include lastfm_service.{cpp,h}
ops, I forgot to add them.
This commit is contained in:
Andrzej Rybczak
175
src/lastfm_service.cpp
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175
src/lastfm_service.cpp
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/***************************************************************************
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* Copyright (C) 2008-2010 by Andrzej Rybczak *
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* electricityispower@gmail.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#include "lastfm_service.h"
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#ifdef HAVE_CURL_CURL_H
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#include "conv.h"
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#include "curl_handle.h"
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#include "settings.h"
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const char *LastfmService::baseURL = "http://ws.audioscrobbler.com/2.0/?api_key=d94e5b6e26469a2d1ffae8ef20131b79&method=";
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const char *LastfmService::msgParseFailed = "Fetched data could not be parsed";
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LastfmService::Result LastfmService::fetch(Args &args)
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{
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Result result;
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std::string url = baseURL;
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url += methodName();
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for (Args::const_iterator it = args.begin(); it != args.end(); ++it)
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{
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url += "&";
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url += it->first;
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url += "=";
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url += Curl::escape(it->second);
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}
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std::string data;
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CURLcode code = Curl::perform(data, url);
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if (code != CURLE_OK)
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{
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result.second = curl_easy_strerror(code);
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return result;
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}
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if (actionFailed(data))
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{
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StripHtmlTags(data);
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result.second = data;
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return result;
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}
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if (!parse(data))
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{
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// if relevant part of data was not found and one of arguments
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// was language, try to fetch it again without that parameter.
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// otherwise just report failure.
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Args::iterator lang = args.find("lang");
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if (lang != args.end())
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{
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args.erase(lang);
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return fetch(args);
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}
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else
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{
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// parse should change data to error msg, if it fails
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result.second = data;
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return result;
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}
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}
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result.first = true;
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result.second = data;
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return result;
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}
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bool LastfmService::actionFailed(const std::string &data)
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{
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return data.find("status=\"failed\"") != std::string::npos;
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}
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void LastfmService::postProcess(std::string &data)
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{
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StripHtmlTags(data);
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Trim(data);
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}
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/***********************************************************************/
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bool ArtistInfo::checkArgs(const Args &args)
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{
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return args.find("artist") != args.end();
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}
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void ArtistInfo::colorizeOutput(NCurses::Scrollpad &w)
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{
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w.SetFormatting(fmtBold, U("\n\nSimilar artists:\n"), fmtBoldEnd, false);
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w.SetFormatting(Config.color2, U("\n * "), clEnd, true);
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// below is used so format won't be removed using RemoveFormatting() by accident.
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w.ForgetFormatting();
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}
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bool ArtistInfo::parse(std::string &data)
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{
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size_t a, b;
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bool parse_failed = false;
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if ((a = data.find("<content>")) != std::string::npos)
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{
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a += static_strlen("<content>");
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if ((b = data.find("</content>")) == std::string::npos)
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parse_failed = true;
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}
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else
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parse_failed = true;
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if (parse_failed)
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{
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data = msgParseFailed;
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return false;
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}
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if (a == b)
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{
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data = "No description available for this artist.";
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return false;
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}
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std::vector< std::pair<std::string, std::string> > similars;
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for (size_t i = data.find("<name>"), j, k = data.find("<url>"), l;
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i != std::string::npos; i = data.find("<name>", i), k = data.find("<url>", k))
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{
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j = data.find("</name>", i);
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i += static_strlen("<name>");
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l = data.find("</url>", k);
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k += static_strlen("<url>");
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similars.push_back(std::make_pair(data.substr(i, j-i), data.substr(k, l-k)));
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StripHtmlTags(similars.back().first);
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}
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a += static_strlen("<![CDATA[");
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b -= static_strlen("]]>");
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data = data.substr(a, b-a);
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postProcess(data);
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data += "\n\nSimilar artists:\n";
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for (size_t i = 1; i < similars.size(); ++i)
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{
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data += "\n * ";
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data += similars[i].first;
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data += " (";
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data += similars[i].second;
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data += ")";
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}
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data += "\n\n";
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data += similars.front().second;
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return true;
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}
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#endif
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73
src/lastfm_service.h
Normal file
73
src/lastfm_service.h
Normal file
@@ -0,0 +1,73 @@
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/***************************************************************************
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* Copyright (C) 2008-2010 by Andrzej Rybczak *
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* electricityispower@gmail.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#ifndef _LASTFM_SERVICE_H
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#define _LASTFM_SERVICE_H
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_CURL_CURL_H
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#include <map>
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#include <string>
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#include "scrollpad.h"
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struct LastfmService
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{
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typedef std::map<std::string, std::string> Args;
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typedef std::pair<bool, std::string> Result;
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virtual const char *name() = 0;
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virtual Result fetch(Args &args);
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virtual bool checkArgs(const Args &args) = 0;
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virtual void colorizeOutput(NCurses::Scrollpad &w) = 0;
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protected:
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virtual bool actionFailed(const std::string &data);
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virtual bool parse(std::string &data) = 0;
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virtual void postProcess(std::string &data);
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virtual const char *methodName() = 0;
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static const char *baseURL;
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static const char *msgParseFailed;
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};
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struct ArtistInfo : public LastfmService
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{
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virtual const char *name() { return "Artist info"; }
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virtual bool checkArgs(const Args &args);
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virtual void colorizeOutput(NCurses::Scrollpad &w);
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protected:
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virtual bool parse(std::string &data);
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virtual const char *methodName() { return "artist.getinfo"; }
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};
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#endif // HAVE_CURL_CURL_H
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#endif
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