From b00c0afa3abe8d990abe923b1e090a3271dfeea6 Mon Sep 17 00:00:00 2001
From: Martin Endler <pokusew@seznam.cz>
Date: Thu, 20 Dec 2018 04:14:02 +0100
Subject: [PATCH] Update example code in README to reflect examples/example.js

---
 README.md | 119 +++++++++++++++++++++++++++++++++---------------------
 1 file changed, 74 insertions(+), 45 deletions(-)

diff --git a/README.md b/README.md
index 249da8c..3b1db72 100644
--- a/README.md
+++ b/README.md
@@ -68,57 +68,86 @@ const pcsclite = require('pcsclite');
 
 const pcsc = pcsclite();
 
-pcsc.on('reader', function(reader) {
+pcsc.on('reader', (reader) => {
 
-    console.log('New reader detected', reader.name);
+	console.log('New reader detected', reader.name);
 
-    reader.on('error', function(err) {
-        console.log('Error(', this.name, '):', err.message);
-    });
+	reader.on('error', err => {
+		console.log('Error(', reader.name, '):', err.message);
+	});
 
-    reader.on('status', function(status) {
-        console.log('Status(', this.name, '):', status);
-        /* check what has changed */
-        const changes = this.state ^ status.state;
-        if (changes) {
-            if ((changes & this.SCARD_STATE_EMPTY) && (status.state & this.SCARD_STATE_EMPTY)) {
-                console.log("card removed");/* card removed */
-                reader.disconnect(reader.SCARD_LEAVE_CARD, function(err) {
-                    if (err) {
-                        console.log(err);
-                    } else {
-                        console.log('Disconnected');
-                    }
-                });
-            } else if ((changes & this.SCARD_STATE_PRESENT) && (status.state & this.SCARD_STATE_PRESENT)) {
-                console.log("card inserted");/* card inserted */
-                reader.connect({ share_mode : this.SCARD_SHARE_SHARED }, function(err, protocol) {
-                    if (err) {
-                        console.log(err);
-                    } else {
-                        console.log('Protocol(', reader.name, '):', protocol);
-                        reader.transmit(new Buffer([0x00, 0xB0, 0x00, 0x00, 0x20]), 40, protocol, function(err, data) {
-                            if (err) {
-                                console.log(err);
-                            } else {
-                                console.log('Data received', data);
-                                reader.close();
-                                pcsc.close();
-                            }
-                        });
-                    }
-                });
-            }
-        }
-    });
+	reader.on('status', (status) => {
+
+		console.log('Status(', reader.name, '):', status);
+
+		// check what has changed
+		const changes = reader.state ^ status.state;
+
+		if (!changes) {
+			return;
+		}
+
+		if ((changes & reader.SCARD_STATE_EMPTY) && (status.state & reader.SCARD_STATE_EMPTY)) {
+
+			console.log("card removed");
+
+			reader.disconnect(reader.SCARD_LEAVE_CARD, err => {
+
+				if (err) {
+					console.log(err);
+					return;
+				}
+
+				console.log('Disconnected');
+
+			});
+
+			return;
+
+		}
+
+		if ((changes & reader.SCARD_STATE_EMPTY) && (status.state & reader.SCARD_STATE_EMPTY)) {
+
+			console.log("card inserted");
+
+			reader.connect({ share_mode: reader.SCARD_SHARE_SHARED }, (err, protocol) => {
+
+				if (err) {
+					console.log(err);
+					return;
+				}
+
+				console.log('Protocol(', reader.name, '):', protocol);
+
+				reader.transmit(Buffer.from([0x00, 0xB0, 0x00, 0x00, 0x20]), 40, protocol, (err, data) => {
+
+					if (err) {
+						console.log(err);
+						return;
+					}
+
+					console.log('Data received', data);
+					reader.close();
+					pcsc.close();
+
+				});
+
+			});
+
+			// noinspection UnnecessaryReturnStatementJS
+			return;
+		}
+
+	});
+
+	reader.on('end', () => {
+		console.log('Reader', reader.name, 'removed');
+	});
 
-    reader.on('end', function() {
-        console.log('Reader',  this.name, 'removed');
-    });
 });
 
-pcsc.on('error', function(err) {
-    console.log('PCSC error', err.message);
+pcsc.on('error', err => {
+	console.log('PCSC error', err.message);
 });
 ```