migrate to ThreadSubscription model and enable self-unsubscribe (#569)

Co-authored-by: rleed <rleed1@pm.me>

api/resolvers/notifications.js

@@ -73,19 +73,6 @@ export default {
 
       const itemDrivenQueries = []
 
-      // Replies
-      itemDrivenQueries.push(
-        `SELECT "Item".*, "Item".created_at AS "sortTime", 'Reply' AS type
-          FROM "Item"
-          JOIN "Item" p ON ${meFull.noteAllDescendants ? '"Item".path <@ p.path' : '"Item"."parentId" = p.id'}
-          ${whereClause(
-            'p."userId" = $1',
-            '"Item"."userId" <> $1'
-          )}
-          ORDER BY "sortTime" DESC
-          LIMIT ${LIMIT}+$3`
-      )
-
       // Thread subscriptions
       itemDrivenQueries.push(
         `SELECT "Item".*, "Item".created_at AS "sortTime", 'Reply' AS type

components/item-info.js

@@ -137,7 +137,7 @@ export default function ItemInfo ({
         {(item.parentId || item.text) && onQuoteReply &&
           <Dropdown.Item onClick={onQuoteReply}>quote reply</Dropdown.Item>}
         {me && <BookmarkDropdownItem item={item} />}
-        {me && !item.mine && <SubscribeDropdownItem item={item} />}
+        {me && <SubscribeDropdownItem item={item} />}
         {item.otsHash &&
           <Link href={`/items/${item.id}/ots`} className='text-reset dropdown-item'>
             opentimestamp

prisma/migrations/20231710162230_self_subscription/migration.sql

@@ -0,0 +1,108 @@
+-- migrate old items to ThreadSubscription model
+INSERT INTO "ThreadSubscription" ("itemId", "userId")
+    SELECT "Item".id, "Item"."userId" FROM "Item" ON CONFLICT DO NOTHING;
+
+-- auto self-subscribe
+CREATE OR REPLACE FUNCTION create_item(
+    jitem JSONB, forward JSONB, poll_options JSONB, spam_within INTERVAL)
+RETURNS "Item"
+LANGUAGE plpgsql
+AS $$
+DECLARE
+    user_msats BIGINT;
+    cost_msats BIGINT;
+    freebie BOOLEAN;
+    item "Item";
+    med_votes FLOAT;
+    select_clause TEXT;
+BEGIN
+    PERFORM ASSERT_SERIALIZED();
+
+    -- access fields with appropriate types
+    item := jsonb_populate_record(NULL::"Item", jitem);
+
+    SELECT msats INTO user_msats FROM users WHERE id = item."userId";
+
+    IF item."maxBid" IS NOT NULL THEN
+        cost_msats := 1000000;
+    ELSE
+        cost_msats := 1000 * POWER(10, item_spam(item."parentId", item."userId", spam_within));
+    END IF;
+    -- it's only a freebie if it's a 1 sat cost, they have < 1 sat, and boost = 0
+    freebie := (cost_msats <= 1000) AND (user_msats < 1000) AND (item.boost = 0);
+
+    IF NOT freebie AND cost_msats > user_msats THEN
+        RAISE EXCEPTION 'SN_INSUFFICIENT_FUNDS';
+    END IF;
+
+    -- get this user's median item score
+    SELECT COALESCE(
+        percentile_cont(0.5) WITHIN GROUP(
+            ORDER BY "weightedVotes" - "weightedDownVotes"), 0)
+        INTO med_votes FROM "Item" WHERE "userId" = item."userId";
+
+    -- if their median votes are positive, start at 0
+    -- if the median votes are negative, start their post with that many down votes
+    -- basically: if their median post is bad, presume this post is too
+    -- addendum: if they're an anon poster, always start at 0
+    IF med_votes >= 0 OR item."userId" = 27 THEN
+        med_votes := 0;
+    ELSE
+        med_votes := ABS(med_votes);
+    END IF;
+
+    -- there's no great way to set default column values when using json_populate_record
+    -- so we need to only select fields with non-null values that way when func input
+    -- does not include a value, the default value is used instead of null
+    SELECT string_agg(quote_ident(key), ',') INTO select_clause
+    FROM jsonb_object_keys(jsonb_strip_nulls(jitem)) k(key);
+    -- insert the item
+    EXECUTE format($fmt$
+        INSERT INTO "Item" (%s, "weightedDownVotes")
+        SELECT %1$s, %L
+        FROM jsonb_populate_record(NULL::"Item", %L) RETURNING *
+    $fmt$, select_clause, med_votes, jitem) INTO item;
+
+    INSERT INTO "ItemForward" ("itemId", "userId", "pct")
+        SELECT item.id, "userId", "pct" FROM jsonb_populate_recordset(NULL::"ItemForward", forward);
+
+    -- Automatically subscribe to one's own posts
+    INSERT INTO "ThreadSubscription" ("itemId", "userId")
+    VALUES (item.id, item."userId");
+
+    -- Automatically subscribe forward recipients to the new post
+    INSERT INTO "ThreadSubscription" ("itemId", "userId")
+        SELECT item.id, "userId" FROM jsonb_populate_recordset(NULL::"ItemForward", forward);
+
+    INSERT INTO "PollOption" ("itemId", "option")
+        SELECT item.id, "option" FROM jsonb_array_elements_text(poll_options) o("option");
+
+    IF NOT freebie THEN
+        UPDATE users SET msats = msats - cost_msats WHERE id = item."userId";
+
+        INSERT INTO "ItemAct" (msats, "itemId", "userId", act)
+        VALUES (cost_msats, item.id, item."userId", 'FEE');
+    END IF;
+
+    -- if this item has boost
+    IF item.boost > 0 THEN
+        PERFORM item_act(item.id, item."userId", 'BOOST', item.boost);
+    END IF;
+
+    -- if this is a job
+    IF item."maxBid" IS NOT NULL THEN
+        PERFORM run_auction(item.id);
+    END IF;
+
+    -- if this is a bio
+    IF item.bio THEN
+        UPDATE users SET "bioId" = item.id WHERE id = item."userId";
+    END IF;
+
+    -- schedule imgproxy job
+    INSERT INTO pgboss.job (name, data, retrylimit, retrybackoff, startafter)
+    VALUES ('imgproxy', jsonb_build_object('id', item.id), 21, true, now() + interval '5 seconds');
+
+    RETURN item;
+END;
+$$;