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
|
// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package timeline
import (
"container/list"
"context"
"errors"
"codeberg.org/gruf/go-kv"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/log"
)
func (t *timeline) prepareXBetweenIDs(ctx context.Context, amount int, behindID string, beforeID string, frontToBack bool) error {
l := log.
WithContext(ctx).
WithFields(kv.Fields{
{"amount", amount},
{"behindID", behindID},
{"beforeID", beforeID},
{"frontToBack", frontToBack},
}...)
l.Trace("entering prepareXBetweenIDs")
if beforeID >= behindID {
// This is an impossible situation, we
// can't prepare anything between these.
return nil
}
if err := t.indexXBetweenIDs(ctx, amount, behindID, beforeID, frontToBack); err != nil {
// An error here doesn't necessarily mean we
// can't prepare anything, so log + keep going.
l.Debugf("error calling prepareXBetweenIDs: %s", err)
}
t.Lock()
defer t.Unlock()
// Try to prepare everything between (and including) the two points.
var (
toPrepare = make(map[*list.Element]*indexedItemsEntry)
foundToPrepare int
)
if frontToBack {
// Paging forwards / down.
for e := t.items.data.Front(); e != nil; e = e.Next() {
entry := e.Value.(*indexedItemsEntry) //nolint:forcetypeassert
if entry.itemID > behindID {
l.Trace("item is too new, continuing")
continue
}
if entry.itemID < beforeID {
// We've gone beyond the bounds of
// items we're interested in; stop.
l.Trace("reached older items, breaking")
break
}
// Only prepare entry if it's not
// already prepared, save db calls.
if entry.prepared == nil {
toPrepare[e] = entry
}
foundToPrepare++
if foundToPrepare >= amount {
break
}
}
} else {
// Paging backwards / up.
for e := t.items.data.Back(); e != nil; e = e.Prev() {
entry := e.Value.(*indexedItemsEntry) //nolint:forcetypeassert
if entry.itemID < beforeID {
l.Trace("item is too old, continuing")
continue
}
if entry.itemID > behindID {
// We've gone beyond the bounds of
// items we're interested in; stop.
l.Trace("reached newer items, breaking")
break
}
if entry.prepared == nil {
toPrepare[e] = entry
}
// Only prepare entry if it's not
// already prepared, save db calls.
foundToPrepare++
if foundToPrepare >= amount {
break
}
}
}
for e, entry := range toPrepare {
prepared, err := t.prepareFunction(ctx, t.timelineID, entry.itemID)
if err != nil {
if errors.Is(err, db.ErrNoEntries) {
// ErrNoEntries means something has been deleted,
// so we'll likely not be able to ever prepare this.
// This means we can remove it and skip past it.
l.Debugf("db.ErrNoEntries while trying to prepare %s; will remove from timeline", entry.itemID)
t.items.data.Remove(e)
continue
}
// We've got a proper db error.
return gtserror.Newf("db error while trying to prepare %s: %w", entry.itemID, err)
}
entry.prepared = prepared
}
return nil
}
|
