feat(chat): share a chat by link — anonymous read-only /shared/<token> page, share/unshare

2026-08-30 01:34:44 -04:00
parent ece93a7c8f
commit 114b115034
28 changed files with 3442 additions and 54 deletions
@@ -0,0 +1,45 @@
+"""saved_chats.share_token: the anonymous share link (phase 51)
+
+Revision ID: 0009
+Revises: 0008
+Create Date: 2026-08-29
+
+Phase 51 (share-a-chat-by-link, owner-locked 2026-08-29): a saved chat
+can be turned into a public link — ``/shared/<token>`` — that anyone
+with the URL can read anonymously (no admin session); unsharing sets
+the token back to NULL and revokes the link.
+
+* ``saved_chats.share_token`` — ``UUID`` (a 128-bit ``uuid4``), NULL =
+  not shared. One column, no new table (A10 extension unchanged —
+  sharing reuses the already-stored row).
+* ``ix_saved_chats_share_token`` — UNIQUE index on the column. A unique
+  index on a NULLable column: Postgres treats NULLs as distinct, so any
+  number of unshared chats coexist while two identical non-NULL tokens
+  can never exist (the ``git_sources.path`` house precedent, phase 38).
+"""
+from __future__ import annotations
+
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+from alembic import op
+
+revision = "0009"
+down_revision = "0008"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "saved_chats",
+        sa.Column("share_token", postgresql.UUID(as_uuid=True), nullable=True),
+    )
+    op.create_index(
+        "ix_saved_chats_share_token", "saved_chats", ["share_token"], unique=True
+    )
+
+
+def downgrade() -> None:
+    op.drop_index("ix_saved_chats_share_token", table_name="saved_chats")
+    op.drop_column("saved_chats", "share_token")