/***************************************************************************
 *   Copyright (C) 2009 Cyril Soler                                        *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#ifndef RETROSHARE_LINK_ANALYZER
#define RETROSHARE_LINK_ANALYZER

// This class implements a RS link.
//
// The link is done in a way that if valid()==true, then the link can be used.
//
// The following combinations have been tested:
//  copy   paste->   Transfers (DL) | Message compose (forums) | Private msg      | Public chat | private Chat
//    -------------+----------------+--------------------------+------------------+-------------+-------------
//          search |      Y         |            Y             | Y (send RS link) | Paste menu? | Paste menu?
//    -------------+----------------+--------------------------+------------------+-------------+-------------
//          shared |      Y         |            Y             | Y (send RS link) | Paste menu? | Paste menu?
//    -------------+----------------+--------------------------+------------------+-------------+-------------
//
#include <stdint.h>
#include <QString>
#include <QVector>
#include <QUrl>

#define RSLINK_PROCESS_NOTIFY_SUCCESS	1 // notify on success
#define RSLINK_PROCESS_NOTIFY_ERROR	2 // notify on error

#define RSLINK_PROCESS_NOTIFY_ALL      -1

#define RSLINK_SCHEME 	"retroshare"

class RetroShareLink
{
	public:
		enum enumType { TYPE_UNKNOWN, TYPE_FILE, TYPE_PERSON, TYPE_FORUM, TYPE_CHANNEL, TYPE_SEARCH, TYPE_MESSAGE };

	public:
		RetroShareLink();
		RetroShareLink(const QUrl& url);
		RetroShareLink(const QString& url);

		bool createFile(const QString& name, uint64_t size, const QString& hash);
		bool createPerson(const std::string& id);
		bool createForum(const std::string& id, const std::string& msgId);
		bool createChannel(const std::string& id, const std::string& msgId);
		bool createSearch(const QString& keywords);
		bool createMessage(const std::string& peerId, const QString& subject);

		enumType type() const {return _type; }
		uint64_t size() const { return _size ; }
		const QString& name() const { return _name ; }
		const QString& hash() const { return _hash ; }
		const QString& id() const { return _hash ; }
		const QString& msgId() const { return _msgId ; }
		const QString& subject() const { return _subject ; }
		QString title() const;

		// get nice name for anchor
		QString niceName() const;

		/// returns the string retroshare://file?name=&size=&hash=
		///                    retroshare://person?name=&hash=
		QString toString(bool encoded = true) const ;
		/// returns the string <a href="retroshare://file?name=&size=&hash=">name</a>
		///                    <a href="retroshare://person?name=&hash=">name@hash</a>
		QString toHtml() const ;
		/// returns the string <a href="retroshare://file?name=&size=&hash=">retroshare://file?name=&size=&hash=</a>
		///                    <a href="retroshare://person?name=&hash=">retroshare://person?name=&hash=</a>
		QString toHtmlFull() const ;
		
		QString toHtmlSize() const ;

		QUrl toUrl() const ;

		bool valid() const { return _valid; }

		bool operator==(const RetroShareLink& l) const { return _type == l._type && _hash == l._hash ; }

		bool process(int flag);

	private:
		void fromString(const QString &url);
		void fromUrl(const QUrl &url);
		void clear();
		void check();
		static bool checkHash(const QString& hash);
		static bool checkName(const QString& name);

		bool     _valid;
		enumType _type;
		QString  _name;
		uint64_t _size;
		QString  _hash;  // or id (forum, channel, message)
		QString  _msgId; // id of the message (forum, channel)
		QString  _subject;
};

/// This class handles the copy/paste of links. Every member is static to ensure unicity.
/// I put no mutex, because all calls supposely com from the GUI thread.
/// 
/// All links are stored in html format into the clipboard. Why? Because this allows to import
/// links from both the clipboard and the RS application, e.g. paste links from an internet forum.
/// This requires many clipboard parsing operations, but this is not a problem because this code is
/// not performances-critical.
//
class RSLinkClipboard
{
	public:
		// Copy these links to the RS clipboard. Also copy them to the system clipboard
		//
		static void copyLinks(const std::vector<RetroShareLink>& links) ;

		// Get the liste of pasted links, either from the internal RS links, or by default
		// from the clipboard.
		//
		static void pasteLinks(std::vector<RetroShareLink> &links) ;

		// Produces a list of links with no html structure.
		static QString toString() ;

		// produces a list of html links that displays with the file names only
		//
		static QString toHtml();

		// produces a list of html links that displays the full links
		//
		static QString toHtmlFull();
		
		// produces a list of html links that displays with the file name + filesize
		//
		static QString toHtmlSize();		

		// Returns true is no links are found to paste.
		// Useful for menus.
		//
		static bool empty(RetroShareLink::enumType type = RetroShareLink::TYPE_UNKNOWN);

		// Returns the count of processed links
		// Useful for menus.
		//
		static int process(RetroShareLink::enumType type = RetroShareLink::TYPE_UNKNOWN, int flag = RSLINK_PROCESS_NOTIFY_ALL);

	private:
		static void parseClipboard(std::vector<RetroShareLink> &links) ;
};

#endif