GH-2134 Totally overengineer skin upload input validation

* It autocorrects local paths and file:// URLs to valid local paths.
* It recognizes other URL schemes as 'remote' and will show an error for them.
* The error dialogs have been fixed (they all had titles and content swapped).

1 files changed, 51 insertions, 6 deletions

diff --git a/application/dialogs/SkinUploadDialog.cpp b/application/dialogs/SkinUploadDialog.cpp
index 287aaf7e..93414c6e 100644
--- a/application/dialogs/SkinUploadDialog.cpp
+++ b/application/dialogs/SkinUploadDialog.cpp
@@ -20,14 +20,59 @@ void SkinUploadDialog::on_buttonBox_accepted()
 	if (prog.execWithTask((Task*)login.get()) != QDialog::Accepted)
 	{
 		//FIXME: recover with password prompt
-		CustomMessageBox::selectable(this, tr("Failed to login!"), tr("Unknown error"), QMessageBox::Warning)->exec();
+		CustomMessageBox::selectable(this, tr("Skin Upload"), tr("Failed to login!"), QMessageBox::Warning)->exec();
 		close();
 		return;
 	}
-	QString fileName = ui->skinPathTextBox->text();
-	if (!QFile::exists(fileName))
+	QString fileName;
+	QString input = ui->skinPathTextBox->text();
+	QRegExp urlPrefixMatcher("^([a-z]+)://.+$");
+	bool isLocalFile = false;
+	// it has an URL prefix -> it is an URL
+	if(urlPrefixMatcher.exactMatch(input))
 	{
-		CustomMessageBox::selectable(this, tr("Skin file does not exist!"), tr("Unknown error"), QMessageBox::Warning)->exec();
+		QUrl fileURL = input;
+		if(fileURL.isValid())
+		{
+			// local?
+			if(fileURL.isLocalFile())
+			{
+				isLocalFile = true;
+				fileName = fileURL.toLocalFile();
+			}
+			else
+			{
+				CustomMessageBox::selectable(
+					this,
+					tr("Skin Upload"),
+					tr("Using remote URLs for setting skins is not implemented yet."),
+					QMessageBox::Warning
+				)->exec();
+				close();
+				return;
+			}
+		}
+		else
+		{
+			CustomMessageBox::selectable(
+				this,
+				tr("Skin Upload"),
+				tr("You cannot use an invalid URL for uploading skins."),
+				QMessageBox::Warning
+			)->exec();
+			close();
+			return;
+		}
+	}
+	else
+	{
+		// just assume it's a path then
+		isLocalFile = true;
+		fileName = ui->skinPathTextBox->text();
+	}
+	if (isLocalFile && !QFile::exists(fileName))
+	{
+		CustomMessageBox::selectable(this, tr("Skin Upload"), tr("Skin file does not exist!"), QMessageBox::Warning)->exec();
 		close();
 		return;
 	}
@@ -43,11 +88,11 @@ void SkinUploadDialog::on_buttonBox_accepted()
 	SkinUploadPtr upload = std::make_shared<SkinUpload>(this, session, FS::read(fileName), model);
 	if (prog.execWithTask((Task*)upload.get()) != QDialog::Accepted)
 	{
-		CustomMessageBox::selectable(this, tr("Failed to upload skin!"), tr("Unknown error"), QMessageBox::Warning)->exec();
+		CustomMessageBox::selectable(this, tr("Skin Upload"), tr("Failed to upload skin!"), QMessageBox::Warning)->exec();
 		close();
 		return;
 	}
-	CustomMessageBox::selectable(this, tr("Skin uploaded!"), tr("Success"), QMessageBox::Information)->exec();
+	CustomMessageBox::selectable(this, tr("Skin Upload"), tr("Success"), QMessageBox::Information)->exec();
 	close();
 }