summaryrefslogtreecommitdiffstats
path: root/signal-composer-binding/signal-composer-binding.cpp
blob: cc3b9a85a99737943eda03eb4088059ef8ef6f45 (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
/*
 * 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 "signal-composer-binding.hpp"
#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)
{
	AFB_DEBUG("Received event json: %s", json_object_to_json_string(object));
	Composer& composer = Composer::instance();

	std::vector<Signal*> signals = composer.searchSignals(event);
	if(!signals.empty())
	{
		for(auto& sig: signals)
		{
			sig->onReceivedCB(object);
		}
	}
}

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

	cContext->appendSignals(signals);
	if(subscribe)
		{err = cContext->makeSubscription(request);}
	else
		{err = cContext->makeUnsubscription(request);}

	return err;
}

static int subscribe_unsubscribe(struct afb_req request,
	bool subscribe,
	json_object* args,
	clientAppCtx* cContext)
{
	int rc = 0;
	json_object *event = nullptr;
	if (args == NULL || !json_object_object_get_ex(args, "event", &event))
	{
		rc = one_subscribe_unsubscribe(request, subscribe, "*", args, cContext);
	}
	else if (json_object_get_type(event) == json_type_string)
	{
		rc = one_subscribe_unsubscribe(request, subscribe, json_object_get_string(event), args, cContext);
	}
	else if (json_object_get_type(event) == json_type_array)
	{
		for (int i = 0 ; i < json_object_array_length(event) ; i++)
		{
			json_object *x = json_object_array_get_idx(event, 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_req 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_req request)
{
	clientAppCtx *cContext = reinterpret_cast<clientAppCtx*>(afb_req_context_make(request, 0, Composer::createContext, Composer::destroyContext, nullptr));

	do_subscribe_unsubscribe(request, true, cContext);
}

/// @brief entry point for client un-subscription request.
void unsubscribe(afb_req request)
{
	clientAppCtx *cContext = reinterpret_cast<clientAppCtx*>(afb_req_context_make(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 loadConf(afb_req request)
{
	json_object* args = afb_req_json(request), *fileJ;
	const char* filepath;

	wrap_json_unpack(args, "{s:s}", "filepath", &filepath);
	fileJ = json_object_from_file(filepath);

	if(Composer::instance().loadSignals(fileJ))
		{afb_req_fail_f(request, "Loading configuration or subscription error", "Error code: -1");}
	else
	{

		afb_req_success(request, NULL, NULL);
	}
}

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

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

	if(json_object_array_length(allSignalsJ) && !execConf())
	{
		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(struct afb_req request)
{
	int err = 0;
	struct json_object* args = afb_req_json(request), *ans = nullptr,
	*options = nullptr;
	const char* sig;

	// Process about Raw CAN message on CAN bus directly
	err = wrap_json_unpack(args, "{ss,s?o!}", "signals", &sig,
			"options", &options);
	if(err)
	{
		AFB_ERROR("Can't process your request '%s'. Valid arguments are: string for 'signal' and JSON object for 'options' (optionnal)", json_object_to_json_string_ext(args, JSON_C_TO_STRING_PRETTY));
		afb_req_fail(request, "error", NULL);
		return;
	}

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

	if (ans)
		afb_req_success(request, ans, NULL);
	else
		afb_req_fail(request, "error", NULL);
}

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

	Composer& composer = Composer::instance();
	err = composer.loadConfig(rootdir.c_str());

	return err;
}

int execConf()
{
	Composer& composer = Composer::instance();
	int err = 0;
	CtlConfigExec(composer.ctlConfig());
	std::vector<Signal*> allSignals = composer.getAllSignals();
	ssize_t sigCount = allSignals.size();
	for( Signal*& sig: allSignals)
	{
		sig->attachToSourceSignals(composer);
	}

	for(auto& sig: allSignals)
	{
		if( (err += sig->initialRecursionCheck()) )
		{
			AFB_ERROR("There is an infinite recursion loop in your signals definition. Root coming from signal: %s", sig->id().c_str());
			return err;
		}
	}

	composer.execSignalsSubscription();

	AFB_DEBUG("Signal Composer Control configuration Done.\n signals=%d", (int)sigCount);

	return err;
}