/
lineEventsDownloadHandler.go
63 lines (55 loc) · 1.48 KB
/
lineEventsDownloadHandler.go
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package http
import (
"bytes"
"encoding/csv"
"net/http"
log "github.com/sirupsen/logrus"
"github.com/VagabondDataNinjas/gizlinebot/storage"
"github.com/labstack/echo"
)
func LineEventsDownloadHandlerBuilder(s *storage.Sql) func(e echo.Context) error {
return func(c echo.Context) error {
c.Response().Header().Set(echo.HeaderContentType, "text/csv")
c.Response().Header().Set("Content-Description", "File Transfer")
c.Response().Header().Set("Content-Disposition", "attachment; filename=linevents.csv")
c.Response().WriteHeader(http.StatusOK)
// create the CSV head
csvHead := []string{
"UserId",
"DisplayName",
"EventType",
"EventTime",
}
events, err := s.GetRawLineEvents()
if err != nil {
log.Errorf("Error getting raw events data: %s", err)
return err
}
b := &bytes.Buffer{}
csvW := csv.NewWriter(b)
csvRow := make([]string, len(csvHead))
for _, event := range events {
// insert the cell data at the correct index based on csv head row
csvRow[0] = event.UserId
csvRow[1] = event.DisplayName
csvRow[2] = event.EventType
csvRow[3] = event.EventTime
if err = respWFlushRow(csvRow, csvW, c, b); err != nil {
return err
}
}
return nil
}
}
func respWFlushRow(csvRow []string, csvW *csv.Writer, c echo.Context, b *bytes.Buffer) error {
if err := csvW.Write(csvRow); err != nil {
return err
}
csvW.Flush()
if _, err := c.Response().Write(b.Bytes()); err != nil {
return err
}
c.Response().Flush()
b.Reset()
return nil
}