Introduce TSDB service (#31520)

* Introduce TSDB service

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

Co-authored-by: Erik Sundell <erik.sundell87@gmail.com>
Co-authored-by: Will Browne <will.browne@grafana.com>
Co-authored-by: Torkel Ödegaard <torkel@grafana.org>
Co-authored-by: Will Browne <wbrowne@users.noreply.github.com>
Co-authored-by: Zoltán Bedi <zoltan.bedi@gmail.com>

pkg/plugins/adapters/adapters.go

@@ -0,0 +1,42 @@
+// Package adapters contains plugin SDK adapters.
+package adapters
+
+import (
+	"github.com/grafana/grafana-plugin-sdk-go/backend"
+	"github.com/grafana/grafana/pkg/models"
+)
+
+// ModelToInstanceSettings converts a models.DataSource to a backend.DataSourceInstanceSettings.
+func ModelToInstanceSettings(ds *models.DataSource) (*backend.DataSourceInstanceSettings, error) {
+	jsonDataBytes, err := ds.JsonData.MarshalJSON()
+	if err != nil {
+		return nil, err
+	}
+
+	return &backend.DataSourceInstanceSettings{
+		ID:                      ds.Id,
+		Name:                    ds.Name,
+		URL:                     ds.Url,
+		Database:                ds.Database,
+		User:                    ds.User,
+		BasicAuthEnabled:        ds.BasicAuth,
+		BasicAuthUser:           ds.BasicAuthUser,
+		JSONData:                jsonDataBytes,
+		DecryptedSecureJSONData: ds.DecryptedValues(),
+		Updated:                 ds.Updated,
+	}, nil
+}
+
+// BackendUserFromSignedInUser converts Grafana's SignedInUser model
+// to the backend plugin's model.
+func BackendUserFromSignedInUser(su *models.SignedInUser) *backend.User {
+	if su == nil {
+		return nil
+	}
+	return &backend.User{
+		Login: su.Login,
+		Name:  su.Name,
+		Email: su.Email,
+		Role:  string(su.OrgRole),
+	}
+}