Henry_Du
7812d47f0c
重写服务器端SVG生成逻辑，将原铁路线路图生成功能替换为站点间票价矩阵生成。 优化前端换乘路径绘制：新增线路偏移与弯道处理，避免多条线路路径重叠。 修复站点标记的外层圆圈填充颜色，使其正确使用对应线路的配色。
224 lines
8.1 KiB
JavaScript
224 lines
8.1 KiB
JavaScript
const escapeHTML = (s) => String(s || '')
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.replace(/&/g, '&')
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.replace(/</g, '<')
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.replace(/>/g, '>')
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.replace(/"/g, '"')
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.replace(/'/g, ''');
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function generate(stations, lines, fares, nameByCode, transfers) {
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const enNameByCode = (() => {
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try {
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const map = {};
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for (const s of (stations || [])) {
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map[String(s.code || '')] = s.en_name || s.enName || '';
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}
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return map;
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} catch (_) {
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return {};
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}
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})();
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const linesForStation = {};
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(lines || []).forEach((li) => {
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const id = li.id || '';
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const name = li.name || li.cn_name || '';
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const color = li.color || '#93a2b7';
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const arr = (Array.isArray(li.stations) ? li.stations : (Array.isArray(li.stops) ? li.stops : [])).map((x) => String(x));
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for (const code of arr) {
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if (!linesForStation[code]) linesForStation[code] = [];
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linesForStation[code].push({ id, name, color, stations: arr });
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}
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});
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const groupsMap = {};
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(stations || []).forEach((s) => {
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const k = String(s.name || s.cn_name || s.station_name || s.en_name || '').trim();
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if (!k) return;
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if (!groupsMap[k]) groupsMap[k] = [];
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groupsMap[k].push(String(s.code || ''));
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});
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const groupsForColors = Object.values(groupsMap).filter((arr) => arr.length > 1);
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const colorsForRoute = (a, b) => {
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const la = linesForStation[a] || [];
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const lb = linesForStation[b] || [];
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const same = la.find((x) => lb.some((y) => y.id === x.id));
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if (same) return [same.color || '#93a2b7'];
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for (const g of groupsForColors) {
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const startLine = la.find((li) => (li.stations || []).some((code) => g.includes(code)));
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const endLine = lb.find((li) => (li.stations || []).some((code) => g.includes(code)));
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if (startLine && endLine) {
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const c1 = startLine.color || '#93a2b7';
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const c2 = endLine.color || '#93a2b7';
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return (startLine.id === endLine.id) ? [c1] : [c1, c2];
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}
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}
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return [];
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};
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const buildGraph = () => {
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const adj = new Map();
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const addNode = (c) => { if (!adj.has(c)) adj.set(c, new Map()); };
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const addEdge = (u, v, w) => {
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addNode(u);
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addNode(v);
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adj.get(u).set(v, w);
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adj.get(v).set(u, w);
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};
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const validStationCodes = new Set((stations || []).map((s) => String(s.code || '')));
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(fares || []).forEach((f) => {
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const a = String(f.from || '');
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const b = String(f.to || '');
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if (!a || !b) return;
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if (!validStationCodes.has(a) || !validStationCodes.has(b)) return;
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const w = Number(f.cost_regular ?? f.cost) || 0;
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addEdge(a, b, w);
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});
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if (Array.isArray(transfers)) {
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transfers.forEach((p) => {
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const u = String(p[0] || '');
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const v = String(p[1] || '');
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if (u && v && validStationCodes.has(u) && validStationCodes.has(v)) {
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addEdge(u, v, 0);
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}
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});
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}
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(stations || []).forEach((s) => {
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const c = String(s.code || '');
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if (c) addNode(c);
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});
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return adj;
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};
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const adj = buildGraph();
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const codes = Array.from(adj.keys()).sort((a, b) => a.localeCompare(b));
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const neighborsOf = (u) => adj.get(u) || new Map();
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const dijkstra = (src) => {
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const dist = {};
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const visited = new Set();
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for (const n of adj.keys()) dist[n] = Infinity;
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dist[src] = 0;
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while (true) {
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let u = null;
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let best = Infinity;
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for (const n of adj.keys()) {
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if (!visited.has(n) && dist[n] < best) {
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best = dist[n];
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u = n;
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}
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}
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if (u === null) break;
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visited.add(u);
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for (const [v, w] of neighborsOf(u)) {
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const nd = dist[u] + Number(w || 0);
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if (nd < dist[v]) dist[v] = nd;
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}
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}
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return dist;
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};
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const distAll = {};
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codes.forEach((c) => {
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distAll[c] = dijkstra(c);
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});
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let maxFare = 1;
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for (const r of codes) {
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for (const c of codes) {
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if (r === c) continue;
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const v = Number(distAll[r][c] || 0);
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if (v > maxFare) maxFare = v;
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}
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}
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const margin = 8;
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const cellW = 56;
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const cellH = 40;
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const estimateWidth = (text, size) => Math.ceil(String(text || '').length * (size <= 10 ? 7 : 10));
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const maxCnW = Math.max(1, ...codes.map((c) => estimateWidth(nameByCode[c] || c, 14)));
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const maxEnW = Math.max(1, ...codes.map((c) => estimateWidth(enNameByCode[c] || '', 10)));
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const maxCodeW = Math.max(1, ...codes.map((c) => estimateWidth(c, 10)));
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const leftW = Math.max(140, 24 + Math.max(maxCnW, maxEnW, maxCodeW));
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const topH = 64;
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const n = codes.length;
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const width = margin + leftW + n * cellW + margin;
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const height = margin + topH + n * cellH + margin;
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let svg = `<svg xmlns="http://www.w3.org/2000/svg" width="${width}" height="${height}" viewBox="0 0 ${width} ${height}" style="background:#ffffff;font-family:Inter, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif">`;
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for (let j = 0; j < n; j++) {
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const code = codes[j];
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const name = nameByCode[code] || code;
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const en = enNameByCode[code] || '';
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const x = margin + leftW + j * cellW + cellW / 2;
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const y = margin + 20;
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svg += `<text x="${x}" y="${y}" font-size="14" font-weight="900" fill="#000000" text-anchor="middle">${escapeHTML(name)}</text>`;
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if (en) svg += `<text x="${x}" y="${y + 14}" font-size="10" fill="#000000" text-anchor="middle">${escapeHTML(en)}</text>`;
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svg += `<text x="${x}" y="${y + 26}" font-size="10" fill="#000000" text-anchor="middle">${escapeHTML(code)}</text>`;
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}
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for (let i = 0; i < n; i++) {
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const code = codes[i];
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const name = nameByCode[code] || code;
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const en = enNameByCode[code] || '';
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const xText = margin + 6;
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const baseY = margin + topH + i * cellH + 22;
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svg += `<text x="${xText}" y="${baseY - 10}" font-size="14" font-weight="900" fill="#000000">${escapeHTML(name)}</text>`;
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if (en) svg += `<text x="${xText}" y="${baseY + 4}" font-size="10" fill="#000000">${escapeHTML(en)}</text>`;
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svg += `<text x="${xText}" y="${baseY + 16}" font-size="10" fill="#000000">${escapeHTML(code)}</text>`;
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for (let j = 0; j < n; j++) {
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const x0 = margin + leftW + j * cellW;
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const y0 = margin + topH + i * cellH;
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svg += `<rect x="${x0}" y="${y0}" width="${cellW}" height="${cellH}" fill="#ffffff" stroke="#e5e7eb"/>`;
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if (i === j) {
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svg += `<text x="${x0 + cellW / 2}" y="${y0 + 22}" font-size="12" fill="#6b7280" text-anchor="middle">-</text>`;
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} else {
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const distVal = distAll[code][codes[j]];
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if (distVal === Infinity || !Number.isFinite(distVal)) {
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svg += `<text x="${x0 + cellW / 2}" y="${y0 + 22}" font-size="14" font-weight="800" fill="#ef4444" text-anchor="middle">×</text>`;
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} else {
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const val = Math.round(Number(distVal || 0));
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const routeColors = colorsForRoute(code, codes[j]);
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if (routeColors.length > 0) {
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const stripW = cellW / routeColors.length;
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for (let k = 0; k < routeColors.length; k++) {
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const c = routeColors[k] || '#93a2b7';
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const stripX = x0 + k * stripW;
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svg += `<rect x="${stripX}" y="${y0}" width="${stripW}" height="${cellH}" fill="${escapeHTML(c)}" fill-opacity="0.15" stroke="none"/>`;
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}
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} else {
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svg += `<rect x="${x0}" y="${y0}" width="${cellW}" height="${cellH}" fill="#000000" fill-opacity="0.03" stroke="none"/>`;
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}
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svg += `<rect x="${x0}" y="${y0}" width="${cellW}" height="${cellH}" fill="none" stroke="#e5e7eb" stroke-width="0.5"/>`;
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svg += `<text x="${x0 + cellW / 2}" y="${y0 + 22}" font-size="12" font-weight="800" fill="#000000" text-anchor="middle">${escapeHTML(String(val))}</text>`;
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const dots = routeColors.slice(0, 4);
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for (let k = 0; k < dots.length; k++) {
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const cx = x0 + 8 + k * 10;
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const cy = y0 + 10;
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const dotColor = dots[k] || '#93a2b7';
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svg += `<circle cx="${cx}" cy="${cy}" r="3.5" fill="${escapeHTML(dotColor)}" stroke="white" stroke-width="1"/>`;
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}
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}
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}
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}
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}
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svg += `</svg>`;
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return svg;
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}
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module.exports = { generate };
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