Ajout de l'export SVG du QR code

app/app.js

@@ -26,6 +26,7 @@
   const logoClearBtn = document.getElementById("qr-logo-clear");
   const generateBtn = document.getElementById("generate-btn");
   const downloadBtn = document.getElementById("download-btn");
+  const downloadSvgBtn = document.getElementById("download-svg-btn");
   const canvas = document.getElementById("qr-canvas");
   const statusEl = document.getElementById("qr-status");
   const ctx = canvas.getContext("2d");
@@ -137,7 +138,7 @@
     el.addEventListener("input", render);
   });
 
-  function render() {
+  function getPayload() {
     const mode = modeEl.value;
     let text;
     if (mode === "wifi") {
@@ -147,6 +148,11 @@
     } else {
       text = textEl.value;
     }
+    return { mode, text };
+  }
+
+  function render() {
+    const { mode, text } = getPayload();
     statusEl.classList.remove("error");
 
     if (!text) {
@@ -229,12 +235,84 @@
     }, "image/png");
   }
 
+  function triggerDownload(filename, content, mimeType) {
+    const blob = new Blob([content], { type: mimeType });
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement("a");
+    a.href = url;
+    a.download = filename;
+    document.body.appendChild(a);
+    a.click();
+    document.body.removeChild(a);
+    URL.revokeObjectURL(url);
+  }
+
+  function downloadSvg() {
+    const { mode, text } = getPayload();
+    if (!text) {
+      alert("Générez d'abord un QR code avant de l'exporter.");
+      return;
+    }
+
+    const cellSize = parseInt(cellSizeEl.value, 10) || 8;
+    const requestedLevel = correctionEl.value;
+    const level = logoImage ? "H" : requestedLevel;
+    const fgColor = fgColorEl.value || "#000000";
+    const bgColor = bgColorEl.value || "#ffffff";
+    const margin = 4; // modules
+
+    try {
+      const qr = qrcode(0, level);
+      qr.addData(text);
+      qr.make();
+
+      const moduleCount = qr.getModuleCount();
+      const size = (moduleCount + margin * 2) * cellSize;
+
+      const parts = [];
+      parts.push(
+        `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 ${size} ${size}" width="${size}" height="${size}" shape-rendering="crispEdges">`
+      );
+      parts.push(`<rect x="0" y="0" width="${size}" height="${size}" fill="${bgColor}" />`);
+
+      for (let row = 0; row < moduleCount; row++) {
+        for (let col = 0; col < moduleCount; col++) {
+          if (qr.isDark(row, col)) {
+            const x = (col + margin) * cellSize;
+            const y = (row + margin) * cellSize;
+            parts.push(`<rect x="${x}" y="${y}" width="${cellSize}" height="${cellSize}" fill="${fgColor}" />`);
+          }
+        }
+      }
+
+      if (logoImage) {
+        const logoSize = size * 0.22;
+        const pad = logoSize * 0.14;
+        const x = (size - logoSize) / 2;
+        const y = (size - logoSize) / 2;
+
+        parts.push(
+          `<rect x="${x - pad}" y="${y - pad}" width="${logoSize + pad * 2}" height="${logoSize + pad * 2}" fill="${bgColor}" />`
+        );
+        parts.push(
+          `<image href="${logoImage.src}" x="${x}" y="${y}" width="${logoSize}" height="${logoSize}" preserveAspectRatio="xMidYMid slice" />`
+        );
+      }
+
+      parts.push("</svg>");
+      triggerDownload("qrcode.svg", parts.join(""), "image/svg+xml");
+    } catch (err) {
+      alert("Erreur : " + (err.message || "contenu trop long pour être encodé."));
+    }
+  }
+
   [textEl, cellSizeEl, correctionEl, fgColorEl, bgColorEl].forEach((el) => {
     el.addEventListener("input", render);
   });
 
   generateBtn.addEventListener("click", render);
   downloadBtn.addEventListener("click", downloadPng);
+  downloadSvgBtn.addEventListener("click", downloadSvg);
 
   updateModeVisibility();
   render();