527 lines
18 KiB
TypeScript
527 lines
18 KiB
TypeScript
"use client";
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/**
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* SharePostSheet — share a quote you've posted to external apps.
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*
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* Modal on desktop (Drawer direction="right"), drawer on mobile
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* (direction="bottom"). Same UI primitive CollectionsDrawer uses.
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*
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* What we share:
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*
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* "<full caption>"
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*
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* — <reference, e.g. Bhagavad-gītā 2.13>
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*
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* <shortened URL pointing to the POST on your profile feed>
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*
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* The link target is `/u/<handle>/posts#post-<id>` — the Instagram-style
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* scroll view anchored to this specific post — rather than the raw
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* source URL. Recipients land on the card (image, your caption, your
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* byline) and can click through to the original passage from there.
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* This matches how every major social product handles "share a post":
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* the share URL is the post, not the underlying resource.
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*
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* URL is run through createShortLink (same /share/<code> short-code
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* service the selection-toolbar uses) so the payload stays compact and
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* the click-through is trackable. The shortener's ValidatePath tolerates
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* fragments, and the destination pages' existing hash-anchor effect
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* scrolls to the post on mount — no other code needs to know.
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*
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* Sharing channels:
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*
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* • WhatsApp / Telegram / X / Facebook — official web share intents.
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* We open them in a new window; the user finishes in that app.
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* • Instagram — has no web share intent. We copy the payload + toast
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* "paste in Instagram" so the user can switch and paste.
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* • Email — mailto: with prefilled subject + body.
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* • Copy — drops the full payload on the clipboard.
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* • More — only when navigator.share is supported AND we're on mobile.
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* Tries to attach the first image as a File via navigator.canShare;
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* falls back to text-only if R2 CORS blocks the blob fetch.
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*
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* Images travel only via the native-share path. None of the open web
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* share intents accept an image URL directly — they pull OpenGraph
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* metadata from the linked page instead, which we don't currently
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* generate per-post. That's the "bonus" the brief allows for.
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*/
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import { useEffect, useMemo, useState } from "react";
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import { toast } from "sonner";
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import {
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FaWhatsapp,
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FaTelegram,
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FaXTwitter,
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FaFacebook,
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FaInstagram,
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FaEnvelope,
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} from "react-icons/fa6";
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import { Copy, Loader2, Share2 } from "lucide-react";
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import {
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Drawer,
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DrawerContent,
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DrawerHeader,
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DrawerTitle,
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} from "@/components/ui/drawer";
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import { cn } from "@/lib/utils";
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import type { Post } from "@/lib/social";
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import { createShortLink } from "@/lib/share";
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import {
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displaySourceLabel,
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structuredReferenceForPost,
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} from "@/lib/source-reference";
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import { useAuth } from "@/components/auth/auth-provider";
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export function SharePostSheet({
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open,
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onClose,
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post,
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isMobile,
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}: {
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open: boolean;
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onClose: () => void;
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post: Post;
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isMobile: boolean;
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}) {
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// `reference` is the single-line citation used for UI chrome — the
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// drawer header, email subject, etc. where multi-line doesn't render.
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const reference = displaySourceLabel(post.source_url, post.source_title);
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// Structured `{ title, detail }` for the multi-line "Source:" block
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// in the share payload. Same helper that the direct-mobile native
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// share path in post-actions-footer.tsx uses, so both surfaces
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// produce byte-identical citation lines.
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const structuredRef = useMemo(
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() => structuredReferenceForPost(post.source_url, post.source_title),
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[post.source_url, post.source_title],
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);
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const firstImage = post.images?.[0]?.url ?? null;
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const { user } = useAuth();
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// The Send button is only rendered for owners, so user is guaranteed
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// non-null here; we still defensively fall back via `?? ""` rather than
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// crashing if the auth context blips during a re-render.
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const authorHandle = post.author_handle ?? user?.handle ?? "";
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const [shortUrl, setShortUrl] = useState<string | null>(null);
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const [shortening, setShortening] = useState(false);
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// navigator.share only exists on a subset of browsers (mainly mobile
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// Safari/Chrome and some desktop Safari builds). Capability-check once
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// on mount; combined with `isMobile` to gate the "More" tile so the
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// affordance only appears where it can do something useful.
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const [nativeShareSupported, setNativeShareSupported] = useState(false);
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// Pre-fetched File ready to attach to navigator.share. We build this
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// when the sheet opens — NOT lazily inside the "More" click handler —
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// because iOS Safari requires navigator.share() to fire within the
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// transient user activation window (~5 s after the tap). Awaiting a
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// network fetch in between burns that window and iOS rejects the
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// share. With the file pre-fetched, the tap → share() call is
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// synchronous in the same task.
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const [shareableFile, setShareableFile] = useState<File | null>(null);
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const [imageFetchError, setImageFetchError] = useState<string | null>(null);
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useEffect(() => {
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setNativeShareSupported(
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typeof navigator !== "undefined" &&
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typeof navigator.share === "function",
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);
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}, []);
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// Shorten the post's anchor URL on the author's feed when the sheet
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// opens. The path takes the form `/u/<handle>/posts#post-<id>`; the
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// BFF's ValidatePath tolerates fragments, and the destination page
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// already has a hash-anchor effect that scrolls to the post once the
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// feed loads, so the recipient lands on the right card automatically.
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useEffect(() => {
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if (!open) return;
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if (!authorHandle) return;
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let cancelled = false;
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setShortening(true);
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(async () => {
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try {
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const origin = window.location.origin;
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const longPath = `/u/${encodeURIComponent(authorHandle)}/posts#post-${post.id}`;
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const code = await createShortLink(longPath);
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if (cancelled) return;
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if (!code) {
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// Shorten failed — use the long URL so the share payload at
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// least carries SOMETHING clickable.
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setShortUrl(new URL(longPath, origin).toString());
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return;
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}
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setShortUrl(new URL(`/share/${code}`, origin).toString());
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} catch {
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// Should be unreachable — createShortLink swallows its own
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// failures. Fall back to a non-shortened long URL.
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if (!cancelled) {
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setShortUrl(
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new URL(
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`/u/${encodeURIComponent(authorHandle)}/posts#post-${post.id}`,
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window.location.origin,
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).toString(),
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);
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}
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} finally {
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if (!cancelled) setShortening(false);
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}
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})();
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return () => {
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cancelled = true;
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};
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}, [open, authorHandle, post.id]);
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// Pre-fetch the first image as a File while the sheet is open. By
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// the time the user taps "More" the File is already in memory, so
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// navigator.share fires synchronously in the same tap — preserving
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// iOS Safari's user-activation token. Without this, awaiting the
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// fetch INSIDE the click handler burns the activation window and
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// iOS rejects the share with NotAllowedError.
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//
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// We hit our same-origin proxy (/api/share-image/<id>) rather than
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// the raw R2 URL. Reason: even with R2's CORS policy set correctly,
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// browsers that have a pre-CORS response cached for the image (from
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// earlier <img> loads without a `Vary: Origin` header) will serve
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// that stale no-ACAO copy and the fetch fails CORS regardless of
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// how the bucket is configured. The proxy is same-origin so the
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// browser never sends an Origin header to R2 in the first place.
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//
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// Failures (4xx from the proxy, network error) are remembered in
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// imageFetchError so the click handler can toast a useful
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// explanation. We don't toast at fetch time because the user hasn't
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// committed to sharing yet — that would feel like noise.
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useEffect(() => {
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if (!open || !firstImage) {
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setShareableFile(null);
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setImageFetchError(null);
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return;
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}
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let cancelled = false;
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setShareableFile(null);
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setImageFetchError(null);
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const proxyUrl = `/api/share-image/${encodeURIComponent(post.id)}`;
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(async () => {
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try {
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const res = await fetch(proxyUrl);
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if (cancelled) return;
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if (!res.ok) {
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setImageFetchError(`HTTP ${res.status}`);
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console.warn(
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`[share] image proxy returned ${res.status} for post`,
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post.id,
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);
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return;
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}
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const blob = await res.blob();
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if (cancelled) return;
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const ext = (blob.type.split("/")[1] || "jpg").toLowerCase();
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const file = new File([blob], `share.${ext}`, {
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type: blob.type || "image/jpeg",
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});
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setShareableFile(file);
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} catch (err) {
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if (cancelled) return;
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setImageFetchError("network");
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console.warn(
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"[share] image proxy fetch failed for post",
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post.id,
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err,
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);
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}
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})();
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return () => {
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cancelled = true;
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};
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}, [open, firstImage, post.id]);
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// Canonical share payload — quote, "Source:" delimiter, structured
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// citation, link. Built lazily because shortUrl arrives async; while
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// loading we render a spinner instead. The structure mirrors
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// formatCopyText from selection-toolbar/shared.tsx exactly so the
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// Copy and Share flows produce identical text:
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//
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// "caption"
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//
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// Source:
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// Book Name
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// Chapter, Verse
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// short URL
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const shareText = useMemo(() => {
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if (!shortUrl) return "";
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const lines: string[] = [`“${post.caption}”`, "", "Source:"];
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lines.push(structuredRef.title);
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if (structuredRef.detail) lines.push(structuredRef.detail);
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lines.push(shortUrl);
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return lines.join("\n");
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}, [post.caption, structuredRef, shortUrl]);
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function openIntent(url: string) {
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window.open(url, "_blank", "noopener,noreferrer");
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onClose();
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}
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async function copyText(text: string, successMsg = "Copied") {
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try {
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await navigator.clipboard.writeText(text);
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toast.success(successMsg);
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} catch {
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toast.error("Could not copy");
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}
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onClose();
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}
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function shareNative() {
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// Crucially: this function must NOT await anything before calling
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// navigator.share. iOS Safari only honours the call inside the
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// tap's transient user-activation window; any awaited fetch /
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// microtask here would burn it and the share would be rejected as
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// NotAllowedError. The image is pre-fetched in the useEffect
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// above; here we just pick it up and fire.
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if (!nativeShareSupported) return;
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const payload: ShareData = {
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title: reference,
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text: shareText,
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};
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let attachedImage = false;
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if (
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shareableFile &&
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typeof navigator.canShare === "function" &&
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navigator.canShare({ files: [shareableFile] })
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) {
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payload.files = [shareableFile];
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attachedImage = true;
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} else if (firstImage && !shareableFile) {
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// Image existed on the post but pre-fetch didn't complete
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// (or failed). Surface the reason so the user knows why the
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// share is text-only — at the moment they actually share, not
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// earlier when the sheet first opened.
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if (imageFetchError === "network") {
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toast(
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"Couldn't load image for sharing — sharing text only",
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{ duration: 3000 },
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);
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} else if (imageFetchError) {
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toast(`Image not available (${imageFetchError}) — sharing text only`, {
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duration: 3000,
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});
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} else {
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toast("Still loading image — sharing text only", { duration: 2500 });
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}
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} else if (
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firstImage &&
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shareableFile &&
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typeof navigator.canShare === "function" &&
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!navigator.canShare({ files: [shareableFile] })
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) {
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// File is ready but the platform refuses it (rare on iOS — more
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// often desktop Chrome / Firefox). The "More" tile is already
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// gated on isMobile so this branch mainly catches edge cases.
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console.warn(
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"[share] navigator.canShare rejected files on this platform",
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);
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toast(
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"Your browser can't share images here — sharing text only",
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{ duration: 3000 },
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);
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}
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// Fire-and-forget — we don't await so React doesn't get a chance
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// to render in between the tap and the share call. The .catch
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// tail handles AbortError (user cancel) vs real failure for
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// diagnostics.
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navigator
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.share(payload)
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.then(() => onClose())
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.catch((err) => {
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const aborted =
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err instanceof DOMException && err.name === "AbortError";
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if (!aborted) {
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console.warn("[share] navigator.share threw", err);
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toast.error(
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`Share failed${
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attachedImage ? " (image may be too large for this app)" : ""
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}`,
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{ duration: 3000 },
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);
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}
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});
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}
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// Channel tiles — kept in a single declarative list so the JSX is just
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// a map. Each tile's onClick closes the sheet to give the user a clean
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// "done" signal.
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const targets: ShareTarget[] = [
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{
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key: "whatsapp",
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label: "WhatsApp",
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brandClass: "text-[#25D366]",
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icon: <FaWhatsapp className="size-6" />,
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onClick: () =>
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openIntent(`https://wa.me/?text=${encodeURIComponent(shareText)}`),
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},
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{
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key: "telegram",
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label: "Telegram",
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brandClass: "text-[#229ED9]",
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icon: <FaTelegram className="size-6" />,
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onClick: () => {
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// Telegram's share URL splits text + url so the link is
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// attached as a separate entity (better preview rendering).
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// Keep the same multi-line citation — including the "Source:"
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// delimiter — as the canonical share text. Telegram preserves
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// newlines in the message body so the structure carries over.
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const lines = [
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`“${post.caption}”`,
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"",
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"Source:",
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structuredRef.title,
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];
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if (structuredRef.detail) lines.push(structuredRef.detail);
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const params = new URLSearchParams({
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url: shortUrl ?? "",
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text: lines.join("\n"),
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});
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openIntent(`https://t.me/share/url?${params.toString()}`);
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},
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},
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{
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key: "x",
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label: "X",
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brandClass: "text-foreground",
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icon: <FaXTwitter className="size-6" />,
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onClick: () =>
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openIntent(
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`https://twitter.com/intent/tweet?text=${encodeURIComponent(shareText)}`,
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),
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},
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{
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key: "facebook",
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label: "Facebook",
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brandClass: "text-[#1877F2]",
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icon: <FaFacebook className="size-6" />,
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// Facebook's web sharer ignores prefilled text for non-FB-app
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// shares, so we send only the URL — FB scrapes OG tags from the
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// linked page. The user can paste the rest before posting.
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onClick: () =>
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openIntent(
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`https://www.facebook.com/sharer/sharer.php?u=${encodeURIComponent(shortUrl ?? "")}`,
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),
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},
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{
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key: "instagram",
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label: "Instagram",
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brandClass: "text-[#E1306C]",
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icon: <FaInstagram className="size-6" />,
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// Instagram has no public web share intent. Copy the payload and
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// tell the user where it'll land.
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onClick: () =>
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copyText(shareText, "Copied — open Instagram and paste"),
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},
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{
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key: "email",
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label: "Email",
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brandClass: "text-muted-foreground",
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icon: <FaEnvelope className="size-6" />,
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onClick: () => {
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// mailto: drives the user's default mail client. Some clients
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// crop very long bodies; the user can edit before sending.
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const href =
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`mailto:?subject=${encodeURIComponent(reference)}` +
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`&body=${encodeURIComponent(shareText)}`;
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window.location.href = href;
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onClose();
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},
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},
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{
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key: "copy",
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label: "Copy",
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brandClass: "text-muted-foreground",
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icon: <Copy className="size-6" />,
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onClick: () => copyText(shareText),
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},
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];
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const direction = isMobile ? "bottom" : "right";
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return (
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<Drawer
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open={open}
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onOpenChange={(o) => !o && onClose()}
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direction={direction}
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>
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<DrawerContent direction={direction} className="bg-card select-none">
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<DrawerHeader className="text-left border-b border-border pb-4">
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<DrawerTitle>Share post</DrawerTitle>
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<p className="text-xs text-muted-foreground mt-1 line-clamp-2">
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“{post.caption.slice(0, 140)}
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{post.caption.length > 140 ? "…" : ""}”
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</p>
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<p className="text-[10px] uppercase tracking-[0.2em] text-muted-foreground/80 mt-1">
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{reference}
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</p>
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</DrawerHeader>
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<div className="p-4 sm:p-6 overflow-y-auto">
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{shortening ? (
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<div className="flex items-center justify-center py-10 text-muted-foreground">
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<Loader2 className="size-5 animate-spin" />
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</div>
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) : (
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<div className="grid grid-cols-4 gap-3 sm:grid-cols-5">
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{targets.map((t) => (
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<ShareTile key={t.key} target={t} />
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))}
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{isMobile && nativeShareSupported ? (
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<ShareTile
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target={{
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key: "native",
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label: "More",
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brandClass: "text-foreground",
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icon: <Share2 className="size-6" />,
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onClick: shareNative,
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}}
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/>
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) : null}
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</div>
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)}
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</div>
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</DrawerContent>
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</Drawer>
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);
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}
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// ─── Pieces ────────────────────────────────────────────────────────────
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type ShareTarget = {
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key: string;
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label: string;
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/** Tailwind text color class applied to the icon — usually the brand's
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* hex, falling back to text-foreground / text-muted-foreground. */
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brandClass: string;
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icon: React.ReactNode;
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onClick: () => void;
|
|
};
|
|
|
|
function ShareTile({ target }: { target: ShareTarget }) {
|
|
return (
|
|
<button
|
|
type="button"
|
|
onClick={target.onClick}
|
|
className={cn(
|
|
"flex flex-col items-center gap-1.5 rounded-lg p-2 sm:p-3",
|
|
"hover:bg-muted transition-colors",
|
|
"outline-none focus-visible:ring-2 focus-visible:ring-ring",
|
|
)}
|
|
>
|
|
<span
|
|
className={cn(
|
|
"flex items-center justify-center size-12 rounded-full",
|
|
"bg-muted",
|
|
target.brandClass,
|
|
)}
|
|
>
|
|
{target.icon}
|
|
</span>
|
|
<span className="text-[11px] text-foreground text-center leading-tight">
|
|
{target.label}
|
|
</span>
|
|
</button>
|
|
);
|
|
}
|