feat: Add ent-based sqlite3 storage

Signed-off-by: m.nabokikh <maksim.nabokikh@flant.com>

storage/ent/client/connector.go

@@ -0,0 +1,88 @@
+package client
+
+import (
+	"context"
+
+	"github.com/dexidp/dex/storage"
+)
+
+// CreateConnector saves a connector into the database.
+func (d *Database) CreateConnector(connector storage.Connector) error {
+	_, err := d.client.Connector.Create().
+		SetID(connector.ID).
+		SetName(connector.Name).
+		SetType(connector.Type).
+		SetResourceVersion(connector.ResourceVersion).
+		SetConfig(connector.Config).
+		Save(context.TODO())
+	if err != nil {
+		return convertDBError("create connector: %w", err)
+	}
+	return nil
+}
+
+// ListConnectors extracts an array of connectors from the database.
+func (d *Database) ListConnectors() ([]storage.Connector, error) {
+	connectors, err := d.client.Connector.Query().All(context.TODO())
+	if err != nil {
+		return nil, convertDBError("list connectors: %w", err)
+	}
+
+	storageConnectors := make([]storage.Connector, 0, len(connectors))
+	for _, c := range connectors {
+		storageConnectors = append(storageConnectors, toStorageConnector(c))
+	}
+	return storageConnectors, nil
+}
+
+// GetConnector extracts a connector from the database by id.
+func (d *Database) GetConnector(id string) (storage.Connector, error) {
+	connector, err := d.client.Connector.Get(context.TODO(), id)
+	if err != nil {
+		return storage.Connector{}, convertDBError("get connector: %w", err)
+	}
+	return toStorageConnector(connector), nil
+}
+
+// DeleteConnector deletes a connector from the database by id.
+func (d *Database) DeleteConnector(id string) error {
+	err := d.client.Connector.DeleteOneID(id).Exec(context.TODO())
+	if err != nil {
+		return convertDBError("delete connector: %w", err)
+	}
+	return nil
+}
+
+// UpdateConnector changes a connector by id using an updater function and saves it to the database.
+func (d *Database) UpdateConnector(id string, updater func(old storage.Connector) (storage.Connector, error)) error {
+	tx, err := d.client.Tx(context.TODO())
+	if err != nil {
+		return convertDBError("update connector tx: %w", err)
+	}
+
+	connector, err := tx.Connector.Get(context.TODO(), id)
+	if err != nil {
+		return rollback(tx, "update connector database: %w", err)
+	}
+
+	newConnector, err := updater(toStorageConnector(connector))
+	if err != nil {
+		return rollback(tx, "update connector updating: %w", err)
+	}
+
+	_, err = tx.Connector.UpdateOneID(newConnector.ID).
+		SetName(newConnector.Name).
+		SetType(newConnector.Type).
+		SetResourceVersion(newConnector.ResourceVersion).
+		SetConfig(newConnector.Config).
+		Save(context.TODO())
+	if err != nil {
+		return rollback(tx, "update connector uploading: %w", err)
+	}
+
+	if err = tx.Commit(); err != nil {
+		return rollback(tx, "update connector commit: %w", err)
+	}
+
+	return nil
+}