init

1 files changed, 88 insertions, 0 deletions

diff --git a/internal/database/sql/main.go b/internal/database/sql/main.go
new file mode 100644
index 0000000..5a523f6
--- /dev/null
+++ b/internal/database/sql/main.go
@@ -0,0 +1,88 @@
+package database
+
+import (
+	"os"
+	"time"
+
+	"log/slog"
+
+	"github.com/jmoiron/sqlx"
+	_ "github.com/mattn/go-sqlite3"
+	"github.com/pkg/errors"
+)
+
+var (
+	log      = slog.New(slog.NewJSONHandler(os.Stdout, nil))
+	dbDriver = "sqlite3"
+)
+
+type DB struct {
+	Conn *sqlx.DB
+	URI  string
+}
+
+func (d *DB) CloseAll() error {
+	for _, conn := range []*sqlx.DB{d.Conn} {
+		if err := closeConn(conn); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func closeConn(conn *sqlx.DB) error {
+	return conn.Close()
+}
+
+func Init(DBURI string) (*DB, error) {
+	var result DB
+	var err error
+	result.Conn, err = openDBConnection(DBURI, dbDriver)
+	if err != nil {
+		return nil, err
+	}
+	result.URI = DBURI
+	if err := testConnection(result.Conn); err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+func openDBConnection(dbURI, driver string) (*sqlx.DB, error) {
+	conn, err := sqlx.Open(driver, dbURI)
+	if err != nil {
+		return nil, err
+	}
+	return conn, nil
+}
+
+func testConnection(conn *sqlx.DB) error {
+	err := conn.Ping()
+	if err != nil {
+		return errors.Wrap(err, "can't ping database")
+	}
+	return nil
+}
+
+func (d *DB) PingRoutine(interval time.Duration) {
+	ticker := time.NewTicker(interval)
+	done := make(chan bool)
+	for {
+		select {
+		case <-done:
+			return
+		case t := <-ticker.C:
+			if err := testConnection(d.Conn); err != nil {
+				log.Error("failed to ping postrges db", "error", err, "ping_at", t)
+				// reconnect
+				if err := closeConn(d.Conn); err != nil {
+					log.Error("failed to close db connection", "error", err, "ping_at", t)
+				}
+				d.Conn, err = openDBConnection(d.URI, dbDriver)
+				if err != nil {
+					log.Error("failed to reconnect", "error", err, "ping_at", t)
+				}
+			}
+		}
+	}
+}