Frontend: Foundations for multi tenant frontend (#78815)

* Frontend: Foundations for multi tenant frontend * improve manifest parsing for multi-tenant frontend (#78876) * add test * add test * ?? * Updates * Added cache * test cleanup * lint * fix test * fix error templates * cleanup * remove copy * revert changes to list testdata * comment cleanup * prepare integration tests * Remove integrety --------- Co-authored-by: Ryan McKinley <ryantxu@gmail.com>
2023-12-05 08:34:22 +01:00
parent 7b78061235
commit ed128ea964
21 changed files with 1861 additions and 124 deletions
@@ -0,0 +1,91 @@
+package webassets
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/grafana/grafana/pkg/api/dtos"
+	"github.com/grafana/grafana/pkg/setting"
+)
+
+type ManifestInfo struct {
+	FilePath  string `json:"src,omitempty"`
+	Integrity string `json:"integrity,omitempty"`
+
+	// The known entrypoints
+	App   *EntryPointInfo `json:"app,omitempty"`
+	Dark  *EntryPointInfo `json:"dark,omitempty"`
+	Light *EntryPointInfo `json:"light,omitempty"`
+}
+
+type EntryPointInfo struct {
+	Assets struct {
+		JS  []string `json:"js,omitempty"`
+		CSS []string `json:"css,omitempty"`
+	} `json:"assets,omitempty"`
+}
+
+var entryPointAssetsCache *dtos.EntryPointAssets = nil
+
+func GetWebAssets(cfg *setting.Cfg) (*dtos.EntryPointAssets, error) {
+	if cfg.Env != setting.Dev && entryPointAssetsCache != nil {
+		return entryPointAssetsCache, nil
+	}
+
+	result, err := readWebAssets(filepath.Join(cfg.StaticRootPath, "build", "assets-manifest.json"))
+	entryPointAssetsCache = result
+
+	return entryPointAssetsCache, err
+}
+
+func readWebAssets(manifestpath string) (*dtos.EntryPointAssets, error) {
+	//nolint:gosec
+	bytes, err := os.ReadFile(manifestpath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to load assets-manifest.json %w", err)
+	}
+
+	manifest := map[string]ManifestInfo{}
+	err = json.Unmarshal(bytes, &manifest)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read assets-manifest.json %w", err)
+	}
+
+	integrity := make(map[string]string, 100)
+	for _, v := range manifest {
+		if v.Integrity != "" && v.FilePath != "" {
+			integrity[v.FilePath] = v.Integrity
+		}
+	}
+
+	entryPoints, ok := manifest["entrypoints"]
+	if !ok {
+		return nil, fmt.Errorf("could not find entrypoints in asssets-manifest")
+	}
+
+	if entryPoints.App == nil || len(entryPoints.App.Assets.JS) == 0 {
+		return nil, fmt.Errorf("missing app entry")
+	}
+	if entryPoints.Dark == nil || len(entryPoints.Dark.Assets.CSS) == 0 {
+		return nil, fmt.Errorf("missing dark entry")
+	}
+	if entryPoints.Light == nil || len(entryPoints.Light.Assets.CSS) == 0 {
+		return nil, fmt.Errorf("missing light entry")
+	}
+
+	entryPointJSAssets := make([]dtos.EntryPointAsset, 0)
+	for _, entry := range entryPoints.App.Assets.JS {
+		entryPointJSAssets = append(entryPointJSAssets, dtos.EntryPointAsset{
+			FilePath:  entry,
+			Integrity: integrity[entry],
+		})
+	}
+
+	return &dtos.EntryPointAssets{
+		JSFiles:  entryPointJSAssets,
+		CSSDark:  entryPoints.Dark.Assets.CSS[0],
+		CSSLight: entryPoints.Light.Assets.CSS[0],
+	}, nil
+}