Collection management (#520)

* Tech spec

* Refactored Cassanda knowledge graph for single table

* Collection management, librarian services to manage metadata and collection deletion

trustgraph-cli/trustgraph/cli/delete_collection.py

@@ -0,0 +1,72 @@
+"""
+Delete a collection and all its data
+"""
+
+import argparse
+import os
+from trustgraph.api import Api
+
+default_url = os.getenv("TRUSTGRAPH_URL", 'http://localhost:8088/')
+default_user = "trustgraph"
+
+def delete_collection(url, user, collection, confirm):
+
+    if not confirm:
+        response = input(f"Are you sure you want to delete collection '{collection}' and all its data? (y/N): ")
+        if response.lower() not in ['y', 'yes']:
+            print("Operation cancelled.")
+            return
+
+    api = Api(url).collection()
+
+    api.delete_collection(user=user, collection=collection)
+
+    print(f"Collection '{collection}' deleted successfully.")
+
+def main():
+
+    parser = argparse.ArgumentParser(
+        prog='tg-delete-collection',
+        description=__doc__,
+    )
+
+    parser.add_argument(
+        'collection',
+        help='Collection ID to delete'
+    )
+
+    parser.add_argument(
+        '-u', '--api-url',
+        default=default_url,
+        help=f'API URL (default: {default_url})',
+    )
+
+    parser.add_argument(
+        '-U', '--user',
+        default=default_user,
+        help=f'User ID (default: {default_user})'
+    )
+
+    parser.add_argument(
+        '-y', '--yes',
+        action='store_true',
+        help='Skip confirmation prompt'
+    )
+
+    args = parser.parse_args()
+
+    try:
+
+        delete_collection(
+            url = args.api_url,
+            user = args.user,
+            collection = args.collection,
+            confirm = args.yes
+        )
+
+    except Exception as e:
+
+        print("Exception:", e, flush=True)
+
+if __name__ == "__main__":
+    main()