add generic metadata selector

dist/bundle.es.js

@@ -1231,6 +1231,10 @@ const makeSelectMetadataForUri = uri => reselect.createSelector(makeSelectClaimF
   return metadata || (claim === undefined ? undefined : null);
 });
 
+const makeSelectMetadataItemForUri = (uri, key) => reselect.createSelector(makeSelectMetadataForUri(uri), metadata => {
+  return metadata ? metadata[key] : undefined;
+});
+
 const makeSelectTitleForUri = uri => reselect.createSelector(makeSelectMetadataForUri(uri), metadata => metadata && metadata.title);
 
 const makeSelectContentTypeForUri = uri => reselect.createSelector(makeSelectClaimForUri(uri), claim => {
@@ -3496,6 +3500,7 @@ exports.makeSelectFirstRecommendedFileForUri = makeSelectFirstRecommendedFileFor
 exports.makeSelectIsUriResolving = makeSelectIsUriResolving;
 exports.makeSelectLoadingForUri = makeSelectLoadingForUri;
 exports.makeSelectMetadataForUri = makeSelectMetadataForUri;
+exports.makeSelectMetadataItemForUri = makeSelectMetadataItemForUri;
 exports.makeSelectNsfwCountForChannel = makeSelectNsfwCountForChannel;
 exports.makeSelectNsfwCountFromUris = makeSelectNsfwCountFromUris;
 exports.makeSelectPendingByUri = makeSelectPendingByUri;

src/index.js

@@ -110,6 +110,9 @@ export {
   makeSelectFetchingChannelClaims,
   makeSelectClaimsInChannelForPage,
   makeSelectMetadataForUri,
+  makeSelectMetadataItemForUri,
+  makeSelectThumbnailForUri,
+  makeSelectCoverForUri,
   makeSelectTitleForUri,
   makeSelectContentTypeForUri,
   makeSelectIsUriResolving,
@@ -144,8 +147,6 @@ export {
   selectPlayingUri,
   selectChannelClaimCounts,
   selectCurrentChannelPage,
-  makeSelectThumbnailForUri,
-  makeSelectCoverForUri,
 } from 'redux/selectors/claims';
 
 export {

src/redux/selectors/claims.js

@@ -172,6 +172,14 @@ export const makeSelectMetadataForUri = (uri: string) =>
     }
   );
 
+export const makeSelectMetadataItemForUri = (uri: string, key: string) =>
+  createSelector(
+    makeSelectMetadataForUri(uri),
+    (metadata: ChannelMetadata | StreamMetadata) => {
+      return metadata ? metadata[key] : undefined;
+    }
+  );
+
 export const makeSelectTitleForUri = (uri: string) =>
   createSelector(
     makeSelectMetadataForUri(uri),