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<li><a class="toctree-l4" href="#what-can-i-do-with-plugins">What can I do with plugins?</a></li>
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<p><a href="#developer-api"><strong>I am a developer.</strong> Developer API.</a></p>
<p><a href="#guide-for-template-designer"><strong>I am a template designer.</strong> Guide for template designer.</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="plugin-initialization">Plugin initialization</h3>
<p>At the beginning of Shaarli execution, all enabled plugins are loaded. At this point, the plugin system looks for an <code>init()</code> function to execute and run it if it exists. This function must be named this way, and takes the <code>ConfigManager</code> as parameter.</p>
<pre><code><plugin_name>_init($conf)
</code></pre>
<p>This function can be used to create initial data, load default settings, etc. But also to set <em>plugin errors</em>. If the initialization function returns an array of strings, they will be understand as errors, and displayed in the header to logged in users.</p>
<h3 id="understanding-hooks">Understanding hooks</h3>
<p>A plugin is a set of functions. Each function will be triggered by the plugin system at certain point in Shaarli execution.</p>
<p>These functions need to be named with this pattern:</p>
<pre><code>hook_<plugin_name>_<hook_name>($data, $conf)
</code></pre>
<p>Parameters:</p>
<ul>
<li>data: see <a href="https://github.com/shaarli/Shaarli/wiki/Plugin-System#plugins-data">$data section</a></li>
<li>conf: the <code>ConfigManager</code> instance.</li>
</ul>
<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 $data;
</code></pre>
<h4 id="filling-templates-placeholder">Filling templates placeholder</h4>
<p>Template placeholders are displayed in template in specific places.</p>
<p>RainTPL displays every element contained in the placeholder's array. These element can be added by plugins.</p>
<p>For example, let's add a value in the placeholder <code>top_placeholder</code> which is displayed at the top of my page:</p>
<pre><code class="php">$data['top_placeholder'][] = 'My content';
# OR
array_push($data['top_placeholder'], 'My', 'content');
return $data;
</code></pre>
<h4 id="data-manipulation">Data manipulation</h4>
<p>When a page is displayed, every variable send to the template engine is passed to plugins before that in <code>$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>
<pre><code class="php">// mind the reference if you want $data to be altered
foreach ($data['links'] as &$value) {
// String reverse every title.
$value['title'] = strrev($value['title']);
}
return $data;
</code></pre>
<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>
<li><code>parameter.<PARAMETER_NAME></code>: add a text description the specified parameter.</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>.</p>
<h3 id="hooks">Hooks</h3>
<table>
<thead>
<tr>
<th>Hooks</th>
<th align="center">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="#render_header">render_header</a></td>
<td align="center">Allow plugin to add content in page headers.</td>
</tr>
<tr>
<td><a href="#render_includes">render_includes</a></td>
<td align="center">Allow plugin to include their own CSS files.</td>
</tr>
<tr>
<td><a href="#render_footer">render_footer</a></td>
<td align="center">Allow plugin to add content in page footer and include their own JS files.</td>
</tr>
<tr>
<td><a href="#render_linklist">render_linklist</a></td>
<td 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>
<td><a href="#render_editlink">render_editlink</a></td>
<td align="center">Allow to add fields in the form, or display elements.</td>
</tr>
<tr>
<td><a href="#render_tools">render_tools</a></td>
<td align="center">Allow to add content at the end of the page.</td>
</tr>
<tr>
<td><a href="#render_picwall">render_picwall</a></td>
<td align="center">Allow to add content at the top and bottom of the page.</td>
</tr>
<tr>
<td><a href="#render_tagcloud">render_tagcloud</a></td>
<td align="center">Allow to add content at the top and bottom of the page, and after all tags.</td>
</tr>
<tr>
<td><a href="#render_taglist">render_taglist</a></td>
<td align="center">Allow to add content at the top and bottom of the page, and after all tags.</td>
</tr>
<tr>
<td><a href="#render_daily">render_daily</a></td>
<td 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>
<td><a href="#render_feed">render_feed</a></td>
<td align="center">Allow to do add tags in RSS and ATOM feeds.</td>
</tr>
<tr>
<td><a href="#save_link">save_link</a></td>
<td align="center">Allow to alter the link being saved in the datastore.</td>
</tr>
<tr>
<td><a href="#delete_link">delete_link</a></td>
<td align="center">Allow to do an action before a link is deleted from 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>$data['<placeholder>']</code> array.</p>
<p>List of placeholders:</p>
<ul>
<li><code>buttons_toolbar</code>: after the list of buttons in the header.</li>
</ul>
<p><img alt="buttons_toolbar_example" src="http://i.imgur.com/ssJUOrt.png" /></p>
<ul>
<li><code>fields_toolbar</code>: after search fields in the header.</li>
</ul>
<blockquote>
<p>Note: This will only be called in linklist.</p>
</blockquote>
<p><img alt="fields_toolbar_example" src="http://i.imgur.com/3GMifI2.png" /></p>
<h4 id="render_includes">render_includes</h4>
<p>Triggered on every page.</p>
<p>Allow plugin to include their own CSS files.</p>
<h5 id="data_1">Data</h5>
<p><code>$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>$data['<placeholder>']</code> array.</p>
<p>List of placeholders:</p>
<ul>
<li><code>css_files</code>: called after loading default CSS.</li>
</ul>
<blockquote>
<p>Note: only add the path of the CSS file. E.g: <code>plugins/demo_plugin/custom_demo.css</code>.</p>
</blockquote>
<h4 id="render_footer">render_footer</h4>
<p>Triggered on every page.</p>
<p>Allow plugin to add content in page footer and include their own JS files.</p>
<h5 id="data_2">Data</h5>
<p><code>$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>$data['<placeholder>']</code> array.</p>
<p>List of placeholders:</p>
<ul>
<li><code>text</code>: called after the end of the footer text.</li>
<li><code>endofpage</code>: called at the end of the page.</li>
</ul>
<p><img alt="text_example" src="http://i.imgur.com/L5S2YEH.png" /></p>
<ul>
<li><code>js_files</code>: called at the end of the page, to include custom JS scripts.</li>
</ul>
<blockquote>
<p>Note: only add the path of the JS file. E.g: <code>plugins/demo_plugin/custom_demo.js</code>.</p>
</blockquote>
<h4 id="render_linklist">render_linklist</h4>
<p>Triggered when <code>linklist</code> is displayed (list of links, permalink, search, tag filtered, etc.).</p>
<p>It allows to add content at the begining and end of the page, after every link displayed and to alter link data.</p>
<h5 id="data_3">Data</h5>
<p><code>$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>$data['<placeholder>']</code> array.</p>
<p>List of placeholders:</p>
<ul>
<li><code>action_plugin</code>: next to the button "private only" at the top and bottom of the page.</li>
</ul>
<p><img alt="action_plugin_example" src="http://i.imgur.com/Q12PWg0.png" /></p>
<ul>
<li><code>link_plugin</code>: for every link, between permalink and link URL.</li>
</ul>
<p><img alt="link_plugin_example" src="http://i.imgur.com/3oDPhWx.png" /></p>
<ul>
<li><code>plugin_start_zone</code>: before displaying the template content.</li>
</ul>
<p><img alt="plugin_start_zone_example" src="http://i.imgur.com/OVBkGy3.png" /></p>
<ul>
<li><code>plugin_end_zone</code>: after displaying the template content.</li>
</ul>
<p><img alt="plugin_end_zone_example" src="http://i.imgur.com/6IoRuop.png" /></p>
<h4 id="render_editlink">render_editlink</h4>
<p>Triggered when the link edition form is displayed.</p>
<p>Allow to add fields in the form, or display elements.</p>
<h5 id="data_4">Data</h5>
<p><code>$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>$data['<placeholder>']</code> array.</p>
<p>List of placeholders:</p>
<ul>
<li><code>edit_link_plugin</code>: after tags field.</li>
</ul>
<p><img alt="edit_link_plugin_example" src="http://i.imgur.com/5u17Ens.png" /></p>
<h4 id="render_tools">render_tools</h4>
<p>Triggered when the "tools" page is displayed.</p>
<p>Allow to add content at the end of the page.</p>
<h5 id="data_5">Data</h5>
<p><code>$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>$data['<placeholder>']</code> array.</p>
<p>List of placeholders:</p>
<ul>
<li><code>tools_plugin</code>: at the end of the page.</li>
</ul>
<p><img alt="tools_plugin_example" src="http://i.imgur.com/Bqhu9oQ.png" /></p>
<h4 id="render_picwall">render_picwall</h4>
<p>Triggered when picwall is displayed.</p>
<p>Allow to add content at the top and bottom of the page.</p>
<h5 id="data_6">Data</h5>
<p><code>$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>$data['<placeholder>']</code> array.</p>
<p>List of placeholders:</p>
<ul>
<li>
<p><code>plugin_start_zone</code>: before displaying the template content.</p>
</li>
<li>
<p><code>plugin_end_zone</code>: after displaying the template content.</p>
</li>
</ul>
<p><img alt="plugin_start_end_zone_example" src="http://i.imgur.com/tVTQFER.png" /></p>
<h4 id="render_tagcloud">render_tagcloud</h4>
<p>Triggered when tagcloud is displayed.</p>
<p>Allow to add content at the top and bottom of the page.</p>
<h5 id="data_7">Data</h5>
<p><code>$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>$data['<placeholder>']</code> array.</p>
<p>List of placeholders:</p>
<ul>
<li>
<p><code>plugin_start_zone</code>: before displaying the template content.</p>
</li>
<li>
<p><code>plugin_end_zone</code>: after displaying the template content.</p>
</li>
</ul>
<p>For each tag, the following placeholder can be used:</p>
<ul>
<li><code>tag_plugin</code>: after each tag</li>
</ul>
<p><img alt="plugin_start_end_zone_example" src="http://i.imgur.com/vHmyT3a.png" /></p>
<h4 id="render_taglist">render_taglist</h4>
<p>Triggered when taglist is displayed.</p>
<p>Allow to add content at the top and bottom of the page.</p>
<h5 id="data_8">Data</h5>
<p><code>$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.</li>
</ul>
<h5 id="template-placeholders_8">Template placeholders</h5>
<p>Items can be displayed in templates by adding an entry in <code>$data['<placeholder>']</code> array.</p>
<p>List of placeholders:</p>
<ul>
<li>
<p><code>plugin_start_zone</code>: before displaying the template content.</p>
</li>
<li>
<p><code>plugin_end_zone</code>: after displaying the template content.</p>
</li>
</ul>
<p>For each tag, the following placeholder can be used:</p>
<ul>
<li><code>tag_plugin</code>: after each tag</li>
</ul>
<h4 id="render_daily">render_daily</h4>
<p>Triggered when tagcloud is displayed.</p>
<p>Allow to add content at the top and bottom of the page, the bottom of each link and to alter data.</p>
<h5 id="data_9">Data</h5>
<p><code>$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_9">Template placeholders</h5>
<p>Items can be displayed in templates by adding an entry in <code>$data['<placeholder>']</code> array.</p>
<p>List of placeholders:</p>
<ul>
<li><code>link_plugin</code>: used at bottom of each link.</li>
</ul>
<p><img alt="link_plugin_example" src="http://i.imgur.com/hzhMfSZ.png" /></p>
<ul>
<li>
<p><code>plugin_start_zone</code>: before displaying the template content.</p>
</li>
<li>
<p><code>plugin_end_zone</code>: after displaying the template content.</p>
</li>
</ul>
<h4 id="render_feed">render_feed</h4>
<p>Triggered when the ATOM or RSS feed is displayed.</p>
<p>Allow to add tags in the feed, either in the header or for each items. Items (links) can also be altered before being rendered.</p>
<h5 id="data_10">Data</h5>
<p><code>$data</code> is an array containing:</p>
<ul>
<li><code>_LOGGEDIN_</code>: true if user is logged in, false otherwise.</li>
<li><code>_PAGE_</code>: containing either <code>rss</code> or <code>atom</code>.</li>
<li>All templates data, including links.</li>
</ul>
<h5 id="template-placeholders_10">Template placeholders</h5>
<p>Tags can be added in feeds by adding an entry in <code>$data['<placeholder>']</code> array.</p>
<p>List of placeholders:</p>
<ul>
<li><code>feed_plugins_header</code>: used as a header tag in the feed.</li>
</ul>
<p>For each links:</p>
<ul>
<li><code>feed_plugins</code>: additional tag for every link entry.</li>
</ul>
<h4 id="save_link">save_link</h4>
<p>Triggered when a link is save (new link or edit).</p>
<p>Allow to alter the link being saved in the datastore.</p>
<h5 id="data_11">Data</h5>
<p><code>$data</code> is an array containing the link being saved:</p>
<ul>
<li>id</li>
<li>title</li>
<li>url</li>
<li>shorturl</li>
<li>description</li>
<li>private</li>
<li>tags</li>
<li>created</li>
<li>updated</li>
</ul>
<h4 id="delete_link">delete_link</h4>
<p>Triggered when a link is deleted.</p>
<p>Allow to execute any action before the link is actually removed from the datastore</p>
<h5 id="data_12">Data</h5>
<p><code>$data</code> is an array containing the link being saved:</p>
<ul>
<li>id</li>
<li>title</li>
<li>url</li>
<li>shorturl</li>
<li>description</li>
<li>private</li>
<li>tags</li>
<li>created</li>
<li>updated</li>
</ul>
<h2 id="guide-for-template-designer">Guide for template designer</h2>
<h3 id="plugin-administration">Plugin administration</h3>
<p>Your theme must include a plugin administration page: <code>pluginsadmin.html</code>.</p>
<blockquote>
<p>Note: repo's template link needs to be added when the PR is merged.</p>
</blockquote>
<p>Use the default one as an example.</p>
<p>Aside from classic RainTPL loops, plugins order is handle by JavaScript. You can just include <code>plugin_admin.js</code>, only if:</p>
<ul>
<li>you're using a table.</li>
<li>you call orderUp() and orderUp() onclick on arrows.</li>
<li>you add data-line and data-order to your rows.</li>
</ul>
<p>Otherwise, you can use your own JS as long as this field is send by the form:</p>
<p><input type="hidden" name="order_{$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>{$value}</li>
{/loop}
</ul>
{/if}
</code></pre>
<p><strong>includes.html</strong></p>
<p>At the end of the file:</p>
<pre><code class="html">{loop="$plugins_includes.css_files"}
<link type="text/css" rel="stylesheet" href="{$value}#"/>
{/loop}
</code></pre>
<p><strong>page.footer.html</strong></p>
<p>At the end of your footer notes:</p>
<pre><code class="html">{loop="$plugins_footer.text"}
{$value}
{/loop}
</code></pre>
<p>At the end of file:</p>
<pre><code class="html">{loop="$plugins_footer.js_files"}
<script src="{$value}#"></script>
{/loop}
</code></pre>
<p><strong>linklist.html</strong></p>
<p>After search fields:</p>
<pre><code class="html">{loop="$plugins_header.fields_toolbar"}
{$value}
{/loop}
</code></pre>
<p>Before displaying the link list (after paging):</p>
<pre><code class="html">{loop="$plugin_start_zone"}
{$value}
{/loop}
</code></pre>
<p>For every links (icons):</p>
<pre><code class="html">{loop="$value.link_plugin"}
<span>{$value}</span>
{/loop}
</code></pre>
<p>Before end paging:</p>
<pre><code class="html">{loop="$plugin_end_zone"}
{$value}
{/loop}
</code></pre>
<p><strong>linklist.paging.html</strong></p>
<p>After the "private only" icon:</p>
<pre><code class="html">{loop="$action_plugin"}
{$value}
{/loop}
</code></pre>
<p><strong>editlink.html</strong></p>
<p>After tags field:</p>
<pre><code class="html">{loop="$edit_link_plugin"}
{$value}
{/loop}
</code></pre>
<p><strong>tools.html</strong></p>
<p>After the last tool:</p>
<pre><code class="html">{loop="$tools_plugin"}
{$value}
{/loop}
</code></pre>
<p><strong>picwall.html</strong></p>
<p>Top:</p>
<pre><code class="html"><div id="plugin_zone_start_picwall" class="plugin_zone">
{loop="$plugin_start_zone"}
{$value}
{/loop}
</div>
</code></pre>
<p>Bottom:</p>
<pre><code class="html"><div id="plugin_zone_end_picwall" class="plugin_zone">
{loop="$plugin_end_zone"}
{$value}
{/loop}
</div>
</code></pre>
<p><strong>tagcloud.html</strong></p>
<p>Top:</p>
<pre><code class="html"> <div id="plugin_zone_start_tagcloud" class="plugin_zone">
{loop="$plugin_start_zone"}
{$value}
{/loop}
</div>
</code></pre>
<p>Bottom:</p>
<pre><code class="html"> <div id="plugin_zone_end_tagcloud" class="plugin_zone">
{loop="$plugin_end_zone"}
{$value}
{/loop}
</div>
</code></pre>
<p><strong>daily.html</strong></p>
<p>Top:</p>
<pre><code class="html"><div id="plugin_zone_start_picwall" class="plugin_zone">
{loop="$plugin_start_zone"}
{$value}
{/loop}
</div>
</code></pre>
<p>After every link:</p>
<pre><code class="html"><div class="dailyEntryFooter">
{loop="$link.link_plugin"}
{$value}
{/loop}
</div>
</code></pre>
<p>Bottom:</p>
<pre><code class="html"><div id="plugin_zone_end_picwall" class="plugin_zone">
{loop="$plugin_end_zone"}
{$value}
{/loop}
</div>
</code></pre>
<p><strong>feed.atom.xml</strong> and <strong>feed.rss.xml</strong>:</p>
<p>In headers tags section:</p>
<pre><code class="xml">{loop="$feed_plugins_header"}
{$value}
{/loop}
</code></pre>
<p>After each entry:</p>
<pre><code class="xml">{loop="$value.feed_plugins"}
{$value}
{/loop}
</code></pre>
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