feat: Add play/pause feature

.gitignore

@@ -5,4 +5,5 @@ dist/
 .env
 *.log
 
-torrents/*
+torrents/*
+idea/

src/api/SeederRegistry.ts

@@ -65,6 +65,20 @@ export class SeederRegistry {
     return seeder.getState();
   }
 
+  async pauseTorrent(infoHashHex: string): Promise<boolean> {
+    const entry = this.seeders.get(infoHashHex);
+    if (!entry) return false;
+    await entry.seeder.pause();
+    return true;
+  }
+
+  async resumeTorrent(infoHashHex: string): Promise<boolean> {
+    const entry = this.seeders.get(infoHashHex);
+    if (!entry) return false;
+    await entry.seeder.resume();
+    return true;
+  }
+
   async removeTorrent(infoHashHex: string): Promise<boolean> {
     const entry = this.seeders.get(infoHashHex);
     if (!entry) return false;

src/api/routes/torrents.ts

@@ -46,6 +46,22 @@ export function torrentsRouter(registry: SeederRegistry) {
     });
   });
 
+  /** Pause a torrent — sends 'stopped' to trackers and halts the announce loop */
+  app.post("/:hash/pause", async (c) => {
+    const { hash } = c.req.param();
+    const ok = await registry.pauseTorrent(hash);
+    if (!ok) return res.notFound(c);
+    return c.json({ ok: true });
+  });
+
+  /** Resume a paused torrent — re-announces as 'started' and restarts the loop */
+  app.post("/:hash/resume", async (c) => {
+    const { hash } = c.req.param();
+    const ok = await registry.resumeTorrent(hash);
+    if (!ok) return res.notFound(c);
+    return c.json({ ok: true });
+  });
+
   /** Remove a torrent — sends 'stopped' to trackers then removes it */
   app.delete("/:hash", async (c) => {
     const { hash } = c.req.param();

src/core/seeder/FakeSeeder.ts

@@ -8,7 +8,7 @@ import type { TrackerResponse } from "../tracker/TrackerResponse.js";
 import { UdpTracker } from "../tracker/UdpTracker.js";
 import { SpeedSimulator } from "./SpeedSimulator.js";
 
-export type SeederStatus = "idle" | "running" | "stopping" | "stopped" | "error";
+export type SeederStatus = "idle" | "running" | "paused" | "stopping" | "stopped" | "error";
 
 export interface SeederState {
   infoHashHex: string;
@@ -118,9 +118,8 @@ export class FakeSeeder extends EventEmitter {
     this.scheduleNextAnnounce();
   }
 
-  async stop(): Promise<void> {
-    if (this.status === "stopped" || this.status === "stopping") return;
-    this.setStatus("stopping");
+  async pause(): Promise<void> {
+    if (this.status !== "running") return;
 
     if (this.announceTimer) {
       clearTimeout(this.announceTimer);
@@ -131,7 +130,7 @@ export class FakeSeeder extends EventEmitter {
       this.tickTimer = null;
     }
 
-    // Best-effort stopped announce to all trackers
+    // Notify trackers we're leaving the swarm (best-effort)
     await Promise.allSettled(
       this.trackers.map((t) =>
         t.stop({
@@ -147,6 +146,60 @@ export class FakeSeeder extends EventEmitter {
       )
     );
 
+    this.setStatus("paused");
+  }
+
+  async resume(): Promise<void> {
+    if (this.status !== "paused") return;
+    this.setStatus("running");
+
+    // Restart speed tick
+    this.lastTickTime = Date.now();
+    this.tickTimer = setInterval(() => {
+      const now = Date.now();
+      const delta = now - this.lastTickTime;
+      this.lastTickTime = now;
+      this.uploaded += this.speedSim.tick(delta);
+      this.emit("stateChange", this.getState());
+    }, 5_000);
+
+    // Re-announce as started then resume loop
+    await this.doAnnounce("started");
+    this.scheduleNextAnnounce();
+  }
+
+  async stop(): Promise<void> {
+    if (this.status === "stopped" || this.status === "stopping") return;
+    const waspaused = this.status === "paused";
+    this.setStatus("stopping");
+
+    if (this.announceTimer) {
+      clearTimeout(this.announceTimer);
+      this.announceTimer = null;
+    }
+    if (this.tickTimer) {
+      clearInterval(this.tickTimer);
+      this.tickTimer = null;
+    }
+
+    // If already paused, trackers were already notified — skip the stopped announce
+    if (!waspaused) {
+      await Promise.allSettled(
+        this.trackers.map((t) =>
+          t.stop({
+            infoHash: this.torrent.infoHash,
+            peerId: this.profile.peerId,
+            port: this.config.announcePort,
+            uploaded: this.uploaded,
+            downloaded: this.downloaded,
+            left: this.left,
+            userAgent: this.profile.userAgent,
+            key: this.profile.key,
+          })
+        )
+      );
+    }
+
     this.setStatus("stopped");
     this.emit("stopped");
   }

ui/src/components/ConfigModal.svelte

@@ -65,9 +65,8 @@
 
 <svelte:window on:keydown={onKeydown} />
 
-<!-- svelte-ignore a11y-click-events-have-key-events -->
-<div class="backdrop" on:click={onBackdrop} role="dialog" aria-modal="true" aria-label="Settings">
-  <div class="modal">
+<div class="backdrop" on:click={onBackdrop} role="presentation">
+  <dialog open aria-label="Settings">
     <header>
       <h2>Settings</h2>
       <button class="close" on:click={() => dispatch("close")} aria-label="Close">✕</button>
@@ -150,7 +149,7 @@
 
       </form>
     {/if}
-  </div>
+  </dialog>
 </div>
 
 <style>
@@ -164,7 +163,7 @@
     z-index: 100;
   }
 
-  .modal {
+  dialog {
     background: #1a1a2e;
     border: 1px solid #2a2a4a;
     border-radius: 10px;
@@ -172,6 +171,8 @@
     max-width: 420px;
     padding: 1.5rem;
     box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
+    color: inherit;
+    margin: 0;
   }
 
   header {

ui/src/components/TorrentList.svelte

@@ -1,11 +1,11 @@
 <script lang="ts">
-  import { formatBytes } from "../lib/api.js";
-  import { removeTorrent } from "../lib/api.js";
+  import { formatBytes, removeTorrent, pauseTorrent, resumeTorrent } from "../lib/api.js";
   import type { TorrentState } from "../lib/api.js";
 
   export let torrents: TorrentState[] = [];
 
   let removing = new Set<string>();
+  let toggling = new Set<string>();
 
   async function handleRemove(hash: string) {
     removing = new Set([...removing, hash]);
@@ -18,9 +18,24 @@
     }
   }
 
+  async function handleTogglePause(t: TorrentState) {
+    toggling = new Set([...toggling, t.infoHashHex]);
+    try {
+      if (t.status === "running") {
+        await pauseTorrent(t.infoHashHex);
+      } else if (t.status === "paused") {
+        await resumeTorrent(t.infoHashHex);
+      }
+    } finally {
+      toggling.delete(t.infoHashHex);
+      toggling = toggling;
+    }
+  }
+
   function statusColor(status: TorrentState["status"]): string {
     switch (status) {
       case "running":  return "#4ade80";
+      case "paused":   return "#60a5fa";
       case "stopping": return "#facc15";
       case "stopped":  return "#94a3b8";
       case "error":    return "#f87171";
@@ -62,7 +77,18 @@
           <td class="time">
             {t.lastAnnounce ? new Date(t.lastAnnounce).toLocaleTimeString() : "—"}
           </td>
-          <td>
+          <td class="actions">
+            {#if t.status === "running" || t.status === "paused"}
+              <button
+                class:pause={t.status === "running"}
+                class:resume={t.status === "paused"}
+                disabled={toggling.has(t.infoHashHex)}
+                on:click={() => handleTogglePause(t)}
+                title={t.status === "running" ? "Pause" : "Resume"}
+              >
+                {toggling.has(t.infoHashHex) ? "…" : t.status === "running" ? "⏸" : "▶"}
+              </button>
+            {/if}
             <button
               class="remove"
               disabled={removing.has(t.infoHashHex)}
@@ -136,10 +162,17 @@
     cursor: help;
   }
 
+  td.actions {
+    display: flex;
+    gap: 0.4rem;
+    align-items: center;
+  }
+
+  button.pause,
+  button.resume,
   button.remove {
     background: none;
-    border: 1px solid #f87171;
-    color: #f87171;
+    border: 1px solid;
     border-radius: 4px;
     cursor: pointer;
     padding: 0.2rem 0.5rem;
@@ -147,12 +180,18 @@
     transition: background 0.15s;
   }
 
-  button.remove:hover {
-    background: #f8717122;
+  button.pause,
+  button.resume,
+  button.remove {
+    &:disabled { opacity: 0.5; cursor: not-allowed; }
   }
 
-  button.remove:disabled {
-    opacity: 0.5;
-    cursor: not-allowed;
-  }
+  button.pause  { color: #60a5fa; border-color: #60a5fa; }
+  button.pause:hover  { background: #60a5fa22; }
+
+  button.resume { color: #4ade80; border-color: #4ade80; }
+  button.resume:hover { background: #4ade8022; }
+
+  button.remove { color: #f87171; border-color: #f87171; }
+  button.remove:hover { background: #f8717122; }
 </style>

ui/src/lib/api.ts

@@ -7,7 +7,7 @@ export interface TorrentState {
   uploaded: number;
   downloaded: number;
   left: number;
-  status: "idle" | "running" | "stopping" | "stopped" | "error";
+  status: "idle" | "running" | "paused" | "stopping" | "stopped" | "error";
   lastAnnounce: string | null;
   lastInterval: number;
   seeders: number;
@@ -45,6 +45,14 @@ export async function removeTorrent(hash: string): Promise<void> {
   await fetch(`${BASE}/torrents/${hash}`, { method: "DELETE" });
 }
 
+export async function pauseTorrent(hash: string): Promise<void> {
+  await fetch(`${BASE}/torrents/${hash}/pause`, { method: "POST" });
+}
+
+export async function resumeTorrent(hash: string): Promise<void> {
+  await fetch(`${BASE}/torrents/${hash}/resume`, { method: "POST" });
+}
+
 export interface AppConfig {
   port: number;
   announcePort: number;