Implement net_meta info for nodes

This fixes #6.

src/dijkstragraph.c

@@ -12,6 +12,7 @@ int dijkstra_node_same (struct dijkstra_node *node_a,
 	int same = 1;
 
 	// Not the proper way to do it, but it works for now.
+	same &= (node_a->net_meta == node_b->net_meta);
 	same &= (fabs(node_a->position.x - node_b->position.x) < FP_THRESHOLD);
 	same &= (fabs(node_a->position.y - node_b->position.y) < FP_THRESHOLD);
 	same &= (node_a->position.z == node_b->position.z);
@@ -28,7 +29,8 @@ int dijkstra_node_same (struct dijkstra_node *node_a,
 struct dijkstra_node *dijkstra_node_new(float x,
 					float y,
 					int z,
-					int uid)
+					int uid,
+					struct dijkstra_net_meta *net_meta)
 {
 	struct dijkstra_node *node;
 
@@ -38,6 +40,7 @@ struct dijkstra_node *dijkstra_node_new(float x,
 		node->position.y = y;
 		node->position.z = z;
 		node->uid = uid;
+		node->net_meta = net_meta;
 		node->paths = NULL;
 	}
 
@@ -71,7 +74,8 @@ struct dijkstra_node *dijkstra_node_exists(GList *list,
 struct dijkstra_node *dijkstra_node_new_to_list(GList **list,
 						float x,
 						float y,
-						int z)
+						int z,
+						struct dijkstra_net_meta *net_meta)
 {
 	struct dijkstra_node *node;
 	struct dijkstra_node *found;
@@ -79,7 +83,7 @@ struct dijkstra_node *dijkstra_node_new_to_list(GList **list,
 
 	uid = g_list_length(*list);
 
-	node = dijkstra_node_new(x, y, z, uid);
+	node = dijkstra_node_new(x, y, z, uid, net_meta);
 	if (!node)
 		return NULL;
 
@@ -320,6 +324,9 @@ int dijkstra_path_intersect(struct dijkstra_solver *solver,
 			return 0; // Never intersect trainlines (apart from with access types)
 	}
 
+	if (!target_path)
+		target_path = path_b; // Needed for net_meta selection below
+
 	// Check height
 	p0_z = path_a->source->position.z;
 	p1_z = path_a->destination->position.z;
@@ -356,7 +363,7 @@ int dijkstra_path_intersect(struct dijkstra_solver *solver,
 		i_y = p0_y + (t * s1_y);
 		i_z = p0_z; // They must all on the same height when intersecting, so we can pick whichever.
 
-		node_new = dijkstra_node_new_to_list(&solver->nodes, i_x, i_y, i_z);
+		node_new = dijkstra_node_new_to_list(&solver->nodes, i_x, i_y, i_z, target_path->source->net_meta);
 		if (node_new != path_a->source && node_new != path_a->destination) {
 			path_new = dijkstra_path_dup_shallow(path_a);
 			solver->paths = g_list_append(solver->paths, (gpointer) path_new);
@@ -437,8 +444,8 @@ struct dijkstra_path *dijkstra_path_new_to_list(struct dijkstra_solver *solver,
 	GList *l_last;
 	struct dijkstra_path *path_last = NULL;
 
-	n1 = dijkstra_node_new_to_list(&solver->nodes, x1, y1, z1);
-	n2 = dijkstra_node_new_to_list(&solver->nodes, x2, y2, z2);
+	n1 = dijkstra_node_new_to_list(&solver->nodes, x1, y1, z1, net_meta);
+	n2 = dijkstra_node_new_to_list(&solver->nodes, x2, y2, z2, net_meta);
 	path = dijkstra_path_new(name, n1, n2, weight, net_meta);
 
 	l_last = g_list_last(solver->paths);

src/dijkstragraph.h

@@ -39,6 +39,7 @@ struct dijkstra_path {
 
 struct dijkstra_node {
 	struct position position;
+	struct dijkstra_net_meta *net_meta;
 
 	GList *paths;
 
@@ -77,6 +78,7 @@ struct dijkstra_net_meta *dijkstra_net_meta_new_to_list(struct dijkstra_solver *
 struct dijkstra_node *dijkstra_node_new_to_list(GList **list,
 						float x,
 						float y,
-						int z);
+						int z,
+						struct dijkstra_net_meta *net_meta);
 
 #endif // DIJKSTRAGRAPH_H

src/geojson.c

@@ -63,6 +63,7 @@ int add_geojson_to_dijkstra(struct dijkstra_solver *solver,
 	arr = json_node_get_array(root);
 	if (arr) {
 		i_max = json_array_get_length(arr);
+		net_meta = NULL;
 		for (i = 0; i < i_max; i++)
 		{
 			node = json_array_get_element(arr, i);
@@ -79,7 +80,12 @@ int add_geojson_to_dijkstra(struct dijkstra_solver *solver,
 				json_reader_end_member(reader); // name
 				json_reader_end_member(reader); // properties
 
-				if (net_type == ACCESS) {
+				switch (net_type) {
+				case STREET:
+					if (!net_meta)
+						net_meta = dijkstra_net_meta_new_to_list(solver, net_type, NULL, NULL);
+					break;
+				case ACCESS:
 					access = name;
 					name = strchr(name, ':');
 					if (name == NULL) {
@@ -93,12 +99,15 @@ int add_geojson_to_dijkstra(struct dijkstra_solver *solver,
 					do
 						name++;
 					while (*name == ' ' && *name != '\0');
+					G_GNUC_FALLTHROUGH;
+				case TRAINLINE:
+					net_meta = dijkstra_net_meta_new_to_list(solver, net_type, name, access);
+					break;
 				}
 
 				json_reader_read_member(reader, "geometry");
 				json_reader_read_member(reader, "coordinates");
 				z_last = 0; // By default, let's assume height 0
-				net_meta = dijkstra_net_meta_new_to_list(solver, net_type, name, access);
 				if (json_reader_is_array(reader)) {
 					j_max = json_reader_count_elements(reader);
 					for (j = 0; j < j_max; j++) {