feat: Add jid_is_valid_user_jid() to check for valid user JIDs

This one will need a localpart as well.
It should be used when we want to message a user for example.
While jid_is_valid() also returns TRUE for domain/server JIDs.

src/xmpp/jid.c

@@ -152,6 +152,13 @@ jid_is_valid(const gchar* const str)
     return (jid != NULL);
 }
 
+gboolean
+jid_is_valid_user_jid(const gchar* const str)
+{
+    auto_jid Jid* jid = jid_create(str);
+    return (jid != NULL && jid->localpart != NULL);
+}
+
 Jid*
 jid_create_from_bare_and_resource(const gchar* const barejid, const gchar* const resource)
 {

src/xmpp/jid.h

@@ -53,6 +53,7 @@ typedef struct jid_t Jid;
 
 Jid* jid_create(const gchar* const str);
 gboolean jid_is_valid(const gchar* const str);
+gboolean jid_is_valid_user_jid(const gchar* const str);
 Jid* jid_create_from_bare_and_resource(const gchar* const barejid, const gchar* const resource);
 void jid_destroy(Jid* jid);
 void jid_ref(Jid* jid);

tests/unittests/unittests.c

@@ -154,6 +154,9 @@ main(int argc, char* argv[])
         cmocka_unit_test(jid_create__returns__null_from_empty_parts),
         cmocka_unit_test(jid_create__returns__null_from_multiple_at_in_bare),
         cmocka_unit_test(jid_create__returns__correct_parts_with_at_in_resource_only),
+        cmocka_unit_test(jid_is_valid_user_jid__is__true_for_valid_user_jid),
+        cmocka_unit_test(jid_is_valid_user_jid__is__false_for_domain_jid),
+        cmocka_unit_test(jid_is_valid_user_jid__is__false_for_invalid_jid),
         cmocka_unit_test(jid_is_valid__is__true_for_valid_jid),
         cmocka_unit_test(jid_is_valid__is__false_for_invalid_jid),
         cmocka_unit_test(jid_is_valid__is__false_for_null),

tests/unittests/xmpp/test_jid.c

@@ -306,6 +306,29 @@ jid_create__returns__correct_parts_with_at_in_resource_only(void** state)
     jid_destroy(result);
 }
 
+void
+jid_is_valid_user_jid__is__true_for_valid_user_jid(void** state)
+{
+    assert_true(jid_is_valid_user_jid("myuser@mydomain/laptop"));
+    assert_true(jid_is_valid_user_jid("myuser@mydomain"));
+}
+
+void
+jid_is_valid_user_jid__is__false_for_domain_jid(void** state)
+{
+    assert_false(jid_is_valid_user_jid("mydomain/laptop"));
+    assert_false(jid_is_valid_user_jid("mydomain"));
+}
+
+void
+jid_is_valid_user_jid__is__false_for_invalid_jid(void** state)
+{
+    assert_false(jid_is_valid_user_jid("@mydomain"));
+    assert_false(jid_is_valid_user_jid("/laptop"));
+    assert_false(jid_is_valid_user_jid(NULL));
+    assert_false(jid_is_valid_user_jid(""));
+}
+
 void
 jid_is_valid__is__true_for_valid_jid(void** state)
 {

tests/unittests/xmpp/test_jid.h

@@ -30,6 +30,9 @@ void jid_create__returns__null_from_invalid_localpart_chars(void** state);
 void jid_create__returns__null_from_empty_parts(void** state);
 void jid_create__returns__null_from_multiple_at_in_bare(void** state);
 void jid_create__returns__correct_parts_with_at_in_resource_only(void** state);
+void jid_is_valid_user_jid__is__true_for_valid_user_jid(void** state);
+void jid_is_valid_user_jid__is__false_for_domain_jid(void** state);
+void jid_is_valid_user_jid__is__false_for_invalid_jid(void** state);
 void jid_is_valid__is__true_for_valid_jid(void** state);
 void jid_is_valid__is__false_for_invalid_jid(void** state);
 void jid_is_valid__is__false_for_null(void** state);