From 1ed0e9cde1dcc3623403b338b844529f3932c654 Mon Sep 17 00:00:00 2001
From: Emily Boudreaux <thomas@boudreauxmail.com>
Date: Mon, 5 May 2025 11:59:24 -0400
Subject: [PATCH] feat(python/const): added constants bindings

constants module can now be fully accessed from python
---
 src/python/const/bindings.cpp | 39 +++++++++++++++++++++++++++++++++++
 src/python/const/bindings.h   |  5 +++++
 src/python/const/meson.build  | 17 +++++++++++++++
 3 files changed, 61 insertions(+)
 create mode 100644 src/python/const/bindings.cpp
 create mode 100644 src/python/const/bindings.h
 create mode 100644 src/python/const/meson.build

diff --git a/src/python/const/bindings.cpp b/src/python/const/bindings.cpp
new file mode 100644
index 0000000..c606e76
--- /dev/null
+++ b/src/python/const/bindings.cpp
@@ -0,0 +1,39 @@
+#include <pybind11/pybind11.h>
+#include <pybind11/stl.h> // Needed for vectors, maps, sets, strings
+#include <pybind11/stl_bind.h> // Needed for binding std::vector, std::map etc if needed directly
+
+#include <string>
+#include "const.h"
+#include "bindings.h"
+
+namespace py = pybind11;
+
+
+void register_const_bindings(pybind11::module &const_submodule) {
+    py::class_<Constant>(const_submodule, "Constant")
+        .def_readonly("name", &Constant::name)
+        .def_readonly("value", &Constant::value)
+        .def_readonly("uncertainty", &Constant::uncertainty)
+        .def_readonly("unit", &Constant::unit)
+        .def_readonly("reference", &Constant::reference)
+        .def("__repr__", [](const Constant &c) {
+            return "<Constant(name='" + c.name + "', value=" + std::to_string(c.value) +
+                   ", uncertainty=" + std::to_string(c.uncertainty) +
+                   ", unit='" + c.unit + "')>";
+        });
+
+    py::class_<Constants>(const_submodule, "Constants")
+        .def_property_readonly("loaded", &Constants::isLoaded)
+        .def("get", &Constants::get, py::arg("name"), "Get a constant by name. Returns None if not found.")
+        .def("__getitem__", &Constants::get, py::arg("name"))
+        .def("has", &Constants::has, py::arg("name"), "Check if a constant exists by name.")
+        .def("keys", &Constants::keys, "Get a list of all constant names.")
+        .def(py::init([]() {
+            return &Constants::getInstance();
+            }),
+            // Tell pybind11 Python doesn't own this memory.
+            py::return_value_policy::reference,
+            "Get the singleton instance of Constants."
+        );
+
+}
diff --git a/src/python/const/bindings.h b/src/python/const/bindings.h
new file mode 100644
index 0000000..01cd891
--- /dev/null
+++ b/src/python/const/bindings.h
@@ -0,0 +1,5 @@
+#pragma once
+
+#include <pybind11/pybind11.h>
+
+void register_const_bindings(pybind11::module &const_submodule);
diff --git a/src/python/const/meson.build b/src/python/const/meson.build
new file mode 100644
index 0000000..a816819
--- /dev/null
+++ b/src/python/const/meson.build
@@ -0,0 +1,17 @@
+# Define the library
+bindings_sources = files('bindings.cpp')
+bindings_headers = files('bindings.h')
+
+dependencies = [
+    const_dep,
+    python3_dep,
+    pybind11_dep,
+]
+
+shared_module('py_const',
+    bindings_sources,
+    include_directories: include_directories('.'),
+    cpp_args: ['-fvisibility=default'],
+    install : true,
+    dependencies: dependencies,
+)