MailJDTourDownloadDocsQualityTestsCoverage

Which source lines and branches the tests execute. Lines 91.5 %, branches 75.0 % (minimum 85 % and 72 %). main @ 399ffe3d · 21 October 2026 · pipeline 7238.

GCC Code Coverage Report

Directory: src/
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 94.9% 166 / 0 / 175
Functions: 91.3% 21 / 0 / 23
Branches: 71.1% 239 / 0 / 336
service/FolderPredictionService.cpp
Line Branch Exec Source
1 #include "FolderPredictionService.h"
2 #include "data/FolderPredictor.h"
3 #include "data/FolderSuggestionStore.h"
4 #include "data/MailCache.h"
5 #include <QCoreApplication>
6 #include <QElapsedTimer>
7 #include <QFileInfo>
8 #include <QFutureWatcher>
9 #include <QLoggingCategory>
10 #include <QSet>
11 #include <QtConcurrent>
12 #include <algorithm>
13
14
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 389 Q_LOGGING_CATEGORY(lcFolderPrediction, "mailjd.predictor.service")
15
16
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 35 FolderPredictionService::FolderPredictionService(QObject *parent) : QObject(parent) {
17
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 35 m_pool.setMaxThreadCount(1);
18
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 35 m_pool.setExpiryTimeout(1000);
19
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 35 connect(QCoreApplication::instance(), &QCoreApplication::aboutToQuit,
20 36 this, [this] { stop(); });
21 35 }
22 57 FolderPredictionService::~FolderPredictionService() { stop(); }
23 10348 FolderPredictionService *FolderPredictionService::shared() {
24
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 10348 static QPointer<FolderPredictionService> service;
25
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 10348 if (!service) service = new FolderPredictionService(QCoreApplication::instance());
26 10348 return service;
27 }
28 36 void FolderPredictionService::stop() {
29 36 m_stopping = true;
30
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 42 for (const auto &request : m_pending) disconnect(request.destroyed);
31 36 m_pending.clear();
32
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 36 if (m_active) {
33 1 m_active->cancelled->store(true);
34 1 disconnect(m_active->destroyed);
35 }
36
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 36 m_pool.waitForDone();
37 36 }
38 10396 void FolderPredictionService::cancel(QObject *owner) {
39
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 10396 if (m_active && m_active->owner == owner) m_active->cancelled->store(true);
40 10396 m_pending.removeIf([this, owner](const Request &request) {
41
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 507 if (request.owner && request.owner != owner) return false;
42 21 disconnect(request.destroyed);
43 21 return true;
44 });
45 10396 }
46 468 void FolderPredictionService::predict(QObject *owner, FolderPredictionRequest input,
47 Callback callback) {
48
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 468 cancel(owner);
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 474 if (!owner) return;
50 2322 const auto invalidText = [](const QString &text) {
51
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 2322 return text.size() > 4096 || text.contains(QChar::Null);
52 };
53
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 935 if (m_stopping || m_pending.size() >= MaxPending || input.folderId <= 0 ||
54
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 1401 input.cachePath.isEmpty() || input.predictorPath.isEmpty() ||
55
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 1401 input.account.isEmpty() || input.folder.isEmpty() ||
56
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 933 input.uids.isEmpty() || input.uids.size() > MaxRows ||
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 465 invalidText(input.cachePath) || invalidText(input.predictorPath) ||
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 1399 invalidText(input.account) || invalidText(input.folder) || invalidText(input.junkFolder) ||
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 1280 std::any_of(input.uids.cbegin(), input.uids.cend(), [](qint64 uid) { return uid <= 0; })) {
60 6 callback({{}, QStringLiteral("Folder prediction is unavailable or exceeds its identity budget"), input.uidValidity});
61 6 return;
62 }
63
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 462 Request request{owner, std::move(input), std::move(callback)};
64 462 const auto cancelled = request.cancelled;
65
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 536 request.destroyed = connect(owner, &QObject::destroyed, this, [cancelled] { cancelled->store(true); });
66
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 462 m_pending.append(std::move(request));
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 462 startNext();
68 474 }
69 896 void FolderPredictionService::startNext() {
70
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 1292 if (m_stopping || m_active) return;
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 831 if (m_warming) return;
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 831 cancel(nullptr);
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 831 if (m_pending.isEmpty()) { startWarm(); return; }
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 435 m_active = m_pending.takeFirst();
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 435 auto *watcher = new QFutureWatcher<FolderPredictionResult>(this);
76
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 435 connect(watcher, &QFutureWatcher<FolderPredictionResult>::finished, this, [this, watcher] {
77 434 auto request = std::move(*m_active);
78 434 m_active.reset();
79
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 434 auto result = watcher->result();
80
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 434 if (result.provisional && !m_stopping)
81 1 m_warm.append({request.input.cachePath, request.input.account});
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 434 watcher->deleteLater();
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 434 disconnect(request.destroyed);
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 434 QPointer<FolderPredictionService> guard(this);
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 434 if (!m_stopping && request.owner && !request.cancelled->load())
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 282 request.callback(std::move(result));
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 434 if (guard) startNext();
88
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 435 });
89 435 const auto input = m_active->input;
90 435 const auto cancelled = m_active->cancelled;
91 435 const auto statistics = m_statistics;
92
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 435 const auto model = modelFor(input.cachePath, input.account);
93
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 435 watcher->setFuture(QtConcurrent::run(&m_pool, [input, cancelled, statistics, model] {
94 435 return classify(input, *cancelled, statistics, *model);
95 }));
96 435 }
97
98 // Runs on the worker. Evidence first (S105.3.1); the Naive Bayes word model
99 // answers only for mails the evidence knows nothing about (an empty or not
100 // yet synchronised filing history), as before.
101 435 FolderPredictionResult FolderPredictionService::classify(const FolderPredictionRequest &input,
102 const std::atomic_bool &cancelled,
103 const std::shared_ptr<FolderPredictor::StatisticsCache> &statistics,
104 FolderEvidenceModel &model) {
105 435 FolderPredictionResult result;
106 435 result.uidValidity = input.uidValidity;
107
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 435 if (cancelled.load()) return result;
108 434 QElapsedTimer timer;
109 434 timer.start();
110 // The training session owns the predictor file; without it there is
111 // no model to answer from (and nothing is created here).
112
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 434 if (!QFileInfo(input.predictorPath).isFile()) {
113 1 result.error = QStringLiteral("Folder prediction database is unavailable");
114 1 return result;
115 }
116
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 433 FolderSuggestionStore store;
117 433 QString storeError;
118
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 433 const bool stored = store.open(input.predictorPath, &storeError);
119
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 433 if (!stored) qCWarning(lcFolderPrediction).noquote() << "suggestion store unavailable:" << storeError;
120 // S105.3.5: until the model is built, stored suggestions answer at once.
121
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 433 if (!model.built(input.account) && stored) {
122
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 264 const auto known = store.read(input.account, input.folderId, input.uidValidity, input.uids, &storeError);
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 264 QSet<qint64> wanted(input.uids.cbegin(), input.uids.cend());
124
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 264 if (!known.isEmpty() && known.size() == wanted.size()) {
125
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 2 for (auto it = known.cbegin(); it != known.cend(); ++it)
126 1 result.items.append({{input.account, input.folderId, it.key()}, it.value()});
127 1 result.provisional = true;
128
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 2 qCInfo(lcFolderPrediction).noquote()
129
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 3 << QStringLiteral("stored suggestions answered mails=%1 ms=%2").arg(known.size()).arg(timer.elapsed());
130 1 return result;
131 }
132 265 }
133
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 432 MailCache cache;
134
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 432 if (!cache.openReadOnly(input.cachePath)) { result.error = cache.lastError(); return result; }
135 432 QString modelError;
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 432 const bool modelReady = model.built(input.account)
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 432 ? model.update(cache.database(), &modelError)
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 263 : model.build(cache.database(), input.account, &modelError);
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 432 if (!modelReady) qCWarning(lcFolderPrediction).noquote() << "evidence model unavailable:" << modelError;
140 432 const auto page = cache.training().trainingHeaders(input.account, input.folderId, input.folder,
141
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 432 input.uidValidity, input.uids);
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 432 if (!page.error.isEmpty()) { result.error = page.error; return result; }
143
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 423 if (cancelled.load()) return result;
144 390 std::optional<FolderPredictor> predictor;
145 390 QList<QPair<qint64, FolderSuggestion>> computed;
146
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 1005 for (const auto &header : page.headers) {
147
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 618 if (cancelled.load()) return FolderPredictionResult{};
148 616 FolderSuggestion suggestion;
149
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 616 if (modelReady) suggestion = model.suggest(header, input.junkFolder);
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 616 if (suggestion.primary.first.isEmpty()) {
151
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 282 if (!predictor) {
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 278 predictor.emplace();
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 278 if (!predictor->openReadOnly(input.predictorPath, statistics)) {
154 ✗ result.error = QStringLiteral("Folder prediction database is unavailable");
155 ✗ return result;
156 }
157 }
158
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 282 suggestion = predictor->suggestions(header, input.junkFolder, &result.error);
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 282 if (!result.error.isEmpty()) { result.items.clear(); return result; }
160 }
161 615 result.items.append({{input.account, input.folderId, header.uid}, suggestion});
162
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 615 computed.append({header.uid, suggestion});
163 616 }
164
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 388 if (!cache.training().trainingIdentityCurrent(input.account, input.folderId, input.folder, input.uidValidity)) {
165 ✗ result.items.clear();
166 ✗ result.error = QStringLiteral("Folder prediction mailbox identity changed");
167 ✗ return result;
168 }
169
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 388 if (stored && !store.write(input.account, input.folderId, input.uidValidity, computed, &storeError))
170 ✗ qCWarning(lcFolderPrediction).noquote() << "suggestions not stored:" << storeError;
171
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 776 qCDebug(lcFolderPrediction).noquote()
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 1164 << QStringLiteral("classified mails=%1 ms=%2").arg(computed.size()).arg(timer.elapsed());
173 388 return result;
174 1051 }
175
176 436 std::shared_ptr<FolderEvidenceModel> FolderPredictionService::modelFor(const QString &cachePath,
177 const QString &account) {
178
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 436 auto &model = m_models[cachePath + QLatin1Char('\n') + account];
179
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 436 if (!model) model = std::make_shared<FolderEvidenceModel>();
180 436 return model;
181 }
182
183 40 void FolderPredictionService::recordFiling(const QString &cachePath, const QString &account,
184 const MailHeader &header, const QString &folder) {
185
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 40 const auto model = m_models.value(cachePath + QLatin1Char('\n') + account);
186 // An unbuilt model reads the filing from the cache when it is built.
187
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 40 if (model && model->built(account)) model->correct(header, folder);
188 40 }
189
190 ✗ void FolderPredictionService::forgetAccount(const QString &account) {
191 ✗ m_models.removeIf([&account](const auto &entry) { return entry.key().endsWith(QLatin1Char('\n') + account); });
192 ✗ }
193
194 // S105.3.5: after a provisional answer the model is built in the
195 // background, then consumers are told to ask again.
196 396 void FolderPredictionService::startWarm() {
197
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 396 if (m_stopping || m_active || m_warming || m_warm.isEmpty() || !m_pending.isEmpty()) return;
198
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 1 const Warm warm = m_warm.takeFirst();
199
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 1 const auto model = modelFor(warm.cachePath, warm.account);
200
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 1 if (model->built(warm.account)) { startWarm(); return; }
201 1 m_warming = true;
202
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 1 auto *watcher = new QFutureWatcher<bool>(this);
203
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 1 connect(watcher, &QFutureWatcher<bool>::finished, this, [this, watcher, account = warm.account] {
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 1 const bool built = watcher->result();
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 1 watcher->deleteLater();
206 1 m_warming = false;
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 1 if (m_stopping) return;
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 1 QPointer<FolderPredictionService> guard(this);
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 1 if (built) emit evidenceRebuilt(account);
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 1 if (!guard) return;
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 1 startNext();
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 1 });
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 1 watcher->setFuture(QtConcurrent::run(&m_pool, [warm, model] {
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 1 MailCache cache;
215
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 1 if (!cache.openReadOnly(warm.cachePath)) return false;
216 1 QString error;
217
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 1 const bool built = model->build(cache.database(), warm.account, &error);
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 1 if (!built) qCWarning(lcFolderPrediction).noquote() << "evidence model not built:" << error;
219 1 return built;
220 1 }));
221 1 }
222