Ref T199, added some utility functions

* tag object can be read from data directory
* isNull
* some renamings

src/blackmisc/applicationinfolist.cpp

@@ -33,7 +33,7 @@ namespace BlackMisc
         names.reserve(size());
         for (const CApplicationInfo &info : *this)
         {
-            names.append(info.processInfo().processName());
+            names.append(info.getProcessInfo().processName());
         }
         return names;
     }

src/blackmisc/directoryutils.cpp

@@ -95,23 +95,54 @@ namespace BlackMisc
         return p;
     }
 
-    QFileInfoList CDirectoryUtils::applicationDataDirectories()
+    const QFileInfoList &CDirectoryUtils::applicationDataDirectories()
     {
-        QDir swiftAppData(CDirectoryUtils::applicationDataDirectory()); // contains 1..n subdirs
-        if (!swiftAppData.isReadable()) return QFileInfoList();
-        return swiftAppData.entryInfoList({}, QDir::Dirs | QDir::NoDotAndDotDot, QDir::Time);
+        static const QFileInfoList fileInfoList([]
+        {
+            const QDir swiftAppData(CDirectoryUtils::applicationDataDirectory()); // contains 1..n subdirs
+            if (!swiftAppData.isReadable()) return QFileInfoList();
+            return swiftAppData.entryInfoList({}, QDir::Dirs | QDir::NoDotAndDotDot, QDir::Time);
+        }());
+        return fileInfoList;
     }
 
-    QStringList CDirectoryUtils::applicationDataDirectoryList(bool withoutCurrent, bool beautify)
+    int CDirectoryUtils::applicationDataDirectoriesCount()
+    {
+        return CDirectoryUtils::applicationDataDirectories().size();
+    }
+
+    QStringList CDirectoryUtils::applicationDataDirectoryList(bool withoutCurrent, bool decodedDirName)
     {
         QStringList dirs;
-        const QFileInfoList directories(CDirectoryUtils::applicationDataDirectories());
-        for (const QFileInfo &info : directories)
+        for (const QFileInfo &info : CDirectoryUtils::applicationDataDirectories())
         {
             if (withoutCurrent && info.filePath().contains(normalizedApplicationDirectory(), Qt::CaseInsensitive)) continue;
-            dirs.append(beautify ?
-                        CDirectoryUtils::decodeNormalizedDirectory(info.fileName()) :
-                        info.fileName());
+            dirs.append(decodedDirName ?
+                        CDirectoryUtils::decodeNormalizedDirectory(info.filePath()) :
+                        info.filePath());
+        }
+        return dirs;
+    }
+
+    QMap<QString, CApplicationInfo> CDirectoryUtils::applicationDataDirectoryMap(bool withoutCurrent)
+    {
+        static const CApplicationInfo nullInfo;
+        QMap<QString, CApplicationInfo> dirs;
+
+        for (const QFileInfo &info : CDirectoryUtils::applicationDataDirectories())
+        {
+            if (withoutCurrent && info.filePath().contains(normalizedApplicationDirectory(), Qt::CaseInsensitive)) continue;
+            const QString appInfoFile = CFileUtils::appendFilePaths(info.filePath(), CApplicationInfo::fileName());
+            const QString appInfoJson = CFileUtils::readFileToString(appInfoFile);
+            if (appInfoJson.isEmpty())
+            {
+                dirs.insert(info.filePath(), nullInfo);
+            }
+            else
+            {
+                const CApplicationInfo appInfo = CApplicationInfo::fromJson(appInfoJson);
+                dirs.insert(info.filePath(), appInfo);
+            }
         }
         return dirs;
     }

src/blackmisc/directoryutils.h

@@ -12,7 +12,9 @@
 #ifndef BLACKMISC_DIRECTORYUTILS_H
 #define BLACKMISC_DIRECTORYUTILS_H
 
-#include "blackmisc/blackmiscexport.h"
+#include "applicationinfo.h"
+#include "blackmiscexport.h"
+#include <QMap>
 #include <QSet>
 #include <QString>
 #include <QFileInfoList>
@@ -41,10 +43,16 @@ namespace BlackMisc
         static const QString &applicationDataDirectory();
 
         //! swift application data sub directories
-        static QFileInfoList applicationDataDirectories();
+        static const QFileInfoList &applicationDataDirectories();
+
+        //! number of data directories (including this version)
+        static int applicationDataDirectoriesCount();
 
         //! swift application data sub directories
-        static QStringList applicationDataDirectoryList(bool withoutCurrent = false, bool beautify = false);
+        static QStringList applicationDataDirectoryList(bool withoutCurrent = false, bool decodedDirName = false);
+
+        //! swift application data sub directories with info if available
+        static QMap<QString, CApplicationInfo> applicationDataDirectoryMap(bool withoutCurrent = false);
 
         //! Is MacOS application bundle?
         //! \remark: Means the currently running executable is a MacOS bundle, but not all our executables are bundles on MacOS

src/blackmisc/processinfo.h

@@ -42,6 +42,9 @@ namespace BlackMisc
         //! Get the pid.
         qint64 processId() const { return m_pid; }
 
+        //! Empty process info
+        bool isNull() const { return m_pid == 0 && m_name.isEmpty(); }
+
         //! Get the process name.
         const QString &processName() const { return m_name; }