refactor: refactoring of deals and statuses dnd

src/app/deals/hooks/useGetNewRank.ts

@@ -0,0 +1,78 @@
+import { LexoRank } from "lexorank";
+import { useStatusesContext } from "@/app/deals/contexts/StatusesContext";
+import { DealSchema } from "@/types/DealSchema";
+import { getNewLexorank, sortByLexorank } from "@/utils/lexorank";
+
+const useGetNewRank = () => {
+    const { deals, statuses } = useStatusesContext();
+
+    const getNewRankForSameStatus = (
+        statusDeals: DealSchema[],
+        overDealIndex: number,
+        activeDealId: number
+    ) => {
+        const activeDealIndex = statusDeals.findIndex(
+            deal => deal.id === activeDealId
+        );
+        const [leftIndex, rightIndex] =
+            overDealIndex < activeDealIndex
+                ? [overDealIndex - 1, overDealIndex]
+                : [overDealIndex, overDealIndex + 1];
+
+        const leftLexorank =
+            leftIndex >= 0 ? LexoRank.parse(deals[leftIndex].rank) : null;
+        const rightLexorank =
+            rightIndex < deals.length
+                ? LexoRank.parse(deals[rightIndex].rank)
+                : null;
+
+        return getNewLexorank(leftLexorank, rightLexorank).toString();
+    };
+
+    const getNewRankForAnotherStatus = (
+        statusDeals: DealSchema[],
+        overDealIndex: number
+    ) => {
+        const leftLexorank =
+            overDealIndex > 0
+                ? LexoRank.parse(statusDeals[overDealIndex - 1].rank)
+                : null;
+        const rightLexorank = LexoRank.parse(statusDeals[overDealIndex].rank);
+
+        return getNewLexorank(leftLexorank, rightLexorank).toString();
+    };
+
+    const getNewStatusRank = (activeStatusId: number, overStatusId: number) => {
+        const sortedStatusList = sortByLexorank(statuses);
+        const overIndex = sortedStatusList.findIndex(
+            s => s.id === overStatusId
+        );
+        const activeIndex = sortedStatusList.findIndex(
+            s => s.id === activeStatusId
+        );
+
+        if (overIndex === -1 || activeIndex === -1) return null;
+
+        const [leftIndex, rightIndex] =
+            overIndex < activeIndex
+                ? [overIndex - 1, overIndex]
+                : [overIndex, overIndex + 1];
+
+        const leftLexorank =
+            leftIndex >= 0 ? LexoRank.parse(statuses[leftIndex].rank) : null;
+        const rightLexorank =
+            rightIndex < statuses.length
+                ? LexoRank.parse(statuses[rightIndex].rank)
+                : null;
+
+        return getNewLexorank(leftLexorank, rightLexorank).toString();
+    };
+
+    return {
+        getNewRankForSameStatus,
+        getNewRankForAnotherStatus,
+        getNewStatusRank,
+    };
+};
+
+export default useGetNewRank;