KIMAP

fetchjob.cpp
1/*
2 SPDX-FileCopyrightText: 2009 Kevin Ottens <ervin@kde.org>
3
4 SPDX-License-Identifier: LGPL-2.0-or-later
5*/
6
7#include "fetchjob.h"
8
9#include "kimap_debug.h"
10#include <KLocalizedString>
11#include <QTimer>
12
13#include "job_p.h"
14#include "response_p.h"
15#include "session_p.h"
16
17namespace KIMAP
18{
19class FetchJobPrivate : public JobPrivate
20{
21public:
22 FetchJobPrivate(FetchJob *job, Session *session, const QString &name)
23 : JobPrivate(session, name)
24 , q(job)
25 {
26 }
27
28 ~FetchJobPrivate()
29 {
30 }
31
32 void parseBodyStructure(const QByteArray &structure, int &pos, KMime::Content *content);
33 void parsePart(const QByteArray &structure, int &pos, KMime::Content *content);
34 QByteArray parseString(const QByteArray &structure, int &pos);
35 QByteArray parseSentence(const QByteArray &structure, int &pos);
36 void skipLeadingSpaces(const QByteArray &structure, int &pos);
37
38 void emitPendings()
39 {
40 if (pendingMsgs.isEmpty()) {
41 return;
42 }
43
44 Q_EMIT q->messagesAvailable(pendingMsgs);
45
46 if (!pendingParts.isEmpty()) {
47 Q_EMIT q->partsReceived(selectedMailBox, pendingUids, pendingParts);
48 Q_EMIT q->partsReceived(selectedMailBox, pendingUids, pendingAttributes, pendingParts);
49 }
50 if (!pendingSizes.isEmpty() || !pendingFlags.isEmpty() || !pendingMessages.isEmpty()) {
51 Q_EMIT q->headersReceived(selectedMailBox, pendingUids, pendingSizes, pendingFlags, pendingMessages);
52 Q_EMIT q->headersReceived(selectedMailBox, pendingUids, pendingSizes, pendingAttributes, pendingFlags, pendingMessages);
53 }
54 if (!pendingMessages.isEmpty()) {
55 Q_EMIT q->messagesReceived(selectedMailBox, pendingUids, pendingMessages);
56 Q_EMIT q->messagesReceived(selectedMailBox, pendingUids, pendingAttributes, pendingMessages);
57 }
58
59 pendingUids.clear();
60 pendingMessages.clear();
61 pendingParts.clear();
62 pendingSizes.clear();
63 pendingFlags.clear();
64 pendingAttributes.clear();
65 pendingMsgs.clear();
66 }
67
68 FetchJob *const q;
69
70 ImapSet set;
71 bool uidBased = false;
72 FetchJob::FetchScope scope;
73 QString selectedMailBox;
74 bool gmailEnabled = false;
75
76 QTimer emitPendingsTimer;
77 QMap<qint64, MessagePtr> pendingMessages;
78 QMap<qint64, MessageParts> pendingParts;
79 QMap<qint64, MessageFlags> pendingFlags;
80 QMap<qint64, MessageAttribute> pendingAttributes;
81 QMap<qint64, qint64> pendingSizes;
82 QMap<qint64, qint64> pendingUids;
83 QMap<qint64, Message> pendingMsgs;
84};
85}
86
87using namespace KIMAP;
88
89FetchJob::FetchScope::FetchScope()
90 : mode(FetchScope::Content)
91 , changedSince(0)
92 , qresync(false)
93{
94}
95
96FetchJob::FetchJob(Session *session)
97 : Job(*new FetchJobPrivate(this, session, i18n("Fetch")))
98{
99 Q_D(FetchJob);
100 connect(&d->emitPendingsTimer, &QTimer::timeout, this, [d]() {
101 d->emitPendings();
102 });
103}
104
105void FetchJob::setSequenceSet(const ImapSet &set)
106{
107 Q_D(FetchJob);
108 Q_ASSERT(!set.isEmpty());
109 d->set = set;
110}
111
112ImapSet FetchJob::sequenceSet() const
113{
114 Q_D(const FetchJob);
115 return d->set;
116}
117
118void FetchJob::setUidBased(bool uidBased)
119{
120 Q_D(FetchJob);
121 d->uidBased = uidBased;
122}
123
124bool FetchJob::isUidBased() const
125{
126 Q_D(const FetchJob);
127 return d->uidBased;
128}
129
130void FetchJob::setScope(const FetchScope &scope)
131{
132 Q_D(FetchJob);
133 d->scope = scope;
134}
135
136FetchJob::FetchScope FetchJob::scope() const
137{
138 Q_D(const FetchJob);
139 return d->scope;
140}
141
142bool FetchJob::setGmailExtensionsEnabled() const
143{
144 Q_D(const FetchJob);
145 return d->gmailEnabled;
146}
147
148void FetchJob::setGmailExtensionsEnabled(bool enabled)
149{
150 Q_D(FetchJob);
151 d->gmailEnabled = enabled;
152}
153
154QString FetchJob::mailBox() const
155{
156 Q_D(const FetchJob);
157 return d->selectedMailBox;
158}
159
160void FetchJob::doStart()
161{
162 Q_D(FetchJob);
163
164 d->set.optimize();
165 QByteArray parameters = d->set.toImapSequenceSet() + ' ';
166 Q_ASSERT(!parameters.trimmed().isEmpty());
167
168 switch (d->scope.mode) {
169 case FetchScope::Headers:
170 if (d->scope.parts.isEmpty()) {
171 parameters += "(RFC822.SIZE INTERNALDATE BODY.PEEK[HEADER.FIELDS (TO FROM MESSAGE-ID REFERENCES IN-REPLY-TO SUBJECT DATE)] FLAGS UID";
172 } else {
173 parameters += '(';
174 for (const QByteArray &part : std::as_const(d->scope.parts)) {
175 parameters += "BODY.PEEK[" + part + ".MIME] ";
176 }
177 parameters += "UID";
178 }
179 break;
180 case FetchScope::Flags:
181 parameters += "(FLAGS UID";
182 break;
183 case FetchScope::Structure:
184 parameters += "(BODYSTRUCTURE UID";
185 break;
186 case FetchScope::Content:
187 if (d->scope.parts.isEmpty()) {
188 parameters += "(BODY.PEEK[] UID";
189 } else {
190 parameters += '(';
191 for (const QByteArray &part : std::as_const(d->scope.parts)) {
192 parameters += "BODY.PEEK[" + part + "] ";
193 }
194 parameters += "UID";
195 }
196 break;
197 case FetchScope::Full:
198 parameters += "(RFC822.SIZE INTERNALDATE BODY.PEEK[] FLAGS UID";
199 break;
200 case FetchScope::HeaderAndContent:
201 if (d->scope.parts.isEmpty()) {
202 parameters += "(BODY.PEEK[] FLAGS UID";
203 } else {
204 parameters += "(BODY.PEEK[HEADER.FIELDS (TO FROM MESSAGE-ID REFERENCES IN-REPLY-TO SUBJECT DATE)]";
205 for (const QByteArray &part : std::as_const(d->scope.parts)) {
206 parameters += " BODY.PEEK[" + part + ".MIME] BODY.PEEK[" + part + "]"; // krazy:exclude=doublequote_chars
207 }
208 parameters += " FLAGS UID";
209 }
210 break;
211 case FetchScope::FullHeaders:
212 parameters += "(RFC822.SIZE INTERNALDATE BODY.PEEK[HEADER] FLAGS UID";
213 break;
214 }
215
216 if (d->gmailEnabled) {
217 parameters += " X-GM-LABELS X-GM-MSGID X-GM-THRID";
218 }
219 parameters += ")";
220
221 if (d->scope.changedSince > 0) {
222 parameters += " (CHANGEDSINCE " + QByteArray::number(d->scope.changedSince);
223 if (d->scope.qresync) {
224 parameters += " VANISHED";
225 }
226 parameters += ")";
227 }
228
229 QByteArray command = "FETCH";
230 if (d->uidBased) {
231 command = "UID " + command;
232 }
233
234 d->emitPendingsTimer.start(100);
235 d->selectedMailBox = d->m_session->selectedMailBox();
236 d->tags << d->sessionInternal()->sendCommand(command, parameters);
237}
238
239void FetchJob::handleResponse(const Response &response)
240{
241 Q_D(FetchJob);
242
243 // We can predict it'll be handled by handleErrorReplies() so stop
244 // the timer now so that result() will really be the last emitted signal.
245 if (!response.content.isEmpty() && d->tags.size() == 1 && d->tags.contains(response.content.first().toString())) {
246 d->emitPendingsTimer.stop();
247 d->emitPendings();
248 }
249
250 if (handleErrorReplies(response) == NotHandled) {
251 if (response.content.size() == 4 && response.content[1].toString() == "VANISHED") {
252 const auto vanishedSet = ImapSet::fromImapSequenceSet(response.content[3].toString());
253 Q_EMIT messagesVanished(vanishedSet);
254 } else if (response.content.size() == 4 && response.content[2].toString() == "FETCH" && response.content[3].type() == Response::Part::List) {
255 const qint64 id = response.content[1].toString().toLongLong();
256 const QList<QByteArray> content = response.content[3].toList();
257
258 Message msg;
259 MessagePtr message(new KMime::Message);
260 bool shouldParseMessage = false;
261 MessageParts parts;
262
263 for (QList<QByteArray>::ConstIterator it = content.constBegin(); it != content.constEnd(); ++it) {
264 QByteArray str = *it;
265 ++it;
266
267 if (it == content.constEnd()) { // Uh oh, message was truncated?
268 qCWarning(KIMAP_LOG) << "FETCH reply got truncated, skipping.";
269 break;
270 }
271
272 if (str == "UID") {
273 d->pendingUids[id] = msg.uid = it->toLongLong();
274 } else if (str == "RFC822.SIZE") {
275 d->pendingSizes[id] = msg.size = it->toLongLong();
276 } else if (str == "INTERNALDATE") {
277 message->date()->setDateTime(QDateTime::fromString(QLatin1StringView(*it), Qt::RFC2822Date));
278 } else if (str == "FLAGS") {
279 if ((*it).startsWith('(') && (*it).endsWith(')')) {
280 QByteArray str = *it;
281 str.chop(1);
282 str.remove(0, 1);
283 const auto flags = str.split(' ');
284 d->pendingFlags[id] = flags;
285 msg.flags = flags;
286 } else {
287 d->pendingFlags[id] << *it;
288 msg.flags << *it;
289 }
290 } else if (str == "X-GM-LABELS") {
291 d->pendingAttributes.insert(id, {"X-GM-LABELS", *it});
292 msg.attributes.insert("X-GM-LABELS", *it);
293 } else if (str == "X-GM-THRID") {
294 d->pendingAttributes.insert(id, {"X-GM-THRID", *it});
295 msg.attributes.insert("X-GM-THRID", *it);
296 } else if (str == "X-GM-MSGID") {
297 d->pendingAttributes.insert(id, {"X-GM-MSGID", *it});
298 msg.attributes.insert("X-GM-MSGID", *it);
299 } else if (str == "BODYSTRUCTURE") {
300 int pos = 0;
301 d->parseBodyStructure(*it, pos, message.data());
302 message->assemble();
303 d->pendingMessages[id] = message;
304 msg.message = message;
305 } else if (str.startsWith("BODY[")) { // krazy:exclude=strings
306 if (!str.endsWith(']')) { // BODY[ ... ] might have been split, skip until we find the ]
307 while (!(*it).endsWith(']')) {
308 ++it;
309 }
310 ++it;
311 }
312
313 int index;
314 if ((index = str.indexOf("HEADER")) > 0 || (index = str.indexOf("MIME")) > 0) { // headers
315 if (str[index - 1] == '.') {
316 QByteArray partId = str.mid(5, index - 6);
317 if (!parts.contains(partId)) {
318 parts[partId] = ContentPtr(new KMime::Content);
319 }
320 parts[partId]->setHead(*it);
321 parts[partId]->parse();
322 d->pendingParts[id] = parts;
323 msg.parts = parts;
324 } else {
325 message->setHead(*it);
326 shouldParseMessage = true;
327 }
328 } else { // full payload
329 if (str == "BODY[]") {
330 message->setContent(KMime::CRLFtoLF(*it));
331 shouldParseMessage = true;
332
333 d->pendingMessages[id] = message;
334 msg.message = message;
335 } else {
336 QByteArray partId = str.mid(5, str.size() - 6);
337 if (!parts.contains(partId)) {
338 parts[partId] = ContentPtr(new KMime::Content);
339 }
340 parts[partId]->setBody(*it);
341 parts[partId]->parse();
342
343 d->pendingParts[id] = parts;
344 msg.parts = parts;
345 }
346 }
347 }
348 }
349
350 if (shouldParseMessage) {
351 message->parse();
352 }
353
354 // For the headers mode the message is built in several
355 // steps, hence why we wait it to be done until putting it
356 // in the pending queue.
357 if (d->scope.mode == FetchScope::Headers || d->scope.mode == FetchScope::HeaderAndContent || d->scope.mode == FetchScope::FullHeaders) {
358 d->pendingMessages[id] = message;
359 msg.message = message;
360 }
361
362 d->pendingMsgs[id] = msg;
363 }
364 }
365}
366
367void FetchJobPrivate::parseBodyStructure(const QByteArray &structure, int &pos, KMime::Content *content)
368{
369 skipLeadingSpaces(structure, pos);
370
371 if (structure[pos] != '(') {
372 return;
373 }
374
375 pos++;
376
377 if (structure[pos] != '(') { // simple part
378 pos--;
379 parsePart(structure, pos, content);
380 } else { // multi part
381 content->contentType()->setMimeType("MULTIPART/MIXED");
382 while (pos < structure.size() && structure[pos] == '(') {
383 auto child = new KMime::Content;
384 content->appendContent(child);
385 parseBodyStructure(structure, pos, child);
386 child->assemble();
387 }
388
389 QByteArray subType = parseString(structure, pos);
390 content->contentType()->setMimeType("MULTIPART/" + subType);
391
392 QByteArray parameters = parseSentence(structure, pos); // FIXME: Read the charset
393 if (parameters.contains("BOUNDARY")) {
394 content->contentType()->setBoundary(parameters.remove(0, parameters.indexOf("BOUNDARY") + 11).split('\"')[0]);
395 }
396
397 QByteArray disposition = parseSentence(structure, pos);
398 if (disposition.contains("INLINE")) {
399 content->contentDisposition()->setDisposition(KMime::Headers::CDinline);
400 } else if (disposition.contains("ATTACHMENT")) {
401 content->contentDisposition()->setDisposition(KMime::Headers::CDattachment);
402 }
403
404 parseSentence(structure, pos); // Ditch the body language
405 }
406
407 // Consume what's left
408 while (pos < structure.size() && structure[pos] != ')') {
409 skipLeadingSpaces(structure, pos);
410 parseSentence(structure, pos);
411 skipLeadingSpaces(structure, pos);
412 }
413
414 pos++;
415}
416
417void FetchJobPrivate::parsePart(const QByteArray &structure, int &pos, KMime::Content *content)
418{
419 if (structure[pos] != '(') {
420 return;
421 }
422
423 pos++;
424
425 QByteArray mainType = parseString(structure, pos);
426 QByteArray subType = parseString(structure, pos);
427
428 content->contentType()->setMimeType(mainType + '/' + subType);
429
430 parseSentence(structure, pos); // Ditch the parameters... FIXME: Read it to get charset and name
431 parseString(structure, pos); // ... and the id
432
433 content->contentDescription()->from7BitString(parseString(structure, pos));
434
435 parseString(structure, pos); // Ditch the encoding too
436 parseString(structure, pos); // ... and the size
437 parseString(structure, pos); // ... and the line count
438
439 QByteArray disposition = parseSentence(structure, pos);
440 if (disposition.contains("INLINE")) {
441 content->contentDisposition()->setDisposition(KMime::Headers::CDinline);
442 } else if (disposition.contains("ATTACHMENT")) {
443 content->contentDisposition()->setDisposition(KMime::Headers::CDattachment);
444 }
445 if ((content->contentDisposition()->disposition() == KMime::Headers::CDattachment
446 || content->contentDisposition()->disposition() == KMime::Headers::CDinline)
447 && disposition.contains("FILENAME")) {
448 QByteArray filename = disposition.remove(0, disposition.indexOf("FILENAME") + 11).split('\"')[0];
449 content->contentDisposition()->setFilename(QLatin1StringView(filename));
450 }
451
452 // Consume what's left
453 while (pos < structure.size() && structure[pos] != ')') {
454 skipLeadingSpaces(structure, pos);
455 parseSentence(structure, pos);
456 skipLeadingSpaces(structure, pos);
457 }
458}
459
460QByteArray FetchJobPrivate::parseSentence(const QByteArray &structure, int &pos)
461{
462 QByteArray result;
463 int stack = 0;
464
465 skipLeadingSpaces(structure, pos);
466
467 if (structure[pos] != '(') {
468 return parseString(structure, pos);
469 }
470
471 int start = pos;
472
473 do {
474 switch (structure[pos]) {
475 case '(':
476 pos++;
477 stack++;
478 break;
479 case ')':
480 pos++;
481 stack--;
482 break;
483 case '[':
484 pos++;
485 stack++;
486 break;
487 case ']':
488 pos++;
489 stack--;
490 break;
491 default:
492 skipLeadingSpaces(structure, pos);
493 parseString(structure, pos);
494 skipLeadingSpaces(structure, pos);
495 break;
496 }
497 } while (pos < structure.size() && stack != 0);
498
499 result = structure.mid(start, pos - start);
500
501 return result;
502}
503
504QByteArray FetchJobPrivate::parseString(const QByteArray &structure, int &pos)
505{
506 QByteArray result;
507
508 skipLeadingSpaces(structure, pos);
509
510 int start = pos;
511 bool foundSlash = false;
512
513 // quoted string
514 if (structure[pos] == '"') {
515 pos++;
516 for (;;) {
517 if (structure[pos] == '\\') {
518 pos += 2;
519 foundSlash = true;
520 continue;
521 }
522 if (structure[pos] == '"') {
523 result = structure.mid(start + 1, pos - start - 1);
524 pos++;
525 break;
526 }
527 pos++;
528 }
529 } else { // unquoted string
530 for (;;) {
531 if (structure[pos] == ' ' || structure[pos] == '(' || structure[pos] == ')' || structure[pos] == '[' || structure[pos] == ']'
532 || structure[pos] == '\n' || structure[pos] == '\r' || structure[pos] == '"') {
533 break;
534 }
535 if (structure[pos] == '\\') {
536 foundSlash = true;
537 }
538 pos++;
539 }
540
541 result = structure.mid(start, pos - start);
542
543 // transform unquoted NIL
544 if (result == "NIL") {
545 result.clear();
546 }
547 }
548
549 // simplify slashes
550 if (foundSlash) {
551 while (result.contains("\\\"")) {
552 result.replace("\\\"", "\"");
553 }
554 while (result.contains("\\\\")) {
555 result.replace("\\\\", "\\");
556 }
557 }
558
559 return result;
560}
561
562void FetchJobPrivate::skipLeadingSpaces(const QByteArray &structure, int &pos)
563{
564 while (pos < structure.size() && structure[pos] == ' ') {
565 pos++;
566 }
567}
568
569#include "moc_fetchjob.cpp"
KIMAP::FetchJob::FetchScope
Used to indicate what message data should be fetched.
Definition fetchjob.h:75
KIMAP::FetchJob::FetchScope::FullHeaders
@ FullHeaders
Fetch message size (in octets), internal date of the message, flags, UID and all RFC822 headers.
Definition fetchjob.h:143
KIMAP::FetchJob::FetchScope::Full
@ Full
Fetch the complete message.
Definition fetchjob.h:115
KIMAP::FetchJob::FetchScope::Headers
@ Headers
Fetch RFC-2822 or MIME message headers.
Definition fetchjob.h:96
KIMAP::FetchJob::FetchScope::Structure
@ Structure
Fetch the MIME message body structure (the UID is also fetched)
Definition fetchjob.h:104
KIMAP::FetchJob::FetchScope::Content
@ Content
Fetch the message content (the UID is also fetched)
Definition fetchjob.h:111
KIMAP::FetchJob::FetchScope::HeaderAndContent
@ HeaderAndContent
Fetch the message MIME headers and the content of parts specified in the parts field.
Definition fetchjob.h:133
KIMAP::FetchJob::FetchScope::Flags
@ Flags
Fetch the message flags (the UID is also fetched)
Definition fetchjob.h:100
KIMAP::FetchJob
Fetch message data from the server.
Definition fetchjob.h:60
KIMAP::FetchJob::setUidBased
void setUidBased(bool uidBased)
Set how the sequence set should be interpreted.
Definition fetchjob.cpp:118
KIMAP::FetchJob::sequenceSet
ImapSet sequenceSet() const
The messages that will be fetched.
Definition fetchjob.cpp:112
KIMAP::FetchJob::messagesVanished
void messagesVanished(const KIMAP::ImapSet &uids)
Provides vanished messages.
KIMAP::FetchJob::scope
FetchScope scope() const
Specifies what data will be fetched.
Definition fetchjob.cpp:136
KIMAP::FetchJob::setSequenceSet
void setSequenceSet(const ImapSet &set)
Set which messages to fetch data for.
Definition fetchjob.cpp:105
KIMAP::FetchJob::mailBox
QString mailBox() const
Returns the name of the mailbox the fetch job is executed on.
Definition fetchjob.cpp:154
KIMAP::FetchJob::setScope
void setScope(const FetchScope &scope)
Sets what data should be fetched.
Definition fetchjob.cpp:130
KIMAP::FetchJob::isUidBased
bool isUidBased() const
How to interpret the sequence set.
Definition fetchjob.cpp:124
KIMAP::FetchJob::setGmailExtensionsEnabled
bool setGmailExtensionsEnabled() const
Returns whether Gmail support is enabled.
Definition fetchjob.cpp:142
KIMAP::ImapSet
Represents a set of natural numbers (1->∞) in a as compact as possible form.
Definition imapset.h:127
KIMAP::ImapSet::isEmpty
bool isEmpty() const
Returns true if this set doesn't contains any values.
Definition imapset.cpp:305
KIMAP::ImapSet::fromImapSequenceSet
static ImapSet fromImapSequenceSet(const QByteArray &sequence)
Return the set corresponding to the given IMAP-compatible QByteArray representation.
Definition imapset.cpp:285
KMime::Content::contentType
const Headers::ContentType * contentType() const
KMime::Content::contentDisposition
const Headers::ContentDisposition * contentDisposition() const
KMime::Content::appendContent
void appendContent(Content *content)
KMime::Content::contentDescription
const Headers::ContentDescription * contentDescription() const
KMime::Headers::ContentDisposition::setDisposition
void setDisposition(contentDisposition disp)
KMime::Headers::ContentDisposition::disposition
contentDisposition disposition() const
KMime::Headers::ContentDisposition::setFilename
void setFilename(const QString &filename)
KMime::Headers::ContentType::setMimeType
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KMime::Headers::ContentType::setBoundary
void setBoundary(const QByteArray &s)
KMime::Headers::Generics::Unstructured::from7BitString
void from7BitString(QByteArrayView s) override
start
Q_SCRIPTABLE Q_NOREPLY void start()
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QByteArray::clear
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QByteArray::contains
bool contains(QByteArrayView bv) const const
QByteArray::endsWith
bool endsWith(QByteArrayView bv) const const
QByteArray::indexOf
qsizetype indexOf(QByteArrayView bv, qsizetype from) const const
QByteArray::isEmpty
bool isEmpty() const const
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QByteArray mid(qsizetype pos, qsizetype len) const const
QByteArray::number
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QByteArray::replace
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QByteArray::size
qsizetype size() const const
QByteArray::split
QList< QByteArray > split(char sep) const const
QByteArray::startsWith
bool startsWith(QByteArrayView bv) const const
QByteArray::trimmed
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QList::ConstIterator
typedef ConstIterator
QList::constBegin
const_iterator constBegin() const const
QList::constEnd
const_iterator constEnd() const const
QMap::contains
bool contains(const Key &key) const const
QMap::insert
iterator insert(const Key &key, const T &value)
QObject::Q_EMIT
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Q_D
Q_D(Todo)
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