From 731ac5c8e6be587589d26011dfac3ca3da253f60 Mon Sep 17 00:00:00 2001
From: Philipp Schafft <lion@lion.leolix.org>
Date: Sun, 4 Oct 2020 15:30:50 +0000
Subject: [PATCH] Feature: Added a basic outline of how converting could happen
 with a first generic mapping format

---
 src/xml2json.c | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/xml2json.h |  4 +++
 2 files changed, 96 insertions(+)

diff --git a/src/xml2json.c b/src/xml2json.c
index 1d9cdbb4..17c120ba 100644
--- a/src/xml2json.c
+++ b/src/xml2json.c
@@ -19,3 +19,95 @@
 
 #include "logging.h"
 #define CATMODULE "xml2json"
+
+static void render_node(json_renderer_t *renderer, xmlDocPtr doc, xmlNodePtr node, xmlNodePtr parent)
+{
+    json_renderer_begin(renderer, JSON_ELEMENT_TYPE_OBJECT);
+
+    json_renderer_write_key(renderer, "type", JSON_RENDERER_FLAGS_NONE);
+    switch (node->type) {
+        case XML_ELEMENT_NODE:
+            json_renderer_write_string(renderer, "element", JSON_RENDERER_FLAGS_NONE);
+            if (node->name) {
+                json_renderer_write_key(renderer, "name", JSON_RENDERER_FLAGS_NONE);
+                json_renderer_write_string(renderer, (const char *)node->name, JSON_RENDERER_FLAGS_NONE);
+            }
+        break;
+        case XML_TEXT_NODE:
+            json_renderer_write_string(renderer, "text", JSON_RENDERER_FLAGS_NONE);
+        break;
+        case XML_COMMENT_NODE:
+            json_renderer_write_string(renderer, "comment", JSON_RENDERER_FLAGS_NONE);
+        break;
+        default:
+            json_renderer_write_null(renderer);
+        break;
+    }
+
+    if (node->content) {
+        json_renderer_write_key(renderer, "text", JSON_RENDERER_FLAGS_NONE);
+        json_renderer_write_string(renderer, (const char *)node->content, JSON_RENDERER_FLAGS_NONE);
+    }
+
+    json_renderer_write_key(renderer, "ns", JSON_RENDERER_FLAGS_NONE);
+    if (node->ns && node->ns->href) {
+        json_renderer_write_string(renderer, (const char *)node->ns->href, JSON_RENDERER_FLAGS_NONE);
+        if (node->ns->prefix) {
+            json_renderer_write_key(renderer, "nsprefix", JSON_RENDERER_FLAGS_NONE);
+            json_renderer_write_string(renderer, (const char *)node->ns->prefix, JSON_RENDERER_FLAGS_NONE);
+        }
+    } else {
+        json_renderer_write_null(renderer);
+    }
+
+    if (node->properties) {
+        xmlAttrPtr cur = node->properties;
+
+        json_renderer_write_key(renderer, "properties", JSON_RENDERER_FLAGS_NONE);
+        json_renderer_begin(renderer, JSON_ELEMENT_TYPE_OBJECT);
+        do {
+            xmlChar *value = xmlNodeListGetString(doc, cur->children, 1);
+            if (value) {
+                json_renderer_write_key(renderer, (const char*)cur->name, JSON_RENDERER_FLAGS_NONE);
+                json_renderer_write_string(renderer, (const char*)value, JSON_RENDERER_FLAGS_NONE);
+                xmlFree(value);
+            }
+        } while ((cur = cur->next));
+        json_renderer_end(renderer);
+    }
+
+    if (node->xmlChildrenNode) {
+        xmlNodePtr cur = node->xmlChildrenNode;
+
+        json_renderer_write_key(renderer, "children", JSON_RENDERER_FLAGS_NONE);
+        json_renderer_begin(renderer, JSON_ELEMENT_TYPE_ARRAY);
+        do {
+            render_node(renderer, doc, cur, node);
+            cur = cur->next;
+        } while (cur);
+        json_renderer_end(renderer);
+    }
+
+    json_renderer_end(renderer);
+}
+
+char * xml2json_render_doc_simple(xmlDocPtr doc)
+{
+    json_renderer_t *renderer;
+    xmlNodePtr xmlroot;
+
+    if (!doc)
+        return NULL;
+
+    renderer = json_renderer_create(JSON_RENDERER_FLAGS_NONE);
+    if (!renderer)
+        return NULL;
+
+    xmlroot = xmlDocGetRootElement(doc);
+    if (!xmlroot)
+        return NULL;
+
+    render_node(renderer, doc, xmlroot, NULL);
+
+    return json_renderer_finish(&renderer);
+}
diff --git a/src/xml2json.h b/src/xml2json.h
index 4a1fee04..c49828b4 100644
--- a/src/xml2json.h
+++ b/src/xml2json.h
@@ -11,4 +11,8 @@
 #ifndef __XML2JSON_H__
 #define __XML2JSON_H__
 
+#include <libxml/tree.h>
+
+char * xml2json_render_doc_simple(xmlDocPtr doc);
+
 #endif