bool subscribe,
	json_object* args,
	clientAppCtx* cContext)
{
	int rc = 0;
	json_object *eventJ = nullptr;
	if (args == NULL || !json_object_object_get_ex(args, "signal", &eventJ))
	{
		rc = one_subscribe_unsubscribe(request, subscribe, "*", args, cContext);
	}
	else if (json_object_get_type(eventJ) == json_type_string)
	{
		rc = one_subscribe_unsubscribe(request, subscribe, json_object_get_string(eventJ), args, cContext);
	}
	else if (json_object_get_type(eventJ) == json_type_array)
	{
		for (int i = 0 ; i < json_object_array_length(eventJ) ; i++)
		{
			json_object *x = json_object_array_get_idx(eventJ, i);
			rc += one_subscribe_unsubscribe(request, subscribe, json_object_get_string(x), args, cContext);
		}
	}
	else {rc = -1;}

	return rc;
}

/// @brief entry point for client subscription request.
static void do_subscribe_unsubscribe(AFB_ReqT request, bool subscribe, clientAppCtx* cContext)
{
	int rc = 0;
	json_object *oneArg = nullptr, *args = afb_req_json(request);
	if (json_object_get_type(args) == json_type_array)
	{
		for (int i = 0 ; i < json_object_array_length(args); i++)
		{
			oneArg = json_object_array_get_idx(args, i);
			rc += subscribe_unsubscribe(request, subscribe, oneArg, cContext);
		}
	}
	else
	{
		rc = subscribe_unsubscribe(request, subscribe, args, cContext);
	}

	if(rc >= 0)
		afb_req_success(request, NULL, NULL);
	else
		afb_req_fail(request, "error", NULL);
}

/// @brief entry point for client un-subscription request.
void subscribe(AFB_ReqT request)
{
	clientAppCtx *cContext = reinterpret_cast<clientAppCtx*>(afb_req_context(request, 0, Composer::createContext, Composer::destroyContext, nullptr));

	do_subscribe_unsubscribe(request, true, cContext);
}

/// @brief entry point for client un-subscription request.
void unsubscribe(AFB_ReqT request)
{
	clientAppCtx *cContext = reinterpret_cast<clientAppCtx*>(afb_req_context(request, 0, Composer::createContext, Composer::destroyContext, nullptr));

	do_subscribe_unsubscribe(request, false, cContext);
}

/// @brief verb that loads JSON configuration (old SigComp.json file now)

void addObjects(AFB_ReqT request)
{
	Composer& composer = Composer::instance();
	json_object *sourcesJ = nullptr,
				*signalsJ = nullptr,
				*objectsJ = nullptr;
	const char* filepath = afb_req_value(request, "file");

	if(filepath)
	{
		objectsJ = json_object_from_file(filepath);
		if(! objectsJ)
		{
			const char *has_slash = strrchr(filepath, '/');
			char *filename = has_slash ? strdupa(has_slash + 1) : strdupa(filepath);
			char *filename_end = strrchr(filename, '.');
			if (filename_end)
				{*filename_end = '\0';}

			json_object* responseJ = ScanForConfig(CONTROL_CONFIG_PATH, CTL_SCAN_RECURSIVE, filename, ".json");

			if(responseJ)
			{
				filepath = ConfigSearch(nullptr, responseJ);
				if(filepath)
					{objectsJ = json_object_from_file(filepath);}
			}
			else
			{
				afb_req_fail_f(request, "Fail to find file: %s", filepath);
				return;
			}
		}
	}
	else
		{objectsJ = afb_req_json(request);}

	if(objectsJ)
	{
		json_object_object_get_ex(objectsJ, "sources", &sourcesJ);
		json_object_object_get_ex(objectsJ, "signals", &signalsJ);

		if(sourcesJ && composer.loadSources(sourcesJ))
		{
			afb_req_fail_f(request, "Loading 'sources' configuration or subscription error", "Error code: -4");
			return;
		}
		if(signalsJ)
		{
			if(!composer.loadSignals(signalsJ))
			{
				if(composer.initSignals())
				{
					afb_req_fail_f(request, "Loading 'signals' configuration or subscription error", "Error code: -3");
					return;
				}
			}
			else
			{
				afb_req_fail_f(request, "Loading 'signals' configuration or subscription error", "Error code: -2");
				return;
			}
		}
		afb_req_success(request, NULL, NULL);
	}
	else
		{afb_req_fail_f(request, "No 'file' key found in request argument", "Error code: -1");}
}

/// @brief entry point to list available signals
void list(AFB_ReqT request)
{
	struct json_object *allSignalsJ = json_object_new_array();

	std::vector<std::shared_ptr<Signal>> allSignals = Composer::instance().getAllSignals();
	for(auto& sig: allSignals)
		{json_object_array_add(allSignalsJ, sig->toJSON());}

	if(json_object_array_length(allSignalsJ))
		{afb_req_success(request, allSignalsJ, NULL);}
	else
		{afb_req_fail(request, "error", "No Signals recorded so far");}
}

/// @brief entry point for get requests.
void get(AFB_ReqT request)
{
	int err = 0, i = 0;
	size_t l = 0;
	struct json_object* args = afb_req_json(request), *ans = nullptr,
	*options = nullptr, *error = nullptr, *object = nullptr;
	const char* sig;

	// Process about Raw CAN message on CAN bus directly
	err = wrap_json_unpack(args, "{ss,s?o!}", "signal", &sig,
			"options", &options);
	if(err)
	{
		afb_req_fail(request, "error", "Valid arguments are:{'signal': 'wantedsignal'[, 'options': {['average': nb_seconds,] ['minimum': nb_seconds,] ['maximum': nb_seconds] }]");
		return;
	}

	ans = Composer::instance().getsignalValue(sig, options);

	l = json_object_array_length(ans);
	if(l) {
		while(i < l) {
			object = json_object_array_get_idx(ans, i++);
			if(json_object_object_get_ex(object, "error", &error))
				break;
		}
		if(error)
			afb_req_fail(request, "error", json_object_get_string(error));
		else
			afb_req_success(request, ans, NULL);
	}
	else
		afb_req_fail(request, "error", "No signals found.");

}

int loadConf(AFB_ApiT api)
{
	int err = 0;
	std::string bindingDirPath = GetBindingDirPath();
	std::string rootdir = bindingDirPath + "/etc";

	err = Composer::instance().loadConfig(api, rootdir);

	return err;
}

int execConf(AFB_ApiT api)
{
	Composer& composer = Composer::instance();
	int err = 0;
	CtlConfigExec(api, composer.ctlConfig());

	AFB_DEBUG("Signal Composer Control configuration Done.");

	return err;
}