277 lines
8.9 KiB
JavaScript
277 lines
8.9 KiB
JavaScript
const express = require('express')
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const moment = require('moment')
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const _ = require('lodash')
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const db = require('./models/mysql')
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const score = require('./models/score')
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const transformer = require('./models/transformer')
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const climate = require('./models/climate')
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const base = require('./models/base64')
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const app = express()
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const port = 3000
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//const multiplier_temp = 5
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const multiplier = {
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temperature_mean_max: 5,
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percipitation: 3.5,
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raindays: 3,
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sunhours: 2.5,
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}
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const samplePresets = [
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{
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id: 29837,
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parameter: "temperature",
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label: "warm",
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values: [22, 25]
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}
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]
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app.get('/', (req, res) => res.send('Hello Timo!'))
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app.get('/v1/regions', (req, res) => getAllRegions().then(x => res.json({ data: x })))
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app.get('/v1/presets', (req, res) => res.json({ data: samplePresets}))
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app.get('/v1/search', searchHandler)
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app.get('/v1/update/climate', climateUpdateHandler)
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app.listen(port, () => console.log(`Travopti backend listening at http://localhost:${port}`))
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function climateUpdateHandler(req, res) {
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let parameter = []
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if (req.query.startDate) parameter.push(req.query.startDate)
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if (req.query.endDate) parameter.push(req.query.endDate)
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climate.update(...parameter).then(x => {
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res.send(x)
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}).catch(e => {
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let result = {
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message: 'error during update process. check backend logs.',
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error: e
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}
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res.send(result)
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}
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)
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}
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function searchHandler(req, res) {
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let response = {}
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response.meta = {
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params: req.params,
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query: req.query,
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headers: req.headers
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}
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let q = req.query.q ? base.base64ToObj(req.query.q) : req.query
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console.log('Q:', q)
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let queryObj = {}
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if (q.temperature) queryObj['temperature_mean_max'] = q.temperature
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if (q.percipitation) queryObj['percipitation'] = q.percipitation
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if (q.raindays) queryObj['raindays'] = q.raindays
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if (q.sunhours) queryObj['sunhours'] = q.sunhours
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scoreAndSearch(q.from, q.to, queryObj).then(searchResults => {
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response.data = searchResults
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res.json(response)
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}).catch(e => {
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console.log(e)
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res.json(e.message)
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})
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}
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async function scoreAndSearch(from, to, queries) {
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// TODO break funtion into parts when implementing non-climate queries and modularize (new file)
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console.log('search')
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// get Min and Max values for each Parameter
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const minMax = await getClimateMinMax()
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// randomize if empty queries
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if (_.isEmpty(queries)) {
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let t = _.round(_.random(minMax.min.temperature_mean_max, minMax.max.temperature_mean_max-5),0)
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let p = _.round(_.random(minMax.min.percipitation, minMax.max.percipitation - 50), 0)
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let r = _.round(_.random(minMax.min.raindays, minMax.max.raindays - 5), 0)
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let s = _.round(_.random(minMax.min.sunhours, minMax.max.sunhours - 50), 0)
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queries.temperature_mean_max = `${t},${t + 5}`
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queries.percipitation = `${p},${p + 50}`
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queries.raindays = `${r},${r + 5}`
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queries.sunhours = `${s},${s + 50}`
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}
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queries = oldToNewQuerySyntax(queries)
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console.log(queries)
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// TODO simplify and remove support for old query syntaax
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let monthFrom = 0
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let monthTo = 0
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let dayFrom = 0
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let dayTo = 0
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if (_.isNumber(from) && _.isNumber(to)) {
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let dateFrom = moment(from).toDate()
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let dateTo = moment(to).toDate()
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monthFrom = dateFrom.getMonth()
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monthTo = dateTo.getMonth()
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dayFrom = dateFrom.getDay()
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dayTo = dateTo.getDay()
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if (moment(dateFrom).add(23, 'hours').isAfter(moment(dateTo))) throw new Error("ERR: 'to' must be at least one day after 'from'.")
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} else {
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// to still support old query syntax
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let re = /([12]\d{3}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01]))/i;
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monthFrom = Number(from.split("-")[1])
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monthTo = Number(to.split("-")[1])
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dayFrom = Number(from.split("-")[2])
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dayTo = Number(to.split("-")[2])
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if (!from.match(re) || !to.match(re)) throw new Error("ERR: invalid parameter:",from,to)
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if (moment(from, 'YYYY-MM-DD').add(23, 'hours').isAfter(moment(to, 'YYYY-MM-DD'))) throw new Error("ERR: 'to' must be at least one day after 'from'.")
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}
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// -- Prepare search --
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// to calculate average if traveldates are in more than one month
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let travelPeriods = []
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if (monthFrom === monthTo) {
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let element = {
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month: monthFrom,
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days: dayTo - dayFrom
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}
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travelPeriods.push(element)
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} else {
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for (let index = monthFrom; index <= monthTo; index++) {
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let element = {}
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if (index === monthFrom) {
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element = {
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month: index,
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days: 32 - dayFrom
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}
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} else if (index === monthTo) {
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element = {
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month: index,
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days: dayTo
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}
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} else {
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element = {
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month: index,
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days: 30
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}
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}
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travelPeriods.push(element)
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}
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}
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// calculate detail scores
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let detailScores = await Promise.all(travelPeriods.map(async period => {
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period.climate = await getAllRegionsWithClimatePerMonth(period.month)
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period.scores = {}
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Object.entries(queries).forEach(([key, value]) => {
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// console.log('key',key)
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// console.log('val', value)
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period.scores[key] = calculateScores(key, period.climate, value[0], value[1], minMax)
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});
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return period
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}));
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// calculate ratio and transform into target object
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return {
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results: transformer.transform(detailScores),
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debug: {
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detailScores: detailScores,
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minMax: minMax
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}
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}
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}
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function calculateScores(type, regionDataRows, searchLowParam, searchMaxParam, minMax) {
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console.log('calculateScores for', type)
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let result = regionDataRows.map(x => {
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const sc = Math.round(score.calculateScoreRange(minMax.min[type], minMax.max[type], multiplier[type], x[type], searchLowParam, searchMaxParam) * 100) / 100
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return {
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region_id: x.region_id,
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type: type,
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value: x[type],
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score: x[type] === null ? null : sc
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}
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})
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return result
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}
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async function getClimateMinMax() {
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console.log('getClimateMinMax')
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const sqlMin = `SELECT
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MIN(temperature_mean) AS temperature_mean,
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MIN(temperature_mean_min) AS temperature_mean_min,
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MIN(temperature_mean_max) AS temperature_mean_max,
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MIN(percipitation) AS percipitation,
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MIN(raindays) AS raindays,
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MIN(sunshine) AS sunhours
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FROM region_climate`
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const sqlMax = `SELECT
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MAX(temperature_mean) AS temperature_mean,
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MAX(temperature_mean_min) AS temperature_mean_min,
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MAX(temperature_mean_max) AS temperature_mean_max,
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MAX(percipitation) AS percipitation,
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MAX(raindays) AS raindays,
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MAX(sunshine) AS sunhours
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FROM region_climate`
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const [qResMin, qResMax] = await Promise.all([getQueryRows(sqlMin), getQueryRows(sqlMax)])
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//console.log(qResMin)
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return { min: qResMin[0], max: qResMax[0] }
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}
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async function getQueryRows(sql) {
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//console.log('getQueryRows')
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const [rows, fields] = await db.execute(sql)
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return rows
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}
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function getAllRegions() {
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const sql = `SELECT
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regions.id AS region_id,
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regions.region AS name,
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regions.country_id AS country_id,
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countries.country AS country,
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regions.meteostat_id AS meteostat_id
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FROM regions
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JOIN countries
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ON regions.country_id = countries.id`
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return getQueryRows(sql)
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}
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function getClimatePerRegionAndMonth(regionId, month) {
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console.log('getClimatePerRegionAndMonth')
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const sql = `SELECT region_id, AVG(temperature_mean), AVG(temperature_mean_min), AVG(temperature_mean_max), AVG(percipitation), AVG(sunshine) FROM region_climate WHERE month = ${month} AND region_id = ${regionId}`
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return getQueryRows(sql)
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}
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function getAllRegionsWithClimatePerMonth(month) {
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console.log('getAllRegionsWithClimatePerMonth')
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const sql = `SELECT
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region_climate.region_id AS region_id,
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regions.country_id AS country_id,
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regions.region AS name,
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ROUND(AVG(region_climate.temperature_mean), 1) AS temperature_mean,
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ROUND(AVG(region_climate.temperature_mean_min), 1) AS temperature_mean_min,
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ROUND(AVG(region_climate.temperature_mean_max), 1) AS temperature_mean_max,
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ROUND(AVG(region_climate.percipitation), 1) AS percipitation,
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ROUND(AVG(region_climate.raindays), 1) AS raindays,
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ROUND(AVG(region_climate.sunshine), 1) AS sunhours
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FROM region_climate JOIN regions ON region_climate.region_id = regions.id WHERE region_climate.month = ${month} GROUP BY region_id`
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return getQueryRows(sql)
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}
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function oldToNewQuerySyntax(queries) {
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let res = {}
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try {
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if (queries.temperature_mean_max) res.temperature_mean_max = [queries.temperature_mean_max.split(',')[0], queries.temperature_mean_max.split(',')[1]]
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if (queries.percipitation) res.percipitation = [queries.percipitation.split(',')[0], queries.percipitation.split(',')[1]]
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if (queries.raindays) res.raindays = [queries.raindays.split(',')[0], queries.raindays.split(',')[1]]
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if (queries.sunhours) res.sunhours = [queries.sunhours.split(',')[0], queries.sunhours.split(',')[1]]
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console.log('queries successfully transformed');
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} catch (error) {
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console.log('queries are ok');
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return queries
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}
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return res
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} |