From f52edaf6fb55b01cd73e6691d368d18d6402dff1 Mon Sep 17 00:00:00 2001
From: Andrea Zagli <azagli@libero.it>
Date: Mon, 14 Mar 2016 17:42:45 +0100
Subject: [PATCH] Started new instance.

---
 src/instance.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++--
 src/instance.h |  5 +++--
 src/model.c    | 35 +++++++++++++++++++++++++++++---
 src/model.h    |  1 -
 4 files changed, 88 insertions(+), 8 deletions(-)

diff --git a/src/instance.c b/src/instance.c
index 830f3e6..a062a42 100644
--- a/src/instance.c
+++ b/src/instance.c
@@ -25,6 +25,7 @@
 
 #include <libxml/xpath.h>
 
+#include "commons.h"
 #include "instance.h"
 
 #ifdef G_OS_WIN32
@@ -48,7 +49,9 @@ static void zak_gflow_instance_finalize (GObject *gobject);
 
 typedef struct
 	{
-		gpointer none;
+		xmlXPathContext *xpcontext;
+		GHashTable *ht_nodes;
+		GNode *nodes_history;
 	} ZakGFlowInstancePrivate;
 
 G_DEFINE_TYPE_WITH_PRIVATE (ZakGFlowInstance, zak_gflow_instance, G_TYPE_OBJECT)
@@ -69,19 +72,67 @@ zak_gflow_instance_init (ZakGFlowInstance *zak_gflow_instance)
 {
 	ZakGFlowInstancePrivate *priv = zak_gflow_instance_get_instance_private (zak_gflow_instance);
 
+	priv->nodes_history = g_node_new (NULL);
 }
 
 /*+
  * zak_gflow_instance_new:
+ * @ht_nodes:
+ * @node_id:
  *
  */
 ZakGFlowInstance
-*zak_gflow_instance_new (void)
+*zak_gflow_instance_new (xmlXPathContext *xpcontext, GHashTable *ht_nodes, const gchar *node_id)
 {
 	ZakGFlowInstance *instance;
+	ZakGFlowInstancePrivate *priv;
+
+	xmlNode *cur;
+	GNode *cur_node;
+
+	xmlNodeSet *xnodeset;
+
+	g_return_val_if_fail (xpcontext != NULL, NULL);
+	g_return_val_if_fail (ht_nodes != NULL, NULL);
+	g_return_val_if_fail (node_id != NULL, NULL);
 
 	instance = ZAK_GFLOW_INSTANCE (g_object_new (zak_gflow_instance_get_type (), NULL));
 
+	priv = zak_gflow_instance_get_instance_private (instance);
+
+	priv->xpcontext = xpcontext;
+	priv->ht_nodes = g_hash_table_ref (ht_nodes);
+
+	cur = g_hash_table_lookup (priv->ht_nodes, node_id);
+	if (cur == NULL)
+		{
+			g_warning ("No first/start node found/setted.");
+		}
+	else
+		{
+			cur_node = g_node_insert_data (priv->nodes_history, -1, cur);
+			if (xmlStrcmp (cur->name, (const xmlChar *)"startEvent") == 0)
+				{
+					g_message ("%s: %s", cur->name, (gchar *)xmlGetProp (cur, (const xmlChar *)"name"));
+
+					xnodeset = zak_gflow_commons_xml_search (priv->xpcontext, cur, (const xmlChar *)"child::bpmn:outgoing");
+					if (xnodeset != NULL
+						&& xnodeset->nodeNr > 0)
+						{
+							cur = g_hash_table_lookup (priv->ht_nodes, xmlNodeGetContent (xnodeset->nodeTab[0]));
+							if (cur != NULL)
+								{
+									cur_node = g_node_insert_data (cur_node, -1, cur);
+									g_message ("\tnext: %s %s", cur->name, (gchar *)xmlGetProp (cur, (const xmlChar *)"id"));
+								}
+							else
+								{
+									g_message ("\tnext: no next found");
+								}
+						}
+				}
+		}
+
 	return instance;
 }
 
diff --git a/src/instance.h b/src/instance.h
index 3896fa9..d82f0e5 100644
--- a/src/instance.h
+++ b/src/instance.h
@@ -21,8 +21,9 @@
 
 
 #include <glib-object.h>
+#include <glib.h>
 
-#include <libxml/tree.h>
+#include <libxml/xpath.h>
 
 
 G_BEGIN_DECLS
@@ -37,7 +38,7 @@ struct _ZakGFlowInstanceClass
 };
 
 
-ZakGFlowInstance *zak_gflow_instance_new (void);
+ZakGFlowInstance *zak_gflow_instance_new (xmlXPathContext *xpcontext, GHashTable *ht_nodes, const gchar *node_id);
 
 
 G_END_DECLS
diff --git a/src/model.c b/src/model.c
index 06f497f..02b360d 100644
--- a/src/model.c
+++ b/src/model.c
@@ -22,6 +22,7 @@
 
 #include <glib/gi18n-lib.h>
 #include <gmodule.h>
+#include <glib.h>
 
 #include <libxml/xpath.h>
 #include <libxml/xpathInternals.h>
@@ -266,6 +267,10 @@ ZakGFlowInstance
 
 	gchar *expr;
 
+	GHashTable *ht_nodes;
+
+	xmlNode *cur;
+
 	instance = NULL;
 
 	priv = zak_gflow_model_get_instance_private (model);
@@ -276,15 +281,39 @@ ZakGFlowInstance
 	if (xnodeset != NULL
 		&& xnodeset->nodeNr > 0)
 		{
-			instance = zak_gflow_instance_new ();
+			/* creation of an hash table with all nodes */
+			ht_nodes = g_hash_table_new (g_str_hash, g_str_equal);
+
+			cur = xnodeset->nodeTab[0]->children;
+			while (cur != NULL)
+				{
+					xmlChar *prop;
+
+					prop = xmlGetProp (cur, (const xmlChar *)"id");
+					if (prop != NULL)
+						{
+							g_hash_table_insert (ht_nodes, (gpointer)g_strdup ((gchar *)prop), (gpointer)cur);
+							xmlFree (prop);
+						}
+
+					cur = cur->next;
+				}
+
+			/* find start node */
+			xnodeset = zak_gflow_commons_xml_search (priv->xpcontext, xnodeset->nodeTab[0], (const xmlChar *)"child::bpmn:startEvent");
+			if (xnodeset != NULL
+				&& xnodeset->nodeNr > 0)
+				{
+					instance = zak_gflow_instance_new (priv->xpcontext, ht_nodes, (const gchar *)xmlGetProp (xnodeset->nodeTab[0], (const xmlChar *)"id"));
+				}
+
+			g_hash_table_unref (ht_nodes);
 		}
 	else
 		{
 			g_warning ("No process with id <%s>.", model_id);
 		}
 
-	g_free (expr);
-
 	return instance;
 }
 
diff --git a/src/model.h b/src/model.h
index a3c7af1..7f62f3c 100644
--- a/src/model.h
+++ b/src/model.h
@@ -24,7 +24,6 @@
 
 #include <libxml/tree.h>
 
-
 #include "instance.h"
 
 
-- 
2.49.0