From bb19150e6ad6f7f34a31d8ac6e3e52c104839dcb Mon Sep 17 00:00:00 2001
From: "Niels Erik G. Nielsen" <nielserik@indexdata.com>
Date: Mon, 22 Apr 2013 13:15:25 -0400
Subject: [PATCH] Adds error listener to alert user. Formats code.

---
 src/META-INF/resources/pz2utils/listeners.js |  367 ++++++++++++++------------
 1 file changed, 204 insertions(+), 163 deletions(-)

diff --git a/src/META-INF/resources/pz2utils/listeners.js b/src/META-INF/resources/pz2utils/listeners.js
index 91ef576..73e592b 100644
--- a/src/META-INF/resources/pz2utils/listeners.js
+++ b/src/META-INF/resources/pz2utils/listeners.js
@@ -1,180 +1,221 @@
-  var renderTargetsReqVar;
-  var renderOnRecordTargetsReqVar;
-  
-  // Renders UI elements listed in 'renderWhileActiveclients', optionally doing 
-  // another update round-trip to Pazpar2 when done.
-  function renderTargets(doRefresh)
-  {
-	//console.log('rendering ' + renderWhileActiveclients);
-	var sourcecomp = document.getElementById("pz2watch:activeclientsField");
-    jsf.ajax.request(sourcecomp, null,{render: renderWhileActiveclients});
-    if (doRefresh) {
-		//console.log('Will do another ajax request after a timeout in order to render: pz2watch:activeclientsField');  
-	    renderTargetsReqVar=setTimeout(
-	     function() {              
-	       //console.log('Making request for pz2watch:activeclientsField');
-	       jsf.ajax.request(sourcecomp, null,{render: "pz2watch:activeclientsField"});       
-	     }
-	     ,500);
-    } else {
-    	//console.log("No further updates from server requested");
-    }
+var renderTargetsReqVar;
+var renderOnRecordTargetsReqVar;
+
+// Renders UI elements listed in 'renderWhileActiveclients', optionally doing
+// another update round-trip to Pazpar2 when done.
+function renderTargets(doRefresh) {
+  // console.log('rendering ' + renderWhileActiveclients);
+  var sourcecomp = document.getElementById("pz2watch:activeclientsField");
+  jsf.ajax.request(sourcecomp, null, {
+    render : renderWhileActiveclients
+  });
+  if (doRefresh) {
+    // console.log('Will do another ajax request after a timeout in order to
+    // render: pz2watch:activeclientsField');
+    renderTargetsReqVar = setTimeout(function() {
+      // console.log('Making request for pz2watch:activeclientsField');
+      jsf.ajax.request(sourcecomp, null, {
+        render : "pz2watch:activeclientsField"
+      });
+    }, 500);
+  } else {
+    // console.log("No further updates from server requested");
+  }
+}
+
+// Renders UI elements listed in 'renderWhileActiveclientsRecord', optionally
+// doing
+// another record request when done.
+function renderOnRecordTargets(doRefresh) {
+  // console.log('rendering ' + renderWhileActiveclientsRecord);
+  var sourcecomp = document.getElementById("pz2watch:activeclientsFieldRecord");
+  jsf.ajax.request(sourcecomp, null, {
+    render : renderWhileActiveclientsRecord
+  });
+  if (doRefresh) {
+    // console.log('Will do another ajax request after a timeout in order to
+    // render: pz2watch:activeclientsFieldRecord');
+    renderOnRecordTargetsReqVar = setTimeout(function() {
+      // console.log('Making request for pz2watch:activeclientsFieldRecord');
+      jsf.ajax.request(sourcecomp, null, {
+        render : "pz2watch:activeclientsFieldRecord"
+      });
+    }, 1000);
+  } else {
+    // console.log("No further updates from server requested");
   }
-  
-  // Renders UI elements listed in 'renderWhileActiveclientsRecord', optionally doing 
-  // another record request when done.
-  function renderOnRecordTargets(doRefresh)
-  {
-	console.log('rendering ' + renderWhileActiveclientsRecord);
-	var sourcecomp = document.getElementById("pz2watch:activeclientsFieldRecord");
-    jsf.ajax.request(sourcecomp, null,{render: renderWhileActiveclientsRecord});
-    if (doRefresh) {
-		console.log('Will do another ajax request after a timeout in order to render: pz2watch:activeclientsFieldRecord');  
-	    renderOnRecordTargetsReqVar=setTimeout(
-	     function() {              
-	       console.log('Making request for pz2watch:activeclientsFieldRecord');
-	       jsf.ajax.request(sourcecomp, null,{render: "pz2watch:activeclientsFieldRecord"});       
-	     }
-	     ,1000);
+}
+
+// Listens for browser initiated changes to 'window.location.hash' and sends the
+// hash
+// changes to the back-end (to have the back-end pull up a previous Pazpar2
+// state)
+function windowlocationhashListener() {
+  if (trackHistory) {
+    // console.log("browser hash update detected");
+    var stateKey = document.getElementById("pz2watch:windowlocationhash");
+    if (window.location.hash != stateKey.value) {
+      // console.log("updating stateKey with new browser hash: " +
+      // window.location.hash);
+      stateKey.value = window.location.hash;
+      if (!stateKey.value)
+        window.location.hash = '#1';
+      stateKey.onchange();
     } else {
-    	//console.log("No further updates from server requested");
+      // console.log("State hash already has the value of the new browser hash -
+      // not updating state hash");
     }
   }
+}
 
-  // Listens for browser initiated changes to 'window.location.hash' and sends the hash
-  // changes to the back-end (to have the back-end pull up a previous Pazpar2 state)
-  function windowlocationhashListener () {
-	  if (trackHistory) {
-	      //console.log("browser hash update detected");
-	      var stateKey = document.getElementById("pz2watch:windowlocationhash");
-	      if (window.location.hash != stateKey.value) {
-	        //console.log("updating stateKey with new browser hash: " + window.location.hash);
-	        stateKey.value = window.location.hash;
-	        if (! stateKey.value) window.location.hash = '#1';
-	        stateKey.onchange();
-	      } else {
-	        //console.log("State hash already has the value of the new browser hash - not updating state hash");
-	      }    	  
-	  }	  
+// Listens for ViewExpiredException message. Reloads the current page, stripped
+// of
+// it's jsessionid and hash content
+function viewExpirationListener(data) {
+  if (data.status === "success" && data.responseXML) {
+    var errorElements = data.responseXML.getElementsByTagName("error-name");
+    if (errorElements.length > 0) {
+      var errorname = errorElements.item(0).textContent
+          || errorElements.item(0).text;
+      if (errorname === "class javax.faces.application.ViewExpiredException") {
+        var newloc = window.location.protocol + "//" + window.location.host
+            + window.location.pathname.replace(/;jsessionid.*/, '');
+        alert('Sorry, this session has expired. A new one will be loaded.');
+        window.location.replace(newloc);
+      }
+    }
   }
-  
-  // Listens for ViewExpiredException message. Reloads the current page, stripped of
-  // it's jsessionid and hash content
-  function viewExpirationListener (data) {
-	  if (data.status === "success" && data.responseXML) {  
-		  var errorElements = data.responseXML.getElementsByTagName("error-name");
-		  if (errorElements.length>0) {
-			  var errorname = errorElements.item(0).textContent || errorElements.item(0).text;
-			  if (errorname === "class javax.faces.application.ViewExpiredException") {
-				  var newloc = window.location.protocol + "//" + window.location.host + window.location.pathname.replace(/;jsessionid.*/,'');
-				  alert('Sorry, this session has expired. A new one will be loaded.');
-				  window.location.replace(newloc);
-			  }			  
-		  }
-	  }
-	  
+
+}
+
+function errorListener(data) {
+  // alert(data.toSource());
+  if (data.source.name === "pz2watch:activeclientsField") {
+    alert("This occurred when polling: ["
+        + data.description
+        + "]. The page could be in an inconsistent state after this. We apologize for the inconvenience.");
+  } else {
+    var pattern = /viewId.*could not be restored./;
+    if (pattern.test(data.description)) {
+      // ignore - caught by view expiration listener
+    } else {
+      alert("An error ["
+          + data.description
+          + "] was triggered by ["
+          + data.source.name
+          + "]. The page could be in an inconsistent state after this. We apologize for the inconvenience.");
+    }
   }
+}
 
-  // Composite listener, invoking all field update listeners
-  function fieldUpdateListener (data) {
-	  if (data.status === "success") {
-		var updates = data.responseXML.getElementsByTagName("update");
-		for (var i=0, max=updates.length; i<max; i++) {
-			var lsnri = fieldListeners.getListener(updates[i].getAttribute("id"));
-			if (lsnri) {
-				lsnri.invoke(updates[i]);
-			}
-		}
-	  } 
+// Composite listener, invoking all field update listeners
+function fieldUpdateListener(data) {
+  if (data.status === "success") {
+    var updates = data.responseXML.getElementsByTagName("update");
+    for ( var i = 0, max = updates.length; i < max; i++) {
+      var lsnri = fieldListeners.getListener(updates[i].getAttribute("id"));
+      if (lsnri) {
+        lsnri.invoke(updates[i]);
+      }
+    }
   }
-        
-  var Pz2listeners = function () {
-	var lsnrs = {};
-	this.addListener = function (key, lsnr) {
-		lsnrs[key] =lsnr;
-	};
-	this.getListener = function (key) {
-		return lsnrs[key];
-	};
+}
+
+var Pz2listeners = function() {
+  var lsnrs = {};
+  this.addListener = function(key, lsnr) {
+    lsnrs[key] = lsnr;
   };
+  this.getListener = function(key) {
+    return lsnrs[key];
+  };
+};
 
-  var fieldListeners = new Pz2listeners();
+var fieldListeners = new Pz2listeners();
 
-  // Listens for back-end initiated changes to the state key and updates
-  // window.location.hash with changes, to record them in browsing history
-  var StateListener = function () {
-	this.invoke = function (field) {
-      var stateKeyDoc = StringtoXML(field.textContent || field.text);
-      var stateKeyValue = stateKeyDoc.childNodes[0].getAttribute("value");
-      //console.log('Application hash update detected. New value: ' + stateKeyValue);
-      if (stateKeyValue !== window.location.hash) {
-        window.location.hash = stateKeyValue;
-        //console.log("Browsers hash updated accordingly.");
-      } else {
-        //console.log("Browsers hash already has the value of the state hash. Not updating browser hash."); 
-      }
-	};
+// Listens for back-end initiated changes to the state key and updates
+// window.location.hash with changes, to record them in browsing history
+var StateListener = function() {
+  this.invoke = function(field) {
+    var stateKeyDoc = StringtoXML(field.textContent || field.text);
+    var stateKeyValue = stateKeyDoc.childNodes[0].getAttribute("value");
+    // console.log('Application hash update detected. New value: ' +
+    // stateKeyValue);
+    if (stateKeyValue !== window.location.hash) {
+      window.location.hash = stateKeyValue;
+      // console.log("Browsers hash updated accordingly.");
+    } else {
+      // console.log("Browsers hash already has the value of the state hash. Not
+      // updating browser hash.");
+    }
   };
-  
-  // Listens for updates to general 'activeclients' field, then invokes renderTargets
-  var ActiveclientsListener = function () {
-    this.invoke = function (field) {
-      var updateDoc = StringtoXML(field.textContent || field.text);
-      var activeClientsValue = (updateDoc.childNodes[0].textContent || updateDoc.childNodes[0].text);
-      //console.log('Activeclients response detected: ' + activeClientsValue);
-      clearTimeout(renderTargetsReqVar);
-      if (activeClientsValue > '0') {
-        renderTargets(true);
-      } else {
-    	renderTargets(false);
-      }
-	};
+};
+
+// Listens for updates to general 'activeclients' field, then invokes
+// renderTargets
+var ActiveclientsListener = function() {
+  this.invoke = function(field) {
+    var updateDoc = StringtoXML(field.textContent || field.text);
+    var activeClientsValue = (updateDoc.childNodes[0].textContent || updateDoc.childNodes[0].text);
+    // console.log('Activeclients response detected: ' + activeClientsValue);
+    clearTimeout(renderTargetsReqVar);
+    if (activeClientsValue > '0') {
+      renderTargets(true);
+    } else {
+      renderTargets(false);
+    }
   };
-  
-  // Listens for updates to record 'activeclients' field, then invokes renderOnRecordTargets
-  var ActiveclientsRecordListener = function () {
-	    this.invoke = function (field) {
-	      var updateDoc = StringtoXML(field.textContent || field.text);
-	      var activeClientsRecordValue = (updateDoc.childNodes[0].textContent || updateDoc.childNodes[0].text);
-	      console.log('Activeclients response for record detected: ' + activeClientsRecordValue);
-	      clearTimeout(renderOnRecordTargetsReqVar);
-	      if (activeClientsRecordValue > '0') {
-	        renderOnRecordTargets(true);
-	      } else {
-	    	console.log('Active clients is 0, final rendering');
-	    	renderOnRecordTargets(false);
-	      }
-		};
-	  };
+};
 
-    
-  // Inserts field update listeners, state listeners, view expired listener
-  // into Ajax response handling 	  
-  jsf.ajax.addOnEvent(fieldUpdateListener);
-  jsf.ajax.addOnEvent(viewExpirationListener);
-  
-  function StringtoXML(text){
-		var doc;
-	    if (window.ActiveXObject){
-	      doc=new ActiveXObject('Microsoft.XMLDOM');
-	      doc.async=false;
-	      doc.loadXML(text);
-	    } else {
-	      var parser=new DOMParser();
-	      doc=parser.parseFromString(text,'text/xml');
-	    }
-	    return doc;
+// Listens for updates to record 'activeclients' field, then invokes
+// renderOnRecordTargets
+var ActiveclientsRecordListener = function() {
+  this.invoke = function(field) {
+    var updateDoc = StringtoXML(field.textContent || field.text);
+    var activeClientsRecordValue = (updateDoc.childNodes[0].textContent || updateDoc.childNodes[0].text);
+    console.log('Activeclients response for record detected: '
+        + activeClientsRecordValue);
+    clearTimeout(renderOnRecordTargetsReqVar);
+    if (activeClientsRecordValue > '0') {
+      renderOnRecordTargets(true);
+    } else {
+      console.log('Active clients is 0, final rendering');
+      renderOnRecordTargets(false);
+    }
+  };
+};
+
+// Inserts field update listeners, state listeners, view expired listener
+// into Ajax response handling
+jsf.ajax.addOnEvent(fieldUpdateListener);
+jsf.ajax.addOnEvent(viewExpirationListener);
+jsf.ajax.addOnError(errorListener);
+
+function StringtoXML(text) {
+  var doc;
+  if (window.ActiveXObject) {
+    doc = new ActiveXObject('Microsoft.XMLDOM');
+    doc.async = false;
+    doc.loadXML(text);
+  } else {
+    var parser = new DOMParser();
+    doc = parser.parseFromString(text, 'text/xml');
   }
+  return doc;
+}
 
-  // Sets up field update listeners
-  var setUpListeners = function () {
-    //console.log("Starts tracking activeclientsField, for 'show' and 'record'");
-    fieldListeners.addListener("pz2watch:activeclientsField", new ActiveclientsListener());
-    fieldListeners.addListener("pz2watch:activeclientsFieldRecord", new ActiveclientsRecordListener());
-    if (trackHistory) {
-        //console.log("Starts tracking windowlocationhash field");
-        fieldListeners.addListener("pz2watch:windowlocationhash", new StateListener());
-        //console.log("Setting listener for browser onhashchange");
-        window.onload = window.onhashchange = windowlocationhashListener;
-    }
-  };
\ No newline at end of file
+// Sets up field update listeners
+var setUpListeners = function() {
+  // console.log("Starts tracking activeclientsField, for 'show' and 'record'");
+  fieldListeners.addListener("pz2watch:activeclientsField",
+      new ActiveclientsListener());
+  fieldListeners.addListener("pz2watch:activeclientsFieldRecord",
+      new ActiveclientsRecordListener());
+  if (trackHistory) {
+    // console.log("Starts tracking windowlocationhash field");
+    fieldListeners.addListener("pz2watch:windowlocationhash",
+        new StateListener());
+    // console.log("Setting listener for browser onhashchange");
+    window.onload = window.onhashchange = windowlocationhashListener;
+  }
+};
\ No newline at end of file
-- 
1.7.10.4