static void WriteHistory(string key, IEnumerable <string> history)
=> Preferences.Set(key, string.Join("|", history), sharedName);
static VersionTracking()
{
IsFirstLaunchEver = !Preferences.ContainsKey(versionsKey, sharedName) || !Preferences.ContainsKey(buildsKey, sharedName);
if (IsFirstLaunchEver)
{
versionTrail = new Dictionary <string, List <string> >
{
{ versionsKey, new List <string>() },
{ buildsKey, new List <string>() }
};
}
else
{
versionTrail = new Dictionary <string, List <string> >
{
{ versionsKey, ReadHistory(versionsKey).ToList() },
{ buildsKey, ReadHistory(buildsKey).ToList() }
};
}
IsFirstLaunchForCurrentVersion = !versionTrail[versionsKey].Contains(CurrentVersion);
if (IsFirstLaunchForCurrentVersion)
{
versionTrail[versionsKey].Add(CurrentVersion);
}
IsFirstLaunchForCurrentBuild = !versionTrail[buildsKey].Contains(CurrentBuild);
if (IsFirstLaunchForCurrentBuild)
{
versionTrail[buildsKey].Add(CurrentBuild);
}
if (IsFirstLaunchForCurrentVersion || IsFirstLaunchForCurrentBuild)
{
WriteHistory(versionsKey, versionTrail[versionsKey]);
WriteHistory(buildsKey, versionTrail[buildsKey]);
}
}
static string[] ReadHistory(string key)
=> Preferences.Get(key, null, sharedName)?.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries) ?? new string[0];