add csv export

handlers/app/export_bitwarden.go

@@ -1,6 +1,7 @@
 package app
 
 import (
+	"bytes"
 	"encoding/json"
 	"maxwarden/entries"
 	"maxwarden/middleware"
@@ -22,8 +23,12 @@ func ExportBitwardenHandler(w http.ResponseWriter, r *http.Request) {
 	renderView := func(errorMessage string) {
 		AppLayout("Export Vault", *identity, session,
 			Card(
-				Heading("Bitwarden JSON export"),
-				P(Text("Download your MaxWarden vault as a plaintext JSON file that can be imported into Bitwarden.")),
+				Heading("Bitwarden export"),
+				P(Text("Download your MaxWarden vault in one of Bitwarden's native import formats.")),
+				P(
+					InlineStyle("$me { margin-top: $3; }"),
+					Text("In Bitwarden, choose the File format that exactly matches the download: Bitwarden (csv) or Bitwarden (json). CSV is recommended if Bitwarden reports a generic JSON import error."),
+				),
 				P(
 					InlineStyle("$me { margin-top: $3; color: $color(red-700); font-weight: var(--font-weight-semibold); }"),
 					Text("Warning: the downloaded file contains all usernames and passwords in plaintext. Store it securely and delete it when you are finished."),
@@ -46,7 +51,11 @@ func ExportBitwardenHandler(w http.ResponseWriter, r *http.Request) {
 						Required(),
 					),
 					Br(),
-					ButtonUIDanger(Type("submit"), Text("Download plaintext export")),
+					Div(
+						InlineStyle("$me { display: flex; flex-wrap: wrap; gap: $3; margin-top: $3; }"),
+						ButtonUIDanger(Type("submit"), Name("format"), Value("csv"), Text("Download Bitwarden CSV (recommended)")),
+						ButtonUIOutline(Type("submit"), Name("format"), Value("json"), Text("Download Bitwarden JSON")),
+					),
 				),
 			),
 		).Render(w)
@@ -92,16 +101,38 @@ func ExportBitwardenHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	document, err := json.MarshalIndent(entries.NewBitwardenExport(secretList), "", "  ")
-	if err != nil {
-		http.Error(w, "Unable to create export", http.StatusInternalServerError)
+	format := r.Form.Get("format")
+	var document []byte
+	var extension string
+	var contentType string
+
+	switch format {
+	case "", "csv":
+		var csvDocument bytes.Buffer
+		if err := entries.WriteBitwardenCSV(&csvDocument, secretList); err != nil {
+			http.Error(w, "Unable to create export", http.StatusInternalServerError)
+			return
+		}
+		document = csvDocument.Bytes()
+		extension = "csv"
+		contentType = "text/csv; charset=utf-8"
+	case "json":
+		document, err = json.MarshalIndent(entries.NewBitwardenExport(secretList), "", "  ")
+		if err != nil {
+			http.Error(w, "Unable to create export", http.StatusInternalServerError)
+			return
+		}
+		extension = "json"
+		contentType = "application/json; charset=utf-8"
+	default:
+		http.Error(w, "Unsupported export format", http.StatusBadRequest)
 		return
 	}
 
-	filename := "maxwarden-bitwarden-export-" + time.Now().UTC().Format("2006-01-02") + ".json"
+	filename := "maxwarden-bitwarden-export-" + time.Now().UTC().Format("2006-01-02") + "." + extension
 	w.Header().Set("Cache-Control", "no-store")
 	w.Header().Set("Content-Disposition", `attachment; filename="`+filename+`"`)
-	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	w.Header().Set("Content-Type", contentType)
 	w.Header().Set("Pragma", "no-cache")
 	w.Header().Set("X-Content-Type-Options", "nosniff")
 	w.Write(document)