@unito/integration-sdk/dist/src/middlewares/filters.js

Integration SDK

import { OperatorTypes } from '@unito/integration-api';
// The operators are ordered by their symbol length, in descending order.
// This is necessary because the symbol of an operator can be
// a subset of the symbol of another operator.
//
// For example, the symbol "=" (EQUAL) is a subset of the symbol "!=" (NOT_EQUAL).
const ORDERED_OPERATORS = Object.values(OperatorTypes).sort((o1, o2) => o2.length - o1.length);
function extractFilters(req, res, next) {
    const rawFilters = req.query.filter;
    res.locals.filters = [];
    if (typeof rawFilters === 'string') {
        for (const rawFilter of rawFilters.split(',')) {
            for (const operator of ORDERED_OPERATORS) {
                if (rawFilter.includes(operator)) {
                    const [field, valuesRaw] = rawFilter.split(operator, 2);
                    const values = valuesRaw ? valuesRaw.split('|').map(decodeURIComponent) : [];
                    res.locals.filters.push({ field: field, operator, values });
                    break;
                }
            }
        }
    }
    next();
}
export default extractFilters;