private void showMenu() {
String input = "";
do {
Iterator<Artist> iter = currentArtists.iterator();
// display all current results with an associated index number
for (int j = 1; j <= currentArtists.size(); j++) {
Artist a = iter.next();
System.out.println("[" + j + "] " + a.getName());
}
System.out.println("-");
System.out.println("[L] List traveled artists");
System.out.println("[q] Quit program");
// prompt
System.out.println(separator);
System.out.println("Which artist do you want to check out?");
System.out.print("Enter his/her index number or enter 'q' to exit: ");
System.out.flush();
ArtistNode anode = null;
try {
input = in.readLine();
int neuerIndex = Integer.parseInt(input);
// if the index exceeds the array's bounds, prompt again
if (neuerIndex > currentArtists.size() || neuerIndex < 1)
System.out.println("There is no such index! Please re-try your request, would you?");
else {
// fetch the selected artist - it will become the new center
Artist a = (Artist) ((ArrayList<Artist>) currentArtists).get(neuerIndex - 1);
anode = ui.retrieveArtistInformation(a.getName());
displayArtistInformation(anode);
currentArtists = ui.findArtistsByName(a.getName());
System.out.println(separator);
}
} catch (UnknownHostException e) {
System.out.println(
"You don't seem to have established a working internet "
+ "connection going on right now. Please fix that and try again.");
System.exit(1);
} catch (IOException e) {
e.printStackTrace();
} catch (NumberFormatException e) {
if (input.equals("L")) {
listTraveledArtists();
System.out.println(separator);
} else if (input.equals("q")) break;
else
System.out.println(
"I believe you screwed up the index input (your input: "
+ input
+ ")"
+ "\n Would you mind doing it again, please?");
} catch (NoSuchEntryException e) {
System.out.println("There was an entry retrieval error! The code is " + e.getMessage());
}
} while (!input.equals("q"));
}
private void showTagsPrompt() throws IOException {
boolean fertig = false;
do {
System.out.print("Enter a genre that you want to listen to: ");
String eingaben = in.readLine();
System.out.println("Fetching artists that match your search (this may take a while)...");
// separate the entry String and build a list of tags
ArrayList<String> tags = Utils.chopTagsIntoList(eingaben);
// fire a request towards the distribution layer with the tags & save results
try {
currentArtists = ui.findArtistsByTags(tags);
if (currentArtists.size() > 0) {
// start the menu loop if you found something
fertig = true;
} else {
// if there were no matches, do it again
System.out.println("We found no matching artist for your input! Please try again. :)");
}
} catch (NullPointerException e) {
System.out.println("There was a problem during your request! Please try again.");
} catch (NoSuchEntryException e) {
System.out.println(
"There is no tag called \"" + e.getMessage().substring(2) + "\"! Please try again.");
}
} while (!fertig);
}
private void listTraveledArtists() {
ArrayList<ArtistNode> nodes = (ArrayList<ArtistNode>) ui.getTraveledArtists();
if (nodes.size() == 0) {
System.out.println("You have yet to discover artists!");
return;
}
System.out.println("Your visited artists:");
System.out.println(separator);
for (int j = 1; j <= nodes.size(); j++) {
ArtistNode a = nodes.get(j - 1);
System.out.println(j + " : " + a.getName());
}
}
private void showLoginPrompt() throws IOException {
System.out.println("Do you wish to login with your last.fm name?");
System.out.println("This is optional, but it optimizes the search algorithm");
System.out.println("by erasing every artist from any search that you already know.");
System.out.print("Enter your last.fm name or leave it blank to proceed: ");
String username = in.readLine();
if (!username.equals("")) {
System.out.println("Fetching library (this might take a while)...");
try {
int libSize = ui.loginAndGetLibraryCount(username);
if (libSize != -1)
System.out.println("Fetching library: DONE! " + libSize + " artists found.");
System.out.println(separator);
} catch (NoSuchUserException e) {
System.out.println(
"Error! There is no such user as "
+ e.getMessage()
+ "! Proceeding without library...");
}
}
}