aboutsummaryrefslogtreecommitdiffstats
path: root/ctl-lib/ctl-lua.c
blob: d5c2975993b381f1ecbdddfc27a4687fee011378 (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
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
/*
 * Copyright (C) 2016 "IoT.bzh"
 * Author Fulup Ar Foll <fulup@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.
 * ref:
 *  (manual) https://www.lua.org/manual/5.3/manual.html
 *  (lua->C) http://www.troubleshooters.com/codecorn/lua/lua_c_calls_lua.htm#_Anatomy_of_a_Lua_Call
 *  (lua/C Var) http://acamara.es/blog/2012/08/passing-variables-from-lua-5-2-to-c-and-vice-versa/
 *  (Lua/C Lib)https://john.nachtimwald.com/2014/07/12/wrapping-a-c-library-in-lua/
 *  (Lua/C Table) https://gist.github.com/SONIC3D/10388137
 *  (Lua/C Nested table) https://stackoverflow.com/questions/45699144/lua-nested-table-from-lua-to-c
 *  (Lua/C Wrapper) https://stackoverflow.com/questions/45699950/lua-passing-handle-to-function-created-with-newlib
 *
 */

#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <sys/time.h>

#include "ctl-config.h"

#define LUA_FIST_ARG 2 // when using luaL_newlib calllback receive libtable as 1st arg
#define LUA_MSG_MAX_LENGTH 512
#define JSON_ERROR (json_object*)-1


extern CtlLua2cFuncT *ctlLua2cFunc;
static  lua_State* luaState;

#ifndef CTX_MAGIC
 static int CTX_MAGIC;
#endif

#ifndef TIMER_MAGIC
 static int TIMER_MAGIC;
#endif

typedef struct {
    char *name;
    int  count;
    AFB_EventT event;
} LuaAfbEvent;

typedef struct {
    int ctxMagic;
    CtlSourceT *source;
} LuaAfbSourceT;

typedef struct {
  const char *callback;
  json_object *context;
  CtlSourceT *source;
} LuaCbHandleT;


/*
 * Note(Fulup): I fail to use luaL_setmetatable and replaced it with a simple opaque
 * handle while waiting for someone smarter than me to find a better solution
 *  https://stackoverflow.com/questions/45596493/lua-using-lua-newuserdata-from-lua-pcall
*/
STATIC CtlSourceT *LuaSourcePop (lua_State *luaState, int index) {
  LuaAfbSourceT *afbSource;
  luaL_checktype(luaState, index, LUA_TLIGHTUSERDATA);
  afbSource = (LuaAfbSourceT *) lua_touserdata(luaState, index);
  if (afbSource == NULL || afbSource->ctxMagic != CTX_MAGIC) {
      luaL_error(luaState, "(Hoops) Invalid source handle");
      return NULL;
  }
  return afbSource->source;
}

STATIC LuaAfbSourceT *LuaSourcePush (lua_State *luaState, CtlSourceT *source) {
  LuaAfbSourceT *afbSource = (LuaAfbSourceT *)calloc(1, sizeof(LuaAfbSourceT));
  if (!afbSource) {
      AFB_ApiError(source->api, "LuaSourcePush fail to allocate user data context");
      return NULL;
  }

  lua_pushlightuserdata(luaState, afbSource);
  afbSource->ctxMagic=CTX_MAGIC;
  afbSource->source= source;
  return afbSource;
}

// Push a json structure on the stack as a LUA table
STATIC int LuaPushArgument (CtlSourceT *source, json_object *argsJ) {

    //AFB_NOTICE("LuaPushArgument argsJ=%s", json_object_get_string(argsJ));

    json_type jtype= json_object_get_type(argsJ);
    switch (jtype) {
        case json_type_object: {
            lua_newtable (luaState);
            json_object_object_foreach (argsJ, key, val) {
                int done = LuaPushArgument (source, val);
                if (done) {
                    lua_setfield(luaState,-2, key);
                }
            }
            break;
        }
        case json_type_array: {
            size_t length= json_object_array_length(argsJ);
            lua_newtable (luaState);
            for (int idx=0; idx < length; idx ++) {
                json_object *val=json_object_array_get_idx(argsJ, idx);
                LuaPushArgument (source, val);
                lua_seti (luaState,-2, idx);
            }
            break;
        }
        case json_type_int:
            lua_pushinteger(luaState, json_object_get_int(argsJ));
            break;
        case json_type_string:
            lua_pushstring(luaState, json_object_get_string(argsJ));
            break;
        case json_type_boolean:
            lua_pushboolean(luaState, json_object_get_boolean(argsJ));
            break;
        case json_type_double:
            lua_pushnumber(luaState, json_object_get_double(argsJ));
            break;
        case json_type_null:
            AFB_ApiWarning(source->api, "LuaPushArgument: NULL object type %s", json_object_get_string(argsJ));
            return 0;
            break;

        default:
            AFB_ApiError(source->api, "LuaPushArgument: unsupported Json object type %s", json_object_get_string(argsJ));
            return 0;
    }
    return 1;
}

STATIC  json_object *LuaPopOneArg (CtlSourceT *source, lua_State* luaState, int idx);

// Move a table from Internal Lua representation to Json one
// Numeric table are transformed in json array, string one in object
// Mix numeric/string key are not supported
STATIC json_object *LuaTableToJson (CtlSourceT *source, lua_State* luaState, int index) {
    #define LUA_KEY_INDEX -2
    #define LUA_VALUE_INDEX -1

    int idx;
    int tableType;
    json_object *tableJ= NULL;

    lua_pushnil(luaState); // 1st key
    if (index < 0) index--;
    for (idx=1; lua_next(luaState, index) != 0; idx++) {

        // uses 'key' (at index -2) and 'value' (at index -1)
        if (lua_type(luaState,LUA_KEY_INDEX) == LUA_TSTRING) {

            if (!tableJ) {
                tableJ= json_object_new_object();
                tableType=LUA_TSTRING;
            } else if (tableType != LUA_TSTRING){
                AFB_ApiError(source->api, "MIX Lua Table with key string/numeric not supported");
                return NULL;
            }

            const char *key= lua_tostring(luaState, LUA_KEY_INDEX);
            json_object *argJ= LuaPopOneArg(source, luaState, LUA_VALUE_INDEX);
            json_object_object_add(tableJ, key, argJ);

        } else {
            if (!tableJ) {
                tableJ= json_object_new_array();
                tableType=LUA_TNUMBER;
            } else if(tableType != LUA_TNUMBER) {
                AFB_ApiError(source->api, "MIX Lua Table with key numeric/string not supported");
                return NULL;
            }

            json_object *argJ= LuaPopOneArg(source, luaState, LUA_VALUE_INDEX);
            json_object_array_add(tableJ, argJ);
        }


        lua_pop(luaState, 1); // removes 'value'; keeps 'key' for next iteration
    }

    // Query is empty free empty json object
    if (idx == 1) {
        json_object_put(tableJ);
        return NULL;
    }
    return tableJ;
}

STATIC  json_object *LuaPopOneArg (CtlSourceT *source, lua_State* luaState, int idx) {
    json_object *value=NULL;

    int luaType = lua_type(luaState, idx);
    switch(luaType)  {
        case LUA_TNUMBER: {
            lua_Number number= lua_tonumber(luaState, idx);;
            int nombre = (int)number; // evil trick to determine wether n fits in an integer. (stolen from ltcl.c)
            if (number == nombre) {
                value= json_object_new_int((int)number);
            } else {
                value= json_object_new_double(number);
            }
            break;
        }
        case LUA_TBOOLEAN:
            value=  json_object_new_boolean(lua_toboolean(luaState, idx));
            break;
        case LUA_TSTRING:
           value=  json_object_new_string(lua_tostring(luaState, idx));
            break;
        case LUA_TTABLE:
            value= LuaTableToJson(source, luaState, idx);
            break;
        case LUA_TNIL:
            value=json_object_new_string("nil") ;
            break;
        case LUA_TUSERDATA:
            value=json_object_new_int64((int64_t)lua_touserdata(luaState, idx)); // store userdata as int !!!
            break;

        default:
            AFB_ApiNotice (source->api, "LuaPopOneArg: script returned Unknown/Unsupported idx=%d type:%d/%s", idx, luaType, lua_typename(luaState, luaType));
            value=NULL;
    }

    return value;
}

static json_object *LuaPopArgs (CtlSourceT *source, lua_State* luaState, int start) {
    json_object *responseJ;

    int stop = lua_gettop(luaState);
    if(stop-start <0) return NULL;

    // start at 2 because we are using a function array lib
    if (start == stop) {
        responseJ=LuaPopOneArg (source, luaState, start);
    } else {
        // loop on remaining return arguments
        responseJ= json_object_new_array();
        for (int idx=start; idx <= stop; idx++) {
            json_object *argJ=LuaPopOneArg (source, luaState, idx);
            if (!argJ) goto OnErrorExit;
            json_object_array_add(responseJ, argJ);
       }
    }

    return responseJ;

  OnErrorExit:
    return NULL;
}



STATIC int LuaFormatMessage(lua_State* luaState, int verbosity, int level) {
    char *message;

    CtlSourceT *source= LuaSourcePop(luaState, LUA_FIST_ARG);
    if (!source) goto OnErrorExit;
\

    // if log level low then silently ignore message
#ifdef AFB_BINDING_PREV3
    if(source->api->verbosity < verbosity) return 0;
#else
    if(afb_get_verbosity() < verbosity) return 0;
#endif

    json_object *responseJ= LuaPopArgs(source, luaState, LUA_FIST_ARG+1);

    if (!responseJ) {
        luaL_error(luaState,"LuaFormatMessage empty message");
        goto OnErrorExit;
    }

    // if we have only on argument just return the value.
    if (json_object_get_type(responseJ)!=json_type_array || json_object_array_length(responseJ) <2) {
        message= (char*)json_object_get_string(responseJ);
        goto PrintMessage;
    }

    // extract format and push all other parameter on the stack
    message = alloca (LUA_MSG_MAX_LENGTH);
    const char *format = json_object_get_string(json_object_array_get_idx(responseJ, 0));

    int arrayIdx=1;
    int uidIdx=0;

    for (int idx=0; format[idx] !='\0'; idx++) {

        if (format[idx]=='%' && format[idx] !='\0') {
            json_object *slotJ= json_object_array_get_idx(responseJ, arrayIdx);
            //if (slotJ) AFB_NOTICE("**** idx=%d slotJ=%s", arrayIdx, json_object_get_string(slotJ));


            switch (format[++idx]) {
                case 'd':
                    if (slotJ) uidIdx += snprintf (&message[uidIdx], LUA_MSG_MAX_LENGTH-uidIdx,"%d", json_object_get_int(slotJ));
                    else  uidIdx += snprintf (&message[uidIdx], LUA_MSG_MAX_LENGTH-uidIdx,"nil");
                    arrayIdx++;
                    break;
                case 'f':
                    if (slotJ) uidIdx += snprintf (&message[uidIdx], LUA_MSG_MAX_LENGTH-uidIdx,"%f", json_object_get_double(slotJ));
                    else  uidIdx += snprintf (&message[uidIdx], LUA_MSG_MAX_LENGTH-uidIdx,"nil");
                    arrayIdx++;
                    break;

                case'%':
                    message[uidIdx]='%';
                    uidIdx++;
                    break;

                case 'A':
                    uidIdx += snprintf (&message[uidIdx], LUA_MSG_MAX_LENGTH-uidIdx,"level: %s", source->uid);
                    break;

                case 's':
                default:
                    if (slotJ) uidIdx += snprintf (&message[uidIdx], LUA_MSG_MAX_LENGTH-uidIdx,"%s", json_object_get_string(slotJ));
                    else  uidIdx += snprintf (&message[uidIdx], LUA_MSG_MAX_LENGTH-uidIdx,"nil");
                    arrayIdx++;
                }

        } else {
            if (uidIdx >= LUA_MSG_MAX_LENGTH) {
                AFB_ApiWarning (source->api, "LuaFormatMessage: message[%s] owerverflow LUA_MSG_MAX_LENGTH=%d", format, LUA_MSG_MAX_LENGTH);
                uidIdx --; // move backward for EOL
                break;
            } else {
                message[uidIdx++] = format[idx];
            }
        }
    }
    message[uidIdx]='\0';

PrintMessage:
    // TBD: __file__ and __line__ should match LUA source code
    AFB_ApiVerbose(source->api, level,__FILE__,__LINE__,source->uid, "%s", message);
    json_object_put(responseJ);
    return 0;  // nothing return to lua

  OnErrorExit: // on argument to return (the error message)
    json_object_put(responseJ);
    return 1;
}


STATIC int LuaPrintInfo(lua_State* luaState) {
    int err=LuaFormatMessage (luaState, AFB_VERBOSITY_LEVEL_INFO, _AFB_SYSLOG_LEVEL_INFO_);
    return err;
}

STATIC int LuaPrintError(lua_State* luaState) {
    int err=LuaFormatMessage (luaState, AFB_VERBOSITY_LEVEL_ERROR,  _AFB_SYSLOG_LEVEL_ERROR_);
    return err; // no value return
}

STATIC int LuaPrintWarning(lua_State* luaState) {
    int err=LuaFormatMessage (luaState, AFB_VERBOSITY_LEVEL_WARNING,  _AFB_SYSLOG_LEVEL_WARNING_);
    return err;
}

STATIC int LuaPrintNotice(lua_State* luaState) {
    int err=LuaFormatMessage (luaState, AFB_VERBOSITY_LEVEL_NOTICE,  _AFB_SYSLOG_LEVEL_NOTICE_);
    return err;
}

STATIC int LuaPrintDebug(lua_State* luaState) {
    int err=LuaFormatMessage (luaState, AFB_VERBOSITY_LEVEL_DEBUG,  _AFB_SYSLOG_LEVEL_DEBUG_);
    return err;
}

STATIC int LuaAfbSuccess(lua_State* luaState) {
    CtlSourceT *source= LuaSourcePop(luaState, LUA_FIST_ARG);
    if (!source) goto OnErrorExit;

    // ignore context argument
    json_object *responseJ= LuaPopArgs(source, luaState, LUA_FIST_ARG+1);
    if (responseJ == JSON_ERROR) return 1;

    AFB_ReqSucess (source->request, responseJ, NULL);

    json_object_put(responseJ);
    return 0;

 OnErrorExit:
        lua_error(luaState);
        return 1;
}

STATIC int LuaAfbFail(lua_State* luaState) {
    CtlSourceT *source= LuaSourcePop(luaState, LUA_FIST_ARG);
    if (!source) goto OnErrorExit;

    json_object *responseJ= LuaPopArgs(source, luaState, LUA_FIST_ARG+1);
    if (responseJ == JSON_ERROR) return 1;

    AFB_ReqFail(source->request, source->uid, json_object_get_string(responseJ));

    json_object_put(responseJ);
    return 0;

 OnErrorExit:
        lua_error(luaState);
        return 1;
}

#ifdef AFB_BINDING_PREV3
STATIC void LuaAfbServiceCB(void *handle, int iserror, struct json_object *responseJ, AFB_ApiT apiHandle) {
#else
STATIC void LuaAfbServiceCB(void *handle, int iserror, struct json_object *responseJ) {
#endif
    LuaCbHandleT *handleCb= (LuaCbHandleT*)handle;
    int count=1;

    lua_getglobal(luaState, handleCb->callback);

    // Push AFB client context on the stack
    if (iserror) handleCb->source->status = CTL_STATUS_ERR;
    else handleCb->source->status = CTL_STATUS_DONE;
    LuaSourcePush(luaState, handleCb->source);

    // push response
    count+= LuaPushArgument(handleCb->source, responseJ);
    if (handleCb->context) count+= LuaPushArgument(handleCb->source, handleCb->context);

    int err=lua_pcall(luaState, count, LUA_MULTRET, 0);
    if (err) {
        AFB_ApiError(apiHandle, "LUA-SERVICE-CB:FAIL response=%s err=%s", json_object_get_string(responseJ), lua_tostring(luaState,-1) );
    }

    free (handleCb->source);
    free (handleCb);
}


STATIC int LuaAfbService(lua_State* luaState) {
    int count = lua_gettop(luaState);

    CtlSourceT *source= LuaSourcePop(luaState, LUA_FIST_ARG);
    if (!source) {
        lua_pushliteral (luaState, "LuaAfbService-Fail Invalid request handle");
        goto OnErrorExit;
    }

    // note: argument start at 2 because of AFB: table
    if (count <6 || !lua_isstring(luaState, 3) || !lua_isstring(luaState, 4) || !lua_isstring(luaState, 6)) {
        lua_pushliteral (luaState, "ERROR: syntax AFB:service(source, api, verb, {[Lua Table]})");
        goto OnErrorExit;
    }

    // get api/verb+query
    const char *api = lua_tostring(luaState,3);
    const char *verb= lua_tostring(luaState,4);
    json_object *queryJ= LuaTableToJson(source, luaState, 5);
    if (queryJ == JSON_ERROR) return 1;

    LuaCbHandleT *handleCb = calloc (1, sizeof(LuaCbHandleT));
    handleCb->callback= lua_tostring(luaState, 6);
    handleCb->context = LuaPopArgs(source, luaState, 7);

    // source need to be duplicate because request return free it
    handleCb->source  = malloc(sizeof(CtlSourceT));
    handleCb->source  = memcpy (handleCb->source, source, sizeof(CtlSourceT));

    AFB_ServiceCall(source->api, api, verb, queryJ, LuaAfbServiceCB, handleCb);

    return 0; // no value return

  OnErrorExit:
        lua_error(luaState);
        return 1;
}

STATIC int LuaAfbServiceSync(lua_State* luaState) {
    int count = lua_gettop(luaState);
    json_object *responseJ;

    CtlSourceT *source= LuaSourcePop(luaState, LUA_FIST_ARG);
    if (!source) {
        lua_pushliteral (luaState, "LuaAfbServiceSync-Fail Invalid request handle");
        goto OnErrorExit;
    }

    // note: argument start at 2 because of AFB: table
    if (count != 5 || !lua_isstring(luaState, LUA_FIST_ARG+1) || !lua_isstring(luaState, LUA_FIST_ARG+2) || !lua_istable(luaState, LUA_FIST_ARG+3)) {
        lua_pushliteral (luaState, "ERROR: syntax AFB:servsync(api, verb, {[Lua Table]})");
        goto OnErrorExit;
    }


    // get source/api/verb+query
    const char *api = lua_tostring(luaState,LUA_FIST_ARG+1);
    const char *verb= lua_tostring(luaState,LUA_FIST_ARG+2);
    json_object *queryJ= LuaTableToJson(source, luaState, LUA_FIST_ARG+3);

    int iserror=AFB_ServiceSync(source->api, api, verb, queryJ, &responseJ);

    // push error status & response
    count=1; lua_pushboolean(luaState, iserror);
    count+= LuaPushArgument(source, responseJ);

    return count; // return count values

  OnErrorExit:
        lua_error(luaState);
        return 1;
}

STATIC int LuaAfbEventPush(lua_State* luaState) {
    LuaAfbEvent *afbevt;

    CtlSourceT *source= LuaSourcePop(luaState, LUA_FIST_ARG);
    if (!source) {
        lua_pushliteral (luaState, "LuaAfbEventSubscribe-Fail Invalid request handle");
        goto OnErrorExit;
    }

    // if no private event handle then use default binding event
    if (!lua_islightuserdata(luaState, LUA_FIST_ARG+1)) {
        lua_pushliteral (luaState, "LuaAfbMakePush-Fail missing event handle");
        goto OnErrorExit;
    }

    afbevt = (LuaAfbEvent*) lua_touserdata(luaState, LUA_FIST_ARG+1);

    if (!AFB_EventIsValid(afbevt->event)) {
        lua_pushliteral (luaState, "LuaAfbMakePush-Fail invalid event");
        goto OnErrorExit;
    }

    json_object *ctlEventJ= LuaTableToJson(source, luaState, LUA_FIST_ARG+2);
    if (!ctlEventJ) {
        lua_pushliteral (luaState, "LuaAfbEventPush-Syntax is AFB:signal ([evtHandle], {lua table})");
        goto OnErrorExit;
    }

    int done = AFB_EventPush(afbevt->event, ctlEventJ);
    if (!done) {
        lua_pushliteral (luaState, "LuaAfbEventPush-Fail No Subscriber to event");
        AFB_ApiError(source->api, "LuaAfbEventPush-Fail name subscriber event=%s count=%d", afbevt->name, afbevt->count);
        goto OnErrorExit;
    }
    afbevt->count++;
    return 0;

OnErrorExit:
        lua_error(luaState);
        return 1;
}

STATIC int LuaAfbEventSubscribe(lua_State* luaState) {
    LuaAfbEvent *afbevt;

    CtlSourceT *source= LuaSourcePop(luaState, LUA_FIST_ARG);
    if (!source) {
        lua_pushliteral (luaState, "LuaAfbEventSubscribe-Fail Invalid request handle");
        goto OnErrorExit;
    }

    // if no private event handle then use default binding event
    if (!lua_islightuserdata(luaState, LUA_FIST_ARG+1)) {
        lua_pushliteral (luaState, "LuaAfbMakePush-Fail missing event handle");
        goto OnErrorExit;
    }

    afbevt = (LuaAfbEvent*) lua_touserdata(luaState, LUA_FIST_ARG+1);

    if (!AFB_EventIsValid(afbevt->event)) {
        lua_pushliteral (luaState, "LuaAfbMakePush-Fail invalid event handle");
        goto OnErrorExit;
    }

    int err = AFB_ReqSubscribe(source->request, afbevt->event);
    if (err) {
        lua_pushliteral (luaState, "LuaAfbEventSubscribe-Fail No Subscriber to event");
        AFB_ApiError(source->api, "LuaAfbEventPush-Fail name subscriber event=%s count=%d", afbevt->name, afbevt->count);
        goto OnErrorExit;
    }
    afbevt->count++;
    return 0;

  OnErrorExit:
        lua_error(luaState);
        return 1;
}

STATIC int LuaAfbEventMake(lua_State* luaState) {
    int count = lua_gettop(luaState);
    LuaAfbEvent *afbevt=calloc(1,sizeof(LuaAfbEvent));

    CtlSourceT *source= LuaSourcePop(luaState, LUA_FIST_ARG);
    if (!source) {
        lua_pushliteral (luaState, "LuaAfbEventMake-Fail Invalid request handle");
        goto OnErrorExit;
    }

    if (count != LUA_FIST_ARG+1 || !lua_isstring(luaState, LUA_FIST_ARG+1)) {
        lua_pushliteral (luaState, "LuaAfbEventMake-Syntax is evtHandle= AFB:event ('myEventName')");
        goto OnErrorExit;
    }

    // event name should be the only argument
    afbevt->name= strdup (lua_tostring(luaState,LUA_FIST_ARG+1));

    // create a new binder event
    afbevt->event = AFB_EventMake(source->api, afbevt->name);
    if (!AFB_EventIsValid(afbevt->event)) {
        AFB_ApiError (source->api,"Fail to CreateEvent evtname=%s",  afbevt->name);
        lua_pushliteral (luaState, "LuaAfbEventMake-Fail to Create Binder event");
        goto OnErrorExit;
    }

    // push event handler as a LUA opaque handle
    lua_pushlightuserdata(luaState, afbevt);
    return 1;

  OnErrorExit:
        lua_error(luaState);
        return 1;
}

STATIC int LuaAfbGetUid (lua_State* luaState) {

    CtlSourceT *source= LuaSourcePop(luaState, LUA_FIST_ARG);
    if (!source) {
        lua_pushliteral (luaState, "LuaAfbEventSubscribe-Fail Invalid request handle");
        goto OnErrorExit;
    }

    // extract and return afbSource from timer handle
    lua_pushstring(luaState, source->uid);

    return 1; // return argument

OnErrorExit:
    return 0;
}

STATIC int LuaAfbGetStatus (lua_State* luaState) {

    CtlSourceT *source= LuaSourcePop(luaState, LUA_FIST_ARG);
    if (!source) {
        lua_pushliteral (luaState, "LuaAfbEventSubscribe-Fail Invalid request handle");
        goto OnErrorExit;
    }

    // extract and return afbSource from timer handle
    lua_pushinteger(luaState, source->status);

    return 1; // return argument

OnErrorExit:
    return 0;
}

// Function call from LUA when lua2c plugin L2C is used
// Rfor: Not using LUA_FIRST_ARG here because we didn't use
// luaL_newlib function, so first args is on stack at first
// position.
PUBLIC int Lua2cWrapper(void* luaHandle, char *funcname, Lua2cFunctionT callback) {
    lua_State* luaState = (lua_State*)luaHandle;
    json_object *responseJ=NULL;

    CtlSourceT *source= LuaSourcePop(luaState, 1);

    json_object *argsJ= LuaPopArgs(source, luaState, 2);
    int err= (*callback) (source, argsJ, &responseJ);

    // push error code and eventual response to LUA
    int count=1;
    lua_pushinteger (luaState, err);
    count += LuaPushArgument (source, responseJ);

    return count;
}

// Call a Lua function from a control action
PUBLIC int LuaCallFunc (CtlSourceT *source, CtlActionT *action, json_object *queryJ) {

    int err, count;

    json_object* argsJ   = action->argsJ;
    const char*  func    = action->exec.lua.funcname;

    // load function (should exist in CONTROL_PATH_LUA)
    lua_getglobal(luaState, func);

    // push source on the stack
    count=1;
    // Push AFB client context on the stack
    LuaAfbSourceT *afbSource= LuaSourcePush(luaState, source);
    if (!afbSource) goto OnErrorExit;

    // push argsJ on the stack
    if (!argsJ) {
        lua_pushnil(luaState); count++;
    } else {
        count+= LuaPushArgument (source, argsJ);
    }

    // push queryJ on the stack
    if (!queryJ) {
        lua_pushnil(luaState);
        count++;
    } else {
        count+= LuaPushArgument (source, queryJ);
    }

    // effectively exec LUA script code
    err=lua_pcall(luaState, count, 1, 0);
    if (err)  {
        AFB_ApiError(source->api, "LuaCallFunc Fail calling %s error=%s", func, lua_tostring(luaState,-1));
        goto OnErrorExit;
    }

    // return LUA script value
    int rc= (int)lua_tointeger(luaState, -1);
    return rc;

  OnErrorExit:
    return -1;
}

PUBLIC int luaLoadScript(const char *luaScriptPath)
{
    int err = luaL_loadfile(luaState, luaScriptPath);
    if (err) {
        AFB_ApiError(source->api, "LUA-DOSCRIPT HOOPs Error in LUA loading scripts=%s err=%s", luaScriptPath, lua_tostring(luaState,-1));
        return err;
    }

    // Script was loaded we need to parse to make it executable
    err = lua_pcall(luaState, 0, 0, 0);
    if (err) {
        AFB_ApiError(source->api, "LUA-DOSCRIPT:FAIL to load %s", luaScriptPath);
        return err;
    }

    return err;
}

STATIC int LuaDoScript(json_object *queryJ, CtlSourceT *source)
{
    const char *uid = NULL, *func = NULL;
    char luaScriptPath[CONTROL_MAXPATH_LEN];
    char *filename, *fullpath;
    int index, err = 0;
    json_object *argsJ=NULL;
    static json_object *luaScriptPathJ = NULL;

    if (!queryJ) {
        return -1;
    }

    err= wrap_json_unpack (queryJ, "{s:s,s?s,s?s,s?o !}",
        "uid", &uid,
        "spath",&luaScriptPathJ,
        "function",&func,
        "args",&argsJ);

    if (err) {
        return -1;
    }

    // search for filename=script in CONTROL_LUA_PATH
    if (!luaScriptPathJ)  {
        strncpy(luaScriptPath,CONTROL_DOSCRIPT_PRE, strlen(CONTROL_DOSCRIPT_PRE)+1);
        strncat(luaScriptPath,"-", strlen("-"));
        strncat(luaScriptPath,uid, strlen(uid));
        luaScriptPathJ= ScanForConfig(luaScriptPath , CTL_SCAN_RECURSIVE, luaScriptPath, ".lua");
    }

    for (index=0; index < json_object_array_length(luaScriptPathJ); index++) {
        json_object *entryJ=json_object_array_get_idx(luaScriptPathJ, index);

        err= wrap_json_unpack (entryJ, "{s:s, s:s !}", "fullpath",  &fullpath,"filename", &filename);
        if (err) {
            AFB_ApiError(source->api, "LUA-DOSCRIPT-SCAN:HOOPs invalid config file path = %s", json_object_get_string(entryJ));
            return -2;
        }

        // Ignoring other found script. Only take the first one.
        if (!index) {
            strncpy (luaScriptPath, fullpath, strlen(fullpath)+1);
            strncat (luaScriptPath, "/", strlen("/"));
            strncat (luaScriptPath, filename, strlen(filename));
        }
    }

    err = luaLoadScript(luaScriptPath);
    if(err)
        return err;

    // if no func name given try to deduct from filename
    if (!func && (func=(char*)GetMidleName(filename))!=NULL) {
        strncpy(luaScriptPath,"_", strlen("_")+1);
        strncat(luaScriptPath,func, strlen(func));
        func=luaScriptPath;
    }
    if (!func) {
        AFB_ApiError(source->api, "LUA-DOSCRIPT:FAIL to deduct funcname from %s", filename);
        return -5;
    }

    // load function (should exist in CONTROL_PATH_LUA
    lua_getglobal(luaState, func);

    // Push AFB client context on the stack
    LuaAfbSourceT *afbSource = LuaSourcePush(luaState, source);
    if (!afbSource)
        return -6;

    return 0;
}

STATIC int LuaDoCall(json_object *queryJ, CtlSourceT *source)
{
    int err = 0;
    int count = 0;
    const char *func;
    json_object *argsJ = NULL;

    if(!queryJ)
        return -1;

    err = wrap_json_unpack(queryJ, "{s:s, s?o !}", "uid", &func, "args", &argsJ);
    if (err)
        return -2;

    // load function (should exist in CONTROL_PATH_LUA
    lua_getglobal(luaState, func);

    // Push AFB client context on the stack
    LuaAfbSourceT *afbSource= LuaSourcePush(luaState, source);
    if (!afbSource)
        return -3;

    // push query on the stack
    if (!argsJ) {
        lua_pushnil(luaState);
        count++;
    } else {
        count+= LuaPushArgument (source, argsJ);
    }

    return count;
}

STATIC int LuaDoString(const char *script, CtlSourceT *source)
{
    int err = 0;

    err = luaL_loadstring(luaState, script);
    if (err)
        return -1;

    // Push AFB client context on the stack
    if(source) {
        LuaAfbSourceT *afbSource= LuaSourcePush(luaState, source);
        if (!afbSource)
            return -2;
    }

    return 0;
}

// Execute LUA code from received API request
STATIC void LuaDoAction (LuaDoActionT action, AFB_ReqT request) {
    int err, count=0;
    CtlSourceT *source = alloca(sizeof(CtlSourceT));
    source->request = request;

    json_object* queryJ = AFB_ReqJson(request);

    switch (action) {

        case LUA_DOSTRING: {
            const char *script = json_object_get_string(queryJ);
            count = LuaDoString(script, source);
            if(count)
                AFB_ApiError(source->api, "DOSTRING goes wrong err=%d, String=%s ", count, script);
            break;
        }

        case LUA_DOCALL: {
            count = LuaDoCall(queryJ, source);
            if(count)
                AFB_ApiError(source->api, "DOCALL goes wrong, error = %d, query=%s", count, json_object_get_string(queryJ));
            break;
        }

        case LUA_DOSCRIPT: {   // Fulup need to fix argument passing
            count = LuaDoScript(queryJ, source);
            if(count)
                AFB_ApiError(source->api, "DOSCRIPT goes wrong error=%d query=%s", count, json_object_get_string(queryJ));
            break;
        }

        default:
            AFB_ApiError(source->api, "LUA-DOSCRIPT-ACTION unknown query=%s", json_object_get_string(queryJ));
            goto OnErrorExit;
    }

    if(count >= 0)
        err=lua_pcall(luaState, count+1, 0, 0);
    if (err) {
        AFB_ApiError(source->api, "LUA-DO-EXEC:FAIL query=%s err=%s", json_object_get_string(queryJ), lua_tostring(luaState,-1));
        goto OnErrorExit;
    }
    return;

 OnErrorExit:
    AFB_ReqFail(request,"LUA:ERROR", lua_tostring(luaState,-1));
    return;
}

PUBLIC void ctlapi_execlua (AFB_ReqT request) {
    LuaDoAction (LUA_DOSTRING, request);
}

PUBLIC void ctlapi_request (AFB_ReqT request) {
    LuaDoAction (LUA_DOCALL, request);
}

PUBLIC void ctlapi_debuglua (AFB_ReqT request) {
    LuaDoAction (LUA_DOSCRIPT, request);
}


STATIC TimerHandleT *LuaTimerPop (lua_State *luaState, int index) {
  TimerHandleT *timerHandle;

  luaL_checktype(luaState, index, LUA_TLIGHTUSERDATA);
  timerHandle = (TimerHandleT *) lua_touserdata(luaState, index);

  if (timerHandle == NULL && timerHandle->magic != TIMER_MAGIC) {
      luaL_error(luaState, "Invalid source handle");
      fprintf(stderr, "LuaSourcePop error retrieving afbSource");
      return NULL;
  }
  return timerHandle;
}

STATIC int LuaTimerClear (lua_State* luaState) {

    // retrieve useful information opaque handle
    TimerHandleT *timerHandle = LuaTimerPop(luaState, LUA_FIST_ARG);
    if (!timerHandle) goto OnErrorExit;

#ifdef AFB_BINDING_PREV3
    // API handle does not exit in API-V2
    LuaCbHandleT *luaCbHandle = (LuaCbHandleT*) timerHandle->context;
#endif
    AFB_ApiNotice (luaCbHandle->source->api,"LuaTimerClear timer=%s", timerHandle->uid);
    TimerEvtStop(timerHandle);

    return 0; //happy end

OnErrorExit:
    return 1;
}
STATIC int LuaTimerGet (lua_State* luaState) {

    // retrieve useful information opaque handle
    TimerHandleT *timerHandle = LuaTimerPop(luaState, LUA_FIST_ARG);
    if (!timerHandle) goto OnErrorExit;
    LuaCbHandleT *luaCbHandle = (LuaCbHandleT*) timerHandle->context;

    // create response as a JSON object
    json_object *responseJ= json_object_new_object();
    json_object_object_add(responseJ,"uid", json_object_new_string(timerHandle->uid));
    json_object_object_add(responseJ,"delay", json_object_new_int(timerHandle->delay));
    json_object_object_add(responseJ,"count", json_object_new_int(timerHandle->count));

    // return JSON object as Lua table
    int count=LuaPushArgument(luaCbHandle->source, responseJ);

    // free json object
    json_object_put(responseJ);

    return count; // return argument

OnErrorExit:
    return 0;
}

// Timer Callback

// Set timer
STATIC int LuaTimerSetCB (TimerHandleT *timer) {
    LuaCbHandleT *LuaCbHandle = (LuaCbHandleT*) timer->context;
    int count;

    // push timer handle and user context on Lua stack
    lua_getglobal(luaState, LuaCbHandle->callback);

    // Push AFB client context on the stack
    count=1;
    LuaAfbSourceT *afbSource= LuaSourcePush(luaState, LuaCbHandle->source);
    if (!afbSource) goto OnErrorExit;

    // Push AFB client context on the stack
    count ++;
    lua_pushlightuserdata(luaState, timer);
    if (!afbSource) goto OnErrorExit;

    // Push user Context
    count+= LuaPushArgument(LuaCbHandle->source, LuaCbHandle->context);

    int err=lua_pcall(luaState, count, LUA_MULTRET, 0);
    if (err) {
        AFB_ApiError (LuaCbHandle->source->api,"LUA-TIMER-CB:FAIL response=%s err=%s", json_object_get_string(LuaCbHandle->context), lua_tostring(luaState,-1));
        goto OnErrorExit;
    }

    // get return parameter
    if (!lua_isboolean(luaState, -1)) {
        return (lua_toboolean(luaState, -1));
    }

    return 0;  // By default we are happy

 OnErrorExit:
    return 1;  // stop timer
}

// Free Timer context handle
STATIC int LuaTimerCtxFree(void *handle) {
    LuaCbHandleT *LuaCbHandle = (LuaCbHandleT*) handle;

    free (LuaCbHandle->source);
    free (LuaCbHandle);

    return 0;
}

STATIC int LuaTimerSet(lua_State* luaState) {
    const char *uid=NULL, *info=NULL;
    int delay=0, count=0;

    // Get source handle
    CtlSourceT *source= LuaSourcePop(luaState, LUA_FIST_ARG);
    if (!source) goto OnErrorExit;

    json_object *timerJ = LuaPopOneArg(source, luaState, LUA_FIST_ARG+1);
    const char *callback = lua_tostring(luaState, LUA_FIST_ARG + 2);
    json_object *contextJ = LuaPopOneArg(source, luaState, LUA_FIST_ARG + 3);

    if (lua_gettop(luaState) != LUA_FIST_ARG+3 || !timerJ || !callback || !contextJ) {
        lua_pushliteral(luaState, "LuaTimerSet: Syntax timerset (source, timerT, 'callback', contextT)");
        goto OnErrorExit;
    }

    int err = wrap_json_unpack(timerJ, "{ss, s?s si, si !}",
        "uid", &uid,
        "info", &info,
        "delay", &delay,
        "count", &count);
    if (err) {

        lua_pushliteral(luaState, "LuaTimerSet: Syntax timerT={uid:xxx delay:ms, count:xx}");
        goto OnErrorExit;
    }

    // Allocate handle to store context and callback
    LuaCbHandleT *handleCb = calloc (1, sizeof(LuaCbHandleT));
    handleCb->callback= callback;
    handleCb->context = contextJ;
    handleCb->source  = malloc(sizeof(CtlSourceT));
    memcpy (handleCb->source, source, sizeof(CtlSourceT));  // Fulup need to be free when timer is done

    // everything look fine create timer structure
    TimerHandleT *timerHandle = malloc (sizeof (TimerHandleT));
    timerHandle->magic= TIMER_MAGIC;
    timerHandle->delay=delay;
    timerHandle->count=count;
    timerHandle->uid=uid;
    timerHandle->freeCB=LuaTimerCtxFree;

    // fire timer
    TimerEvtStart (source->api, timerHandle, LuaTimerSetCB, handleCb);

    // Fulup finir les timers avec handle

    // return empty error code plus timer handle
    lua_pushnil(luaState);
    lua_pushlightuserdata(luaState, timerHandle);
    return 2;

OnErrorExit:
    lua_error(luaState);
    return 1; // return error code
}

typedef struct {
    const char *callback;
    json_object *clientCtxJ;
    CtlSourceT *source;
} LuaClientCtxT;


STATIC void *LuaClientCtxNew (void * handle) {

    LuaClientCtxT *clientCtx = (LuaClientCtxT*) handle;
    int count=1;

    // push callback and client context on Lua stack
    lua_getglobal(luaState, clientCtx->callback);

    // let's Lua script know about new/free
    clientCtx->source->status = CTL_STATUS_DONE;

    // Push AFB client context on the stack
    LuaAfbSourceT *afbSource= LuaSourcePush(luaState, clientCtx->source);
    if (!afbSource) goto OnErrorExit;

    // Push user Context
    count+= LuaPushArgument(clientCtx->source, clientCtx->clientCtxJ);

    int err=lua_pcall(luaState, count, 1, 0);
    if (err) {
        AFB_ApiError (clientCtx->source->api,"LuaClientCtxNew:FAIL response=%s err=%s", json_object_get_string(clientCtx->clientCtxJ), lua_tostring(luaState,-1));
        goto OnErrorExit;
    }

    // If function return an error status then free client context
    if (lua_tointeger(luaState, -1)) {
        free (clientCtx);
        goto OnErrorExit;
    }

    return handle;  // By default we are happy

OnErrorExit:
    return NULL;

}

STATIC void LuaClientCtxFree (void * handle) {

    LuaClientCtxT *clientCtx = (LuaClientCtxT*) handle;
    int count=1;

    if (!handle) return;

    // let's Lua script know about new/free
    lua_getglobal(luaState, clientCtx->callback);

    // set source status to notify lua script about free
    clientCtx->source->status = CTL_STATUS_FREE;

    // Push AFB client context on the stack
    LuaAfbSourceT *afbSource= LuaSourcePush(luaState, clientCtx->source);
    if (!afbSource) goto OnErrorExit;

    // Push user Context
    count+= LuaPushArgument(clientCtx->source, clientCtx->clientCtxJ);

    int err=lua_pcall(luaState, count, LUA_MULTRET, 0);
    if (err) {
        AFB_ApiError (clientCtx->source->api,"LuaClientCtxFree:FAIL response=%s err=%s", json_object_get_string(clientCtx->clientCtxJ), lua_tostring(luaState,-1));
        goto OnErrorExit;
    }

    // If function return an error status then free client context
    if (lua_toboolean(luaState, -1)) {
        free (clientCtx);
        goto OnErrorExit;
    }

    return;  // No return status

OnErrorExit:
    return;

}

// set a context that will be free when WS is closed
STATIC int LuaClientCtx(lua_State* luaState) {

    // Get source handle
    CtlSourceT *source= LuaSourcePop(luaState, LUA_FIST_ARG);
    if (!source) goto OnErrorExit;

    if (!AFB_ReqIsValid (source->request)) {
        lua_pushliteral(luaState, "LuaSessionSet-Syntax should be called within client request context");
        goto OnErrorExit;
    }

    // in only one arg then we should free the clientCtx
    if (lua_gettop(luaState) == LUA_FIST_ARG) {
        AFB_ClientCtxClear(source->request);
        goto OnSuccessExit;
    }

    const char *callback = lua_tostring(luaState, LUA_FIST_ARG + 1);
    json_object *clientCtxJ = LuaPopOneArg(source, luaState, LUA_FIST_ARG + 2);

    if (lua_gettop(luaState) != LUA_FIST_ARG+2 || !clientCtxJ || !callback) {
        lua_pushliteral(luaState, "LuaClientCtx-Syntax clientCtx (source, callback, clientCtx)");
        goto OnErrorExit;
    }

    // Allocate handle to store clientCtx and callback
    LuaClientCtxT *clientCtx = calloc (1, sizeof(LuaCbHandleT));
    clientCtx->callback = callback;
    clientCtx->clientCtxJ= clientCtxJ;
    clientCtx->source  = malloc(sizeof(CtlSourceT));
    memcpy (clientCtx->source, source, sizeof(CtlSourceT));  // source if free when command return

    // push client context within session
    void *done = AFB_ClientCtxSet (source->request, 1, LuaClientCtxNew, LuaClientCtxFree, clientCtx);
    if (!done) {
        lua_pushliteral(luaState, "LuaClientCtx-Fail to allocate client context)");
        goto OnErrorExit;
    }

OnSuccessExit:
    lua_pushnil(luaState);
    return 1;

OnErrorExit:
    lua_error(luaState);
    return 1; // return error code
}


// Register a new L2c list of LUA user plugin commands
PUBLIC void LuaL2cNewLib(luaL_Reg *l2cFunc, int count) {
    // luaL_newlib(luaState, l2cFunc); macro does not work with pointer :(
    luaL_checkversion(luaState);
    lua_createtable(luaState, 0, count+1);
    luaL_setfuncs(luaState,l2cFunc,0);
    lua_setglobal(luaState, "L2C");
}

static const luaL_Reg afbFunction[] = {
    {"timerclear", LuaTimerClear},
    {"timerget"  , LuaTimerGet},
    {"timerset"  , LuaTimerSet},
    {"notice"    , LuaPrintNotice},
    {"info"      , LuaPrintInfo},
    {"warning"   , LuaPrintWarning},
    {"debug"     , LuaPrintDebug},
    {"error"     , LuaPrintError},
    {"servsync"  , LuaAfbServiceSync},
    {"service"   , LuaAfbService},
    {"success"   , LuaAfbSuccess},
    {"fail"      , LuaAfbFail},
    {"subscribe" , LuaAfbEventSubscribe},
    {"evtmake"   , LuaAfbEventMake},
    {"evtpush"   , LuaAfbEventPush},
    {"getuid"    , LuaAfbGetUid},
    {"status"    , LuaAfbGetStatus},
    {"context"   , LuaClientCtx},

    {NULL, NULL}  /* sentinel */
};

// Load Lua Interpreter
PUBLIC int LuaConfigLoad (AFB_ApiT apiHandle) {
    static int luaLoaded=0, err = 0;
    //int err = 0;

    // Lua loads only once
    if (luaLoaded) return 0;
    luaLoaded=1;

    // open a new LUA interpretor
    luaState = luaL_newstate();
    if (!luaState)  {
        AFB_ApiError(apiHandle, "LUA_INIT: Fail to open lua interpretor");
        goto OnErrorExit;
    }

    // load auxiliary libraries
    luaL_openlibs(luaState);

    // redirect print to AFB_NOTICE
    luaL_newlib(luaState, afbFunction);
    lua_setglobal(luaState, "AFB");

    // initialise static magic for context
    #ifndef CTX_MAGIC
        CTX_MAGIC=CtlConfigMagicNew();
    #endif

    #ifndef TIMER_MAGIC
        TIMER_MAGIC=CtlConfigMagicNew();
    #endif

    // Load LUA utils functions.
    err = LuaDoString(lua_utils, NULL);
    if(err) {
        AFB_ApiError(apiHandle, "Error loading lua_utils default functions.%s, %d", lua_utils, err);
        return -1;
    }

    return 0;

 OnErrorExit:
    free(luaState);
    return 1;
}

// Create Binding Event at Init Exec Time
PUBLIC int LuaConfigExec (AFB_ApiT apiHandle, const char* prefix) {

    int err, index;

    // create L2C mapping before any LUA script is loaded
    if (ctlLua2cFunc && ctlLua2cFunc->l2cCount) {
        LuaL2cNewLib (ctlLua2cFunc->l2cFunc, ctlLua2cFunc->l2cCount);
    }

    // search for default policy config files
    char fullprefix[CONTROL_MAXPATH_LEN] = "";
    if(prefix)
        strncpy (fullprefix, prefix, strlen(prefix)+1);
    else
        strncat (fullprefix, GetBinderName(), strlen(GetBinderName()));

    strncat (fullprefix, "-", strlen("-"));

    const char *dirList= getenv("CONTROL_LUA_PATH");
    //if (!dirList) dirList=CONTROL_LUA_PATH;

    // special case for no lua even when avaliable
    if (!strcasecmp ("/dev/null", dirList)) {
        return 0;
    }

    json_object *luaScriptPathJ = ScanForConfig(dirList , CTL_SCAN_RECURSIVE, fullprefix, "lua");

    // load+exec any file found in LUA search path
    if(luaScriptPathJ) {
        for (index=0; index < json_object_array_length(luaScriptPathJ); index++) {
            json_object *entryJ=json_object_array_get_idx(luaScriptPathJ, index);

            char *filename; char*fullpath;
            err= wrap_json_unpack (entryJ, "{s:s, s:s !}", "fullpath",  &fullpath,"filename", &filename);
            if (err) {
                AFB_ApiError(apiHandle, "LUA-INIT HOOPs invalid config file path = %s", json_object_get_string(entryJ));
                goto OnErrorExit;
            }

            char filepath[CONTROL_MAXPATH_LEN];
            strncpy(filepath, fullpath, strlen(fullpath)+1);
            strncat(filepath, "/", strlen("/"));
            strncat(filepath, filename, strlen(filename));
            err= luaL_loadfile(luaState, filepath);
            if (err) {
                AFB_ApiError(apiHandle, "LUA-LOAD HOOPs Error in LUA loading scripts=%s err=%s", filepath, lua_tostring(luaState,-1));
                goto OnErrorExit;
            }

            // exec/compil script
            err = lua_pcall(luaState, 0, 0, 0);
            if (err) {
                AFB_ApiError(apiHandle, "LUA-LOAD HOOPs Error in LUA exec scripts=%s err=%s", filepath, lua_tostring(luaState,-1));
                goto OnErrorExit;
            } else {
                AFB_ApiNotice(apiHandle, "LUA-LOAD '%s'", filepath);
            }
        }

        json_object_put(luaScriptPathJ);
        // no policy config found remove control API from binder
        if (index == 0)  {
            AFB_ApiWarning (apiHandle, "POLICY-INIT:WARNING (setenv CONTROL_LUA_PATH) No LUA '%s*.lua' in '%s'", fullprefix, dirList);
        }
    }
    else AFB_ApiWarning (apiHandle, "POLICY-INIT:WARNING (setenv CONTROL_LUA_PATH) No LUA '%s*.lua' in '%s'", fullprefix, dirList);

    AFB_ApiDebug (apiHandle, "Control: LUA Init Done");
    return 0;

 OnErrorExit:
    return 1;
}