From 21598c1afcd1ed503e895962705443fbb8cd1d6c Mon Sep 17 00:00:00 2001
From: peteruithoven <peter@peteruithoven.nl>
Date: Wed, 7 May 2014 15:18:08 +0200
Subject: [PATCH] Page leave prevention when appropriate

---
 js/BoxesPage.js               | 10 ++++++++++
 js/ConnectingToNetworkPage.js |  4 ++++
 js/api/ConnectAPI.js          | 14 +++++++-------
 js/main.js                    | 27 +++++++++++++++++++++++++++
 4 files changed, 48 insertions(+), 7 deletions(-)

diff --git a/js/BoxesPage.js b/js/BoxesPage.js
index f71a367..e177128 100644
--- a/js/BoxesPage.js
+++ b/js/BoxesPage.js
@@ -21,6 +21,8 @@ var BoxesPage = (function (w) {
 		_findItem = _list.find("#findItem");
 		
 		_connectAPI.refreshing = onRefreshing;
+		_connectAPI.listFailed = onListFailed;
+		_connectAPI.listSuccess = onlistSuccess;
 		_connectAPI.listUpdated = onListUpdated;
 		_connectAPI.boxAppeared = onBoxAppeared;
 		_connectAPI.boxDisapeared = onBoxDisapeared;
@@ -38,6 +40,14 @@ var BoxesPage = (function (w) {
 		//console.log("onRefreshing");
 		d3d.util.showLoader(true);
 	}
+	function onListFailed() {
+		d3d.util.enableRefreshPrevention();
+		d3d.util.enableLeaveWarning("You're not connecting to the internet, leaving now will interrupt the connection proces");
+	}
+	function onlistSuccess() {
+		d3d.util.disableRefreshPrevention();
+		d3d.util.disableLeaveWarning();
+	}
 	function onListUpdated(boxesData) {
 		//console.log("onListUpdated: ",boxesData);
 	}
diff --git a/js/ConnectingToNetworkPage.js b/js/ConnectingToNetworkPage.js
index a66d327..ab79841 100644
--- a/js/ConnectingToNetworkPage.js
+++ b/js/ConnectingToNetworkPage.js
@@ -132,6 +132,10 @@
 					link = d3d.util.replaceURLParameters(link,linkParams);
 					$.mobile.changePage(link);
 					connectedBoxNetworkAPI.stopAutoRefresh();
+					
+					// disable warnings that are enabled on boxes page
+					d3d.util.disableRefreshPrevention();
+					d3d.util.disableLeaveWarning();
 				}
 			};
 			connectedBoxNetworkAPI.startAutoRefresh();
diff --git a/js/api/ConnectAPI.js b/js/api/ConnectAPI.js
index 4ca1688..ce5b311 100644
--- a/js/api/ConnectAPI.js
+++ b/js/api/ConnectAPI.js
@@ -9,6 +9,8 @@ function ConnectAPI() {
 	
 	// callbacks
 	this.refreshing; 		// I'm refreshing my list
+	this.listFailed;		// list retrieval from connect.doodle3d.com failed
+	this.listSuccess;		// list retrieval from connect.doodle3d.com succeeded 
 	this.listUpdated; 	// the list of boxes is updated / changed
 	this.boxAppeared; 	// a new box appeared
 	this.boxDisapeared; // a box disappeared
@@ -47,12 +49,14 @@ function ConnectAPI() {
 					//console.log("ConnectAPI:list failed: ",response);
 					if(failedHandler) failedHandler(response);
 				} else {
+					if(_self.listSuccess) {_self.listSuccess(); }
 					completeHandler(response.data);
 				}
 			}
 		}).fail(function() {
 			//console.log("ConnectAPI:list failed");
 			if(failedHandler) failedHandler();
+			if(_self.listFailed) {_self.listFailed(); }
 		});
 	};
 	
@@ -71,12 +75,8 @@ function ConnectAPI() {
 		clearTimeout(_refreshDelay);
 	}
 	this.refresh = function(listUpdated) {
-		if(listUpdated) {
-			_self.listUpdated = listUpdated;
-		}
-		if(_self.refreshing) {
-			_self.refreshing();
-		}
+		if(listUpdated) { _self.listUpdated = listUpdated; }
+		if(_self.refreshing) { _self.refreshing(); }
 		
 		_self.list(function(foundBoxes) {
 			//console.log("  foundBoxes: ",foundBoxes);
@@ -86,8 +86,8 @@ function ConnectAPI() {
 				clearTimeout(_refreshDelay);
 				_refreshDelay = setTimeout(_self.refresh, _refreshInterval);
 			}
-			//removeBox(_apBox.localip,true); // TODO: why again?
 		}, function() {
+			console.log("ConnectAPI list retrieve failed");
 			// if web is not accessible try to find a box as an accesspoint
 			// if not found, we look for a wired box
 			_networkAPI.alive(_apBox.localip,_boxTimeoutTime,function() {
diff --git a/js/main.js b/js/main.js
index 68ca8ed..cda3550 100644
--- a/js/main.js
+++ b/js/main.js
@@ -64,6 +64,33 @@ d3d.util = {
 			formData[field['name']] = field['value']; 
 		});
 		return formData;
+	},
+	enableRefreshPrevention:function() {
+		$(document).on("keydown",d3d.util.preventRefresh);
+	},
+	disableRefreshPrevention:function() {
+		$(document).off("keydown",d3d.util.preventRefresh);
+	},
+	preventRefresh:function(event) {
+		if((event.which === 82 && (event.ctrlKey || event.metaKey)) || // ctrl+r
+				event.which === 116) { // F5
+			console.log("d3d.util.preventRefresh");
+			event.preventDefault();
+			event.stopImmediatePropagation();
+			return false;
+		}
+	},
+	disableLeaveWarning:function() {
+		window.onbeforeunload = null;
+	},
+	enableLeaveWarning:function(warning) {
+		if(warning === undefined) {
+			warning = "Are you sure you want to leave?";
+		}
+		window.onbeforeunload = function() {
+			console.log("WARNING:"+warning);
+			return warning;
+		};
 	}
 };