Add contextual metadata to asset response

Author: kjarmicki-cloudinary

api/admin/asset.go

@@ -93,6 +93,7 @@ type AssetResult struct {
 	CinemagraphAnalysis   CinemagraphAnalysisResult   `json:"cinemagraph_analysis"`
 	Usage                 interface{}                 `json:"usage"`
 	OriginalFilename      string                      `json:"original_filename"`
+	Context               AssetContextResult          `json:"context,omitempty"`
 	Error                 api.ErrorResp               `json:"error,omitempty"`
 	Response              interface{}
 }
@@ -142,6 +143,11 @@ type PredominantResult struct {
 	Cloudinary [][]interface{} `json:"cloudinary"`
 }
 
+// AssetContextResult contains the contextual metadata
+type AssetContextResult struct {
+	Custom map[string]string `json:"custom,omitempty"`
+}
+
 // UpdateAssetParams are the parameters for UpdateAsset.
 type UpdateAssetParams struct {
 	AssetType         api.AssetType        `json:"-"`