From 1f5924687617b19f1e06aebc7221ecd52747b637 Mon Sep 17 00:00:00 2001
From: Santiago Gimeno <santiago.gimeno@quantion.es>
Date: Sat, 6 Jul 2013 22:03:22 +0200
Subject: [PATCH] Improve example

- Call cardreader.connect on card insertion, cardreader.disconnect
  on card removal.
- It fixes bug #3.
---
 README.md           | 35 +++++++++++++++++++++--------------
 examples/example.js | 33 +++++++++++++++++++++------------
 2 files changed, 42 insertions(+), 26 deletions(-)

diff --git a/README.md b/README.md
index 640fe9d..160006b 100644
--- a/README.md
+++ b/README.md
@@ -37,26 +37,33 @@ Example
             if (changes) {
                 if ((changes & this.SCARD_STATE_EMPTY) && (status.state & this.SCARD_STATE_EMPTY)) {
                     console.log("card removed");/* card removed */
+                    reader.disconnect(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(function(err, protocol) {
+                        if (err) {
+                            console.log(err);
+                        } else {
+                            console.log('Protocol(', this.name, '):', protocol);
+                            reader.transmit(new Buffer([0x00, 0xB0, 0x00, 0x00, 0x20]), 40, 1, function(err, data) {
+                                if (err) {
+                                    console.log(err);
+                                } else {
+                                    console.log('Data received', data);
+                                }
+                            });
+                        }
+                    });
                 }
             }
         });
 
-        /* You can connect to a smart card */
-        reader.connect(function(err, protocol) {
-            if (err) {
-                console.log(err);
-            } else {
-                console.log('Protocol(', this.name, '):', protocol);
-                /* And transmit data */
-                reader.transmit(new Buffer([0x00, 0xB0, 0x00, 0x00, 0x20]), 40, 1, function(err, data) {
-                    if (err) console.log(err);
-                    else console.log('Data received', data);
-                })
-            }
-        });
-
         reader.on('end', function() {
             console.log('Reader',  this.name, 'removed');
         });
diff --git a/examples/example.js b/examples/example.js
index 62ec866..c6b2537 100644
--- a/examples/example.js
+++ b/examples/example.js
@@ -16,8 +16,29 @@ pcsc.on('reader', function(reader) {
         if (changes) {
             if ((changes & this.SCARD_STATE_EMPTY) && (status.state & this.SCARD_STATE_EMPTY)) {
                 console.log("card removed");/* card removed */
+                reader.disconnect(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(function(err, protocol) {
+                    if (err) {
+                        console.log(err);
+                    } else {
+                        console.log('Protocol(', this.name, '):', protocol);
+                        reader.transmit(new Buffer([0x00, 0xB0, 0x00, 0x00, 0x20]), 40, 1, function(err, data) {
+                            if (err) {
+                                console.log(err);
+                            } else {
+                                console.log('Data received', data);
+                            }
+                        });
+                    }
+                });
             }
         }
     });
@@ -25,18 +46,6 @@ pcsc.on('reader', function(reader) {
     reader.on('end', function() {
         console.log('Reader',  this.name, 'removed');
     });
-
-    reader.connect(function(err, protocol) {
-        if (err) {
-            console.log(err);
-        } else {
-            console.log('Protocol(', this.name, '):', protocol);
-            reader.transmit(new Buffer([0x00, 0xB0, 0x00, 0x00, 0x20]), 40, 1, function(err, data) {
-                if (err) console.log(err);
-                else console.log('Data received', data);
-            })
-        }
-    });
 });
 
 pcsc.on('error', function(err) {