add a couple post endpoints + /timelines/home

internal/database/sql/timeline.go

@@ -0,0 +1,49 @@
+package sql
+
+import (
+	"context"
+
+	"git.sleepycat.moe/sam/mercury/internal/database"
+	"github.com/keegancsmith/sqlf"
+	"github.com/oklog/ulid/v2"
+)
+
+// TimelineStore is the interface to post timelines in the database.
+type TimelineStore struct {
+	q Querier
+}
+
+// NewTimelineStore creates a new TimelineStore instance.
+func NewTimelineStore(q Querier) *TimelineStore {
+	return &TimelineStore{q: q}
+}
+
+type TimelinePost struct {
+	database.Post
+	database.Blog
+}
+
+func (s *TimelineStore) Home(ctx context.Context, accountID ulid.ULID, limit int, before, after *ulid.ULID) ([]TimelinePost, error) {
+	q := sqlf.Sprintf("SELECT p.*, b.account_id, b.name, b.domain FROM posts p JOIN blogs b ON b.id = p.blog_id")
+
+	q = sqlf.Sprintf("%v WHERE (blog_id IN (%s) OR blog_id IN (%s))", q,
+		sqlf.Sprintf("SELECT id FROM blogs WHERE account_id = %s", accountID),
+		sqlf.Sprintf("SELECT blog_id FROM account_follows WHERE account_id = %s", accountID))
+
+	if before != nil {
+		q = sqlf.Sprintf("%v AND id < %s", q, *before)
+	}
+	if after != nil {
+		q = sqlf.Sprintf("%v AND id > %s", q, *after)
+	}
+
+	q = sqlf.Sprintf("%v AND (visibility != %s OR (b.account_id = %s OR %s IN (%s)))", q, database.DirectVisibility, accountID, accountID,
+		sqlf.Sprintf("SELECT account_id FROM blogs WHERE id IN (SELECT blog_id FROM post_recipients WHERE post_id = p.id)"))
+
+	if limit <= 0 || limit > 100 {
+		limit = 100
+	}
+	q = sqlf.Sprintf("%v ORDER BY id DESC LIMIT %d", q, limit)
+
+	return Select[TimelinePost](ctx, s.q, q)
+}