Comments: enable 'enable_comments' flag

## Issue
Closes 6159 "Support Comments Enabled/Disabled for comment.List API"

## New behavior
- `disable-comments` tag will block the comments component entirely.
- `settings.commentsEnabled`:
  - When false, will pause comment fetching, posting and replying.
  - Any already-fetched comments will stay on screen (unless user reloads/F5).

flow-typed/Comment.js

@@ -41,6 +41,7 @@ declare type CommentsState = {
   fetchingModerationBlockList: boolean,
   blockingByUri: {},
   unBlockingByUri: {},
+  commentsDisabledChannelIds: Array<string>,
   settingsByChannelId: { [string]: PerChannelSettings }, // ChannelID -> settings
   fetchingSettings: boolean,
   fetchingBlockedWords: boolean,

ui/component/commentCreate/index.js

@@ -10,11 +10,13 @@ import { doOpenModal, doSetActiveChannel } from 'redux/actions/app';
 import { doCommentCreate } from 'redux/actions/comments';
 import { selectUserVerifiedEmail } from 'redux/selectors/user';
 import { selectActiveChannelClaim } from 'redux/selectors/app';
+import { makeSelectCommentsDisabledForUri } from 'redux/selectors/comments';
 import { doToast } from 'redux/actions/notifications';
 import { CommentCreate } from './view';
 
 const select = (state, props) => ({
   commentingEnabled: IS_WEB ? Boolean(selectUserVerifiedEmail(state)) : true,
+  commentsDisabledBySettings: makeSelectCommentsDisabledForUri(props.uri)(state),
   claim: makeSelectClaimForUri(props.uri)(state),
   channels: selectMyChannelClaims(state),
   isFetchingChannels: selectFetchingMyChannels(state),

ui/component/commentCreate/view.jsx

@@ -15,6 +15,7 @@ import WalletTipAmountSelector from 'component/walletTipAmountSelector';
 import CreditAmount from 'component/common/credit-amount';
 import ChannelThumbnail from 'component/channelThumbnail';
 import UriIndicator from 'component/uriIndicator';
+import Empty from 'component/common/empty';
 
 const COMMENT_SLOW_MODE_SECONDS = 5;
 
@@ -22,6 +23,7 @@ type Props = {
   uri: string,
   claim: StreamClaim,
   createComment: (string, string, string, ?string) => Promise<any>,
+  commentsDisabledBySettings: boolean,
   channels: ?Array<ChannelClaim>,
   onDoneReplying?: () => void,
   onCancelReplying?: () => void,
@@ -41,6 +43,7 @@ type Props = {
 export function CommentCreate(props: Props) {
   const {
     createComment,
+    commentsDisabledBySettings,
     claim,
     channels,
     onDoneReplying,
@@ -181,6 +184,10 @@ export function CommentCreate(props: Props) {
     setAdvancedEditor(!advancedEditor);
   }
 
+  if (commentsDisabledBySettings) {
+    return <Empty padded text={__('This channel has disabled comments on their page.')} />;
+  }
+
   if (!hasChannels) {
     return (
       <div

ui/component/commentsList/index.js

@@ -5,6 +5,7 @@ import {
   selectIsFetchingComments,
   makeSelectTotalCommentsCountForUri,
   selectOthersReactsById,
+  makeSelectCommentsDisabledForUri,
 } from 'redux/selectors/comments';
 import { doCommentList, doCommentReactList } from 'redux/actions/comments';
 import { selectUserVerifiedEmail } from 'redux/selectors/user';
@@ -18,14 +19,15 @@ const select = (state, props) => ({
   claimIsMine: makeSelectClaimIsMine(props.uri)(state),
   isFetchingComments: selectIsFetchingComments(state),
   commentingEnabled: IS_WEB ? Boolean(selectUserVerifiedEmail(state)) : true,
+  commentsDisabledBySettings: makeSelectCommentsDisabledForUri(props.uri)(state),
   fetchingChannels: selectFetchingMyChannels(state),
   reactionsById: selectOthersReactsById(state),
   activeChannelId: selectActiveChannelId(state),
 });
 
-const perform = dispatch => ({
-  fetchComments: uri => dispatch(doCommentList(uri)),
-  fetchReacts: uri => dispatch(doCommentReactList(uri)),
+const perform = (dispatch) => ({
+  fetchComments: (uri) => dispatch(doCommentList(uri)),
+  fetchReacts: (uri) => dispatch(doCommentReactList(uri)),
 });
 
 export default connect(select, perform)(CommentsList);

ui/component/commentsList/view.jsx

@@ -16,6 +16,7 @@ import Empty from 'component/common/empty';
 
 type Props = {
   comments: Array<Comment>,
+  commentsDisabledBySettings: boolean,
   fetchComments: (string) => void,
   fetchReacts: (string) => Promise<any>,
   uri: string,
@@ -35,6 +36,7 @@ function CommentList(props: Props) {
     fetchReacts,
     uri,
     comments,
+    commentsDisabledBySettings,
     claimIsMine,
     myChannels,
     isFetchingComments,
@@ -147,7 +149,9 @@ function CommentList(props: Props) {
   }
 
   // Default to newest first for apps that don't have comment reactions
-  const sortedComments = reactionsById ? sortComments({ comments, reactionsById, sort, isMyComment, justCommented }) : [];
+  const sortedComments = reactionsById
+    ? sortComments({ comments, reactionsById, sort, isMyComment, justCommented })
+    : [];
   const displayedComments = readyToDisplayComments
     ? prepareComments(sortedComments, linkedComment).slice(start, end)
     : [];
@@ -212,7 +216,7 @@ function CommentList(props: Props) {
         <>
           <CommentCreate uri={uri} justCommented={justCommented} />
 
-          {!isFetchingComments && hasNoComments && (
+          {!commentsDisabledBySettings && !isFetchingComments && hasNoComments && (
             <Empty padded text={__('That was pretty deep. What do you think?')} />
           )}
 

ui/page/settingsCreator/view.jsx

@@ -149,18 +149,18 @@ export default function SettingsCreatorPage(props: Props) {
       )}
       {!isBusy && !isDisabled && (
         <>
-          {FEATURE_IS_READY && (
-            <Card
-              title={__('General')}
-              actions={
-                <>
-                  <FormField
-                    type="checkbox"
-                    name="comments_enabled"
-                    label={__('Enable comments for channel.')}
-                    checked={commentsEnabled}
-                    onChange={() => setSettings({ comments_enabled: !commentsEnabled })}
-                  />
+          <Card
+            title={__('General')}
+            actions={
+              <>
+                <FormField
+                  type="checkbox"
+                  name="comments_enabled"
+                  label={__('Enable comments for channel.')}
+                  checked={commentsEnabled}
+                  onChange={() => setSettings({ comments_enabled: !commentsEnabled })}
+                />
+                {FEATURE_IS_READY && (
                   <FormField
                     name="slow_mode_min_gap"
                     label={__('Minimum time gap in seconds for Slow Mode in livestream chat.')}
@@ -171,10 +171,10 @@ export default function SettingsCreatorPage(props: Props) {
                     value={slowModeMinGap}
                     onChange={(e) => setSettings({ slow_mode_min_gap: e.target.value })}
                   />
-                </>
-              }
-            />
-          )}
+                )}
+              </>
+            }
+          />
           <Card
             title={__('Filter')}
             actions={

ui/redux/actions/comments.js

@@ -34,10 +34,15 @@ export function doCommentList(uri: string, page: number = 1, pageSize: number =
       type: ACTIONS.COMMENT_LIST_STARTED,
     });
 
+    // Adding 'channel_id' and 'channel_name' enables "CreatorSettings > commentsEnabled".
+    const authorChannelClaim = claim.value_type === 'channel' ? claim : claim.signing_channel;
+
     return Comments.comment_list({
       page,
       claim_id: claimId,
       page_size: pageSize,
+      channel_id: authorChannelClaim ? authorChannelClaim.claim_id : undefined,
+      channel_name: authorChannelClaim ? authorChannelClaim.name : undefined,
     })
       .then((result: CommentListResponse) => {
         const { items: comments } = result;
@@ -46,16 +51,27 @@ export function doCommentList(uri: string, page: number = 1, pageSize: number =
           data: {
             comments,
             claimId: claimId,
+            authorClaimId: authorChannelClaim ? authorChannelClaim.claim_id : undefined,
             uri: uri,
           },
         });
         return result;
       })
       .catch((error) => {
-        dispatch({
-          type: ACTIONS.COMMENT_LIST_FAILED,
-          data: error,
-        });
+        if (error.message === 'comments are disabled by the creator') {
+          dispatch({
+            type: ACTIONS.COMMENT_LIST_COMPLETED,
+            data: {
+              authorClaimId: authorChannelClaim ? authorChannelClaim.claim_id : undefined,
+              disabled: true,
+            },
+          });
+        } else {
+          dispatch({
+            type: ACTIONS.COMMENT_LIST_FAILED,
+            data: error,
+          });
+        }
       });
   };
 }

ui/redux/reducers/comments.js

@@ -24,6 +24,7 @@ const defaultState: CommentsState = {
   fetchingModerationBlockList: false,
   blockingByUri: {},
   unBlockingByUri: {},
+  commentsDisabledChannelIds: [],
   settingsByChannelId: {}, // ChannelId -> PerChannelSettings
   fetchingSettings: false,
   fetchingBlockedWords: false,
@@ -167,7 +168,25 @@ export default handleActions(
     [ACTIONS.COMMENT_LIST_STARTED]: (state) => ({ ...state, isLoading: true }),
 
     [ACTIONS.COMMENT_LIST_COMPLETED]: (state: CommentsState, action: any) => {
-      const { comments, claimId, uri } = action.data;
+      const { comments, claimId, uri, disabled, authorClaimId } = action.data;
+      const commentsDisabledChannelIds = [...state.commentsDisabledChannelIds];
+
+      if (disabled) {
+        if (!commentsDisabledChannelIds.includes(authorClaimId)) {
+          commentsDisabledChannelIds.push(authorClaimId);
+        }
+
+        return {
+          ...state,
+          commentsDisabledChannelIds,
+          isLoading: false,
+        };
+      } else {
+        const index = commentsDisabledChannelIds.indexOf(authorClaimId);
+        if (index > -1) {
+          commentsDisabledChannelIds.splice(index, 1);
+        }
+      }
 
       const commentById = Object.assign({}, state.commentById);
       const byId = Object.assign({}, state.byId);
@@ -213,6 +232,7 @@ export default handleActions(
         byId,
         commentById,
         commentsByUri,
+        commentsDisabledChannelIds,
         isLoading: false,
       };
     },

ui/redux/selectors/comments.js

@@ -3,7 +3,7 @@ import { createSelector } from 'reselect';
 import { selectMutedChannels } from 'redux/selectors/blocked';
 import { selectShowMatureContent } from 'redux/selectors/settings';
 import { selectBlacklistedOutpointMap, selectFilteredOutpointMap } from 'lbryinc';
-import { selectClaimsById, isClaimNsfw, selectMyActiveClaims } from 'lbry-redux';
+import { selectClaimsById, isClaimNsfw, selectMyActiveClaims, makeSelectClaimForUri } from 'lbry-redux';
 
 const selectState = (state) => state.comments || {};
 
@@ -11,6 +11,10 @@ export const selectCommentsById = createSelector(selectState, (state) => state.c
 export const selectIsFetchingComments = createSelector(selectState, (state) => state.isLoading);
 export const selectIsPostingComment = createSelector(selectState, (state) => state.isCommenting);
 export const selectIsFetchingReacts = createSelector(selectState, (state) => state.isFetchingReacts);
+export const selectCommentsDisabledChannelIds = createSelector(
+  selectState,
+  (state) => state.commentsDisabledChannelIds
+);
 export const selectOthersReactsById = createSelector(selectState, (state) => state.othersReactsByCommentId);
 export const selectModerationBlockList = createSelector(selectState, (state) =>
   state.moderationBlockList ? state.moderationBlockList.reverse() : []
@@ -330,3 +334,15 @@ export const makeSelectSuperChatTotalAmountForUri = (uri: string) =>
 
     return superChatData.totalAmount;
   });
+
+export const makeSelectCommentsDisabledForUri = (uri: string) =>
+  createSelector(selectCommentsDisabledChannelIds, makeSelectClaimForUri(uri), (commentsDisabledChannelIds, claim) => {
+    const channelClaim = !claim
+      ? null
+      : claim.value_type === 'channel'
+      ? claim
+      : claim.signing_channel && claim.is_channel_signature_valid
+      ? claim.signing_channel
+      : null;
+    return channelClaim && channelClaim.claim_id && commentsDisabledChannelIds.includes(channelClaim.claim_id);
+  });