salix/modules/worker/back/methods/worker/search.js

const ParameterizedSQL = require('loopback-connector').ParameterizedSQL;
const mergeFilters = require('vn-loopback/util/filter').mergeFilters;

module.exports = Self => {
    Self.remoteMethodCtx('search', {
        description: 'Returns an array of search results for a specified worker',
        accepts: [{
            arg: 'filter',
            type: 'object',
            description: 'Filter to define conditions and paginate the data.',
            required: true
        },
        {
            arg: 'departmentCodes',
            type: ['string'],
            description: 'Department codes to search workers',
        }],
        returns: {
            type: ['object'],
            root: true
        },
        http: {
            path: `/search`,
            verb: 'GET'
        }
    });

    Self.search = async(ctx, filter, departmentCodes) => {
        const models = Self.app.models;
        const conn = Self.dataSource.connector;

        if (departmentCodes) {
            const departments = await models.Department.find({
                fields: ['id', 'sons'],
                where: {code: {inq: departmentCodes}}
            });

            const allLeaves = await getAllLeaves(ctx, departments);
            const where = {'departmentFk': {inq: allLeaves}};
            filter = mergeFilters(filter, {where});
        }

        const stmt = new ParameterizedSQL(`
        SELECT *
                FROM(
                    SELECT w.id, w.code, u.name, u.nickname, u.active, wd.departmentFk
                        FROM worker w
                            JOIN account.user u ON u.id = w.id
                            LEFT JOIN workerDepartment wd ON wd.workerFk = w.id
                ) w`);

        stmt.merge(conn.makeSuffix(filter));

        return conn.executeStmt(stmt);
    };

    async function getAllLeaves(ctx, departments) {
        const models = Self.app.models;
        const leaves = [];
        for (const department of departments) {
            if (department.sons > 0) {
                const subLeaves = await models.Department.getLeaves(ctx, department.id, null);
                const grandLeaves = await getAllLeaves(ctx, subLeaves);
                leaves.push(...grandLeaves);
            }
            leaves.push(department.id);
        }
        return leaves;
    }
};