From c73e990e81720f2ed7035034a1579df9ac1942fb Mon Sep 17 00:00:00 2001
From: Alex Tselegidis <alextselegidis@gmail.com>
Date: Sat, 16 Jul 2016 21:06:55 +0200
Subject: [PATCH] The booking wizard will parse two new GET parameters for
 setting default values to providers and services (fixes #24).

---
 src/assets/js/frontend_book.js     | 34 ++++++++++++++++++++++++------
 src/assets/js/general_functions.js | 20 +++++++++++++-----
 2 files changed, 43 insertions(+), 11 deletions(-)

diff --git a/src/assets/js/frontend_book.js b/src/assets/js/frontend_book.js
index a1298e06..e7b7a62f 100644
--- a/src/assets/js/frontend_book.js
+++ b/src/assets/js/frontend_book.js
@@ -97,20 +97,42 @@ window.FrontendBook = window.FrontendBook || {};
             }
         });
 
-
-        // Bind the event handlers (might not be necessary every time
-        // we use this class).
+        // Bind the event handlers (might not be necessary every time we use this class).
         if (bindEventHandlers) {
             _bindEventHandlers();
         }
 
-        // If the manage mode is true, the appointments data should be
-        // loaded by default.
+        // If the manage mode is true, the appointments data should be loaded by default.
         if (FrontendBook.manageMode) {
             _applyAppointmentData(GlobalVariables.appointmentData,
                     GlobalVariables.providerData, GlobalVariables.customerData);
         } else {
-            $('#select-service').trigger('change'); // Load the available hours.
+            var $selectProvider = $('#select-provider');
+            var $selectService = $('#select-service'); 
+
+            // Check if a specific service was selected.
+            var selectedServiceId = GeneralFunctions.getUrlParameter(location.href, 'service');
+
+            if (selectedServiceId && $selectService.find('option[value="' + selectedServiceId + '"]').length > 0) {
+                $selectService
+                    .val(selectedServiceId)
+                    .prop('disabled', true)
+                    .css('opacity', '0.5');
+            }
+
+            $selectService.trigger('change'); // Load the available hours.
+
+            // Check if a specific provider was selected. 
+            var selectedProviderId = GeneralFunctions.getUrlParameter(location.href, 'provider');
+            
+            if (selectedProviderId && $selectProvider.find('option[value="' + selectedProviderId + '"]').length > 0) {
+                $selectProvider
+                    .val(selectedProviderId)
+                    .prop('disabled', true)
+                    .css('opacity', '0.5')
+                    .trigger('change');
+            }
+
         }
     };
 
diff --git a/src/assets/js/general_functions.js b/src/assets/js/general_functions.js
index e9c217be..44bb9327 100644
--- a/src/assets/js/general_functions.js
+++ b/src/assets/js/general_functions.js
@@ -114,11 +114,21 @@ window.GeneralFunctions = window.GeneralFunctions || {};
      * @return {String} Returns the parameter value.
      */
     exports.getUrlParameter = function(url, parameterName) {
-        parameterName = parameterName.replace(/[\[]/,'\\\[').replace(/[\]]/,'\\\]');
-        var regexS = '[\\#&]' + parameterName + '=([^&#]*)';
-        var regex = new RegExp(regexS);
-        var results = regex.exec(url);
-        return (results == null) ? '' : results[1];
+        var parsedUrl = url.substr(url.indexOf('?')).slice(1).split('&');
+
+        for (var index in parsedUrl) {
+            var parsedValue = parsedUrl[index].split('='); 
+
+            if (parsedValue.length === 1 && parsedValue[0] === parameterName) {
+                return ''; 
+            }
+
+            if (parsedValue.length === 2 && parsedValue[0] === parameterName) {
+                return decodeURIComponent(parsedValue[1]); 
+            }
+        }
+
+        return '';
     };
 
     /**