support for fetching artist's info from last.fm

doc/ncmpcpp_keys

@@ -95,6 +95,8 @@
 #
 #key_song_info = 'i'
 #
+#key_artist_info = 'I'
+#
 #key_lyrics = 'l'
 #
 #key_reverse_selection = 'v'

src/help.cpp

@@ -136,7 +136,10 @@ string GetKeybindings()
 	result += DisplayKeys(Key.EditTags) + "Edit song's tags/playlist's name\n";
 #	endif // HAVE_TAGLIB_H
 	result += DisplayKeys(Key.GoToPosition) + "Go to chosen position in current song\n";
-	result += DisplayKeys(Key.ShowInfo) + "Show song's info\n";
+	result += DisplayKeys(Key.SongInfo) + "Show song's info\n";
+#	ifdef HAVE_CURL_CURL_H
+	result += DisplayKeys(Key.ArtistInfo) + "Show artist's info\n";
+#	endif // HAVE_CURL_CURL_H
 	result += DisplayKeys(Key.Lyrics) + "Show/hide song's lyrics\n\n";
 	
 	result += DisplayKeys(Key.Quit) + "Quit\n\n\n";

src/lyrics.cpp

@@ -20,6 +20,9 @@
 
 #include <sys/stat.h>
 #include "lyrics.h"
+#include "settings.h"
+
+extern ncmpcpp_config Config;
 
 const string lyrics_folder = home_folder + "/" + ".lyrics";
 
@@ -49,6 +52,136 @@ void EscapeHtml(string &str)
 		str.replace(i, 6, "&");
 }
 
+#ifdef HAVE_CURL_CURL_H
+string GetArtistInfo(string artist)
+{
+	const string filename = artist + ".txt";
+	const string fullpath = lyrics_folder + "/" + filename;
+	mkdir(lyrics_folder.c_str(), 0755);
+	
+	string result;
+	std::ifstream input(fullpath.c_str());
+	
+	if (input.is_open())
+	{
+		string line;
+		while (getline(input, line))
+			result += line + "\n";
+		return result.substr(0, result.length()-1);
+	}
+	
+	for (string::iterator it = artist.begin(); it != artist.end(); it++)
+		if (*it == ' ')
+			*it = '+';
+	
+	CURLcode code;
+	
+	string url = "http://ws.audioscrobbler.com/2.0/?method=artist.getinfo&artist=" + artist + "&api_key=d94e5b6e26469a2d1ffae8ef20131b79";
+	
+	CURL *info = curl_easy_init();
+	curl_easy_setopt(info, CURLOPT_URL, url.c_str());
+	curl_easy_setopt(info, CURLOPT_WRITEFUNCTION, write_data);
+	curl_easy_setopt(info, CURLOPT_WRITEDATA, &result);
+	curl_easy_setopt(info, CURLOPT_CONNECTTIMEOUT, 10);
+	code = curl_easy_perform(info);
+	curl_easy_cleanup(info);
+	
+	if (code != CURLE_OK)
+	{
+		result = "Error while fetching artist's info: " + string(curl_easy_strerror(code));
+		return result;
+	}
+	
+	int a, b;
+	bool erase = 0;
+	bool save = 1;
+	
+	a = result.find("status=\"failed\"");
+	
+	if (a != string::npos)
+	{
+		EscapeHtml(result);
+		return "Last.fm returned an error message: " + result;
+	}
+	
+	vector<string> similar;
+	for (int i = result.find("<name>"); i != string::npos; i = result.find("<name>"))
+	{
+		result[i] = '.';
+		int j = result.find("</name>");
+		result[j] = '.';
+		i += 6;
+		similar.push_back(result.substr(i, j-i));
+	}
+	vector<string> urls;
+	for (int i = result.find("<url>"); i != string::npos; i = result.find("<url>"))
+	{
+		result[i] = '.';
+		int j = result.find("</url>");
+		result[j] = '.';
+		i += 5;
+		urls.push_back(result.substr(i, j-i));
+	}
+	
+	a = result.find("<content>")+9;
+	b = result.find("</content>");
+	
+	if (a == b)
+	{
+		result = "No description available for this artist.";
+		save = 0;
+	}
+	else
+	{
+		a += 9; // for <![CDATA[
+		b -= 3; // for ]]>
+		result = result.substr(a, b-a);
+	}
+	
+	EscapeHtml(result);
+	for (int i = 0; i < result.length(); i++)
+	{
+		if (erase)
+		{
+			result.erase(result.begin()+i);
+			erase = 0;
+		}
+		if (result[i] == 13)
+		{
+			result[i] = '\n';
+			erase = 1;
+		}
+		else if (result[i] == '\t')
+			result[i] = ' ';
+	}
+	
+	int i = result.length();
+	if (result[i-1] == '\n')
+	{
+		while (result[--i] == '\n');
+		result = result.substr(0, i+1);
+	}
+	
+	result += "\n\n[.b]Similar artists:[/b]\n";
+	for (int i = 1; i < similar.size(); i++)
+		result += "\n [." + Config.color2 + "]*[/" + Config.color2 + "] " + similar[i] + " (" + urls[i] + ")";
+	
+	result += "\n\n" + urls.front();
+	
+	if (save)
+	{
+		std::ofstream output(fullpath.c_str());
+		if (output.is_open())
+		{
+			output << result;
+			output.close();
+		}
+	}
+	
+	return result;
+}
+#endif // HAVE_CURL_CURL_H
+
 string GetLyrics(string artist, string song)
 {
 	const string filename = artist + " - " + song + ".txt";
@@ -63,7 +196,7 @@ string GetLyrics(string artist, string song)
 		string line;
 		while (getline(input, line))
 			result += line + "\n";
-		return result;
+		return result.substr(0, result.length()-1);
 	}
 	
 #	ifdef HAVE_CURL_CURL_H
@@ -110,7 +243,6 @@ string GetLyrics(string artist, string song)
 	EscapeHtml(result);
 	
 	std::ofstream output(fullpath.c_str());
-	
 	if (output.is_open())
 	{
 		output << result;
@@ -119,6 +251,6 @@ string GetLyrics(string artist, string song)
 #	else
 	result = "Local lyrics not found. As ncmpcpp has been compiled without curl support, you can put appropriate lyrics into ~/.lyrics directory (file syntax is \"ARTIST - TITLE.txt\") or recompile ncmpcpp with curl support.";
 #	endif
-	return result + '\n';
+	return result;
 }
 

src/lyrics.h

@@ -26,6 +26,7 @@
 #include <fstream>
 #ifdef HAVE_CURL_CURL_H
 # include "curl/curl.h"
+string GetArtistInfo(string);
 #endif
 
 void EscapeHtml(string &);

src/ncmpcpp.cpp

@@ -304,6 +304,7 @@ int main(int argc, char *argv[])
 	bool title_allowed = 0;
 	
 	string lyrics_title;
+	string info_title;
 	// local variables end
 	
 	while (!main_exit)
@@ -348,7 +349,7 @@ int main(int argc, char *argv[])
 					title = "Tag editor";
 					break;
 				case csInfo:
-					title = "Song info";
+					title = info_title;
 					break;
 				case csSearcher:
 					title = "Search engine";
@@ -2717,7 +2718,7 @@ int main(int argc, char *argv[])
 			Config.space_selects = !Config.space_selects;
 			ShowMessage("Space mode: " + string(Config.space_selects ? "Select/deselect" : "Add") + " item");
 		}
-		else if (Keypressed(input, Key.ShowInfo))
+		else if (Keypressed(input, Key.SongInfo))
 		{
 			if (wCurrent == sInfo)
 			{
@@ -2779,11 +2780,88 @@ int main(int argc, char *argv[])
 				prev_screen = current_screen;
 				current_screen = csInfo;
 				redraw_header = 1;
+				info_title = "Song info";
 				sInfo->Clear();
 				sInfo->Add(GetInfo(*s));
 				sInfo->Hide();
 			}
 		}
+#		ifdef HAVE_CURL_CURL_H
+		else if (Keypressed(input, Key.ArtistInfo))
+		{
+			if (wCurrent == sInfo)
+			{
+				wCurrent->Hide();
+				current_screen = prev_screen;
+				wCurrent = wPrev;
+				redraw_screen = 1;
+				redraw_header = 1;
+				if (current_screen == csLibrary)
+				{
+					REFRESH_MEDIA_LIBRARY_SCREEN;
+				}
+				else if (current_screen == csPlaylistEditor)
+				{
+					REFRESH_PLAYLIST_EDITOR_SCREEN;
+				}
+#				ifdef HAVE_TAGLIB_H
+				else if (current_screen == csTagEditor)
+				{
+					REFRESH_TAG_EDITOR_SCREEN;
+				}
+#				endif // HAVE_TAGLIB_H
+			}
+			else if (
+			    (wCurrent == mPlaylist && !mPlaylist->Empty())
+			||  (wCurrent == mBrowser && mBrowser->Current().type == itSong)
+			||  (wCurrent == mSearcher && mSearcher->Current().first == ".")
+			||  (wCurrent == mLibArtists && !mLibArtists->Empty())
+			||  (wCurrent == mLibSongs && !mLibSongs->Empty())
+			||  (wCurrent == mPlaylistEditor && !mPlaylistEditor->Empty())
+			||  (wCurrent == mEditorTags && !mEditorTags->Empty()))
+			{
+				string artist;
+				int id = wCurrent->GetChoice();
+				switch (current_screen)
+				{
+					case csPlaylist:
+						artist = mPlaylist->at(id).GetArtist();
+						break;
+					case csBrowser:
+						artist = mBrowser->at(id).song->GetArtist();
+						break;
+					case csSearcher:
+						artist = mSearcher->at(id).second.GetArtist();
+						break;
+					case csLibrary:
+						artist = mLibArtists->at(id);
+						break;
+					case csPlaylistEditor:
+						artist = mPlaylistEditor->at(id).GetArtist();
+						break;
+					case csTagEditor:
+						artist = mEditorTags->at(id).GetArtist();
+						break;
+					default:
+						break;
+				}
+				if (artist != UNKNOWN_ARTIST)
+				{
+					wPrev = wCurrent;
+					wCurrent = sInfo;
+					prev_screen = current_screen;
+					current_screen = csInfo;
+					redraw_header = 1;
+					info_title = "Artist's info - " + artist;
+					sInfo->Clear();
+					sInfo->WriteXY(0, 0, "Fetching artist's info...");
+					sInfo->Refresh();
+					sInfo->Add(GetArtistInfo(artist));
+					sInfo->Hide();
+				}
+			}
+		}
+#		endif // HAVE_CURL_CURL_H
 		else if (Keypressed(input, Key.Lyrics))
 		{
 			if (wCurrent == sLyrics)

src/settings.cpp

@@ -66,7 +66,8 @@ void DefaultKeys(ncmpcpp_keys &keys)
 	keys.PrevFoundPosition[0] = ',';
 	keys.ToggleFindMode[0] = 'w';
 	keys.EditTags[0] = 'e';
-	keys.ShowInfo[0] = 'i';
+	keys.SongInfo[0] = 'i';
+	keys.ArtistInfo[0] = 'I';
 	keys.GoToPosition[0] = 'g';
 	keys.Lyrics[0] = 'l';
 	keys.ReverseSelection[0] = 'v';
@@ -125,7 +126,8 @@ void DefaultKeys(ncmpcpp_keys &keys)
 	keys.PrevFoundPosition[1] = null_key;
 	keys.ToggleFindMode[1] = null_key;
 	keys.EditTags[1] = null_key;
-	keys.ShowInfo[1] = null_key;
+	keys.SongInfo[1] = null_key;
+	keys.ArtistInfo[1] = null_key;
 	keys.GoToPosition[1] = null_key;
 	keys.Lyrics[1] = null_key;
 	keys.ReverseSelection[1] = null_key;
@@ -381,7 +383,9 @@ void ReadKeys(ncmpcpp_keys &keys)
 			else if (it->find("key_go_to_position ") != string::npos)
 				GetKeys(*it, keys.GoToPosition);
 			else if (it->find("key_song_info ") != string::npos)
-				GetKeys(*it, keys.ShowInfo);
+				GetKeys(*it, keys.SongInfo);
+			else if (it->find("key_artist_info ") != string::npos)
+				GetKeys(*it, keys.ArtistInfo);
 			else if (it->find("key_lyrics ") != string::npos)
 				GetKeys(*it, keys.Lyrics);
 			else if (it->find("key_reverse_selection ") != string::npos)

src/settings.h

@@ -68,7 +68,8 @@ struct ncmpcpp_keys
 	int PrevFoundPosition[2];
 	int ToggleFindMode[2];
 	int EditTags[2];
-	int ShowInfo[2];
+	int SongInfo[2];
+	int ArtistInfo[2];
 	int GoToPosition[2];
 	int Lyrics[2];
 	int ReverseSelection[2];