feat(protocol-designer): place tipracks on protocol creation (#2750)

By default, when a user creates a protocol, one tip rack for each given mount should be placed on
the deck.

Closes #1327

protocol-designer/src/labware-ingred/reducers/index.js

@@ -32,7 +32,7 @@ import type {
 import * as actions from '../actions'
 import {getPDMetadata} from '../../file-types'
 import type {BaseState, Options} from '../../types'
-import type {LoadFileAction} from '../../load-file'
+import type {LoadFileAction, NewProtocolFields} from '../../load-file'
 import type {
   RemoveWellsContents,
   DeleteLiquidGroup,
@@ -195,6 +195,27 @@ export const containers = handleActions({
       }
     }, {})
   },
+  CREATE_NEW_PROTOCOL: (
+    state: ContainersState,
+    action: {payload: NewProtocolFields}
+  ): ContainersState => {
+    const initialTipracks = [action.payload.left, action.payload.right].reduce((acc, mount) => {
+      if (mount.tiprackModel) {
+        const id = `${uuid()}:${String(mount.tiprackModel)}`
+        return {
+          ...acc,
+          [id]: {
+            slot: nextEmptySlot(_loadedContainersBySlot(acc || {})),
+            type: mount.tiprackModel,
+            disambiguationNumber: getNextDisambiguationNumber(acc || {}, String(mount.tiprackModel)),
+            id,
+            name: null, // create with null name, so we force explicit naming.
+          },
+        }
+      }
+    }, state)
+    return initialTipracks || {}
+  },
 }, initialLabwareState)
 
 type SavedLabwareState = {[labwareId: string]: boolean}