MaysWind
101 lines
3.1 KiB
Go
101 lines
3.1 KiB
Go
package api
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import (
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"io"
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"net/http"
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"sort"
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"time"
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"github.com/mayswind/ezbookkeeping/pkg/core"
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"github.com/mayswind/ezbookkeeping/pkg/errs"
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"github.com/mayswind/ezbookkeeping/pkg/exchangerates"
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"github.com/mayswind/ezbookkeeping/pkg/log"
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"github.com/mayswind/ezbookkeeping/pkg/models"
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"github.com/mayswind/ezbookkeeping/pkg/settings"
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)
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// ExchangeRatesApi represents exchange rate api
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type ExchangeRatesApi struct{}
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// Initialize a exchange rate api singleton instance
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var (
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ExchangeRates = &ExchangeRatesApi{}
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)
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// LatestExchangeRateHandler returns latest exchange rate data
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func (a *ExchangeRatesApi) LatestExchangeRateHandler(c *core.Context) (interface{}, *errs.Error) {
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dataSource := exchangerates.Container.Current
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if dataSource == nil {
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return nil, errs.ErrInvalidExchangeRatesDataSource
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}
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uid := c.GetCurrentUid()
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client := &http.Client{
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Timeout: time.Duration(settings.Container.Current.ExchangeRatesRequestTimeout) * time.Millisecond,
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}
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urls := dataSource.GetRequestUrls()
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exchangeRateResps := make([]*models.LatestExchangeRateResponse, 0, len(urls))
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for i := 0; i < len(urls); i++ {
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resp, err := client.Get(urls[i])
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if err != nil {
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log.ErrorfWithRequestId(c, "[exchange_rates.LatestExchangeRateHandler] failed to request latest exchange rate data for user \"uid:%d\", because %s", uid, err.Error())
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return nil, errs.ErrFailedToRequestRemoteApi
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}
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if resp.StatusCode != 200 {
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log.ErrorfWithRequestId(c, "[exchange_rates.LatestExchangeRateHandler] failed to get latest exchange rate data response for user \"uid:%d\", because response code is not 200", uid)
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return nil, errs.ErrFailedToRequestRemoteApi
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}
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defer resp.Body.Close()
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body, err := io.ReadAll(resp.Body)
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exchangeRateResp, err := dataSource.Parse(c, body)
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if err != nil {
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log.ErrorfWithRequestId(c, "[exchange_rates.LatestExchangeRateHandler] failed to parse response for user \"uid:%d\", because %s", uid, err.Error())
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return nil, errs.Or(err, errs.ErrFailedToRequestRemoteApi)
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}
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exchangeRateResps = append(exchangeRateResps, exchangeRateResp)
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}
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lastExchangeRateResponse := exchangeRateResps[len(exchangeRateResps)-1]
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allExchangeRatesMap := make(map[string]string)
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for i := 0; i < len(exchangeRateResps); i++ {
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exchangeRateResp := exchangeRateResps[i]
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for j := 0; j < len(exchangeRateResp.ExchangeRates); j++ {
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exchangeRate := exchangeRateResp.ExchangeRates[j]
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allExchangeRatesMap[exchangeRate.Currency] = exchangeRate.Rate
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}
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}
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allExchangeRatesMap[lastExchangeRateResponse.BaseCurrency] = "1"
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allExchangeRates := make(models.LatestExchangeRateSlice, 0, len(allExchangeRatesMap))
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for currency, rate := range allExchangeRatesMap {
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allExchangeRates = append(allExchangeRates, &models.LatestExchangeRate{
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Currency: currency,
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Rate: rate,
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})
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}
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sort.Sort(allExchangeRates)
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finalExchangeRateResponse := &models.LatestExchangeRateResponse{
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DataSource: lastExchangeRateResponse.DataSource,
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ReferenceUrl: lastExchangeRateResponse.ReferenceUrl,
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UpdateTime: lastExchangeRateResponse.UpdateTime,
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BaseCurrency: lastExchangeRateResponse.BaseCurrency,
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ExchangeRates: allExchangeRates,
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}
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return finalExchangeRateResponse, nil
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}
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