2006-07-09 14:14:57 +00:00
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<title>Module HowTo - Basic concepts</title>
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<link rel="stylesheet" type="text/css" href="style/layout.css">
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2008-01-06 18:15:35 +00:00
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2006-07-09 14:14:57 +00:00
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<div style="text-align: center;">
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<h1>Module HowTo - Basic concepts<br>
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</h1>
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<br>
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<br>
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<div style="text-align: left;"><br>
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<h2>1. Licensing</h2>
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LAM is licensed under the <a href="http://www.gnu.org/licenses/gpl.txt">GNU
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General Public License</a>. This means your plugins need a compatible
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license.<br>
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LAM is distributed with a copy of the GPL license.<br>
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<br>
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<h2>2. Naming and position in directory structure</h2>
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<br>
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Module names are usually named after the object class they manage.
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However, you can use any name you want, it should be short and
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containing only a-z and 0-9. The module name is only shown in the
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configuration dialog, on all other pages LAM will show a provided <span
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style="font-style: italic;">alias</span> name.<br>
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All account modules are stored in <span style="font-weight: bold;">lib/modules</span>.
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The filename must end with <span style="font-weight: bold;">.inc</span>
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and the file must have the same name as its inside class.<br>
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<br>
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<span style="font-weight: bold; text-decoration: underline;">Example:</span>
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Our example module will provide the <span style="font-weight: bold;">class
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ieee802Devic</span><span style="font-style: italic; font-weight: bold;">e</span>,
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therefore the file will be called <span style="font-weight: bold;">lib/modules/ieee802Devic</span><span
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style="font-style: italic; font-weight: bold;">e.inc</span>.<span
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style="font-style: italic;"></span><br>
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<br>
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<br>
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<h2>3. Defining the class</h2>
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All module classes have <span style="font-weight: bold;">baeModule</span>
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as parent class. This provides common functionality and dummy functions
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for all required class functions.<br>
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<br>
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<span style="font-weight: bold;">Example:</span><br>
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<br>
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<table style="width: 100%; text-align: left;" class="mod-code"
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border="0" cellpadding="2" cellspacing="2">
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<tbody>
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<tr>
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<td style="vertical-align: top;">/**<br>
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* Provides MAC addresses for hosts.<br>
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*<br>
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* @package modules<br>
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*/<span style="font-weight: bold;"><br>
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class</span> <span style="color: rgb(255, 0, 0);">ieee802Device</span>
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<span style="font-style: italic;">extends </span><span
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style="font-weight: bold;">baseModule</span> {<br>
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<br>
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}<br>
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</td>
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</tr>
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</tbody>
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</table>
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<br>
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<h2>4. Meta data</h2>
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The module interface inludes a lot of required and optional functions.
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Many of these functions do not need to be implemented directly in the
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module, you can define <span style="font-weight: bold;">meta data</span>
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for them and the <span style="font-weight: bold;">baseModule</span>
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will do the rest.<br>
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Providing <span style="font-weight: bold;">meta data</span> is
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optional, you can implement the required functions in your class, too.<br>
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<br>
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The <span style="font-weight: bold;">baseModule</span> reads the <span
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style="font-weight: bold;">meta data</span> by calling <span
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style="font-weight: bold;">get_metaData()</span> in your class.<br>
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<br>
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<span style="font-weight: bold; text-decoration: underline;">Example:</span><br>
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<br>
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<table style="width: 100%; text-align: left;" class="mod-code"
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border="0" cellpadding="2" cellspacing="2">
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<tbody>
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<tr>
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<td style="vertical-align: top;"> /**<br>
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* Returns meta data that is interpreted by parent
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class<br>
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*<br>
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* @return array array with meta data<br>
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*/<br>
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<span style="font-weight: bold;">function</span> <span
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style="color: rgb(255, 0, 0);">get_metaData</span>() {<br>
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$return = array();<br>
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// manages host accounts<br>
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$return["account_types"] =
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array("host");<br>
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}<br>
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</td>
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</tr>
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</tbody>
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</table>
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<br>
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You will see this functions several times in the next parts of this
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HowTo.<br>
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<br>
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<h2><span style="font-weight: bold;"></span></h2>
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</div>
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</div>
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</body>
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</html>
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