fix: harden search and release safeguards

src/search_core.h

@@ -0,0 +1,80 @@
+#pragma once
+
+#include <QByteArray>
+#include <QDir>
+#include <QMetaType>
+#include <QString>
+#include <QStringList>
+#include <QVector>
+
+#include <optional>
+#include <sys/types.h>
+
+struct SearchOptions {
+    QString roots = QDir::homePath();
+    QString fileWildcards = QStringLiteral("*");
+    QString subfolderWildcards = QStringLiteral("*");
+    QString excludeFiles;
+    QString excludeFolders;
+    QString includeFolders;
+    QString contains;
+    bool binary = false;
+    bool multipleValues = false;
+    bool multipleAnd = false;
+    bool caseSensitive = false;
+    qint64 minSize = 0;
+    qint64 maxSize = 0;
+    qint64 minTime = 0;
+    qint64 maxTime = 0;
+    QString timeField = QStringLiteral("Modified time");
+    int lastMinutes = 0;
+    bool recursive = true;
+    bool findFiles = true;
+    bool findFolders = false;
+    bool followLinks = false;
+    bool retrieveOwner = false;
+    bool accurateProgress = true;
+    bool useCache = true;
+    int maxDepth = 0;
+    int maxResults = 0;
+    QString mode = QStringLiteral("Standard search");
+    QString duplicateNameMode = QStringLiteral("All files and folders");
+    bool duplicateNameWithoutExtension = false;
+    bool showOnlyDuplicateFiles = true;
+    bool includeSubfoldersInSummary = false;
+    QString hidden = QStringLiteral("Any");
+    QString readonly = QStringLiteral("Any");
+    QString executable = QStringLiteral("Any");
+};
+
+struct FileRecord {
+    QString path;
+    QString name;
+    QString folder;
+    qint64 size = 0;
+    qint64 sizeOnDisk = 0;
+    qint64 modified = 0;
+    qint64 created = 0;
+    qint64 accessed = 0;
+    qint64 changed = 0;
+    QString type;
+    QString owner;
+    QString attributes;
+    int group = 0;
+    int duplicateCopy = 0;
+};
+
+Q_DECLARE_METATYPE(SearchOptions)
+Q_DECLARE_METATYPE(FileRecord)
+Q_DECLARE_METATYPE(QVector<FileRecord>)
+
+QStringList patterns(const QString &text);
+QStringList exclusionPatterns(const QString &text);
+bool wildcardMatch(const QString &value, const QStringList &items, Qt::CaseSensitivity cs);
+QString humanSize(qint64 bytes);
+QString ownerName(uid_t uid);
+std::optional<QByteArray> hexNeedle(QString text);
+bool fileContains(const QString &path, const SearchOptions &options);
+bool filesEqual(const QString &leftPath, const QString &rightPath);
+QByteArray sha256(const QString &path);
+bool parseOptionalIsoDate(const QString &text, qint64 &seconds);