prisma-extension-pagination/dist/cursor.js

Prisma Client extension for pagination

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.paginateWithCursor = paginateWithCursor;
const helpers_1 = require("./helpers");
async function paginateWithCursor(model, query, { after, before, getCursor, parseCursor, limit, }) {
    let results;
    let hasPreviousPage = false;
    let hasNextPage = false;
    if (typeof before === 'string') {
        const cursor = parseCursor(before);
        let nextResult;
        [results, nextResult] = await Promise.all([
            model.findMany({
                ...query,
                cursor,
                skip: 1,
                take: limit === null ? undefined : -limit - 1,
            }),
            model.findMany({
                ...query,
                ...helpers_1.resetSelection,
                cursor,
                take: 1,
            }),
        ]);
        if (limit !== null && results.length > limit) {
            hasPreviousPage = Boolean(results.shift());
        }
        hasNextPage = Boolean(nextResult.length);
    }
    else if (typeof after === 'string') {
        const cursor = parseCursor(after);
        let previousResult;
        [results, previousResult] = await Promise.all([
            model.findMany({
                ...query,
                cursor,
                skip: 1,
                take: limit === null ? undefined : limit + 1,
            }),
            model.findMany({
                ...query,
                ...helpers_1.resetSelection,
                cursor,
                take: -1,
            }),
        ]);
        hasPreviousPage = Boolean(previousResult.length);
        if (limit !== null && results.length > limit) {
            hasNextPage = Boolean(results.pop());
        }
    }
    else {
        results = await model.findMany({
            ...query,
            take: limit === null ? undefined : limit + 1,
        });
        hasPreviousPage = false;
        if (limit !== null && results.length > limit) {
            hasNextPage = Boolean(results.pop());
        }
    }
    const startCursor = results.length ? getCursor(results[0]) : null;
    const endCursor = results.length
        ? getCursor(results[results.length - 1])
        : null;
    return [
        results,
        {
            hasNextPage,
            hasPreviousPage,
            startCursor,
            endCursor,
        },
    ];
}