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Only refetch when navigating from media content #179

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21 changes: 17 additions & 4 deletions components/courses/student/StudentCourseLayout.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@ import ExitToAppIcon from "@mui/icons-material/ExitToApp";
import { Box, Button, Typography } from "@mui/material";
import { useParams, usePathname, useRouter } from "next/navigation";
import * as React from "react";
import { useEffect, useState } from "react";
import { useEffect, useRef, useState } from "react";
import { graphql, useLazyLoadQuery, useMutation } from "react-relay";

const studentCourseIdQuery = graphql`
Expand Down Expand Up @@ -138,12 +138,25 @@ export default function CourseLayout({
// This simple refresh ensures updated data (e.g. course progress).
// The clean solution would be to move data fetching into the subpages,
// so data refetches automatically when those components are mounted.
const prevPathname = useRef(pathname);

useEffect(() => {
const chaptersPageRegex = /^\/courses\/[^\/]+(\/chapters)?$/;
const coursePageRegex = /^\/courses\/[^\/]+$/;
if (coursePageRegex.test(pathname) || chaptersPageRegex.test(pathname)) {
const subPages = [
/^\/courses\/[^\/]+\/forum$/,
/^\/courses\/[^\/]+\/progress$/,
/^\/courses\/[^\/]+\/quests$/,
/^\/courses\/[^\/]+\/leaderboard$/,
/^\/courses\/[^\/]+\/chapters$/,
/^\/courses\/[^\/]+$/,
];

const wasSubPage = subPages.some((regex) => regex.test(prevPathname.current));

if ((!wasSubPage && (pathname.match(/^\/courses\/[^\/]+$/)) || (!wasSubPage && (pathname.match(/^\/courses\/[^\/]+\/chapters$/))))) {
setRefreshKey((prev) => prev + 1);
}

prevPathname.current = pathname;
}, [pathname]);

const [leave] = useMutation<StudentCourseLayoutLeaveMutation>(graphql`
Expand Down
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