re-order and refactor methods

npm/ng-packs/packages/core/src/lib/services/routes.service.ts

@@ -52,31 +52,16 @@ export abstract class AbstractTreeService<T extends { [key: string | number | sy
     return this._visible$.asObservable();
   }
 
-  protected createTree(items: T[]): TreeNode<T>[] {
-    return createTreeFromList<T, TreeNode<T>>(
-      items,
-      item => item[this.id],
-      item => item[this.parentId],
-      item => BaseTreeNode.create(item),
-    );
-  }
-
-  protected createGroupedTree(list: TreeNode<T>[]): RouteGroup<T>[] | undefined {
-    const map = createGroupMap<T>(list, this.othersGroup);
-    if (!map) {
-      return undefined;
-    }
-
-    return Array.from(map, ([key, items]) => ({ group: key, items }));
-  }
-
   private filterWith(setOrMap: Set<string> | Map<string, T>): T[] {
     return this._flat$.value.filter(item => !setOrMap.has(item[this.id]));
   }
 
   private findItemsToRemove(set: Set<string>): Set<string> {
     return this._flat$.value.reduce((acc, item) => {
-      if (!acc.has(item[this.parentId])) return acc;
+      if (!acc.has(item[this.parentId])) {
+        return acc;
+      }
+
       const childSet = new Set([item[this.id]]);
       const children = this.findItemsToRemove(childSet);
       return new Set([...acc, ...children]);
@@ -90,6 +75,24 @@ export abstract class AbstractTreeService<T extends { [key: string | number | sy
     return flatItems;
   }
 
+  protected createTree(items: T[]): TreeNode<T>[] {
+    return createTreeFromList<T, TreeNode<T>>(
+      items,
+      item => item[this.id],
+      item => item[this.parentId],
+      item => BaseTreeNode.create(item),
+    );
+  }
+
+  protected createGroupedTree(list: TreeNode<T>[]): RouteGroup<T>[] | undefined {
+    const map = createGroupMap<T>(list, this.othersGroup);
+    if (!map) {
+      return undefined;
+    }
+
+    return Array.from(map, ([key, items]) => ({ group: key, items }));
+  }
+
   add(items: T[]): T[] {
     if (this.filterRoutesEnabled) {
       const map = new Map<string, T>();
@@ -137,17 +140,26 @@ export abstract class AbstractTreeService<T extends { [key: string | number | sy
     this.filterRoutesEnabled = true;
   }
 
-  find(predicate: (item: TreeNode<T>) => boolean, tree = this.tree): TreeNode<T> | null {
+ find(predicate: (item: TreeNode<T>) => boolean, tree = this.tree): TreeNode<T> | null {
-    return tree.reduce<TreeNode<T> | null>(
+    return tree.reduce<TreeNode<T> | null>((acc, node) => {
-      (acc, node) => (acc ? acc : predicate(node) ? node : this.find(predicate, node.children)),
+      if (acc) {
-      null,
+        return acc;
-    );
+      }
+
+      if (predicate(node)) {
+        return node;
+      }
+
+      return this.find(predicate, node.children);
+    }, null);
   }
 
   patch(identifier: string, props: Partial<T>): T[] | false {
     const flatItems = this._flat$.value;
     const index = flatItems.findIndex(item => item[this.id] === identifier);
-    if (index < 0) return false;
+    if (index < 0) {
+      return false;
+    }
 
     flatItems[index] = { ...flatItems[index], ...props };
 
@@ -171,15 +183,17 @@ export abstract class AbstractTreeService<T extends { [key: string | number | sy
   search(params: Partial<T>, tree = this.tree): TreeNode<T> | null {
     const searchKeys = Object.keys(params) as Array<keyof Partial<T>>;
 
-    return tree.reduce<TreeNode<T> | null>(
+    return tree.reduce<TreeNode<T> | null>((acc, node) => {
-      (acc, node) =>
+      if (acc) {
-        acc
+        return acc;
-          ? acc
+      }
-          : searchKeys.every(key => node[key] === params[key])
+
-            ? node
+      if (searchKeys.every(key => node.item[key] === params[key])) {
-            : this.search(params, node.children),
+        return node;
-      null,
+      }
-    );
+
+      return this.search(params, node.children);
+    }, null);
   }
 }