create simple mustash sobstitute

obj2html/obj2html.py

@@ -1,8 +1,22 @@
 import os
 import json
+import re
+import copy
 
 TEMPLATE_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'index.html')
 
+def simple_mustache(input_string, value_dict):
+  output_string = copy.deepcopy(input_string)
+  mustache_variables = re.findall(r"{{.*}}",output_string)
+  for v_text in mustache_variables:
+    v_name = v_text[2:-2]
+    if '.' in v_name:
+      dict_name, dict_subname = v_name.split(".")
+      v = value_dict[dict_name][dict_subname]
+    else:
+      v = value_dict[v_name]
+    output_string = output_string.replace(v_text, str(v))
+  return output_string
 
 def obj2html(
   obj_path, output_html_path=None, 
@@ -18,8 +32,13 @@ def obj2html(
 
   with  open(TEMPLATE_PATH, "r") as f:
     html_template = f.read()
-  html_string = html_template.replace("{{obj_3d}}", js_string)
-  html_string = html_string.replace("{{camera.fov}}", str(camera['fov']))
+
+  data_dict = {
+    "obj_3d": js_string,
+    "camera": camera,
+  }
+
+  html_string = simple_mustache(html_template, data_dict)
 
   if output_html_path != None:
     with  open(output_html_path, "w") as f: