96 lines
1.8 KiB
Go
96 lines
1.8 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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key string NOT NULL,
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value string NOT NULL
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);
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CREATE UNIQUE INDEX IF NOT EXISTS unique_configs_key ON configs (key);
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`,
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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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_, err := tx.Exec(migration.up)
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if err != nil {
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log.Fatalf("Migration failure: %s", err)
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}
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}
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if tx.Commit() != nil {
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log.Fatal(err)
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}
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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 (0): %s", err)
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}
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_, err2 := tx.Exec("INSERT INTO configs(key, value) VALUES(?1, ?2)", key, string(value))
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if err2 != nil {
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log.Fatalf("Failed to SetConfig (1): %s", err2)
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}
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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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var result string
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row := Database.QueryRow("SELECT value FROM configs WHERE key=$1", key)
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err := row.Scan(&result)
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if err != nil {
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if err == sql.ErrNoRows {
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log.Fatalf("CONFIG MISSING: %s", key)
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} else {
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panic(err)
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}
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}
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return []byte(result)
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}
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