initial import

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

storage/postgres/postgres.go

@@ -0,0 +1,75 @@
+// go:build postgres
+
+package postgres
+
+import (
+	"database/sql"
+	"embed"
+
+	"github.com/golang-migrate/migrate/v4"
+	"github.com/golang-migrate/migrate/v4/database/postgres"
+	"github.com/golang-migrate/migrate/v4/source/iofs"
+)
+
+type PostgresStorage struct {
+	db *sql.DB
+	fs embed.FS
+}
+
+func NewStoragePostgres(fs embed.FS) func(*sql.DB) (interface{}, error) {
+	return func(db *sql.DB) (interface{}, error) {
+		return &PostgresStorage{db: db, fs: fs}, nil
+	}
+}
+
+func (s *PostgresStorage) MigrateUp() error {
+	driver, err := postgres.WithInstance(s.db, &postgres.Config{
+		MigrationsTable: postgres.DefaultMigrationsTable,
+		DatabaseName:    "template",
+	})
+	if err != nil {
+		return err
+	}
+	source, err := iofs.New(s.fs, "migrations/postgres")
+	if err != nil {
+		return err
+	}
+
+	// TODO: pass own logger
+	m, err := migrate.NewWithInstance("fs", source, "template", driver)
+	if err != nil {
+		return err
+	}
+
+	if err = m.Up(); err != nil && err != migrate.ErrNoChange {
+		return err
+	}
+
+	return nil
+}
+
+func (s *PostgresStorage) MigrateDown() error {
+	driver, err := postgres.WithInstance(s.db, &postgres.Config{
+		MigrationsTable: postgres.DefaultMigrationsTable,
+		DatabaseName:    "template",
+	})
+	if err != nil {
+		return err
+	}
+	source, err := iofs.New(s.fs, "migrations/postgres")
+	if err != nil {
+		return err
+	}
+
+	// TODO: pass own logger
+	m, err := migrate.NewWithInstance("fs", source, "template", driver)
+	if err != nil {
+		return err
+	}
+
+	if err = m.Down(); err != nil && err != migrate.ErrNoChange {
+		return err
+	}
+
+	return nil
+}

storage/postgres/query.go

@@ -0,0 +1,5 @@
+package postgres
+
+const (
+// TODO: fill queries
+)