// DoWork event handler for the file download BackgroundWorker.
// The selected TreeNode (either a module, folder, or file) is passed in the DoWorkEventArgs e
private void DownloadBW_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker worker = sender as BackgroundWorker;
TreeNode selectedNode = e.Argument as TreeNode;
scraper.DownloadProgress.BeginJob(worker);
// -- DETERMINE TYPE OF NODE SELECTED --
// Module selected
if (selectedNode.Tag.GetType() == typeof(BbModule))
{
BbModule module = selectedNode.Tag as BbModule;
scraper.DownloadProgress.TotalWork = module.Content.CountAllFiles();
scraper.DownloadModuleFiles(module);
}
// Single folder selected
else if (selectedNode.Tag.GetType() == typeof(BbContentDirectory))
{
BbContentDirectory folder = selectedNode.Tag as BbContentDirectory;
scraper.DownloadProgress.TotalWork = folder.CountAllFiles();
scraper.DownloadFolder(folder, scraper.OutputDirectory + BbUtils.CleanDirectory(folder.Name) + @"\");
}
// Single file selected
else if (selectedNode.Tag.GetType() == typeof(BbContentItem))
{
BbContentItem file = selectedNode.Tag as BbContentItem;
scraper.DownloadProgress.TotalWork = 1;
scraper.DownloadFile(file);
}
}
// Return true if other BbContentDirectory has the same url
public bool Equals(BbContentDirectory other)
{
if (other == null)
{
return(false);
}
return(this.url.Equals(other.Url));
}
public BbContentItem(string name, Uri url, BbContentDirectory folder, string linkType = "local")
{
this.name = name;
this.url = url;
this.linkType = linkType;
this.folder = folder;
filename = BbUtils.CleanFileName(name).Truncate(40);
}
public BbContentDirectory(string name, Uri url, BbContentDirectory parentFolder)
{
this.url = url;
this.name = name;
this.folder = parentFolder;
subFolders = new List <BbContentDirectory>();
files = new List <BbContentItem>();
}
public BbContentItem(string name, Uri url, BbContentDirectory folder, string linkType="local")
{
this.name = name;
this.url = url;
this.linkType = linkType;
this.folder = folder;
filename = BbUtils.CleanFileName(name).Truncate(40);
}
public BbContentDirectory(string name, Uri url, BbContentDirectory parentFolder)
{
this.url = url;
this.name = name;
this.folder = parentFolder;
subFolders = new List<BbContentDirectory>();
files = new List<BbContentItem>();
}
// Downloads all files in folders. Used recursively for each subfolder found.
public void DownloadFolder(BbContentDirectory folder, string directory)
{
foreach (BbContentItem file in folder.Files)
{
DownloadFile(file, directory);
}
foreach (BbContentDirectory subFolder in folder.SubFolders)
{
DownloadFolder(subFolder, directory + BbUtils.CleanDirectory(subFolder.Name) + "\\"); //Add subfolder name to directory
}
}
public static int GetViewChoice(BbContentDirectory folder)
{
bool parsed;
int choice;
parsed = Int32.TryParse(Console.ReadLine(), out choice);
while (!parsed || choice < -1 || choice > folder.SubFolders.Count + folder.Files.Count)
{
Console.WriteLine("Invalid option. Enter the number of your choice");
parsed = Int32.TryParse(Console.ReadLine(), out choice);
}
return(choice);
}
// Populates content in a learning unit, which is like a folder but with a tree-like navigation
// and content is generally displayed in iframes to the right.
public void PopulateLearningUnit(BbContentDirectory folder)
{
string pageSource = http.DownloadString(folder.Url.AbsoluteUri);
// Get the link to the next content item in a learning unit by following the next arrow link
// until there are no more left.
Uri nextURL = folder.Url;
HtmlNode nextLink;
while (nextURL != null)
{
populateProgress.AppendStatus(".");
string contentSource = http.DownloadString(nextURL);
List <HtmlNode> contentLinks = HTMLParser.GetLearningUnitContent(contentSource);
// for each content link found, add a file. Usually only one
foreach (HtmlNode link in contentLinks)
{
Uri contentURL = new Uri(folder.Url, link.Attributes["href"].Value);
string linkType = HTMLParser.GetLinkType(contentURL);
string linkName = HTMLParser.GetLinkText(link);
if (linkName == "DefaultText")
{
linkName = HTMLParser.GetPageTitle(contentSource);
}
folder.AddFile(new BbContentItem(linkName, contentURL, folder, linkType));
}
if (contentLinks.Count == 0) // if no content links found, look for content source in iFrame
{
string iFrameLink = HTMLParser.GetLearningUnitIFrame(contentSource);
if (iFrameLink != null) // if iframe found
{
Uri contentURL = new Uri(folder.Url, iFrameLink);
string linkType = HTMLParser.GetLinkType(contentURL);
string linkName = HTMLParser.GetPageTitle(contentSource);
folder.AddFile(new BbContentItem(linkName, contentURL, folder, linkType));
}
}
nextLink = HTMLParser.GetNextLearningUnitContent(contentSource);
if (nextLink == null)
{
nextURL = null;
}
else
{
nextURL = new Uri(folder.Url, nextLink.Attributes["href"].Value);
}
}
}
// Event Handler for the content treeview. Changes information displayed
private void contentTree_AfterSelect(object sender, TreeViewEventArgs e)
{
ClearInfoBox();
// Change what's displayed in the Information Box depending on type of node selected
// File selected
if (contentTree.SelectedNode.Tag.GetType() == typeof(BbContentItem))
{
BbContentItem file = contentTree.SelectedNode.Tag as BbContentItem;
infoLabel1.Text = "Name";
infoText1.Text = file.Name;
infoLabel2.Text = "Filename";
infoText2.Text = file.Filename;
infoLabel3.Text = "Link Type";
infoText3.Text = file.LinkType;
infoLabel4.Text = "URL";
infoTextLink.Text = file.Url.AbsoluteUri;
}
// Folder selected
else if (contentTree.SelectedNode.Tag.GetType() == typeof(BbContentDirectory))
{
BbContentDirectory folder = contentTree.SelectedNode.Tag as BbContentDirectory;
infoLabel1.Text = "Name";
infoText1.Text = folder.Name;
infoLabel2.Text = "Files";
infoText2.Text = folder.CountAllFiles().ToString();
infoLabel3.Text = "Subfolders";
infoText3.Text = folder.SubFolders.Count.ToString();
infoLabel4.Text = "URL";
infoTextLink.Text = folder.Url.AbsoluteUri;
}
// Module selected
else if (contentTree.SelectedNode.Tag.GetType() == typeof(BbModule))
{
BbModule module = contentTree.SelectedNode.Tag as BbModule;
infoLabel1.Text = "Name";
infoText1.Text = module.Name;
infoLabel2.Text = "Files";
infoText2.Text = module.Content.CountAllFiles().ToString();
infoLabel3.Text = "Subfolders";
infoText3.Text = module.Content.SubFolders.Count.ToString();
infoLabel4.Text = "URL";
infoTextLink.Text = module.Url.AbsoluteUri;
}
}
// Adds given folder to the content TreeView. Adds folder's node to parent node.
private void PopulateTreeFolder(TreeNode parent, BbContentDirectory folder)
{
TreeNode folderNode = new TreeNode(folder.Name);
folderNode.Tag = folder;
folderNode.ImageIndex = 2;
folderNode.SelectedImageIndex = 2;
foreach (BbContentDirectory subFolder in folder.SubFolders)
{
PopulateTreeFolder(folderNode, subFolder);
}
foreach (BbContentItem file in folder.Files)
{
AddTreeFile(folderNode, file);
}
parent.Nodes.Add(folderNode);
}
// Used recursively to populate all subfolders of a module
public void PopulateContentDirectory(BbContentDirectory folder)
{
string pageSource = http.DownloadString(folder.Url.AbsoluteUri);
List <HtmlNode> contentLinks = HTMLParser.GetContentLinks(pageSource);
if (contentLinks == null)
{
return;
}
foreach (HtmlNode link in contentLinks)
{
//Console.WriteLine("Adding " + folder.Name + ": " + link.InnerText);
populateProgress.AppendStatus(".");
Uri linkURL = new Uri(folder.Url, link.Attributes["href"].Value);
if (HTMLParser.IsSubFolder(link)) // content is a subfolder
{
BbContentDirectory subFolder = new BbContentDirectory(link.InnerText, linkURL, folder);
if (!folder.SubFolders.Contains(subFolder))
{
folder.AddSubFolder(subFolder);
}
PopulateContentDirectory(subFolder);
}
else if (HTMLParser.IsLearningUnit(link)) //content is a learning unit
{
BbContentDirectory subFolder = new BbContentDirectory(link.InnerText, linkURL, folder);
if (!folder.SubFolders.Contains(subFolder))
{
folder.AddSubFolder(subFolder);
}
PopulateLearningUnit(subFolder);
}
else // content is a file
{
string linkType = HTMLParser.GetLinkType(linkURL);
BbContentItem newFile = new BbContentItem(link.InnerText, linkURL, folder, linkType);
if (!folder.Files.Contains(newFile))
{
folder.AddFile(newFile);
}
}
}
}
public static void ViewDirectory(BbContentDirectory folder)
{
Console.WriteLine();
Console.WriteLine("VIEWING DIRECTORY: " + folder.Name);
Console.WriteLine("------------------------------------------------------------------");
for (int i = 0; i < folder.SubFolders.Count; i++)
{
Console.WriteLine(i + 1 + ". Directory: " + folder.SubFolders[i].Name);
}
for (int i = 0; i < folder.Files.Count; i++)
{
Console.WriteLine(i + 1 + folder.SubFolders.Count + ". File: " + folder.Files[i].Name);
}
Console.WriteLine("0. Back");
Console.WriteLine("-1. Quit");
Console.Write(">> ");
int choice = GetViewChoice(folder);
if (choice == -1)
{
return;
}
else if (choice == 0)
{
if (folder.ParentFolder != null)
{
ViewDirectory(folder.ParentFolder);
}
else
{
ViewContent();
}
}
else if (choice <= folder.SubFolders.Count)
{
ViewDirectory(folder.SubFolders[choice - 1]);
}
else
{
ViewFile(folder.Files[choice - folder.SubFolders.Count - 1]);
}
}
// Add a sub-folder to this directory
public void AddSubFolder(BbContentDirectory s)
{
subFolders.Add(s);
}
// Downloads all files in folders. Used recursively for each subfolder found.
public void DownloadFolder(BbContentDirectory folder, string directory)
{
foreach(BbContentItem file in folder.Files)
{
DownloadFile(file, directory);
}
foreach(BbContentDirectory subFolder in folder.SubFolders)
{
DownloadFolder(subFolder, directory + BbUtils.CleanDirectory(subFolder.Name) + "\\"); //Add subfolder name to directory
}
}
// Used recursively to populate all subfolders of a module
public void PopulateContentDirectory(BbContentDirectory folder)
{
string pageSource = http.DownloadString(folder.Url.AbsoluteUri);
List<HtmlNode> contentLinks = HTMLParser.GetContentLinks(pageSource);
if (contentLinks == null) return;
foreach (HtmlNode link in contentLinks)
{
//Console.WriteLine("Adding " + folder.Name + ": " + link.InnerText);
populateProgress.AppendStatus(".");
Uri linkURL = new Uri(folder.Url, link.Attributes["href"].Value);
if (HTMLParser.IsSubFolder(link)) // content is a subfolder
{
BbContentDirectory subFolder = new BbContentDirectory(link.InnerText, linkURL, folder);
if (!folder.SubFolders.Contains(subFolder))
{
folder.AddSubFolder(subFolder);
}
PopulateContentDirectory(subFolder);
}
else if (HTMLParser.IsLearningUnit(link)) //content is a learning unit
{
BbContentDirectory subFolder = new BbContentDirectory(link.InnerText, linkURL, folder);
if (!folder.SubFolders.Contains(subFolder))
{
folder.AddSubFolder(subFolder);
}
PopulateLearningUnit(subFolder);
}
else // content is a file
{
string linkType = HTMLParser.GetLinkType(linkURL);
BbContentItem newFile = new BbContentItem(link.InnerText, linkURL, folder, linkType);
if (!folder.Files.Contains(newFile))
{
folder.AddFile(newFile);
}
}
}
}
// Populates content in a learning unit, which is like a folder but with a tree-like navigation
// and content is generally displayed in iframes to the right.
public void PopulateLearningUnit(BbContentDirectory folder)
{
string pageSource = http.DownloadString(folder.Url.AbsoluteUri);
// Get the link to the next content item in a learning unit by following the next arrow link
// until there are no more left.
Uri nextURL = folder.Url;
HtmlNode nextLink;
while (nextURL != null)
{
populateProgress.AppendStatus(".");
string contentSource = http.DownloadString(nextURL);
List<HtmlNode> contentLinks = HTMLParser.GetLearningUnitContent(contentSource);
// for each content link found, add a file. Usually only one
foreach (HtmlNode link in contentLinks)
{
Uri contentURL = new Uri(folder.Url, link.Attributes["href"].Value);
string linkType = HTMLParser.GetLinkType(contentURL);
string linkName = HTMLParser.GetLinkText(link);
if (linkName == "DefaultText") { linkName = HTMLParser.GetPageTitle(contentSource); }
folder.AddFile(new BbContentItem(linkName, contentURL, folder, linkType));
}
if (contentLinks.Count == 0) // if no content links found, look for content source in iFrame
{
string iFrameLink = HTMLParser.GetLearningUnitIFrame(contentSource);
if (iFrameLink != null) // if iframe found
{
Uri contentURL = new Uri(folder.Url, iFrameLink);
string linkType = HTMLParser.GetLinkType(contentURL);
string linkName = HTMLParser.GetPageTitle(contentSource);
folder.AddFile(new BbContentItem(linkName, contentURL, folder, linkType));
}
}
nextLink = HTMLParser.GetNextLearningUnitContent(contentSource);
if (nextLink == null) { nextURL = null; }
else { nextURL = new Uri(folder.Url, nextLink.Attributes["href"].Value); }
}
}
public static void ViewDirectory(BbContentDirectory folder)
{
Console.WriteLine();
Console.WriteLine("VIEWING DIRECTORY: " + folder.Name);
Console.WriteLine("------------------------------------------------------------------");
for (int i = 0; i < folder.SubFolders.Count; i++)
{
Console.WriteLine(i + 1 + ". Directory: " + folder.SubFolders[i].Name);
}
for (int i = 0; i < folder.Files.Count; i++)
{
Console.WriteLine(i + 1 + folder.SubFolders.Count + ". File: " + folder.Files[i].Name);
}
Console.WriteLine("0. Back");
Console.WriteLine("-1. Quit");
Console.Write(">> ");
int choice = GetViewChoice(folder);
if (choice == -1) { return; }
else if (choice == 0)
{
if (folder.ParentFolder != null)
{
ViewDirectory(folder.ParentFolder);
}
else
{
ViewContent();
}
}
else if (choice <= folder.SubFolders.Count)
{
ViewDirectory(folder.SubFolders[choice-1]);
}
else
{
ViewFile(folder.Files[choice - folder.SubFolders.Count - 1]);
}
}
public static int GetViewChoice(BbContentDirectory folder)
{
bool parsed;
int choice;
parsed = Int32.TryParse(Console.ReadLine(), out choice);
while (!parsed || choice < -1 || choice > folder.SubFolders.Count + folder.Files.Count)
{
Console.WriteLine("Invalid option. Enter the number of your choice");
parsed = Int32.TryParse(Console.ReadLine(), out choice);
}
return choice;
}
// Return true if other BbContentDirectory has the same url
public bool Equals(BbContentDirectory other)
{
if (other == null)
{
return false;
}
return this.url.Equals(other.Url);
}
// Creates the main content directory. Url is the address of the main directory on Blackboard.
public void InitContentDirectory(Uri url)
{
content = new BbContentDirectory(name + " Content", url, null);
initialized = true;
}
// Creates the main content directory. Url is the address of the main directory on Blackboard.
public void InitContentDirectory(Uri url)
{
content = new BbContentDirectory(name + " Content", url, null);
initialized = true;
}
// Add a sub-folder to this directory
public void AddSubFolder(BbContentDirectory s)
{
subFolders.Add(s);
}