Update app/intro.py

app/intro.py

@@ -16,6 +16,7 @@ import io
 import logging
 from datetime import datetime
 from typing import Dict, Any, Optional
+from app.m_c_data import SAMPLE_MATERIALS, SAMPLE_FENESTRATIONS, SAMPLE_CONSTRUCTIONS
 
 # Configure logging
 logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
@@ -143,7 +144,7 @@ def display_project_management_section():
                 st.warning("Please enter a project name in the Building Information section before exporting.")
 
 def start_new_project():
-    """Initialize a new project by resetting the project_data in session state."""
+    """Initialize a new project by resetting project-specific data while preserving library data."""
     # Keep a backup of the current project data in case user wants to recover
     if 'project_data_backup' not in st.session_state:
         st.session_state.project_data_backup = {}
@@ -153,6 +154,13 @@ def start_new_project():
         backup_timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
         st.session_state.project_data_backup[backup_timestamp] = st.session_state.project_data.copy()
     
+    # Preserve library data from current session state or initialize with defaults
+    library_data = {
+        "materials": st.session_state.project_data.get("materials", {}).get("library", dict(SAMPLE_MATERIALS)),
+        "fenestrations": st.session_state.project_data.get("fenestrations", {}).get("library", dict(SAMPLE_FENESTRATIONS)),
+        "constructions": st.session_state.project_data.get("constructions", {}).get("library", dict(SAMPLE_CONSTRUCTIONS))
+    }
+    
     # Reset project data to match main.py structure
     st.session_state.project_data = {
         "project_name": "",
@@ -209,15 +217,15 @@ def start_new_project():
             "ground_reflectivity": 0.2
         },
         "materials": {
-            "library": {},
+            "library": library_data["materials"],
             "project": {}
         },
         "fenestrations": {
-            "library": {},
+            "library": library_data["fenestrations"],
             "project": {}
         },
         "constructions": {
-            "library": {},
+            "library": library_data["constructions"],
             "project": {}
         },
         "components": {
@@ -327,7 +335,7 @@ def start_new_project():
         }
     }
     
-    logger.info("New project initialized")
+    logger.info("New project initialized with preserved library data")
 
 def load_project(uploaded_file) -> bool:
     """