Starting tests with npm, nmcli basics (to be extended on linux machine)

lib/nmcli.js

@@ -1,5 +1,51 @@
 /**
+ * Scanning WiFis on Mac OS X using nmcli
  * Created by kc on 04.04.16.
  */
 
-// nmcli -m tabular -f SSID,BSSID,SIGNAL,FREQ device wifi
+const _ = require('lodash');
+const tool    = '/usr/bin/nmcli';
+const cmdLine = tool + ' -m tabular -f SSID,BSSID,SIGNAL,FREQ device wifi';
+
+const macRegex = /([0-9a-zA-Z]{1}[0-9a-zA-Z]{1}[:]{1}){5}[0-9a-zA-Z]{1}[0-9a-zA-Z]{1}/;
+/**
+ * Parsing the output of nmcli
+ * @param str output of the tool
+ * @param callback
+ */
+function parseOutput(str, callback) {
+  var err = null;
+
+  try {
+    var lines      = str.split('\n');
+    var wifis = [];
+
+    for (var i = 1, l = lines.length; i < l; i++) {
+      var mac = lines[i].match(macRegex);
+      if (!mac) {
+        continue;
+      }
+      var macStart = lines[i].indexOf(mac[0]);
+      var elements = lines[i].substr(macStart).split(/[ ]+/);
+      wifis.push({
+        'ssid'    : _.trim(lines[i].substr(0, macStart), ' \''),
+        'mac'     : elements[0].trim(),
+        'channel' : parseInt(elements[2].trim(), 10),
+        'rssi'    : parseInt(elements[1].trim()),
+        'security': 'TODO'
+      });
+    }
+  }
+  catch (ex) {
+    err = ex;
+  }
+
+  callback(err, wifis);
+}
+
+
+module.exports = {
+  parseOutput: parseOutput,
+  cmdLine    : cmdLine,
+  tool       : tool
+};