Add library usage in order to improve it

Author: ivanalemunioz

package-lock.json

@@ -23,6 +23,7 @@
   },
   "homepage": "https://github.com/AfipSDK/afip.js#readme",
   "dependencies": {
+    "mixpanel": "^0.17.0",
     "node-forge": "^1.0.0",
     "soap": "^0.24.0",
     "xml2js": "^0.4.22"

package.json

@@ -3,6 +3,7 @@ const path = require('path');
 const soap = require('soap');
 const forge = require('node-forge');
 const xml2js = require('xml2js');
+const Mixpanel = require('mixpanel');
 
 // XML parser
 var xmlParser = new xml2js.Parser({
@@ -85,9 +86,15 @@ function Afip(options = {}){
 	// Create an Afip instance if it is not
 	if (!(this instanceof Afip)) {return new Afip(options)}
 
+	// Create an instance of the mixpanel client
+	this.mixpanel = Mixpanel.init('e87ee11c8cc288e5c5dc213c4d957c7e');
+	this.mixpanelRegister = {};
+
+	this.mixpanelRegister['afip_sdk_library'] = 'javascript';
 
 	if (!options.hasOwnProperty('CUIT')) {throw new Error("CUIT field is required in options array");}
 
+
 	// Define default options
 	if (!options.hasOwnProperty('production')) {options['production'] = false;}
 	if (!options.hasOwnProperty('cert')) {options['cert'] = 'cert';}
@@ -96,6 +103,13 @@ function Afip(options = {}){
 	if (!options.hasOwnProperty('ta_folder')) {options['ta_folder'] = __dirname+'/Afip_res/';}
 	if (options['production'] !== true) {options['production'] = false;}
 
+	this.mixpanelRegister['distinct_id'] = options['CUIT'];
+	this.mixpanelRegister['production'] = options['production'];
+
+	try {
+		this.mixpanel.track('initialized', Object.assign({}, this.mixpanelRegister, options));
+	} catch (e) {}
+
 	this.options = options;
 
 	this.CUIT 		= options['CUIT'];
@@ -258,6 +272,28 @@ Afip.prototype.CreateServiceTA = async function(service) {
 	}));
 }
 
+
+/**
+ * Track SDK usage
+ * 
+ * @param string web_service ID of the web service used
+ * @param string operation SOAP operation called 
+ * @param array params Parameters for the ws
+ **/
+Afip.prototype.TrackUsage = function(web_service, operation, params = {}) {
+	options = {};
+
+	if (web_service === 'wsfe' && operation === 'FECAESolicitar') {
+		if (params['FeCAEReq'] && params['FeCAEReq']['FeCabReq'] && params['FeCAEReq']['FeCabReq']['CbteTipo']) {
+			options['CbteTipo'] = params['FeCAEReq']['FeCabReq']['CbteTipo'];
+		}
+	}
+
+	try {
+		this.mixpanel.track(web_service+'.'+operation, Object.assign({}, this.mixpanelRegister, options));
+	} catch (e) {}
+}
+
 /**
  * Create generic Web Service
  * 

src/Afip.js

@@ -142,6 +142,8 @@ module.exports = class AfipWebService {
 		// Call to SOAP method
 		let [ result ] = await this.soapClient[operation+'Async'](params);
 
+		this.afip.TrackUsage(this.options['service'], operation, params);
+
 		//Return response parsed as JSON
 		return result;
 	}

src/Class/AfipWebService.js

@@ -16,7 +16,7 @@ module.exports = class ElectronicBilling extends AfipWebService {
 			afip
 		}
 
-		super(options);
+		super(options, { service: 'wsfe' });
 	}
 
 	/**

src/Class/ElectronicBilling.js

@@ -16,7 +16,7 @@ module.exports = class RegisterScopeFive extends AfipWebService {
 			afip
 		}
 
-		super(options);
+		super(options, { service: 'ws_sr_padron_a5' });
 	}
 	/**
 	 * Asks to web service for servers status {@see WS 

src/Class/RegisterScopeFive.js

@@ -16,7 +16,7 @@ module.exports = class RegisterScopeFour extends AfipWebService {
 			afip
 		}
 
-		super(options);
+		super(options, { service: 'ws_sr_padron_a4' });
 	}
 	/**
 	 * Asks to web service for servers status {@see WS 

src/Class/RegisterScopeFour.js

@@ -16,7 +16,7 @@ module.exports = class RegisterScopeTen extends AfipWebService {
 			afip
 		}
 
-		super(options);
+		super(options, { service: 'ws_sr_padron_a10' });
 	}
 	/**
 	 * Asks to web service for servers status {@see WS 

src/Class/RegisterScopeTen.js

@@ -16,7 +16,7 @@ module.exports = class RegisterScopeThirteen extends AfipWebService {
 			afip
 		}
 
-		super(options);
+		super(options, { service: 'ws_sr_padron_a13' });
 	}
 	/**
 	 * Asks to web service for servers status {@see WS