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import moment from 'moment';
import React, {useContext, useEffect, useRef, useState} from 'react';
import {StyleSheet} from 'react-native';
import {FlatList} from 'react-native-gesture-handler';
import {useDispatch, useSelector} from 'react-redux';
import {CommentContext} from '../../screens/profile/MomentCommentsScreen';
import {getComments} from '../../services';
import {updateReplyPosted} from '../../store/actions';
import {RootState} from '../../store/rootReducer';
import {CommentThreadType, CommentType, ScreenType} from '../../types';
import {SCREEN_HEIGHT} from '../../utils';
import CommentTile from './CommentTile';
export type CommentsContainerProps = {
screenType: ScreenType;
objectId: string;
commentId?: string;
shouldUpdate: boolean;
setShouldUpdate: (update: boolean) => void;
isThread: boolean;
setCommentsLengthParent: (length: number) => void;
};
/**
* Comments Container to be used for both comments and replies
*/
const CommentsContainer: React.FC<CommentsContainerProps> = ({
screenType,
objectId,
isThread,
shouldUpdate,
setShouldUpdate,
commentId,
setCommentsLengthParent,
}) => {
const {setCommentsLength, commentTapped} = useContext(CommentContext);
const {username: loggedInUsername} = useSelector(
(state: RootState) => state.user.user,
);
const [commentsList, setCommentsList] = useState<CommentType[]>([]);
const dispatch = useDispatch();
const ref = useRef<FlatList<CommentType>>(null);
const ITEM_HEIGHT = SCREEN_HEIGHT / 7.0;
const countComments = (comments: CommentType[]) => {
let count = 0;
for (let i = 0; i < comments.length; i++) {
count += 1 + comments[i].replies_count;
}
return count;
}
useEffect(() => {
const loadComments = async () => {
await getComments(objectId, isThread).then((comments) => {
if (comments && subscribedToLoadComments) {
setCommentsList(comments);
if (setCommentsLength) {
setCommentsLength(comments.length);
}
setShouldUpdate(false);
}
setCommentsLengthParent(countComments(comments));
});
};
let subscribedToLoadComments = true;
if (shouldUpdate) {
loadComments();
}
return () => {
subscribedToLoadComments = false;
};
}, [shouldUpdate]);
// scrolls to the comment
useEffect(() => {
if (commentId) {
const index = commentsList.findIndex(
(item) => item.comment_id === commentId,
);
if (index > 0) {
let comments = [...commentsList];
const temp = comments[index];
comments[index] = comments[0];
comments[0] = temp;
setCommentsList(comments);
}
} else if (!isThread && !commentTapped) {
setTimeout(() => {
ref.current?.scrollToEnd({animated: true});
}, 500);
}
return () => {
if (commentId && isThread) {
setTimeout(() => {
dispatch(updateReplyPosted(undefined));
}, 200);
}
};
}, [commentId]);
const renderComment = ({item}: {item: CommentType | CommentThreadType}) => (
<CommentTile
key={item.comment_id}
commentObject={item}
screenType={screenType}
isThread={isThread}
shouldUpdateParent={shouldUpdate}
setShouldUpdateParent={setShouldUpdate}
canDelete={item.commenter.username === loggedInUsername}
/>
);
return (
<FlatList
data={commentsList.sort(
(a, b) => moment(a.date_created).unix() - moment(b.date_created).unix(),
)}
ref={ref}
keyExtractor={(item, index) => index.toString()}
decelerationRate={'fast'}
snapToAlignment={'start'}
snapToInterval={ITEM_HEIGHT}
renderItem={renderComment}
showsVerticalScrollIndicator={false}
contentContainerStyle={styles.scrollViewContent}
getItemLayout={(data, index) => ({
length: ITEM_HEIGHT,
offset: ITEM_HEIGHT * index,
index,
})}
pagingEnabled
/>
);
};
const styles = StyleSheet.create({
scrollView: {},
scrollViewContent: {
justifyContent: 'center',
},
});
export default CommentsContainer;
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