# All files / atlas-mobile-ts/src/hooks useComments.ts

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     ﻿/* Copyright (C) Click & Push Accessibility, Inc - All Rights Reserved
     * Unauthorized copying of this file, via any medium is strictly prohibited
     * Proprietary and confidential
     * Written and maintained by the Click & Push Development team
     * <dev@clicknpush.ca>, January 2022
     */

    import axios, { AxiosRequestConfig } from "axios";
    import { QueryClient, useMutation, useQuery, useQueryClient } from "react-query";
    import { authStore } from "../libs/auth/AuthStore";
    import { API_URL, reportAxiosError } from "../utils/RequestUtils";
    import { useAuth } from "./useAuth";

    /**
     * Interface representing a landmark's comment.
     */
    export interface LMComment {
        /**
         * The comment's id.
         */
        id: string,
        /**
         * The id of the user who posted the comment
         */
        poster: string,
        /**
         * The username of the user who posted the comment
         */
         poster_name: string,
        /**
         * The text content of the comment
         */
        content: string
        /**
         * The landmark id that this comment is associated with.
         */
        landmark: string
        /**
         * Timestamp of when the comment was posted.
         */
         timestamp?: Date
        /**
         * Whether or not the comment has been edited.
         */
         edited: boolean
    }

    /**
     * A custom hook containing [react-query]{@link https://react-query.tanstack.com/} queries and mutations and other logic related to interacting with {@link comment} objects.
     * @category Hooks
     * @namespace useComments
     * @param landmarkId - The id of the current landmark focused by the user. Used to fetch only the comments relevant to that landmark.
     */
    export const useComments = (landmarkId: string) => {
        const { refreshAccessToken } = useAuth();

        /**
         * The local instance of the [react-query QueryClient]{@link https://react-query.tanstack.com/reference/QueryClient#_top}.
         * @memberOf useComments
         */
        let queryClient: QueryClient;

        try {
            queryClient = useQueryClient()
        } catch (error) {
            console.error("[CommentsData]: Something went wrong when retrieving query client: " + error)
        }

        /**
         * The callback responsible for retrieving [comments]{@link LMComment} from the API, used by the [react-query useQuery]{@link https://react-query.tanstack.com/reference/useQuery#_top} hook.
         * * @memberOf useComments
         */
        const getCommentsForLandmark = async (landmarkId: string) => {
            Iif (landmarkId) {
                const config: AxiosRequestConfig = {
                    method: 'GET',
                    url: `${API_URL}/api/comments/${landmarkId}`,
                    headers: { "Authorization": "Bearer " + authStore.accessToken, }
                }

                try {
                    const response = await axios(config);
                    return response.data.reverse();
                } catch (error) {
                    Iif (error.response.status == 401) {
                        try {
                            await refreshAccessToken()
                            const response = await axios({...config, headers: { "Authorization": "Bearer " + authStore.accessToken }});
                            return response.data.reverse();
                        } catch (error) {
                            // refreshAccessToken will report errors
                        }
                    }

                    reportAxiosError('Something went wrong when retrieving landmarks', error)
                    throw new Error;
                }
            }
        }

         /**
         * The callback responsible for adding a new {@link Landmark} to the server, used by the [react-query useMutation]{@link https://react-query.tanstack.com/reference/useMutation#_top} hook.
         * * @memberOf useLandmarks
         */
        const createComment = async (commentValue: LMComment): Promise<LMComment | undefined> => {
            Iif (commentValue) {
                const config: AxiosRequestConfig = {
                    method: 'POST',
                    data: commentValue,
                    url: API_URL + `/api/comments/`,
                    headers: { "Authorization": "Bearer " + authStore.accessToken, }
                }

                try {
                    const response = await axios(config);
                    return response.data;
                } catch (error) {
                    Iif (error.response.status == 401) {
                        try {
                            await refreshAccessToken()
                            const response = await axios({...config, headers: { "Authorization": "Bearer " + authStore.accessToken }});

                            return response.data;
                        } catch (error) {
                            // refreshAccessToken will report errors
                        }
                    }

                    reportAxiosError('Something went wrong when retrieving landmarks', error)
                    throw new Error;
                }
            }
        }

        /**
         * The callback responsible for updating a {@link Landmark} on the server, used by the [react-query useMutation]{@link https://react-query.tanstack.com/reference/useMutation#_top} hook.
         * * @memberOf useComments
         */
        const editComment =  async (commentValue: LMComment) => {
            Iif (commentValue) {
                const config: AxiosRequestConfig = {
                    method: 'PUT',
                    data: {...commentValue, edited: true},
                    url: API_URL + `/api/comments/`,
                    headers: { "Authorization": "Bearer " + authStore.accessToken, }
                }

                try {
                    const response = await axios(config);
                    return response.data;
                } catch (error) {
                    Iif (error.response.status == 401) {
                        try {
                            await refreshAccessToken()
                            const response = await axios({...config, headers: { "Authorization": "Bearer " + authStore.accessToken }});

                            return response.data;
                        } catch (error) {
                            // refreshAccessToken will report errors
                        }
                    }

                    reportAxiosError('Something went wrong when retrieving landmarks', error)
                    throw new Error;
                }
            }
        }

        /**
         * The callback responsible for deleting a {@link Landmark} from the server, used by the [react-query useMutation]{@link https://react-query.tanstack.com/reference/useMutation#_top} hook.
         * * @memberOf useLandmarks
         */
        const removeComment =  async (id?: string | null) => {
            Iif (id) {
                const config: AxiosRequestConfig = {
                    method: 'DELETE',
                    url: API_URL + `/api/comments/${id}`,
                    headers: { "Authorization": "Bearer " + authStore.accessToken, }
                }
                try {
                    const response = await axios(config);
                    return response.data;
                } catch (error) {
                    Iif (error.response.status == 401) {
                        try {
                            await refreshAccessToken()

                            // add new access token to header
                            const response = await axios({...config, headers: {"Authorization": "Bearer " + authStore.accessToken}});
                            return response.data;
                        } catch (error) {
                            // refreshAccessToken will report errors
                        }
                    }

                    reportAxiosError('Something went wrong when retrieving landmarks', error)
                    throw new Error;
                }
            }
        }

        // get-all query
        const { data: comments, status: getCommentsForLandmarkStatus, refetch: refetechCommentsForLandmark } = useQuery<LMComment[], Error>(['getCommentsForLandmark', landmarkId], async () => getCommentsForLandmark(landmarkId), {
            placeholderData: () => queryClient.getQueryData('getCommentsForLandmark'),
            staleTime: 1000,
            refetchInterval: 30000,
            refetchOnReconnect: true,
            refetchOnMount: false
        })

        // mutations
        const { status: addCommentStatus, mutateAsync: addCommentAsync, reset: resetAddComment, data: newComment } = useMutation(createComment, {
            onSuccess: data => {
                queryClient.invalidateQueries('getCommentsForLandmark')
            },
        })

        const { status: updateCommentStatus, mutateAsync: updateCommentAsync, reset: resetUpdateComment } = useMutation(editComment, {
            onSuccess: () => queryClient.invalidateQueries('getCommentsForLandmark'),
            onError: () => queryClient.invalidateQueries('getCommentsForLandmark'),
        })

        const { status: deleteCommentStatus, mutateAsync: deleteCommentAsync, reset: resetDeleteComment } = useMutation(removeComment, {
            onSuccess: () => queryClient.invalidateQueries('getCommentsForLandmark'),
            onError: () => queryClient.invalidateQueries('getCommentsForLandmark'),
        })

        return {
            comments, getCommentsForLandmarkStatus, refetechCommentsForLandmark,  //reading
            addCommentAsync, resetAddComment, addCommentStatus, newComment, // creating
            updateCommentAsync, resetUpdateComment, updateCommentStatus, // updating
            deleteCommentAsync, resetDeleteComment, deleteCommentStatus, // deleting
        }
    }