veryroundbird.house
1package db
2
3import (
4 "context"
5 "database/sql"
6 "fmt"
7 "log"
8 "reflect"
9 "strings"
10
11 _ "github.com/mattn/go-sqlite3"
12)
13
14type DB struct {
15 *sql.DB
16}
17
18type Execer interface {
19 Query(query string, args ...any) (*sql.Rows, error)
20 QueryContext(ctx context.Context, query string, args ...any) (*sql.Rows, error)
21 QueryRow(query string, args ...any) *sql.Row
22 QueryRowContext(ctx context.Context, query string, args ...any) *sql.Row
23 Exec(query string, args ...any) (sql.Result, error)
24 ExecContext(ctx context.Context, query string, args ...any) (sql.Result, error)
25 Prepare(query string) (*sql.Stmt, error)
26 PrepareContext(ctx context.Context, query string) (*sql.Stmt, error)
27}
28
29func Make(dbPath string) (*DB, error) {
30 // https://github.com/mattn/go-sqlite3#connection-string
31 opts := []string{
32 "_foreign_keys=1",
33 "_journal_mode=WAL",
34 "_synchronous=NORMAL",
35 "_auto_vacuum=incremental",
36 }
37
38 db, err := sql.Open("sqlite3", dbPath+"?"+strings.Join(opts, "&"))
39 if err != nil {
40 return nil, err
41 }
42
43 ctx := context.Background()
44
45 conn, err := db.Conn(ctx)
46 if err != nil {
47 return nil, err
48 }
49 defer conn.Close()
50
51 _, err = conn.ExecContext(ctx, `
52 create table if not exists registrations (
53 id integer primary key autoincrement,
54 domain text not null unique,
55 did text not null,
56 secret text not null,
57 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
58 registered text
59 );
60 create table if not exists public_keys (
61 id integer primary key autoincrement,
62 did text not null,
63 name text not null,
64 key text not null,
65 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
66 unique(did, name, key)
67 );
68 create table if not exists repos (
69 id integer primary key autoincrement,
70 did text not null,
71 name text not null,
72 knot text not null,
73 rkey text not null,
74 at_uri text not null unique,
75 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
76 unique(did, name, knot, rkey)
77 );
78 create table if not exists collaborators (
79 id integer primary key autoincrement,
80 did text not null,
81 repo integer not null,
82 foreign key (repo) references repos(id) on delete cascade
83 );
84 create table if not exists follows (
85 user_did text not null,
86 subject_did text not null,
87 rkey text not null,
88 followed_at text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
89 primary key (user_did, subject_did),
90 check (user_did <> subject_did)
91 );
92 create table if not exists issues (
93 id integer primary key autoincrement,
94 owner_did text not null,
95 repo_at text not null,
96 issue_id integer not null,
97 title text not null,
98 body text not null,
99 open integer not null default 1,
100 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
101 issue_at text,
102 unique(repo_at, issue_id),
103 foreign key (repo_at) references repos(at_uri) on delete cascade
104 );
105 create table if not exists comments (
106 id integer primary key autoincrement,
107 owner_did text not null,
108 issue_id integer not null,
109 repo_at text not null,
110 comment_id integer not null,
111 comment_at text not null,
112 body text not null,
113 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
114 unique(issue_id, comment_id),
115 foreign key (repo_at, issue_id) references issues(repo_at, issue_id) on delete cascade
116 );
117 create table if not exists pulls (
118 -- identifiers
119 id integer primary key autoincrement,
120 pull_id integer not null,
121
122 -- at identifiers
123 repo_at text not null,
124 owner_did text not null,
125 rkey text not null,
126 pull_at text,
127
128 -- content
129 title text not null,
130 body text not null,
131 target_branch text not null,
132 state integer not null default 0 check (state in (0, 1, 2)), -- open, merged, closed
133
134 -- meta
135 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
136
137 -- constraints
138 unique(repo_at, pull_id),
139 foreign key (repo_at) references repos(at_uri) on delete cascade
140 );
141
142 -- every pull must have atleast 1 submission: the initial submission
143 create table if not exists pull_submissions (
144 -- identifiers
145 id integer primary key autoincrement,
146 pull_id integer not null,
147
148 -- at identifiers
149 repo_at text not null,
150
151 -- content, these are immutable, and require a resubmission to update
152 round_number integer not null default 0,
153 patch text,
154
155 -- meta
156 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
157
158 -- constraints
159 unique(repo_at, pull_id, round_number),
160 foreign key (repo_at, pull_id) references pulls(repo_at, pull_id) on delete cascade
161 );
162
163 create table if not exists pull_comments (
164 -- identifiers
165 id integer primary key autoincrement,
166 pull_id integer not null,
167 submission_id integer not null,
168
169 -- at identifiers
170 repo_at text not null,
171 owner_did text not null,
172 comment_at text not null,
173
174 -- content
175 body text not null,
176
177 -- meta
178 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
179
180 -- constraints
181 foreign key (repo_at, pull_id) references pulls(repo_at, pull_id) on delete cascade,
182 foreign key (submission_id) references pull_submissions(id) on delete cascade
183 );
184
185 create table if not exists _jetstream (
186 id integer primary key autoincrement,
187 last_time_us integer not null
188 );
189
190 create table if not exists repo_issue_seqs (
191 repo_at text primary key,
192 next_issue_id integer not null default 1
193 );
194
195 create table if not exists repo_pull_seqs (
196 repo_at text primary key,
197 next_pull_id integer not null default 1
198 );
199
200 create table if not exists stars (
201 id integer primary key autoincrement,
202 starred_by_did text not null,
203 repo_at text not null,
204 rkey text not null,
205 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
206 foreign key (repo_at) references repos(at_uri) on delete cascade,
207 unique(starred_by_did, repo_at)
208 );
209
210 create table if not exists reactions (
211 id integer primary key autoincrement,
212 reacted_by_did text not null,
213 thread_at text not null,
214 kind text not null,
215 rkey text not null,
216 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
217 unique(reacted_by_did, thread_at, kind)
218 );
219
220 create table if not exists emails (
221 id integer primary key autoincrement,
222 did text not null,
223 email text not null,
224 verified integer not null default 0,
225 verification_code text not null,
226 last_sent text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
227 is_primary integer not null default 0,
228 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
229 unique(did, email)
230 );
231
232 create table if not exists artifacts (
233 -- id
234 id integer primary key autoincrement,
235 did text not null,
236 rkey text not null,
237
238 -- meta
239 repo_at text not null,
240 tag binary(20) not null,
241 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
242
243 -- data
244 blob_cid text not null,
245 name text not null,
246 size integer not null default 0,
247 mimetype string not null default "*/*",
248
249 -- constraints
250 unique(did, rkey), -- record must be unique
251 unique(repo_at, tag, name), -- for a given tag object, each file must be unique
252 foreign key (repo_at) references repos(at_uri) on delete cascade
253 );
254
255 create table if not exists profile (
256 -- id
257 id integer primary key autoincrement,
258 did text not null,
259
260 -- data
261 description text not null,
262 include_bluesky integer not null default 0,
263 location text,
264
265 -- constraints
266 unique(did)
267 );
268 create table if not exists profile_links (
269 -- id
270 id integer primary key autoincrement,
271 did text not null,
272
273 -- data
274 link text not null,
275
276 -- constraints
277 foreign key (did) references profile(did) on delete cascade
278 );
279 create table if not exists profile_stats (
280 -- id
281 id integer primary key autoincrement,
282 did text not null,
283
284 -- data
285 kind text not null check (kind in (
286 "merged-pull-request-count",
287 "closed-pull-request-count",
288 "open-pull-request-count",
289 "open-issue-count",
290 "closed-issue-count",
291 "repository-count"
292 )),
293
294 -- constraints
295 foreign key (did) references profile(did) on delete cascade
296 );
297 create table if not exists profile_pinned_repositories (
298 -- id
299 id integer primary key autoincrement,
300 did text not null,
301
302 -- data
303 at_uri text not null,
304
305 -- constraints
306 unique(did, at_uri),
307 foreign key (did) references profile(did) on delete cascade,
308 foreign key (at_uri) references repos(at_uri) on delete cascade
309 );
310
311 create table if not exists oauth_requests (
312 id integer primary key autoincrement,
313 auth_server_iss text not null,
314 state text not null,
315 did text not null,
316 handle text not null,
317 pds_url text not null,
318 pkce_verifier text not null,
319 dpop_auth_server_nonce text not null,
320 dpop_private_jwk text not null
321 );
322
323 create table if not exists oauth_sessions (
324 id integer primary key autoincrement,
325 did text not null,
326 handle text not null,
327 pds_url text not null,
328 auth_server_iss text not null,
329 access_jwt text not null,
330 refresh_jwt text not null,
331 dpop_pds_nonce text,
332 dpop_auth_server_nonce text not null,
333 dpop_private_jwk text not null,
334 expiry text not null
335 );
336
337 create table if not exists punchcard (
338 did text not null,
339 date text not null, -- yyyy-mm-dd
340 count integer,
341 primary key (did, date)
342 );
343
344 create table if not exists spindles (
345 id integer primary key autoincrement,
346 owner text not null,
347 instance text not null,
348 verified text, -- time of verification
349 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
350
351 unique(owner, instance)
352 );
353
354 create table if not exists spindle_members (
355 -- identifiers for the record
356 id integer primary key autoincrement,
357 did text not null,
358 rkey text not null,
359
360 -- data
361 instance text not null,
362 subject text not null,
363 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
364
365 -- constraints
366 unique (did, instance, subject)
367 );
368
369 create table if not exists pipelines (
370 -- identifiers
371 id integer primary key autoincrement,
372 knot text not null,
373 rkey text not null,
374
375 repo_owner text not null,
376 repo_name text not null,
377
378 -- every pipeline must be associated with exactly one commit
379 sha text not null check (length(sha) = 40),
380 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
381
382 -- trigger data
383 trigger_id integer not null,
384
385 unique(knot, rkey),
386 foreign key (trigger_id) references triggers(id) on delete cascade
387 );
388
389 create table if not exists triggers (
390 -- primary key
391 id integer primary key autoincrement,
392
393 -- top-level fields
394 kind text not null,
395
396 -- pushTriggerData fields
397 push_ref text,
398 push_new_sha text check (length(push_new_sha) = 40),
399 push_old_sha text check (length(push_old_sha) = 40),
400
401 -- pullRequestTriggerData fields
402 pr_source_branch text,
403 pr_target_branch text,
404 pr_source_sha text check (length(pr_source_sha) = 40),
405 pr_action text
406 );
407
408 create table if not exists pipeline_statuses (
409 -- identifiers
410 id integer primary key autoincrement,
411 spindle text not null,
412 rkey text not null,
413
414 -- referenced pipeline. these form the (did, rkey) pair
415 pipeline_knot text not null,
416 pipeline_rkey text not null,
417
418 -- content
419 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
420 workflow text not null,
421 status text not null,
422 error text,
423 exit_code integer not null default 0,
424
425 unique (spindle, rkey),
426 foreign key (pipeline_knot, pipeline_rkey)
427 references pipelines (knot, rkey)
428 on delete cascade
429 );
430
431 create table if not exists repo_languages (
432 -- identifiers
433 id integer primary key autoincrement,
434
435 -- repo identifiers
436 repo_at text not null,
437 ref text not null,
438 is_default_ref integer not null default 0,
439
440 -- language breakdown
441 language text not null,
442 bytes integer not null check (bytes >= 0),
443
444 unique(repo_at, ref, language)
445 );
446
447 create table if not exists signups_inflight (
448 id integer primary key autoincrement,
449 email text not null unique,
450 invite_code text not null,
451 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now'))
452 );
453
454 create table if not exists strings (
455 -- identifiers
456 did text not null,
457 rkey text not null,
458
459 -- content
460 filename text not null,
461 description text,
462 content text not null,
463 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
464 edited text,
465
466 primary key (did, rkey)
467 );
468
469 create table if not exists migrations (
470 id integer primary key autoincrement,
471 name text unique
472 );
473
474 -- indexes for better star query performance
475 create index if not exists idx_stars_created on stars(created);
476 create index if not exists idx_stars_repo_at_created on stars(repo_at, created);
477 `)
478 if err != nil {
479 return nil, err
480 }
481
482 // run migrations
483 runMigration(conn, "add-description-to-repos", func(tx *sql.Tx) error {
484 tx.Exec(`
485 alter table repos add column description text check (length(description) <= 200);
486 `)
487 return nil
488 })
489
490 runMigration(conn, "add-rkey-to-pubkeys", func(tx *sql.Tx) error {
491 // add unconstrained column
492 _, err := tx.Exec(`
493 alter table public_keys
494 add column rkey text;
495 `)
496 if err != nil {
497 return err
498 }
499
500 // backfill
501 _, err = tx.Exec(`
502 update public_keys
503 set rkey = ''
504 where rkey is null;
505 `)
506 if err != nil {
507 return err
508 }
509
510 return nil
511 })
512
513 runMigration(conn, "add-rkey-to-comments", func(tx *sql.Tx) error {
514 _, err := tx.Exec(`
515 alter table comments drop column comment_at;
516 alter table comments add column rkey text;
517 `)
518 return err
519 })
520
521 runMigration(conn, "add-deleted-and-edited-to-issue-comments", func(tx *sql.Tx) error {
522 _, err := tx.Exec(`
523 alter table comments add column deleted text; -- timestamp
524 alter table comments add column edited text; -- timestamp
525 `)
526 return err
527 })
528
529 runMigration(conn, "add-source-info-to-pulls-and-submissions", func(tx *sql.Tx) error {
530 _, err := tx.Exec(`
531 alter table pulls add column source_branch text;
532 alter table pulls add column source_repo_at text;
533 alter table pull_submissions add column source_rev text;
534 `)
535 return err
536 })
537
538 runMigration(conn, "add-source-to-repos", func(tx *sql.Tx) error {
539 _, err := tx.Exec(`
540 alter table repos add column source text;
541 `)
542 return err
543 })
544
545 // disable foreign-keys for the next migration
546 // NOTE: this cannot be done in a transaction, so it is run outside [0]
547 //
548 // [0]: https://sqlite.org/pragma.html#pragma_foreign_keys
549 conn.ExecContext(ctx, "pragma foreign_keys = off;")
550 runMigration(conn, "recreate-pulls-column-for-stacking-support", func(tx *sql.Tx) error {
551 _, err := tx.Exec(`
552 create table pulls_new (
553 -- identifiers
554 id integer primary key autoincrement,
555 pull_id integer not null,
556
557 -- at identifiers
558 repo_at text not null,
559 owner_did text not null,
560 rkey text not null,
561
562 -- content
563 title text not null,
564 body text not null,
565 target_branch text not null,
566 state integer not null default 0 check (state in (0, 1, 2, 3)), -- closed, open, merged, deleted
567
568 -- source info
569 source_branch text,
570 source_repo_at text,
571
572 -- stacking
573 stack_id text,
574 change_id text,
575 parent_change_id text,
576
577 -- meta
578 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
579
580 -- constraints
581 unique(repo_at, pull_id),
582 foreign key (repo_at) references repos(at_uri) on delete cascade
583 );
584
585 insert into pulls_new (
586 id, pull_id,
587 repo_at, owner_did, rkey,
588 title, body, target_branch, state,
589 source_branch, source_repo_at,
590 created
591 )
592 select
593 id, pull_id,
594 repo_at, owner_did, rkey,
595 title, body, target_branch, state,
596 source_branch, source_repo_at,
597 created
598 FROM pulls;
599
600 drop table pulls;
601 alter table pulls_new rename to pulls;
602 `)
603 return err
604 })
605 conn.ExecContext(ctx, "pragma foreign_keys = on;")
606
607 // run migrations
608 runMigration(conn, "add-spindle-to-repos", func(tx *sql.Tx) error {
609 tx.Exec(`
610 alter table repos add column spindle text;
611 `)
612 return nil
613 })
614
615 // drop all knot secrets, add unique constraint to knots
616 //
617 // knots will henceforth use service auth for signed requests
618 runMigration(conn, "no-more-secrets", func(tx *sql.Tx) error {
619 _, err := tx.Exec(`
620 create table registrations_new (
621 id integer primary key autoincrement,
622 domain text not null,
623 did text not null,
624 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
625 registered text,
626 read_only integer not null default 0,
627 unique(domain, did)
628 );
629
630 insert into registrations_new (id, domain, did, created, registered, read_only)
631 select id, domain, did, created, registered, 1 from registrations
632 where registered is not null;
633
634 drop table registrations;
635 alter table registrations_new rename to registrations;
636 `)
637 return err
638 })
639
640 // recreate and add rkey + created columns with default constraint
641 runMigration(conn, "rework-collaborators-table", func(tx *sql.Tx) error {
642 // create new table
643 // - repo_at instead of repo integer
644 // - rkey field
645 // - created field
646 _, err := tx.Exec(`
647 create table collaborators_new (
648 -- identifiers for the record
649 id integer primary key autoincrement,
650 did text not null,
651 rkey text,
652
653 -- content
654 subject_did text not null,
655 repo_at text not null,
656
657 -- meta
658 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
659
660 -- constraints
661 foreign key (repo_at) references repos(at_uri) on delete cascade
662 )
663 `)
664 if err != nil {
665 return err
666 }
667
668 // copy data
669 _, err = tx.Exec(`
670 insert into collaborators_new (id, did, rkey, subject_did, repo_at)
671 select
672 c.id,
673 r.did,
674 '',
675 c.did,
676 r.at_uri
677 from collaborators c
678 join repos r on c.repo = r.id
679 `)
680 if err != nil {
681 return err
682 }
683
684 // drop old table
685 _, err = tx.Exec(`drop table collaborators`)
686 if err != nil {
687 return err
688 }
689
690 // rename new table
691 _, err = tx.Exec(`alter table collaborators_new rename to collaborators`)
692 return err
693 })
694
695 runMigration(conn, "add-rkey-to-issues", func(tx *sql.Tx) error {
696 _, err := tx.Exec(`
697 alter table issues add column rkey text not null default '';
698
699 -- get last url section from issue_at and save to rkey column
700 update issues
701 set rkey = replace(issue_at, rtrim(issue_at, replace(issue_at, '/', '')), '');
702 `)
703 return err
704 })
705
706 // repurpose the read-only column to "needs-upgrade"
707 runMigration(conn, "rename-registrations-read-only-to-needs-upgrade", func(tx *sql.Tx) error {
708 _, err := tx.Exec(`
709 alter table registrations rename column read_only to needs_upgrade;
710 `)
711 return err
712 })
713
714 // require all knots to upgrade after the release of total xrpc
715 runMigration(conn, "migrate-knots-to-total-xrpc", func(tx *sql.Tx) error {
716 _, err := tx.Exec(`
717 update registrations set needs_upgrade = 1;
718 `)
719 return err
720 })
721
722 // require all knots to upgrade after the release of total xrpc
723 runMigration(conn, "migrate-spindles-to-xrpc-owner", func(tx *sql.Tx) error {
724 _, err := tx.Exec(`
725 alter table spindles add column needs_upgrade integer not null default 0;
726 `)
727 if err != nil {
728 return err
729 }
730
731 _, err = tx.Exec(`
732 update spindles set needs_upgrade = 1;
733 `)
734 return err
735 })
736
737 // remove issue_at from issues and replace with generated column
738 //
739 // this requires a full table recreation because stored columns
740 // cannot be added via alter
741 //
742 // couple other changes:
743 // - columns renamed to be more consistent
744 // - adds edited and deleted fields
745 //
746 // disable foreign-keys for the next migration
747 conn.ExecContext(ctx, "pragma foreign_keys = off;")
748 runMigration(conn, "remove-issue-at-from-issues", func(tx *sql.Tx) error {
749 _, err := tx.Exec(`
750 create table if not exists issues_new (
751 -- identifiers
752 id integer primary key autoincrement,
753 did text not null,
754 rkey text not null,
755 at_uri text generated always as ('at://' || did || '/' || 'sh.tangled.repo.issue' || '/' || rkey) stored,
756
757 -- at identifiers
758 repo_at text not null,
759
760 -- content
761 issue_id integer not null,
762 title text not null,
763 body text not null,
764 open integer not null default 1,
765 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
766 edited text, -- timestamp
767 deleted text, -- timestamp
768
769 unique(did, rkey),
770 unique(repo_at, issue_id),
771 unique(at_uri),
772 foreign key (repo_at) references repos(at_uri) on delete cascade
773 );
774 `)
775 if err != nil {
776 return err
777 }
778
779 // transfer data
780 _, err = tx.Exec(`
781 insert into issues_new (id, did, rkey, repo_at, issue_id, title, body, open, created)
782 select
783 i.id,
784 i.owner_did,
785 i.rkey,
786 i.repo_at,
787 i.issue_id,
788 i.title,
789 i.body,
790 i.open,
791 i.created
792 from issues i;
793 `)
794 if err != nil {
795 return err
796 }
797
798 // drop old table
799 _, err = tx.Exec(`drop table issues`)
800 if err != nil {
801 return err
802 }
803
804 // rename new table
805 _, err = tx.Exec(`alter table issues_new rename to issues`)
806 return err
807 })
808 conn.ExecContext(ctx, "pragma foreign_keys = on;")
809
810 // - renames the comments table to 'issue_comments'
811 // - rework issue comments to update constraints:
812 // * unique(did, rkey)
813 // * remove comment-id and just use the global ID
814 // * foreign key (repo_at, issue_id)
815 // - new columns
816 // * column "reply_to" which can be any other comment
817 // * column "at-uri" which is a generated column
818 runMigration(conn, "rework-issue-comments", func(tx *sql.Tx) error {
819 _, err := tx.Exec(`
820 create table if not exists issue_comments (
821 -- identifiers
822 id integer primary key autoincrement,
823 did text not null,
824 rkey text,
825 at_uri text generated always as ('at://' || did || '/' || 'sh.tangled.repo.issue.comment' || '/' || rkey) stored,
826
827 -- at identifiers
828 issue_at text not null,
829 reply_to text, -- at_uri of parent comment
830
831 -- content
832 body text not null,
833 created text not null default (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
834 edited text,
835 deleted text,
836
837 -- constraints
838 unique(did, rkey),
839 unique(at_uri),
840 foreign key (issue_at) references issues(at_uri) on delete cascade
841 );
842 `)
843 if err != nil {
844 return err
845 }
846
847 // transfer data
848 _, err = tx.Exec(`
849 insert into issue_comments (id, did, rkey, issue_at, body, created, edited, deleted)
850 select
851 c.id,
852 c.owner_did,
853 c.rkey,
854 i.at_uri, -- get at_uri from issues table
855 c.body,
856 c.created,
857 c.edited,
858 c.deleted
859 from comments c
860 join issues i on c.repo_at = i.repo_at and c.issue_id = i.issue_id;
861 `)
862 if err != nil {
863 return err
864 }
865
866 // drop old table
867 _, err = tx.Exec(`drop table comments`)
868 return err
869 })
870
871 return &DB{db}, nil
872}
873
874type migrationFn = func(*sql.Tx) error
875
876func runMigration(c *sql.Conn, name string, migrationFn migrationFn) error {
877 tx, err := c.BeginTx(context.Background(), nil)
878 if err != nil {
879 return err
880 }
881 defer tx.Rollback()
882
883 var exists bool
884 err = tx.QueryRow("select exists (select 1 from migrations where name = ?)", name).Scan(&exists)
885 if err != nil {
886 return err
887 }
888
889 if !exists {
890 // run migration
891 err = migrationFn(tx)
892 if err != nil {
893 log.Printf("Failed to run migration %s: %v", name, err)
894 return err
895 }
896
897 // mark migration as complete
898 _, err = tx.Exec("insert into migrations (name) values (?)", name)
899 if err != nil {
900 log.Printf("Failed to mark migration %s as complete: %v", name, err)
901 return err
902 }
903
904 // commit the transaction
905 if err := tx.Commit(); err != nil {
906 return err
907 }
908
909 log.Printf("migration %s applied successfully", name)
910 } else {
911 log.Printf("skipped migration %s, already applied", name)
912 }
913
914 return nil
915}
916
917func (d *DB) Close() error {
918 return d.DB.Close()
919}
920
921type filter struct {
922 key string
923 arg any
924 cmp string
925}
926
927func newFilter(key, cmp string, arg any) filter {
928 return filter{
929 key: key,
930 arg: arg,
931 cmp: cmp,
932 }
933}
934
935func FilterEq(key string, arg any) filter { return newFilter(key, "=", arg) }
936func FilterNotEq(key string, arg any) filter { return newFilter(key, "<>", arg) }
937func FilterGte(key string, arg any) filter { return newFilter(key, ">=", arg) }
938func FilterLte(key string, arg any) filter { return newFilter(key, "<=", arg) }
939func FilterIs(key string, arg any) filter { return newFilter(key, "is", arg) }
940func FilterIsNot(key string, arg any) filter { return newFilter(key, "is not", arg) }
941func FilterIn(key string, arg any) filter { return newFilter(key, "in", arg) }
942
943func (f filter) Condition() string {
944 rv := reflect.ValueOf(f.arg)
945 kind := rv.Kind()
946
947 // if we have `FilterIn(k, [1, 2, 3])`, compile it down to `k in (?, ?, ?)`
948 if (kind == reflect.Slice && rv.Type().Elem().Kind() != reflect.Uint8) || kind == reflect.Array {
949 if rv.Len() == 0 {
950 // always false
951 return "1 = 0"
952 }
953
954 placeholders := make([]string, rv.Len())
955 for i := range placeholders {
956 placeholders[i] = "?"
957 }
958
959 return fmt.Sprintf("%s %s (%s)", f.key, f.cmp, strings.Join(placeholders, ", "))
960 }
961
962 return fmt.Sprintf("%s %s ?", f.key, f.cmp)
963}
964
965func (f filter) Arg() []any {
966 rv := reflect.ValueOf(f.arg)
967 kind := rv.Kind()
968 if (kind == reflect.Slice && rv.Type().Elem().Kind() != reflect.Uint8) || kind == reflect.Array {
969 if rv.Len() == 0 {
970 return nil
971 }
972
973 out := make([]any, rv.Len())
974 for i := range rv.Len() {
975 out[i] = rv.Index(i).Interface()
976 }
977 return out
978 }
979
980 return []any{f.arg}
981}