Add NFC binary sensor platform (#6068)

esphome/components/nfc/binary_sensor/binary_sensor.cpp

@@ -0,0 +1,114 @@
+#include "binary_sensor.h"
+#include "../nfc_helpers.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace nfc {
+
+static const char *const TAG = "nfc.binary_sensor";
+
+void NfcTagBinarySensor::setup() {
+  this->parent_->register_listener(this);
+  this->publish_initial_state(false);
+}
+
+void NfcTagBinarySensor::dump_config() {
+  std::string match_str = "name";
+
+  LOG_BINARY_SENSOR("", "NFC Tag Binary Sensor", this);
+  if (!this->match_string_.empty()) {
+    if (!this->match_tag_name_) {
+      match_str = "contains";
+    }
+    ESP_LOGCONFIG(TAG, "  Tag %s: %s", match_str.c_str(), this->match_string_.c_str());
+    return;
+  }
+  if (!this->uid_.empty()) {
+    ESP_LOGCONFIG(TAG, "  Tag UID: %s", format_bytes(this->uid_).c_str());
+  }
+}
+
+void NfcTagBinarySensor::set_ndef_match_string(const std::string &str) {
+  this->match_string_ = str;
+  this->match_tag_name_ = false;
+}
+
+void NfcTagBinarySensor::set_tag_name(const std::string &str) {
+  this->match_string_ = str;
+  this->match_tag_name_ = true;
+}
+
+void NfcTagBinarySensor::set_uid(const std::vector<uint8_t> &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_) != 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_) != std::string::npos) {
+        return true;
+      }
+    }
+  }
+  return false;
+}
+
+bool NfcTagBinarySensor::tag_match_uid(const std::vector<uint8_t> &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 nfc
+}  // namespace esphome