feat: add html.element lua helper

2 files changed, 45 insertions, 0 deletions

diff --git a/src/Dom/Dom.c b/src/Dom/Dom.c
index ede7ddd..6dc6760 100644
--- a/src/Dom/Dom.c
+++ b/src/Dom/Dom.c
@@ -6,6 +6,50 @@
 #include <string.h>
 #include <strings.h>
 
+static int html_element(lua_State *lua) {
+  const char *tag;
+
+  luaL_checktype(lua, 1, LUA_TSTRING);
+  tag = lua_tostring(lua, 1);
+  if (tag[0] == '\0') {
+    return luaL_argerror(lua, 1, "tag cannot be empty");
+  }
+  if (!lua_isnoneornil(lua, 2)) {
+    luaL_checktype(lua, 2, LUA_TTABLE);
+  }
+  if (!lua_isnoneornil(lua, 3)) {
+    luaL_checktype(lua, 3, LUA_TTABLE);
+  }
+
+  lua_newtable(lua);
+
+  lua_pushvalue(lua, 1);
+  lua_setfield(lua, -2, "tag");
+
+  if (lua_istable(lua, 2)) {
+    lua_pushvalue(lua, 2);
+  } else {
+    lua_newtable(lua);
+  }
+  lua_setfield(lua, -2, "attributes");
+
+  if (lua_istable(lua, 3)) {
+    lua_pushvalue(lua, 3);
+  } else {
+    lua_newtable(lua);
+  }
+  lua_setfield(lua, -2, "children");
+
+  return 1;
+}
+
+void dom_register_html(lua_State *lua) {
+  lua_newtable(lua);
+  lua_pushcfunction(lua, html_element);
+  lua_setfield(lua, -2, "element");
+  lua_setglobal(lua, "html");
+}
+
 static int absolute_index(lua_State *lua, int index) {
   return index < 0 ? lua_gettop(lua) + index + 1 : index;
 }
diff --git a/src/Dom/Dom.h b/src/Dom/Dom.h
index 06bd1ff..bee6cd1 100644
--- a/src/Dom/Dom.h
+++ b/src/Dom/Dom.h
@@ -6,5 +6,6 @@
 
 void dom_push_page(lua_State *lua, const xmlNode *root);
 xmlNodePtr dom_page_from_lua(lua_State *lua, int table_index);
+void dom_register_html(lua_State *lua);
 
 #endif