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dbhandler.go
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dbhandler.go
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package main
import (
"encoding/json"
"fmt"
scribble "github.com/nanobox-io/golang-scribble"
)
func dbhandler(oper string, dbdir string, datasetin rrcBatteryData) ([]rrcBatteryData, int) {
noData := []rrcBatteryData{}
db, err := scribble.New(dbdir, nil)
if err != nil {
fmt.Println("Error", err)
return noData, 1
}
identifier := datasetin.Name + datasetin.SerialNumber
switch oper {
case "read":
return read(identifier, *db)
case "write":
err := write(datasetin, *db)
return noData, err
case "check":
if devSN, err := check(identifier, *db); err == 0 {
datasetin.DevSerialNumber = devSN
noData = append(noData, datasetin)
return noData, 0
} else {
return noData, 1
}
case "sync":
default:
fmt.Println("Error: unknown argument")
}
return noData, 1
}
func read(identifier string, db scribble.Driver) ([]rrcBatteryData, int) {
records, err := db.ReadAll(identifier)
if err != nil {
fmt.Printf("Database read error: %v\n", err)
var noData []rrcBatteryData
return noData, 1
}
recordslist := []rrcBatteryData{}
for _, f := range records {
recFound := rrcBatteryData{}
if err := json.Unmarshal([]byte(f), &recFound); err != nil {
fmt.Printf("Database read error: %v\n", err)
var noData []rrcBatteryData
return noData, 1
}
recordslist = append(recordslist, recFound)
}
return recordslist, 0
}
func write(dataset rrcBatteryData, db scribble.Driver) int {
err := db.Write(dataset.Name+dataset.SerialNumber, dataset.Timestamp, dataset)
if err != nil {
fmt.Printf("Database write error: %v\n", err)
return 1
}
return 0
}
func check(identifier string, db scribble.Driver) (string, int) {
devSN := ""
records, err := db.ReadAll(identifier)
if err != nil {
return devSN, 1
}
for _, f := range records {
recFound := rrcBatteryData{}
if err := json.Unmarshal([]byte(f), &recFound); err != nil {
fmt.Printf("Database read error: %v\n", err)
return devSN, 1
} else {
if recFound.DevSerialNumber != "" && recFound.DevSerialNumber != "(none)" {
devSN = recFound.DevSerialNumber
}
}
}
return devSN, 0
}