1 /***************************************************************************
2 * Copyright (C) 2005-07 by The Quassel Team *
3 * devel@quassel-irc.org *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
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17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
25 #include <QSqlDatabase>
29 class Storage : public QObject {
34 virtual ~Storage() {};
36 //! Initialize the static parts of the storage class
37 /** This is called by the core before any other method of the storage backend is used.
38 * This should be used to perform any static initialization that might be necessary.
39 * DO NOT use this for creating database connection or similar stuff, since init() might be
40 * called even if the storage backend is never be actually used (because no user selected it).
41 * For anything like this, the constructor (which is called if and when we actually create an instance
42 * of the storage backend) is the right place.
44 static void init() {};
48 //! Check if the storage type is available.
49 /** A storage subclass should return true if it can be successfully used, i.e. if all
50 * prerequisites are in place (e.g. we have an appropriate DB driver etc.).
51 * \return True if and only if the storage class can be successfully used.
53 static bool isAvailable() { return false; }
55 //! Returns the display name of the storage backend
56 /** \return A string that can be used by the GUI to describe the storage backend */
57 static QString displayName() { return ""; }
59 // TODO: Add functions for configuring the backlog handling, i.e. defining auto-cleanup settings etc
63 //! Add a new core user to the storage.
64 /** \param user The username of the new user
65 * \param password The cleartext password for the new user
66 * \return The new user's UserId
68 virtual UserId addUser(const QString &user, const QString &password) = 0;
70 //! Update a core user's password.
71 /** \param user The user's id
72 * \param password The user's new password
74 virtual void updateUser(UserId user, const QString &password) = 0;
77 /** \param user The user's id
78 * \param newName The user's new name
80 virtual void renameUser(UserId user, const QString &newName) = 0;
82 //! Validate a username with a given password.
83 /** \param user The username to validate
84 * \param password The user's alleged password
85 * \return A valid UserId if the password matches the username; 0 else
87 virtual UserId validateUser(const QString &user, const QString &password) = 0;
89 //! Remove a core user from storage.
90 /** \param user The userid to delete
92 virtual void delUser(UserId user) = 0;
94 /* Network handling */
96 //! Get the unique NetworkId of the network for a user.
97 /** \param user The core user who owns this buffername
98 * \param network The network name
99 * \return The BufferInfo corresponding to the given network and buffer name, or 0 if not found
101 virtual uint getNetworkId(UserId user, const QString &network) = 0;
103 /* Buffer handling */
105 //! Get the unique BufferInfo for the given combination of network and buffername for a user.
106 /** \param user The core user who owns this buffername
107 * \param network The network name
108 * \param buffer The buffer name (if empty, the net's status buffer is returned)
109 * \return The BufferInfo corresponding to the given network and buffer name, or 0 if not found
111 virtual BufferInfo getBufferInfo(UserId user, const QString &network, const QString &buffer = "") = 0;
113 //! Request a list of all buffers known to a user since a certain point in time.
114 /** This method is used to get a list of all buffers we have stored a backlog from.
115 * Optionally, a QDateTime can be given, so that only buffers are listed that where active
116 * since that point in time.
117 * \param user The user whose buffers we request
118 * \param since If this is defined, older buffers will be ignored
119 * \return A list of the BufferInfos for all buffers as requested
121 virtual QList<BufferInfo> requestBuffers(UserId user, QDateTime since = QDateTime()) = 0;
123 /* Message handling */
125 //! Store a Message in the backlog.
126 /** \param msg The message object to be stored
127 * \return The globally unique id for the stored message
129 virtual MsgId logMessage(Message msg) = 0;
131 //! Request a certain number (or all) messages stored in a given buffer.
132 /** \param buffer The buffer we request messages from
133 * \param lastmsgs The number of messages we would like to receive, or -1 if we'd like all messages from that buffername
134 * \param offset Do not return (but DO count) messages with MsgId >= offset, if offset >= 0
135 * \return The requested list of messages
137 virtual QList<Message> requestMsgs(BufferInfo buffer, int lastmsgs = -1, int offset = -1) = 0;
139 //! Request messages stored in a given buffer since a certain point in time.
140 /** \param buffer The buffer we request messages from
141 * \param since Only return messages newer than this point in time
142 * \param offset Do not return messages with MsgId >= offset, if offset >= 0
143 * \return The requested list of messages
145 virtual QList<Message> requestMsgs(BufferInfo buffer, QDateTime since, int offset = -1) = 0;
147 //! Request a range of messages stored in a given buffer.
148 /** \param buffer The buffer we request messages from
149 * \param first Return messages with first <= MsgId <= last
150 * \param last Return messages with first <= MsgId <= last
151 * \return The requested list of messages
153 virtual QList<Message> requestMsgRange(BufferInfo buffer, int first, int last) = 0;
156 //! This is just for importing the old file-based backlog */
157 /** This slot needs to be implemented in the storage backends.
158 * It should first prepare (delete?) the database, then call initBackLogOld(UserId id).
159 * If the importing was successful, backLogEnabledOld will be true afterwards.
161 virtual void importOldBacklog() = 0;
164 //! Sent when a new BufferInfo is created, or an existing one changed somehow.
165 void bufferInfoUpdated(BufferInfo);
166 //! Sent when a new user has been added
167 void userAdded(UserId, const QString &username);
168 //! Sent when a user has been renamed
169 void userRenamed(UserId, const QString &newname);
170 //! Sent when a user has been removed
171 void userRemoved(UserId);
175 struct AuthError : public Exception {};
178 // Old stuff, just for importing old file-based data
179 void initBackLogOld(UserId id);
181 QSqlDatabase logDb; // FIXME this does not belong in the base class!
183 bool backLogEnabledOld;
185 QHash<QString, QList<Message> > backLog;
186 QHash<QString, QFile *> logFiles;
187 QHash<QString, QDataStream *> logStreams;
188 QHash<QString, QDate> logFileDates;
189 QHash<QString, QDir> logFileDirs;