data/FolderEvidenceModel.cpp - GCC Code Coverage Report

Directory:	src/
Coverage:	low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%

	Coverage	Exec / Excl / Total
Lines:	89.4%	93 / 0 / 104
Functions:	81.8%	9 / 0 / 11
Branches:	80.1%	137 / 0 / 171

    data/FolderEvidenceModel.cpp
    
        Line
        Branch
        Exec
        Source
      
        #include "FolderEvidenceModel.h"
      
        #include "MailCacheSql.h"
      
        #include "Models.h"
      
        #include <QElapsedTimer>
      
        #include <QLoggingCategory>
      
        #include <QMutexLocker>
      
        #include <QSqlError>
      
        #include <QSqlQuery>
      
        #include <QTimeZone>
      
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        528
        Q_LOGGING_CATEGORY(lcFolderEvidence, "mailjd.predictor.evidence")
      
        15953
        const QStringList &FolderEvidenceModel::excludedFolders() {
      
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        16129
          static const QStringList folders = {"INBOX", "Sent", "Trash", "Drafts", "Archive", "Junk", "Spam"};
      
        15953
          return folders;
      
        22
        }
      
        15221
        bool FolderEvidenceModel::excludedFolder(const QString &path) {
      
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        26085
          for (const QString &folder : excludedFolders())
      
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        36024
            if (path.compare(folder, Qt::CaseInsensitive) == 0 || path.startsWith(folder + QLatin1Char('.'), Qt::CaseInsensitive)
      
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        36024
                || path.startsWith(folder + QLatin1Char('/'), Qt::CaseInsensitive)
      
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        36023
                || path.endsWith(QLatin1Char('.') + folder, Qt::CaseInsensitive)
      
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        36024
                || path.endsWith(QLatin1Char('/') + folder, Qt::CaseInsensitive))
      
        14294
              return true;
      
        927
          return false;
      
        }
      
        903
        bool FolderEvidenceModel::built(const QString &account) const {
      
        903
          QMutexLocker locker(&m_mutex);
      
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        903
          return m_stats.revision > 0 && m_account == account;
      
        903
        }
      
        433
        bool FolderEvidenceModel::learnRows(const QSqlDatabase &db, qint64 afterId, bool replay, QString *error) {
      
          // Bounded fields (8 KiB like the predictor's reader); date order.
      
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        433
          QSqlQuery query(db);
      
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        433
          query.setForwardOnly(true);
      
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        433
          query.prepare(QStringLiteral(
      
              "SELECT h.id, f.path, substr(h.from_addr,1,8192), substr(h.to_addr,1,8192), substr(h.cc_addr,1,8192), "
      
              "substr(h.subject,1,8192), substr(h.list_id,1,1024), substr(h.message_id,1,1024), substr(h.in_reply_to,1,8192), "
      
              "substr(h.ref_ids,1,8192), h.date FROM headers h JOIN folders f ON f.id = h.folder_id "
      
              "WHERE f.account = ? AND h.id > ? ORDER BY h.date, h.id"));
      
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        433
          query.addBindValue(m_account);
      
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        433
          query.addBindValue(afterId);
      
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        433
          if (!query.exec()) {
      
        ✗
            if (error) *error = query.lastError().text();
      
        ✗
            return false;
      
          }
      
        433
          QList<FolderReplayItem> items;
      
        433
          qint64 last = afterId;
      
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        15598
          while (query.next()) {
      
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        15165
            last = std::max(last, query.value(0).toLongLong());
      
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        15165
            const QString path = query.value(1).toString();
      
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        15165
            if (excludedFolder(path)) continue;
      
        889
            MailHeader header;
      
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        889
            header.from = query.value(2).toString();
      
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        889
            header.to = query.value(3).toString();
      
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        889
            header.cc = query.value(4).toString();
      
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        889
            header.subject = query.value(5).toString();
      
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        889
            header.listId = query.value(6).toString();
      
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        889
            header.messageId = query.value(7).toString();
      
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        889
            header.inReplyToIds = MailCacheSql::decodeThreadIds(query.value(8).toString());
      
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        889
            header.references = MailCacheSql::decodeThreadIds(query.value(9).toString());
      
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        889
            if (!query.value(10).isNull()) header.date = QDateTime::fromSecsSinceEpoch(query.value(10).toLongLong(), QTimeZone::utc());
      
        889
            items.append({FolderEvidence::fromHeader(header), path});
      
        15165
          }
      
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        433
          if (replay) {
      
            // The replay trains and calibrates in one pass (out of sample).
      
        264
            m_evidence = FolderEvidence();
      
        264
            m_calibration = FolderCalibration();
      
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        264
            const FolderReplayMetrics metrics = replayFolderEvidence(items, 0.0, &m_calibration, &m_evidence);
      
            // A threshold measured on a handful of filings says nothing; below
      
            // MinReplayAnswers the long-standing 0.4 of the word model applies.
      
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        264
            m_stats.threshold = metrics.answered >= MinReplayAnswers ? metrics.thresholdFor(0.85) : FolderSuggestion().threshold;
      
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        264
            const auto [coverage, precision] = metrics.at(m_stats.threshold);
      
        264
            m_stats.replayCoverage = coverage;
      
        264
            m_stats.replayPrecision = precision;
      
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        1056
            qCInfo(lcFolderEvidence).noquote() << QStringLiteral("replay %1; threshold %2").arg(metrics.report()).arg(m_stats.threshold);
      
        264
          } else {
      
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        169
            for (const FolderReplayItem &item : std::as_const(items)) m_evidence.learn(item.mail, item.folder);
      
          }
      
        433
          m_lastHeaderId = last;
      
        433
          m_stats.filings = m_evidence.filings();
      
        433
          return true;
      
        1322
        }
      
        264
        bool FolderEvidenceModel::build(const QSqlDatabase &db, const QString &account, QString *error) {
      
        264
          QMutexLocker locker(&m_mutex);
      
        264
          QElapsedTimer timer;
      
        264
          timer.start();
      
        264
          m_account = account;
      
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        264
          if (!learnRows(db, 0, true, error)) return false;
      
        264
          m_stats.buildMs = timer.elapsed();
      
        264
          ++m_stats.revision;
      
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        528
          qCInfo(lcFolderEvidence) << "evidence built:" << m_stats.filings << "filings in" << m_stats.buildMs << "ms";
      
        264
          return true;
      
        264
        }
      
        169
        bool FolderEvidenceModel::update(const QSqlDatabase &db, QString *error) {
      
        169
          QMutexLocker locker(&m_mutex);
      
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        338
          return learnRows(db, m_lastHeaderId, false, error);
      
        169
        }
      
        37
        void FolderEvidenceModel::correct(const MailHeader &header, const QString &chosenFolder) {
      
        37
          QMutexLocker locker(&m_mutex);
      
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        37
          m_evidence.correct(FolderEvidence::fromHeader(header), chosenFolder);
      
        37
        }
      
        ✗
        void FolderEvidenceModel::renameFolder(const QString &from, const QString &to) {
      
        ✗
          QMutexLocker locker(&m_mutex);
      
        ✗
          m_evidence.renameFolder(from, to);
      
        ✗
        }
      
        616
        FolderSuggestion FolderEvidenceModel::suggest(const MailHeader &header, const QString &junkFolder) const {
      
        616
          QMutexLocker locker(&m_mutex);
      
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        616
          const QList<FolderEvidence::Candidate> ranked = m_evidence.rank(FolderEvidence::fromHeader(header));
      
        616
          QList<FolderSuggestion::Candidate> scores;
      
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        1049
          for (const FolderEvidence::Candidate &candidate : ranked.mid(0, 2))
      
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        1049
            scores.append({candidate.folder, m_calibration.confidence(candidate.kind, candidate.strength)});
      
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        616
          FolderSuggestion suggestion = FolderSuggestion::fromScores(scores, header.isSpam, junkFolder);
      
        616
          suggestion.threshold = m_stats.threshold;
      
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        616
          if (!ranked.isEmpty() && suggestion.primary.first == ranked.first().folder) {
      
        334
            suggestion.reason = int(ranked.first().kind);
      
        334
            suggestion.support = ranked.first().support;
      
        334
            suggestion.total = ranked.first().total;
      
            // The alternate is never shown as more certain than the primary.
      
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        334
            if (!suggestion.alternate.first.isEmpty())
      
        99
              suggestion.alternate.second = std::min(suggestion.alternate.second, suggestion.primary.second);
      
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        282
          } else if (header.isSpam && suggestion.primary.first == junkFolder) {
      
        ✗
            suggestion.reason = FolderSuggestion::SpamFilter;
      
          }
      
        616
          return suggestion;
      
        616
        }
      
        ✗
        FolderEvidenceModel::Stats FolderEvidenceModel::stats() const {
      
        ✗
          QMutexLocker locker(&m_mutex);
      
        ✗
          return m_stats;
      
        ✗
        }

Line	Branch	Exec	Source
1			#include "FolderEvidenceModel.h"
2
3			#include "MailCacheSql.h"
4			#include "Models.h"
5
6			#include <QElapsedTimer>
7			#include <QLoggingCategory>
8			#include <QMutexLocker>
9			#include <QSqlError>
10			#include <QSqlQuery>
11			#include <QTimeZone>
12
13	4/7 ✓ Branch 2 → 3 taken 13 times. ✓ Branch 2 → 8 taken 515 times. ✓ Branch 4 → 5 taken 13 times. ✗ Branch 4 → 8 not taken. ✓ Branch 5 → 6 taken 13 times. ✗ Branch 10 → 11 not taken. ✗ Branch 10 → 12 not taken.	528	Q_LOGGING_CATEGORY(lcFolderEvidence, "mailjd.predictor.evidence")
14
15		15953	const QStringList &FolderEvidenceModel::excludedFolders() {
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17		15953	return folders;
18		22	}
19
20		15221	bool FolderEvidenceModel::excludedFolder(const QString &path) {
21	3/3 ✓ Branch 2 → 3 taken 15221 times. ✓ Branch 42 → 5 taken 25158 times. ✓ Branch 42 → 43 taken 927 times.	26085	for (const QString &folder : excludedFolders())
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25	9/12 ✓ Branch 7 → 8 taken 10866 times. ✓ Branch 7 → 28 taken 14292 times. ✓ Branch 25 → 26 taken 10864 times. ✓ Branch 26 → 27 taken 10864 times. ✗ Branch 27 → 28 not taken. ✓ Branch 27 → 29 taken 10864 times. ✓ Branch 30 → 31 taken 10864 times. ✓ Branch 30 → 32 taken 14294 times. ✓ Branch 32 → 33 taken 10865 times. ✓ Branch 32 → 34 taken 14293 times. ✗ Branch 45 → 46 not taken. ✗ Branch 45 → 47 not taken.	36024	\|\| path.endsWith(QLatin1Char('/') + folder, Qt::CaseInsensitive))
26		14294	return true;
27		927	return false;
28			}
29
30		903	bool FolderEvidenceModel::built(const QString &account) const {
31		903	QMutexLocker locker(&m_mutex);
32	3/4 ✓ Branch 3 → 4 taken 375 times. ✓ Branch 3 → 7 taken 528 times. ✓ Branch 5 → 6 taken 375 times. ✗ Branch 5 → 7 not taken.	903	return m_stats.revision > 0 && m_account == account;
33		903	}
34
35		433	bool FolderEvidenceModel::learnRows(const QSqlDatabase &db, qint64 afterId, bool replay, QString *error) {
36			// Bounded fields (8 KiB like the predictor's reader); date order.
37	1/1 ✓ Branch 2 → 3 taken 433 times.	433	QSqlQuery query(db);
38	1/1 ✓ Branch 3 → 4 taken 433 times.	433	query.setForwardOnly(true);
39	1/1 ✓ Branch 7 → 8 taken 433 times.	433	query.prepare(QStringLiteral(
40			"SELECT h.id, f.path, substr(h.from_addr,1,8192), substr(h.to_addr,1,8192), substr(h.cc_addr,1,8192), "
41			"substr(h.subject,1,8192), substr(h.list_id,1,1024), substr(h.message_id,1,1024), substr(h.in_reply_to,1,8192), "
42			"substr(h.ref_ids,1,8192), h.date FROM headers h JOIN folders f ON f.id = h.folder_id "
43			"WHERE f.account = ? AND h.id > ? ORDER BY h.date, h.id"));
44	1/1 ✓ Branch 12 → 13 taken 433 times.	433	query.addBindValue(m_account);
45	1/1 ✓ Branch 16 → 17 taken 433 times.	433	query.addBindValue(afterId);
46	2/3 ✓ Branch 18 → 19 taken 433 times. ✗ Branch 19 → 20 not taken. ✓ Branch 19 → 28 taken 433 times.	433	if (!query.exec()) {
47		✗	if (error) *error = query.lastError().text();
48		✗	return false;
49			}
50		433	QList<FolderReplayItem> items;
51		433	qint64 last = afterId;
52	3/3 ✓ Branch 108 → 109 taken 15598 times. ✓ Branch 109 → 29 taken 15165 times. ✓ Branch 109 → 110 taken 433 times.	15598	while (query.next()) {
53	2/2 ✓ Branch 29 → 30 taken 15165 times. ✓ Branch 30 → 31 taken 15165 times.	15165	last = std::max(last, query.value(0).toLongLong());
54	2/2 ✓ Branch 33 → 34 taken 15165 times. ✓ Branch 34 → 35 taken 15165 times.	15165	const QString path = query.value(1).toString();
55	3/3 ✓ Branch 36 → 37 taken 15165 times. ✓ Branch 37 → 38 taken 14276 times. ✓ Branch 37 → 39 taken 889 times.	15165	if (excludedFolder(path)) continue;
56		889	MailHeader header;
57	2/2 ✓ Branch 40 → 41 taken 889 times. ✓ Branch 41 → 42 taken 889 times.	889	header.from = query.value(2).toString();
58	2/2 ✓ Branch 45 → 46 taken 889 times. ✓ Branch 46 → 47 taken 889 times.	889	header.to = query.value(3).toString();
59	2/2 ✓ Branch 50 → 51 taken 889 times. ✓ Branch 51 → 52 taken 889 times.	889	header.cc = query.value(4).toString();
60	2/2 ✓ Branch 55 → 56 taken 889 times. ✓ Branch 56 → 57 taken 889 times.	889	header.subject = query.value(5).toString();
61	2/2 ✓ Branch 60 → 61 taken 889 times. ✓ Branch 61 → 62 taken 889 times.	889	header.listId = query.value(6).toString();
62	2/2 ✓ Branch 65 → 66 taken 889 times. ✓ Branch 66 → 67 taken 889 times.	889	header.messageId = query.value(7).toString();
63	3/3 ✓ Branch 70 → 71 taken 889 times. ✓ Branch 71 → 72 taken 889 times. ✓ Branch 72 → 73 taken 889 times.	889	header.inReplyToIds = MailCacheSql::decodeThreadIds(query.value(8).toString());
64	3/3 ✓ Branch 77 → 78 taken 889 times. ✓ Branch 78 → 79 taken 889 times. ✓ Branch 79 → 80 taken 889 times.	889	header.references = MailCacheSql::decodeThreadIds(query.value(9).toString());
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66		889	items.append({FolderEvidence::fromHeader(header), path});
67		15165	}
68	2/2 ✓ Branch 110 → 111 taken 264 times. ✓ Branch 110 → 154 taken 169 times.	433	if (replay) {
69			// The replay trains and calibrates in one pass (out of sample).
70		264	m_evidence = FolderEvidence();
71		264	m_calibration = FolderCalibration();
72	1/1 ✓ Branch 117 → 118 taken 264 times.	264	const FolderReplayMetrics metrics = replayFolderEvidence(items, 0.0, &m_calibration, &m_evidence);
73			// A threshold measured on a handful of filings says nothing; below
74			// MinReplayAnswers the long-standing 0.4 of the word model applies.
75	6/8 ✓ Branch 118 → 119 taken 1 time. ✓ Branch 118 → 121 taken 263 times. ✓ Branch 119 → 120 taken 1 time. ✓ Branch 121 → 122 taken 263 times. ✓ Branch 123 → 124 taken 263 times. ✓ Branch 123 → 125 taken 1 time. ✗ Branch 252 → 253 not taken. ✗ Branch 252 → 254 not taken.	264	m_stats.threshold = metrics.answered >= MinReplayAnswers ? metrics.thresholdFor(0.85) : FolderSuggestion().threshold;
76	1/1 ✓ Branch 125 → 126 taken 264 times.	264	const auto [coverage, precision] = metrics.at(m_stats.threshold);
77		264	m_stats.replayCoverage = coverage;
78		264	m_stats.replayPrecision = precision;
79	8/8 ✓ Branch 128 → 129 taken 264 times. ✓ Branch 132 → 133 taken 264 times. ✓ Branch 138 → 139 taken 264 times. ✓ Branch 139 → 140 taken 264 times. ✓ Branch 141 → 142 taken 264 times. ✓ Branch 142 → 143 taken 264 times. ✓ Branch 151 → 130 taken 264 times. ✓ Branch 151 → 152 taken 264 times.	1056	qCInfo(lcFolderEvidence).noquote() << QStringLiteral("replay %1; threshold %2").arg(metrics.report()).arg(m_stats.threshold);
80		264	} else {
81	1/3 ✗ Branch 158 → 159 not taken. ✗ Branch 161 → 157 not taken. ✓ Branch 161 → 162 taken 169 times.	169	for (const FolderReplayItem &item : std::as_const(items)) m_evidence.learn(item.mail, item.folder);
82			}
83		433	m_lastHeaderId = last;
84		433	m_stats.filings = m_evidence.filings();
85		433	return true;
86		1322	}
87
88		264	bool FolderEvidenceModel::build(const QSqlDatabase &db, const QString &account, QString *error) {
89		264	QMutexLocker locker(&m_mutex);
90		264	QElapsedTimer timer;
91		264	timer.start();
92		264	m_account = account;
93	2/3 ✓ Branch 5 → 6 taken 264 times. ✗ Branch 6 → 7 not taken. ✓ Branch 6 → 8 taken 264 times.	264	if (!learnRows(db, 0, true, error)) return false;
94		264	m_stats.buildMs = timer.elapsed();
95		264	++m_stats.revision;
96	9/9 ✓ Branch 9 → 10 taken 264 times. ✓ Branch 13 → 14 taken 264 times. ✓ Branch 14 → 15 taken 264 times. ✓ Branch 15 → 16 taken 264 times. ✓ Branch 16 → 17 taken 264 times. ✓ Branch 17 → 18 taken 264 times. ✓ Branch 18 → 19 taken 264 times. ✓ Branch 22 → 11 taken 264 times. ✓ Branch 22 → 23 taken 264 times.	528	qCInfo(lcFolderEvidence) << "evidence built:" << m_stats.filings << "filings in" << m_stats.buildMs << "ms";
97		264	return true;
98		264	}
99
100		169	bool FolderEvidenceModel::update(const QSqlDatabase &db, QString *error) {
101		169	QMutexLocker locker(&m_mutex);
102	1/1 ✓ Branch 3 → 4 taken 169 times.	338	return learnRows(db, m_lastHeaderId, false, error);
103		169	}
104
105		37	void FolderEvidenceModel::correct(const MailHeader &header, const QString &chosenFolder) {
106		37	QMutexLocker locker(&m_mutex);
107	2/2 ✓ Branch 3 → 4 taken 37 times. ✓ Branch 4 → 5 taken 37 times.	37	m_evidence.correct(FolderEvidence::fromHeader(header), chosenFolder);
108		37	}
109
110		✗	void FolderEvidenceModel::renameFolder(const QString &from, const QString &to) {
111		✗	QMutexLocker locker(&m_mutex);
112		✗	m_evidence.renameFolder(from, to);
113		✗	}
114
115		616	FolderSuggestion FolderEvidenceModel::suggest(const MailHeader &header, const QString &junkFolder) const {
116		616	QMutexLocker locker(&m_mutex);
117	2/2 ✓ Branch 3 → 4 taken 616 times. ✓ Branch 4 → 5 taken 616 times.	616	const QList<FolderEvidence::Candidate> ranked = m_evidence.rank(FolderEvidence::fromHeader(header));
118		616	QList<FolderSuggestion::Candidate> scores;
119	5/5 ✓ Branch 6 → 7 taken 616 times. ✓ Branch 7 → 8 taken 616 times. ✓ Branch 8 → 9 taken 616 times. ✓ Branch 17 → 10 taken 433 times. ✓ Branch 17 → 18 taken 616 times.	1049	for (const FolderEvidence::Candidate &candidate : ranked.mid(0, 2))
120	2/2 ✓ Branch 11 → 12 taken 433 times. ✓ Branch 13 → 14 taken 433 times.	1049	scores.append({candidate.folder, m_calibration.confidence(candidate.kind, candidate.strength)});
121	1/1 ✓ Branch 19 → 20 taken 616 times.	616	FolderSuggestion suggestion = FolderSuggestion::fromScores(scores, header.isSpam, junkFolder);
122		616	suggestion.threshold = m_stats.threshold;
123	5/6 ✓ Branch 21 → 22 taken 334 times. ✓ Branch 21 → 26 taken 282 times. ✓ Branch 24 → 25 taken 334 times. ✗ Branch 24 → 26 not taken. ✓ Branch 27 → 28 taken 334 times. ✓ Branch 27 → 35 taken 282 times.	616	if (!ranked.isEmpty() && suggestion.primary.first == ranked.first().folder) {
124		334	suggestion.reason = int(ranked.first().kind);
125		334	suggestion.support = ranked.first().support;
126		334	suggestion.total = ranked.first().total;
127			// The alternate is never shown as more certain than the primary.
128	2/2 ✓ Branch 32 → 33 taken 99 times. ✓ Branch 32 → 42 taken 235 times.	334	if (!suggestion.alternate.first.isEmpty())
129		99	suggestion.alternate.second = std::min(suggestion.alternate.second, suggestion.primary.second);
130	4/6 ✓ Branch 35 → 36 taken 1 time. ✓ Branch 35 → 39 taken 281 times. ✗ Branch 37 → 38 not taken. ✓ Branch 37 → 39 taken 1 time. ✗ Branch 40 → 41 not taken. ✓ Branch 40 → 42 taken 282 times.	282	} else if (header.isSpam && suggestion.primary.first == junkFolder) {
131		✗	suggestion.reason = FolderSuggestion::SpamFilter;
132			}
133		616	return suggestion;
134		616	}
135
136		✗	FolderEvidenceModel::Stats FolderEvidenceModel::stats() const {
137		✗	QMutexLocker locker(&m_mutex);
138		✗	return m_stats;
139		✗	}
140