Improved photo view for holes in history

app/js/services.js

@@ -684,10 +684,12 @@ angular.module('myApp.services', [])
   var sendFilePromise = $q.when();
   var tempID = -1;
 
-
   var dialogsIndex = SearchIndexManager.createIndex(),
       cachedResults = {query: false};
 
+  var lastSearchFilter = {},
+      lastSearchResults = [];
+
   NotificationsManager.start();
 
   function getDialogs (query, maxID, limit) {
@@ -888,7 +890,14 @@ angular.module('myApp.services', [])
   }
 
   function getSearch (inputPeer, query, inputFilter, maxID, limit) {
-    var foundMsgs = [];
+    var foundMsgs = [],
+        useSearchCache = !query,
+        sameSearchCache = useSearchCache && angular.equals(lastSearchFilter, inputFilter);
+
+    if (useSearchCache && !sameSearchCache) {
+      lastSearchFilter = inputFilter;
+      lastSearchResults = [];
+    }
 
     if (!maxID && !query) {
       var peerID = AppPeersManager.getPeerID(inputPeer),
@@ -927,9 +936,27 @@ angular.module('myApp.services', [])
           }
         }
       }
+
+      // console.log(dT(), sameSearchCache, foundMsgs, lastSearchResults);
+      if (foundMsgs.length < neededLimit && lastSearchResults.length && sameSearchCache) {
+        var minID = foundMsgs.length ? foundMsgs[foundMsgs.length - 1] : 0xFFFFFFFF;
+        for (var i = 0; i < lastSearchResults.length; i++) {
+          if (lastSearchResults[i] < minID) {
+            foundMsgs.push(lastSearchResults[i]);
+            if (foundMsgs.length >= neededLimit) {
+              break;
+            }
+          }
+        }
+      }
+      // console.log(dT(), foundMsgs);
     }
 
     if (foundMsgs.length || limit == 1000) {
+      if (useSearchCache) {
+        lastSearchResults = listMergeSorted(lastSearchResults, foundMsgs);
+      }
+
       return $q.when({
         count: null,
         history: foundMsgs
@@ -958,6 +985,10 @@ angular.module('myApp.services', [])
         foundMsgs.push(message.id);
       });
 
+      if (useSearchCache) {
+        lastSearchResults = listMergeSorted(lastSearchResults, foundMsgs);
+      }
+
       return {
         count: foundCount,
         history: foundMsgs

app/js/util.js

@@ -77,3 +77,33 @@ function safeReplaceObject (wasObject, newObject) {
   }
 }
 
+function listMergeSorted (list1, list2) {
+  list1 = list1 || [];
+  list2 = list2 || [];
+
+  var result = angular.copy(list1);
+
+  var minID = list1.length ? list1[list1.length - 1] : 0xFFFFFFFF;
+  for (var i = 0; i < list2.length; i++) {
+    if (list2[i] < minID) {
+      result.push(list2[i]);
+    }
+  }
+
+  return result;
+}
+
+function listUniqSorted (list) {
+  list = list || [];
+  var resultList = [],
+      prev = false;
+  for (var i = 0; i < list.length; i++) {
+    if (list[i] !== prev) {
+      resultList.push(list[i])
+    }
+    prev = list[i];
+  }
+
+  return resultList;
+}
+