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<h1 id="plugin-system">Plugin System</h1>
<blockquote>
<p>Note: Plugin current status - in development (not merged into master).</p>
</blockquote>
<p><a href="#developer-api"><strong>I am a developer.</strong> Developer API.</a><a href=".html"></a></p>
<p><a href="#guide-for-template-designer"><strong>I am a template designer.</strong> Guide for template designer.</a><a href=".html"></a></p>
<h2 id="developer-api">Developer API</h2>
<h3 id="what-can-i-do-with-plugins">What can I do with plugins?</h3>
<p>The plugin system let you:</p>
<ul>
<li>insert content into specific places across templates.</li>
<li>alter data before templates rendering.</li>
<li>alter data before saving new links.</li>
</ul>
<h3 id="how-can-i-create-a-plugin-for-shaarli">How can I create a plugin for Shaarli?</h3>
<p>First, chose a plugin name, such as <code>demo_plugin</code>.</p>
<p>Under <code>plugin</code> folder, create a folder named with your plugin name. Then create a <plugin_name>.php file in that folder.</p>
<p>You should have the following tree view:</p>
<pre><code>| index.php
| plugins/
|---| demo_plugin/
| |---| demo_plugin.php</code></pre>
<h3 id="understanding-hooks">Understanding hooks</h3>
<p>A plugin is a set of functions. Each function will be triggered by the plugin system at certain point in Shaarli execution.</p>
<p>These functions need to be named with this pattern:</p>
<pre><code>hook_<plugin_name>_<hook_name></code></pre>
<p>For exemple, if my plugin want to add data to the header, this function is needed:</p>
<pre><code>hook_demo_plugin_render_header()</code></pre>
<p>If this function is declared, and the plugin enabled, it will be called every time Shaarli is rendering the header.</p>
<h3 id="plugins-data">Plugin's data</h3>
<h4 id="parameters">Parameters</h4>
<p>Every hook function has a <code>$data</code> parameter. Its content differs for each hooks.</p>
<p><strong>This parameter needs to be returned every time</strong>, otherwise data is lost.</p>
<pre><code>return $data;</code></pre>
<h4 id="filling-templates-placeholder">Filling templates placeholder</h4>
<p>Template placeholders are displayed in template in specific places.</p>
<p>RainTPL displays every element contained in the placeholder's array. These element can be added by plugins.</p>
<p>For example, let's add a value in the placeholder <code>top_placeholder</code> which is displayed at the top of my page:</p>
<div class="sourceCode"><pre class="sourceCode php"><code class="sourceCode php"><span class="kw">$data</span><span class="ot">[</span><span class="st">'top_placeholder'</span><span class="ot">[]</span> = <span class="st">'My content'</span><span class="ot">;](]</span>-=-<span class="st">'My-content'</span><span class="ot">;</span>.html<span class="ot">)</span>
<span class="co"># OR</span>
<span class="fu">array_push</span><span class="ot">(</span><span class="kw">$data</span><span class="ot">[</span><span class="st">'top_placeholder'</span><span class="ot">],</span> <span class="st">'My'</span><span class="ot">,</span> <span class="st">'content'</span><span class="ot">);[](</span>.html<span class="ot">)</span>
<span class="kw">return</span> <span class="kw">$data</span><span class="ot">;</span></code></pre></div>
<h4 id="data-manipulation">Data manipulation</h4>
<p>When a page is displayed, every variable send to the template engine is passed to plugins before that in <code>$data</code>.</p>
<p>The data contained by this array can be altered before template rendering.</p>
<p>For exemple, in linklist, it is possible to alter every title:</p>
<div class="sourceCode"><pre class="sourceCode php"><code class="sourceCode php"><span class="co">// mind the reference if you want $data to be altered</span>
<span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$data</span><span class="ot">[</span><span class="st">'links'</span><span class="ot">]</span> <span class="kw">as</span> &<span class="kw">$value</span><span class="ot">)</span> {<span class="ot">[](</span>.html<span class="ot">)</span>
<span class="co">// String reverse every title.</span>
<span class="kw">$value</span><span class="ot">[</span><span class="st">'title'</span><span class="ot">]</span> = <span class="fu">strrev</span><span class="ot">(</span><span class="kw">$value</span><span class="ot">[</span><span class="st">'title'</span><span class="ot">]);[](</span>.html<span class="ot">)</span>
}
<span class="kw">return</span> <span class="kw">$data</span><span class="ot">;</span></code></pre></div>
<h3 id="metadata">Metadata</h3>
<p>Every plugin needs a <code><plugin_name>.meta</code> file, which is in fact an <code>.ini</code> file (<code>KEY="VALUE"</code>), to be listed in plugin administration.</p>
<p>Each file contain two keys:</p>
<ul>
<li><code>description</code>: plugin description</li>
<li><code>parameters</code>: user parameter names, separated by a <code>;</code>.</li>
</ul>
<blockquote>
<p>Note: In PHP, <code>parse_ini_file()</code> seems to want strings to be between by quotes <code>"</code> in the ini file.</p>
</blockquote>
<h3 id="its-not-working">It's not working!</h3>
<p>Use <code>demo_plugin</code> as a functional example. It covers most of the plugin system features.</p>
<p>If it's still not working, please <a href="https://github.com/shaarli/Shaarli/issues/new">open an issue</a>.<a href=".html"></a></p>
<h3 id="hooks">Hooks</h3>
<table style="width:42%;">
<colgroup>
<col style="width: 19%" />
<col style="width: 22%" />
</colgroup>
<thead>
<tr class="header">
<th>Hooks</th>
<th style="text-align: center;">Description</th>
</tr>
</thead>
<tbody>
<tr class="odd">
<td><a href="#render_header">render_header</a></td>
<td style="text-align: center;">Allow plugin to add content in page headers.</td>
</tr>
<tr class="even">
<td><a href="#render_includes">render_includes</a></td>
<td style="text-align: center;">Allow plugin to include their own CSS files.</td>
</tr>
<tr class="odd">
<td><a href="#render_footer">render_footer</a></td>
<td style="text-align: center;">Allow plugin to add content in page footer and include their own JS files.</td>
</tr>
<tr class="even">
<td><a href="#render_linklist">render_linklist</a></td>
<td style="text-align: center;">It allows to add content at the begining and end of the page, after every link displayed and to alter link data.</td>
</tr>
<tr class="odd">
<td><a href="#render_editlink">render_editlink</a></td>
<td style="text-align: center;">Allow to add fields in the form, or display elements.</td>
</tr>
<tr class="even">
<td><a href="#render_tools">render_tools</a></td>
<td style="text-align: center;">Allow to add content at the end of the page.</td>
</tr>
<tr class="odd">
<td><a href="#render_picwall">render_picwall</a></td>
<td style="text-align: center;">Allow to add content at the top and bottom of the page.</td>
</tr>
<tr class="even">
<td><a href="#render_tagcloud">render_tagcloud</a></td>
<td style="text-align: center;">Allow to add content at the top and bottom of the page.</td>
</tr>
<tr class="odd">
<td><a href="#render_daily">render_daily</a></td>
<td style="text-align: center;">Allow to add content at the top and bottom of the page, the bottom of each link and to alter data.</td>
</tr>
<tr class="even">
<td><a href="#savelink">savelink</a></td>
<td style="text-align: center;">Allow to alter the link being saved in the datastore.</td>
</tr>
</tbody>
</table>
<h4 id="render_header">render_header</h4>
<p>Triggered on every page.</p>
<p>Allow plugin to add content in page headers.</p>
<h5 id="data">Data</h5>
<p><code>$data</code> is an array containing:</p>
<ul>
<li><code>_PAGE_</code>: current target page (eg: <code>linklist</code>, <code>picwall</code>, etc.).</li>
<li><code>_LOGGEDIN_</code>: true if user is logged in, false otherwise.</li>
</ul>
<h5 id="template-placeholders">Template placeholders</h5>
<p>Items can be displayed in templates by adding an entry in <code>$data['<placeholder>']</code> array.<a href=".html"></a></p>
<p>List of placeholders:</p>
<ul>
<li><code>buttons_toolbar</code>: after the list of buttons in the header.</li>
</ul>
<p><img src="http://i.imgur.com/ssJUOrt.png" alt="buttons_toolbar_example" /><a href=".html"></a></p>
<ul>
<li><code>fields_toolbar</code>: after search fields in the header.</li>
</ul>
<blockquote>
<p>Note: This will only be called in linklist.</p>
</blockquote>
<p><img src="http://i.imgur.com/3GMifI2.png" alt="fields_toolbar_example" /><a href=".html"></a></p>
<h4 id="render_includes">render_includes</h4>
<p>Triggered on every page.</p>
<p>Allow plugin to include their own CSS files.</p>
<h5 id="data-1">Data</h5>
<p><code>$data</code> is an array containing:</p>
<ul>
<li><code>_PAGE_</code>: current target page (eg: <code>linklist</code>, <code>picwall</code>, etc.).</li>
<li><code>_LOGGEDIN_</code>: true if user is logged in, false otherwise.</li>
</ul>
<h5 id="template-placeholders-1">Template placeholders</h5>
<p>Items can be displayed in templates by adding an entry in <code>$data['<placeholder>']</code> array.<a href=".html"></a></p>
<p>List of placeholders:</p>
<ul>
<li><code>css_files</code>: called after loading default CSS.</li>
</ul>
<blockquote>
<p>Note: only add the path of the CSS file. E.g: <code>plugins/demo_plugin/custom_demo.css</code>.</p>
</blockquote>
<h4 id="render_footer">render_footer</h4>
<p>Triggered on every page.</p>
<p>Allow plugin to add content in page footer and include their own JS files.</p>
<h5 id="data-2">Data</h5>
<p><code>$data</code> is an array containing:</p>
<ul>
<li><code>_PAGE_</code>: current target page (eg: <code>linklist</code>, <code>picwall</code>, etc.).</li>
<li><code>_LOGGEDIN_</code>: true if user is logged in, false otherwise.</li>
</ul>
<h5 id="template-placeholders-2">Template placeholders</h5>
<p>Items can be displayed in templates by adding an entry in <code>$data['<placeholder>']</code> array.<a href=".html"></a></p>
<p>List of placeholders:</p>
<ul>
<li><code>text</code>: called after the end of the footer text.</li>
</ul>
<p><img src="http://i.imgur.com/L5S2YEH.png" alt="text_example" /><a href=".html"></a></p>
<ul>
<li><code>js_files</code>: called at the end of the page, to include custom JS scripts.</li>
</ul>
<blockquote>
<p>Note: only add the path of the JS file. E.g: <code>plugins/demo_plugin/custom_demo.js</code>.</p>
</blockquote>
<h4 id="render_linklist">render_linklist</h4>
<p>Triggered when <code>linklist</code> is displayed (list of links, permalink, search, tag filtered, etc.).</p>
<p>It allows to add content at the begining and end of the page, after every link displayed and to alter link data.</p>
<h5 id="data-3">Data</h5>
<p><code>$data</code> is an array containing:</p>
<ul>
<li><code>_LOGGEDIN_</code>: true if user is logged in, false otherwise.</li>
<li>All templates data, including links.</li>
</ul>
<h5 id="template-placeholders-3">Template placeholders</h5>
<p>Items can be displayed in templates by adding an entry in <code>$data['<placeholder>']</code> array.<a href=".html"></a></p>
<p>List of placeholders:</p>
<ul>
<li><code>action_plugin</code>: next to the button "private only" at the top and bottom of the page.</li>
</ul>
<p><img src="http://i.imgur.com/Q12PWg0.png" alt="action_plugin_example" /><a href=".html"></a></p>
<ul>
<li><code>link_plugin</code>: for every link, between permalink and link URL.</li>
</ul>
<p><img src="http://i.imgur.com/3oDPhWx.png" alt="link_plugin_example" /><a href=".html"></a></p>
<ul>
<li><code>plugin_start_zone</code>: before displaying the template content.</li>
</ul>
<p><img src="http://i.imgur.com/OVBkGy3.png" alt="plugin_start_zone_example" /><a href=".html"></a></p>
<ul>
<li><code>plugin_end_zone</code>: after displaying the template content.</li>
</ul>
<p><img src="http://i.imgur.com/6IoRuop.png" alt="plugin_end_zone_example" /><a href=".html"></a></p>
<h4 id="render_editlink">render_editlink</h4>
<p>Triggered when the link edition form is displayed.</p>
<p>Allow to add fields in the form, or display elements.</p>
<h5 id="data-4">Data</h5>
<p><code>$data</code> is an array containing:</p>
<ul>
<li>All templates data.</li>
</ul>
<h5 id="template-placeholders-4">Template placeholders</h5>
<p>Items can be displayed in templates by adding an entry in <code>$data['<placeholder>']</code> array.<a href=".html"></a></p>
<p>List of placeholders:</p>
<ul>
<li><code>edit_link_plugin</code>: after tags field.</li>
</ul>
<p><img src="http://i.imgur.com/5u17Ens.png" alt="edit_link_plugin_example" /><a href=".html"></a></p>
<h4 id="render_tools">render_tools</h4>
<p>Triggered when the "tools" page is displayed.</p>
<p>Allow to add content at the end of the page.</p>
<h5 id="data-5">Data</h5>
<p><code>$data</code> is an array containing:</p>
<ul>
<li>All templates data.</li>
</ul>
<h5 id="template-placeholders-5">Template placeholders</h5>
<p>Items can be displayed in templates by adding an entry in <code>$data['<placeholder>']</code> array.<a href=".html"></a></p>
<p>List of placeholders:</p>
<ul>
<li><code>tools_plugin</code>: at the end of the page.</li>
</ul>
<p><img src="http://i.imgur.com/Bqhu9oQ.png" alt="tools_plugin_example" /><a href=".html"></a></p>
<h4 id="render_picwall">render_picwall</h4>
<p>Triggered when picwall is displayed.</p>
<p>Allow to add content at the top and bottom of the page.</p>
<h5 id="data-6">Data</h5>
<p><code>$data</code> is an array containing:</p>
<ul>
<li><code>_LOGGEDIN_</code>: true if user is logged in, false otherwise.</li>
<li>All templates data.</li>
</ul>
<h5 id="template-placeholders-6">Template placeholders</h5>
<p>Items can be displayed in templates by adding an entry in <code>$data['<placeholder>']</code> array.<a href=".html"></a></p>
<p>List of placeholders:</p>
<ul>
<li><p><code>plugin_start_zone</code>: before displaying the template content.</p></li>
<li><p><code>plugin_end_zone</code>: after displaying the template content.</p></li>
</ul>
<p><img src="http://i.imgur.com/tVTQFER.png" alt="plugin_start_end_zone_example" /><a href=".html"></a></p>
<h4 id="render_tagcloud">render_tagcloud</h4>
<p>Triggered when tagcloud is displayed.</p>
<p>Allow to add content at the top and bottom of the page.</p>
<h5 id="data-7">Data</h5>
<p><code>$data</code> is an array containing:</p>
<ul>
<li><code>_LOGGEDIN_</code>: true if user is logged in, false otherwise.</li>
<li>All templates data.</li>
</ul>
<h5 id="template-placeholders-7">Template placeholders</h5>
<p>Items can be displayed in templates by adding an entry in <code>$data['<placeholder>']</code> array.<a href=".html"></a></p>
<p>List of placeholders:</p>
<ul>
<li><p><code>plugin_start_zone</code>: before displaying the template content.</p></li>
<li><p><code>plugin_end_zone</code>: after displaying the template content.</p></li>
</ul>
<p><img src="http://i.imgur.com/vHmyT3a.png" alt="plugin_start_end_zone_example" /><a href=".html"></a></p>
<h4 id="render_daily">render_daily</h4>
<p>Triggered when tagcloud is displayed.</p>
<p>Allow to add content at the top and bottom of the page, the bottom of each link and to alter data.</p>
<h5 id="data-8">Data</h5>
<p><code>$data</code> is an array containing:</p>
<ul>
<li><code>_LOGGEDIN_</code>: true if user is logged in, false otherwise.</li>
<li>All templates data, including links.</li>
</ul>
<h5 id="template-placeholders-8">Template placeholders</h5>
<p>Items can be displayed in templates by adding an entry in <code>$data['<placeholder>']</code> array.<a href=".html"></a></p>
<p>List of placeholders:</p>
<ul>
<li><code>link_plugin</code>: used at bottom of each link.</li>
</ul>
<p><img src="http://i.imgur.com/hzhMfSZ.png" alt="link_plugin_example" /><a href=".html"></a></p>
<ul>
<li><p><code>plugin_start_zone</code>: before displaying the template content.</p></li>
<li><p><code>plugin_end_zone</code>: after displaying the template content.</p></li>
</ul>
<h4 id="savelink">savelink</h4>
<p>Triggered when a link is save (new link or edit).</p>
<p>Allow to alter the link being saved in the datastore.</p>
<h5 id="data-9">Data</h5>
<p><code>$data</code> is an array containing the link being saved:</p>
<ul>
<li>title</li>
<li>url</li>
<li>description</li>
<li>linkdate</li>
<li>private</li>
<li>tags</li>
</ul>
<h2 id="guide-for-template-designer">Guide for template designer</h2>
<h3 id="plugin-administration">Plugin administration</h3>
<p>Your theme must include a plugin administration page: <code>pluginsadmin.html</code>.</p>
<blockquote>
<p>Note: repo's template link needs to be added when the PR is merged.</p>
</blockquote>
<p>Use the default one as an example.</p>
<p>Aside from classic RainTPL loops, plugins order is handle by JavaScript. You can just include <code>plugin_admin.js</code>, only if:</p>
<ul>
<li>you're using a table.</li>
<li>you call orderUp() and orderUp() onclick on arrows.</li>
<li>you add data-line and data-order to your rows.</li>
</ul>
<p>Otherwise, you can use your own JS as long as this field is send by the form:</p>
<p><input type="hidden" name="order_{$key}" value="{$counter}"></p>
<h3 id="placeholder-system">Placeholder system</h3>
<p>In order to make plugins work with every custom themes, you need to add variable placeholder in your templates.</p>
<p>It's a RainTPL loop like this:</p>
<pre><code>{loop="$plugin_variable"}
{$value}
{/loop}</code></pre>
<p>You should enable <code>demo_plugin</code> for testing purpose, since it uses every placeholder available.</p>
<h3 id="list-of-placeholders">List of placeholders</h3>
<p><strong>page.header.html</strong></p>
<p>At the end of the menu:</p>
<pre><code>{loop="$plugins_header.buttons_toolbar"}
{$value}
{/loop}</code></pre>
<p>At the end of file, before clearing floating blocks:</p>
<pre><code>{if="!empty($plugin_errors) && isLoggedIn()"}
<ul class="errors">
{loop="plugin_errors"}
<li>{$value}</li>
{/loop}
</ul>
{/if}</code></pre>
<p><strong>includes.html</strong></p>
<p>At the end of the file:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html">{loop="$plugins_includes.css_files"}
<span class="kw"><link</span><span class="ot"> type=</span><span class="st">"text/css"</span><span class="ot"> rel=</span><span class="st">"stylesheet"</span><span class="ot"> href=</span><span class="st">"{$value}#"</span><span class="kw">/></span>
{/loop}</code></pre></div>
<p><strong>page.footer.html</strong></p>
<p>At the end of your footer notes:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html">{loop="$plugins_footer.text"}
{$value}
{/loop}</code></pre></div>
<p>At the end of file:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html">{loop="$plugins_footer.js_files"}
<span class="kw"><script</span><span class="ot"> src=</span><span class="st">"{$value}#"</span><span class="kw">></script></span>
{/loop}</code></pre></div>
<p><strong>linklist.html</strong></p>
<p>After search fields:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html">{loop="$plugins_header.fields_toolbar"}
{$value}
{/loop}</code></pre></div>
<p>Before displaying the link list (after paging):</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html">{loop="$plugin_start_zone"}
{$value}
{/loop}</code></pre></div>
<p>For every links (icons):</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html">{loop="$value.link_plugin"}
<span class="kw"><span></span>{$value}<span class="kw"></span></span>
{/loop}</code></pre></div>
<p>Before end paging:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html">{loop="$plugin_end_zone"}
{$value}
{/loop}</code></pre></div>
<p><strong>linklist.paging.html</strong></p>
<p>After the "private only" icon:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html">{loop="$action_plugin"}
{$value}
{/loop}</code></pre></div>
<p><strong>editlink.html</strong></p>
<p>After tags field:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html">{loop="$edit_link_plugin"}
{$value}
{/loop}</code></pre></div>
<p><strong>tools.html</strong></p>
<p>After the last tool:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html">{loop="$tools_plugin"}
{$value}
{/loop}</code></pre></div>
<p><strong>picwall.html</strong></p>
<p>Top:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html"><span class="kw"><div</span><span class="ot"> id=</span><span class="st">"plugin_zone_start_picwall"</span><span class="ot"> class=</span><span class="st">"plugin_zone"</span><span class="kw">></span>
{loop="$plugin_start_zone"}
{$value}
{/loop}
<span class="kw"></div></span></code></pre></div>
<p>Bottom:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html"><span class="kw"><div</span><span class="ot"> id=</span><span class="st">"plugin_zone_end_picwall"</span><span class="ot"> class=</span><span class="st">"plugin_zone"</span><span class="kw">></span>
{loop="$plugin_end_zone"}
{$value}
{/loop}
<span class="kw"></div></span></code></pre></div>
<p><strong>tagcloud.html</strong></p>
<p>Top:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html"> <span class="kw"><div</span><span class="ot"> id=</span><span class="st">"plugin_zone_start_tagcloud"</span><span class="ot"> class=</span><span class="st">"plugin_zone"</span><span class="kw">></span>
{loop="$plugin_start_zone"}
{$value}
{/loop}
<span class="kw"></div></span></code></pre></div>
<p>Bottom:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html"> <span class="kw"><div</span><span class="ot"> id=</span><span class="st">"plugin_zone_end_tagcloud"</span><span class="ot"> class=</span><span class="st">"plugin_zone"</span><span class="kw">></span>
{loop="$plugin_end_zone"}
{$value}
{/loop}
<span class="kw"></div></span></code></pre></div>
<p><strong>daily.html</strong></p>
<p>Top:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html"><span class="kw"><div</span><span class="ot"> id=</span><span class="st">"plugin_zone_start_picwall"</span><span class="ot"> class=</span><span class="st">"plugin_zone"</span><span class="kw">></span>
{loop="$plugin_start_zone"}
{$value}
{/loop}
<span class="kw"></div></span></code></pre></div>
<p>After every link:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html"><span class="kw"><div</span><span class="ot"> class=</span><span class="st">"dailyEntryFooter"</span><span class="kw">></span>
{loop="$link.link_plugin"}
{$value}
{/loop}
<span class="kw"></div></span></code></pre></div>
<p>Bottom:</p>
<div class="sourceCode"><pre class="sourceCode html"><code class="sourceCode html"><span class="kw"><div</span><span class="ot"> id=</span><span class="st">"plugin_zone_end_picwall"</span><span class="ot"> class=</span><span class="st">"plugin_zone"</span><span class="kw">></span>
{loop="$plugin_end_zone"}
{$value}
{/loop}
<span class="kw"></div></span></code></pre></div>
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