Admin: add title field, live preview, and delete; DB migration for title; show title in list; keep Admin button on public pages

app.py

@@ -53,11 +53,19 @@ def create_app():
             CREATE TABLE IF NOT EXISTS pages (
                 id INTEGER PRIMARY KEY AUTOINCREMENT,
                 uuid TEXT NOT NULL UNIQUE,
+                title TEXT NOT NULL DEFAULT '',
                 html TEXT NOT NULL,
                 created_at TEXT NOT NULL
             );
             """
         )
+        # Migration: add 'title' column for older DB versions
+        try:
+            cols = {row[1] for row in db.execute("PRAGMA table_info(pages)").fetchall()}
+            if "title" not in cols:
+                db.execute("ALTER TABLE pages ADD COLUMN title TEXT NOT NULL DEFAULT ''")
+        except Exception:
+            pass
         db.commit()
 
     @app.before_request
@@ -120,29 +128,42 @@ def create_app():
         login_required()
         db = get_db()
         if request.method == "POST":
+            title = request.form.get("title", "").strip()
             html = request.form.get("html", "").strip()
             if not html:
                 flash("HTML не может быть пустым.", "error")
             else:
                 uid = uuid_lib.uuid4().hex
                 db.execute(
-                    "INSERT INTO pages (uuid, html, created_at) VALUES (?, ?, ?)",
-                    (uid, html, datetime.utcnow().isoformat(timespec="seconds")),
+                    "INSERT INTO pages (uuid, title, html, created_at) VALUES (?, ?, ?, ?)",
+                    (uid, title, html, datetime.utcnow().isoformat(timespec="seconds")),
                 )
                 db.commit()
                 flash("Страница опубликована.", "success")
                 return redirect(url_for("admin"))
 
         pages = db.execute(
-            "SELECT id, uuid, created_at FROM pages ORDER BY id DESC"
+            "SELECT id, uuid, title, created_at FROM pages ORDER BY id DESC"
         ).fetchall()
         base_url = request.host_url.rstrip("/")
         return render_template("admin.html", pages=pages, base_url=base_url)
 
+    @app.route("/admin/delete/<int:pid>", methods=["POST"])
+    def admin_delete(pid: int):
+        login_required()
+        db = get_db()
+        cur = db.execute("DELETE FROM pages WHERE id = ?", (pid,))
+        db.commit()
+        if cur.rowcount:
+            flash("Страница удалена.", "success")
+        else:
+            flash("Страница не найдена.", "error")
+        return redirect(url_for("admin"))
+
     @app.route("/p/<string:uid>")
     def view_page(uid: str):
         db = get_db()
-        row = db.execute("SELECT html FROM pages WHERE uuid = ?", (uid,)).fetchone()
+        row = db.execute("SELECT html, title FROM pages WHERE uuid = ?", (uid,)).fetchone()
         if row is None:
             abort(404)
         # Show a floating admin button for authenticated users, otherwise serve raw HTML

templates/admin.html

@@ -3,6 +3,10 @@
   <h1>Публикация HTML-страниц</h1>
 
   <form method="post">
+    <div class="row">
+      <label for="title">Название страницы</label>
+      <input type="text" id="title" name="title" placeholder="Например: Презентация" />
+    </div>
     <div class="row">
       <label for="html">HTML-код</label>
       <textarea id="html" name="html" placeholder="<h1>Заголовок</h1>\n<p>Мой контент...</p>" required></textarea>
@@ -11,24 +15,37 @@
     <span class="muted">После публикации создаётся ссылка с UUID.</span>
   </form>
 
+  <div class="row" style="margin-top: 1.25rem;">
+    <div class="muted" style="margin-bottom: .5rem;">Моментальный предпросмотр</div>
+    <iframe id="preview" style="width:100%; height:320px; border:1px solid rgba(255,255,255,.08); border-radius:12px; background:#fff;"></iframe>
+  </div>
+
   <h2 style="margin-top:2rem;">Опубликованные страницы</h2>
   {% if pages %}
     <table>
       <thead>
         <tr>
           <th>ID</th>
+          <th>Название</th>
           <th>UUID</th>
           <th>Ссылка</th>
           <th>Создано</th>
+          <th>Действия</th>
         </tr>
       </thead>
       <tbody>
         {% for p in pages %}
           <tr>
             <td>{{ p.id }}</td>
+            <td>{{ p.title or "" }}</td>
             <td><code>{{ p.uuid }}</code></td>
             <td><a href="{{ base_url }}/p/{{ p.uuid }}" target="_blank">{{ base_url }}/p/{{ p.uuid }}</a></td>
             <td>{{ p.created_at }}</td>
+            <td>
+              <form method="post" action="{{ url_for('admin_delete', pid=p.id) }}" onsubmit="return confirm('Удалить страницу #' + {{ p.id }} + '?');">
+                <button class="btn secondary" type="submit">Удалить</button>
+              </form>
+            </td>
           </tr>
         {% endfor %}
       </tbody>
@@ -36,5 +53,24 @@
   {% else %}
     <p class="muted">Страниц пока нет.</p>
   {% endif %}
+  <script>
+    (function(){
+      const htmlEl = document.getElementById('html');
+      const titleEl = document.getElementById('title');
+      const iframe = document.getElementById('preview');
+      function render(){
+        if(!iframe || !htmlEl) return;
+        const doc = iframe.contentDocument || iframe.contentWindow.document;
+        const t = (titleEl && titleEl.value) ? `<title>${titleEl.value}</title>` : '';
+        doc.open();
+        doc.write(`<!doctype html><html lang="ru"><head><meta charset="utf-8">${t}</head><body>${htmlEl.value}</body></html>`);
+        doc.close();
+      }
+      if (htmlEl){
+        htmlEl.addEventListener('input', render);
+        if (titleEl) titleEl.addEventListener('input', render);
+        render();
+      }
+    })();
+  </script>
 {% endblock %}
-