mirror of
https://github.com/moparisthebest/xeps
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323 lines
11 KiB
XML
323 lines
11 KiB
XML
<?xml version='1.0' encoding='UTF-8'?>
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<!DOCTYPE xep SYSTEM 'xep.dtd' [
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<!ENTITY % ents SYSTEM 'xep.ent'>
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%ents;
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<!ENTITY FEATURE "<feature/>">
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<!ENTITY NAME "<name/>">
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<!ENTITY MOVE "<move/>">
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<!ENTITY TURN "<turn/>">
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<!ENTITY GAME "<game/>">
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<!ENTITY xep-mug "<span class='ref'><link url='http://pidgin-games.sourceforge.net/xep/multi-user_gaming.html'>Multi-User Gaming</link></span> <note>XEP-xxxx: Multi-User Gaming <<link url='http://pidgin-games.sourceforge.net/xep/multi-user_gaming.html'>http://pidgin-games.sourceforge.net/xep/multi-user_gaming.html</link>>.</note>" >
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]>
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<?xml-stylesheet type='text/xsl' href='xep.xsl'?>
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<xep>
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<header>
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<title>Server-based Tic-tac-toe</title>
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<abstract>This document defines how to play a Tic-tac-toe game over XMPP</abstract>
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&LEGALNOTICE;
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<number>xxxx</number>
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<status>ProtoXEP</status>
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<type>Standards Track</type>
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<sig>Standards</sig>
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<approver>Council</approver>
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<dependencies>
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<spec>XMPP Core</spec>
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<spec>XEP-xxxx</spec>
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</dependencies>
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<supersedes/>
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<supersededby/>
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<shortname>Not yet assigned</shortname>
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<author>
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<firstname>Arne</firstname>
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<surname>König</surname>
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<email>arne.ko(ät)23inch.de</email>
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<jid>arne++(ät)jabber.ccc.de</jid>
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</author>
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<author>
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<firstname>Günther</firstname>
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<surname>Nieß</surname>
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<email>guenther.niess(ät)web.de</email>
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<jid>niess(ät)jabber.ccc.de</jid>
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</author>
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<revision>
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<version>0.0.1</version>
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<date>2009-03-14</date>
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<initials>ak</initials>
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<remark>
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<p>First Draft.</p>
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</remark>
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</revision>
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</header>
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<section1 topic='Introduction' anchor='intro'>
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<p>
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It is quite common to play games over IM networks.
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Since Tic-tac-toe is a well-known and simple game,
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it's a good example for a server-based game protocol.
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</p>
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</section1>
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<section1 topic='Requirements' anchor='reqs'>
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<p>
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This document addresses the requirements for a game protocol as defined by &xep-mug;.
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In particular this consists of:
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</p>
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<ol start='1'>
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<li>game roles</li>
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<li>match state</li>
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<li>turns</li>
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<li>match configuration</li>
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<li>conditions for interrupting and terminating a match</li>
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</ol>
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<p>
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The extensions needed to implement these requirements are qualified by the 'http://jabber.org/protocol/mug/tictactoe' namespace.
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</p>
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</section1>
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<section1 topic='Discovering Support' anchor='support'>
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<p>
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An entity implementing this protocol MUST also support &xep-mug; and answer to disco requests accordingly
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including both the Multi-User Gaming and the game &FEATURE; elements in the response.
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</p>
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<example caption='Service Informs Juliet That It is Capable of Hosting Tic-tac-toe'><![CDATA[
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<iq type='result'
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from='games.shakespeare.lit'
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id='disco1'
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to='juliet@capulet.com/garden'>
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<query xmlns='http://jabber.org/protocol/disco#info'>
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...
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<feature var='http://jabber.org/protocol/mug'/>
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<feature var='http://jabber.org/protocol/mug/tictactoe'/>
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...
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</query>
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</iq>
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]]></example>
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</section1>
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<section1 topic='Game Roles' anchor='roles'>
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<p>
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A Tic-tac-toe game uses two game roles, "x" and "o".
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Both roles have to be assigned to exactly one player to start a match.
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If one role gets unassigned or a player gets unavailable the match has to be paused.
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</p>
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</section1>
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<section1 topic='Match Configuration' anchor='config'>
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<p>
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A service SHOULD offer a configuration form with the following options:
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</p>
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<ol start='1'>
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<li>starting role ("mug/tictactoe#config_first")</li>
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<li>size of the board ("mug/tictactoe#config_rows" and "mug/tictactoe#config_cols")</li>
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<li>the number of marks in a row needed to win ("mug/tictactoe#config_first")</li>
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</ol>
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<p>
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An implementation MUST be able to handle the a board with three cols and rows
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and three respective marks to win.
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Everything beyond that is OPTIONAL.
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</p>
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<example caption='Service Sends Configuration Form'><![CDATA[
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<iq from='tictactoe@games.shakespeare.lit'
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id='config1'
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to='juliet@capulet.com/garden'
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type='result'>
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<query xmlns='http://jabber.org/protocol/mug#owner'>
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<options>
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<x xmlns='jabber:x:data' type='form'>
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<title>Tic-tac-toe Room</title>
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...
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</x>
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<options xmlns='http://jabber.org/protocol/mug/tictactoe'>
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<x xmlns='jabber:x:data' type='form'>
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<title>Configuration for Tic-tac-toe</title>
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<instructions>
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Below you can see the default configuration.
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To accept the default configuration, click OK.
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To select a different configuration, please complete this form.
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</instructions>
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<field var='FORM_TYPE' type='hidden'>
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<value>http://jabber.org/protocol/mug/tictactoe#tictactoeconfig</value>
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</field>
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<field label='Number of rows' var='mug/tictactoe#config_rows' type='list-single'>
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<value>3</value>
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<option label='3'><value>3</value></option>
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<option label='4'><value>4</value></option>
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<option label='5'><value>5</value></option>
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<option label='6'><value>6</value></option>
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<option label='7'><value>7</value></option>
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<option label='8'><value>8</value></option>
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<option label='9'><value>9</value></option>
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<option label='10'><value>10</value></option>
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</field>
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<field label='Number of cols' var='mug/tictactoe#config_cols' type='list-single'>
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<value>3</value>
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<option label='3'><value>3</value></option>
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<option label='4'><value>4</value></option>
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<option label='5'><value>5</value></option>
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<option label='6'><value>6</value></option>
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<option label='7'><value>7</value></option>
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<option label='8'><value>8</value></option>
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<option label='9'><value>9</value></option>
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<option label='10'><value>10</value></option>
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</field>
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<field label='Strike' var='mug/tictactoe#config_strike' type='list-single'>
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<value>3</value>
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<option label='3'><value>3</value></option>
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<option label='4'><value>4</value></option>
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<option label='5'><value>5</value></option>
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<option label='6'><value>6</value></option>
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<option label='7'><value>7</value></option>
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<option label='8'><value>8</value></option>
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<option label='9'><value>9</value></option>
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<option label='10'><value>10</value></option>
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</field>
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<field label='Select a role who start the game' var='mug/tictactoe#config_first' type='list-single'>
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<value>x</value>
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<option label='x'><value>x</value></option>
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<option label='o'><value>o</value></option>
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</field>
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</x>
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</options>
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</options>
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</query>
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</iq>
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]]></example>
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<p>
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Submitting a strike option value bigger than the number of rows or columns SHOULD
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result in ¬acceptable; error.
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</p>
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</section1>
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<section1 topic='Match State' anchor='state'>
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<p>
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The state in a Tic-tac-toe match represents the match configuration,
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the player who makes the next turn
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and the current state of the board. Every state is distributed to all occupants.
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</p>
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<example caption='Service Sends Start State'><![CDATA[
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<presence
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from='tictactoe@games.shakespeare.lit'
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to='juliet@capulet.com/garden'>
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<game xmlns='http://jabber.org/protocol/mug'>
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<status>inactive</status>
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<state xmlns='http://jabber.org/protocol/mug/tictactoe'>
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<rows>3</rows>
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<cols>3</cols>
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<strike>3</strike>
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<next>x</next>
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<board/>
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</state>
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</game>
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</presence>
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]]></example>
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<p>
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After a valid turn, the state gets updated with the corresponding mark.
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</p>
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<example caption='Service Sends Mid-Game State'><![CDATA[
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<presence
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from='tictactoe@games.shakespeare.lit'
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to='juliet@capulet.com/garden'>
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<game xmlns='http://jabber.org/protocol/mug'>
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<status>active</status>
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<state xmlns='http://jabber.org/protocol/mug/tictactoe'>
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<rows>3</rows>
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<cols>3</cols>
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<strike>3</strike>
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<next>o</next>
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<board>
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<field row='1' col='1'>x</field>
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<field row='2' col='1'>o</field>
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<field row='2' col='2'>x</field>
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<field row='1' col='3'>o</field>
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<field row='2' col='3'>x</field>
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</board>
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</state>
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</game>
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]]></example>
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<p>
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The match is considered terminated when the board is full or
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when one player reaches the number of respective marks as defined by the strike option.
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After termination the service broadcasts the final state including either a <draw>
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or <won> (including a game role) element to indicate the resulting score
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and the initial state of the next round.
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</p>
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<example caption='Service Sends Draw State'><![CDATA[
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<presence
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from='tictactoe@games.shakespeare.lit'
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to='juliet@capulet.com/garden'>
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<game xmlns='http://jabber.org/protocol/mug'>
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<status>inactive</status>
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<state xmlns='http://jabber.org/protocol/mug/tictactoe'>
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<rows>3</rows>
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<cols>3</cols>
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<strike>3</strike>
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<next>o</next>
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<board/>
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<won>x</won>
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</state>
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</game>
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</presence>
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]]></example>
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</section1>
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<section1 topic='Turns' anchor='turn'>
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<p>
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During the game, players change in turn, each of them MUST send only one move at a time.
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It MUST possess these attributes:
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</p>
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<table caption='&MOVE; attributes'>
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<tr>
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<td><strong>Name</strong></td>
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<td><strong>Type</strong></td>
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<td><strong>Description</strong></td>
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</tr>
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<tr>
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<td>'id'</td>
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<td>REQUIRED</td>
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<td>The number of the move. First move is 1.</td>
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</tr>
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<tr>
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<td>'row'</td>
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<td>REQUIRED</td>
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<td>The horizontal position of the mark.</td>
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</tr>
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<tr>
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<td>'col'</td>
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<td>REQUIRED</td>
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<td>The vertical position of the mark.</td>
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</tr>
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</table>
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<example caption='Juliet Sends a Move'><![CDATA[
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<message
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to='tictactoe@games.shakespeare.lit'
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from='juliet@capulet.com/garden'
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type='chat'>
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<turn xmlns='http://jabber.org/protocol/mug#user'>
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<move
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xmlns='http://jabber.org/protocol/mug/tictactoe'
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row='3'
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col='2'
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id='7'/>
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</turn>
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</message>
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]]></example>
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</section1>
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<section1 topic='Security Considerations' anchor='security'>
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<p>
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The author is not aware of any security issues introduced by this protocol extension.
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</p>
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</section1>
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<section1 topic='IANA Considerations' anchor='iana'>
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<p>This document requires no interaction with &IANA;.</p>
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</section1>
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<section1 topic='XMPP Registrar Considerations' anchor='registrar'>
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<p>The ®ISTRAR; shall include 'http://jabber.org/protocol/mug/tictactoe' in its registry of protocols.</p>
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</section1>
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<section1 topic='XML Schema' anchor='schema'>
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</section1>
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</xep>
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