Revision history: change sets + revisions + revert — the undo substrate (#48) (#61)

Co-authored-by: Steve Dudenhoeffer <[email protected]>

internal/api/api.go

@@ -81,8 +81,9 @@ func New(cfg *config.Config, svc *service.Service) *gin.Engine {
 	gardens.GET("/:id", h.getGarden)
 	gardens.PATCH("/:id", h.updateGarden)
 	gardens.DELETE("/:id", h.deleteGarden)
-	gardens.POST("/:id/copy", h.copyGarden)   // duplicate a garden the actor owns
-	gardens.GET("/:id/full", h.getGardenFull) // one-shot editor load
+	gardens.POST("/:id/copy", h.copyGarden)         // duplicate a garden the actor owns
+	gardens.GET("/:id/full", h.getGardenFull)       // one-shot editor load
+	gardens.GET("/:id/history", h.getGardenHistory) // change sets, newest first
 	gardens.POST("/:id/objects", h.createObject)
 
 	// Sharing (owner-managed; a recipient may remove their own share).
@@ -111,6 +112,11 @@ func New(cfg *config.Config, svc *service.Service) *gin.Engine {
 	plantings.PATCH("/:id", h.updatePlanting)
 	plantings.DELETE("/:id", h.deletePlanting)
 
+	// Undo. A change set is addressed by its own id; the service resolves the
+	// owning garden for the permission check, same as objects and plantings.
+	changeSets := v1.Group("/change-sets", h.requireAuth())
+	changeSets.POST("/:id/revert", h.revertChangeSet)
+
 	// Plant catalog: built-ins (seeded, read-only) plus the actor's own rows.
 	plants := v1.Group("/plants", h.requireAuth())
 	plants.GET("", h.listPlants)