265 lines
12 KiB
TypeScript
265 lines
12 KiB
TypeScript
"use client";
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import { useCallback, useEffect, useRef, useState } from "react";
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import { lmsApi, getLmsApiUrl, getToken, CollaborativeDoc, UpdateCollaborativeDocResponse } from "@/lib/api";
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import {
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AlertTriangle,
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CheckCircle,
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Loader2,
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Save,
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Users,
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} from "lucide-react";
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type ConflictInfo = {
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localContent: string;
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serverContent: string;
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serverRevision: number;
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};
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type Props = {
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lessonId: string;
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};
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export default function CollaborativeDocEditor({ lessonId }: Props) {
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const [content, setContent] = useState("");
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const [revision, setRevision] = useState(0);
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const [saving, setSaving] = useState(false);
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const [status, setStatus] = useState<"idle" | "saved" | "conflict" | "error">("idle");
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const [conflict, setConflict] = useState<ConflictInfo | null>(null);
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const [activeEditors, setActiveEditors] = useState(0);
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const debounceRef = useRef<ReturnType<typeof setTimeout> | null>(null);
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const sseRef = useRef<EventSource | null>(null);
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const localDirtyRef = useRef(false);
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const revisionRef = useRef(0);
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const contentRef = useRef("");
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// Cargar documento inicial
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useEffect(() => {
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void (async () => {
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try {
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const doc: CollaborativeDoc = await lmsApi.getLessonCollaborativeDoc(lessonId);
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setContent(doc.content);
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setRevision(doc.revision);
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revisionRef.current = doc.revision;
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contentRef.current = doc.content;
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} catch {
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setStatus("error");
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}
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})();
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}, [lessonId]);
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// SSE: escuchar cambios remotos
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useEffect(() => {
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const token = getToken() || "";
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const baseUrl = getLmsApiUrl();
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const url = `${baseUrl}/lessons/${lessonId}/collaborative-doc/stream${token ? `?preview_token=${encodeURIComponent(token)}` : ""}`;
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const es = new EventSource(url);
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sseRef.current = es;
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es.onmessage = (e) => {
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try {
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const data = JSON.parse(e.data as string) as {
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content: string;
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revision: number;
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};
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// Solo actualizar si no tenemos cambios locales pendientes
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if (!localDirtyRef.current && data.revision !== revisionRef.current) {
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setContent(data.content);
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setRevision(data.revision);
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revisionRef.current = data.revision;
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contentRef.current = data.content;
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}
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// Contar "editores activos" como señal de conexión SSE viva
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setActiveEditors((n) => Math.max(1, n));
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} catch { /* ignore */ }
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};
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es.onerror = () => {
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setActiveEditors(0);
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};
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return () => {
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es.close();
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sseRef.current = null;
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};
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}, [lessonId]);
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// Guardar con debounce 1.5s
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const save = useCallback(async (text: string, baseRevision: number) => {
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setSaving(true);
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setStatus("idle");
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try {
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const res: UpdateCollaborativeDocResponse = await lmsApi.updateLessonCollaborativeDoc(lessonId, {
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content: text,
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base_revision: baseRevision,
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});
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if (res.conflict) {
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setConflict({
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localContent: text,
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serverContent: res.server_content ?? "",
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serverRevision: res.server_revision ?? baseRevision,
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});
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setStatus("conflict");
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} else {
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setRevision(res.revision);
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revisionRef.current = res.revision;
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contentRef.current = text;
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localDirtyRef.current = false;
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setStatus("saved");
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setTimeout(() => setStatus("idle"), 2000);
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}
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} catch {
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setStatus("error");
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} finally {
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setSaving(false);
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}
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}, [lessonId]);
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const handleChange = (value: string) => {
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setContent(value);
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contentRef.current = value;
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localDirtyRef.current = true;
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setStatus("idle");
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if (debounceRef.current) clearTimeout(debounceRef.current);
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debounceRef.current = setTimeout(() => {
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void save(contentRef.current, revisionRef.current);
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}, 1500);
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};
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// Resolución de conflictos
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const resolveKeepMine = () => {
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if (!conflict) return;
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setConflict(null);
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setStatus("idle");
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// Forzar guardado con la revisión del servidor (sobreescribir)
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void save(conflict.localContent, conflict.serverRevision);
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};
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const resolveKeepServer = () => {
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if (!conflict) return;
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setContent(conflict.serverContent);
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setRevision(conflict.serverRevision);
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revisionRef.current = conflict.serverRevision;
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contentRef.current = conflict.serverContent;
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localDirtyRef.current = false;
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setConflict(null);
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setStatus("idle");
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};
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// Toolbar: aplicar formato HTML básico via execCommand (compatible con contenteditable)
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// Para mantener simpleza y no depender de librerías externas usamos un <textarea>
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// con soporte de Markdown ligero renderizado al vuelo.
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return (
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<div className="flex flex-col gap-3 w-full">
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{/* Barra de estado */}
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<div className="flex items-center justify-between px-1">
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<div className="flex items-center gap-2 text-xs text-black/50 dark:text-white/40">
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<Users className="w-3 h-3" />
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<span>{activeEditors > 0 ? "Conexión en vivo" : "Sin conexión SSE"}</span>
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<span className="opacity-50">· Rev. {revision}</span>
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</div>
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<div className="flex items-center gap-1 text-xs">
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{saving && <Loader2 className="w-3 h-3 animate-spin text-blue-500" />}
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{status === "saved" && <CheckCircle className="w-3 h-3 text-green-500" />}
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{status === "conflict" && <AlertTriangle className="w-3 h-3 text-amber-500" />}
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{status === "error" && <AlertTriangle className="w-3 h-3 text-red-500" />}
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{saving && <span className="text-blue-500">Guardando…</span>}
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{status === "saved" && <span className="text-green-500">Guardado</span>}
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{status === "conflict" && <span className="text-amber-500">Conflicto detectado</span>}
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{status === "error" && <span className="text-red-500">Error al guardar</span>}
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</div>
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</div>
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{/* Toolbar de formato */}
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<div className="flex items-center gap-1 px-2 py-1 rounded-lg bg-black/5 dark:bg-white/5 border border-black/10 dark:border-white/10 text-xs font-mono">
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{[
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{ label: "B", title: "Negrita: **texto**", insert: "**texto**" },
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{ label: "I", title: "Cursiva: _texto_", insert: "_texto_" },
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{ label: "H1", title: "Título: # Título", insert: "\n# Título\n" },
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{ label: "H2", title: "Subtítulo: ## Subtítulo", insert: "\n## Subtítulo\n" },
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{ label: "• Lista", title: "Lista: - ítem", insert: "\n- ítem\n" },
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{ label: "1. Lista", title: "Lista ordenada: 1. ítem", insert: "\n1. ítem\n" },
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{ label: "---", title: "Separador", insert: "\n---\n" },
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].map((btn) => (
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<button
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key={btn.label}
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title={btn.title}
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className="px-2 py-0.5 rounded hover:bg-black/10 dark:hover:bg-white/10"
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onMouseDown={(e) => {
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e.preventDefault();
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const newContent = contentRef.current + btn.insert;
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setContent(newContent);
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handleChange(newContent);
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}}
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>
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{btn.label}
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</button>
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))}
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<div className="ml-auto">
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<button
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title="Guardar ahora"
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className="px-2 py-0.5 rounded hover:bg-black/10 dark:hover:bg-white/10 flex items-center gap-1"
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onClick={() => void save(contentRef.current, revisionRef.current)}
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>
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<Save className="w-3 h-3" /> Guardar
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</button>
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</div>
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</div>
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{/* Área de edición */}
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<textarea
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className="w-full min-h-[320px] rounded-xl border border-black/10 dark:border-white/10 bg-white dark:bg-zinc-900 px-4 py-3 text-sm font-mono leading-relaxed resize-y focus:outline-none focus:ring-2 focus:ring-blue-500/40"
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value={content}
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onChange={(e) => handleChange(e.target.value)}
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placeholder="Empieza a escribir… Los cambios se sincronizan automáticamente con el grupo."
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spellCheck
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/>
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{/* Panel de conflicto */}
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{conflict && (
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<div className="rounded-xl border border-amber-300 dark:border-amber-600 bg-amber-50 dark:bg-amber-900/20 p-4 space-y-3">
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<div className="flex items-center gap-2 text-sm font-black text-amber-800 dark:text-amber-300">
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<AlertTriangle className="w-4 h-4" />
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Conflicto de edición
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</div>
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<p className="text-xs text-amber-700 dark:text-amber-400">
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Otro usuario guardó cambios mientras editabas. ¿Qué versión deseas conservar?
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</p>
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<div className="grid grid-cols-2 gap-3 text-xs">
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<div>
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<div className="font-semibold mb-1 text-amber-700 dark:text-amber-300">Tu versión</div>
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<pre className="rounded-lg bg-white dark:bg-black/30 p-2 overflow-auto max-h-32 whitespace-pre-wrap text-[11px]">
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{conflict.localContent.slice(0, 300)}{conflict.localContent.length > 300 ? "…" : ""}
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</pre>
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</div>
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<div>
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<div className="font-semibold mb-1 text-amber-700 dark:text-amber-300">Versión del servidor (Rev. {conflict.serverRevision})</div>
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<pre className="rounded-lg bg-white dark:bg-black/30 p-2 overflow-auto max-h-32 whitespace-pre-wrap text-[11px]">
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{conflict.serverContent.slice(0, 300)}{conflict.serverContent.length > 300 ? "…" : ""}
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</pre>
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</div>
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</div>
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<div className="flex gap-2">
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<button
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onClick={resolveKeepMine}
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className="px-3 py-1.5 rounded-lg bg-amber-600 text-white text-xs font-semibold hover:bg-amber-700"
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>
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Conservar la mía
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</button>
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<button
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onClick={resolveKeepServer}
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className="px-3 py-1.5 rounded-lg border border-black/10 dark:border-white/10 text-xs font-semibold hover:bg-black/5 dark:hover:bg-white/10"
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>
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Usar la del servidor
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</button>
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</div>
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</div>
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)}
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</div>
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);
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}
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