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<h1>Source code for evennia.commands.default.syscommands</h1><div class="highlight"><pre>
<span></span><span class="sd">&quot;&quot;&quot;</span>
<span class="sd">System commands</span>
<span class="sd">These are the default commands called by the system commandhandler</span>
<span class="sd">when various exceptions occur. If one of these commands are not</span>
<span class="sd">implemented and part of the current cmdset, the engine falls back</span>
<span class="sd">to a default solution instead.</span>
<span class="sd">Some system commands are shown in this module</span>
<span class="sd">as a REFERENCE only (they are not all added to Evennia&#39;s</span>
<span class="sd">default cmdset since they don&#39;t currently do anything differently from the</span>
<span class="sd">default backup systems hard-wired in the engine).</span>
<span class="sd">Overloading these commands in a cmdset can be used to create</span>
<span class="sd">interesting effects. An example is using the NoMatch system command</span>
<span class="sd">to implement a line-editor where you don&#39;t have to start each</span>
<span class="sd">line with a command (if there is no match to a known command,</span>
<span class="sd">the line is just added to the editor buffer).</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="kn">from</span> <span class="nn">evennia.comms.models</span> <span class="k">import</span> <span class="n">ChannelDB</span>
<span class="kn">from</span> <span class="nn">evennia.utils</span> <span class="k">import</span> <span class="n">create</span>
<span class="kn">from</span> <span class="nn">evennia.utils.utils</span> <span class="k">import</span> <span class="n">at_search_result</span>
<span class="c1"># The command keys the engine is calling</span>
<span class="c1"># (the actual names all start with __)</span>
<span class="kn">from</span> <span class="nn">evennia.commands.cmdhandler</span> <span class="k">import</span> <span class="n">CMD_NOINPUT</span>
<span class="kn">from</span> <span class="nn">evennia.commands.cmdhandler</span> <span class="k">import</span> <span class="n">CMD_NOMATCH</span>
<span class="kn">from</span> <span class="nn">evennia.commands.cmdhandler</span> <span class="k">import</span> <span class="n">CMD_MULTIMATCH</span>
<span class="kn">from</span> <span class="nn">evennia.commands.cmdhandler</span> <span class="k">import</span> <span class="n">CMD_CHANNEL</span>
<span class="kn">from</span> <span class="nn">evennia.utils</span> <span class="k">import</span> <span class="n">utils</span>
<span class="kn">from</span> <span class="nn">django.conf</span> <span class="k">import</span> <span class="n">settings</span>
<span class="n">COMMAND_DEFAULT_CLASS</span> <span class="o">=</span> <span class="n">utils</span><span class="o">.</span><span class="n">class_from_module</span><span class="p">(</span><span class="n">settings</span><span class="o">.</span><span class="n">COMMAND_DEFAULT_CLASS</span><span class="p">)</span>
<span class="c1"># Command called when there is no input at line</span>
<span class="c1"># (i.e. an lone return key)</span>
<div class="viewcode-block" id="SystemNoInput"><a class="viewcode-back" href="../../../../api/evennia.commands.default.html#evennia.commands.default.syscommands.SystemNoInput">[docs]</a><span class="k">class</span> <span class="nc">SystemNoInput</span><span class="p">(</span><span class="n">COMMAND_DEFAULT_CLASS</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> This is called when there is no input given</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">key</span> <span class="o">=</span> <span class="n">CMD_NOINPUT</span>
<span class="n">locks</span> <span class="o">=</span> <span class="s2">&quot;cmd:all()&quot;</span>
<div class="viewcode-block" id="SystemNoInput.func"><a class="viewcode-back" href="../../../../api/evennia.commands.default.html#evennia.commands.default.syscommands.SystemNoInput.func">[docs]</a> <span class="k">def</span> <span class="nf">func</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="s2">&quot;Do nothing.&quot;</span>
<span class="k">pass</span></div></div>
<span class="c1">#</span>
<span class="c1"># Command called when there was no match to the</span>
<span class="c1"># command name</span>
<span class="c1">#</span>
<div class="viewcode-block" id="SystemNoMatch"><a class="viewcode-back" href="../../../../api/evennia.commands.default.html#evennia.commands.default.syscommands.SystemNoMatch">[docs]</a><span class="k">class</span> <span class="nc">SystemNoMatch</span><span class="p">(</span><span class="n">COMMAND_DEFAULT_CLASS</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> No command was found matching the given input.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">key</span> <span class="o">=</span> <span class="n">CMD_NOMATCH</span>
<span class="n">locks</span> <span class="o">=</span> <span class="s2">&quot;cmd:all()&quot;</span>
<div class="viewcode-block" id="SystemNoMatch.func"><a class="viewcode-back" href="../../../../api/evennia.commands.default.html#evennia.commands.default.syscommands.SystemNoMatch.func">[docs]</a> <span class="k">def</span> <span class="nf">func</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> This is given the failed raw string as input.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="bp">self</span><span class="o">.</span><span class="n">msg</span><span class="p">(</span><span class="s2">&quot;Huh?&quot;</span><span class="p">)</span></div></div>
<span class="c1">#</span>
<span class="c1"># Command called when there were mulitple matches to the command.</span>
<span class="c1">#</span>
<div class="viewcode-block" id="SystemMultimatch"><a class="viewcode-back" href="../../../../api/evennia.commands.default.html#evennia.commands.default.syscommands.SystemMultimatch">[docs]</a><span class="k">class</span> <span class="nc">SystemMultimatch</span><span class="p">(</span><span class="n">COMMAND_DEFAULT_CLASS</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Multiple command matches.</span>
<span class="sd"> The cmdhandler adds a special attribute &#39;matches&#39; to this</span>
<span class="sd"> system command.</span>
<span class="sd"> matches = [(cmdname, args, cmdobj, cmdlen, mratio, raw_cmdname) , (cmdname, ...), ...]</span>
<span class="sd"> Here, `cmdname` is the command&#39;s name and `args` the rest of the incoming string,</span>
<span class="sd"> without said command name. `cmdobj` is the Command instance, the cmdlen is</span>
<span class="sd"> the same as len(cmdname) and mratio is a measure of how big a part of the</span>
<span class="sd"> full input string the cmdname takes up - an exact match would be 1.0. Finally,</span>
<span class="sd"> the `raw_cmdname` is the cmdname unmodified by eventual prefix-stripping.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">key</span> <span class="o">=</span> <span class="n">CMD_MULTIMATCH</span>
<span class="n">locks</span> <span class="o">=</span> <span class="s2">&quot;cmd:all()&quot;</span>
<div class="viewcode-block" id="SystemMultimatch.func"><a class="viewcode-back" href="../../../../api/evennia.commands.default.html#evennia.commands.default.syscommands.SystemMultimatch.func">[docs]</a> <span class="k">def</span> <span class="nf">func</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Handle multiple-matches by using the at_search_result default handler.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="c1"># this was set by the cmdparser and is a tuple</span>
<span class="c1"># (cmdname, args, cmdobj, cmdlen, mratio, raw_cmdname). See</span>
<span class="c1"># evennia.commands.cmdparse.create_match for more details.</span>
<span class="n">matches</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">matches</span>
<span class="c1"># at_search_result will itself msg the multimatch options to the caller.</span>
<span class="n">at_search_result</span><span class="p">([</span><span class="n">match</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="k">for</span> <span class="n">match</span> <span class="ow">in</span> <span class="n">matches</span><span class="p">],</span> <span class="bp">self</span><span class="o">.</span><span class="n">caller</span><span class="p">,</span> <span class="n">query</span><span class="o">=</span><span class="n">matches</span><span class="p">[</span><span class="mi">0</span><span class="p">][</span><span class="mi">0</span><span class="p">])</span></div></div>
<span class="c1"># Command called when the command given at the command line</span>
<span class="c1"># was identified as a channel name, like there existing a</span>
<span class="c1"># channel named &#39;ooc&#39; and the user wrote</span>
<span class="c1"># &gt; ooc Hello!</span>
<div class="viewcode-block" id="SystemSendToChannel"><a class="viewcode-back" href="../../../../api/evennia.commands.default.html#evennia.commands.default.syscommands.SystemSendToChannel">[docs]</a><span class="k">class</span> <span class="nc">SystemSendToChannel</span><span class="p">(</span><span class="n">COMMAND_DEFAULT_CLASS</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> This is a special command that the cmdhandler calls</span>
<span class="sd"> when it detects that the command given matches</span>
<span class="sd"> an existing Channel object key (or alias).</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">key</span> <span class="o">=</span> <span class="n">CMD_CHANNEL</span>
<span class="n">locks</span> <span class="o">=</span> <span class="s2">&quot;cmd:all()&quot;</span>
<div class="viewcode-block" id="SystemSendToChannel.parse"><a class="viewcode-back" href="../../../../api/evennia.commands.default.html#evennia.commands.default.syscommands.SystemSendToChannel.parse">[docs]</a> <span class="k">def</span> <span class="nf">parse</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">channelname</span><span class="p">,</span> <span class="n">msg</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">args</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">&quot;:&quot;</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">args</span> <span class="o">=</span> <span class="n">channelname</span><span class="o">.</span><span class="n">strip</span><span class="p">(),</span> <span class="n">msg</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span></div>
<div class="viewcode-block" id="SystemSendToChannel.func"><a class="viewcode-back" href="../../../../api/evennia.commands.default.html#evennia.commands.default.syscommands.SystemSendToChannel.func">[docs]</a> <span class="k">def</span> <span class="nf">func</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Create a new message and send it to channel, using</span>
<span class="sd"> the already formatted input.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">caller</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">caller</span>
<span class="n">channelkey</span><span class="p">,</span> <span class="n">msg</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">args</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">msg</span><span class="p">:</span>
<span class="n">caller</span><span class="o">.</span><span class="n">msg</span><span class="p">(</span><span class="s2">&quot;Say what?&quot;</span><span class="p">)</span>
<span class="k">return</span>
<span class="n">channel</span> <span class="o">=</span> <span class="n">ChannelDB</span><span class="o">.</span><span class="n">objects</span><span class="o">.</span><span class="n">get_channel</span><span class="p">(</span><span class="n">channelkey</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">channel</span><span class="p">:</span>
<span class="n">caller</span><span class="o">.</span><span class="n">msg</span><span class="p">(</span><span class="s2">&quot;Channel &#39;</span><span class="si">%s</span><span class="s2">&#39; not found.&quot;</span> <span class="o">%</span> <span class="n">channelkey</span><span class="p">)</span>
<span class="k">return</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">channel</span><span class="o">.</span><span class="n">has_connection</span><span class="p">(</span><span class="n">caller</span><span class="p">):</span>
<span class="n">string</span> <span class="o">=</span> <span class="s2">&quot;You are not connected to channel &#39;</span><span class="si">%s</span><span class="s2">&#39;.&quot;</span>
<span class="n">caller</span><span class="o">.</span><span class="n">msg</span><span class="p">(</span><span class="n">string</span> <span class="o">%</span> <span class="n">channelkey</span><span class="p">)</span>
<span class="k">return</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">channel</span><span class="o">.</span><span class="n">access</span><span class="p">(</span><span class="n">caller</span><span class="p">,</span> <span class="s2">&quot;send&quot;</span><span class="p">):</span>
<span class="n">string</span> <span class="o">=</span> <span class="s2">&quot;You are not permitted to send to channel &#39;</span><span class="si">%s</span><span class="s2">&#39;.&quot;</span>
<span class="n">caller</span><span class="o">.</span><span class="n">msg</span><span class="p">(</span><span class="n">string</span> <span class="o">%</span> <span class="n">channelkey</span><span class="p">)</span>
<span class="k">return</span>
<span class="n">msg</span> <span class="o">=</span> <span class="s2">&quot;[</span><span class="si">%s</span><span class="s2">] </span><span class="si">%s</span><span class="s2">: </span><span class="si">%s</span><span class="s2">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">channel</span><span class="o">.</span><span class="n">key</span><span class="p">,</span> <span class="n">caller</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="n">msg</span><span class="p">)</span>
<span class="n">msgobj</span> <span class="o">=</span> <span class="n">create</span><span class="o">.</span><span class="n">create_message</span><span class="p">(</span><span class="n">caller</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span> <span class="n">channels</span><span class="o">=</span><span class="p">[</span><span class="n">channel</span><span class="p">])</span>
<span class="n">channel</span><span class="o">.</span><span class="n">msg</span><span class="p">(</span><span class="n">msgobj</span><span class="p">)</span></div></div>
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