323 lines
10 KiB
JavaScript
323 lines
10 KiB
JavaScript
import { showStatusMessage } from "./ui.js";
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import { isTVPanelVisible } from "./tv.js";
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// News aggregation now lives inside the shared media panel:
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// - outer shell: #media-panel
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// - this module renders into inner pane: #news-panel
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const EARTH_NEWS_API = "/api/v1/news/earth-feed";
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const FOCUS_UPDATE_INTERVAL_MS = 4000;
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const DATA_REFRESH_INTERVAL_MS = 180000;
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const MIN_REGION_SWITCH_INTERVAL_MS = 2500;
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const REQUEST_TIMEOUT_MS = 15000;
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let initialized = false;
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let refreshPromise = null;
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let payload = null;
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let lastFocus = null;
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let lastFetchAt = 0;
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let lastRegionSwitchAt = 0;
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function getElements() {
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const isMobile = document.body.classList.contains("layout-mode-mobile");
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return {
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refreshBtn: document.getElementById(isMobile ? "mobile-news-refresh" : "news-refresh"),
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openBtn: document.getElementById(isMobile ? "mobile-news-open-external" : "news-open-external"),
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status: document.getElementById(isMobile ? "mobile-news-board-status" : "news-board-status"),
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focusLabel: document.getElementById(isMobile ? "mobile-news-focus-label" : "news-focus-label"),
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focusCoords: document.getElementById(isMobile ? "mobile-news-focus-coords" : "news-focus-coords"),
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sourceCount: document.getElementById(isMobile ? "mobile-news-source-count" : "news-source-count"),
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regionChip: document.getElementById("news-region-chip"),
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board: document.getElementById(isMobile ? "mobile-news-board-list" : "news-board-list"),
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empty: document.getElementById(isMobile ? "mobile-news-board-empty" : "news-board-empty"),
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feedAnchor: document.getElementById(isMobile ? "mobile-news-feed-anchor" : "news-feed-anchor"),
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};
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}
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function formatCoord(value, positiveLabel, negativeLabel) {
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const abs = Math.abs(value).toFixed(1);
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return `${abs}°${value >= 0 ? positiveLabel : negativeLabel}`;
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}
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function formatRelativeTime(raw) {
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if (!raw) return "刚刚同步";
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const date = new Date(raw);
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if (Number.isNaN(date.getTime())) return "刚刚同步";
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const diff = Date.now() - date.getTime();
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const minutes = Math.max(1, Math.round(diff / 60000));
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if (minutes < 60) return `${minutes} 分钟前`;
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const hours = Math.round(minutes / 60);
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if (hours < 24) return `${hours} 小时前`;
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const days = Math.round(hours / 24);
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return `${days} 天前`;
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}
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export function updateNewsToggleUI(visible) {
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void visible;
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}
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function renderEmptyState(message) {
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const { board, empty, status, openBtn } = getElements();
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if (board) board.innerHTML = "";
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if (empty) {
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empty.hidden = false;
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empty.textContent = message;
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}
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if (status) {
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status.textContent = "等待聚合新闻源";
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}
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if (openBtn) openBtn.disabled = true;
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}
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function renderPayload(nextPayload) {
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payload = nextPayload;
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const {
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board,
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empty,
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status,
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focusLabel,
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focusCoords,
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sourceCount,
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regionChip,
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openBtn,
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feedAnchor,
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} = getElements();
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const items = Array.isArray(nextPayload?.items) ? nextPayload.items : [];
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const sources = Array.isArray(nextPayload?.sources) ? nextPayload.sources : [];
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const focus = nextPayload?.focus || {};
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if (!board || !status || !focusLabel || !focusCoords || !sourceCount || !regionChip) {
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if (document.body.classList.contains("layout-mode-mobile")) {
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// Mobile page omits the region chip shell, but the rest of the page is still renderable.
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if (!board || !status || !focusLabel || !focusCoords || !sourceCount) {
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return;
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}
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} else {
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return;
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}
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}
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if (regionChip) {
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regionChip.textContent = focus.region || "global";
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regionChip.style.setProperty("--news-accent", focus.accent || "#d6e6ff");
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}
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if (document.body.classList.contains("layout-mode-mobile")) {
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// Mobile page does not show the compact chip row.
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} else if (!regionChip) {
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return;
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}
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focusLabel.textContent = focus.label || "全球焦点";
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if (typeof focus.lat === "number" && typeof focus.lon === "number") {
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focusCoords.textContent = `${formatCoord(focus.lat, "N", "S")} · ${formatCoord(focus.lon, "E", "W")}`;
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} else {
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focusCoords.textContent = "跟随当前视角自动聚焦";
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}
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sourceCount.textContent = `${sources.length} 路聚合源`;
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if (nextPayload?.stale) {
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status.textContent = `当前显示最近一次可用新闻缓存，共 ${items.length} 条`;
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} else {
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status.textContent = nextPayload?.errors?.length
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? `已聚合 ${items.length} 条，部分源不可用`
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: `已聚合 ${items.length} 条态势新闻`;
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}
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if (feedAnchor) {
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const matchedSource = sources.find((source) => source.region === focus.region) || sources[0];
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feedAnchor.href = matchedSource?.homepage_url || "https://news.google.com/";
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}
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if (openBtn) {
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openBtn.disabled = !feedAnchor?.href;
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}
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if (items.length === 0) {
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board.innerHTML = "";
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if (empty) {
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empty.hidden = false;
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empty.textContent = "当前未拉到可用新闻，请稍后刷新或切换视角区域。";
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}
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return;
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}
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if (empty) empty.hidden = true;
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board.innerHTML = items
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.map((item) => {
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const cardClass = item.is_focus_match
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? "news-story-card news-story-card--focus"
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: "news-story-card";
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const summary = item.summary
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? `<div class="news-story-summary">${item.summary}</div>`
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: "";
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return `
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<a class="${cardClass}" href="${item.url}" target="_blank" rel="noreferrer noopener">
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<div class="news-story-meta">
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<span class="news-story-source">${item.source}</span>
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<span class="news-story-time">${formatRelativeTime(item.published_at)}</span>
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</div>
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<div class="news-story-title">${item.title}</div>
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${summary}
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<div class="news-story-tags">
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<span class="news-story-tag">${item.region}</span>
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<span class="news-story-tag">${item.feed_name}</span>
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</div>
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</a>
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`;
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})
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.join("");
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}
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async function fetchNews(lat, lon) {
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const url = new URL(EARTH_NEWS_API, window.location.origin);
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if (typeof lat === "number") url.searchParams.set("lat", lat.toFixed(4));
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if (typeof lon === "number") url.searchParams.set("lon", lon.toFixed(4));
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const controller = new AbortController();
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const timeoutId = window.setTimeout(() => controller.abort(), REQUEST_TIMEOUT_MS);
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const response = await fetch(url.toString(), {
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cache: "no-store",
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signal: controller.signal,
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}).finally(() => {
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window.clearTimeout(timeoutId);
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});
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if (!response.ok) {
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throw new Error(`新闻源请求失败: ${response.status}`);
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}
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return response.json();
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}
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async function refreshNews(lat, lon, { silent = false } = {}) {
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if (refreshPromise) return refreshPromise;
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const { status } = getElements();
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if (status) {
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status.textContent = "正在同步全球态势新闻...";
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}
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refreshPromise = fetchNews(lat, lon)
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.then((nextPayload) => {
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renderPayload(nextPayload);
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lastFetchAt = Date.now();
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if (Array.isArray(nextPayload?.items) && nextPayload.items.length === 0) {
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const { status } = getElements();
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if (status) {
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status.textContent = "当前区域暂无可用新闻，已完成一次聚合尝试";
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}
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}
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return nextPayload;
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})
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.catch((error) => {
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console.error("加载 Earth RSS 新闻失败:", error);
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const message = error?.name === "AbortError"
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? "新闻聚合请求超时，请稍后重试"
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: `新闻聚合暂时不可用: ${error?.message || "未知错误"}`;
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if (!payload) {
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renderEmptyState(message);
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} else if (!silent) {
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showStatusMessage("态势新闻同步失败", "error");
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}
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throw error;
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})
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.finally(() => {
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refreshPromise = null;
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});
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return refreshPromise;
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}
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function shouldRefreshForFocus(lat, lon, region) {
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const now = Date.now();
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if (!lastFocus) return true;
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if (region !== lastFocus.region && now - lastRegionSwitchAt > MIN_REGION_SWITCH_INTERVAL_MS) {
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lastRegionSwitchAt = now;
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return true;
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}
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if (now - lastFetchAt > DATA_REFRESH_INTERVAL_MS) return true;
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if (now - (lastFocus.updatedAt || 0) < FOCUS_UPDATE_INTERVAL_MS) return false;
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const latDrift = Math.abs((lat || 0) - (lastFocus.lat || 0));
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const lonDrift = Math.abs((lon || 0) - (lastFocus.lon || 0));
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return latDrift >= 18 || lonDrift >= 25;
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}
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function inferRegion(lat, lon) {
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if (typeof lat !== "number" || typeof lon !== "number") return "global";
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if (lon >= -170 && lon <= -30) return "americas";
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if (lon > -30 && lon <= 45) return lat >= 30 ? "europe" : "middle-east-africa";
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if (lon > 45 && lon <= 150) return lat < 10 ? "middle-east-africa" : "asia-pacific";
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return "asia-pacific";
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}
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function openCurrentSourceHomepage() {
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const { feedAnchor } = getElements();
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if (feedAnchor?.href) {
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window.open(feedAnchor.href, "_blank", "noopener,noreferrer");
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}
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}
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export function updateNewsViewFocus(coords) {
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if (!initialized) return;
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if (!coords || typeof coords.lat !== "number" || typeof coords.lon !== "number") return;
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const region = inferRegion(coords.lat, coords.lon);
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const nextFocus = {
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lat: coords.lat,
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lon: coords.lon,
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region,
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updatedAt: Date.now(),
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};
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const shouldRefresh = shouldRefreshForFocus(coords.lat, coords.lon, region);
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lastFocus = nextFocus;
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if (shouldRefresh) {
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refreshNews(coords.lat, coords.lon, { silent: true }).catch(() => {});
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}
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}
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export async function ensureNewsPanelReady() {
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if (!initialized) {
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initNewsPanel();
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}
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if (!payload) {
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await refreshNews(lastFocus?.lat, lastFocus?.lon);
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}
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return payload;
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}
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export function initNewsPanel() {
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if (initialized) return;
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initialized = true;
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updateNewsToggleUI(isTVPanelVisible());
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renderEmptyState("正在准备全球态势新闻聚合源...");
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window.addEventListener("earth:tv-tab-change", () => {
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updateNewsToggleUI(isTVPanelVisible());
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});
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window.addEventListener("earth:tv-visibility-change", (event) => {
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updateNewsToggleUI(Boolean(event.detail?.visible));
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});
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["news-refresh", "mobile-news-refresh"].forEach((id) => {
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const refreshBtn = document.getElementById(id);
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refreshBtn?.addEventListener("click", async () => {
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try {
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await refreshNews(lastFocus?.lat, lastFocus?.lon);
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showStatusMessage("态势新闻已刷新", "info");
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} catch {
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showStatusMessage("态势新闻刷新失败", "error");
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}
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});
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});
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["news-open-external", "mobile-news-open-external"].forEach((id) => {
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const openBtn = document.getElementById(id);
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openBtn?.addEventListener("click", openCurrentSourceHomepage);
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});
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refreshNews(undefined, undefined, { silent: true }).catch(() => {});
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}
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