Reduce unnecessary api calls

src/renderer/page/file/index.js

@@ -14,6 +14,7 @@ import { makeSelectCostInfoForUri } from 'redux/selectors/cost_info';
 import { selectShowNsfw } from 'redux/selectors/settings';
 import FilePage from './view';
 import { makeSelectCurrentParam } from 'redux/selectors/navigation';
+import { selectSubscriptions } from 'redux/selectors/subscriptions';
 
 const select = (state, props) => ({
   claim: makeSelectClaimForUri(props.uri)(state),
@@ -24,6 +25,7 @@ const select = (state, props) => ({
   tab: makeSelectCurrentParam('tab')(state),
   fileInfo: makeSelectFileInfoForUri(props.uri)(state),
   rewardedContentClaimIds: selectRewardContentClaimIds(state, props),
+  subscriptions: selectSubscriptions(state),
 });
 
 const perform = dispatch => ({

src/renderer/page/file/view.jsx

@@ -37,19 +37,25 @@ class FilePage extends React.PureComponent {
   }
 
   checkSubscriptionLatest(props) {
-    props.checkSubscriptionLatest(
-      {
-        channelName: props.claim.channel_name,
-        uri: buildURI(
-          {
-            contentName: props.claim.channel_name,
-            claimId: props.claim.value.publisherSignature.certificateId,
-          },
-          false
-        ),
-      },
-      buildURI({ contentName: props.claim.name, claimId: props.claim.claim_id }, false)
-    );
+    if (
+      props.subscriptions
+        .map(subscription => subscription.channelName)
+        .indexOf(props.claim.channel_name) !== -1
+    ) {
+      props.checkSubscriptionLatest(
+        {
+          channelName: props.claim.channel_name,
+          uri: buildURI(
+            {
+              contentName: props.claim.channel_name,
+              claimId: props.claim.value.publisherSignature.certificateId,
+            },
+            false
+          ),
+        },
+        buildURI({ contentName: props.claim.name, claimId: props.claim.claim_id }, false)
+      );
+    }
   }
 
   render() {