Added mastoapi unfollow.

data.c

@@ -1125,7 +1125,7 @@ int following_check(snac *snac, const char *actor)
 }
 
 
-int following_get(snac *snac, char *actor, d_char **data)
+int following_get(snac *snac, const char *actor, d_char **data)
 /* returns the 'Follow' object */
 {
     xs *fn = _following_fn(snac, actor);

mastoapi.c

@@ -1644,6 +1644,22 @@ int mastoapi_post_handler(const xs_dict *req, const char *q_path,
                 }
                 else
                 if (strcmp(opt, "unfollow") == 0) {
+                    if (valid_status(object_get_by_md5(md5, &actor_o))) {
+                        const char *actor = xs_dict_get(actor_o, "id");
+
+                        /* get the following object */
+                        xs *object = NULL;
+
+                        if (valid_status(following_get(&snac, actor, &object))) {
+                            xs *msg = msg_undo(&snac, xs_dict_get(object, "object"));
+
+                            following_del(&snac, actor);
+
+                            enqueue_output_by_actor(&snac, msg, actor, 0);
+
+                            rsp = mastoapi_relationship(&snac, md5);
+                        }
+                    }
                 }
             }
 

snac.h

@@ -115,7 +115,7 @@ d_char *local_list(snac *snac, int max);
 int following_add(snac *snac, const char *actor, const xs_dict *msg);
 int following_del(snac *snac, char *actor);
 int following_check(snac *snac, const char *actor);
-int following_get(snac *snac, char *actor, d_char **data);
+int following_get(snac *snac, const char *actor, d_char **data);
 d_char *following_list(snac *snac);
 
 void mute(snac *snac, const char *actor);