88 lines
1.6 KiB
Go
88 lines
1.6 KiB
Go
package pigeon
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import (
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"database/sql"
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"log"
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"modernc.org/ql"
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)
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type migration struct {
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up string
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down string
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}
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var migrations = []migration{
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migration{
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up: `CREATE TABLE IF NOT EXISTS configs (
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id INTEGER PRIMARY KEY,
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key TEXT NOT NULL
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value TEXT NOT NULL);`,
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down: `DROP TABLE IF EXISTS configs`,
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},
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}
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func openDB() *sql.DB {
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ql.RegisterDriver()
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db, err0 := sql.Open("ql", "file://pigeon_metadata/secret.db")
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if err0 != nil {
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log.Fatalf("failed to open db: %s", err0)
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}
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err1 := db.Ping()
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if err1 != nil {
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log.Fatalf("failed to ping db: %s", err1)
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}
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tx, err := db.Begin()
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if err != nil {
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log.Fatalf("Failed to start transaction: %s", err)
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}
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for _, migration := range migrations {
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tx.Exec(migration.up)
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}
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tx.Commit()
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return db
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}
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// Database is a database object. Currently using modernc.org/ql
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var Database = openDB()
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// SetConfig will write a key/value pair to the `configs`
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// table
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func SetConfig(key string, value []byte) {
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tx, err := Database.Begin()
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if err != nil {
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log.Fatalf("Failed to SetConfig (1): %s", err)
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}
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tx.Exec("INSERT INTO configs (?, ?)", key, value)
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err1 := tx.Commit()
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if err1 != nil {
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log.Fatalf("Failed to SetConfig (2): %s", err)
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}
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}
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// GetConfig retrieves a key/value pair from the database.
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func GetConfig(key string) []byte {
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rows, err := Database.Query("SELECT key FROM configs WHERE value = ? LIMIT 1", key)
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if err != nil {
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log.Fatalf("Unable to retrieve config key(1): %s", err)
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}
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var result []byte
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for rows.Next() {
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err := rows.Scan(&result)
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if err != nil {
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log.Fatalf("Unable to retrieve config key(2): %s", err)
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}
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}
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return result
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}
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