Remove direct access of Neo4j::Driver result data

The undocumented internal data structure of the Neo4j::Driver::Result module may differ between driver versions, between server versions, and between result formats (Bolt/Jolt/JSON). Direct access is possible, but brittle.

At the same time, the REST action URIs are not even supported anymore in Neo4j 4. Therefore, they won't change in future and hard-coding them here is not a problem.

lib/REST/Neo4p/Agent/Neo4j/Driver.pm

@@ -21,6 +21,21 @@ my $WARN_ON_ERROR;
 BEGIN {
 }
 
+my %REST_ACTIONS = (
+  all_relationships            => 'relationships/all',
+  all_typed_relationships      => 'relationships/all/{-list|&|types}',
+  create_relationship          => 'relationships',
+  incoming_relationships       => 'relationships/in',
+  incoming_typed_relationships => 'relationships/in/{-list|&|types}',
+  labels                       => 'labels',
+  outgoing_relationships       => 'relationships/out',
+  outgoing_typed_relationships => 'relationships/out/{-list|&|types}',
+  paged_traverse               => 'paged/traverse/{returnType}{?pageSize,leaseTime}',
+  properties                   => 'properties',
+  property                     => 'properties/{key}',
+  traverse                     => 'traverse/{returnType}',
+);
+
 sub new {
   my ($class, @args) = @_;
   my $self = {
@@ -177,21 +192,7 @@ sub connect {
     last if $f;
   }
   # set actions
-  try {
-    my $tx = $self->session->begin_transaction;
-    my $n = $tx->run('create (n) return n')->single;
-    my $actions = $n->{rest}[0];
-    $tx->rollback;
-    foreach (keys %$actions) {
-      next if /^extensions|metadata|self$/;
-      # strip any trailing slash
-      $actions->{$_} =~ s|/+$||;
-      my ($suffix) = $actions->{$_} =~ m|.*node/[0-9]+/(.*)|;
-      $self->{_actions}{$_} = $suffix;
-    }
-  } catch {
-    REST::Neo4p::LocalException->throw("While determining actions: $_");
-  };
+  $self->{_actions}{$_} = $REST_ACTIONS{$_} for keys %REST_ACTIONS;
   return 1;
 }