70 lines
3.0 KiB
JavaScript
70 lines
3.0 KiB
JavaScript
const axios = require('axios');
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const {DOMParser} = require('xmldom');
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const UserError = require('vn-loopback/util/user-error');
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module.exports = Self => {
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Self.remoteMethod('exchangeRateUpdate', {
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description: 'Updates the exchange rates from an XML feed',
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accessType: 'WRITE',
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accepts: [],
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http: {
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path: '/exchangeRateUpdate',
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verb: 'post'
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},
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returns: {
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arg: 'result',
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type: 'object',
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root: true
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}
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});
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Self.exchangeRateUpdate = async() => {
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const response = await axios.get('http://www.ecb.europa.eu/stats/eurofxref/eurofxref-hist-90d.xml');
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const xmlData = response.data;
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const doc = new DOMParser().parseFromString(xmlData, 'text/xml');
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const cubes = doc.getElementsByTagName('Cube');
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const models = Self.app.models;
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const maxDateRecord = await models.ReferenceRate.findOne({order: 'dated DESC'});
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const maxDate = maxDateRecord && maxDateRecord.dated ? new Date(maxDateRecord.dated) : null;
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for (let i = 0; i < cubes.length; i++) {
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const cube = cubes[i];
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if (cube.nodeType === 1 && cube.attributes.getNamedItem('time')) {
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const xmlDate = new Date(cube.getAttribute('time'));
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const xmlDateWithoutTime = new Date(xmlDate.getFullYear(), xmlDate.getMonth(), xmlDate.getDate());
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if (!maxDate || maxDate < xmlDateWithoutTime) {
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for (let j = 0; j < cube.childNodes.length; j++) {
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const rateCube = cube.childNodes[j];
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if (rateCube.nodeType === doc.ELEMENT_NODE) {
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const currencyCode = rateCube.getAttribute('currency');
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const rate = rateCube.getAttribute('rate');
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if (['USD', 'CNY', 'GBP'].includes(currencyCode)) {
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const currency = await models.Currency.findOne({where: {code: currencyCode}});
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if (!currency) throw new UserError(`Currency not found for code: ${currencyCode}`);
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const existingRate = await models.ReferenceRate.findOne({
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where: {currencyFk: currency.id, dated: xmlDate}
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});
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if (existingRate) {
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if (existingRate.value !== rate)
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await existingRate.updateAttributes({value: rate});
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} else {
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await models.ReferenceRate.create({
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currencyFk: currency.id,
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dated: xmlDate,
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value: rate
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});
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}
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}
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}
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}
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}
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}
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}
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};
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};
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