add pdf download and correct editor function

Author: martialziye

bun.lock

@@ -36,6 +36,7 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "form-data": "4.0.5",
+    "jspdf": "^3.0.4",
     "lucide-react": "^0.563.0",
     "next-themes": "^0.4.6",
     "react": "^19.1.1",

frontend/package.json

@@ -0,0 +1,76 @@
+function sanitizeFilename(input: string): string {
+  return input
+    .trim()
+    .replace(/[\\/:*?"<>|]+/g, "-")
+    .replace(/\s+/g, " ")
+    .slice(0, 80)
+}
+
+export async function downloadTextAsPdf(params: {
+  title: string
+  body: string
+  subtitle?: string
+}) {
+  const { jsPDF } = await import("jspdf")
+  const { title, body, subtitle } = params
+  const doc = new jsPDF({ unit: "pt", format: "a4" })
+
+  const marginX = 48
+  const marginTop = 56
+  const marginBottom = 48
+  const pageWidth = doc.internal.pageSize.getWidth()
+  const pageHeight = doc.internal.pageSize.getHeight()
+  const usableWidth = pageWidth - marginX * 2
+  const maxY = pageHeight - marginBottom
+
+  let y = marginTop
+
+  const ensureSpace = (height: number) => {
+    if (y + height <= maxY) {
+      return
+    }
+    doc.addPage()
+    y = marginTop
+  }
+
+  doc.setFont("helvetica", "bold")
+  doc.setFontSize(16)
+  ensureSpace(22)
+  doc.text(title || "Generation", marginX, y)
+  y += 24
+
+  if (subtitle) {
+    doc.setFont("helvetica", "normal")
+    doc.setFontSize(10)
+    doc.setTextColor(100)
+    ensureSpace(14)
+    doc.text(subtitle, marginX, y)
+    y += 20
+    doc.setTextColor(0)
+  }
+
+  doc.setFont("helvetica", "normal")
+  doc.setFontSize(11)
+
+  const paragraphs = body.split(/\r?\n/)
+  for (const paragraph of paragraphs) {
+    if (!paragraph.trim()) {
+      ensureSpace(12)
+      y += 12
+      continue
+    }
+
+    const lines = doc.splitTextToSize(paragraph, usableWidth) as string[]
+    for (const line of lines) {
+      ensureSpace(14)
+      doc.text(line, marginX, y)
+      y += 14
+    }
+    ensureSpace(6)
+    y += 6
+  }
+
+  const filenameBase =
+    sanitizeFilename(title || "generation-output") || "generation-output"
+  doc.save(`${filenameBase}.pdf`)
+}