revert to older dt recognition

src/librssguard/3rd-party/qdatetimeparser/qdatetimeparser.h

@@ -1,261 +0,0 @@
-// Copyright (C) 2021 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
-
-#ifndef QDATETIMEPARSER_P_H
-#define QDATETIMEPARSER_P_H
-
-//
-//  W A R N I N G
-//  -------------
-//
-// This file is not part of the Qt API.  It exists purely as an
-// implementation detail.  This header file may change from version to
-// version without notice, or even be removed.
-//
-// We mean it.
-//
-
-#include <QCalendar>
-#include <QDateTime>
-#include <QMetaType>
-
-#define QDATETIMEEDIT_TIME_MIN        QTime(0, 0)            // Prefer QDate::startOfDay()
-#define QDATETIMEEDIT_TIME_MAX        QTime(23, 59, 59, 999) // Prefer QDate::endOfDay()
-#define QDATETIMEEDIT_DATE_MIN        QDate(100, 1, 1)
-#define QDATETIMEEDIT_COMPAT_DATE_MIN QDate(1752, 9, 14)
-#define QDATETIMEEDIT_DATE_MAX        QDate(9999, 12, 31)
-#define QDATETIMEEDIT_DATE_INITIAL    QDate(2000, 1, 1)
-
-class QDateTimeParser {
-  public:
-    enum Context {
-      FromString,
-      DateTimeEdit
-    };
-    QDateTimeParser(QMetaType::Type t, Context ctx, const QCalendar& cal = QCalendar())
-      : parserType(t), context(ctx), calendar(cal) {
-      defaultLocale = QLocale::system();
-      first.type = FirstSection;
-      first.pos = -1;
-      first.count = -1;
-      first.zeroesAdded = 0;
-      last.type = LastSection;
-      last.pos = -1;
-      last.count = -1;
-      last.zeroesAdded = 0;
-      none.type = NoSection;
-      none.pos = -1;
-      none.count = -1;
-      none.zeroesAdded = 0;
-    }
-    virtual ~QDateTimeParser();
-
-    enum Section {
-      NoSection = 0x00000,
-      AmPmSection = 0x00001,
-      MSecSection = 0x00002,
-      SecondSection = 0x00004,
-      MinuteSection = 0x00008,
-      Hour12Section = 0x00010,
-      Hour24Section = 0x00020,
-      TimeZoneSection = 0x00040,
-      HourSectionMask = (Hour12Section | Hour24Section),
-      TimeSectionMask = (MSecSection | SecondSection | MinuteSection | HourSectionMask | AmPmSection | TimeZoneSection),
-
-      DaySection = 0x00100,
-      MonthSection = 0x00200,
-      YearSection = 0x00400,
-      YearSection2Digits = 0x00800,
-      YearSectionMask = YearSection | YearSection2Digits,
-      DayOfWeekSectionShort = 0x01000,
-      DayOfWeekSectionLong = 0x02000,
-      DayOfWeekSectionMask = DayOfWeekSectionShort | DayOfWeekSectionLong,
-      DaySectionMask = DaySection | DayOfWeekSectionMask,
-      DateSectionMask = DaySectionMask | MonthSection | YearSectionMask,
-
-      Internal = 0x10000,
-      FirstSection = 0x20000 | Internal,
-      LastSection = 0x40000 | Internal,
-      CalendarPopupSection = 0x80000 | Internal,
-
-      NoSectionIndex = -1,
-      FirstSectionIndex = -2,
-      LastSectionIndex = -3,
-      CalendarPopupIndex = -4
-    }; // extending qdatetimeedit.h's equivalent
-    Q_DECLARE_FLAGS(Sections, Section)
-
-    struct SectionNode {
-        Section type;
-        mutable int pos;
-        int count; // (used as Case(count) indicator for AmPmSection)
-        int zeroesAdded;
-
-        static QString name(Section s);
-        QString name() const {
-          return name(type);
-        }
-        QString format() const;
-        int maxChange() const;
-    };
-
-    enum State { // duplicated from QValidator
-      Invalid,
-      Intermediate,
-      Acceptable
-    };
-
-    struct StateNode {
-        StateNode() : state(Invalid), padded(0), conflicts(false) {}
-        StateNode(const QDateTime& val, State ok = Acceptable, int pad = 0, bool bad = false)
-          : value(val), state(ok), padded(pad), conflicts(bad) {}
-        QDateTime value;
-        State state;
-        int padded;
-        bool conflicts;
-    };
-
-    enum AmPm {
-      AmText,
-      PmText
-    };
-
-    StateNode parse(const QString& input, int position, const QDateTime& defaultValue, bool fixup) const;
-    bool fromString(const QString& text, QDate* date, QTime* time) const;
-    bool fromString(const QString& text, QDateTime* datetime) const;
-    bool parseFormat(QStringView format);
-
-    enum FieldInfoFlag {
-      Numeric = 0x01,
-      FixedWidth = 0x02,
-      AllowPartial = 0x04,
-      Fraction = 0x08
-    };
-    Q_DECLARE_FLAGS(FieldInfo, FieldInfoFlag)
-
-    FieldInfo fieldInfo(int index) const;
-
-    void setDefaultLocale(const QLocale& loc) {
-      defaultLocale = loc;
-    }
-    virtual QString displayText() const {
-      return m_text;
-    }
-    void setCalendar(const QCalendar& calendar);
-
-  private:
-    int sectionMaxSize(Section s, int count) const;
-    QString sectionText(const QString& text, int sectionIndex, int index) const;
-    StateNode scanString(const QDateTime& defaultValue, bool fixup) const;
-    struct ParsedSection {
-        int value;
-        int used;
-        int zeroes;
-        State state;
-        constexpr ParsedSection(State ok = Invalid, int val = 0, int read = 0, int zs = 0)
-          : value(ok == Invalid ? -1 : val), used(read), zeroes(zs), state(ok) {}
-    };
-    ParsedSection parseSection(const QDateTime& currentValue, int sectionIndex, int offset) const;
-    int findMonth(const QString& str1,
-                  int monthstart,
-                  int sectionIndex,
-                  int year,
-                  QString* monthName = nullptr,
-                  int* used = nullptr) const;
-    int findDay(const QString& str1,
-                int intDaystart,
-                int sectionIndex,
-                QString* dayName = nullptr,
-                int* used = nullptr) const;
-    ParsedSection findUtcOffset(QStringView str, int mode) const;
-    ParsedSection findTimeZoneName(QStringView str, const QDateTime& when) const;
-    ParsedSection findTimeZone(QStringView str, const QDateTime& when, int maxVal, int minVal, int mode) const;
-
-    enum AmPmFinder {
-      Neither = -1,
-      AM = 0,
-      PM = 1,
-      PossibleAM = 2,
-      PossiblePM = 3,
-      PossibleBoth = 4
-    };
-    AmPmFinder findAmPm(QString& str, int index, int* used = nullptr) const;
-
-    bool potentialValue(QStringView str, int min, int max, int index, const QDateTime& currentValue, int insert) const;
-    bool potentialValue(const QString& str, int min, int max, int index, const QDateTime& currentValue, int insert)
-      const {
-      return potentialValue(QStringView(str), min, max, index, currentValue, insert);
-    }
-
-    enum Case {
-      NativeCase,
-      LowerCase,
-      UpperCase
-    };
-
-    QString getAmPmText(AmPm ap, Case cs) const;
-
-    friend class QDTPUnitTestParser;
-
-  protected: // for the benefit of QDateTimeEditPrivate
-    int sectionSize(int index) const;
-    int sectionMaxSize(int index) const;
-    int sectionPos(int index) const;
-    int sectionPos(const SectionNode& sn) const;
-
-    const SectionNode& sectionNode(int index) const;
-    Section sectionType(int index) const;
-    QString sectionText(int sectionIndex) const;
-    int getDigit(const QDateTime& dt, int index) const;
-    bool setDigit(QDateTime& t, int index, int newval) const;
-
-    int absoluteMax(int index, const QDateTime& value = QDateTime()) const;
-    int absoluteMin(int index) const;
-
-    bool skipToNextSection(int section, const QDateTime& current, QStringView sectionText) const;
-    bool skipToNextSection(int section, const QDateTime& current, const QString& sectionText) const {
-      return skipToNextSection(section, current, QStringView(sectionText));
-    }
-    QString stateName(State s) const;
-
-    virtual QDateTime getMinimum() const;
-    virtual QDateTime getMaximum() const;
-    virtual int cursorPosition() const {
-      return -1;
-    }
-    virtual QLocale locale() const {
-      return defaultLocale;
-    }
-
-    mutable int currentSectionIndex = int(NoSectionIndex);
-    Sections display;
-    /*
-        This stores the most recently selected day.
-        It is useful when considering the following scenario:
-
-        1. Date is: 31/01/2000
-        2. User increments month: 29/02/2000
-        3. User increments month: 31/03/2000
-
-        At step 1, cachedDay stores 31. At step 2, the 31 is invalid for February, so the cachedDay is not updated.
-        At step 3, the month is changed to March, for which 31 is a valid day. Since 29 < 31, the day is set to
-       cachedDay. This is good for when users have selected their desired day and are scrolling up or down in the month
-       or year section and do not want smaller months (or non-leap years) to alter the day that they chose.
-    */
-    mutable int cachedDay = -1;
-    mutable QString m_text;
-    QList<SectionNode> sectionNodes;
-    SectionNode first, last, none, popup;
-    QStringList separators;
-    QString displayFormat;
-    QLocale defaultLocale;
-    QMetaType::Type parserType;
-    bool fixday = false;
-    Context context;
-    QCalendar calendar;
-};
-
-Q_DECLARE_OPERATORS_FOR_FLAGS(QDateTimeParser::Sections)
-Q_DECLARE_OPERATORS_FOR_FLAGS(QDateTimeParser::FieldInfo)
-
-#endif // QDATETIME_P_H

src/librssguard/CMakeLists.txt

@@ -446,11 +446,6 @@ list(APPEND SOURCES
   3rd-party/boolinq/boolinq.h
 )
 
-list(APPEND SOURCES
-  3rd-party/qdatetimeparser/qdatetimeparser.cpp
-  3rd-party/qdatetimeparser/qdatetimeparser.h
-)
-
 # Add sqlite.
 if(USE_SYSTEM_SQLITE)
   find_package(SQLite3)

src/librssguard/miscellaneous/application.cpp

@@ -10,7 +10,6 @@
 #include "3rd-party/sqlite/sqlite3.h"
 #endif
 
-#include "3rd-party/qdatetimeparser/qdatetimeparser.h"
 #include "core/feedsmodel.h"
 #include "dynamic-shortcuts/dynamicshortcuts.h"
 #include "exceptions/applicationexception.h"

src/librssguard/miscellaneous/textfactory.cpp

@@ -3,7 +3,6 @@
 #include "miscellaneous/textfactory.h"
 
 #include "3rd-party/boolinq/boolinq.h"
-#include "3rd-party/qdatetimeparser/qdatetimeparser.h"
 #include "3rd-party/sc/simplecrypt.h"
 #include "definitions/definitions.h"
 #include "exceptions/applicationexception.h"
@@ -90,23 +89,14 @@ QDateTime TextFactory::parseDateTime(const QString& date_time, QString* used_dt_
 
   QDateTime dt;
   QTime time_zone_offset;
-  // const QLocale locale(QLocale::Language::C);
+  const QLocale locale(QLocale::Language::C);
   bool positive_time_zone_offset = false;
+
   static QStringList date_patterns = dateTimePatterns();
-  QStringList timezone_offset_patterns;
+  static QStringList timezone_offset_patterns = tzOffsetPatterns();
-
-  timezone_offset_patterns << QSL("+hh:mm") << QSL("-hh:mm") << QSL("+hhmm") << QSL("-hhmm") << QSL("+hh")
-                           << QSL("-hh");
-
-  /*
-  QString tst = locale.toString(QDateTime(QDate(2024, 3, 20), QTime(16, 17, 0)), "ddd, dd MMM yy HH:mm:ss");
-  QDateTime tst2 = locale.toDateTime(tst, "ddd, dd MMM yy HH:mm:ss");
-  QString tst3 = tst2.toString("ddd, dd MMM yy HH:mm:ss");
-*/
 
   // Iterate over patterns and check if input date/time matches the pattern.
   for (const QString& pattern : std::as_const(date_patterns)) {
-    /*
     QString input_date_chopped = input_date.left(pattern.size());
 
 #if QT_VERSION >= 0x060700 // Qt >= 6.7.0
@@ -114,15 +104,6 @@ QDateTime TextFactory::parseDateTime(const QString& date_time, QString* used_dt_
 #else
     dt = locale.toDateTime(input_date_chopped, pattern);
 #endif
-*/
-    // NOTE: We use QDateTimeParser class extracted/modified from Qt sources to allow
-    // matching only prefixes of input date strings.
-    //
-    // Built-in parser only matches if the WHOLE input strings matches.
-    QDateTimeParser par(QMetaType::QDateTime, QDateTimeParser::FromString, QCalendar());
-    par.setDefaultLocale(QLocale::c());
-    par.parseFormat(pattern);
-    par.fromString(input_date, &dt);
 
     if (dt.isValid()) {
       // Make sure that this date/time is considered UTC.
@@ -191,6 +172,14 @@ QStringList TextFactory::dateTimePatterns() {
   return FROM_STD_LIST(QStringList, std_pat);
 }
 
+QStringList TextFactory::tzOffsetPatterns() {
+  QStringList pat;
+
+  pat << QSL("+hh:mm") << QSL("-hh:mm") << QSL("+hhmm") << QSL("-hhmm") << QSL("+hh") << QSL("-hh");
+
+  return pat;
+}
+
 QString TextFactory::encrypt(const QString& text, quint64 key) {
   return SimpleCrypt(key == 0 ? initializeSecretEncryptionKey() : key).encryptToString(text);
 }

src/librssguard/miscellaneous/textfactory.h

@@ -32,6 +32,7 @@ class RSSGUARD_DLLSPEC TextFactory {
     // NOTE: This method tries to always return time in UTC.
     static QDateTime parseDateTime(qint64 milis_from_epoch);
     static QStringList dateTimePatterns();
+    static QStringList tzOffsetPatterns();
     static QString encrypt(const QString& text, quint64 key = 0);
     static QString decrypt(const QString& text, quint64 key = 0);
     static QString newline();