Merge pull request #3130 from urbit/lf/base-hash

interface: show base hash

pkg/arvo/app/file-server.hoon

@@ -223,7 +223,28 @@
   ==
 ::
 ++  on-leave  on-leave:def
-++  on-peek   on-peek:def
+++  on-peek   
+  |=  =path
+  ^-  (unit (unit cage))
+  |^
+  ?+  path  (on-peek:def path)
+    [%x %clay %base %hash ~]  ``hash+!>(base-hash)
+  ==
+  ::  stolen from +trouble
+  ::  TODO: move to a lib?
+  ++  base-hash
+    ^-  @uv
+    =+  .^  ota=(unit [=ship =desk =aeon:clay])
+            %gx  /(scot %p our.bowl)/hood/(scot %da now.bowl)/kiln/ota/noun
+        ==
+    ?~  ota
+      *@uv
+    =/  parent  (scot %p ship.u.ota)
+    =+  .^(=cass:clay %cs /[parent]/[desk.u.ota]/1/late/foo)
+    %^  end  3  3
+    .^(@uv %cz /[parent]/[desk.u.ota]/(scot %ud ud.cass))
+  --
+  
 ++  on-agent  on-agent:def
 ++  on-fail   on-fail:def
 --

pkg/arvo/app/hood.hoon

@@ -41,7 +41,6 @@
 ++  on-leave  on-leave:def
 ++  on-peek
   |=  =path
-  ~&  peeking=path
   ^-  (unit (unit cage))
   ?+  path  (on-peek:def path)
     [* %kiln *]  (on-peek:kiln-core path)

pkg/arvo/mar/hash.hoon

@@ -0,0 +1,14 @@
+|_  hash=@uv
+::
+++  grad  %noun
+++  grow
+  |%
+  ++  noun  hash
+  ++  json
+    s+(rsh 3 2 (scot %uv hash))
+  --
+++  grab
+  |%
+  ++  noun  @uv
+  --
+--

pkg/interface/src/App.js

@@ -61,6 +61,7 @@ export default class App extends React.Component {
 
   componentDidMount() {
     this.subscription.start();
+    this.api.local.getBaseHash();
   }
 
   render() {

pkg/interface/src/api/base.ts

@@ -53,4 +53,8 @@ export default class BaseApi<S extends object = {}> {
       );
     });
   }
+
+  scry<T>(app: string, path: Path): Promise<T> {
+    return fetch(`/~/scry/${app}${path}.json`).then(r => r.json() as Promise<T>);
+  }
 }

pkg/interface/src/api/local.ts

@@ -2,9 +2,13 @@ import BaseApi from "./base";
 import { StoreState } from "../store/type";
 import { SelectedGroup } from "../types/local-update";
 
-
-
 export default class LocalApi extends BaseApi<StoreState> {
+  getBaseHash() {
+    this.scry<string>('file-server', '/clay/base/hash').then(baseHash => {
+      this.store.handleEvent({ data: { local: { baseHash } } });
+    });
+  }
+
   setSelected(selected: SelectedGroup[]) {
     this.store.handleEvent({
       data: {

pkg/interface/src/apps/launch/app.js

@@ -24,6 +24,7 @@ export default class LaunchApp extends React.Component {
     const { props } = this;
 
     return (
+      <div className="h-100 flex flex-column h-100">
       <div className='v-mid ph2 dtc-m dtc-l dtc-xl flex justify-between flex-wrap' style={{ maxWidth: '40rem' }}>
         <Welcome firstTime={props.launch.firstTime} api={props.api} />
         <Tiles
@@ -34,6 +35,8 @@ export default class LaunchApp extends React.Component {
           weather={props.weather}
         />
       </div>
+      <div className="gray2-d gray2 ml4 mb4 f8"> {props.baseHash} </div>
+    </div>
     );
   }
 }

pkg/interface/src/reducers/local.ts

@@ -3,7 +3,7 @@ import { StoreState } from '../store/type';
 import { Cage } from '../types/cage';
 import { LocalUpdate } from '../types/local-update';
 
-type LocalState = Pick<StoreState, 'sidebarShown' | 'selectedGroups'>;
+type LocalState = Pick<StoreState, 'sidebarShown' | 'selectedGroups' | 'baseHash'>;
 
 export default class LocalReducer<S extends LocalState> {
     reduce(json: Cage, state: S) {
@@ -11,8 +11,14 @@ export default class LocalReducer<S extends LocalState> {
         if (data) {
             this.sidebarToggle(data, state);
             this.setSelected(data, state);
+            this.baseHash(data, state);
         }
     }
+    baseHash(obj: LocalUpdate, state: S) {
+      if ('baseHash' in obj) {
+        state.baseHash = obj.baseHash;
+      }
+    }
 
     sidebarToggle(obj: LocalUpdate, state: S) {
       if ('sidebarToggle' in obj) {

pkg/interface/src/store/store.ts

@@ -38,6 +38,7 @@ export default class GlobalStore extends BaseStore<StoreState> {
       pendingMessages: new Map(),
       chatInitialized: false,
       sidebarShown: true,
+      baseHash: null,
       invites: {},
       associations: {
         chat: {},

pkg/interface/src/store/type.ts

@@ -16,6 +16,7 @@ export interface StoreState {
   // local state
   sidebarShown: boolean;
   selectedGroups: SelectedGroup[];
+  baseHash: string | null;
   // invite state
   invites: Invites;
   // metadata state

pkg/interface/src/types/local-update.ts

@@ -2,7 +2,8 @@ import { Path } from './noun';
 
 export type LocalUpdate =
   LocalUpdateSidebarToggle
-| LocalUpdateSelectedGroups;
+| LocalUpdateSelectedGroups
+| LocalUpdateBaseHash;
 
 interface LocalUpdateSidebarToggle {
   sidebarToggle: boolean;
@@ -12,4 +13,8 @@ interface LocalUpdateSelectedGroups {
   selected: SelectedGroup[];
 }
 
+interface LocalUpdateBaseHash {
+  baseHash: string;
+}
+
 export type SelectedGroup = [Path, string];