Fixes for #516:

Added output when message are marked read (if ```--json```), which fixes Issue [#516] (https://github.com/vysheng/tg/issues/516#issuecomment-101710890)
Also added event field to json which will be send to terminal/main_session:
"event" = "message", "read" (message got read), "service", (events only in secret chats?)  "updates" (peer name change etc), "download" (file downloaded)

interface.c

@@ -1870,6 +1870,7 @@ void print_filename_gw (struct tgl_state *TLSR, void *extra, int success, const
     #ifdef USE_JSON
       json_t *res = json_object ();
       assert (json_object_set (res, "result", json_string (name)) >= 0);
+      assert (json_object_set (res, "event", json_string ("download")) >= 0);
       char *s = json_dumps (res, 0);
       mprintf (ev, "%s\n", s);
       json_decref (res);
@@ -2135,6 +2136,15 @@ void print_read_list (int num, struct tgl_message *list[]) {
   int i;
   mprint_start (ev);
   for (i = 0; i < num; i++) if (list[i]) {
+    if (enable_json) {
+      #ifdef USE_JSON
+        json_t *res = json_pack_read (list[i]);
+        char *s = json_dumps (res, 0);
+        mprintf (ev, "%s\n", s);
+        json_decref (res);
+        free (s);
+      #endif
+    }
     tgl_peer_id_t to_id;
     if (tgl_get_peer_type (list[i]->to_id) == TGL_PEER_USER && tgl_get_peer_id (list[i]->to_id) == TLS->our_id) {
       to_id = list[i]->from_id;
@@ -2162,6 +2172,7 @@ void print_read_list (int num, struct tgl_message *list[]) {
     }
 
     assert (c1 + c2 > 0);
+    if (!enable_json)  {
       mpush_color (ev, COLOR_YELLOW);
       switch (tgl_get_peer_type (to_id)) {
       case TGL_PEER_USER:
@@ -2182,6 +2193,7 @@ void print_read_list (int num, struct tgl_message *list[]) {
       mprintf (ev, " marked read %d outbox and %d inbox messages\n", c1, c2);
       mpop_color (ev);
 	}
+  }
   mprint_end (ev);
 }
 
@@ -2374,6 +2386,7 @@ void print_peer_updates (struct in_ev *ev, int flags) {
 void  json_peer_update (struct in_ev *ev, tgl_peer_t *P, unsigned flags) {
   #ifdef USE_JSON
     json_t *res = json_object ();
+    assert (json_object_set (res, "event", json_string ("updates")) >= 0);
     assert (json_object_set (res, "peer", json_pack_peer (P->id, P)) >= 0);
     assert (json_object_set (res, "updates", json_pack_updates (flags)) >= 0);
     char *s = json_dumps (res, 0);

json-tg.c

@@ -3,8 +3,8 @@
 
 #include <jansson.h>
 #include "json-tg.h"
-#include <tgl.h>
-#include <tgl-layout.h>
+#include <tgl/tgl.h>
+#include <tgl/tgl-layout.h>
 #include <assert.h>
 
 #ifndef json_boolean
@@ -331,6 +331,8 @@ json_t *json_pack_service (struct tgl_message *M) {
 
 json_t *json_pack_message (struct tgl_message *M) {  
   json_t *res = json_object ();
+  assert (json_object_set (res, "event", json_string ("message")) >= 0);
+  //will overwriten to service, if service.
 
   assert (json_object_set (res, "id", json_integer (M->id)) >= 0);
   if (!(M->flags & TGLMF_CREATED)) { return res; }
@@ -366,8 +368,17 @@ json_t *json_pack_message (struct tgl_message *M) {
       assert (json_object_set (res, "media", json_pack_media (&M->media)) >= 0);
     }
   } else {
+    assert (json_object_set (res, "event", json_string ("service")) >= 0);
     assert (json_object_set (res, "action", json_pack_service (M)) >= 0);
   }
   return res;
 }
+
+json_t *json_pack_read (struct tgl_message *M) {
+  json_t *res = json_pack_message (M);
+  assert (json_object_set (res, "event", json_string ("read")) >= 0);
+  //this will overwrite "event":"message" to "event":"read".
+  return res;
+}
+
 #endif

json-tg.h

@@ -8,5 +8,6 @@
 json_t *json_pack_message (struct tgl_message *M);
 json_t *json_pack_updates (unsigned flags);
 json_t *json_pack_peer (tgl_peer_id_t id, tgl_peer_t *P);
+json_t *json_pack_read (struct tgl_message *M);
 #endif
 #endif