feat: raw boards dnd

src/utils/lexorank.ts

@@ -0,0 +1,36 @@
+import { LexoRank } from "lexorank";
+
+type LexorankSortable = {
+    rank: string;
+};
+
+export function compareByLexorank<T extends LexorankSortable>(
+    a: T,
+    b: T
+): -1 | 1 | 0 {
+    if (a.rank < b.rank) {
+        return -1;
+    }
+    if (a.rank > b.rank) {
+        return 1;
+    }
+    return 0;
+}
+
+export function sortByLexorank<T extends LexorankSortable>(items: T[]): T[] {
+    return items.sort(compareByLexorank);
+}
+
+export function getNewLexorank(
+    left?: LexoRank | null,
+    right?: LexoRank | null
+): LexoRank {
+    if (right) {
+        if (left) return left?.between(right);
+        return right.genPrev();
+    }
+    if (left) {
+        return left.genNext();
+    }
+    return LexoRank.middle();
+}