Cloud Migrations: Create new service for cloud migrations (#80949)

* introduce feature toggle

* create base service structure

* fix sample metric

* register metrics

* add to codeowners

* separate api dtos from service models

* remove leading newline

pkg/services/cloudmigrations/api/api.go

@@ -0,0 +1,57 @@
+package api
+
+import (
+	"net/http"
+
+	"github.com/grafana/grafana/pkg/api/response"
+	"github.com/grafana/grafana/pkg/api/routing"
+	"github.com/grafana/grafana/pkg/infra/log"
+	"github.com/grafana/grafana/pkg/middleware"
+	"github.com/grafana/grafana/pkg/services/cloudmigrations"
+	"github.com/grafana/grafana/pkg/services/cloudmigrations/models"
+	contextmodel "github.com/grafana/grafana/pkg/services/contexthandler/model"
+	"github.com/grafana/grafana/pkg/web"
+)
+
+type MigrationAPI struct {
+	cloudMigrationsService cloudmigrations.CloudMigrationService
+	routeRegister          routing.RouteRegister
+	log                    log.Logger
+}
+
+func RegisterApi(
+	rr routing.RouteRegister,
+	cms cloudmigrations.CloudMigrationService,
+) *MigrationAPI {
+	api := &MigrationAPI{
+		log:                    log.New("cloudmigrations.api"),
+		routeRegister:          rr,
+		cloudMigrationsService: cms,
+	}
+	api.registerEndpoints()
+	return api
+}
+
+// RegisterAPIEndpoints Registers Endpoints on Grafana Router
+func (api *MigrationAPI) registerEndpoints() {
+	api.routeRegister.Group("/api/cloudmigrations", func(apiRoute routing.RouteRegister) {
+		apiRoute.Post(
+			"/migrate_datasources",
+			routing.Wrap(api.MigrateDatasources),
+		)
+	}, middleware.ReqGrafanaAdmin)
+}
+
+func (api *MigrationAPI) MigrateDatasources(c *contextmodel.ReqContext) response.Response {
+	var req migrateDatasourcesRequestDTO
+	if err := web.Bind(c.Req, &req); err != nil {
+		return response.Error(http.StatusBadRequest, "bad request data", err)
+	}
+
+	resp, err := api.cloudMigrationsService.MigrateDatasources(c.Req.Context(), &models.MigrateDatasourcesRequest{MigrateToPDC: req.MigrateToPDC, MigrateCredentials: req.MigrateCredentials})
+	if err != nil {
+		return response.Error(http.StatusInternalServerError, "data source migrations error", err)
+	}
+
+	return response.JSON(http.StatusOK, migrateDatasourcesResponseDTO{DatasourcesMigrated: resp.DatasourcesMigrated})
+}