68 lines
1.5 KiB
Go
68 lines
1.5 KiB
Go
package shroom_internals
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import (
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"database/sql"
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"fmt"
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)
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// TODO write tests for all of these
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func CreateTable(db *sql.DB) error {
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// create the table for the shroom data if it doesn't exist
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create_table := `CREATE TABLE IF NOT EXISTS shrooms (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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time INTEGER,
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humidity REAL,
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temperature REAL,
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humidifier_volts REAL
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);`
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_, err := db.Exec(create_table)
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return err
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}
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type Datapoint struct {
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Time uint64
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Temperature float32
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Humidity float32
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HumidifierVolts float32
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}
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func QueryHistory(db *sql.DB, start int64) ([]Datapoint, error) {
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query := "SELECT time, temperature, humidity, humidifier_volts FROM shrooms WHERE time > ?"
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rows, err := db.Query(query, start)
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if err != nil {
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return nil, fmt.Errorf("sql error: %w", err)
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}
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defer rows.Close()
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results := make([]Datapoint, 0)
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for rows.Next() {
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d := Datapoint{}
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err = rows.Scan(&d.Time, &d.Temperature, &d.Humidity, &d.HumidifierVolts)
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if err != nil {
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return nil, fmt.Errorf("sql scan error: %w", err)
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}
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results = append(results, d)
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}
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return results, nil
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}
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func LatestTime(db *sql.DB) (int64, error) {
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query := "SELECT MAX(time) FROM shrooms"
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rows, err := db.Query(query)
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if err != nil {
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return -1, fmt.Errorf("sql error: %w", err)
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}
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defer rows.Close()
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if !rows.Next() {
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// i guess the database is empty
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return 0, nil
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}
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t := int64(0)
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err = rows.Scan(&t)
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if err != nil {
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return -1, fmt.Errorf("sql scan error: %w", err)
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}
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return t, nil
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}
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