mps: torrent distribution — shop toggle + per-product magnet link

Shop settings: new 'Torrent Distribution' section with single checkbox
(torrent_enabled, default False). When on, product edit shows a magnet
link field; content page shows a Torrent button alongside Download.

- models/shop.py: torrent_enabled (Boolean, default False)
- models/product.py: torrent_magnet_link (UnicodeText, nullable)
- views/shop.py: torrent-settings form section handler
- views/product.py: save/validate magnet link on product edit
- views/content.py: pass torrent_magnet_link to content template
- templates/shop_settings.j2: Torrent Distribution section
- templates/product_edit.j2: magnet link field (shown when torrent enabled)
- templates/content.j2: Torrent button beside Download
- migration: a1b2c3d4e5f6 adds both columns
- tests: 6 functional tests covering enable/disable, magnet save,
  invalid scheme rejection, and no-leak when disabled

make_post_sell/models/product.py

@@ -109,6 +109,9 @@ class Product(RBase, Base):
 
     total_file_bytes = Column(BigInteger, nullable=False, default=0)
 
+    # Optional magnet link for BitTorrent distribution (set when shop.torrent_enabled)
+    torrent_magnet_link = Column(UnicodeText, nullable=True)
+
     # a denormalized json field to relate products to bundles, and vice versa.
     json_bundle_metadata = Column(
         UnicodeText, default=DEFAULT_BUNDLE_METADATA, nullable=False

make_post_sell/models/shop.py

@@ -183,6 +183,9 @@ class Shop(RBase, Base):
     primary_s3_cdn_endpoint = Column(Unicode(256), nullable=True)
     primary_s3_enabled = Column(Boolean, default=False)
 
+    # Torrent / magnet link distribution (off by default)
+    torrent_enabled = Column(Boolean, default=False)
+
     # Precomputed discovery ring: circular ordering of all public products
     json_discovery_ring = Column(UnicodeText, nullable=True)
 

make_post_sell/scripts/alembic/versions/a1b2c3d4e5f6_torrent_magnet_links.py

@@ -0,0 +1,33 @@
+"""torrent magnet links
+
+Revision ID: a1b2c3d4e5f6
+Revises: fd9f7e2f2b78
+Create Date: 2026-04-05 00:00:00.000000
+
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "a1b2c3d4e5f6"
+down_revision = "fd9f7e2f2b78"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.add_column(
+        "mps_shop",
+        sa.Column("torrent_enabled", sa.Boolean(), nullable=True, server_default=sa.false()),
+    )
+    op.add_column(
+        "mps_product",
+        sa.Column("torrent_magnet_link", sa.UnicodeText(), nullable=True),
+    )
+
+
+def downgrade():
+    op.drop_column("mps_shop", "torrent_enabled")
+    op.drop_column("mps_product", "torrent_magnet_link")

make_post_sell/templates/content.j2

@@ -156,6 +156,9 @@
       {% if signed_get_object_url is not none %}
         <a href="{{ signed_get_object_url }}" class="product-download-button mps-button" target="_blank" download>&#11123 Download</a>
       {% endif %}
+      {% if torrent_magnet_link %}
+        <a href="{{ torrent_magnet_link }}" class="mps-button" style="margin-left:.5rem">&#9697; Torrent</a>
+      {% endif %}
     </div>
     {% endif %}
     <div id="watch-queue" class="js-only" style="display:none">

make_post_sell/templates/product_edit.j2

@@ -288,6 +288,17 @@ Your cover (<code>thumbnail1</code>) will show up on search pages.
     <br />
     <br />
 
+    {% if torrent_enabled %}
+    <label for="torrent_magnet_link">Magnet Link <span style="font-weight:normal;color:#888">(optional — torrent download for buyers)</span></label>
+    <input type="text" name="torrent_magnet_link" id="torrent_magnet_link"
+           value="{{ torrent_magnet_link }}"
+           placeholder="magnet:?xt=urn:btih:..."
+           class="mps-text-input" />
+
+    <br />
+    <br />
+    {% endif %}
+
     <input type="submit" name="submit" class="mps-submit" value="Save Settings" />
   </form>
 </section>

make_post_sell/templates/shop_settings.j2

@@ -1284,6 +1284,36 @@ Existing sales honored for download buy purchasers.
 </section>
 
 
+<br />
+<br />
+
+<section class="one-column">
+  <section class="shop-settings well">
+
+    <h3>Torrent Distribution</h3>
+
+    <p>When enabled, you can add a magnet link to each product. Buyers see a torrent download option alongside the standard download link. Off by default.</p>
+
+    <form method="post" action="/s/{{ request.shop.id }}/settings" onsubmit="submit.disabled = true; return true;">
+      <input type="hidden" name="form_section" value="torrent-settings" />
+
+      <label>
+        <input type="checkbox" name="torrent_enabled_checkbox"
+               {% if torrent_enabled %}checked{% endif %} />
+        Enable torrent distribution
+      </label>
+
+      <br /><br />
+
+      <input type="submit" name="submit" class="mps-submit" value="Save Settings" />
+
+    </form>
+
+  </section>
+
+</section>
+
+
 <script>
 document.addEventListener('DOMContentLoaded', function() {
     // Crypto wallets toggle (still uses checkbox pattern)

make_post_sell/tests/test_functional.py

@@ -4861,3 +4861,100 @@ class TestBucketSettings(_AuthenticatedBase):
         self.assertIn("Storage bucket settings updated", flash)
         self.dbsession.refresh(shop)
         self.assertFalse(shop.primary_s3_enabled)
+
+
+class TestTorrentSettings(_AuthenticatedBase):
+    """Functional tests for torrent distribution settings."""
+
+    def test_enable_torrent(self):
+        shop = self._create_shop_helper()
+        self.assertFalse(shop.torrent_enabled)
+        res = self.testapp.post(
+            f"/s/{shop.id}/settings",
+            {
+                "form_section": "torrent-settings",
+                "torrent_enabled_checkbox": "on",
+                "submit": "Save Settings",
+            },
+            status=302,
+        )
+        res = res.follow()
+        flash = self._get_flash_messages(res)
+        self.assertIn("Torrent distribution enabled", flash)
+        self.dbsession.refresh(shop)
+        self.assertTrue(shop.torrent_enabled)
+
+    def test_disable_torrent(self):
+        shop = self._create_shop_helper()
+        shop.torrent_enabled = True
+        self.dbsession.flush()
+        res = self.testapp.post(
+            f"/s/{shop.id}/settings",
+            {
+                "form_section": "torrent-settings",
+                "submit": "Save Settings",
+            },
+            status=302,
+        )
+        res = res.follow()
+        flash = self._get_flash_messages(res)
+        self.assertIn("Torrent distribution disabled", flash)
+        self.dbsession.refresh(shop)
+        self.assertFalse(shop.torrent_enabled)
+
+    def test_torrent_off_by_default(self):
+        shop = self._create_shop_helper()
+        self.assertFalse(shop.torrent_enabled)
+
+    def test_magnet_link_saved_on_product(self):
+        shop = self._create_shop_helper()
+        shop.torrent_enabled = True
+        self.dbsession.flush()
+        product = self._create_product_helper(shop)
+        magnet = "magnet:?xt=urn:btih:abc123&dn=test"
+        res = self.testapp.post(
+            f"/p/{product.id}/edit",
+            {
+                "title": product.title,
+                "description": product.description or "",
+                "price": "0.00",
+                "visibility": str(product.visibility),
+                "torrent_magnet_link": magnet,
+                "submit": "Save Settings",
+            },
+            status=302,
+        )
+        self.dbsession.refresh(product)
+        self.assertEqual(product.torrent_magnet_link, magnet)
+
+    def test_magnet_link_rejected_if_invalid_scheme(self):
+        shop = self._create_shop_helper()
+        shop.torrent_enabled = True
+        self.dbsession.flush()
+        product = self._create_product_helper(shop)
+        res = self.testapp.post(
+            f"/p/{product.id}/edit",
+            {
+                "title": product.title,
+                "description": product.description or "",
+                "price": "0.00",
+                "visibility": str(product.visibility),
+                "torrent_magnet_link": "https://not-a-magnet-link",
+                "submit": "Save Settings",
+            },
+            status=302,
+        )
+        res = res.follow()
+        flash = self._get_flash_messages(res)
+        self.assertIn("Magnet link must start with magnet:", flash)
+        self.dbsession.refresh(product)
+        self.assertIsNone(product.torrent_magnet_link)
+
+    def test_magnet_link_not_shown_when_torrent_disabled(self):
+        shop = self._create_shop_helper()
+        self.assertFalse(shop.torrent_enabled)
+        product = self._create_product_helper(shop)
+        product.torrent_magnet_link = "magnet:?xt=urn:btih:abc123"
+        self.dbsession.flush()
+        res = self.testapp.get(f"/c/{product.id}/{product.slug}", status=200)
+        self.assertNotIn("Torrent", res.text)

make_post_sell/views/content.py

@@ -110,4 +110,5 @@ def content(request):
         "instrumentals_url": instrumentals_url,
         "vocals_url": vocals_url,
         "karaoke_eligible": karaoke_eligible,
+        "torrent_magnet_link": product.torrent_magnet_link if product.shop.torrent_enabled else None,
     }

make_post_sell/views/product.py

@@ -297,6 +297,18 @@ def product_edit(request):
         request.dbsession.add(product.set_price(price))
         request.session.flash(("You updated the product's price.", "success"))
 
+    if product.shop.torrent_enabled:
+        torrent_magnet_link = request.params.get("torrent_magnet_link", "").strip()
+        if torrent_magnet_link and not torrent_magnet_link.startswith("magnet:"):
+            request.session.flash(("Magnet link must start with magnet:", "error"))
+        elif torrent_magnet_link != (product.torrent_magnet_link or ""):
+            product_modified = True
+            product.torrent_magnet_link = torrent_magnet_link or None
+            if torrent_magnet_link:
+                request.session.flash(("Magnet link saved.", "success"))
+            else:
+                request.session.flash(("Magnet link removed.", "success"))
+
     if s3_webhook_key and s3_webhook_bucket and s3_webhook_etag:
         # Check if the file exists and has a non-zero size
         try:
@@ -511,6 +523,8 @@ def product_edit(request):
         "locations": locations,
         "inventories": inventories if product.is_physical else {},
         "price_history": price_history,
+        "torrent_enabled": product.shop.torrent_enabled,
+        "torrent_magnet_link": product.torrent_magnet_link or "",
     }
 
 

make_post_sell/views/shop.py

@@ -1176,6 +1176,18 @@ def shop_settings(request):
                     else:
                         request.session.flash(("Storage bucket settings updated.", "success"))
 
+        if form_section == "torrent-settings":
+            torrent_enabled = checkbox_to_bool(
+                request.params.get("torrent_enabled_checkbox", "off")
+            )
+            changed = False
+            if shop.torrent_enabled != torrent_enabled:
+                shop.torrent_enabled = torrent_enabled
+                changed = True
+            if changed:
+                status = "enabled" if torrent_enabled else "disabled"
+                request.session.flash((f"Torrent distribution {status}.", "success"))
+
     # If we processed any form submission, respond accordingly
     if form_section:
         if request.headers.get("X-Requested-With") == "XMLHttpRequest":
@@ -1380,6 +1392,7 @@ def shop_settings(request):
         "primary_s3_secret_key": shop.primary_s3_secret_key or "",
         "primary_s3_cdn_endpoint": shop.primary_s3_cdn_endpoint or "",
         "primary_s3_enabled": shop.primary_s3_enabled,
+        "torrent_enabled": shop.torrent_enabled,
         "signed_posts": signed_posts,
         "get_endpoints": get_endpoints,
     }