chore: merge blocksuite source code (#9213)

blocksuite/affine/shared/src/utils/insert.ts

@@ -0,0 +1,51 @@
+export type InsertToPosition =
+  | 'end'
+  | 'start'
+  | {
+      id: string;
+      before: boolean;
+    };
+
+export function insertPositionToIndex<
+  T extends {
+    id: string;
+  },
+>(position: InsertToPosition, arr: T[]): number;
+export function insertPositionToIndex<T>(
+  position: InsertToPosition,
+  arr: T[],
+  key: (value: T) => string
+): number;
+export function insertPositionToIndex<T>(
+  position: InsertToPosition,
+  arr: T[],
+
+  key: (value: T) => string = (value: any) => value.id
+): number {
+  if (typeof position === 'object') {
+    const index = arr.findIndex(v => key(v) === position.id);
+    return index + (position.before ? 0 : 1);
+  }
+  if (position == null || position === 'start') {
+    return 0;
+  }
+  if (position === 'end') {
+    return arr.length;
+  }
+  return arr.findIndex(v => key(v) === position) + 1;
+}
+export const arrayMove = <T>(
+  arr: T[],
+  from: (t: T) => boolean,
+  to: (arr: T[]) => number
+): T[] => {
+  const columnIndex = arr.findIndex(v => from(v));
+  if (columnIndex < 0) {
+    return arr;
+  }
+  const newArr = [...arr];
+  const [ele] = newArr.splice(columnIndex, 1);
+  const index = to(newArr);
+  newArr.splice(index, 0, ele);
+  return newArr;
+};