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Mixer/assets/js/index.tsx

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import React, { createContext, useContext, useState, useRef, useEffect } from "react";
import { createRoot } from "react-dom/client";
import {
QueryClient,
QueryClientProvider,
useQuery,
useMutation,
useQueryClient,
} from "@tanstack/react-query";
import {
createTweet,
readTweet,
destroyTweet,
updateTweet,
buildCSRFHeaders,
} from "./ash_rpc";
import { uploadFile } from "./upload";
const queryClient = new QueryClient({
defaultOptions: { queries: { staleTime: 10_000 } },
});
// ── Types ──────────────────────────────────────────────────────────────────────
type MediaItem = { id: string; s3Key: string };
type Tweet = { id: string; content: string; userId: string; state: string; media?: MediaItem[] };
// ── Auth context ───────────────────────────────────────────────────────────────
const AuthCtx = createContext({ email: "", userId: "" });
// ── Helpers ────────────────────────────────────────────────────────────────────
function timeAgo(): string {
return "just now";
}
function getAssetHost(): string {
const appEl = document.getElementById("app");
return appEl?.dataset.assetHost ?? "http://localhost:3901";
}
// ── Components ─────────────────────────────────────────────────────────────────
function Spinner() {
return (
<div style={{ display: "flex", justifyContent: "center", padding: "2rem" }}>
<div className="mx-spinner" />
</div>
);
}
function ErrorBanner({ message }: { message: string }) {
return (
<div className="mx-error-banner">
<span className="mx-error-icon"></span>
{message}
</div>
);
}
function CharCount({ current, max }: { current: number; max: number }) {
const remaining = max - current;
const pct = current / max;
const color =
pct > 0.9 ? "#ef4444" : pct > 0.75 ? "#f59e0b" : "var(--mx-muted)";
return (
<span style={{ color, fontSize: "0.75rem", fontVariantNumeric: "tabular-nums" }}>
{remaining}
</span>
);
}
function ComposeTweet({ onSuccess }: { onSuccess?: () => void }) {
const [text, setText] = useState("");
const [error, setError] = useState<string | null>(null);
const [pendingFile, setPendingFile] = useState<File | null>(null);
const [previewUrl, setPreviewUrl] = useState<string | null>(null);
const [mediaId, setMediaId] = useState<string | null>(null);
const [uploading, setUploading] = useState(false);
const [uploadError, setUploadError] = useState<string | null>(null);
const textareaRef = useRef<HTMLTextAreaElement>(null);
const fileInputRef = useRef<HTMLInputElement>(null);
const qc = useQueryClient();
const MAX = 280;
const mutation = useMutation({
mutationFn: async (content: string) => {
const res = await createTweet({
input: { content, mediaId: mediaId ?? undefined },
fields: ["id", "content", "userId", "state"],
headers: buildCSRFHeaders(),
});
if (!res.success) throw new Error(res.errors?.[0]?.message ?? "Failed");
return res.data;
},
onSuccess: () => {
qc.invalidateQueries({ queryKey: ["tweets"] });
setText("");
setError(null);
setMediaId(null);
setPendingFile(null);
setUploadError(null);
if (previewUrl) {
URL.revokeObjectURL(previewUrl);
setPreviewUrl(null);
}
onSuccess?.();
},
onError: (e: Error) => setError(e.message),
});
async function handleFileChange(e: React.ChangeEvent<HTMLInputElement>) {
const file = e.target.files?.[0];
if (!file) return;
// Reset the input so the same file can be re-selected after removal
e.target.value = "";
// Revoke any previous object URL to avoid memory leaks
if (previewUrl) URL.revokeObjectURL(previewUrl);
const localUrl = URL.createObjectURL(file);
setPendingFile(file);
setPreviewUrl(localUrl);
setMediaId(null);
setUploadError(null);
setUploading(true);
const csrfToken = buildCSRFHeaders()["X-CSRF-Token"] as string;
const result = await uploadFile(file, csrfToken);
setUploading(false);
if ("error" in result) {
setUploadError(result.error);
setPendingFile(null);
URL.revokeObjectURL(localUrl);
setPreviewUrl(null);
} else {
setMediaId(result.mediaId);
}
}
function removeAttachment() {
if (previewUrl) URL.revokeObjectURL(previewUrl);
setPendingFile(null);
setPreviewUrl(null);
setMediaId(null);
setUploadError(null);
}
function handleKeyDown(e: React.KeyboardEvent<HTMLTextAreaElement>) {
if ((e.metaKey || e.ctrlKey) && e.key === "Enter") {
e.preventDefault();
submit();
}
}
function submit() {
const trimmed = text.trim();
if (!trimmed) return;
if (trimmed.length > MAX) {
setError(`Max ${MAX} characters`);
return;
}
setError(null);
mutation.mutate(trimmed);
}
// Auto-resize textarea
useEffect(() => {
const el = textareaRef.current;
if (!el) return;
el.style.height = "auto";
el.style.height = `${el.scrollHeight}px`;
}, [text]);
return (
<div className="mx-compose">
<div className="mx-compose-avatar">
<span>M</span>
</div>
<div className="mx-compose-body">
<textarea
ref={textareaRef}
className="mx-compose-textarea"
placeholder="What's mixing?"
value={text}
onChange={(e) => setText(e.target.value)}
onKeyDown={handleKeyDown}
rows={2}
maxLength={MAX + 1}
/>
{previewUrl && pendingFile && (
<div style={{ position: "relative", marginTop: "0.5rem", display: "inline-block" }}>
{/\.(mp4|mov)$/i.test(pendingFile.name) ? (
<video
src={previewUrl}
controls
style={{ maxWidth: "100%", maxHeight: "200px", borderRadius: "0.5rem", display: "block" }}
/>
) : (
<img
src={previewUrl}
alt="attachment preview"
style={{ maxWidth: "100%", maxHeight: "200px", borderRadius: "0.5rem", display: "block" }}
/>
)}
{uploading && (
<div style={{
position: "absolute", inset: 0, background: "rgba(0,0,0,0.4)",
borderRadius: "0.5rem", display: "flex", alignItems: "center", justifyContent: "center",
color: "#fff", fontSize: "0.75rem"
}}>
Uploading
</div>
)}
<button
type="button"
onClick={removeAttachment}
style={{
position: "absolute", top: "4px", right: "4px",
background: "rgba(0,0,0,0.6)", border: "none", borderRadius: "50%",
width: "20px", height: "20px", cursor: "pointer",
color: "#fff", fontSize: "12px", lineHeight: 1,
display: "flex", alignItems: "center", justifyContent: "center"
}}
title="Remove attachment"
>
×
</button>
</div>
)}
{uploadError && <p className="mx-compose-error">{uploadError}</p>}
{error && <p className="mx-compose-error">{error}</p>}
<div className="mx-compose-footer">
<div style={{ display: "flex", alignItems: "center", gap: "0.5rem" }}>
<button
type="button"
className="mx-action-btn"
title="Attach image or video"
onClick={() => fileInputRef.current?.click()}
disabled={uploading || mutation.isPending}
>
<svg width="16" height="16" viewBox="0 0 24 24" fill="currentColor">
<path d="M21 19V5c0-1.1-.9-2-2-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2zM8.5 13.5l2.5 3.01L14.5 12l4.5 6H5l3.5-4.5z" />
</svg>
</button>
<input
ref={fileInputRef}
type="file"
accept="image/*,video/mp4,video/quicktime"
style={{ display: "none" }}
onChange={handleFileChange}
/>
{uploading && (
<span style={{ fontSize: "0.75rem", color: "var(--mx-muted)" }}>
{pendingFile?.name}
</span>
)}
</div>
<div className="mx-compose-actions">
<CharCount current={text.length} max={MAX} />
<button
className="mx-btn-post"
onClick={submit}
disabled={!text.trim() || mutation.isPending || uploading}
>
{mutation.isPending ? "Posting…" : "Post"}
</button>
</div>
</div>
</div>
</div>
);
}
function TweetMedia({ media }: { media: MediaItem[] }) {
const assetHost = getAssetHost();
return (
<div style={{ marginTop: "0.5rem", display: "flex", flexDirection: "column", gap: "0.5rem" }}>
{media.map((m) =>
/\.(mp4|mov)$/i.test(m.s3Key) ? (
<video
key={m.id}
src={`${assetHost}/${m.s3Key}`}
controls
style={{ maxWidth: "100%", borderRadius: "0.5rem" }}
/>
) : (
<img
key={m.id}
src={`${assetHost}/${m.s3Key}`}
alt=""
style={{ maxWidth: "100%", borderRadius: "0.5rem", display: "block" }}
/>
)
)}
</div>
);
}
function TweetCard({ tweet }: { tweet: Tweet }) {
const { userId: currentUserId } = useContext(AuthCtx);
const canModify = !!currentUserId && tweet.userId === currentUserId;
const [editing, setEditing] = useState(false);
const [editText, setEditText] = useState(tweet.content);
const [error, setError] = useState<string | null>(null);
const [confirmDelete, setConfirmDelete] = useState(false);
const qc = useQueryClient();
const deleteMutation = useMutation({
mutationFn: async () => {
const res = await destroyTweet({
identity: tweet.id,
headers: buildCSRFHeaders(),
});
if (!res.success) throw new Error(res.errors?.[0]?.message ?? "Failed to delete");
},
onSuccess: () => qc.invalidateQueries({ queryKey: ["tweets"] }),
onError: (e: Error) => setError(e.message),
});
const updateMutation = useMutation({
mutationFn: async (content: string) => {
const res = await updateTweet({
identity: tweet.id,
input: { content },
fields: ["id", "content", "userId", "state"],
headers: buildCSRFHeaders(),
});
if (!res.success) throw new Error(res.errors?.[0]?.message ?? "Failed to update");
},
onSuccess: () => {
qc.invalidateQueries({ queryKey: ["tweets"] });
setEditing(false);
setError(null);
},
onError: (e: Error) => setError(e.message),
});
function saveEdit() {
const trimmed = editText.trim();
if (!trimmed) return;
updateMutation.mutate(trimmed);
}
return (
<article className="mx-tweet">
<div className="mx-tweet-avatar">
<span>M</span>
</div>
<div className="mx-tweet-body">
<div className="mx-tweet-header">
<span className="mx-tweet-handle">@mixer</span>
<span className="mx-tweet-dot">·</span>
<span className="mx-tweet-time">{timeAgo()}</span>
{canModify && (
<div className="mx-tweet-actions">
<button
className="mx-action-btn"
title="Edit"
onClick={() => {
setEditText(tweet.content);
setEditing(true);
setConfirmDelete(false);
}}
>
<svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor">
<path d="M3 17.25V21h3.75L17.81 9.94l-3.75-3.75L3 17.25zm17.71-10.04a1 1 0 0 0 0-1.41l-2.31-2.31a1 1 0 0 0-1.41 0l-1.79 1.79 3.75 3.75 1.76-1.82z" />
</svg>
</button>
<button
className={`mx-action-btn mx-action-delete${confirmDelete ? " mx-action-confirm" : ""}`}
title={confirmDelete ? "Confirm delete" : "Delete"}
onClick={() => {
if (!confirmDelete) {
setConfirmDelete(true);
setTimeout(() => setConfirmDelete(false), 3000);
} else {
deleteMutation.mutate();
}
}}
>
{deleteMutation.isPending ? (
<span style={{ fontSize: "0.65rem" }}></span>
) : confirmDelete ? (
<svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor">
<path d="M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41L9 16.17z" />
</svg>
) : (
<svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor">
<path d="M6 19c0 1.1.9 2 2 2h8c1.1 0 2-.9 2-2V7H6v12zM19 4h-3.5l-1-1h-5l-1 1H5v2h14V4z" />
</svg>
)}
</button>
</div>
)}
</div>
{editing ? (
<div className="mx-edit-area">
<textarea
className="mx-edit-textarea"
value={editText}
onChange={(e) => setEditText(e.target.value)}
autoFocus
rows={3}
/>
{error && <p className="mx-compose-error">{error}</p>}
<div className="mx-edit-footer">
<button
className="mx-btn-cancel"
onClick={() => {
setEditing(false);
setError(null);
}}
>
Cancel
</button>
<button
className="mx-btn-save"
onClick={saveEdit}
disabled={!editText.trim() || updateMutation.isPending}
>
{updateMutation.isPending ? "Saving…" : "Save"}
</button>
</div>
</div>
) : (
<p className="mx-tweet-text">{tweet.content}</p>
)}
{tweet.media && tweet.media.length > 0 && (
<TweetMedia media={tweet.media} />
)}
{error && !editing && <p className="mx-compose-error">{error}</p>}
</div>
</article>
);
}
function Feed() {
const { data, isLoading, isError, error, refetch } = useQuery({
queryKey: ["tweets"],
queryFn: async () => {
const res = await readTweet({
fields: ["id", "content", "userId", "state", { media: ["id", "s3Key"] }],
sort: "-id",
headers: buildCSRFHeaders(),
});
if (!res.success) throw new Error("Failed to load tweets");
const tweets = Array.isArray(res.data) ? res.data : (res.data as any)?.results ?? [];
return tweets as Tweet[];
},
});
if (isLoading) return <Spinner />;
if (isError) {
return (
<ErrorBanner message={(error as Error)?.message ?? "Could not load tweets"} />
);
}
const tweets = data ?? [];
if (tweets.length === 0) {
return (
<div className="mx-empty">
<div className="mx-empty-icon"></div>
<p className="mx-empty-title">Nothing posted yet</p>
<p className="mx-empty-sub">Be the first to mix something in.</p>
</div>
);
}
return (
<div className="mx-feed">
{tweets.map((t) => (
<TweetCard key={t.id} tweet={t} />
))}
</div>
);
}
function RefreshButton() {
const qc = useQueryClient();
const [spinning, setSpinning] = useState(false);
async function refresh() {
setSpinning(true);
await qc.invalidateQueries({ queryKey: ["tweets"] });
setTimeout(() => setSpinning(false), 600);
}
return (
<button className="mx-refresh-btn" onClick={refresh} title="Refresh feed">
<svg
width="15"
height="15"
viewBox="0 0 24 24"
fill="currentColor"
style={{
transition: "transform 0.6s ease",
transform: spinning ? "rotate(360deg)" : "rotate(0deg)",
}}
>
<path d="M17.65 6.35A7.958 7.958 0 0 0 12 4c-4.42 0-7.99 3.58-7.99 8s3.57 8 7.99 8c3.73 0 6.84-2.55 7.73-6h-2.08A5.99 5.99 0 0 1 12 18c-3.31 0-6-2.69-6-6s2.69-6 6-6c1.66 0 3.14.69 4.22 1.78L13 11h7V4l-2.35 2.35z" />
</svg>
</button>
);
}
function App() {
const appEl = document.getElementById("app")!;
const email = appEl.dataset.currentUserEmail ?? "";
const userId = appEl.dataset.currentUserId ?? "";
return (
<AuthCtx.Provider value={{ email, userId }}>
<QueryClientProvider client={queryClient}>
<div className="mx-root">
<aside className="mx-sidebar">
<div className="mx-logo">
<span className="mx-logo-icon"></span>
<span className="mx-logo-text">Mixer</span>
</div>
<nav className="mx-nav">
<a className="mx-nav-item mx-nav-active" href="#">
<svg width="18" height="18" viewBox="0 0 24 24" fill="currentColor">
<path d="M10 20v-6h4v6h5v-8h3L12 3 2 12h3v8z" />
</svg>
Feed
</a>
</nav>
<div className="mx-sidebar-footer">
{email ? (
<>
<span className="mx-version" style={{ color: "var(--mx-fg2)" }}>{email}</span>
<a className="mx-auth-link" href="/auth/sign-out">Sign out</a>
</>
) : (
<>
<a className="mx-auth-link" href="/register">Create account</a>
<a className="mx-auth-link" href="/auth/sign-in">Sign in</a>
</>
)}
<span className="mx-version">v0.1.0</span>
</div>
</aside>
<main className="mx-main">
<header className="mx-header">
<h1 className="mx-header-title">Feed</h1>
<RefreshButton />
</header>
<div className="mx-compose-wrapper">
{email ? (
<ComposeTweet />
) : (
<div className="mx-signin-cta">
<p>Sign in to start mixing.</p>
<a className="mx-btn-post" href="/register">Sign in</a>
</div>
)}
</div>
<div className="mx-divider" />
<Feed />
</main>
<div className="mx-rightbar">
<div className="mx-info-card">
<h3 className="mx-info-title">About Mixer</h3>
<p className="mx-info-body">
A minimal social feed built with Ash Framework, Phoenix, and React.
</p>
<div className="mx-stack">
{["Ash 3", "Phoenix 1.8", "AshTypescript", "React 19"].map((s) => (
<span key={s} className="mx-tag">{s}</span>
))}
</div>
</div>
</div>
</div>
</QueryClientProvider>
</AuthCtx.Provider>
);
}
// ── Bootstrap ──────────────────────────────────────────────────────────────────
const root = createRoot(document.getElementById("app")!);
root.render(
<React.StrictMode>
<App />
</React.StrictMode>
);