Restructure codebase to use src directory

src/components/BeerById/BeerPostCommentsSection.tsx

@@ -0,0 +1,140 @@
+/* eslint-disable no-nested-ternary */
+import UserContext from '@/contexts/userContext';
+
+import beerPostQueryResult from '@/services/BeerPost/schema/BeerPostQueryResult';
+
+import { FC, MutableRefObject, useContext, useRef } from 'react';
+import { z } from 'zod';
+import useBeerPostComments from '@/hooks/useBeerPostComments';
+import { useRouter } from 'next/router';
+import { useInView } from 'react-intersection-observer';
+import { FaArrowUp } from 'react-icons/fa';
+import BeerCommentForm from './BeerCommentForm';
+
+import CommentCardBody from './CommentCardBody';
+import NoCommentsCard from './NoCommentsCard';
+import LoadingComponent from './LoadingComponent';
+
+interface BeerPostCommentsSectionProps {
+  beerPost: z.infer<typeof beerPostQueryResult>;
+}
+
+const BeerPostCommentsSection: FC<BeerPostCommentsSectionProps> = ({ beerPost }) => {
+  const { user } = useContext(UserContext);
+  const router = useRouter();
+  const { id } = beerPost;
+  const pageNum = parseInt(router.query.comments_page as string, 10) || 1;
+  const PAGE_SIZE = 4;
+
+  const { comments, isLoading, mutate, setSize, size, isLoadingMore, isAtEnd } =
+    useBeerPostComments({
+      id,
+      pageNum,
+      pageSize: PAGE_SIZE,
+    });
+
+  const { ref: lastCommentRef } = useInView({
+    /**
+     * When the last comment comes into view, call setSize from useBeerPostComments to
+     * load more comments.
+     */
+    onChange: (visible) => {
+      if (!visible || isAtEnd) return;
+      setSize(size + 1);
+    },
+  });
+
+  const sectionRef: MutableRefObject<HTMLDivElement | null> = useRef(null);
+  return (
+    <div className="w-full space-y-3">
+      <div className="card h-96 bg-base-300">
+        <div className="card-body h-full" ref={sectionRef}>
+          {user ? (
+            <BeerCommentForm beerPost={beerPost} mutate={mutate} />
+          ) : (
+            <div className="flex h-full flex-col items-center justify-center">
+              <span className="text-lg font-bold">Log in to leave a comment.</span>
+            </div>
+          )}
+        </div>
+      </div>
+
+      {
+        /**
+         * If the comments are loading, show a loading component. Otherwise, show the
+         * comments.
+         */
+        isLoading ? (
+          <div className="card bg-base-300 pb-6">
+            <LoadingComponent length={PAGE_SIZE} />
+          </div>
+        ) : (
+          <>
+            {!!comments.length && (
+              <div className="card bg-base-300 pb-6">
+                {comments.map((comment, index) => {
+                  const isLastComment = index === comments.length - 1;
+
+                  /**
+                   * Attach a ref to the last comment in the list. When it comes into
+                   * view, the component will call setSize to load more comments.
+                   */
+                  return (
+                    <div
+                      ref={isLastComment ? lastCommentRef : undefined}
+                      key={comment.id}
+                    >
+                      <CommentCardBody comment={comment} mutate={mutate} />
+                    </div>
+                  );
+                })}
+
+                {
+                  /**
+                   * If there are more comments to load, show a loading component with a
+                   * skeleton loader and a loading spinner.
+                   */
+                  !!isLoadingMore && (
+                    <LoadingComponent length={Math.floor(PAGE_SIZE / 2)} />
+                  )
+                }
+
+                {
+                  /**
+                   * If the user has scrolled to the end of the comments, show a button
+                   * that will scroll them back to the top of the comments section.
+                   */
+                  !!isAtEnd && (
+                    <div className="flex h-20 items-center justify-center text-center">
+                      <div
+                        className="tooltip tooltip-bottom"
+                        data-tip="Scroll back to top of comments."
+                      >
+                        <button
+                          type="button"
+                          className="btn-ghost btn-sm btn"
+                          aria-label="Scroll back to top of comments"
+                          onClick={() => {
+                            sectionRef.current?.scrollIntoView({
+                              behavior: 'smooth',
+                            });
+                          }}
+                        >
+                          <FaArrowUp />
+                        </button>
+                      </div>
+                    </div>
+                  )
+                }
+              </div>
+            )}
+
+            {!comments.length && <NoCommentsCard />}
+          </>
+        )
+      }
+    </div>
+  );
+};
+
+export default BeerPostCommentsSection;