data/ICalEventAlarms.cpp
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|---|---|---|---|
| 1 | // Sprint 93 S93.5.1: VALARM reminders of events and tasks and the RFC 5545 | ||
| 2 | // DURATION grammar they use. Part of ICalEventCodec (see ICalEventCodec.cpp). | ||
| 3 | #include "ICalEventCodec.h" | ||
| 4 | |||
| 5 | #include <QRegularExpression> | ||
| 6 | #include <algorithm> | ||
| 7 | |||
| 8 | namespace ICalEventCodec { | ||
| 9 | |||
| 10 | // RFC 5545 §3.3.6 DURATION: [+-]P[nW][nD][T[nH][nM][nS]]. | ||
| 11 | 249 | bool parseDuration(const QString &text, qint64 *seconds) { | |
| 12 | 24 | static const QRegularExpression pattern(QStringLiteral( | |
| 13 |
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273 | "^([+-])?P(?:(\\d+)W)?(?:(\\d+)D)?(?:T(?:(\\d+)H)?(?:(\\d+)M)?(?:(\\d+)S)?)?$")); |
| 14 |
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249 | const auto match = pattern.match(text.trimmed().toUpper()); |
| 15 |
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249 | if (!match.hasMatch()) |
| 16 | ✗ | return false; | |
| 17 | // S106-143: every part is bounded before multiplying — an unbounded | ||
| 18 | // number overflowed qint64 (undefined behaviour) into a wrapped "valid" | ||
| 19 | // duration. 100 years is far beyond any real reminder or event length. | ||
| 20 | 249 | constexpr qint64 kMaximumSeconds = 100LL * 366 * 86400; | |
| 21 | 249 | const qint64 factors[] = {7 * 86400, 86400, 3600, 60, 1}; | |
| 22 | 249 | qint64 total = 0; | |
| 23 |
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1484 | for (int part = 0; part < 5; ++part) { |
| 24 |
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1238 | const QString digits = match.captured(part + 2); |
| 25 |
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1238 | if (digits.isEmpty()) |
| 26 | 907 | continue; | |
| 27 | 331 | bool ok = false; | |
| 28 |
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331 | const qint64 value = digits.toLongLong(&ok); |
| 29 |
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331 | if (!ok || value > kMaximumSeconds / factors[part]) |
| 30 | 3 | return false; | |
| 31 | 328 | total += value * factors[part]; | |
| 32 |
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328 | if (total > kMaximumSeconds) |
| 33 | ✗ | return false; | |
| 34 | 1238 | } | |
| 35 |
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246 | if (match.captured(1) == QLatin1String("-")) |
| 36 | 181 | total = -total; | |
| 37 | 246 | *seconds = total; | |
| 38 | 246 | return true; | |
| 39 | 249 | } | |
| 40 | |||
| 41 | 2656 | QList<QDateTime> alarmTimes(const ICal::Component &component, const QDateTime &start, const QDateTime &end, | |
| 42 | const ICalTime::ZoneResolver &resolver) { | ||
| 43 | 2656 | QList<QDateTime> times; | |
| 44 |
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2971 | for (const auto &alarm : component.componentsNamed("VALARM")) { |
| 45 |
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315 | const QString action = alarm.value("ACTION").trimmed().toUpper(); |
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315 | if (!action.isEmpty() && action != "DISPLAY" && action != "AUDIO") continue; |
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293 | const auto *trigger = alarm.property("TRIGGER"); if (!trigger) continue; |
| 48 | 293 | QDateTime at; | |
| 49 |
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293 | if (trigger->parameter("VALUE").toUpper() == "DATE-TIME") at = ICalTime::parseProperty(*trigger,resolver).dateTime; |
| 50 | else { | ||
| 51 |
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187 | qint64 seconds = 0; if (!parseDuration(trigger->value,&seconds)) continue; |
| 52 |
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187 | const bool fromEnd = trigger->parameter("RELATED").toUpper() == "END"; |
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187 | const auto anchor = fromEnd && end.isValid() ? end : start; |
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187 | if (anchor.isValid()) at = anchor.addSecs(seconds); |
| 55 | 187 | } | |
| 56 |
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293 | if (at.isValid() && !times.contains(at)) times << at; |
| 57 | 2971 | } | |
| 58 |
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2656 | std::sort(times.begin(),times.end()); return times; |
| 59 | ✗ | } | |
| 60 | |||
| 61 | 1692 | QList<int> reminderMinutes(const ICal::Component &vevent, const QDateTime &start, const QDateTime &end, | |
| 62 | const ICalTime::ZoneResolver &resolver) { | ||
| 63 |
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1692 | QList<int> minutes; if (!start.isValid()) return minutes; |
| 64 |
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1823 | for (const auto &at : alarmTimes(vevent,start,end,resolver)) { |
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133 | const int value = int(at.secsTo(start)/60); if (!minutes.contains(value)) minutes << value; |
| 66 | 1690 | } | |
| 67 |
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1690 | std::sort(minutes.begin(),minutes.end()); return minutes; |
| 68 | ✗ | } | |
| 69 | |||
| 70 | 1 | QList<int> reminderMinutes(const QString &veventText) { | |
| 71 |
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1 | const ICal::Component vevent = ICal::parseFirst(veventText, QStringLiteral("VEVENT")); |
| 72 |
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1 | if (vevent.name.isEmpty()) return {}; |
| 73 | 1 | const ICalTime::ZoneResolver resolver; | |
| 74 |
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1 | const CalendarEvent event = eventFromComponent(vevent, resolver); |
| 75 | 1 | return event.reminders; | |
| 76 | 1 | } | |
| 77 | |||
| 78 | namespace { | ||
| 79 | // RFC 5545 duration for "minutes before the start" (-PT15M, -PT1H, -P1D, | ||
| 80 | // PT5M for after the start). | ||
| 81 | 5 | QString triggerFor(int minutesBefore) { | |
| 82 | 5 | const int magnitude = qAbs(minutesBefore); | |
| 83 |
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9 | const QString sign = minutesBefore > 0 ? QStringLiteral("-") : QString(); |
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6 | if (magnitude == 0) return QStringLiteral("PT0M"); |
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6 | if (magnitude % 1440 == 0) return sign + QStringLiteral("P%1D").arg(magnitude / 1440); |
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3 | if (magnitude % 60 == 0) return sign + QStringLiteral("PT%1H").arg(magnitude / 60); |
| 87 |
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6 | return sign + QStringLiteral("PT%1M").arg(magnitude); |
| 88 | 5 | } | |
| 89 | |||
| 90 | } // namespace | ||
| 91 | |||
| 92 | 4 | void writeReminders(ICal::Component *vevent, const QList<int> &minutes, const QString &summary) { | |
| 93 | 15 | const auto makeProperty = [](const QString &name, const QString &value) { | |
| 94 | 15 | ICal::Property property; | |
| 95 | 15 | property.name = name; | |
| 96 | 15 | property.value = value; | |
| 97 | 15 | return property; | |
| 98 | }; | ||
| 99 | 4 | QList<ICal::Component> kept; | |
| 100 |
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8 | for (const ICal::Component &component : vevent->components) { |
| 101 |
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4 | const QString action = component.value(QStringLiteral("ACTION")).trimmed().toUpper(); |
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12 | if (component.name == QLatin1String("VALARM") && |
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12 | (action.isEmpty() || action == QLatin1String("DISPLAY") || action == QLatin1String("AUDIO"))) |
| 104 | 3 | continue; | |
| 105 |
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1 | kept.append(component); |
| 106 | 4 | } | |
| 107 | 4 | vevent->components = kept; | |
| 108 |
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9 | for (const int value : minutes) { |
| 109 | 5 | ICal::Component alarm; | |
| 110 | 5 | alarm.name = QStringLiteral("VALARM"); | |
| 111 |
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10 | alarm.appendProperty(makeProperty(QStringLiteral("ACTION"), QStringLiteral("DISPLAY"))); |
| 112 |
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5 | alarm.appendProperty(makeProperty(QStringLiteral("DESCRIPTION"), |
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10 | ICal::escapeText(summary.isEmpty() ? QStringLiteral("Reminder") : summary))); |
| 114 |
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10 | alarm.appendProperty(makeProperty(QStringLiteral("TRIGGER"), triggerFor(value))); |
| 115 |
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5 | vevent->components.append(alarm); |
| 116 | 5 | } | |
| 117 | 4 | } | |
| 118 | |||
| 119 | } // namespace ICalEventCodec | ||
| 120 |