DataSources: Add datasource fetching + querying interface (#80749)

* first pass

* separate oss + enterprise

* tidy things up

* add ctx

* fix tests

* use standalone svcs

* mv plugin context provide

* fix wire

* fix import

pkg/services/pluginsintegration/plugincontext/plugincontext.go

@@ -11,6 +11,7 @@ import (
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
 	"github.com/grafana/grafana-plugin-sdk-go/backend/useragent"
 
+	"github.com/grafana/grafana/pkg/infra/appcontext"
 	"github.com/grafana/grafana/pkg/infra/localcache"
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/plugins"
@@ -30,12 +31,13 @@ const (
 )
 
 func ProvideService(cfg *setting.Cfg, cacheService *localcache.CacheService, pluginStore pluginstore.Store,
-	dataSourceService datasources.DataSourceService, pluginSettingsService pluginsettings.Service,
-	licensing plugins.Licensing, pCfg *config.Cfg) *Provider {
+	dataSourceCache datasources.CacheService, dataSourceService datasources.DataSourceService,
+	pluginSettingsService pluginsettings.Service, licensing plugins.Licensing, pCfg *config.Cfg) *Provider {
 	return &Provider{
 		cfg:                   cfg,
 		cacheService:          cacheService,
 		pluginStore:           pluginStore,
+		dataSourceCache:       dataSourceCache,
 		dataSourceService:     dataSourceService,
 		pluginSettingsService: pluginSettingsService,
 		pluginEnvVars:         envvars.NewProvider(pCfg, licensing),
@@ -48,6 +50,7 @@ type Provider struct {
 	pluginEnvVars         *envvars.Service
 	cacheService          *localcache.CacheService
 	pluginStore           pluginstore.Store
+	dataSourceCache       datasources.CacheService
 	dataSourceService     datasources.DataSourceService
 	pluginSettingsService pluginsettings.Service
 	logger                log.Logger
@@ -128,6 +131,48 @@ func (p *Provider) GetWithDataSource(ctx context.Context, pluginID string, user
 	return pCtx, nil
 }
 
+func (p *Provider) PluginContextForDataSource(ctx context.Context, pluginID, name string) (backend.PluginContext, error) {
+	plugin, exists := p.pluginStore.Plugin(ctx, pluginID)
+	if !exists {
+		return backend.PluginContext{}, plugins.ErrPluginNotRegistered
+	}
+
+	user, err := appcontext.User(ctx)
+	if err != nil {
+		return backend.PluginContext{}, err
+	}
+	ds, err := p.dataSourceCache.GetDatasourceByUID(ctx, name, user, false)
+	if err != nil {
+		return backend.PluginContext{}, err
+	}
+
+	pCtx := backend.PluginContext{
+		PluginID:      plugin.ID,
+		PluginVersion: plugin.Info.Version,
+	}
+	if user != nil && !user.IsNil() {
+		pCtx.OrgID = user.GetOrgID()
+		pCtx.User = adapters.BackendUserFromSignedInUser(user)
+	}
+
+	datasourceSettings, err := adapters.ModelToInstanceSettings(ds, p.decryptSecureJsonDataFn(ctx))
+	if err != nil {
+		return pCtx, err
+	}
+	pCtx.DataSourceInstanceSettings = datasourceSettings
+
+	settings := p.pluginEnvVars.GetConfigMap(ctx, pluginID, plugin.ExternalService)
+	pCtx.GrafanaConfig = backend.NewGrafanaCfg(settings)
+
+	ua, err := useragent.New(p.cfg.BuildVersion, runtime.GOOS, runtime.GOARCH)
+	if err != nil {
+		p.logger.Warn("Could not create user agent", "error", err)
+	}
+	pCtx.UserAgent = ua
+
+	return pCtx, nil
+}
+
 func (p *Provider) appInstanceSettings(ctx context.Context, pluginID string, orgID int64) (*backend.AppInstanceSettings, error) {
 	jsonData := json.RawMessage{}
 	decryptedSecureJSONData := map[string]string{}

pkg/services/pluginsintegration/plugincontext/plugincontext_test.go

@@ -42,7 +42,7 @@ func TestGet(t *testing.T) {
 	ds := &fakeDatasources.FakeDataSourceService{}
 	db := &dbtest.FakeDB{ExpectedError: pluginsettings.ErrPluginSettingNotFound}
 	pcp := plugincontext.ProvideService(cfg, localcache.ProvideService(),
-		pluginstore.New(preg, &pluginFakes.FakeLoader{}),
+		pluginstore.New(preg, &pluginFakes.FakeLoader{}), &fakeDatasources.FakeCacheService{},
 		ds, pluginSettings.ProvideService(db, secretstest.NewFakeSecretsService()), pluginFakes.NewFakeLicensingService(), &config.Cfg{},
 	)
 	identity := &user.SignedInUser{OrgID: int64(1), Login: "admin"}

pkg/services/pluginsintegration/pluginsintegration.go

@@ -42,7 +42,6 @@ import (
 	"github.com/grafana/grafana/pkg/services/pluginsintegration/licensing"
 	"github.com/grafana/grafana/pkg/services/pluginsintegration/loader"
 	"github.com/grafana/grafana/pkg/services/pluginsintegration/pipeline"
-	"github.com/grafana/grafana/pkg/services/pluginsintegration/plugincontext"
 	"github.com/grafana/grafana/pkg/services/pluginsintegration/pluginerrs"
 	"github.com/grafana/grafana/pkg/services/pluginsintegration/pluginsettings"
 	pluginSettings "github.com/grafana/grafana/pkg/services/pluginsintegration/pluginsettings/service"
@@ -94,7 +93,6 @@ var WireSet = wire.NewSet(
 	wire.Bind(new(registry.Service), new(*registry.InMemory)),
 	repo.ProvideService,
 	wire.Bind(new(repo.Service), new(*repo.Manager)),
-	plugincontext.ProvideService,
 	licensing.ProvideLicensing,
 	wire.Bind(new(plugins.Licensing), new(*licensing.Service)),
 	wire.Bind(new(sources.Registry), new(*sources.Service)),