66 lines
1.5 KiB
Go
66 lines
1.5 KiB
Go
package services
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import "time"
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type SensorValuesService struct {
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ctx *Context
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}
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type sensorValue struct {
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Timestamp int64 `json:"timestamp"`
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Value float64 `json:"value"`
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}
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func (s *SensorValuesService) Push(sensor string, value float64) (int64, error) {
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res, err := s.ctx.DB.Exec("INSERT INTO sensor_values (timestamp, sensor, value) VALUES (?, ?, ?)", time.Now().Unix(), sensor, value)
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if err != nil {
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return 0, err
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}
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return res.LastInsertId()
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}
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func (s *SensorValuesService) GetList(sensor string, from int64, to int64) ([]sensorValue, error) {
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var value float64
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var timestamp int64
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values := make([]sensorValue, 0)
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rows, err := s.ctx.DB.Query("SELECT timestamp, value FROM sensor_values WHERE sensor = ? AND timestamp > ? AND timestamp < ? ORDER BY timestamp ASC", sensor, from, to)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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for rows.Next() {
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err := rows.Scan(×tamp, &value)
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if err != nil {
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return nil, err
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}
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values = append(values, sensorValue{Timestamp: timestamp, Value: value})
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}
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err = rows.Err()
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if err != nil {
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return nil, err
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}
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return values, nil
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}
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func (s *SensorValuesService) GetLatest(sensor string, from int64, to int64) (*sensorValue, error) {
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var value = sensorValue{}
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row := s.ctx.DB.QueryRow("SELECT timestamp, value FROM sensor_values WHERE sensor = ? AND timestamp > ? AND timestamp < ? ORDER BY timestamp DESC LIMIT 1", sensor, from, to)
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err := row.Scan(&value.Timestamp, &value.Value)
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if err != nil {
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return nil, err
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}
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return &value, nil
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}
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