business: add privacy-aware user projection

(cherry picked from commit a636192ef22ee69d792b0ca7db1c6be963be9cb2)

deploy/migrations/0069_privacy_and_profile_photo_kinds.down.sql

@@ -0,0 +1,26 @@
+DROP INDEX IF EXISTS contacts_personal_photo_idx;
+
+ALTER TABLE contacts
+    DROP COLUMN IF EXISTS personal_photo_date,
+    DROP COLUMN IF EXISTS personal_photo_id;
+
+DROP INDEX IF EXISTS profile_photos_current_idx;
+
+ALTER TABLE profile_photos
+    DROP CONSTRAINT IF EXISTS profile_photos_kind_check;
+
+ALTER TABLE profile_photos
+    DROP CONSTRAINT IF EXISTS profile_photos_pkey;
+
+ALTER TABLE profile_photos
+    ADD CONSTRAINT profile_photos_pkey PRIMARY KEY (owner_peer_type, owner_peer_id, photo_id);
+
+ALTER TABLE profile_photos
+    DROP COLUMN IF EXISTS kind;
+
+CREATE INDEX IF NOT EXISTS profile_photos_current_idx
+    ON profile_photos (owner_peer_type, owner_peer_id, sort_order DESC)
+    WHERE active;
+
+DROP TABLE IF EXISTS account_privacy_rules;
+

deploy/migrations/0069_privacy_and_profile_photo_kinds.up.sql

@@ -0,0 +1,39 @@
+-- 0069_privacy_and_profile_photo_kinds: account privacy rules, fallback photos,
+-- and viewer-private contact profile photos.
+
+CREATE TABLE IF NOT EXISTS account_privacy_rules (
+    owner_user_id BIGINT      NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    privacy_key   TEXT        NOT NULL,
+    rules         JSONB       NOT NULL DEFAULT '[]'::jsonb,
+    updated_at    TIMESTAMPTZ NOT NULL DEFAULT now(),
+    PRIMARY KEY (owner_user_id, privacy_key)
+);
+
+ALTER TABLE profile_photos
+    ADD COLUMN IF NOT EXISTS kind TEXT NOT NULL DEFAULT 'profile';
+
+ALTER TABLE profile_photos
+    DROP CONSTRAINT IF EXISTS profile_photos_pkey;
+
+ALTER TABLE profile_photos
+    ADD CONSTRAINT profile_photos_pkey PRIMARY KEY (owner_peer_type, owner_peer_id, kind, photo_id);
+
+ALTER TABLE profile_photos
+    DROP CONSTRAINT IF EXISTS profile_photos_kind_check;
+
+ALTER TABLE profile_photos
+    ADD CONSTRAINT profile_photos_kind_check CHECK (kind IN ('profile', 'fallback'));
+
+DROP INDEX IF EXISTS profile_photos_current_idx;
+CREATE INDEX IF NOT EXISTS profile_photos_current_idx
+    ON profile_photos (owner_peer_type, owner_peer_id, kind, sort_order DESC)
+    WHERE active;
+
+ALTER TABLE contacts
+    ADD COLUMN IF NOT EXISTS personal_photo_id BIGINT NOT NULL DEFAULT 0,
+    ADD COLUMN IF NOT EXISTS personal_photo_date INT NOT NULL DEFAULT 0;
+
+CREATE INDEX IF NOT EXISTS contacts_personal_photo_idx
+    ON contacts (user_id, contact_user_id)
+    WHERE personal_photo_id <> 0;
+