Add CSV file upload and auto-delimiter detection for pilot import

Allows uploading a CSV file directly instead of only pasting text, and
auto-detects comma vs semicolon separators to support more locales.

pilots.go

@@ -164,6 +164,18 @@ func handleDeletePilot(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusNoContent)
 }
 
+// detectSeparator counts commas vs semicolons in the first line to pick the delimiter.
+func detectSeparator(data []byte) rune {
+	sample := string(data)
+	if idx := strings.IndexByte(sample, '\n'); idx > 0 {
+		sample = sample[:idx]
+	}
+	if strings.Count(sample, ";") > strings.Count(sample, ",") {
+		return ';'
+	}
+	return ','
+}
+
 func handleImportPilots(w http.ResponseWriter, r *http.Request) {
 	id, err := strconv.ParseInt(r.PathValue("id"), 10, 64)
 	if err != nil {
@@ -174,13 +186,34 @@ func handleImportPilots(w http.ResponseWriter, r *http.Request) {
 		writeError(w, http.StatusForbidden, "forbidden")
 		return
 	}
-	// Cap the upload to keep memory bounded.
-	body, err := io.ReadAll(io.LimitReader(r.Body, 2*1024*1024))
+
+	var body []byte
+	if strings.HasPrefix(r.Header.Get("Content-Type"), "multipart/form-data") {
+		if err := r.ParseMultipartForm(2 * 1024 * 1024); err != nil {
+			writeError(w, http.StatusBadRequest, "read_error")
+			return
+		}
+		f, _, err := r.FormFile("file")
+		if err != nil {
+			writeError(w, http.StatusBadRequest, "missing_file")
+			return
+		}
+		defer f.Close()
+		body, err = io.ReadAll(io.LimitReader(f, 2*1024*1024))
 		if err != nil {
 			writeError(w, http.StatusBadRequest, "read_error")
 			return
 		}
+	} else {
+		body, err = io.ReadAll(io.LimitReader(r.Body, 2*1024*1024))
+		if err != nil {
+			writeError(w, http.StatusBadRequest, "read_error")
+			return
+		}
+	}
+
 	reader := csv.NewReader(strings.NewReader(string(body)))
+	reader.Comma = detectSeparator(body)
 	reader.FieldsPerRecord = -1
 	records, err := reader.ReadAll()
 	if err != nil {

web/api.js

@@ -48,11 +48,20 @@ const API = {
   createPilot: (id, b) => api("POST", `/api/competitions/${id}/pilots`, b),
   updatePilot: (id, pid, b) => api("PATCH", `/api/competitions/${id}/pilots/${pid}`, b),
   deletePilot: (id, pid) => api("DELETE", `/api/competitions/${id}/pilots/${pid}`),
-  importPilots: async (id, csv) => {
+  importPilots: async (id, data) => {
+    let body, headers = {};
+    if (data instanceof File) {
+      const form = new FormData();
+      form.append("file", data);
+      body = form;
+    } else {
+      headers["Content-Type"] = "text/csv";
+      body = data;
+    }
     const res = await fetch(apiURL(`/api/competitions/${id}/pilots/import`), {
       method: "POST",
-      headers: { "Content-Type": "text/csv" },
-      body: csv,
+      headers,
+      body,
       credentials: "include",
     });
     if (!res.ok) throw new Error("import_failed");

web/competition.js

@@ -953,15 +953,33 @@
   function openImportModal() {
     const backdrop = el("div", { class: "modal-backdrop",
       onclick: (e) => { if (e.target === backdrop) backdrop.remove(); } });
+    let selectedFile = null;
+    const fileNameSpan = el("span", { class: "muted small", style: { marginLeft: "0.5rem" } }, "");
+    const fileInput = el("input", { type: "file", accept: ".csv,text/csv", style: { display: "none" },
+      onchange: (e) => {
+        selectedFile = e.target.files[0] || null;
+        fileNameSpan.textContent = selectedFile ? selectedFile.name : "";
+      },
+    });
     const textarea = el("textarea", { placeholder: t("csv_paste"), style: { width: "100%", minHeight: "180px" } });
     backdrop.appendChild(el("div", { class: "modal" },
       el("h3", null, t("import_csv")),
+      el("p", { class: "muted small", style: { marginBottom: "0.5rem" } }, t("csv_separator_hint")),
+      el("div", { style: { marginBottom: "0.75rem", display: "flex", alignItems: "center" } },
+        fileInput,
+        el("button", { onclick: () => fileInput.click() }, t("upload_file")),
+        fileNameSpan,
+      ),
       textarea,
       el("div", { class: "row", style: { justifyContent: "flex-end", marginTop: "1rem" } },
         el("button", { onclick: () => backdrop.remove() }, t("cancel")),
         el("button", { class: "primary", onclick: async () => {
           try {
-            await API.importPilots(competitionId, textarea.value);
+            const data = selectedFile || textarea.value;
+            if (!data || (typeof data === "string" && !data.trim())) {
+              alert(t("csv_empty")); return;
+            }
+            await API.importPilots(competitionId, data);
             await loadPilots();
             backdrop.remove();
             render();

web/i18n/de.json

@@ -142,5 +142,8 @@
   "confirm_delete_competition": "Diesen Wettbewerb löschen? Alle Piloten, Strafen und Mitglieder werden unwiderruflich entfernt.",
   "confirm_delete_competition_named": "Wettbewerb '{name}' löschen? Alle Piloten, Strafen und Mitglieder werden unwiderruflich entfernt.",
   "backup_written": "Sicherung erstellt: {file}",
-  "competition_closed": "Wettbewerb ist beendet"
+  "competition_closed": "Wettbewerb ist beendet",
+  "upload_file": "Datei hochladen",
+  "csv_separator_hint": "Komma (,) und Semikolon (;) werden automatisch erkannt.",
+  "csv_empty": "Bitte CSV einfügen oder eine Datei wählen."
 }

web/i18n/en.json

@@ -142,5 +142,8 @@
   "confirm_delete_competition": "Delete this competition? All pilots, penalties and members will be permanently removed.",
   "confirm_delete_competition_named": "Delete competition '{name}'? All pilots, penalties and members will be permanently removed.",
   "backup_written": "Backup written: {file}",
-  "competition_closed": "Competition is closed"
+  "competition_closed": "Competition is closed",
+  "upload_file": "Upload file",
+  "csv_separator_hint": "Comma (,) and semicolon (;) are detected automatically.",
+  "csv_empty": "Please paste CSV or choose a file."
 }

web/i18n/es.json

@@ -79,5 +79,8 @@
   "save_settings": "Guardar ajustes",
   "saved": "Guardado",
   "yes": "Sí",
-  "no": "No"
+  "no": "No",
+  "upload_file": "Subir archivo",
+  "csv_separator_hint": "La coma (,) y el punto y coma (;) se detectan automáticamente.",
+  "csv_empty": "Por favor, pegue CSV o elija un archivo."
 }

web/i18n/fr.json

@@ -79,5 +79,8 @@
   "save_settings": "Enregistrer",
   "saved": "Enregistré",
   "yes": "Oui",
-  "no": "Non"
+  "no": "Non",
+  "upload_file": "Téléverser un fichier",
+  "csv_separator_hint": "La virgule (,) et le point-virgule (;) sont détectés automatiquement.",
+  "csv_empty": "Veuillez coller du CSV ou choisir un fichier."
 }

web/i18n/pl.json

@@ -79,5 +79,8 @@
   "save_settings": "Zapisz ustawienia",
   "saved": "Zapisano",
   "yes": "Tak",
-  "no": "Nie"
+  "no": "Nie",
+  "upload_file": "Prześlij plik",
+  "csv_separator_hint": "Przecinek (,) i średnik (;) są wykrywane automatycznie.",
+  "csv_empty": "Wklej CSV lub wybierz plik."
 }

web/i18n/pt.json

@@ -79,5 +79,8 @@
   "save_settings": "Guardar definições",
   "saved": "Guardado",
   "yes": "Sim",
-  "no": "Não"
+  "no": "Não",
+  "upload_file": "Carregar ficheiro",
+  "csv_separator_hint": "A vírgula (,) e o ponto e vírgula (;) são detectados automaticamente.",
+  "csv_empty": "Por favor, cole CSV ou escolha um ficheiro."
 }

web/i18n/ru.json

@@ -79,5 +79,8 @@
   "save_settings": "Сохранить настройки",
   "saved": "Сохранено",
   "yes": "Да",
-  "no": "Нет"
+  "no": "Нет",
+  "upload_file": "Загрузить файл",
+  "csv_separator_hint": "Запятая (,) и точка с запятой (;) определяются автоматически.",
+  "csv_empty": "Вставьте CSV или выберите файл."
 }