From 9206858ea0f1a918d0c89aa340d1d88105a0c56f Mon Sep 17 00:00:00 2001
From: "Morgan 'ARR\\!' Allen" <morganrallen@gmail.com>
Date: Wed, 31 Jul 2024 12:36:57 -0700
Subject: [PATCH] ALL YOUR CONFIGULATORS ARE BELONG TO US

---
 CMakeLists.txt         | 12 ++++++
 include/configulator.h | 85 ++++++++++++++++++++++++++++++++++++++++++
 src/configulator.c     | 42 +++++++++++++++++++++
 3 files changed, 139 insertions(+)
 create mode 100644 CMakeLists.txt
 create mode 100644 include/configulator.h
 create mode 100644 src/configulator.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..1baa7db
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,12 @@
+set(REQUIRES "")
+
+if(${ESP_PLATFORM})
+  list(APPEND REQUIRES nvs_flash)
+endif()
+
+idf_component_register(
+  SRCS src/configulator.c
+  INCLUDE_DIRS "include"
+  # if platform esp...
+  REQUIRES ${REQUIRES}
+)
diff --git a/include/configulator.h b/include/configulator.h
new file mode 100644
index 0000000..e74c74a
--- /dev/null
+++ b/include/configulator.h
@@ -0,0 +1,85 @@
+#ifndef __CONFIGULATOR_H__
+#define __CONFIGULATOR_H__
+
+#if ESP_PLATFORM
+#include "nvs_flash.h"
+#endif
+
+#define CFGLR_BACKENDS_MAX  (04)
+#define CFGLR_ELEMENTS_MAX  (04)
+
+typedef enum {
+  CFGLR_DATATYPE_U8,
+  CFGLR_DATATYPE_I8,
+  CFGLR_DATATYPE_U16,
+  CFGLR_DATATYPE_I16,
+  CFGLR_DATATYPE_U32,
+  CFGLR_DATATYPE_I32,
+  CFGLR_DATATYPE_U64,
+  CFGLR_DATATYPE_I64,
+  CFGLR_DATATYPE_STR,
+  CFGLR_DATATYPE_BIN,
+} cfglr_datatype_e;
+
+typedef void (*cfglr_read_callback)(const char *key, void *out);
+typedef void (*cfglr_write_callback)(const char *key, void *valoue, size_t length);
+
+typedef struct {
+  cfglr_read_callback read;
+  cfglr_write_callback write;
+} cfglr_data_handler_t;
+
+typedef struct {
+  const char *key;
+  bool dirty;
+  cfglr_datatype_e datatype;
+  void *default_data;
+  void *data;
+} cfglr_element_t;
+
+#define CFGLR_ELEMENT(KEY, TYPE, DEFAULT) (cfglr_element_t){\
+  .key = KEY,\
+  .dirty = 1,\
+  .default_data = (void*)DEFAULT,\
+  .datatype = TYPE\
+}
+
+#define CFGLR_ELEMENT_U8(KEY, DEFAULT) CFGLR_ELEMENT(KEY, CFGLR_DATATYPE_U8, DEFAULT)
+
+typedef struct cfglr_backend cfglr_backend_t;
+typedef struct cfglr_handle_struct cfglr_handle_t;
+
+typedef void (*cfglr_backend_open_t)(cfglr_backend_t *backend, cfglr_handle_t *handle);
+typedef void (*cfglr_backend_close_t)(cfglr_backend_t *backend, cfglr_handle_t *handle);
+typedef void (*cfglr_backend_get_t)(cfglr_backend_t *backend, cfglr_element_t *element, cfglr_handle_t *handle);
+
+void cfglr_backend_nvs_open(cfglr_backend_t *backend, cfglr_handle_t *handle);
+void cfglr_backend_nvs_close(cfglr_backend_t *backend, cfglr_handle_t *handle);
+
+struct cfglr_backend {
+  cfglr_backend_open_t open;
+  cfglr_backend_close_t close;
+  cfglr_backend_get_t get;
+#if ESP_PLATFORM
+  nvs_handle_t nvs_handle;
+#endif
+};
+
+#define CFGLR_BACKEND(OPEN, CLOSE) {\
+  .open = OPEN,\
+  .close = CLOSE,\
+}
+
+#define CFGLR_BACKEND_NVS() CFGLR_BACKEND(&cfglr_backend_nvs_open, &cfglr_backend_nvs_close) 
+
+struct cfglr_handle_struct {
+  const char *namespace;
+  bool store_defaults;
+  cfglr_backend_t backends[CFGLR_BACKENDS_MAX];
+  cfglr_element_t elements[CFGLR_ELEMENTS_MAX];
+};
+
+uint8_t cfglr_init(cfglr_handle_t *handle);
+uint8_t cfglr_fetch_data(cfglr_backend_t *backend, cfglr_element_t *element, cfglr_handle_t *handler);
+
+#endif//__CONFIGULATOR_H__
diff --git a/src/configulator.c b/src/configulator.c
new file mode 100644
index 0000000..acb9dae
--- /dev/null
+++ b/src/configulator.c
@@ -0,0 +1,42 @@
+#include "configulator.h"
+#ifdef ESP_PLATFORM
+#include "nvs_flash.h"
+#include "esp_log.h"
+
+#define TAG "CFGLR"
+
+void cfglr_backend_nvs_open(cfglr_backend_t *backend, cfglr_handle_t *handle) {
+  ESP_LOGI(TAG, "opening NVS partition: %s", handle->namespace);
+  esp_err_t err = nvs_open(handle->namespace, NVS_READWRITE, &backend->nvs_handle);
+}
+
+void cfglr_backend_nvs_close(cfglr_backend_t *backend, cfglr_handle_t *handle) {
+}
+#endif
+
+uint8_t cfglr_init(cfglr_handle_t *handle) {
+  uint8_t tick = 0;
+  cfglr_backend_t *backend;
+  cfglr_element_t *element;
+
+  while((backend = &handle->backends[tick])) {
+    if(backend->open == NULL) break;
+
+    backend->open(backend, handle);
+
+    ++tick;
+  }
+
+  tick = 0;
+
+  while((element = &handle->elements[tick])) {
+    if(element->key == NULL) break;
+
+    // all elements should start out dirty, =
+    // they should be fetched, or defaulted
+    if(element->dirty) {
+      backend->get(backend, element, handle);
+    }
+  }
+  return 0;
+}