feat: rest revamp (#2918)

Co-authored-by: Liyas Thomas <liyascthomas@gmail.com>
Co-authored-by: Nivedin <53208152+nivedin@users.noreply.github.com>
Co-authored-by: Andrew Bastin <andrewbastin.k@gmail.com>

packages/hoppscotch-common/src/helpers/collection/affectedIndex.ts

@@ -0,0 +1,21 @@
+/**
+ * Get the indexes that are affected by the reorder
+ * @param from index of the item before reorder
+ * @param to index of the item after reorder
+ * @returns Map of from to to
+ */
+
+export function getAffectedIndexes(from: number, to: number) {
+  const indexes = new Map<number, number>()
+  indexes.set(from, to)
+  if (from < to) {
+    for (let i = from + 1; i <= to; i++) {
+      indexes.set(i, i - 1)
+    }
+  } else {
+    for (let i = from - 1; i >= to; i--) {
+      indexes.set(i, i + 1)
+    }
+  }
+  return indexes
+}