nfc_binary_sensor.cpp

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#include "nfc_binary_sensor.h"
#include "../nfc.h"
#include "../nfc_helpers.h"
#include "esphome/core/log.h"
 
namespace esphome::nfc {
 
ESPHOME_LOG_TAG(TAG, "nfc.binary_sensor");
 
void NfcTagBinarySensor::setup() { this->publish_initial_state(false); }
 
void NfcTagBinarySensor::dump_config() {
  LOG_BINARY_SENSOR("", "NFC Tag Binary Sensor", this);
  if (!this->match_string_.empty()) {
    ESP_LOGCONFIG(TAG, "  Tag %s: %s", this->match_tag_name_ ? LOG_STR_LITERAL("name") : LOG_STR_LITERAL("contains"),
                  this->match_string_.c_str());
    return;
  }
  if (!this->uid_.empty()) {
    char uid_buf[FORMAT_BYTES_BUFFER_SIZE];
    ESP_LOGCONFIG(TAG, "  Tag UID: %s", format_bytes_to(uid_buf, this->uid_));
  }
}
 
void NfcTagBinarySensor::set_ndef_match_string(const char *str) {
  this->match_string_ = StringRef(str);
  this->match_tag_name_ = false;
}
 
void NfcTagBinarySensor::set_tag_name(const char *str) {
  this->match_string_ = StringRef(str);
  this->match_tag_name_ = true;
}
 
void NfcTagBinarySensor::set_uid(const NfcTagUid &uid) { this->uid_ = uid; }
 
bool NfcTagBinarySensor::tag_match_ndef_string(const std::shared_ptr<NdefMessage> &msg) {
  for (const auto &record : msg->get_records()) {
    if (record->get_payload().find(this->match_string_.c_str(), 0, this->match_string_.size()) != std::string::npos) {
      return true;
    }
  }
  return false;
}
 
bool NfcTagBinarySensor::tag_match_tag_name(const std::shared_ptr<NdefMessage> &msg) {
  for (const auto &record : msg->get_records()) {
    if (record->get_payload().find(HA_TAG_ID_PREFIX) != std::string::npos) {
      auto rec_substr = record->get_payload().substr(sizeof(HA_TAG_ID_PREFIX) - 1);
      if (rec_substr.find(this->match_string_.c_str(), 0, this->match_string_.size()) != std::string::npos) {
        return true;
      }
    }
  }
  return false;
}
 
bool NfcTagBinarySensor::tag_match_uid(const NfcTagUid &data) {
  if (data.size() != this->uid_.size()) {
    return false;
  }
 
  for (size_t i = 0; i < data.size(); i++) {
    if (data[i] != this->uid_[i]) {
      return false;
    }
  }
  return true;
}
 
void NfcTagBinarySensor::tag_off(NfcTag &tag) {
  if (!this->match_string_.empty() && tag.has_ndef_message()) {
    if (this->match_tag_name_) {
      if (this->tag_match_tag_name(tag.get_ndef_message())) {
        this->publish_state(false);
      }
    } else {
      if (this->tag_match_ndef_string(tag.get_ndef_message())) {
        this->publish_state(false);
      }
    }
    return;
  }
  if (!this->uid_.empty() && this->tag_match_uid(tag.get_uid())) {
    this->publish_state(false);
  }
}
 
void NfcTagBinarySensor::tag_on(NfcTag &tag) {
  if (!this->match_string_.empty() && tag.has_ndef_message()) {
    if (this->match_tag_name_) {
      if (this->tag_match_tag_name(tag.get_ndef_message())) {
        this->publish_state(true);
      }
    } else {
      if (this->tag_match_ndef_string(tag.get_ndef_message())) {
        this->publish_state(true);
      }
    }
    return;
  }
  if (!this->uid_.empty() && this->tag_match_uid(tag.get_uid())) {
    this->publish_state(true);
  }
}
 
}  // namespace esphome::nfc