From 93dfe2be64e8658839bcfe5356adf35f8cde7075 Mon Sep 17 00:00:00 2001
From: Nicolas James <Eele1Ephe7uZahRie@tutanota.com>
Date: Thu, 13 Feb 2025 18:04:18 +1100
Subject: initial commit

---
 src/web/components/posts/Posts.jsx | 163 +++++++++++++++++++++++++++++++++++++
 1 file changed, 163 insertions(+)
 create mode 100644 src/web/components/posts/Posts.jsx

(limited to 'src/web/components/posts/Posts.jsx')

diff --git a/src/web/components/posts/Posts.jsx b/src/web/components/posts/Posts.jsx
new file mode 100644
index 0000000..3944f67
--- /dev/null
+++ b/src/web/components/posts/Posts.jsx
@@ -0,0 +1,163 @@
+import React, {useState, useEffect, useRef} from "react";
+import {Route, Routes, useLocation, useNavigate} from "react-router-dom";
+
+
+import Button from "components/button/Button.jsx";
+import Submission from "components/submission/Submission.jsx";
+import Post from "components/post/Post.jsx";
+import {getSubreactFromLocation} from "helpers/Location.jsx";
+
+import styles from "./Posts.css";
+
+async function makePostsRequest(location, setPosts, setError, mounted) {
+    const init = {
+        method: "GET",
+        referrer: "same-origin",
+    }
+    const url = "/api/posts?" + new URLSearchParams({
+        page: 0,
+        amount: 25,
+        subreact: getSubreactFromLocation(location),
+    });
+    return fetch(url, init)
+        .then((response) => {
+            return response.json()
+                .catch(() => {
+                    throw new Error("unexpected response from server")
+                })
+        })
+        .then((json) => {
+            if ("error" in json) {
+                throw new Error(json.error);
+            }
+            if (!mounted) {
+                return;
+            }
+            setPosts(json.posts);
+        })
+        .catch((error) => {
+            console.log(error);
+            if (!mounted) {
+                return;
+            }
+            setError(error.message); 
+        });
+}
+
+function PostsError({navigate, error}) {
+    return (
+        <div className={styles.container + " " + styles.containerFade}>
+            <h1>Something's wrong!</h1>
+            <h2>Sorry, but an unexpected issue has forced us to stop early. Here are the technical details:</h2>
+            <h3>Error: {error}</h3>
+            <Button onClick={() => {navigate(0);}}>
+                Try again
+            </Button>
+        </div>
+    );
+}
+
+function PostsLoading() {
+    return (
+        <div className={styles.container + " " + styles.containerLoading}>
+            {[...Array(3)].map((_, i) =>
+                <Post placeholder key={i} />
+            )}
+        </div>
+    );
+}
+
+function PostsEmpty({navigate}) {
+    return (
+        <div className={styles.container + " " + styles.containerFade}>
+            <h1>There's nothing here?!?</h1>
+            <h2>Try changing subreacts.</h2>
+            <Button onClick={() => {navigate("/");}}>
+                Take me home
+            </Button>
+        </div>
+    );
+}
+
+function PostsStates({error, posts, navigate}) {
+    if (error !== null) { // Error message.
+        return (
+            <PostsError navigate={navigate} error={error} />
+        );
+    }
+
+    if (posts == null) {
+        return (
+            <PostsLoading />
+        )
+    }
+
+
+    if (posts.length == 0) {
+        return (
+            <PostsEmpty navigate={navigate} />
+        );
+    }
+
+    return (
+        posts.map(({uid, title, contents, time_updated, thumbnail, subreact}, i) => 
+            <Post key={i}
+                    uid={uid} 
+                    title={title}
+                    contents={contents}
+                    timeUpdated={time_updated}
+                    image={thumbnail}
+                    subreact={subreact} />)
+    );
+}
+
+export default function Posts() {
+    const navigate = useNavigate();
+    const location = useLocation();
+    const locationRef = useRef(location);
+
+    const [posts, setPosts] = useState(null);
+    const [error, setError] = useState(null);
+    const [submissionActive, setSubmissionActive] = useState(false);
+
+
+    // We make a request if we're at the homepage or if we're changing subreacts.
+    const shouldMakeRequest = () => {
+        if (posts === null) {
+            return true;
+        }
+        const [previous, current] = 
+            [locationRef.current, location].map((loc) => getSubreactFromLocation(loc));
+        return previous != current;
+    };
+    // This is a bit ugly, we're caching off our previous location so that we know
+    // if we should update or not. 
+    useEffect(() => {
+        let mounted = true;
+
+        if (shouldMakeRequest()) {
+            setPosts(null);
+            makePostsRequest(location, setPosts, setError, mounted);
+        }
+
+        locationRef.current = location;
+        return () => {
+            setError(null);
+            mounted = false;
+        }
+    }, [location]);
+
+    return (
+        <div className={styles.container}>
+            <div className={styles.containerPadding}>
+                <div className={styles.postContainer + (submissionActive ? " " + styles.postContainerActive : "")}
+                    onClick={(submissionActive ? () => {setSubmissionActive(false);} : null)}>
+                        <div className={(submissionActive ? styles.blockEvents : "")}>
+                            <PostsStates error={error} posts={posts} navigate={navigate}/>
+                        </div>
+                </div>
+            </div>
+            <Submission active={submissionActive} setActive={setSubmissionActive} />
+        </div>
+    );
+}
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