feat: Add API

feat: Add DB-backed time provider

internal/database/sqlite.go

@@ -0,0 +1,38 @@
+package database
+
+import (
+	"database/sql"
+	"fmt"
+	"net/url"
+
+	"github.com/doug-martin/goqu/v9"
+	goqusqlite3 "github.com/doug-martin/goqu/v9/dialect/sqlite3"
+	_ "modernc.org/sqlite"
+)
+
+func init() {
+	goqu.RegisterDialect("sqlite3", func() *goqu.SQLDialectOptions {
+		do := goqusqlite3.DialectOptions()
+		do.SupportsReturn = true
+		return do
+	}())
+}
+
+func NewSqliteDB(filename string) (*goqu.Database, error) {
+	pragmas := url.Values{
+		"_pragma": {
+			"journal_mode(WAL)",
+			"foreign_keys(1)",
+			"synchronous(NORMAL)",
+			"busy_timeout(5000)",
+		},
+	}.Encode()
+	dsn := fmt.Sprintf("%s?%s", filename, pragmas)
+
+	conn, err := sql.Open("sqlite", dsn)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open database: %w", err)
+	}
+
+	return goqu.New("sqlite3", conn), nil
+}