<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>A first look on the incoming and idle scripts</title><meta name="generator" content="DocBook XSL Stylesheets V1.65.1" /><link rel="home" href="index.html" title="CapiSuite 0.4.5" /><link rel="up" href="ch02.html" title="Chapter 2. Users Guide" /><link rel="previous" href="ch02.html" title="Chapter 2. Users Guide" /><link rel="next" href="ch02s03.html" title="Used file formats" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">A first look on the incoming and idle scripts</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch02.html">Prev</a> </td><th width="60%" align="center">Chapter 2. Users Guide</th><td width="20%" align="right"> <a accesskey="n" href="ch02s03.html">Next</a></td></tr></table><hr /></div><div class="sect1" lang="en" xml:lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="ug_writing_scripts"></a>A first look on the incoming and idle scripts</h2></div></div><div></div></div><p>In <a href="ch01s02.html#howwork" title="How does CapiSuite work?">the section called “How does CapiSuite work?”</a> I already told you that there are two kinds of scripts used in <span class="application">CapiSuite</span>. Now let's have a closer look on them.</p><div class="sect2" lang="en" xml:lang="en"><div class="titlepage"><div><div><h3 class="title"><a id="ug_scripts_incoming"></a>The incoming script</h3></div></div><div></div></div><p>Every time a call is received by <span class="application">CapiSuite</span>, it will call the incoming script - to be precise it will call a function named <tt class="literal">callIncoming</tt> in a python script located somewhere on your disk. This "somewhere" was defined in <a href="ch01s02.html#configcs" title="Configuration of CapiSuite">the section called “Configuration of CapiSuite”</a>, remember?</p><p>So the given script must always define a function with the following signature:</p><pre class="programlisting">def callIncoming(call,service,call_from,call_to): # function body ...</pre><p>The parameters given by <span class="application">CapiSuite</span> are:</p><div class="variablelist"><dl><dt><span class="term">call</span></dt><dd><p>reference to the incoming call. This will be used later in all <span class="application">CapiSuite</span>-functions you call to tell the system which call you mean. You'll only pass this parameter on to other functions - the script can't do anything other with it (it's <span class="emphasis"><em>opaque</em></span>).</p></dd><dt><span class="term">service (integer)</span></dt><dd><p>Service of the incoming call as signalled by the ISDN, set to one of the following values: </p><div class="itemizedlist"><ul type="disc"><li><p><tt class="literal">SERVICE_VOICE</tt>: voice call</p></li><li><p><tt class="literal">SERVICE_FAXG3</tt>: analog fax call</p></li><li><p><tt class="literal">SERVICE_OTHER</tt>: other service not listed above</p></li></ul></div><p> </p></dd><dt><span class="term">call_from (string)</span></dt><dd><p>the number of the calling party (source of the call) as Python string</p></dd><dt><span class="term">call_to (string)</span></dt><dd><p>the number of the called party (destination of the call) as Python string</p></dd></dl></div><p>The first task of the function should be to decide if it wants to accept or reject the call. If it accepts it, it will normally do something with it (receive a fax, record a voice call, play nice announcements, ...) and then disconnect. After it has done all necessary work, it should finish immidiately. In a later chapter, I'll present you some examples which should make things clearer.</p><p>Naturally, you can break down your application in more functions and perhaps more scripts, which will be called and/or imported recursively - but the starting point is always the <span class="emphasis"><em>incoming script</em></span> containing <tt class="literal">callIncoming</tt>. If Python and <span class="application">CapiSuite</span> are correctly installed, you should also be able to import and use any Python module.</p></div><div class="sect2" lang="en" xml:lang="en"><div class="titlepage"><div><div><h3 class="title"><a id="ug_scripts_idle"></a>The idle script</h3></div></div><div></div></div><p>As the incoming script will only be started when a call comes in, we need another mechanism to initiate an outgoing call. As <span class="application">CapiSuite</span> can't know when you plan to do so, it will just call a function named <tt class="literal">idle</tt> in the so called "idle script" in regular intervals. For configuring the intervals and where this script is located, please refer to <a href="ch01s02.html#configcs" title="Configuration of CapiSuite">the section called “Configuration of CapiSuite”</a>.</p><p>The called function must have the following signature:</p><pre class="programlisting">def idle(capi): # function body ...</pre><p>The only parameter given by <span class="application">CapiSuite</span> is:</p><div class="variablelist"><dl><dt><span class="term">capi</span></dt><dd><p>This is a reference to an internal class of <span class="application">CapiSuite</span> which handles the communication with the CAPI interface. You'll have to pass on this parameter to some <span class="application">CapiSuite</span> functions. Nothing else useful you can do with it in your script. This parameter has internal reasons and will possibly (hopefully) go away some day in the future. Just pass it on when told to do so for now.</p></dd></dl></div><p>Now you can do what you want in this function. Most likely, you'll check for a job in an email account, look for a file to send in a special directory or so and place a call to send the job to the right destination.</p><p>Theoretically, you could also accomplish every other periodical task on your system in the idle script - but perhaps we should leave such general things to applications which were designed for this like <span class="application">cron</span>. ;-)</p><p>As above, <tt class="literal">idle</tt> can call other functions or scripts if you like to and all Python modules are available for import.</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch02.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch02.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch02s03.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 2. 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