fix(workbench): history transform views need to work as well

switching to representing transforms as just strings (instead of an object with a scriptBytes path)
as per @ramfox's suggestion. We might need the `syntax` field in a transform at some point, but
that time isn't coming until we support transforms other than starlark. Shouldn't be for a while.

app/components/workbench/DatasetComponent.tsx

@@ -242,7 +242,7 @@ export const DatasetComponent: React.FunctionComponent<DatasetComponentProps> =
         >
           <div className='transition-wrap'>
             <Transform
-              data={data.transform}
+              data={data.transform || ''}
               qriRef={qriRef}
             />
           </div>

app/components/workbench/Transform.tsx

@@ -2,23 +2,22 @@ import * as React from 'react'
 import { connect } from 'react-redux'
 import { bindActionCreators, Dispatch } from 'redux'
 
-import { Transform } from '../../models/dataset'
 import Store from '../../models/store'
 import { QriRef } from '../../models/qriRef'
 import { fsiWrite } from '../../actions/api'
 import Code from '../Code'
 
 export interface TransformProps {
-  data: Transform
+  data: string
   qriRef: QriRef
 
   // TODO (b5) - work in progress
   dryRun?: () => void
 }
 
-export const TransformComponent: React.FunctionComponent<TransformProps> = ({ data }) => {
-  return <Code data={data.scriptBytes || ''} />
-}
+export const TransformComponent: React.FC<TransformProps> = ({ data = '' }) => (
+  <Code data={data} />
+)
 
 const mapStateToProps = (state: Store, ownProps: TransformProps) => {
   return ownProps

app/models/dataset.ts

@@ -79,19 +79,14 @@ export interface Structure {
 
 export type Schema = JSONSchema7
 
-export interface Transform {
-  format?: string
-  scriptBytes?: string
-}
-
 export interface Dataset {
   meta?: Meta
   structure?: Structure
   body?: Body
   bodyPath?: string
   commit?: Commit
   readme?: string
-  transform?: Transform
+  transform?: string
   [key: string]: any
 }
 

app/reducers/commitDetail.ts

@@ -79,6 +79,9 @@ const commitDetailsReducer: Reducer = (state = initialState, action: AnyAction):
           },
           readme: {
             value: dataset.readme
+          },
+          transform: {
+            value: dataset && dataset.transform && dataset.transform.scriptBytes ? atob(dataset.transform.scriptBytes) : undefined
           }
         }
       }

app/reducers/workingDataset.ts

@@ -102,7 +102,7 @@ const workingDatasetsReducer: Reducer = (state = initialState, action: AnyAction
             value: dataset && dataset.structure ? dataset.structure : undefined
           },
           transform: {
-            value: dataset && dataset.transform ? { scriptBytes: atob(dataset.transform.scriptBytes) } : undefined
+            value: dataset && dataset.transform && dataset.transform.scriptBytes ? atob(dataset.transform.scriptBytes) : undefined
           }
         }
       }