refactor app, move to src folder and separate api folder

src/api/badge.js

@@ -0,0 +1,146 @@
+const router = require('express').Router();
+const axios = require('axios');
+
+router.get('/badge', async (req, res) => {
+  const {
+    icon = 'simpleicons',
+    label = 'Simple Icons',
+    style = 'rect', // badge stílusa: rect (négyzetes), flat (lekerekített sarkok)
+    bgicon = 'none',   // ikon háttérszín, alap: világosszürke
+    bglabel = 'none',  // label háttérszín, alap: sötétszürke
+    color = '#000000',
+    size = 24,
+    labelpos = 'right',
+    fontweight = 'normal',
+  } = req.query;
+
+  try {
+    // download icon SVG from SimpleIcons CDN
+    const iconUrl = `https://cdn.simpleicons.org/${icon}?viewbox=auto&size=${size}`;
+    const iconResponse = await axios.get(iconUrl, { responseType: 'text' });
+    if (iconResponse.status !== 200) {
+      return res.status(404).send('Icon not found');
+    }
+    const iconSVG = iconResponse.data;
+
+    // if there is no label query, use the title from the SVG
+    let effectiveLabel = label;
+    if (!req.query.label || req.query.label === 'Simple Icons') {
+      const titleMatch = iconSVG.match(/<title>([^<]+)<\/title>/i);
+      if (titleMatch && titleMatch[1]) {
+        effectiveLabel = titleMatch[1];
+      }
+    }
+
+    // Badge size
+    const padding = 10;
+    const iconSize = parseInt(size);
+    const fontSize = Math.round(iconSize * 0.6); 
+    const textPadding = Math.round(iconSize * 0.4); 
+    const radius = 0;
+    const approxCharWidth = fontSize * 0.6;
+    const textWidth = effectiveLabel.length * approxCharWidth;
+    
+    // Kinyerjük az ikon SVG-ből a width és height attribútumokat (ha vannak)
+    let iconViewBoxWidth = iconSize;
+    let iconViewBoxHeight = iconSize;
+    const widthMatch = iconSVG.match(/width="(\d+\.?\d*)"/);
+    const heightMatch = iconSVG.match(/height="(\d+\.?\d*)"/);
+    if (widthMatch) iconViewBoxWidth = parseFloat(widthMatch[1]);
+    if (heightMatch) iconViewBoxHeight = parseFloat(heightMatch[1]);
+
+    // Ikon doboz mérete
+    const iconBoxWidth = iconViewBoxWidth + 5;
+    const iconBoxHeight = iconViewBoxHeight + 5;
+
+    // Ha a color paraméter nincs megadva, próbáljuk kinyerni az ikon színét
+    let effectiveColor = color;
+    if (!req.query.color || req.query.color === '#000000') {
+      const match = iconSVG.match(/fill="([^"]+)"/);
+      if (match && match[1]) {
+        effectiveColor = match[1];
+      } else {
+        effectiveColor = "#222"; // fallback
+      }
+    }
+
+    // doboz magasság 5 pixellel nagyobb legyen az ikon méreténél
+    const iconSizeAndPadding = iconSize + 5;
+    const labelRectHeight = fontSize + padding;
+
+    let width, height, iconGroup, textElem;
+
+    const fontFamily = "Verdana,Geneva,DejaVu Sans,sans-serif";
+    const fontWeight = fontweight; // paraméterből
+
+    if (labelpos === 'left') {
+      // Külön dobozok: padding csak a széleken kell, a dobozokon belül nem!
+      textElem = `<rect x="0" y="0" width="${textWidth}" height="${iconBoxHeight}" rx="${radius}" fill="${bglabel}"/>
+        <text x="${textWidth / 2}" y="${iconBoxHeight / 2}" font-size="${fontSize}" font-family="${fontFamily}" font-weight="${fontWeight}" fill="${effectiveColor}" text-anchor="middle" dominant-baseline="middle">${effectiveLabel}</text>`;
+      iconGroup = `
+        <rect x="${textWidth}" y="0" width="${iconBoxWidth + 5}" height="${iconBoxHeight}" rx="${radius}" fill="${bgicon}"/>
+        <g transform="translate(${textWidth + (5 / 2)}, ${(iconBoxHeight - iconSize) / 2})">${iconSVG}</g>
+      `;
+    } else if (labelpos === 'above' || labelpos === 'below') {
+      // Felső vagy alsó label: ikon doboz magassága = iconSize + 5, szélessége = szöveg doboz szélessége
+      width = Math.max(iiconSizeAndPadding, textWidth);
+      
+      const iconRectY = labelpos === 'above'
+        ? labelRectHeight
+        : 0;
+      const labelRectY = labelpos === 'above'
+        ? 0
+        : iiconSizeAndPadding;
+      height = iconSizeAndPadding + textPadding + labelRectHeight;
+
+      // Label háttér
+      const labelRect = `<rect x="0" y="${labelRectY}" width="${width}" height="${labelRectHeight}" rx="${radius}" fill="${bglabel}"/>`;
+      // Ikon háttér
+      const iconRect = `<rect x="0" y="${iconRectY}" width="${width}" height="${iconSize + 5}" rx="${radius}" fill="${bgicon}"/>`;
+
+      // Szöveg
+      const textY = labelpos === 'above'
+        ? labelRectY + 5 + labelRectHeight / 2
+        : labelRectY + 5 + labelRectHeight / 2;
+      textElem = `
+        ${labelRect}
+        <text x="${width / 2}" y="${textY}" font-size="${fontSize}" font-family="${fontFamily}" font-weight="${fontWeight}" fill="${effectiveColor}" text-anchor="middle" dominant-baseline="middle">${effectiveLabel}</text>
+      `;
+
+      // Ikon
+      iconGroup = `
+        ${iconRect}
+        <g transform="translate(${(width - iconSize) / 2 + 2.5}, ${iconRectY + (iconSize + 5 - iconSize) / 2})">${iconSVG}</g>
+      `;
+    } else {
+      // Alapértelmezett: ikon balra, szöveg jobbra (függőleges közép)
+      iconGroup = `
+        <rect x="0" y="0" width="${iconBoxWidth}" height="${iconBoxHeight}" rx="${radius}" fill="${bgicon}"/>
+        <g transform="translate(${(iconBoxWidth - iconViewBoxWidth) / 2}, ${(iconBoxHeight - iconViewBoxHeight) / 2})">${iconSVG}</g>
+      `;
+      textElem = `<rect x="${iconBoxWidth}" y="0" width="${textWidth}" height="${iconBoxHeight}" rx="${radius}" fill="${bglabel}"/>
+        <text x="${iconBoxWidth + textWidth / 2}" y="${iconBoxHeight / 2}" font-size="${fontSize}" font-family="${fontFamily}" font-weight="${fontWeight}" fill="${effectiveColor}" text-anchor="middle" dominant-baseline="middle">${effectiveLabel}</text>`;
+    } 
+
+    // SVG badge string összefűzéssel, szöveg árnyékkal
+    const svg = `
+<svg xmlns="http://www.w3.org/2000/svg" width="${(labelpos === 'left' || labelpos === 'right') ? iconBoxWidth + textWidth : width}" height="${(labelpos === 'left' || labelpos === 'right') ? iconBoxHeight : labelRectHeight+iconSize + 5}" style="background:none">
+  <defs>
+    <filter id="shadow" x="-20%" y="-20%" width="140%" height="140%">
+      <feDropShadow dx="0" dy="1" stdDeviation="1" flood-color="#000" flood-opacity="0.25"/>
+    </filter>
+  </defs>
+  ${iconGroup}
+  ${textElem.replace('<text ', '<text filter="url(#shadow)" ')}
+</svg>
+    `.trim();
+
+    res.setHeader('Content-Type', 'image/svg+xml');
+    res.send(svg);
+  } catch (err) {
+    console.error(err);
+    res.status(500).send('Internal Server Error');
+  }
+});
+
+module.exports = router;

src/api/index.js

@@ -0,0 +1,8 @@
+const router = require('express').Router();
+const badgeRouter = require('./badge');
+const tagRouter = require('./tag');
+
+router.use(badgeRouter);
+router.use(tagRouter);
+
+module.exports = { router };

src/api/tag.js

@@ -0,0 +1,8 @@
+const router = require('express').Router();
+
+
+router.get('/tag', (req, res) => {
+	res.status(200).send('OK');
+});
+
+module.exports = router;

src/index.js

@@ -0,0 +1,16 @@
+const express = require('express');
+const helmet = require('helmet');
+const app = express();
+const PORT = process.env.PORT || 3000;
+
+const api = require('./api');
+
+app.use(helmet({
+    crossOriginResourcePolicy: false,
+  }));
+
+app.use('/', api.router);
+
+app.listen(PORT, () => {
+  console.log(`🚀 Badge API running at http://localhost:${PORT}/`);
+});