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                <h1 id="creating-a-simple-package">Creating a simple package<a class="headerlink" href="#creating-a-simple-package" title="Permanent link">#</a></h1>
<h2 id="setup-and-requirements">Setup and Requirements<a class="headerlink" href="#setup-and-requirements" title="Permanent link">#</a></h2>
<p>This guide will help you to create a simple package that provides a simple test
page. It is nothing too fancy, but you can use it as the foundation for your
next project.</p>
<p>There are some requirements you should met before starting:</p>
<ul>
<li>Text editor with syntax highlighting for PHP, <a href="https://notepad-plus-plus.org/">Notepad++</a> is a solid pick</li>
<li><code>*.php</code> and <code>*.tpl</code> should be encoded with ANSI/ASCII</li>
<li><code>*.xml</code> are always encoded with UTF-8, but omit the BOM (byte-order-mark)</li>
<li>Use tabs instead of spaces to indent lines</li>
<li>It is recommended to set the tab width to <code>8</code> spaces, this is used in the entire software and will ease reading the source files</li>
<li>An active installation of WoltLab Suite 3</li>
<li>An application to create <code>*.tar</code> archives, e.g. <a href="http://www.7-zip.org/">7-Zip</a> on Windows</li>
</ul>
<h2 id="the-packagexml-file">The package.xml File<a class="headerlink" href="#the-packagexml-file" title="Permanent link">#</a></h2>
<p>We want to create a simple page that will display the sentence "Hello World" embedded
into the application frame. Create an empty directory in the workspace of your choice
to start with.</p>
<p>Create a new file called <code>package.xml</code> and insert the code below:</p>
<div class="highlight"><pre><span></span><code><span class="cp">&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;</span>
<span class="nt">&lt;package</span> <span class="na">xmlns=</span><span class="s">&quot;http://www.woltlab.com&quot;</span> <span class="na">xmlns:xsi=</span><span class="s">&quot;http://www.w3.org/2001/XMLSchema-instance&quot;</span> <span class="na">xsi:schemaLocation=</span><span class="s">&quot;http://www.woltlab.com http://www.woltlab.com/XSD/2019/package.xsd&quot;</span> <span class="na">name=</span><span class="s">&quot;com.example.test&quot;</span><span class="nt">&gt;</span>
    <span class="nt">&lt;packageinformation&gt;</span>
        <span class="c">&lt;!-- com.example.test --&gt;</span>
        <span class="nt">&lt;packagename&gt;</span>Simple Package<span class="nt">&lt;/packagename&gt;</span>
        <span class="nt">&lt;packagedescription&gt;</span>A simple package to demonstrate the package system of WoltLab Suite Core<span class="nt">&lt;/packagedescription&gt;</span>
        <span class="nt">&lt;version&gt;</span>1.0.0<span class="nt">&lt;/version&gt;</span>
        <span class="nt">&lt;date&gt;</span>2019-04-28<span class="nt">&lt;/date&gt;</span>
    <span class="nt">&lt;/packageinformation&gt;</span>
    <span class="nt">&lt;authorinformation&gt;</span>
        <span class="nt">&lt;author&gt;</span>Your Name<span class="nt">&lt;/author&gt;</span>
        <span class="nt">&lt;authorurl&gt;</span>http://www.example.com<span class="nt">&lt;/authorurl&gt;</span>
    <span class="nt">&lt;/authorinformation&gt;</span>
    <span class="nt">&lt;excludedpackages&gt;</span>
        <span class="nt">&lt;excludedpackage</span> <span class="na">version=</span><span class="s">&quot;6.0.0 Alpha 1&quot;</span><span class="nt">&gt;</span>com.woltlab.wcf<span class="nt">&lt;/excludedpackage&gt;</span>
    <span class="nt">&lt;/excludedpackages&gt;</span>
    <span class="nt">&lt;instructions</span> <span class="na">type=</span><span class="s">&quot;install&quot;</span><span class="nt">&gt;</span>
        <span class="nt">&lt;instruction</span> <span class="na">type=</span><span class="s">&quot;file&quot;</span> <span class="nt">/&gt;</span>
        <span class="nt">&lt;instruction</span> <span class="na">type=</span><span class="s">&quot;template&quot;</span> <span class="nt">/&gt;</span>
        <span class="nt">&lt;instruction</span> <span class="na">type=</span><span class="s">&quot;page&quot;</span> <span class="nt">/&gt;</span>
    <span class="nt">&lt;/instructions&gt;</span>
<span class="nt">&lt;/package&gt;</span>
</code></pre></div>
<p>There is an <a href="../package/package-xml/">entire chapter</a> on the package system that explains what the code above
does and how you can adjust it to fit your needs. For now we'll keep it as it is.</p>
<h2 id="the-php-class">The PHP Class<a class="headerlink" href="#the-php-class" title="Permanent link">#</a></h2>
<p>The next step is to create the PHP class which will serve our page:</p>
<ol>
<li>Create the directory <code>files</code> in the same directory where <code>package.xml</code> is located</li>
<li>Open <code>files</code> and create the directory <code>lib</code></li>
<li>Open <code>lib</code> and create the directory <code>page</code></li>
<li>Within the directory <code>page</code>, please create the file <code>TestPage.class.php</code></li>
</ol>
<p>Copy and paste the following code into the <code>TestPage.class.php</code>:</p>
<div class="highlight"><pre><span></span><code><span class="o">&lt;?</span><span class="nx">php</span>
<span class="k">namespace</span> <span class="nx">wcf\page</span><span class="p">;</span>
<span class="k">use</span> <span class="nx">wcf\system\WCF</span><span class="p">;</span>

<span class="sd">/**</span>
<span class="sd"> * A simple test page for demonstration purposes.</span>
<span class="sd"> *</span>
<span class="sd"> * @author  YOUR NAME</span>
<span class="sd"> * @license GNU Lesser General Public License &lt;http://opensource.org/licenses/lgpl-license.php&gt;</span>
<span class="sd"> */</span>
<span class="k">class</span> <span class="nc">TestPage</span> <span class="k">extends</span> <span class="nx">AbstractPage</span> <span class="p">{</span>
    <span class="sd">/**</span>
<span class="sd">     * @var string</span>
<span class="sd">     */</span>
    <span class="k">protected</span> <span class="nv">$greet</span> <span class="o">=</span> <span class="s1">&#39;&#39;</span><span class="p">;</span>

    <span class="sd">/**</span>
<span class="sd">     * @inheritDoc</span>
<span class="sd">     */</span>
    <span class="k">public</span> <span class="k">function</span> <span class="nf">readParameters</span><span class="p">()</span> <span class="p">{</span>
        <span class="k">parent</span><span class="o">::</span><span class="na">readParameters</span><span class="p">();</span>

        <span class="k">if</span> <span class="p">(</span><span class="nb">isset</span><span class="p">(</span><span class="nv">$_GET</span><span class="p">[</span><span class="s1">&#39;greet&#39;</span><span class="p">]))</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">greet</span> <span class="o">=</span> <span class="nv">$_GET</span><span class="p">[</span><span class="s1">&#39;greet&#39;</span><span class="p">];</span>
    <span class="p">}</span>

    <span class="sd">/**</span>
<span class="sd">     * @inheritDoc</span>
<span class="sd">     */</span>
    <span class="k">public</span> <span class="k">function</span> <span class="nf">readData</span><span class="p">()</span> <span class="p">{</span>
        <span class="k">parent</span><span class="o">::</span><span class="na">readData</span><span class="p">();</span>

        <span class="k">if</span> <span class="p">(</span><span class="k">empty</span><span class="p">(</span><span class="nv">$this</span><span class="o">-&gt;</span><span class="na">greet</span><span class="p">))</span> <span class="p">{</span>
            <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">greet</span> <span class="o">=</span> <span class="s1">&#39;World&#39;</span><span class="p">;</span>
        <span class="p">}</span>
    <span class="p">}</span>

    <span class="sd">/**</span>
<span class="sd">     * @inheritDoc</span>
<span class="sd">     */</span>
    <span class="k">public</span> <span class="k">function</span> <span class="nf">assignVariables</span><span class="p">()</span> <span class="p">{</span>
        <span class="k">parent</span><span class="o">::</span><span class="na">assignVariables</span><span class="p">();</span>

        <span class="nx">WCF</span><span class="o">::</span><span class="na">getTPL</span><span class="p">()</span><span class="o">-&gt;</span><span class="na">assign</span><span class="p">([</span>
            <span class="s1">&#39;greet&#39;</span> <span class="o">=&gt;</span> <span class="nv">$this</span><span class="o">-&gt;</span><span class="na">greet</span>
        <span class="p">]);</span>
    <span class="p">}</span>
<span class="p">}</span>
</code></pre></div>
<p>The class inherits from <a href="https://github.com/WoltLab/WCF/blob/master/wcfsetup/install/files/lib/page/AbstractPage.class.php">wcf\page\AbstractPage</a>, the default implementation of pages without form controls. It
defines quite a few methods that will be automatically invoked in a specific order, for example <code>readParameters()</code> before <code>readData()</code> and finally <code>assignVariables()</code> to pass arbitrary values to the template.</p>
<p>The property <code>$greet</code> is defined as <code>World</code>, but can optionally be populated through a GET variable (<code>index.php?test/&amp;greet=You</code> would output <code>Hello You!</code>). This extra code illustrates the separation of data
processing that takes place within all sort of pages, where all user-supplied data is read from within a single method. It helps organizing the code, but most of all it enforces a clean class logic that does not
start reading user input at random places, including the risk to only escape the input of variable <code>$_GET['foo']</code> 4 out of 5 times.</p>
<p>Reading and processing the data is only half the story, now we need a template to display the actual content for our page. You don't need to specify it yourself, it will be automatically guessed based on your
namespace and class name, you can <a href="#template-guessing">read more about it later</a>.</p>
<p>Last but not least, you must not include the closing PHP tag <code>?&gt;</code> at the end, it can cause PHP to break on whitespaces and is not required at all.</p>
<h2 id="the-template">The Template<a class="headerlink" href="#the-template" title="Permanent link">#</a></h2>
<p>Navigate back to the root directory of your package until you see both the <code>files</code> directory and the <code>package.xml</code>. Now create a directory called <code>templates</code>, open it and create the file <code>test.tpl</code>.</p>
<div class="highlight"><pre><span></span><code><span class="cp">{</span><span class="nf">include</span> <span class="na">file</span><span class="o">=</span><span class="s1">&#39;header&#39;</span><span class="cp">}</span><span class="x"></span>

<span class="x">&lt;div class=&quot;section&quot;&gt;</span>
<span class="x">    Hello </span><span class="cp">{</span><span class="nv">$greet</span><span class="cp">}</span><span class="x">!</span>
<span class="x">&lt;/div&gt;</span>

<span class="cp">{</span><span class="nf">include</span> <span class="na">file</span><span class="o">=</span><span class="s1">&#39;footer&#39;</span><span class="cp">}</span><span class="x"></span>
</code></pre></div>
<p>Templates are a mixture of HTML and Smarty-like template scripting to overcome the static nature of raw HTML. The above code will display the phrase <code>Hello World!</code> in the application frame, just as any other
page would render. The included templates <code>header</code> and <code>footer</code> are responsible for the majority of the overall page functionality, but offer a whole lot of customization abilities to influence their behavior and appearance.</p>
<h2 id="the-page-definition">The Page Definition<a class="headerlink" href="#the-page-definition" title="Permanent link">#</a></h2>
<p>The package now contains the PHP class and the matching template, but it is still missing the page definition. Please create the file <code>page.xml</code> in your project's root directory, thus on the same level as the <code>package.xml</code>.</p>
<div class="highlight"><pre><span></span><code><span class="cp">&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;</span>
<span class="nt">&lt;data</span> <span class="na">xmlns=</span><span class="s">&quot;http://www.woltlab.com&quot;</span> <span class="na">xmlns:xsi=</span><span class="s">&quot;http://www.w3.org/2001/XMLSchema-instance&quot;</span> <span class="na">xsi:schemaLocation=</span><span class="s">&quot;http://www.woltlab.com http://www.woltlab.com/XSD/2019/page.xsd&quot;</span><span class="nt">&gt;</span>
    <span class="nt">&lt;import&gt;</span>
        <span class="nt">&lt;page</span> <span class="na">identifier=</span><span class="s">&quot;com.example.test.Test&quot;</span><span class="nt">&gt;</span>
            <span class="nt">&lt;controller&gt;</span>wcf\page\TestPage<span class="nt">&lt;/controller&gt;</span>
            <span class="nt">&lt;name</span> <span class="na">language=</span><span class="s">&quot;en&quot;</span><span class="nt">&gt;</span>Test Page<span class="nt">&lt;/name&gt;</span>
            <span class="nt">&lt;pageType&gt;</span>system<span class="nt">&lt;/pageType&gt;</span>
        <span class="nt">&lt;/page&gt;</span>
    <span class="nt">&lt;/import&gt;</span>
<span class="nt">&lt;/data&gt;</span>
</code></pre></div>
<p>You can provide a lot more data for a page, including logical nesting and dedicated handler classes for display in menus.</p>
<h2 id="building-the-package">Building the Package<a class="headerlink" href="#building-the-package" title="Permanent link">#</a></h2>
<p>If you have followed the above guidelines carefully, your package directory should now look like this:</p>
<div class="highlight"><pre><span></span><code>├── files
│   └── lib
│       ├── page
│       │   ├── TestPage.class.php
├── package.xml
├── page.xml
├── templates
│   └── test.tpl
</code></pre></div>
<p>Both files and templates are archive-based package components, that deploy their payload using tar archives rather than adding the raw files to the package file. Please create the archive <code>files.tar</code> and add the contents of the <code>files/*</code> directory, but not the directory <code>files/</code> itself. Repeat the same process for the <code>templates</code> directory, but this time with the file name <code>templates.tar</code>. Place both files in the root of your project.</p>
<p>Last but not least, create the package archive <code>com.example.test.tar</code> and add all the files listed below.</p>
<ul>
<li><code>files.tar</code></li>
<li><code>package.xml</code></li>
<li><code>page.xml</code></li>
<li><code>templates.tar</code></li>
</ul>
<p>The archive's filename can be anything you want, all though it is the general convention to use the package name itself for easier recognition.</p>
<h2 id="installation">Installation<a class="headerlink" href="#installation" title="Permanent link">#</a></h2>
<p>Open the Administration Control Panel and navigate to <code>Configuration &gt; Packages &gt; Install Package</code>, click on <code>Upload Package</code> and select the file <code>com.example.test.tar</code> from your disk. Follow the on-screen instructions until it has been successfully installed.</p>
<p>Open a new browser tab and navigate to your newly created page. If WoltLab Suite is installed at <code>https://example.com/wsc/</code>, then the URL should read <code>https://example.com/wsc/index.php?test/</code>.</p>
<p>Congratulations, you have just created your first package!</p>
<h2 id="developer-tools">Developer Tools<a class="headerlink" href="#developer-tools" title="Permanent link">#</a></h2>
<div class="admonition warning">
<p class="admonition-title">This feature is available with WoltLab Suite 3.1 or newer only.</p>
</div>
<p>The developer tools provide an interface to synchronize the data of an installed package with a bare repository on the local disk. You can re-import most PIPs at any time and have the changes applied without crafting a manual update. This process simulates a regular package update with a single PIP only, and resets the cache after the import has been completed.</p>
<h3 id="registering-a-project">Registering a Project<a class="headerlink" href="#registering-a-project" title="Permanent link">#</a></h3>
<p>Projects require the absolute path to the package directory, that is, the directory where it can find the <code>package.xml</code>. It is not required to install an package to register it as a project, but you have to install it in order to work with it. It does not install the package by itself!</p>
<p>There is a special button on the project list that allows for a mass-import of projects based on a search path. Each direct child directory of the provided path will be tested and projects created this way will use the identifier extracted from the <code>package.xml</code>.</p>
<h3 id="synchronizing">Synchronizing<a class="headerlink" href="#synchronizing" title="Permanent link">#</a></h3>
<p>The install instructions in the <code>package.xml</code> are ignored when offering the PIP imports, the detection works entirely based on the default filename for each PIP. On top of that, only PIPs that implement the interface <code>wcf\system\devtools\pip\IIdempotentPackageInstallationPlugin</code> are valid for import, as it indicates that importing the PIP multiple times will have no side-effects and that the result is deterministic regardless of the number of times it has been imported.</p>
<p>Some built-in PIPs, such as <code>sql</code> or <code>script</code>, do not qualify for this step and remain unavailable at all times. However, you can still craft and perform an actual package update to have these PIPs executed.</p>
<h2 id="appendix">Appendix<a class="headerlink" href="#appendix" title="Permanent link">#</a></h2>
<h3 id="template-guessing">Template Guessing<a class="headerlink" href="#template-guessing" title="Permanent link">#</a></h3>
<p>The class name including the namespace is used to automatically determine the path to the template and its name. The example above used the page class name <code>wcf\page\TestPage</code> that is then split into four distinct parts:</p>
<ol>
<li><code>wcf</code>, the internal abbreviation of WoltLab Suite Core (previously known as WoltLab Community Framework)</li>
<li><code>\page\</code> (ignored)</li>
<li><code>Test</code>, the actual name that is used for both the template and the URL</li>
<li><code>Page</code> (page type, ignored)</li>
</ol>
<p>The fragments <code>1.</code> and <code>3.</code> from above are used to construct the path to the template: <code>&lt;installDirOfWSC&gt;/templates/test.tpl</code> (the first letter of <code>Test</code> is being converted to lower-case).</p>
                
                  
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