Make the progress bar draggable to seek to a position

The seek slider was display-only; enable it as a scrubber. Adds absolute-seek
in the backend (PlayerStateManager.seek_to via Kodi Player.Seek with an absolute
time) and the /api/control/seekto route. The slider sends the seek on release;
the poll loop stops overwriting the slider while dragging and for a short window
after a seek so it doesn't snap back before Kodi reports the new position.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

mediapi/player.py

@@ -219,6 +219,23 @@ class PlayerStateManager:
             # Kodi takes a relative jump as value={"seconds": N}.
             self._kodi.call("Player.Seek", playerid=pid, value={"seconds": int(offset_seconds)})
 
+    def seek_to(self, position_seconds):
+        """Seek to an absolute position (seconds from the start) -- used by the
+        draggable progress bar."""
+        pid = self._active_player_id()
+        if pid is not None:
+            pos = max(0, int(position_seconds))
+            self._kodi.call(
+                "Player.Seek",
+                playerid=pid,
+                value={"time": {
+                    "hours": pos // 3600,
+                    "minutes": (pos % 3600) // 60,
+                    "seconds": pos % 60,
+                    "milliseconds": 0,
+                }},
+            )
+
     def set_volume(self, value):
         value = max(0, min(100, value))
         self._kodi.call("Application.SetVolume", volume=value)

mediapi/routes/api_routes.py

@@ -90,6 +90,21 @@ def seek():
     return jsonify({"ok": True})
 
 
+@bp.route("/control/seekto", methods=["POST"])
+def seekto():
+    body = request.get_json(force=True, silent=True) or {}
+    try:
+        position = float(body.get("position"))
+    except (TypeError, ValueError):
+        return jsonify({"error": "expected {position: seconds}"}), 400
+
+    try:
+        current_app.player.seek_to(position)
+    except KodiError as exc:
+        return jsonify({"error": f"player unavailable: {exc}"}), 503
+    return jsonify({"ok": True})
+
+
 @bp.route("/control/volume", methods=["POST"])
 def volume():
     body = request.get_json(force=True, silent=True) or {}

mediapi/static/js/app.js

@@ -3,6 +3,8 @@
 
   let currentPath = null; // null = top-level media roots
   let volumeDebounce = null;
+  let seeking = false; // user is dragging the progress bar
+  let seekSuppressUntil = 0; // ignore poll updates briefly after a seek
 
   const el = (id) => document.getElementById(id);
 
@@ -102,12 +104,16 @@
       if (!online) return;
 
       el("now-playing").textContent = data.filename || "—";
-      el("time-pos").textContent = formatTime(data.position);
       el("time-dur").textContent = formatTime(data.duration);
 
       const slider = el("seek-slider");
       slider.max = data.duration || 0;
-      slider.value = data.position || 0;
+      // Don't fight the user while they're dragging, or right after a seek
+      // (Kodi takes a beat to report the new position).
+      if (!seeking && Date.now() > seekSuppressUntil) {
+        slider.value = data.position || 0;
+        el("time-pos").textContent = formatTime(data.position);
+      }
 
       if (document.activeElement !== el("volume-slider")) {
         el("volume-slider").value = data.volume || 0;
@@ -136,6 +142,20 @@
     api("/api/control/seek", { method: "POST", body: JSON.stringify({ offset: 30 }) });
   });
 
+  // Drag the progress bar to seek. 'input' fires while dragging (live label),
+  // 'change' fires on release (send the absolute seek).
+  el("seek-slider").addEventListener("input", (e) => {
+    seeking = true;
+    el("time-pos").textContent = formatTime(Number(e.target.value));
+  });
+
+  el("seek-slider").addEventListener("change", (e) => {
+    const pos = Number(e.target.value);
+    seeking = false;
+    seekSuppressUntil = Date.now() + 1200;
+    api("/api/control/seekto", { method: "POST", body: JSON.stringify({ position: pos }) });
+  });
+
   el("volume-slider").addEventListener("input", (e) => {
     clearTimeout(volumeDebounce);
     const value = e.target.value;

mediapi/templates/index.html

@@ -27,7 +27,7 @@
         <p id="now-playing" class="filename">&mdash;</p>
         <div class="progress-row">
           <span id="time-pos">0:00</span>
-          <input id="seek-slider" type="range" min="0" max="0" step="1" disabled>
+          <input id="seek-slider" type="range" min="0" max="0" step="1">
           <span id="time-dur">0:00</span>
         </div>
         <div class="transport-row">