public static void Run(Database db)
{
_db = db;
ImageRecord selected = GetRandomImageRecord();
CleanDestination();
DownloadImage(selected, Globals.SymlinkToCurrent);
_db.MarkImageDownloaded(selected);
_db.Save();
}
public void Load()
{
if (_isDbLoaded)
{
return;
}
if (_dbExistsOnFs == DbExistsOnFileSystem.False)
{
Create();
}
using (StreamReader sr = new StreamReader(_dbFullName)){
string line, table = String.Empty;
while ((line = sr.ReadLine()) != null)
{
if (IsIgnoreableLine(line))
{
continue;
}
if (IsTableHeader(line))
{
table = GetTableName(line);
}
else
{
switch (table.ToUpper())
{
case "IMAGES":
var record = new ImageRecord(line);
_images.Add(record.Key, record);
break;
default:
throw new ArgumentException(
$"Unhandled database table {table}");
}
}
}
}
_isDbLoaded = true;
}
private static void DownloadImage(ImageRecord img, bool createSymlink)
{
string filename = createSymlink ?
img["Name"] :
$"{DateTime.Now.ToString("yyMMddHHmmss")}.jpg";
if (!Directory.Exists(Globals.PictureDir))
{
Directory.CreateDirectory(Globals.PictureDir);
}
Console.WriteLine("Downlaoding image...");
using (WebClient client = new WebClient()){
client.DownloadFile(
img["Url"],
Path.Combine(Globals.PictureDir, filename));
}
if (createSymlink)
{
CreateSymlink(img);
}
}
private static void CreateSymlink(ImageRecord img)
{
Process link = new Process {
StartInfo = new ProcessStartInfo {
# if LINUX
FileName = "ln",
Arguments = String.Format("-sfn {0} {1}",
Path.Combine(
Globals.PictureDir,
img["Name"]),
Path.Combine(
Globals.PictureDir,
"current")),
# else
FileName = "echo",
Arguments =
"Symlinking not supported for this platform. " +
"Skipping.",
# endif
UseShellExecute = false,
RedirectStandardOutput = true,
CreateNoWindow = true
}
};
public void MarkImageDownloaded(ImageRecord img)
{
_images[img.Key] = img.ToggleHasBeenUsed();
}