pal refresh that remembers your place

interface/resources/qml/hifi/Pal.qml

@@ -145,6 +145,22 @@ Rectangle {
         }
         pal.sendToScript({method: 'refreshNearby', params: params});
     }
+    function refreshConnections() {
+        var flickable = connectionsUserModel.flickable;
+        connectionsRefreshScrollTimer.oldY = flickable.contentY;
+        flickable.contentY = 0;
+        connectionsUserModel.getFirstPage('delayRefresh', function () {
+            connectionsRefreshScrollTimer.start();
+        });
+    }
+    Timer {
+        id: connectionsRefreshScrollTimer;
+        interval: 500;
+        property real oldY: 0;
+        onTriggered: {
+            connectionsUserModel.flickable.contentY = oldY;
+        }
+    }
 
     Rectangle {
         id: palTabContainer;
@@ -276,7 +292,10 @@ Rectangle {
                             id: reloadConnections;
                             width: reloadConnections.height;
                             glyph: hifi.glyphs.reload;
-                            onClicked: connectionsUserModel.getFirstPage('delayRefresh');
+                            onClicked: {
+                                pal.sendToScript({method: 'refreshConnections'});
+                                refreshConnections();
+                            }
                         }
                     }
                     // "CONNECTIONS" text
@@ -1209,6 +1228,9 @@ Rectangle {
         case 'clearLocalQMLData':
             ignored = {};
             break;
+        case 'refreshConnections':
+            refreshConnections();
+            break;
         case 'avatarDisconnected':
             var sessionID = message.params[0];
             delete ignored[sessionID];

interface/resources/qml/hifi/models/PSFListModel.qml

@@ -93,7 +93,7 @@ ListModel {
     property int totalPages: 0;
     property int totalEntries: 0;
     // Check consistency and call processPage.
-    function handlePage(error, response) {
+    function handlePage(error, response, cb) {
         var processed;
         console.debug('handlePage', listModelName, additionalFirstPageRequested, error, JSON.stringify(response));
         function fail(message) {
@@ -134,7 +134,9 @@ ListModel {
         if (additionalFirstPageRequested) {
             console.debug('deferred getFirstPage', listModelName);
             additionalFirstPageRequested = false;
-            getFirstPage('delayedClear');
+            getFirstPage('delayedClear', cb);
+        } else if (cb) {
+            cb();
         }
     }
     function debugView(label) {
@@ -147,7 +149,7 @@ ListModel {
 
     // Override either http or getPage.
     property var http; // An Item that has a request function.
-    property var getPage: function () {  // Any override MUST call handlePage(), above, even if results empty.
+    property var getPage: function (cb) {  // Any override MUST call handlePage(), above, even if results empty.
         if (!http) { return console.warn("Neither http nor getPage was set for", listModelName); }
         // If it is a path starting with slash, add the metaverseServer domain.
         var url = /^\//.test(endpoint) ? (Account.metaverseServerURL + endpoint) : endpoint;
@@ -165,12 +167,12 @@ ListModel {
         var parametersSeparator = /\?/.test(url) ? '&' : '?';
         url = url + parametersSeparator + parameters.join('&');
         console.debug('getPage', listModelName, currentPageToRetrieve);
-        http.request({uri: url}, handlePage);
+        http.request({uri: url}, cb ? function (error, result) { handlePage(error, result, cb); } : handlePage);
     }
 
     // Start the show by retrieving data according to `getPage()`.
     // It can be custom-defined by this item's Parent.
-    property var getFirstPage: function (delayClear) {
+    property var getFirstPage: function (delayClear, cb) {
         if (requestPending) {
             console.debug('deferring getFirstPage', listModelName);
             additionalFirstPageRequested = true;
@@ -180,7 +182,7 @@ ListModel {
         resetModel();
         requestPending = true;
         console.debug("getFirstPage", listModelName, currentPageToRetrieve);
-        getPage();
+        getPage(cb);
     }
     property bool additionalFirstPageRequested: false;
     property bool requestPending: false; // For de-bouncing getNextPage.

scripts/system/pal.js

@@ -268,7 +268,6 @@ function fromQml(message) { // messages are {method, params}, like json-rpc. See
         break;
     case 'refreshConnections':
         print('Refreshing Connections...');
-        getConnectionData(false);
         UserActivityLogger.palAction("refresh_connections", "");
         break;
     case 'removeConnection':
@@ -281,7 +280,7 @@ function fromQml(message) { // messages are {method, params}, like json-rpc. See
                 print("Error: unable to remove connection", connectionUserName, error || response.status);
                 return;
             }
-            getConnectionData(false);
+            sendToQml({ method: 'refreshConnections' });
         });
         break;
 
@@ -361,8 +360,9 @@ function getProfilePicture(username, callback) { // callback(url) if successfull
         callback(matched[1]);
     });
 }
+var SAFETY_LIMIT = 600;
 function getAvailableConnections(domain, callback) { // callback([{usename, location}...]) if successfull. (Logs otherwise)
-    var url = METAVERSE_BASE + '/api/v1/users?per_page=400&';
+    var url = METAVERSE_BASE + '/api/v1/users?per_page=' + SAFETY_LIMIT + '&';
     if (domain) {
         url += 'status=' + domain.slice(1, -1); // without curly braces
     } else {
@@ -373,8 +373,10 @@ function getAvailableConnections(domain, callback) { // callback([{usename, loca
     });
 }
 function getInfoAboutUser(specificUsername, callback) {
-    var url = METAVERSE_BASE + '/api/v1/users?filter=connections';
+    var url = METAVERSE_BASE + '/api/v1/users?filter=connections&per_page=' + SAFETY_LIMIT + '&search=' + encodeURIComponent(specificUsername);
     requestJSON(url, function (connectionsData) {
+        // You could have (up to SAFETY_LIMIT connections whose usernames contain the specificUsername.
+        // Search returns all such matches.
         for (user in connectionsData.users) {
             if (connectionsData.users[user].username === specificUsername) {
                 callback(connectionsData.users[user]);
@@ -406,16 +408,14 @@ function getConnectionData(specificUsername, domain) { // Update all the usernam
                 print('Error: Unable to find information about ' + specificUsername + ' in connectionsData!');
             }
         });
-    } else {
+    } else if (domain) {
         getAvailableConnections(domain, function (users) {
-            if (domain) {
-                users.forEach(function (user) {
-                    updateUser(frob(user));
-                });
-            } else {
-                sendToQml({ method: 'connections', params: users.map(frob) });
-            }
+            users.forEach(function (user) {
+                pdateUser(frob(user));
+            });
         });
+    } else {
+        print("Error: unrecognized getConnectionData()");
     }
 }