fix(Scanner): Fix move stability

Signed-off-by: Marcel Klehr <[email protected]>

Author: marcelklehr

src/lib/Scanner.ts

@@ -159,7 +159,7 @@ export default class Scanner<L1 extends TItemLocation, L2 extends TItemLocation>
           await Promise.resolve()
           const removedItem = removeAction.payload
 
-          if (this.mergeable(removedItem, createdItem)) {
+          if (this.mergeable(removedItem, createdItem) && (removedItem.type !== 'folder' || removedItem.childrenSimilarity(createdItem) > 0.8)) {
             this.result.CREATE.retract(createAction)
             this.result.REMOVE.retract(removeAction)
             this.result.MOVE.commit({
@@ -222,7 +222,7 @@ export default class Scanner<L1 extends TItemLocation, L2 extends TItemLocation>
             const newItem = createdItem.findItemFilter(
               removedItem.type,
               item => this.mergeable(removedItem, item),
-              item => item.childrenSimilarity(createdItem)
+              item => item.childrenSimilarity(removedItem)
             )
             let index
             if (newItem) {

src/lib/Tree.ts

@@ -266,7 +266,7 @@ export class Folder<L extends TItemLocation> {
     if (otherItem instanceof Folder) {
       return this.children.reduce(
         (count, item) =>
-          otherItem.children.filter(i => i.title === item.title).length > 0 ? count + 1 : count,
+          otherItem.children.find(i => i.title === item.title) ? count + 1 : count,
         0
       ) / Math.max(this.children.length, otherItem.children.length)
     }