config_store.cpp

#include "config_store.h"
#include <Preferences.h>

void loadConfig(Config& c) {
  Preferences p;
  p.begin("ocellus", true);
  String s = p.getString("cfg", "");
  p.end();
  if (s.length()) configFromJson(std::string(s.c_str()), c);
}

bool saveConfig(const Config& c) {
  Preferences p;
  p.begin("ocellus", false);
  // putString returns bytes written; 0 = nvs_set_str failed (its 4000 B string cap, or a full
  // partition) with the OLD value left intact -- the unit then runs the new config from RAM and
  // silently reverts at reboot. The caller must surface a false, not echo success.
  size_t wrote = p.putString("cfg", configToJson(c).c_str());
  p.end();
  return wrote != 0;
}

uint32_t treatsLoad() {
  Preferences p;
  p.begin("ocellus", true);
  uint32_t t = p.getUInt("treats", 0);
  p.end();
  return t;
}

void treatsSave(uint32_t treats) {
  Preferences p;
  p.begin("ocellus", false);
  p.putUInt("treats", treats);
  p.end();
}

uint8_t resumeIdLoad() {
  Preferences p;
  p.begin("ocellus", true);
  uint8_t id = p.getUChar("lastid", 0xFF);
  p.end();
  return id;
}

// Its own one-byte key rather than a Config field: saving through gConfig would rewrite the whole
// config JSON (~400-700 B) on every pick, and drag the codec, the protocol and config.html along
// for a value the user never sets by hand.
void resumeIdSave(uint8_t id) {
  Preferences p;
  p.begin("ocellus", false);
  p.putUChar("lastid", id);
  p.end();
}