39 lines
977 B
JavaScript
39 lines
977 B
JavaScript
import httpErrors from 'http-errors';
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var querystring = require('querystring');
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export default function pagination(options) {
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return async function paginationMiddleware(ctx, next) {
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const opts = {
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...{
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defaultLimit: 15,
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maxLimit: 100,
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},
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...options,
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};
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let query = ctx.request.query;
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let limit = parseInt(query.limit);
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let offset = parseInt(query.offset);
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limit = isNaN(limit) ? opts.defaultLimit : limit;
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offset = isNaN(offset) ? 0 : offset;
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if (limit > opts.maxLimit) {
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throw httpErrors.BadRequest(
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`Pagination limit is too large (max ${opts.maxLimit})`
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);
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}
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ctx.state.pagination = {
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limit: limit,
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offset: offset,
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};
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query.limit = ctx.state.pagination.limit;
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query.offset = ctx.state.pagination.offset + query.limit;
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ctx.state.pagination.nextPath =
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'/api' + ctx.request.path + '?' + querystring.stringify(query);
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return next();
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};
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}
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