(Server) Add Context to Manipulate Route State

Summary:
This diff added dummy state handler for route, which appeared in the next diffs. Routes will be used to render components for mocking handler and determine data on the client side.

State and other variables will appear on the next diffs.

Note:
- This is a part of this PR: https://github.com/facebook/flipper/pull/488

Reviewed By: mweststrate

Differential Revision: D20440150

fbshipit-source-id: d441ae1d53caf7280bef78d937aaa71617e2da9f

desktop/plugins/network/index.tsx

@@ -9,7 +9,7 @@
 
 import {TableHighlightedRows, TableRows, TableBodyRow} from 'flipper';
 import {padStart} from 'lodash';
-import React from 'react';
+import React, {createContext} from 'react';
 import {MenuItemConstructorOptions} from 'electron';
 
 import {
@@ -25,7 +25,7 @@ import {
   SearchableTable,
   FlipperPlugin,
 } from 'flipper';
-import {Request, RequestId, Response} from './types';
+import {Request, RequestId, Response, Route} from './types';
 import {convertRequestToCurlCommand, getHeaderValue, decodeBody} from './utils';
 import RequestDetails from './RequestDetails';
 import {clipboard} from 'electron';
@@ -90,12 +90,27 @@ const TextEllipsis = styled(Text)({
   paddingTop: 4,
 });
 
+// State management
+export interface NetworkRouteManager {
+  addRoute(): void;
+  modifyRoute(id: string, routeChange: Partial<Route>): void;
+  removeRoute(id: string): void;
+}
+const nullNetworkRouteManager: NetworkRouteManager = {
+  addRoute() {},
+  modifyRoute(_id: string, _routeChange: Partial<Route>) {},
+  removeRoute(_id: string) {},
+};
+export const NetworkRouteContext = createContext<NetworkRouteManager>(
+  nullNetworkRouteManager,
+);
+
 export default class extends FlipperPlugin<State, any, PersistedState> {
   static keyboardActions: Array<DefaultKeyboardAction> = ['clear'];
   static subscribed = [];
   static defaultPersistedState = {
-    requests: new Map(),
-    responses: new Map(),
+    requests: {},
+    responses: {},
   };
 
   static metricsReducer(persistedState: PersistedState) {
@@ -238,18 +253,20 @@ export default class extends FlipperPlugin<State, any, PersistedState> {
 
     return (
       <FlexColumn grow={true}>
-        <NetworkTable
-          requests={requests || {}}
-          responses={responses || {}}
-          clear={this.clearLogs}
-          copyRequestCurlCommand={this.copyRequestCurlCommand}
-          onRowHighlighted={this.onRowHighlighted}
-          highlightedRows={
-            this.state.selectedIds ? new Set(this.state.selectedIds) : null
-          }
-          searchTerm={this.state.searchTerm}
-        />
-        <DetailSidebar width={500}>{this.renderSidebar()}</DetailSidebar>
+        <NetworkRouteContext.Provider value={nullNetworkRouteManager}>
+          <NetworkTable
+            requests={requests || {}}
+            responses={responses || {}}
+            clear={this.clearLogs}
+            copyRequestCurlCommand={this.copyRequestCurlCommand}
+            onRowHighlighted={this.onRowHighlighted}
+            highlightedRows={
+              this.state.selectedIds ? new Set(this.state.selectedIds) : null
+            }
+            searchTerm={this.state.searchTerm}
+          />
+          <DetailSidebar width={500}>{this.renderSidebar()}</DetailSidebar>
+        </NetworkRouteContext.Provider>
       </FlexColumn>
     );
   }