Fixed 2 bugs with map loading and sending

When a map was sent the receiver didn't save the resolutions tihs meant that if the original map owner left or wasn't the party leader the map would be blank when new users joined. Also if a map sender left when sending a map and rejoined their version of the map would be overriden by a corrupted version.

src/components/map/MapInteraction.js

@@ -31,13 +31,15 @@ function MapInteraction({
   disabledControls,
 }) {
   let mapSourceMap = map;
-  if (map && map.type === "file") {
-    if (
-      map.resolutions &&
-      map.quality !== "original" &&
-      map.resolutions[map.quality]
-    ) {
+  if (map && map.type === "file" && map.resolutions) {
+    // Set to the quality if available
+    if (map.quality !== "original" && map.resolutions[map.quality]) {
       mapSourceMap = map.resolutions[map.quality];
+    } else if (!map.file) {
+      // If no file fallback to the highest resolution
+      for (let resolution in map.resolutions) {
+        mapSourceMap = map.resolutions[resolution];
+      }
     }
   }
 

src/contexts/MapDataContext.js

@@ -147,6 +147,10 @@ export function MapDataProvider({ children }) {
     return maps.find((map) => map.id === mapId);
   }
 
+  async function getMapFromDB(mapId) {
+    return await database.table("maps").get(mapId);
+  }
+
   const ownedMaps = maps.filter((map) => map.owner === userId);
 
   const value = {
@@ -160,6 +164,7 @@ export function MapDataProvider({ children }) {
     updateMapState,
     putMap,
     getMap,
+    getMapFromDB,
   };
   return (
     <MapDataContext.Provider value={value}>{children}</MapDataContext.Provider>

src/network/NetworkedMapAndTokens.js

@@ -33,7 +33,7 @@ function NetworkedMapAndTokens({ session }) {
   } = useContext(MapLoadingContext);
 
   const { putToken, getToken } = useContext(TokenDataContext);
-  const { putMap, getMap } = useContext(MapDataContext);
+  const { putMap, updateMap, getMapFromDB } = useContext(MapDataContext);
 
   const [currentMap, setCurrentMap] = useState(null);
   const [currentMapState, setCurrentMapState] = useState(null);
@@ -243,11 +243,13 @@ function NetworkedMapAndTokens({ session }) {
       if (id === "map") {
         const newMap = data;
         if (newMap && newMap.type === "file") {
-          const cachedMap = getMap(newMap.id);
-          if (cachedMap && cachedMap.lastModified === newMap.lastModified) {
+          const cachedMap = await getMapFromDB(newMap.id);
+          if (cachedMap && cachedMap.lastModified >= newMap.lastModified) {
             setCurrentMap(cachedMap);
           } else {
-            await putMap(newMap);
+            // Save map data but remove last modified so if there is an error
+            // during the map request the cache is invalid
+            await putMap({ ...newMap, lastModified: 0 });
             reply("mapRequest", newMap.id, "map");
           }
         } else {
@@ -255,17 +257,29 @@ function NetworkedMapAndTokens({ session }) {
         }
       }
       if (id === "mapRequest") {
-        const map = getMap(data);
+        const map = await getMapFromDB(data);
 
-        function replyWithFile(file, preview) {
+        function replyWithPreview(preview) {
+          if (map.resolutions[preview]) {
             reply(
               "mapResponse",
               {
-              ...map,
+                id: map.id,
+                resolutions: { [preview]: map.resolutions[preview] },
+              },
+              "map"
+            );
+          }
+        }
+
+        function replyWithFile(file) {
+          reply(
+            "mapResponse",
+            {
+              id: map.id,
               file,
-              resolutions: {},
-              // If preview don't send the last modified so that it will not be cached
-              lastModified: preview ? 0 : map.lastModified,
+              // Add last modified back to file to set cache as valid
+              lastModified: map.lastModified,
             },
             "map"
           );
@@ -273,35 +287,36 @@ function NetworkedMapAndTokens({ session }) {
 
         switch (map.quality) {
           case "low":
-            replyWithFile(map.resolutions.low.file, false);
+            replyWithFile(map.resolutions.low.file);
             break;
           case "medium":
-            replyWithFile(map.resolutions.low.file, true);
-            replyWithFile(map.resolutions.medium.file, false);
+            replyWithPreview("low");
+            replyWithFile(map.resolutions.medium.file);
             break;
           case "high":
-            replyWithFile(map.resolutions.medium.file, true);
-            replyWithFile(map.resolutions.high.file, false);
+            replyWithPreview("medium");
+            replyWithFile(map.resolutions.high.file);
             break;
           case "ultra":
-            replyWithFile(map.resolutions.medium.file, true);
-            replyWithFile(map.resolutions.ultra.file, false);
+            replyWithPreview("medium");
+            replyWithFile(map.resolutions.ultra.file);
             break;
           case "original":
             if (map.resolutions.medium) {
-              replyWithFile(map.resolutions.medium.file, true);
+              replyWithPreview("medium");
             } else if (map.resolutions.low) {
-              replyWithFile(map.resolutions.low.file, true);
+              replyWithPreview("low");
             }
-            replyWithFile(map.file, false);
+            replyWithFile(map.file);
             break;
           default:
-            replyWithFile(map.file, false);
+            replyWithFile(map.file);
         }
       }
       if (id === "mapResponse") {
-        await putMap(data);
-        setCurrentMap(data);
+        await updateMap(data.id, data);
+        const newMap = await getMapFromDB(data.id);
+        setCurrentMap(newMap);
       }
       if (id === "mapState") {
         setCurrentMapState(data);