From f7f2987f86251862fb0db00902b959f4774593db Mon Sep 17 00:00:00 2001
From: Daneel <daneel@sukany.cz>
Date: Fri, 20 Feb 2026 18:38:34 +0100
Subject: [PATCH] feat: v4.4.0 - export filename:
 <slug_nazvu>-<YYYYMMDD-HHMM>.{json,pdf}

---
 app/config.py           |  2 +-
 app/static/index.html   |  2 +-
 app/static/js/app.js    | 22 +++++++++++++++++++++-
 app/static/js/export.js |  2 +-
 4 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/app/config.py b/app/config.py
index 3411edb..a8413ab 100644
--- a/app/config.py
+++ b/app/config.py
@@ -1,5 +1,5 @@
 """Application configuration."""
 
-VERSION = "4.3.0"
+VERSION = "4.4.0"
 MAX_FILE_SIZE_MB = 10
 DEFAULT_COLOR = "#ffffff"
diff --git a/app/static/index.html b/app/static/index.html
index 207634d..74b2676 100644
--- a/app/static/index.html
+++ b/app/static/index.html
@@ -13,7 +13,7 @@
     <header class="header">
         <div class="header-left">
             <h1 class="header-title">Scénář Creator</h1>
-            <span class="header-version">v4.3</span>
+            <span class="header-version">v4.4</span>
         </div>
         <div class="header-actions">
             <label class="btn btn-secondary btn-sm" id="importJsonBtn">
diff --git a/app/static/js/app.js b/app/static/js/app.js
index e72c0ea..863958b 100644
--- a/app/static/js/app.js
+++ b/app/static/js/app.js
@@ -21,6 +21,26 @@ const App = {
         return 'b_' + Math.random().toString(36).slice(2, 10);
     },
 
+    // Build download filename: "<slug_nazvu>-<YYYYMMDD-HHMM>.<ext>"
+    buildFilename(ext) {
+        const title = (this.state.event.title || 'scenar').trim();
+        // Remove diacritics, lowercase, replace non-alphanum with dash, collapse dashes
+        const slug = title
+            .normalize('NFD')
+            .replace(/[\u0300-\u036f]/g, '')
+            .toLowerCase()
+            .replace(/[^a-z0-9]+/g, '-')
+            .replace(/^-+|-+$/g, '') || 'scenar';
+        const now = new Date();
+        const ts = now.getFullYear().toString()
+            + String(now.getMonth() + 1).padStart(2, '0')
+            + String(now.getDate()).padStart(2, '0')
+            + '-'
+            + String(now.getHours()).padStart(2, '0')
+            + String(now.getMinutes()).padStart(2, '0');
+        return `${slug}-${ts}.${ext}`;
+    },
+
     parseTimeToMin(str) {
         if (!str) return 0;
         const [h, m] = str.split(':').map(Number);
@@ -440,7 +460,7 @@ const App = {
             try {
                 this.toast('Generuji PDF…', 'success');
                 const blob = await API.postBlob('/api/generate-pdf', doc);
-                API.downloadBlob(blob, 'scenar.pdf');
+                API.downloadBlob(blob, App.buildFilename('pdf'));
                 this.toast('PDF staženo', 'success');
             } catch (err) {
                 this.toast('Chyba PDF: ' + err.message, 'error');
diff --git a/app/static/js/export.js b/app/static/js/export.js
index 2fc20a2..7309773 100644
--- a/app/static/js/export.js
+++ b/app/static/js/export.js
@@ -10,7 +10,7 @@ function exportJson() {
     }
     const json = JSON.stringify(doc, null, 2);
     const blob = new Blob([json], { type: 'application/json' });
-    API.downloadBlob(blob, 'scenar_export.json');
+    API.downloadBlob(blob, App.buildFilename('json'));
     App.toast('JSON exportován', 'success');
 }