func dataHandler(w http.ResponseWriter, r *http.Request, db *data.Database) {
var queries []map[string]string
err := json.Unmarshal([]byte(r.FormValue("query")), &queries)
if err != nil {
jww.ERROR.Println(err)
return
}
//channel := r.FormValue("channel")
t, interval := computeTime(r.FormValue("time"))
var result struct {
Data [][]interface{}
Errorbars [][]interface{}
Label []string
}
result.Data = make([][]interface{}, len(queries))
result.Errorbars = make([][]interface{}, len(queries))
result.Label = make([]string, len(queries))
rxp := regexp.MustCompile(`\[([^]]*)\]`)
for index, querymap := range queries {
id := "%"
if _, ok := querymap["id"]; ok {
id = querymap["id"]
}
datatype := "%"
if _, ok := querymap["type"]; ok {
datatype = querymap["type"]
}
if _, ok := querymap["label"]; ok {
result.Label[index] = querymap["label"]
} else {
result.Label[index] = "Unknown"
}
key := rxp.ReplaceAllString(datatype, "")
var rows <-chan data.Row
if interval > 1 {
rows = db.QueryRowsInterval(t, key, id, interval)
} else {
rows = db.QueryRows(t, key, id)
}
col := rxp.FindStringSubmatch(datatype)
unitmap := viper.GetStringMapString("units")
for row := range rows {
_, off := time.Unix(row.Timestamp, 0).Zone()
t := (time.Unix(row.Timestamp, 0).Unix() + int64(off)) * 1000
sub := make([]interface{}, 2)
sub[0] = t
var value float64
if len(col) > 1 {
switch col[1] {
case "min":
value = row.Min
case "max":
value = row.Max
case "avg":
value = row.Avg
default:
value = row.Avg
}
} else {
value = row.Avg
}
sub[1] = convertUnit(unitmap, r.FormValue("type"), value)
result.Data[index] = append(result.Data[index], sub)
sub = make([]interface{}, 3)
sub[0] = t
sub[1] = convertUnit(unitmap, r.FormValue("type"), row.Min)
sub[2] = convertUnit(unitmap, r.FormValue("type"), row.Max)
result.Errorbars[index] = append(result.Errorbars[index], sub)
}
index++
}
json.NewEncoder(w).Encode(result)
}