//overloaded Print() function to print LINQ matches
public void Print(KeyValuePair <string, Song> match)
{
SongDuration newDuration = SongDuration.ConvertDuration(match.Value.Duration);
Console.WriteLine("title: {0}, artist: {1}, songwriter: {2}, year: {3}, duration: {4}",
match.Value.Title, match.Value.Singer, match.Value.SongWriter, match.Value.Year, newDuration.ToString());
}
//Displays song data on console for all current dictionary entries.
public void Print(Dictionary <string, Song> songs)
{
foreach (KeyValuePair <string, Song> song in songs)
{
SongDuration newDuration = SongDuration.ConvertDuration(song.Value.Duration);
Console.WriteLine("title: {0}, artist: {1}, songwriter: {2}, year: {3}, duration: {4}",
song.Value.Title, song.Value.Singer, song.Value.SongWriter, song.Value.Year, newDuration.ToString());
}
}
static void Main(string[] args)
{
Dictionary <string, Song> songs = new Dictionary <string, Song>();
DictionaryHandler handler = new DictionaryHandler();
//Sets up TextInfo to allow conversion ToTitleCase
TextInfo textinfo = new CultureInfo("en-US", false).TextInfo;
Console.SetWindowSize(150, 32);
CreateSongs();
handler.Print(songs);
PromptMenu();
Console.WriteLine();
Console.ReadLine();
//Initializes the original song data for the dictionary of Song objects.
void CreateSongs()
{
Song song1 = new Song("Narcolepsy", "Ben Folds Five", "Ben Folds", 1999, 324); // 5:24
songs.Add(song1.Title, song1);
Song song2 = new Song("Catalyst", "Kyla la Grange", "Kyla La Grange", 2012, 246); // 4:06
songs.Add(song2.Title, song2);
Song song3 = new Song("Take Me To Church", "Hozier", "Andrew Hozier-Byrne", 2014, 242); // 4:02
songs.Add(song3.Title, song3);
Song song4 = new Song("Family", "Dry The River", "Peter Liddle", 2011, 280); // 4:40
songs.Add(song4.Title, song4);
Song song5 = new Song("Obedear", "Purity Ring", "Megan James", 2012, 210); // 3:30
songs.Add(song5.Title, song5);
Song song6 = new Song("We're All Thieves", "Circa Survive", "Anthony Green", 2005, 294); // 4:54
songs.Add(song6.Title, song6);
Song song7 = new Song("Blue Lips", "Regina Spektor", "Regina Spektor", 2009, 212); // 3:32
songs.Add(song7.Title, song7);
Song song8 = new Song("Jungle", "Tash Sultana", "Tash Sultana", 2017, 316); // 5:16
songs.Add(song8.Title, song8);
Song song9 = new Song("Young", "Vallis Alps", "Parissa Tosif", 2015, 324); // 5:24
songs.Add(song9.Title, song9);
Song song10 = new Song("One More Cup Of Coffee", "Frazey Ford", "Bob Dylan", 2010, 259); // 4:19
songs.Add(song10.Title, song10);
}
//Handle user key input for menu selection.
int MenuHandler(ConsoleKey keypress)
{
switch (keypress)
{
case ConsoleKey.D1:
return(1);
case ConsoleKey.D2:
return(2);
case ConsoleKey.D3:
return(3);
case ConsoleKey.D4:
return(4);
case ConsoleKey.D5:
return(5);
case ConsoleKey.D6:
return(6);
case ConsoleKey.D7:
return(7);
case ConsoleKey.D8:
return(8);
case ConsoleKey.D9:
return(9);
case ConsoleKey.D0:
return(0);
default:
Console.WriteLine("Invalid entry, try again.");
return(11);
}
}
//Display menu options on console, run methods per user input. Return to menu afterwards.
void PromptMenu()
{
Console.WriteLine();
Console.WriteLine("Select an action by pressing a corresponding key." + Environment.NewLine +
"1. Display all saved song data on screen." + Environment.NewLine +
"2. Delete saved song data by title." + Environment.NewLine +
"3. Search specific saved song data by title." + Environment.NewLine +
"4. Display all saved song data on screen, by title (ascending)." + Environment.NewLine +
"5. Display all saved song data on screen, by year (ascending)." + Environment.NewLine +
"6. Display a range of song data on screen, by duration (ascending)." + Environment.NewLine +
"7. Display all saved song data on screen, by year (descending)." + Environment.NewLine +
"8. Run song duration comparison demos (one equal, one unequal comparison)." + Environment.NewLine +
"9. Run song duration addition demo." + Environment.NewLine +
"0. Run song duration subtraction demo.");
Console.WriteLine();
switch (MenuHandler(Console.ReadKey(true).Key))
{
case (1):
handler.Print(songs);
PromptMenu();
break;
case (2):
Console.WriteLine("Type a song title below and hit enter to delete.");
handler.DeleteByTitle(songs, Console.ReadLine());
PromptMenu();
break;
case (3):
Console.WriteLine("Type a song title below and hit enter to search.");
handler.GetSongByTitle(songs, Console.ReadLine());
PromptMenu();
break;
case (4):
handler.PrintByTitle(songs);
PromptMenu();
break;
case (5):
handler.PrintByYear(songs);
PromptMenu();
break;
case (6):
Console.WriteLine("Type a minimum song duration in minutes below and hit enter.");
int min = (Convert.ToInt32(Console.ReadLine()) * 60);
Console.WriteLine("Now, type a maximum song duration in minutes below and hit enter.");
int max = (Convert.ToInt32(Console.ReadLine()) * 60);
handler.PrintByDuration(songs, min, max);
PromptMenu();
break;
case (7):
handler.PrintByYearDesc(songs);
PromptMenu();
break;
case (8):
DurationComparison(songs["Narcolepsy"], songs["Young"]);
DurationComparison(songs["Blue Lips"], songs["Family"]);
PromptMenu();
break;
case (9):
CombineDurations(songs["Narcolepsy"], songs["Young"]);
PromptMenu();
break;
case (0):
SubtractDurations(songs["Blue Lips"], songs["Family"]);
PromptMenu();
break;
case (11):
PromptMenu();
break;
}
Console.WriteLine();
Console.ReadLine();
}
//Compares two song durations using '==', '!=', '<', '>', '>=' and '<='.
//Prints statements that are 'true' to demonstrate results.
void DurationComparison(Song s1, Song s2)
{
SongDuration s1Duration = SongDuration.ConvertDuration(s1.Duration);
SongDuration s2Duration = SongDuration.ConvertDuration(s2.Duration);
Console.WriteLine("True statements:");
Console.WriteLine();
try
{
if (s1Duration == s2Duration)
{
Console.WriteLine("Songs are the same length!");
}
else if (s1Duration != s2Duration)
{
Console.WriteLine("Songs are NOT the same length!");
if (s1Duration < s2Duration)
{
Console.WriteLine("Song 1 is shorter than song 2.");
}
if (s1Duration <= s2Duration)
{
Console.WriteLine("Song 1 is shorter than or equal to song 2.");
}
if (s1Duration > s2Duration)
{
Console.WriteLine("Song 1 is longer than song 2.");
}
if (s1Duration >= s2Duration)
{
Console.WriteLine("Song 1 is longer than or equal to song 2.");
}
}
else
{
throw new Exception("Could not compare those two song durations, check input and try again.");
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
//Adds two song duration. Prints the combined duration.
void CombineDurations(Song s1, Song s2)
{
SongDuration newDuration = SongDuration.ConvertDuration(s1.Duration + s2.Duration);
Console.WriteLine("Combined play time for songs '{0}' and '{1}' is: {2}"
, s1.Title, s2.Title, newDuration.ToString());
}
//Subtracts two song durations. Prints the duration difference (positive or negative)
void SubtractDurations(Song s1, Song s2)
{
SongDuration newDuration = SongDuration.ConvertDuration(s1.Duration - s2.Duration);
//tests for negative values
if (newDuration.negative == false)
{
Console.WriteLine("'{0}' is longer than '{1}' by: {2}"
, s1.Title, s2.Title, newDuration.ToString());
}
else if (newDuration.negative == true)
{
Console.WriteLine("'{0}' is shorter than '{1}' by: {2}"
, s1.Title, s2.Title, newDuration.ToString());
}
else
{
Console.WriteLine("Songs are the same length!");
}
}
}