Code

top / src / renderer

src/renderer/app.js · 59.6 KB · raw

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
      
'use strict';

// ---------------------------------------------------------------------------
// Handles
// ---------------------------------------------------------------------------

const $ = (id) => document.getElementById(id);

const els = {
  blocker: $('blocker'),
  blockerBody: $('blocker-body'),

  tabAll: $('tab-all'),
  viewAll: $('view-all'),
  viewJob: $('view-job'),
  eyeAllBody: $('eye-all-body'),

  filterAll: $('filter-all'),
  allList: $('all-list'),
  allEmpty: $('all-empty'),
  allLoading: $('all-loading'),
  allTally: $('all-tally'),
  allHint: $('all-hint'),
  allSelectAll: $('all-select-all'),
  allSelectNone: $('all-select-none'),
  allToMine: $('all-to-mine'),

  runningWarning: $('running-warning'),
  runningWarningText: $('running-warning-text'),
  closeRunning: $('close-running'),
  recheckRunning: $('recheck-running'),
  mineBackup: $('mine-backup'),

  tabMine: $('tab-mine'),
  viewMine: $('view-mine'),
  eyeMineBody: $('eye-mine-body'),
  flathubWarning: $('flathub-warning'),
  addFlathub: $('add-flathub'),
  mineSearch: $('mine-search'),
  mineResults: $('mine-results'),
  mineFromInstalled: $('mine-from-installed'),
  mineForget: $('mine-forget'),
  mineImport: $('mine-import'),
  mineExport: $('mine-export'),
  mineList: $('mine-list'),
  mineEmpty: $('mine-empty'),
  mineTally: $('mine-tally'),
  mineHint: $('mine-hint'),
  mineAll: $('mine-all'),
  mineAllLabel: $('mine-all-label'),

  tabRestore: $('tab-restore'),
  viewRestore: $('view-restore'),
  restoreOpen: $('restore-open'),
  restoreSourceText: $('restore-source-text'),
  restoreNote: $('restore-note'),
  restoreColhead: $('restore-colhead'),
  restoreAll: $('restore-all'),
  restoreAllLabel: $('restore-all-label'),
  restoreList: $('restore-list'),
  restoreTally: $('restore-tally'),
  restoreHint: $('restore-hint'),
  restoreGo: $('restore-go'),

  mineFullHelp: $('mine-full-help'),
  helpOpen: $('help-open'),
  helpClose: $('help-close'),
  helpNext: $('help-next'),
  viewHelp: $('view-help'),
  helpScroll: $('help-scroll'),

  jobHead: $('job-head'),
  jobCount: $('job-count'),
  jobProgressWrap: $('job-progress-wrap'),
  jobProgressFill: $('job-progress-fill'),
  jobLine: $('job-line'),
  jobList: $('job-list'),
  jobFootbar: $('job-footbar'),
  jobSummary: $('job-summary'),
  jobSummaryHint: $('job-summary-hint'),
  jobReveal: $('job-reveal'),
  jobDone: $('job-done'),

  updateWidgetVersion: $('update-widget-version'),
  updateDot: $('update-dot'),
  updateDotRingFill: $('update-dot-ring-fill'),
};

const state = {
  mode: 'all',
  // Every Flatpak app on this machine, and which of them are ticked on the
  // All apps tab.
  apps: [],
  allTicked: new Set(),
  running: [],
  // Set once Back up settings has been pressed and something was open: the
  // warning shows from then until it is dealt with, and not before.
  backupBlocked: false,
  jobRows: new Map(),
  lastBackupFile: null,
  mine: [],
  mineNever: new Set(),
  // The entries themselves, so a tick follows its row through a re-render.
  mineTicked: new Set(),
  // The backup open on the Restore tab, and what is ticked and switched there.
  restore: null,
  restoreTicked: new Set(),
  restoreKeep: new Map(),
};

// ---------------------------------------------------------------------------
// Small helpers
// ---------------------------------------------------------------------------

function formatBytes(bytes) {
  if (!bytes) return '—';
  const units = ['B', 'KB', 'MB', 'GB', 'TB'];
  let value = bytes;
  let unit = 0;
  while (value >= 1024 && unit < units.length - 1) { value /= 1024; unit += 1; }
  const decimals = value >= 100 || unit === 0 ? 0 : 1;
  return `${value.toFixed(decimals)} ${units[unit]}`;
}

function plural(count, one, many) {
  return `${count} ${count === 1 ? one : many}`;
}

// Saying something happened, in the line under the tally where the screen
// already explains itself. Not a coloured pill floating over the buttons:
// that one covered a control for as long as it was up, and it took the
// answer away again before it could be read twice.
const SAID_MS = 5000;
const saidTimers = new WeakMap();

function say(el, message) {
  if (!el) return;
  clearTimeout(saidTimers.get(el));
  if (!el.dataset.resting) el.dataset.resting = el.textContent;
  el.textContent = message;
  el.classList.add('is-said');
  saidTimers.set(el, setTimeout(() => {
    el.classList.remove('is-said');
    el.textContent = el.dataset.resting || '';
    delete el.dataset.resting;
  }, SAID_MS));
}

function setHint(el, text) {
  if (el.classList.contains('is-said')) el.dataset.resting = text;
  else el.textContent = text;
}

// The Morphic Button gesture. The first click arms and shows a tick; a
// second click inside three seconds acts; silence stands it back down. No
// dialog and no success message — the button is the whole conversation.
function arming(button, label, act) {
  let armed = false;
  let timer = null;
  const rest = () => {
    armed = false;
    clearTimeout(timer);
    button.classList.remove('is-armed', 'is-error');
    button.textContent = label;
  };
  button.addEventListener('click', async () => {
    if (button.disabled) return;
    if (!armed) {
      armed = true;
      button.classList.add('is-armed');
      button.textContent = '✓';
      button.title = 'Click again to go ahead';
      timer = setTimeout(rest, 3000);
      return;
    }
    clearTimeout(timer);
    armed = false;
    button.classList.remove('is-armed');
    button.textContent = label;
    const result = await act();
    if (result === false) {
      button.classList.add('is-error');
      setTimeout(rest, 2500);
    }
  });
  return { rest };
}

// ---------------------------------------------------------------------------
// Tooltips
// ---------------------------------------------------------------------------

// Every `title` in the window becomes the same light bubble, rather than the
// system's own, which looks different on every desktop and sits there for as
// long as the pointer does. The title is moved to data-tip on first hover so
// the system one never appears; anything that sets a title later is picked up
// the next time round.
const TIP_DELAY_MS = 400;
const TIP_SHOWN_MS = 1800;
const tip = document.getElementById('tip');
let tipTarget = null;
let tipShowTimer = null;
let tipHideTimer = null;

function tipTextOf(el) {
  if (typeof el.tipText === 'function') return el.tipText();
  return el.dataset.tip || '';
}

function hideTip() {
  clearTimeout(tipShowTimer);
  clearTimeout(tipHideTimer);
  tip.hidden = true;
  tipTarget = null;
}

function placeTip(el) {
  const text = tipTextOf(el);
  if (!text) return;
  tip.textContent = text;
  tip.hidden = false;
  const box = el.getBoundingClientRect();
  const size = tip.getBoundingClientRect();
  const gap = 8;
  // Above if it fits, otherwise below: it never runs off the top.
  const above = box.top - size.height - gap >= 4;
  const top = above ? box.top - size.height - gap : box.bottom + gap;
  const centre = box.left + box.width / 2;
  const left = Math.max(4, Math.min(window.innerWidth - size.width - 4, centre - size.width / 2));
  tip.style.top = `${Math.round(top)}px`;
  tip.style.left = `${Math.round(left)}px`;
  // The arrow still points at the thing, even when the bubble has had to
  // shift sideways to stay on screen.
  tip.style.setProperty('--arrow-x', `${Math.round(Math.max(10, Math.min(size.width - 10, centre - left)))}px`);
  tip.dataset.side = above ? 'above' : 'below';
  tipHideTimer = setTimeout(hideTip, TIP_SHOWN_MS);
}

document.addEventListener('mouseover', (event) => {
  const el = event.target.closest('[title], [data-tip], .has-tip');
  if (!el || el === tipTarget) return;
  if (el.hasAttribute('title')) {
    el.dataset.tip = el.getAttribute('title');
    el.removeAttribute('title');
  }
  hideTip();
  tipTarget = el;
  tipShowTimer = setTimeout(() => { if (tipTarget === el) placeTip(el); }, TIP_DELAY_MS);
});

document.addEventListener('mouseout', (event) => {
  if (tipTarget && !tipTarget.contains(event.relatedTarget)) hideTip();
});
document.addEventListener('mousedown', hideTip);
document.addEventListener('scroll', hideTip, true);
window.addEventListener('blur', hideTip);

// For a tooltip whose words change with the state of the thing, like the
// update dot's: read at the moment it shows.
function brief(el, text) {
  if (typeof text === 'function') {
    el.tipText = text;
    el.classList.add('has-tip');
  } else {
    el.dataset.tip = text;
    el.setAttribute('aria-label', text);
  }
}

// ---------------------------------------------------------------------------
// The i
// ---------------------------------------------------------------------------

// The body sits outside the <details> so it can be a flex child of the panel
// rather than trapped in the heading row. The details still owns the state.
function wireEye(detailsEl, bodyEl) {
  detailsEl.addEventListener('toggle', () => { bodyEl.hidden = !detailsEl.open; });
}
wireEye(document.querySelector('#view-all .eye'), els.eyeAllBody);
wireEye(document.querySelector('#view-mine .eye'), els.eyeMineBody);

// ---------------------------------------------------------------------------
// Views
// ---------------------------------------------------------------------------

const TABS = {
  all: { tab: els.tabAll, view: els.viewAll },
  mine: { tab: els.tabMine, view: els.viewMine },
  restore: { tab: els.tabRestore, view: els.viewRestore },
};

function showView(name) {
  for (const [key, pair] of Object.entries(TABS)) {
    pair.view.hidden = key !== name;
  }
  els.viewJob.hidden = name !== 'job';
  els.viewHelp.hidden = name !== 'help';
  els.helpOpen.classList.toggle('is-on', name === 'help');
  if (name === 'help') {
    for (const pair of Object.values(TABS)) {
      pair.tab.classList.remove('is-on');
      pair.tab.setAttribute('aria-selected', 'false');
    }
    return;
  }
  if (!TABS[name]) return;
  // `mode` is where a finished job sends the user back to.
  state.mode = name;
  for (const [key, pair] of Object.entries(TABS)) {
    pair.tab.classList.toggle('is-on', key === name);
    pair.tab.setAttribute('aria-selected', String(key === name));
  }
}

for (const [key, pair] of Object.entries(TABS)) {
  pair.tab.addEventListener('click', () => {
    // Looked at afresh on arrival, so a tab never shows what was true
    // before something changed on another one.
    if (key === 'all' && state.apps.length) { renderAllList(); updateAllTally(); }
    if (key === 'mine') renderMine();
    showView(key);
  });
}

// Help shows one topic at a time. It opens on the first, or on the one a
// "Full" heading or similar points to; closing it goes back to whichever tab
// it was opened from.
const HELP_SECTIONS = [...document.querySelectorAll('.help-section')].map((el) => el.id);
let helpAt = HELP_SECTIONS[0];

function showHelp(sectionId) {
  helpAt = HELP_SECTIONS.includes(sectionId) ? sectionId : HELP_SECTIONS[0];
  for (const id of HELP_SECTIONS) document.getElementById(id).hidden = id !== helpAt;
  for (const link of document.querySelectorAll('.help-jump a')) {
    link.setAttribute('aria-current', String(link.getAttribute('href') === `#${helpAt}`));
  }
  const next = HELP_SECTIONS[HELP_SECTIONS.indexOf(helpAt) + 1];
  els.helpNext.hidden = !next;
  if (next) {
    const label = document.querySelector(`.help-jump a[href="#${next}"]`);
    els.helpNext.textContent = `Next: ${label ? label.textContent : ''}`;
  }
  els.helpScroll.scrollTop = 0;
  showView('help');
}

els.helpOpen.addEventListener('click', () => {
  if (!els.viewHelp.hidden) showView(state.mode);
  else showHelp();
});
els.helpClose.addEventListener('click', () => showView(state.mode));
els.helpNext.addEventListener('click', () => {
  showHelp(HELP_SECTIONS[HELP_SECTIONS.indexOf(helpAt) + 1]);
});
document.addEventListener('keydown', (event) => {
  if (event.key === 'Escape' && !els.viewHelp.hidden) showView(state.mode);
});
els.mineFullHelp.addEventListener('click', () => showHelp('help-full'));
// The contents links jump within the page rather than navigating anywhere.
for (const link of document.querySelectorAll('.help-jump a')) {
  link.addEventListener('click', (event) => {
    event.preventDefault();
    showHelp(link.getAttribute('href').slice(1));
  });
}

// The tray menu names a destination. A job on screen is not interrupted for
// it: it finishes and lands the user back where they asked to be.
window.flat.onGoToTab((tab) => {
  if (tab === 'help') {
    if (els.viewJob.hidden) showHelp();
    return;
  }
  if (!TABS[tab]) return;
  state.mode = tab;
  if (els.viewJob.hidden) showView(tab);
});

// ---------------------------------------------------------------------------
// Rows
// ---------------------------------------------------------------------------

// A small, quiet tick beside a name, standing for one plain fact ("installed
// here", "on My apps"). It replaces the coloured pills this used to carry:
// the fact is worth knowing, not worth shouting. The words are in its
// tooltip and its accessible name, so it never relies on the shape alone.
function quietTick(label) {
  const mark = document.createElement('span');
  mark.className = 'quiet-tick';
  if (!label) {
    mark.setAttribute('aria-hidden', 'true');
    return mark;
  }
  mark.title = label;
  mark.setAttribute('role', 'img');
  mark.setAttribute('aria-label', label);
  mark.innerHTML = '<svg viewBox="0 0 16 16" width="14" height="14" aria-hidden="true">'
    + '<path d="M3.5 8.5 6.5 11.5 12.5 4.5" fill="none" stroke="currentColor" stroke-width="1.6" '
    + 'stroke-linecap="round" stroke-linejoin="round"/></svg>';
  return mark;
}

function makeRow({ id, name, icon, sizeText, tick, title, checked, onToggle }) {
  const li = document.createElement('li');
  li.className = 'row';
  li.dataset.id = id;
  li.dataset.search = `${name} ${id}`.toLowerCase();

  const box = document.createElement('input');
  box.type = 'checkbox';
  box.checked = checked;
  box.setAttribute('aria-label', `Include ${name}`);
  box.addEventListener('change', () => onToggle(box.checked));
  li.appendChild(box);

  if (icon) {
    const img = document.createElement('img');
    img.className = 'row-icon';
    img.src = icon;
    img.alt = '';
    li.appendChild(img);
  } else {
    const blank = document.createElement('span');
    blank.className = 'row-icon row-icon--blank';
    blank.textContent = (name[0] || '?').toUpperCase();
    blank.setAttribute('aria-hidden', 'true');
    li.appendChild(blank);
  }

  li.appendChild(quietTick(tick));

  const text = document.createElement('div');
  text.className = 'row-text';
  const nameEl = document.createElement('div');
  nameEl.className = 'row-name';
  nameEl.textContent = name;
  const idEl = document.createElement('div');
  idEl.className = 'row-id';
  idEl.textContent = id;
  text.append(nameEl, idEl);
  li.appendChild(text);


  const size = document.createElement('div');
  size.className = 'row-size';
  size.textContent = sizeText;
  li.appendChild(size);

  // The whole row is the hit target, not just the 18px box.
  li.addEventListener('click', (event) => {
    if (event.target === box) return;
    box.checked = !box.checked;
    onToggle(box.checked);
  });

  if (title) li.title = title;
  return li;
}

function applyFilter(listEl, query) {
  const needle = query.trim().toLowerCase();
  for (const li of listEl.children) {
    li.hidden = needle ? !li.dataset.search.includes(needle) : false;
  }
}

// ---------------------------------------------------------------------------
// All apps: everything installed on this machine
// ---------------------------------------------------------------------------

// An app installed on this machine that has saved nothing outside its
// cache. Only knowable for apps that are here: for an app on the list but
// not on this machine, nobody can say, so it keeps its switch.
function noSettingsHere(id) {
  const app = state.apps.find((a) => a.id === (id || '').trim());
  return Boolean(app) && !app.hasSettings;
}

// Keep settings as it actually works out. An app with nothing to keep is
// Fresh whatever its switch last said. An app with settings on this machine
// keeps them unless someone has switched that off. An app that is not on
// this machine keeps whatever it was last set to.
function keeps(entry) {
  if (noSettingsHere(entry.id)) return false;
  if (entry.keepChosen) return Boolean(entry.keep);
  const app = state.apps.find((a) => a.id === (entry.id || '').trim());
  if (app && app.hasSettings) return true;
  return Boolean(entry.keep);
}

// Settings bigger than this are shown in amber: not wrong, just worth a
// second look before carrying them to another machine.
const HEAVY_BYTES = 250 * 1024 * 1024;

function sizeCell(bytes, known) {
  const cell = document.createElement('span');
  cell.className = 'cell--size';
  if (!known) {
    cell.textContent = '—';
    cell.title = 'Not on this machine, so there is nothing here to measure';
    return cell;
  }
  cell.textContent = bytes ? formatBytes(bytes) : '—';
  cell.title = 'Size of its settings and data, not counting its cache';
  if (bytes >= HEAVY_BYTES) {
    cell.classList.add('is-heavy');
    cell.title += '. Large enough to think about whether it needs to come along';
  }
  return cell;
}

// What an app's settings come to, as it is set to be backed up.
function chosenBytes(entry, app) {
  if (!app || !app.hasSettings) return 0;
  return entry.full ? app.fullBytes : app.dataBytes;
}

function onMineIds() {
  return new Set(state.mine.map((e) => (e.id || '').trim()).filter(Boolean));
}

function renderAllList() {
  els.allList.textContent = '';
  const onMine = onMineIds();
  for (const app of state.apps) {
    const row = makeRow({
      id: app.id,
      name: app.name,
      icon: app.icon,
      sizeText: app.hasSettings ? formatBytes(app.dataBytes) : 'No settings',
      tick: onMine.has(app.id) ? 'On My apps' : null,
      title: app.hasSettings ? 'Size of the settings and data it keeps' : 'Has saved nothing yet, so it would only ever install fresh',
      checked: state.allTicked.has(app.id),
      onToggle: (on) => {
        if (on) state.allTicked.add(app.id);
        else state.allTicked.delete(app.id);
        updateAllTally();
      },
    });
    els.allList.appendChild(row);
  }
  els.allEmpty.hidden = state.apps.length > 0;
  applyFilter(els.allList, els.filterAll.value);
}

function updateAllTally() {
  const ticked = state.apps.filter((a) => state.allTicked.has(a.id));
  const already = ticked.filter((a) => onMineIds().has(a.id)).length;
  els.allTally.textContent = ticked.length
    ? `${plural(ticked.length, 'app', 'apps')} ticked`
    : `${plural(state.apps.length, 'app', 'apps')} on this machine`;
  // What the button is about to do, on the page rather than behind the i.
  let hint = 'Tick the apps you want on My apps.';
  if (ticked.length && already === ticked.length) {
    hint = ticked.length === 1 ? 'That one is on My apps already.' : 'All of those are on My apps already.';
  } else if (already) {
    hint = `${already} of them ${already === 1 ? 'is' : 'are'} on My apps already. The rest arrive there as Fresh installs.`;
  } else if (ticked.length) {
    hint = 'They arrive on My apps as Fresh installs. Choose which keep their settings there.';
  }
  setHint(els.allHint, hint);
  els.allToMine.disabled = ticked.length === 0;
}

async function scanApps() {
  els.allLoading.hidden = false;
  els.allLoading.textContent = 'Looking at what is installed…';
  els.allList.textContent = '';

  // Sizes here are without caches: they are what the app keeps, and the
  // cache switch only matters to the backup, on My apps.
  const result = await window.flat.scanApps();
  els.allLoading.hidden = true;

  if (!result.ok) {
    els.allEmpty.hidden = false;
    els.allEmpty.textContent = result.error || 'Flatpak could not list what is installed.';
    return;
  }

  state.apps = result.apps;
  state.running = result.running || [];
  state.allTicked = new Set([...state.allTicked].filter((id) => result.apps.some((a) => a.id === id)));
  renderAllList();
  updateAllTally();
  if (state.mine.length) renderMine();
  updateMineTally();
}

window.flat.onScanProgress(({ done, total }) => {
  if (!els.allLoading.hidden) {
    els.allLoading.textContent = `Measuring what each app is holding… ${done} of ${total}`;
  }
});

els.filterAll.addEventListener('input', () => applyFilter(els.allList, els.filterAll.value));

// All means all: every app on the machine, data or not. With a filter typed
// in, it means every app the filter is showing, because ticking rows you
// cannot see is a surprise waiting to happen.
els.allSelectAll.addEventListener('click', () => {
  const visible = [...els.allList.children].filter((li) => !li.hidden).map((li) => li.dataset.id);
  for (const id of visible) state.allTicked.add(id);
  renderAllList(); updateAllTally();
});
els.allSelectNone.addEventListener('click', () => {
  state.allTicked = new Set();
  renderAllList(); updateAllTally();
});

els.allToMine.addEventListener('click', async () => {
  const chosen = state.apps.filter((a) => state.allTicked.has(a.id));
  if (!chosen.length) return;
  // Ticking an app and pressing Add is naming it on purpose, so it comes
  // across even if it was once removed from the list.
  const { added } = await addBatchToMine(
    chosen.map((a) => ({ id: a.id, name: a.name, remote: a.origin || 'flathub', installed: true })),
    'All apps',
    { explicit: true },
  );
  state.allTicked = new Set();
  renderAllList();
  updateAllTally();
  say(els.allHint, added
    ? `${plural(added, 'app', 'apps')} added to My apps as Fresh installs.`
    : 'Those are all on My apps already.');
});

// ---------------------------------------------------------------------------
// Backing up the Keep settings apps, from My apps
// ---------------------------------------------------------------------------

// The Keep settings apps that can actually be backed up here: on this
// machine, and holding something to back up.
function tickedWanted() {
  return uniqueWanted().filter((e) => state.mineTicked.has(e));
}

function keepAppsHere() {
  const keep = new Set(tickedWanted().filter(keeps).map((e) => e.id));
  return state.apps.filter((a) => keep.has(a.id) && a.hasSettings);
}

function openKeepApps() {
  const ids = new Set(keepAppsHere().map((a) => a.id));
  return state.running.filter((id) => ids.has(id));
}

function nameOf(id) {
  return (state.apps.find((a) => a.id === id) || {}).name || id;
}

// Shown only once a backup has been asked for and something was open, and
// then until it is dealt with. Before that it would be nagging about apps
// nobody is trying to back up yet.
function updateRunningWarning() {
  const clash = state.backupBlocked ? openKeepApps() : [];
  if (!clash.length) {
    if (state.backupBlocked && !els.runningWarning.hidden) {
      say(els.mineHint, 'Everything is closed now. Press Back up settings again.');
    }
    state.backupBlocked = false;
    els.runningWarning.hidden = true;
    return;
  }
  const names = clash.map(nameOf);
  els.runningWarningText.textContent = names.length === 1
    ? `Please close ${names[0]} before backing up.`
    : `Please close ${names.slice(0, -1).join(', ')} and ${names[names.length - 1]} before backing up.`;
  els.runningWarning.hidden = false;
}

// Looks again at what is running: when asked, when the window comes back
// into focus after you have been off closing something, and every few
// seconds while the warning is up.
async function recheckRunning({ quiet = false } = {}) {
  const before = openKeepApps();
  state.running = await window.flat.runningApps();
  const still = openKeepApps();
  updateRunningWarning();
  if (quiet) return;
  const closed = before.filter((id) => !still.includes(id)).map(nameOf);
  if (still.length) {
    say(els.mineHint, `Still open: ${still.map(nameOf).join(', ')}. Some apps keep running in the background after their window closes.`);
  } else if (closed.length) {
    say(els.mineHint, `${closed.join(', ')} ${closed.length === 1 ? 'is' : 'are'} closed now. Press Back up settings again.`);
  }
}

els.recheckRunning.addEventListener('click', () => recheckRunning());

window.addEventListener('focus', () => {
  if (!els.runningWarning.hidden) recheckRunning({ quiet: true });
});

setInterval(() => {
  if (!els.runningWarning.hidden) recheckRunning({ quiet: true });
}, 4000);

arming(els.closeRunning, 'Close them for me', async () => {
  const result = await window.flat.closeApps(openKeepApps());
  state.running = await window.flat.runningApps();
  updateRunningWarning();
  return result.ok;
});

els.mineBackup.addEventListener('click', async () => {
  const list = tickedWanted();
  if (!list.length) {
    say(els.mineHint, 'Tick the apps you want to take with you.');
    return;
  }
  const keeping = list.filter(keeps);
  const here = keepAppsHere();

  // Not a step further while any app whose settings are going is open.
  state.running = await window.flat.runningApps();
  state.backupBlocked = true;
  updateRunningWarning();
  if (!els.runningWarning.hidden) return;

  const target = await window.flat.chooseBackupFile();
  if (target.canceled) return;

  // The rows are the apps whose settings are being packed; the rest of the
  // list goes into the file as names, which takes no time worth showing.
  startJob('Backing up', here.map((a) => ({ id: a.id, name: a.name })));
  const result = await window.flat.runBackup({
    apps: here.map((a) => {
      const entry = list.find((e) => e.id === a.id) || {};
      return {
        id: a.id, name: a.name, branch: a.branch, arch: a.arch,
        origin: a.origin, scope: a.scope,
        full: Boolean(entry.full),
        dataBytes: chosenBytes(entry, a),
      };
    }),
    list: list.map(({ id, name, remote }) => ({ id, name, remote })),
    outFile: target.file,
  });

  if (!result.ok) {
    finishJob({ head: 'Backup failed', summary: result.error, bad: true });
    return;
  }

  state.lastBackupFile = result.file;
  for (const entry of result.log || []) noteOnJobRow(entry.message, entry.level);

  // Keep settings apps that could not be packed are named, not dropped
  // silently: on the new machine they would come back fresh.
  const left = keeping.length - here.length;
  finishJob({
    head: 'Backup finished',
    summary: `${plural(list.length, 'app', 'apps')} saved · ${plural(result.apps, 'with settings', 'with settings')} · ${formatBytes(result.bytes)}`,
    hint: left
      ? `${plural(left, 'Keep settings app is', 'Keep settings apps are')} not on this machine, so ${left === 1 ? 'it goes' : 'they go'} in as a fresh install. ${result.file}`
      : result.file,
    reveal: true,
  });
});

// ---------------------------------------------------------------------------
// The job view
// ---------------------------------------------------------------------------

function startJob(head, apps) {
  els.jobHead.textContent = head;
  els.jobCount.textContent = '';
  els.jobList.textContent = '';
  els.jobFootbar.hidden = true;
  els.jobReveal.hidden = true;
  els.jobProgressWrap.hidden = false;
  els.jobProgressFill.style.width = '0%';
  els.jobLine.textContent = 'Starting…';
  state.jobRows = new Map();

  for (const app of apps) {
    const li = document.createElement('li');
    li.className = 'jobrow';
    li.dataset.state = 'waiting';

    const mark = document.createElement('span');
    mark.className = 'jobrow-mark';
    mark.textContent = '·';

    const text = document.createElement('div');
    text.className = 'jobrow-text';
    const name = document.createElement('div');
    name.className = 'jobrow-name';
    name.textContent = app.name;
    text.appendChild(name);

    li.append(mark, text);
    els.jobList.appendChild(li);
    state.jobRows.set(app.id, { li, mark, text });
  }

  showView('job');
}

function markJobRow(id, kind, message) {
  const row = state.jobRows.get(id);
  if (!row) return;
  row.li.dataset.state = kind;
  row.mark.textContent = kind === 'ok' ? '✓' : kind === 'failed' ? '!' : '·';
  if (message) {
    const note = document.createElement('div');
    note.className = kind === 'failed' ? 'jobrow-note jobrow-note--bad' : 'jobrow-note';
    note.textContent = message;
    row.text.appendChild(note);
  }
}

function addJobNote(id, text, bad) {
  const row = state.jobRows.get(id);
  if (!row) return;
  const note = document.createElement('div');
  note.className = bad ? 'jobrow-note jobrow-note--bad' : 'jobrow-note';
  note.textContent = text;
  row.text.appendChild(note);
}

// A row that has already been given a note must not collect a second one
// saying the same thing when the final results arrive.
function noteOnce(id, kind, message) {
  const row = state.jobRows.get(id);
  if (!row || row.noted) return;
  row.noted = true;
  markJobRow(id, kind, message);
}

// A note with no id belongs to whichever row is on screen last — used for
// the backup log, which is a flat list of warnings rather than per app.
function noteOnJobRow(message, level, id) {
  if (id) {
    const row = state.jobRows.get(id);
    if (row) {
      const note = document.createElement('div');
      note.className = 'jobrow-note';
      note.textContent = message;
      row.text.appendChild(note);
      return;
    }
  }
  const li = document.createElement('li');
  li.className = 'jobrow';
  li.dataset.state = level === 'error' ? 'failed' : 'waiting';
  const mark = document.createElement('span');
  mark.className = 'jobrow-mark';
  mark.textContent = level === 'error' ? '!' : 'i';
  const text = document.createElement('div');
  text.className = 'jobrow-text';
  const note = document.createElement('div');
  note.className = level === 'error' ? 'jobrow-note jobrow-note--bad' : 'jobrow-note';
  note.textContent = message;
  text.appendChild(note);
  li.append(mark, text);
  els.jobList.appendChild(li);
}

window.flat.onJobProgress(({ index, total, appId, step, message }) => {
  if (total) {
    const settled = step === 'done' || step === 'failed' || step === 'skipped';
    const fraction = Math.min(1, (index + (settled ? 1 : 0.5)) / total);
    els.jobProgressFill.style.width = `${Math.round(fraction * 100)}%`;
    els.jobCount.textContent = `${Math.min(index + 1, total)} of ${total}`;
  }
  els.jobLine.textContent = message || '';
  if (!appId) return;
  const row = state.jobRows.get(appId);
  if (!row) return;
  if (step === 'done') markJobRow(appId, 'ok');
  else if (step === 'failed') noteOnce(appId, 'failed', message);
  else if (step === 'skipped') noteOnce(appId, 'skipped', 'Already here, so it was left alone');
  // The settings pass runs on apps already installed and ticked green. It
  // shows as working while it runs and goes back to its tick after; the
  // outcome is added as a note once the run has finished.
  else if (step === 'settings') row.li.dataset.state = 'working';
  else if (step === 'settings-done' || step === 'settings-failed') row.li.dataset.state = 'ok';
  else row.li.dataset.state = 'working';
});

function finishJob({ head, summary, hint, reveal, bad }) {
  els.jobHead.textContent = head;
  els.jobProgressFill.style.width = '100%';
  els.jobProgressWrap.hidden = true;
  els.jobSummary.textContent = summary || '';
  els.jobSummaryHint.textContent = hint || '';
  els.jobReveal.hidden = !reveal;
  els.jobFootbar.hidden = false;
  if (bad) els.jobCount.textContent = '';
}

els.jobReveal.addEventListener('click', () => {
  if (state.lastBackupFile) window.flat.revealFile(state.lastBackupFile);
});

els.jobDone.addEventListener('click', async () => {
  // Back to where the button was pressed from, with what has changed since
  // looked at again.
  showView(state.mode);
  await loadMine();
  await scanApps();
  const found = await window.flat.settingsBackupFind();
  if (found && found.ok) openBackup(found);
  if (state.restore) {
    const again = await window.flat.settingsBackupDescribe(state.restore.file);
    if (again && again.ok) openBackup(again);
  }
});


// ---------------------------------------------------------------------------
// My apps: the standing list, and installing it onto a bare machine
// ---------------------------------------------------------------------------

// Same shape the main process validates against. Checked here too so a typo
// shows itself in the field being typed into rather than as a failure three
// screens later.
const APP_ID = /^[A-Za-z][A-Za-z0-9-_]*(\.[A-Za-z0-9-_]+){2,}$/;

// The same app twice is a list that says one thing and installs another, so
// the second copy is marked rather than quietly ignored.
function duplicateIds() {
  const seen = new Set();
  const twice = new Set();
  for (const entry of state.mine) {
    const id = (entry.id || '').trim();
    if (!id) continue;
    if (seen.has(id)) twice.add(id);
    seen.add(id);
  }
  return twice;
}

function renderMine() {
  els.mineList.textContent = '';
  const dupes = duplicateIds();

  for (const entry of state.mine) {
    const li = document.createElement('li');
    li.className = 'editrow';
    li.dataset.id = entry.id;
    li.classList.toggle('is-ticked', state.mineTicked.has(entry));

    const tickWrap = document.createElement('label');
    tickWrap.className = 'tick';
    const tick = document.createElement('input');
    tick.type = 'checkbox';
    tick.checked = state.mineTicked.has(entry);
    tick.setAttribute('aria-label', `Tick ${entry.name || entry.id || 'this row'}`);
    tick.addEventListener('change', () => {
      if (tick.checked) state.mineTicked.add(entry);
      else state.mineTicked.delete(entry);
      li.classList.toggle('is-ticked', tick.checked);
      updateTicks();
    });
    tickWrap.appendChild(tick);

    const keepCell = document.createElement('div');
    keepCell.className = 'keepcell';
    // Nothing saved here means nothing to keep, so there is no switch to
    // flick on in the belief that it was forgotten — just the plain fact.
    const empty = noSettingsHere(entry.id);
    if (empty) {
      const none = document.createElement('span');
      none.className = 'no-settings';
      none.textContent = 'No settings';
      none.title = 'This app has saved nothing on this machine, so it installs fresh';
      keepCell.appendChild(none);
    }
    const keepLabel = document.createElement('label');
    keepLabel.className = 'switch';
    const keepBox = document.createElement('input');
    keepBox.type = 'checkbox';
    keepBox.setAttribute('role', 'switch');
    keepBox.checked = keeps(entry);
    keepBox.setAttribute('aria-label', `Keep the settings of ${entry.name || entry.id || 'this app'}`);
    const keepTrack = document.createElement('span');
    keepTrack.className = 'track';
    keepLabel.append(keepBox, keepTrack);
    if (!empty) keepCell.appendChild(keepLabel);
    // A switch applies immediately; nothing waits for a Save button.
    keepBox.addEventListener('change', () => {
      entry.keep = keepBox.checked;
      entry.keepChosen = true;
      renderMine();
      saveMineNow(true);
    });

    const name = document.createElement('input');
    name.className = 'cell cell--name';
    name.value = entry.name || '';
    name.placeholder = 'What you call it';
    name.setAttribute('aria-label', 'App name');

    // The ID and remote are shown, not edited. Every app on the list came
    // from a search that found it, from this machine, or from a saved list;
    // a box to type an ID into is only a way to mistype one.
    const id = document.createElement('span');
    id.className = 'cell cell--id cell--fixed';
    id.textContent = entry.id || '';
    id.title = entry.id || '';

    const remote = document.createElement('span');
    remote.className = 'cell cell--remote cell--fixed';
    remote.textContent = entry.remote || 'flathub';

    const tag = quietTick(entry.installed ? 'Installed on this machine' : null);

    const drop = document.createElement('button');
    drop.type = 'button';
    drop.className = 'drop';
    drop.textContent = '\u00d7';
    brief(drop, `Remove ${entry.name || entry.id}`);

    // A row carried over from an older list with a bad or repeated ID is
    // still flagged, so it can be seen and removed.
    const value = (entry.id || '').trim();
    if (!APP_ID.test(value) || dupes.has(value)) id.classList.add('is-bad');

    // The name is only a label, so it stays editable, and saves itself.
    name.addEventListener('input', () => {
      entry.name = name.value;
      saveMineSoon();
    });

    // Two-click removal, per the Morphic Button standard: the first click
    // shows a tick and asks, and stands back down on its own.
    let armed = false;
    let timer = null;
    drop.addEventListener('click', () => {
      if (!armed) {
        armed = true;
        drop.classList.add('is-armed');
        drop.textContent = '\u2713';
        timer = setTimeout(() => {
          armed = false;
          drop.classList.remove('is-armed');
          drop.textContent = '\u00d7';
        }, 3000);
        return;
      }
      clearTimeout(timer);
      const gone = (entry.id || '').trim();
      if (gone) state.mineNever.add(gone);
      state.mine = state.mine.filter((e) => e !== entry);
      state.mineTicked.delete(entry);
      renderMine();
      updateMineTally();
      saveMineNow();
    });

    const here = state.apps.find((a) => a.id === (entry.id || '').trim());
    const size = sizeCell(chosenBytes(entry, here), Boolean(here));
    if (here && here.trimmable) {
      size.title = `Settings only: ${formatBytes(here.dataBytes)} · Full: ${formatBytes(here.fullBytes)}`;
    }

    // Full: only where it changes something — an app with settings here,
    // being kept, that has things a trimmed backup would leave out.
    const fullCell = document.createElement('div');
    fullCell.className = 'fullcell';
    if (here && here.trimmable && keeps(entry)) {
      const box = document.createElement('input');
      box.type = 'checkbox';
      box.checked = Boolean(entry.full);
      box.title = 'Back up the whole folder, cache and all';
      box.setAttribute('aria-label', `Back up all of ${entry.name || entry.id}, cache and all`);
      box.addEventListener('change', () => {
        entry.full = box.checked;
        size.textContent = formatBytes(chosenBytes(entry, here)) || '—';
        size.classList.toggle('is-heavy', chosenBytes(entry, here) >= HEAVY_BYTES);
        updateMineTally();
        saveMineNow(true);
      });
      fullCell.appendChild(box);
    }

    li.append(tickWrap, tag, name, id, remote, size, keepCell, fullCell, drop);
    els.mineList.appendChild(li);
  }

  els.mineEmpty.hidden = state.mine.length > 0;
  els.mineAll.closest('.colhead').hidden = state.mine.length === 0;
  updateTicks();
  // All apps marks which apps are on this list, so it follows every change
  // here at once, rather than showing yesterday's list until Flat restarts.
  if (state.apps.length) {
    renderAllList();
    updateAllTally();
  }
}

// ---- ticking: what goes into the backup ----------------------------------------

// Ticks choose what the backup carries. Everything starts ticked, so pressing
// Back up takes the whole list unless something is deliberately left out.
function updateTicks() {
  for (const entry of [...state.mineTicked]) {
    if (!state.mine.includes(entry)) state.mineTicked.delete(entry);
  }
  const ticked = state.mineTicked.size;
  const total = state.mine.length;
  els.mineAll.checked = total > 0 && ticked === total;
  els.mineAll.indeterminate = ticked > 0 && ticked < total;
  els.mineAllLabel.textContent = ticked ? `${ticked}` : 'All';
  updateMineTally();
}

els.mineAll.addEventListener('change', () => {
  state.mineTicked = els.mineAll.checked ? new Set(state.mine) : new Set();
  renderMine();
});

function updateMineTally() {
  const valid = uniqueWanted();
  const broken = state.mine.length - valid.length;
  const ticked = valid.filter((e) => state.mineTicked.has(e));
  const keeping = ticked.filter(keeps).length;

  const bytes = ticked.filter(keeps).reduce((sum, e) => {
    const app = state.apps.find((a) => a.id === e.id);
    return sum + chosenBytes(e, app);
  }, 0);
  els.mineTally.textContent = state.mine.length
    ? `${plural(state.mine.length, 'app', 'apps')} on the list · ${keeping} keep settings${bytes ? ` · about ${formatBytes(bytes)} of settings` : ''}`
    : 'Nothing on the list';

  // What the button is about to do, on the page rather than behind the i.
  if (broken) {
    setHint(els.mineHint, `${plural(broken, 'row is', 'rows are')} a repeat or not a valid app ID, and will be left out.`);
  } else if (!state.mine.length) {
    setHint(els.mineHint, 'Add apps from All apps, or search for them above.');
  } else if (!ticked.length) {
    setHint(els.mineHint, 'Tick the apps you want to take with you.');
  } else {
    setHint(els.mineHint, `Back up saves ${plural(ticked.length, 'ticked app', 'ticked apps')}${keeping ? `, and the settings of ${keeping}` : ''}.`);
  }
  els.mineBackup.disabled = ticked.length === 0;
}

// Saving is debounced because these are auto-save fields and every keystroke
// would otherwise be a write and a toast.
let saveTimer = null;
function saveMineSoon() {
  clearTimeout(saveTimer);
  saveTimer = setTimeout(saveMineNow, 800);
}

async function saveMineNow(quiet) {
  clearTimeout(saveTimer);
  const result = await window.flat.listWrite({
    apps: state.mine.map(({ id, name, remote, keep, keepChosen, full }) => ({ id, name, remote, keep: Boolean(keep), keepChosen: Boolean(keepChosen), full: Boolean(full) })),
    never: [...state.mineNever],
  });
  if (result && result.ok) {
    state.mineNever = new Set(result.never || []);
    els.mineForget.hidden = state.mineNever.size === 0;
    if (!quiet) say(els.mineHint, 'Saved');
  }
}

// One entry per id, valid ids only — the same set the install uses, so the
// count on the button is the count that happens.
function uniqueWanted() {
  const seen = new Set();
  const out = [];
  for (const entry of state.mine) {
    const id = (entry.id || '').trim();
    if (!APP_ID.test(id) || seen.has(id)) continue;
    seen.add(id);
    out.push(entry);
  }
  return out;
}

// `explicit` is a person naming this one app. That always wins, and it
// cancels an earlier removal. A bulk add is not explicit, so it respects
// what has been taken off before.
function addToMine(entry, { explicit = false } = {}) {
  const id = (entry.id || '').trim();
  if (!id || state.mine.some((e) => e.id === id)) return false;
  if (!explicit && state.mineNever.has(id)) return false;
  state.mineNever.delete(id);
  const row = {
    id,
    name: entry.name || id,
    remote: entry.remote || 'flathub',
    installed: Boolean(entry.installed),
    keep: Boolean(entry.keep),
  };
  state.mine.push(row);
  state.mineTicked.add(row);
  return true;
}

// Adds a batch from somewhere else in the app and says what happened, in
// words rather than a silent count that does not add up.
// `keep`: the batch comes from somewhere about settings — the Back up or
// Restore tab — so every app in it is marked Keep settings, including ones
// that were already on the list as Fresh. Ticking an app on those tabs and
// sending it here is saying "this one's settings matter".
async function addBatchToMine(entries, where, { explicit = false } = {}) {
  let added = 0;
  let held = 0;
  const marked = 0;
  for (const entry of entries) {
    const id = (entry.id || '').trim();
    if (state.mine.some((e) => e.id === id)) continue;
    if (addToMine({ ...entry, keep: false }, { explicit })) added += 1;
    else if (state.mineNever.has(id)) held += 1;
  }
  renderMine();
  updateMineTally();
  // `quiet`: the sentence below is the notification, so the save does not
  // need one of its own on top of it.
  if (added || marked) await saveMineNow(true);

  let done = added
    ? `${plural(added, 'app', 'apps')} added to My apps`
    : 'Nothing new to add';
  if (marked) done += `, ${marked} more marked Keep settings`;
  const heldNote = held
    ? ` ${plural(held, 'app you had removed was', 'apps you had removed were')} left out.`
    : '';
  say(els.mineHint, `${done} from ${where}.${heldNote}`);
  return { added, held, marked, done, heldNote };
}

async function loadMine() {
  const loaded = await window.flat.listRead();
  state.mine = loaded.apps;
  state.mineNever = new Set(loaded.never || []);
  els.mineForget.hidden = state.mineNever.size === 0;
  els.flathubWarning.hidden = loaded.hasFlathub;
  state.mineTicked = new Set(state.mine);
  renderMine();
  updateMineTally();
}

// --- searching for something to add -----------------------------------------

let searchTimer = null;
els.mineSearch.addEventListener('input', () => {
  clearTimeout(searchTimer);
  const term = els.mineSearch.value.trim();
  if (term.length < 2) {
    els.mineResults.hidden = true;
    return;
  }
  searchTimer = setTimeout(async () => {
    const found = await window.flat.listSearch(term);
    renderResults(found);
  }, 350);
});

function renderResults(found) {
  els.mineResults.textContent = '';
  if (!found.length) {
    els.mineResults.hidden = true;
    return;
  }
  for (const hit of found) {
    const li = document.createElement('li');
    li.className = 'result';
    const already = state.mine.some((e) => e.id === hit.id);
    li.dataset.on = String(already);

    const text = document.createElement('div');
    text.className = 'result-text';
    const name = document.createElement('div');
    name.className = 'result-name';
    name.textContent = hit.name;
    const sub = document.createElement('div');
    sub.className = 'result-sub';
    sub.textContent = hit.description ? `${hit.id} — ${hit.description}` : hit.id;
    text.append(name, sub);

    const add = document.createElement('span');
    add.className = 'result-add';
    add.textContent = already ? 'on the list' : 'Add';

    li.append(text, add);
    li.addEventListener('click', () => {
      if (li.dataset.on === 'true') return;
      addToMine(hit, { explicit: true });
      li.dataset.on = 'true';
      add.textContent = 'on the list';
      renderMine();
      updateMineTally();
      saveMineNow();
    });
    els.mineResults.appendChild(li);
  }
  els.mineResults.hidden = false;
}

// --- filling and moving the list --------------------------------------------

els.mineFromInstalled.addEventListener('click', async () => {
  const installed = await window.flat.listFromInstalled();
  await addBatchToMine(installed.map((e) => ({ ...e, installed: true })), 'this machine');
});

// A Reset, and it hides itself when there is nothing to reset: a button that
// does nothing when pressed is one you stop trusting.
arming(els.mineForget, 'Forget removals', async () => {
  state.mineNever = new Set();
  await saveMineNow();
  say(els.mineHint, 'Removals forgotten. A batch add will bring those apps back.');
  return true;
});

els.mineExport.addEventListener('click', async () => {
  const result = await window.flat.listExport({
    apps: state.mine.map(({ id, name, remote, keep, keepChosen, full }) => ({ id, name, remote, keep: Boolean(keep), keepChosen: Boolean(keepChosen), full: Boolean(full) })),
    never: [...state.mineNever],
  });
  if (result.canceled) return;
  if (result.error) {
    setHint(els.mineHint, result.error);
    return;
  }
  say(els.mineHint, `List saved to ${result.file}`);
});

els.mineImport.addEventListener('click', async () => {
  const result = await window.flat.listImport();
  if (result.canceled) return;
  if (!result.ok) {
    setHint(els.mineHint, result.error);
    return;
  }
  for (const id of result.never || []) state.mineNever.add(id);
  for (const entry of result.apps) addToMine(entry, { explicit: true });
  await saveMineNow();
  await loadMine();
});

// --- installing --------------------------------------------------------------

// ---------------------------------------------------------------------------
// Restore: open a backup, choose, press Restore
// ---------------------------------------------------------------------------

function restoreEntries() {
  return state.restore ? state.restore.entries : [];
}

function renderRestore() {
  els.restoreList.textContent = '';
  const entries = restoreEntries();
  els.restoreColhead.hidden = entries.length === 0;

  for (const entry of entries) {
    const li = document.createElement('li');
    li.className = 'editrow';
    const ticked = state.restoreTicked.has(entry.id);
    li.classList.toggle('is-ticked', ticked);

    const tickWrap = document.createElement('label');
    tickWrap.className = 'tick';
    const tick = document.createElement('input');
    tick.type = 'checkbox';
    tick.checked = ticked;
    tick.setAttribute('aria-label', `Restore ${entry.name}`);
    tick.addEventListener('change', () => {
      if (tick.checked) state.restoreTicked.add(entry.id);
      else state.restoreTicked.delete(entry.id);
      li.classList.toggle('is-ticked', tick.checked);
      updateRestoreTally();
    });
    tickWrap.appendChild(tick);

    const here = quietTick(entry.installed ? 'Already on this machine' : null);

    const name = document.createElement('span');
    name.className = 'cell cell--name cell--fixed';
    name.textContent = entry.name;

    const id = document.createElement('span');
    id.className = 'cell cell--id cell--fixed';
    id.textContent = entry.id;
    id.title = entry.id;

    // On for every app whose settings are in the backup; the plain words
    // where there are none, so there is nothing to switch on in vain.
    const keepCell = document.createElement('div');
    keepCell.className = 'keepcell';
    if (entry.keep) {
      const label = document.createElement('label');
      label.className = 'switch';
      const box = document.createElement('input');
      box.type = 'checkbox';
      box.setAttribute('role', 'switch');
      box.checked = state.restoreKeep.get(entry.id) !== false;
      box.setAttribute('aria-label', `Bring back the settings of ${entry.name}`);
      box.addEventListener('change', () => {
        state.restoreKeep.set(entry.id, box.checked);
        updateRestoreTally();
      });
      const track = document.createElement('span');
      track.className = 'track';
      label.append(box, track);
      keepCell.appendChild(label);
    } else {
      const none = document.createElement('span');
      none.className = 'no-settings';
      none.textContent = 'No settings';
      none.title = 'The backup holds no settings for this app, so it installs fresh';
      keepCell.appendChild(none);
    }

    const size = sizeCell(entry.keep ? entry.bytes : 0, true);

    li.append(tickWrap, here, name, id, size, keepCell);
    els.restoreList.appendChild(li);
  }
  updateRestoreTally();
}

function updateRestoreTally() {
  const entries = restoreEntries();
  const ticked = entries.filter((e) => state.restoreTicked.has(e.id));
  const withSettings = ticked.filter((e) => e.keep && state.restoreKeep.get(e.id) !== false).length;
  const already = ticked.filter((e) => e.installed).length;

  els.restoreAll.checked = entries.length > 0 && ticked.length === entries.length;
  els.restoreAll.indeterminate = ticked.length > 0 && ticked.length < entries.length;
  els.restoreAllLabel.textContent = ticked.length ? `${ticked.length}` : 'All';

  if (!state.restore) {
    els.restoreTally.textContent = 'No backup open';
    setHint(els.restoreHint, '');
  } else {
    const bytes = ticked.filter((e) => e.keep && state.restoreKeep.get(e.id) !== false)
      .reduce((sum, e) => sum + (e.bytes || 0), 0);
    els.restoreTally.textContent = `${plural(ticked.length, 'app', 'apps')} ticked · ${withSettings} with settings${bytes ? ` · about ${formatBytes(bytes)}` : ''}`;
    setHint(els.restoreHint, already
      ? `${already} ${already === 1 ? 'is' : 'are'} already on this machine and will be left alone, settings and all.`
      : 'Untick anything you do not want here.');
  }
  els.restoreGo.disabled = ticked.filter((e) => !e.installed).length === 0;
}

function showBackupSource() {
  const b = state.restore;
  els.restoreNote.hidden = !b;
  els.restoreSourceText.textContent = '';
  if (!b) {
    els.restoreSourceText.textContent = 'Open the backup you made on your old machine.';
    return;
  }
  const strong = document.createElement('strong');
  strong.textContent = b.name;
  const when = b.created ? new Date(b.created).toLocaleDateString() : '';
  els.restoreSourceText.append(strong, `${b.host ? `, made on ${b.host}` : ''}${when ? ` on ${when}` : ''}.`);
}

function openBackup(described) {
  state.restore = described;
  state.restoreTicked = new Set(described.entries.map((e) => e.id));
  state.restoreKeep = new Map();
  showBackupSource();
  renderRestore();
}

els.restoreAll.addEventListener('change', () => {
  state.restoreTicked = els.restoreAll.checked ? new Set(restoreEntries().map((e) => e.id)) : new Set();
  renderRestore();
});

els.restoreOpen.addEventListener('click', async () => {
  const chosen = await window.flat.settingsBackupChoose();
  if (chosen.canceled) return;
  if (!chosen.ok) {
    say(els.restoreHint, chosen.error);
    return;
  }
  openBackup(chosen);
});

els.restoreGo.addEventListener('click', async () => {
  if (!state.restore) return;
  const wanted = restoreEntries().filter((e) => state.restoreTicked.has(e.id));
  if (!wanted.length) return;

  startJob('Restoring', wanted.map((e) => ({ id: e.id, name: e.name })));
  const result = await window.flat.installApps({
    apps: wanted.map((e) => ({
      id: e.id, name: e.name, remote: e.remote,
      keep: Boolean(e.keep) && state.restoreKeep.get(e.id) !== false,
    })),
    packFile: state.restore.file,
  });

  if (!result.ok) {
    finishJob({ head: 'Restore failed', summary: result.error, bad: true });
    return;
  }

  for (const entry of result.results) {
    if (entry.skipped) noteOnce(entry.id, 'skipped', 'Already here, so it was left alone');
    else if (!entry.ok) noteOnce(entry.id, 'failed', entry.error);
  }
  for (const [id, note] of Object.entries(result.settingsNotes || {})) addJobNote(id, note.text, note.bad);

  const parts = [`${plural(result.succeeded, 'app', 'apps')} installed`];
  if (result.settingsRestored) parts.push(`${result.settingsRestored} with settings back`);
  if (result.skipped) parts.push(`${result.skipped} already here`);
  if (result.failed) parts.push(`${result.failed} failed`);
  const problems = result.failed || result.settingsMissed;
  finishJob({
    head: problems ? 'Finished, with problems' : 'Finished',
    summary: parts.join(' \u00b7 '),
    hint: result.failed
      ? 'A failure is usually an app the remote no longer carries.'
      : 'Sign in again anywhere an app kept its login in the system keyring.',
    bad: Boolean(problems),
  });
});

arming(els.addFlathub, 'Add Flathub', async () => {
  const result = await window.flat.addFlathub();
  if (!result.ok) return false;
  els.flathubWarning.hidden = true;
  return true;
});

// ---------------------------------------------------------------------------
// Update widget, to the update-widget spec: one 16px dot, five colours, and
// a one-per-second pulse whenever it is working.
// ---------------------------------------------------------------------------

const RING_RADIUS = 7;
const RING_CIRCUMFERENCE = 2 * Math.PI * RING_RADIUS;
els.updateDotRingFill.style.strokeDasharray = String(RING_CIRCUMFERENCE);

// The spec's own words, where it gives them.
const UPDATE_DOT_LABELS = {
  current: 'up to date',
  checking: 'checking for an update',
  available: 'update available — click to download',
  downloading: 'downloading',
  downloaded: 'click to restart',
  installing: 'restarting',
  error: "can't reach the update server — click to try again",
};

// The dot is working, not waiting for you, in these.
const INERT_STATES = ['checking', 'downloading', 'installing'];
const PULSING_STATES = ['checking', 'installing'];

let updateState = null;
let updateLabel = '';

function setUpdateDot(nextState, overrideLabel) {
  updateState = nextState;
  els.updateDot.dataset.state = nextState;
  els.updateDot.classList.toggle('is-pulsing', PULSING_STATES.includes(nextState));
  els.updateDot.setAttribute('aria-disabled', String(INERT_STATES.includes(nextState)));
  updateLabel = overrideLabel || UPDATE_DOT_LABELS[nextState] || '';
  els.updateDot.setAttribute('aria-label', updateLabel);
}

function setRingProgress(fraction) {
  const offset = RING_CIRCUMFERENCE * (1 - Math.max(0, Math.min(1, fraction)));
  els.updateDotRingFill.style.strokeDashoffset = String(offset);
}

// Every state has a hover tooltip naming it. It reads the label at the
// moment of hovering, so it is never the state from a minute ago, and it
// clears itself inside two seconds like every other tooltip in the app.
brief(els.updateDot, () => updateLabel);

function applyUpdateState(next) {
  if (next.status === 'none') setUpdateDot('current');
  else if (next.status === 'available') setUpdateDot('available');
  else if (next.status === 'downloading') {
    setUpdateDot('downloading');
    setRingProgress(next.percent / 100);
  } else if (next.status === 'downloaded') {
    setRingProgress(1);
    setUpdateDot('downloaded');
  } else if (next.status === 'error') setUpdateDot('error');
}

// A manual check pulses at least three times — three seconds at one a
// second — and keeps pulsing if the check takes longer. The minimum is there
// so a fast answer still reads as "it looked", not as a flicker.
const MIN_CHECK_MS = 3000;
const NO_UPDATE_NOTE_MS = 3000;
let checking = false;
let queuedState = null;

async function runManualCheck() {
  checking = true;
  queuedState = null;
  setUpdateDot('checking');

  const minimum = new Promise((resolve) => setTimeout(resolve, MIN_CHECK_MS));
  const result = await window.flat.updateCheck();
  await minimum;

  checking = false;
  if (queuedState) {
    const answer = queuedState;
    queuedState = null;
    if (answer.status === 'none') {
      noUpdateFound();
    } else {
      applyUpdateState(answer);
    }
  } else if (result && result.error) {
    setUpdateDot('error');
  } else {
    noUpdateFound();
  }
}

// "no update available", briefly, then back to plain "up to date".
function noUpdateFound() {
  setUpdateDot('current', 'no update available');
  setTimeout(() => {
    if (updateState === 'current') setUpdateDot('current');
  }, NO_UPDATE_NOTE_MS);
}

window.flat.onUpdateState((next) => {
  if (checking) queuedState = next;
  else if (updateState !== 'installing') applyUpdateState(next);
});

// The dot is on screen from the first moment, never popping in later. Until
// the startup check answers it is checking, so it pulses — a still dot while
// it looks would say nothing is happening. If the answer came in before the
// page was listening, it is picked up here rather than lost.
async function startUpdateDot() {
  setUpdateDot('checking');
  const known = await window.flat.updateStateGet();
  if (known && updateState === 'checking') applyUpdateState(known);
}

els.updateDot.addEventListener('click', async () => {
  if (checking || INERT_STATES.includes(updateState)) return;
  if (updateState === 'current' || updateState === 'error') {
    await runManualCheck();
  } else if (updateState === 'available') {
    setRingProgress(0);
    setUpdateDot('downloading');
    await window.flat.updateDownload();
  } else if (updateState === 'downloaded') {
    // Pulses from here until the app goes down to restart. No fixed count.
    setUpdateDot('installing');
    const result = await window.flat.updateInstall();
    if (result && result.error) {
      // Could not restart right now (a job is running). Say why in the
      // dot's own label, then drop back to the plain "ready" wording.
      setUpdateDot('downloaded', result.error);
      setTimeout(() => {
        if (updateState === 'downloaded') setUpdateDot('downloaded');
      }, 6000);
    }
  }
});

// ---------------------------------------------------------------------------
// Start
// ---------------------------------------------------------------------------

(async function start() {
  const info = await window.flat.appInfo();
  els.updateWidgetVersion.textContent = `v${info.version}`;
  startUpdateDot();

  const probe = await window.flat.probe();
  if (!probe.present) {
    els.viewAll.hidden = true;
    els.viewMine.hidden = true;
    els.blocker.hidden = false;
    els.blockerBody.textContent =
      'Flat works by driving the flatpak command, and it is not on this machine. '
      + 'Nothing can be listed, backed up or installed until it is there.';
    els.tabAll.disabled = true;
    els.tabMine.disabled = true;
    return;
  }

  await loadMine();
  await scanApps();
}());