react/sagas/show_channel.js

@@ -1,10 +1,18 @@
-import { call, put, takeLatest } from 'redux-saga/effects';
+import {call, put, select, takeLatest} from 'redux-saga/effects';
 import * as actions from 'constants/show_action_types';
 import { addNewChannelToChannelList, addRequestToRequestList, onRequestError, updateChannelClaims } from 'actions/show';
 import { getChannelClaims, getChannelData } from 'api/channelApi';
+import { selectShowState } from 'selectors/show';
 
 function* getNewChannelAndUpdateChannelList (action) {
   const { requestId, channelName, channelId } = action.data;
+  const state = yield select(selectShowState);
+  // is this an existing request?
+  // If this uri is in the request list, it's already been fetched
+  if (state.requestList[requestId]) {
+    console.log('that request already exists in the request list!');
+    return null;
+  }
   // get channel long id
   console.log('getting channel long id and short id');
   let longId, shortId;
@@ -16,6 +24,12 @@ function* getNewChannelAndUpdateChannelList (action) {
   // store the request in the channel requests list
   const channelKey = `c#${channelName}#${longId}`;
   yield put(addRequestToRequestList(requestId, null, channelKey));
+  // is this an existing channel?
+  // If this channel is in the channel list, it's already been fetched
+  if (state.channelList[channelKey]) {
+    console.log('that channel already exists in the channel list!');
+    return null;
+  }
   // get channel claims data
   console.log('getting channel claims data');
   let claimsData;