PanelLibrary: Adds api and db to create Library/Shared/Reusable Panel (#29642)

* PanelLibrary: Adds panellib table

* Refactor: removes drop table migration

* Refactor: fixes spelling mistake

* Refactor: changes after PR comments

* Refactor: some more renames

* PanelLibrary: Adds api and db to create Library/Shared/Reusable Panel

* Refactor: reverts SqlStore change and uses RegisterOverride instead

* Refactor: fixes lint error

* Refactor: fixes imports

* Refactor: reverts unintentional changes

* Refactor: Adds repository

* Revert "Refactor: Adds repository"

This reverts commit 4c46e8a6c4.

* Refactor: changes after PR comments

* Refactor: Simplfies further

* Chore: fixes linting

* Chore: Changes after PR comments

* Update pkg/services/librarypanels/api.go

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>

* Chore: fixes import after commited suggestion

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>

pkg/api/common.go

@@ -17,6 +17,8 @@ var (
 
 type Response interface {
 	WriteTo(ctx *models.ReqContext)
+	// Status gets the response's status.
+	Status() int
 }
 
 type NormalResponse struct {
@@ -41,6 +43,11 @@ func Wrap(action interface{}) macaron.Handler {
 	}
 }
 
+// Status gets the response's status.
+func (r *NormalResponse) Status() int {
+	return r.status
+}
+
 func (r *NormalResponse) WriteTo(ctx *models.ReqContext) {
 	if r.err != nil {
 		ctx.Logger.Error(r.errMessage, "error", r.err, "remote_addr", ctx.RemoteAddr())

pkg/registry/registry.go

@@ -65,6 +65,10 @@ func RegisterOverride(fn OverrideServiceFunc) {
 	overrides = append(overrides, fn)
 }
 
+func ClearOverrides() {
+	overrides = nil
+}
+
 func getServicesWithOverrides() []*Descriptor {
 	slice := []*Descriptor{}
 	for _, s := range services {

pkg/services/librarypanels/api.go

@@ -0,0 +1,36 @@
+package librarypanels
+
+import (
+	"errors"
+
+	"github.com/go-macaron/binding"
+	"github.com/grafana/grafana/pkg/api"
+	"github.com/grafana/grafana/pkg/api/routing"
+	"github.com/grafana/grafana/pkg/middleware"
+	"github.com/grafana/grafana/pkg/models"
+	"github.com/grafana/grafana/pkg/util"
+)
+
+func (lps *LibraryPanelService) registerAPIEndpoints() {
+	if !lps.IsEnabled() {
+		return
+	}
+
+	lps.RouteRegister.Group("/api/library-panels", func(libraryPanels routing.RouteRegister) {
+		libraryPanels.Post("/", middleware.ReqSignedIn, binding.Bind(addLibraryPanelCommand{}), api.Wrap(lps.createHandler))
+	})
+}
+
+// createHandler handles POST /api/library-panels.
+func (lps *LibraryPanelService) createHandler(c *models.ReqContext, cmd addLibraryPanelCommand) api.Response {
+	panel, err := lps.createLibraryPanel(c, cmd)
+
+	if err != nil {
+		if errors.Is(err, errLibraryPanelAlreadyAdded) {
+			return api.Error(400, errLibraryPanelAlreadyAdded.Error(), err)
+		}
+		return api.Error(500, "Failed to create library panel", err)
+	}
+
+	return api.JSON(200, util.DynMap{"panel": panel})
+}

pkg/services/librarypanels/database.go

@@ -0,0 +1,41 @@
+package librarypanels
+
+import (
+	"context"
+	"time"
+
+	"github.com/grafana/grafana/pkg/models"
+
+	"github.com/grafana/grafana/pkg/services/sqlstore"
+)
+
+// createLibraryPanel function adds a LibraryPanel
+func (lps *LibraryPanelService) createLibraryPanel(c *models.ReqContext, cmd addLibraryPanelCommand) (LibraryPanel, error) {
+	libraryPanel := LibraryPanel{
+		OrgID:    c.SignedInUser.OrgId,
+		FolderID: cmd.FolderID,
+		Title:    cmd.Title,
+		Model:    cmd.Model,
+
+		Created: time.Now(),
+		Updated: time.Now(),
+
+		CreatedBy: c.SignedInUser.UserId,
+		UpdatedBy: c.SignedInUser.UserId,
+	}
+
+	err := lps.SQLStore.WithTransactionalDbSession(context.Background(), func(session *sqlstore.DBSession) error {
+		if res, err := session.Query("SELECT 1 from library_panel WHERE org_id=? and folder_id=? and title=?", c.SignedInUser.OrgId, cmd.FolderID, cmd.Title); err != nil {
+			return err
+		} else if len(res) == 1 {
+			return errLibraryPanelAlreadyAdded
+		}
+
+		if _, err := session.Insert(&libraryPanel); err != nil {
+			return err
+		}
+		return nil
+	})
+
+	return libraryPanel, err
+}

pkg/services/librarypanels/librarypanels.go

@@ -1,16 +1,20 @@
 package librarypanels
 
 import (
+	"github.com/grafana/grafana/pkg/api/routing"
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/registry"
+	"github.com/grafana/grafana/pkg/services/sqlstore"
 	"github.com/grafana/grafana/pkg/services/sqlstore/migrator"
 	"github.com/grafana/grafana/pkg/setting"
 )
 
 // LibraryPanelService is the service for the Panel Library feature.
 type LibraryPanelService struct {
-	Cfg *setting.Cfg `inject:""`
-	log log.Logger
+	Cfg           *setting.Cfg          `inject:""`
+	SQLStore      *sqlstore.SQLStore    `inject:""`
+	RouteRegister routing.RouteRegister `inject:""`
+	log           log.Logger
 }
 
 func init() {
@@ -18,25 +22,27 @@ func init() {
 }
 
 // Init initializes the LibraryPanel service
-func (pl *LibraryPanelService) Init() error {
-	pl.log = log.New("library_panel")
+func (lps *LibraryPanelService) Init() error {
+	lps.log = log.New("librarypanels")
+
+	lps.registerAPIEndpoints()
 
 	return nil
 }
 
 // IsEnabled returns true if the Panel Library feature is enabled for this instance.
-func (pl *LibraryPanelService) IsEnabled() bool {
-	if pl.Cfg == nil {
+func (lps *LibraryPanelService) IsEnabled() bool {
+	if lps.Cfg == nil {
 		return false
 	}
 
-	return pl.Cfg.IsPanelLibraryEnabled()
+	return lps.Cfg.IsPanelLibraryEnabled()
 }
 
 // AddMigration defines database migrations.
 // If Panel Library is not enabled does nothing.
-func (pl *LibraryPanelService) AddMigration(mg *migrator.Migrator) {
-	if !pl.IsEnabled() {
+func (lps *LibraryPanelService) AddMigration(mg *migrator.Migrator) {
+	if !lps.IsEnabled() {
 		return
 	}
 
@@ -47,7 +53,7 @@ func (pl *LibraryPanelService) AddMigration(mg *migrator.Migrator) {
 			{Name: "org_id", Type: migrator.DB_BigInt, Nullable: false},
 			{Name: "folder_id", Type: migrator.DB_BigInt, Nullable: false},
 			{Name: "title", Type: migrator.DB_NVarchar, Length: 255, Nullable: false},
-			{Name: "data", Type: migrator.DB_Text, Nullable: false},
+			{Name: "model", Type: migrator.DB_Text, Nullable: false},
 			{Name: "created", Type: migrator.DB_DateTime, Nullable: false},
 			{Name: "created_by", Type: migrator.DB_BigInt, Nullable: false},
 			{Name: "updated", Type: migrator.DB_DateTime, Nullable: false},

pkg/services/librarypanels/librarypanels_test.go

@@ -0,0 +1,100 @@
+package librarypanels
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/grafana/grafana/pkg/models"
+	"github.com/grafana/grafana/pkg/registry"
+	"github.com/grafana/grafana/pkg/services/sqlstore"
+	"github.com/grafana/grafana/pkg/setting"
+)
+
+func TestCreateLibraryPanel(t *testing.T) {
+	t.Run("should fail if library panel already exists", func(t *testing.T) {
+		lps, context := setupTestEnv(t, models.ROLE_EDITOR)
+		command := addLibraryPanelCommand{
+			FolderID: 1,
+			Title:    "Text - Library Panel",
+			Model: []byte(`
+	{
+      "datasource": "${DS_GDEV-TESTDATA}",
+      "id": 1,
+      "title": "Text - Library Panel",
+      "type": "text"
+    }
+`),
+		}
+
+		response := lps.createHandler(&context, command)
+		require.Equal(t, 200, response.Status())
+
+		response = lps.createHandler(&context, command)
+		require.Equal(t, 400, response.Status())
+
+		t.Cleanup(registry.ClearOverrides)
+	})
+}
+
+func setupMigrations(cfg *setting.Cfg) LibraryPanelService {
+	lps := LibraryPanelService{
+		SQLStore: nil,
+		Cfg:      cfg,
+	}
+
+	overrideServiceFunc := func(d registry.Descriptor) (*registry.Descriptor, bool) {
+		descriptor := registry.Descriptor{
+			Name:         "LibraryPanelService",
+			Instance:     &lps,
+			InitPriority: 0,
+		}
+
+		return &descriptor, true
+	}
+
+	registry.RegisterOverride(overrideServiceFunc)
+
+	return lps
+}
+
+func setupTestEnv(t *testing.T, orgRole models.RoleType) (LibraryPanelService, models.ReqContext) {
+	cfg := setting.NewCfg()
+	cfg.FeatureToggles = map[string]bool{"panelLibrary": true}
+
+	service := setupMigrations(cfg)
+
+	sqlStore := sqlstore.InitTestDB(t)
+	service.SQLStore = sqlStore
+
+	user := models.SignedInUser{
+		UserId:         1,
+		OrgId:          1,
+		OrgName:        "",
+		OrgRole:        orgRole,
+		Login:          "",
+		Name:           "",
+		Email:          "",
+		ApiKeyId:       0,
+		OrgCount:       0,
+		IsGrafanaAdmin: false,
+		IsAnonymous:    false,
+		HelpFlags1:     0,
+		LastSeenAt:     time.Now(),
+		Teams:          nil,
+	}
+
+	context := models.ReqContext{
+		Context:        nil,
+		SignedInUser:   &user,
+		UserToken:      nil,
+		IsSignedIn:     false,
+		IsRenderCall:   false,
+		AllowAnonymous: false,
+		SkipCache:      false,
+		Logger:         nil,
+	}
+
+	return service, context
+}

pkg/services/librarypanels/models.go

@@ -0,0 +1,36 @@
+package librarypanels
+
+import (
+	"encoding/json"
+	"fmt"
+	"time"
+)
+
+// LibraryPanel is the model for library panel definitions.
+type LibraryPanel struct {
+	ID       int64 `xorm:"pk autoincr 'id'"`
+	OrgID    int64 `xorm:"org_id"`
+	FolderID int64 `xorm:"folder_id"`
+	Title    string
+	Model    json.RawMessage
+
+	Created time.Time
+	Updated time.Time
+
+	CreatedBy int64
+	UpdatedBy int64
+}
+
+var (
+	// errLibraryPanelAlreadyAdded is an error when you add a library panel that already exists.
+	errLibraryPanelAlreadyAdded = fmt.Errorf("library panel with that title already exists")
+)
+
+// Commands
+
+// addLibraryPanelCommand is the command for adding a LibraryPanel
+type addLibraryPanelCommand struct {
+	FolderID int64           `json:"folderId"`
+	Title    string          `json:"title"`
+	Model    json.RawMessage `json:"model"`
+}