initial signal request

Author: epochcoder

.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto
+
+# Custom for Visual Studio
+*.cs     diff=csharp
+*.sln    merge=union
+*.csproj merge=union
+*.vbproj merge=union
+*.fsproj merge=union
+*.dbproj merge=union
+
+# Standard to msysgit
+*.doc	 diff=astextplain
+*.DOC	 diff=astextplain
+*.docx diff=astextplain
+*.DOCX diff=astextplain
+*.dot  diff=astextplain
+*.DOT  diff=astextplain
+*.pdf  diff=astextplain
+*.PDF	 diff=astextplain
+*.rtf	 diff=astextplain
+*.RTF	 diff=astextplain

.gitignore

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+#################
+## Eclipse
+#################
+
+*.pydevproject
+.project
+.metadata
+bin/
+tmp/
+*.tmp
+*.bak
+*.swp
+*~.nib
+local.properties
+.classpath
+.settings/
+.loadpath
+
+# External tool builders
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+
+# Locally stored "Eclipse launch configurations"
+*.launch
+
+# CDT-specific
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+# PDT-specific
+.buildpath
+
+
+#################
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+#################
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+# User-specific files
+*.suo
+*.user
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+[Bb]in/
+[Oo]bj/
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+# MSTest test Results
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+[Bb]uild[Ll]og.*
+
+*_i.c
+*_p.c
+*.ilk
+*.meta
+*.obj
+*.pch
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+*.pgc
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+*.rsp
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+*.log
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+.builds
+*.pidb
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+*.[Rr]e[Ss]harper
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+# NCrunch
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+[Ee]xpress/
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+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
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+DocProject/Help/Html2
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+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.Publish.xml
+*.pubxml
+
+# NuGet Packages Directory
+## TODO: If you have NuGet Package Restore enabled, uncomment the next line
+#packages/
+
+# Windows Azure Build Output
+csx
+*.build.csdef
+
+# Windows Store app package directory
+AppPackages/
+
+# Others
+sql/
+*.Cache
+ClientBin/
+[Ss]tyle[Cc]op.*
+~$*
+*~
+*.dbmdl
+*.[Pp]ublish.xml
+*.pfx
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+# RIA/Silverlight projects
+Generated_Code/
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+# Backup & report files from converting an old project file to a newer
+# Visual Studio version. Backup files are not needed, because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
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+# SQL Server files
+App_Data/*.mdf
+App_Data/*.ldf
+
+#############
+## Windows detritus
+#############
+
+# Windows image file caches
+Thumbs.db
+ehthumbs.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Mac crap
+.DS_Store
+
+
+#############
+## Python
+#############
+
+*.py[co]
+
+# Packages
+*.egg
+*.egg-info
+dist/
+build/
+eggs/
+parts/
+var/
+sdist/
+develop-eggs/
+.installed.cfg
+
+# Installer logs
+pip-log.txt
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+# Unit test / coverage reports
+.coverage
+.tox
+
+#Translations
+*.mo
+
+#Mr Developer
+.mr.developer.cfg
+node_modules/

signal-monitor.js

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+// requires
+var sr = require('./signal-request.js').SignalRetriever;
+
+// constants
+var INTERVAL = 500,
+    URL = 'http://mifi.afrihost.com/api/monitoring/status';
+
+// app variables
+var timeoutId, previousReading;
+
+// main application loop
+timeoutId = setTimeout(function retrieve() {
+  // use our signal retriever module to get the current signal strength
+  sr.retrieve(URL, function(err, signal) {
+    if (err || !signal.SignalStrength) {
+      clearTimeout(timeoutId);
+      console.log(err || 'signal strength not available');
+      return;
+    }
+
+    var strength = parseInt(signal.SignalStrength[0], 10);
+    if (!previousReading || previousReading !== strength) {
+      previousReading = strength; 
+
+      // strength changed, let other modules know
+      console.log(previousReading);
+    }
+
+    // poll again
+    setTimeout(retrieve, INTERVAL);
+  });
+}, INTERVAL);

signal-request.js

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+// requires
+var request = require('request'),
+    xml2js = require('xml2js');
+
+// define our main class
+var SignalRetriever = function() {
+  var that = this;
+
+  function retrieve(url, callback) {
+    request(url, function(error, response, body) {
+      var xml;
+      if (!error && response.statusCode == 200) {
+        // parse the xml returned from the url
+        xml2js.parseString(body, function(err, result) {
+          if (err) {
+            callback.call(this, 'could not parse xml[' + result + ']');  
+          } else {
+            if (result && result.response) {
+              // check if a response object exists and return to caller
+              callback.call(this, null, result.response);
+            } else {
+              callback.call(this, 'did not get expected output from url[' + url + ']!');  
+            }
+          }
+        });
+      } else {
+          callback.call(this, 'could not read url[' + url + ']');
+      }
+    }.bind(that));
+  }
+
+  return {
+    retrieve: retrieve
+  };
+};
+
+// export a new instance of our module
+exports.SignalRetriever = new SignalRetriever();