78 lines
1.6 KiB
Go
78 lines
1.6 KiB
Go
package database
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import (
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"context"
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"database/sql"
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"embed"
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"io/fs"
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_ "github.com/mattn/go-sqlite3"
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)
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type DB struct {
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ctx context.Context
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db *sql.DB
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}
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//go:embed sql/*.sql
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var schemaFiles embed.FS
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func DBInit(ctx context.Context, url string) (myDB *DB, err error) {
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var db *sql.DB
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if db, err = sql.Open("sqlite3", url); err != nil {
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return nil, err
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}
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defer func() {
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if err != nil {
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_ = db.Close()
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}
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}()
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if _, err = db.ExecContext(ctx, "PRAGMA foreign_keys = ON"); err != nil {
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return nil, err
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}
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if _, err = db.ExecContext(ctx, "PRAGMA journal_mode = WAL"); err != nil {
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return nil, err
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}
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var version int
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if err = db.QueryRowContext(ctx, `SELECT version FROM schema_version;`).Scan(&version); err != nil {
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if err.Error() == "no such table: schema_version" {
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version = 0
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} else {
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return nil, err
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}
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}
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statements := make([]string, 0)
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err = fs.WalkDir(schemaFiles, ".", func(path string, d fs.DirEntry, err error) error {
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if d.IsDir() || err != nil {
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return err
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}
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var stmts []byte
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if stmts, err = schemaFiles.ReadFile(path); err != nil {
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return err
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} else {
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statements = append(statements, string(stmts))
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}
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return nil
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})
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if err != nil {
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return nil, err
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}
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for version < len(statements) {
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if _, err = db.ExecContext(ctx, statements[version]); err != nil {
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return nil, err
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}
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version++
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}
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if _, err = db.ExecContext(ctx, `DELETE FROM schema_version; INSERT INTO schema_version (version) VALUES (?);`, version); err != nil {
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return nil, err
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}
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return &DB{ctx: ctx, db: db}, nil
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}
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func (db *DB) Close() error {
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return db.db.Close()
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}
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