convert manager to ts

Author: ricokahler

src/Manager.ts

@@ -0,0 +1,54 @@
+import { find, sortBy } from 'lodash';
+
+export interface SortableNode extends HTMLElement {
+  sortableInfo: {
+    index: number,
+    collection: string,
+    manager: Manager,
+  };
+}
+
+export default class Manager {
+  refs: { [collection: string]: HTMLElement[] };
+  active: { collection: string, index: number };
+
+  constructor() {
+    this.refs = {};
+  }
+
+  add(collection: string, ref: HTMLElement) {
+    if (!this.refs[collection]) {
+      this.refs[collection] = [];
+    }
+
+    this.refs[collection].push(ref);
+  }
+
+  remove(collection: string, ref: HTMLElement) {
+    const index = this.getIndex(collection, ref);
+
+    if (index !== -1) {
+      this.refs[collection].splice(index, 1);
+    }
+  }
+
+  isActive() {
+    return this.active;
+  }
+
+  getActive() {
+    return find(
+      this.refs[this.active.collection],
+      // eslint-disable-next-line eqeqeq
+      ({ node }: { node: SortableNode }) => node.sortableInfo.index == this.active.index
+    );
+  }
+
+  getIndex(collection: string, ref: HTMLElement) {
+    return this.refs[collection].indexOf(ref);
+  }
+
+  getOrderedRefs(collection = this.active.collection) {
+    return sortBy(this.refs[collection], ({ node }: { node: SortableNode }) => node.sortableInfo.index);
+  }
+}