67 lines
1.1 KiB
Go
67 lines
1.1 KiB
Go
package models
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import (
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"database/sql"
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"time"
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_ "github.com/lib/pq"
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)
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var db *sql.DB
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type Measurement struct {
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CreatedAt time.Time
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Value float32
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}
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func InitDB(dataSourceName string) (err error) {
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db, err = sql.Open("postgres", dataSourceName)
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if err != nil {
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return err
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}
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if err = db.Ping(); err != nil {
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return err
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}
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_, err = db.Exec(`
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CREATE TABLE IF NOT EXISTS measurements (
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created_at TIMESTAMP,
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value NUMERIC (3, 1)
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)
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`)
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return err
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}
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func AllMeasurements() (measurements []Measurement, err error) {
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rows, err := db.Query("SELECT * FROM measurements")
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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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var measurement Measurement
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err = rows.Scan(&measurement.CreatedAt, &measurement.Value)
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if err != nil {
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return nil, err
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}
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measurements = append(measurements, measurement)
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}
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if err = rows.Err(); err != nil {
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return nil, err
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}
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return measurements, nil
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}
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func InsertMeasurement(value float64) (err error) {
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_, err = db.Exec(`
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INSERT INTO measurements VALUES (current_timestamp, $1)
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`, value)
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return err
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}
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