refactor: separation of shared components

src/components/dnd/SortableDnd/DragHandle.tsx

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+import React, { CSSProperties, ReactNode, useContext } from "react";
+import SortableItemContext from "@/components/dnd/SortableDnd/SortableItemContext";
+
+type Props = {
+    children: ReactNode;
+    style?: CSSProperties;
+};
+
+const DragHandle = ({ children, style }: Props) => {
+    const { attributes, listeners, ref } = useContext(SortableItemContext);
+
+    return (
+        <div
+            {...attributes}
+            {...listeners}
+            style={{
+                width: "100%",
+                cursor: "grab",
+                ...style,
+            }}
+            ref={ref}>
+            {children}
+        </div>
+    );
+};
+
+export default DragHandle;

src/components/dnd/SortableDnd/SortableDnd.tsx

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+"use client";
+
+import React, {
+    CSSProperties,
+    ReactNode,
+    useEffect,
+    useMemo,
+    useState,
+} from "react";
+import { Active, DndContext, DragEndEvent } from "@dnd-kit/core";
+import { SortableContext } from "@dnd-kit/sortable";
+import { LexoRank } from "lexorank";
+import { Box, Group } from "@mantine/core";
+import useDndSensors from "@/app/deals/hooks/useSensors";
+import { SortableItem } from "@/components/dnd/SortableDnd/SortableItem";
+import { SortableOverlay } from "@/components/dnd/SortableDnd/SortableOverlay";
+import { getNewLexorank, sortByLexorank } from "@/utils/lexorank";
+
+type BaseItem = {
+    id: number;
+    lexorank: string;
+};
+
+type Props<T extends BaseItem> = {
+    initialItems: T[];
+    renderItem: (item: T) => ReactNode;
+    onDragEnd: (itemId: number, newLexorank: string) => void;
+    onItemClick: (item: T) => void;
+    rowStyle?: CSSProperties;
+    itemStyle?: CSSProperties;
+};
+
+const SortableDnd = <T extends BaseItem>({
+    initialItems,
+    renderItem,
+    onDragEnd,
+    onItemClick,
+    rowStyle,
+    itemStyle,
+}: Props<T>) => {
+    const [active, setActive] = useState<Active | null>(null);
+    const [items, setItems] = useState<T[]>([]);
+    const activeItem = useMemo(
+        () => initialItems.find(item => item.id === active?.id),
+        [active, items]
+    );
+
+    useEffect(() => {
+        setItems(sortByLexorank(initialItems));
+    }, [initialItems]);
+
+    const sensors = useDndSensors();
+
+    const onDragEndLocal = ({ active, over }: DragEndEvent) => {
+        if (over && active.id !== over?.id && activeItem) {
+            const overIndex: number = items.findIndex(
+                ({ id }) => id === over.id
+            );
+            const activeIndex: number = items.findIndex(
+                ({ id }) => id === activeItem.id
+            );
+
+            let leftIndex = overIndex;
+            let rightIndex = overIndex + 1;
+            if (overIndex < activeIndex) {
+                leftIndex = overIndex - 1;
+                rightIndex = overIndex;
+            }
+
+            const leftLexorank: LexoRank | null =
+                leftIndex >= 0
+                    ? LexoRank.parse(items[leftIndex].lexorank)
+                    : null;
+            const rightLexorank: LexoRank | null =
+                rightIndex < items.length
+                    ? LexoRank.parse(items[rightIndex].lexorank)
+                    : null;
+
+            const newLexorank = getNewLexorank(
+                leftLexorank,
+                rightLexorank
+            ).toString();
+
+            items[activeIndex].lexorank = newLexorank;
+            onDragEnd(items[activeIndex].id, newLexorank);
+            const sortedItems = sortByLexorank(items);
+            setItems([...sortedItems]);
+        }
+        setActive(null);
+    };
+
+    return (
+        <DndContext
+            sensors={sensors}
+            onDragStart={({ active }) => setActive(active)}
+            onDragEnd={onDragEndLocal}
+            onDragCancel={() => setActive(null)}>
+            <SortableContext items={items}>
+                <Group
+                    gap={0}
+                    style={rowStyle}
+                    role="application">
+                    {items.map((item, index) => (
+                        <Box
+                            key={index}
+                            onClick={e => {
+                                e.preventDefault();
+                                e.stopPropagation();
+                                onItemClick(item);
+                            }}>
+                            <SortableItem
+                                dragHandleStyle={{ cursor: "pointer" }}
+                                itemStyle={itemStyle}
+                                id={item.id}>
+                                {renderItem(item)}
+                            </SortableItem>
+                        </Box>
+                    ))}
+                </Group>
+            </SortableContext>
+            <SortableOverlay>
+                <div style={{ cursor: "grabbing" }}>
+                    {activeItem ? renderItem(activeItem) : null}
+                </div>
+            </SortableOverlay>
+        </DndContext>
+    );
+};
+
+export default SortableDnd;

src/components/dnd/SortableDnd/SortableItem.tsx

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+import React, { CSSProperties, PropsWithChildren, useMemo } from "react";
+import { useSortable } from "@dnd-kit/sortable";
+import { CSS } from "@dnd-kit/utilities";
+import DragHandle from "@/components/dnd/SortableDnd/DragHandle";
+import SortableItemContext from "./SortableItemContext";
+
+type Props = {
+    id: number | string;
+    itemStyle?: CSSProperties;
+    dragHandleStyle?: CSSProperties;
+};
+
+export const SortableItem = ({
+    children,
+    itemStyle,
+    id,
+    dragHandleStyle,
+}: PropsWithChildren<Props>) => {
+    const {
+        attributes,
+        isDragging,
+        listeners,
+        setNodeRef,
+        setActivatorNodeRef,
+        transform,
+        transition,
+    } = useSortable({ id });
+
+    const context = useMemo(
+        () => ({
+            attributes,
+            listeners,
+            ref: setActivatorNodeRef,
+        }),
+        [attributes, listeners, setActivatorNodeRef]
+    );
+
+    const style: CSSProperties = {
+        opacity: isDragging ? 0.4 : undefined,
+        transform: CSS.Translate.toString(transform),
+        transition,
+        ...itemStyle,
+    };
+
+    return (
+        <SortableItemContext.Provider value={context}>
+            <div
+                ref={setNodeRef}
+                style={style}>
+                <DragHandle style={dragHandleStyle}>{children}</DragHandle>
+            </div>
+        </SortableItemContext.Provider>
+    );
+};

src/components/dnd/SortableDnd/SortableItemContext.tsx

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+import type { DraggableSyntheticListeners } from "@dnd-kit/core";
+import { createContext } from "react";
+
+interface Context {
+    attributes: Record<string, any>;
+    listeners: DraggableSyntheticListeners;
+    ref: (node: HTMLElement | null) => void;
+}
+
+const SortableItemContext = createContext<Context>({
+    attributes: {},
+    listeners: undefined,
+    ref() {},
+});
+
+export default SortableItemContext;

src/components/dnd/SortableDnd/SortableOverlay.tsx

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+import type { PropsWithChildren } from "react";
+import {
+    defaultDropAnimationSideEffects,
+    DragOverlay,
+    DropAnimation,
+} from "@dnd-kit/core";
+
+const dropAnimationConfig: DropAnimation = {
+    sideEffects: defaultDropAnimationSideEffects({
+        styles: {
+            active: {
+                opacity: "0.4",
+            },
+        },
+    }),
+};
+
+export function SortableOverlay({ children }: PropsWithChildren) {
+    return (
+        <DragOverlay dropAnimation={dropAnimationConfig}>
+            {children}
+        </DragOverlay>
+    );
+}

src/components/dnd/SortableDnd/index.ts

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+import SortableDnd from "@/components/dnd/SortableDnd/SortableDnd";
+
+export default SortableDnd;