[DOCUMENTATION][DEVELOPERS][PLUGINS] Some updates to Plugins doc
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Plugin Development
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=======================
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==================
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SamplePlugin.php
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-----------------------
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----------------
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Each plugin requires a main class to interact with the GNU social system.
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@ -15,7 +15,7 @@ have pre-defined arguments, based on which event they're handling. A typical
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event handler:
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```php
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function onSomeEvent($paramA, &$paramB)
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public function onSomeEvent($paramA, &$paramB): bool
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{
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if ($paramA == 'jed') {
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throw new Exception(sprintf(_m("Invalid parameter %s"), $paramA));
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@ -26,7 +26,7 @@ function onSomeEvent($paramA, &$paramB)
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```
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Event Handlers
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-----------------------
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--------------
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Event handlers must return a Boolean value.
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@ -41,50 +41,43 @@ If the handler throws an exception, processing will stop, and the exception's
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error will be shown to the user.
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Installation
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------------------
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------------
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To install a plugin (like this one), site admins add the following code to their
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To enable a plugin (like the SamplePlugin), site admins add the following code to their
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config.php file:
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```php
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addPlugin('Sample');
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```
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Plugins must be installed in one of the following directories:
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* local/plugins/{$pluginclass}.php
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* local/plugins/{$name}/{$pluginclass}.php
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* local/{$pluginclass}.php
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* local/{$name}/{$pluginclass}.php
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* plugins/{$pluginclass}.php
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* plugins/{$name}/{$pluginclass}.php
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Third Party Plugins must be installed in `local/plugins/{$name}/{$pluginclass}.php`
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Here, `{$name}` is the name of the plugin, like 'Sample', and `{$pluginclass}`
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is the name of the main class, like 'SamplePlugin'. Plugins that are part of
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the main GNU social distribution go in 'plugins' and third-party or local ones
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go in 'local'.
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Simple plugins can be implemented as a single module. Others are more complex
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and require additional modules; these should use their own directory, like
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Simple plugins can be implemented as a single plugin. Others are more complex
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and require additional plugins; these should use their own directory, like
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'local/plugins/{$name}/'. All files related to the plugin, including images,
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JavaScript, CSS, external libraries or PHP modules should go in the plugin
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JavaScript, CSS, external libraries or PHP plugins should go in the plugin
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directory.
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Plugin Configuration
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------------------
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--------------------
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Plugins are configured using public instance attributes. To set their values,
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site administrators use this syntax:
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```php
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addPlugin('Sample', ('attr1' => 'foo', 'attr2' => 'bar'));
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addPlugin('Sample', ['attr1' => 'foo', 'attr2' => 'bar']);
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```
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The same plugin class can be initialized multiple times with different arguments:
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```php
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addPlugin('EmailNotify', array('sendTo' => 'evan@status.net'));
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addPlugin('EmailNotify', array('sendTo' => 'brionv@status.net'));
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addPlugin('EmailNotify', ['sendTo' => 'evan@status.net']);
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addPlugin('EmailNotify', ['sendTo' => 'brionv@status.net']);
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```
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```php
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@ -96,34 +89,34 @@ class SamplePlugin extends Plugin
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```
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Initialization
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------------------
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--------------
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Plugins overload this method to do any initialization they need, like connecting
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to remote servers or creating paths or so on. @return boolean hook value; true
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to remote servers or creating paths or so on. @return bool hook value; true
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means continue processing, false means stop.
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```php
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function initialize()
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public function initialize(): bool
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{
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return true;
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}
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```
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Clean Up
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------------------
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--------
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Plugins overload this method to do any cleanup they need, like disconnecting from
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remote servers or deleting temp files or so on.
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```php
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function cleanup()
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public function cleanup(): bool
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{
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return true;
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}
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```
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Database schema setup
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------------------
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---------------------
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Plugins can add their own tables to the GNU social database. Plugins should use
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GNU social's schema interface to add or delete tables. The ensureTable() method
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@ -135,25 +128,26 @@ the checkschema.php script is run, greatly improving performance. However, they
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need to remember to run that script after installing or upgrading a plugin!
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```php
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function onCheckSchema()
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public function onCheckSchema(): bool
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{
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$schema = Schema::get();
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// '''For storing user-submitted flags on profiles'''
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$schema->ensureTable('user_greeting_count',
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array(new ColumnDef('user_id', 'integer', null,
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true, 'PRI'),
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new ColumnDef('greeting_count', 'integer')));
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$schema->ensureTable('user_greeting_count',[
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new ColumnDef('user_id', 'integer', null, true, 'PRI'),
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new ColumnDef('greeting_count', 'integer')
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]
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);
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return true;
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}
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```
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Load related modules when needed
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------------------
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Load related plugins when needed
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--------------------------------
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Most non-trivial plugins will require extra modules to do their work. Typically
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Most non-trivial plugins will require extra plugins to do their work. Typically
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these include data classes, action classes, widget classes, or external libraries.
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This method receives a class name and loads the PHP file related to that class.
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@ -166,9 +160,9 @@ in this plugin! So, make sure to return true by default to let other plugins,
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and the core code, get a chance.
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```php
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function onAutoload($cls)
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public function onAutoload($cls): bool
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{
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$dir = dirname(__FILE__);
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$dir = __DIR__;
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switch ($cls)
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{
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@ -185,7 +179,7 @@ function onAutoload($cls)
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```
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Map URLs to actions
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------------------
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-------------------
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This event handler lets the plugin map URLs on the site to actions (and thus an
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action handler class). Note that the action handler class for an action will be
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@ -193,28 +187,28 @@ named 'FoobarAction', where action = 'foobar'. The class must be loaded in the
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onAutoload() method.
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```php
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function onRouterInitialized($m)
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public function onRouterInitialized($m): bool
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{
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$m->connect('main/hello',
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array('action' => 'hello'));
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['action' => 'hello']);
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return true;
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}
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```
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Modify the default menu to link to our custom action
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------------------
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-----------------------------------------------------
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Using event handlers, it's possible to modify the default UI for pages almost
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without limit. In this method, we add a menu item to the default primary menu
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for the interface to link to our action.
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Action Class
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------------------
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------------
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The Action class provides a rich set of events to hook, as well as output methods.
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```php
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function onEndPrimaryNav($action)
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public function onEndPrimaryNav($action): bool
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{
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// '''common_local_url()''' gets the correct URL for the action name we provide
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@ -225,18 +219,20 @@ function onEndPrimaryNav($action)
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public function onPluginVersion(&$versions): bool
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{
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$versions[] = array('name' => 'Sample',
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$versions[] = [
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'name' => 'Sample',
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'version' => GNUSOCIAL_VERSION,
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'author' => 'Brion Vibber, Evan Prodromou',
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'homepage' => 'http://example.org/plugin',
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'rawdescription' =>
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_m('A sample plugin to show basics of development for new hackers.'));
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_m('A sample plugin to show basics of development for new hackers.')
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];
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return true;
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}
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```
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hello.php
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------------------
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---------
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This section is taken directly from the 'hello.php'. ( plugins/Sample/hello.php )
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@ -255,7 +251,7 @@ class HelloAction extends Action
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```
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Take arguments for running
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------------------
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--------------------------
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This method is called first, and it lets the action class get all its arguments
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and validate them. It's also the time to fetch any relevant data from the database.
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@ -264,7 +260,7 @@ Action classes should run parent::prepare(array $args = []) as the first line
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of this method to make sure the default argument-processing happens.
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```php
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function prepare(array $args = [])
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public function prepare(array $args = []): bool
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{
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parent::prepare($args);
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@ -279,14 +275,14 @@ function prepare(array $args = [])
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```
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Handle request
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------------------
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--------------
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This is the main method for handling a request. Note that most preparation
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should be done in the prepare() method; by the time handle() is called the
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action should be more or less ready to go.
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```php
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function handle()
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public function handle(): void
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{
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parent::handle();
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Override this method to show a custom title.
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```php
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function title()
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public function title(): string
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{
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if (empty($this->user)) {
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return _m('Hello');
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```
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Show content in the content area
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------------------
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--------------------------------
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The default GNU social page has a lot of decorations: menus, logos, tabs, all
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that jazz. This method is used to show content in the content area of the
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@ -319,15 +315,15 @@ page; it's the main thing you want to overload. This method also demonstrates
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use of a plural localized string.
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```php
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function showContent()
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public function showContent(): void
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{
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if (empty($this->user)) {
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$this->element('p', array('class' => 'greeting'),
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$this->element('p', ['class' => 'greeting'],
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_m('Hello, stranger!'));
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} else {
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$this->element('p', array('class' => 'greeting'),
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$this->element('p', ['class' => 'greeting'],
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sprintf(_m('Hello, %s'), $this->user->nickname));
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$this->element('p', array('class' => 'greeting_count'),
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$this->element('p', ['class' => 'greeting_count'],
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sprintf(_m('I have greeted you %d time.',
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'I have greeted you %d times.',
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$this->gc->greeting_count),
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```
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Return true if read only.
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------------------
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-------------------------
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Some actions only read from the database; others read and write. The simple
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database load-balancer built into GNU social will direct read-only actions to
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to overload it for performance gains.
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```php
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function isReadOnly($args)
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public function isReadOnly($args): bool
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{
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return false;
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}
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```
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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/**
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* StatusNet, the distributed open-source microblogging tool
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*
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* Module to add additional awesomenss to StatusNet
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*
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* PHP version 5
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*
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* LICENCE: This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category Module
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* @package StatusNet
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* @author Jeroen De Dauw <jeroendedauw@gmail.com>
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
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*/
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defined('GNUSOCIAL') || die();
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/**
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* Fun sample plugin: tweaks input data and adds a 'Cornify' widget to sidebar.
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*
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* @category Module
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* @category Plugin
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* @package GNUsocial
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* @author Jeroen De Dauw <jeroendedauw@gmail.com>
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* @copyright 2019 Free Software Foundation, Inc http://www.fsf.org
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@ -63,7 +37,7 @@ class AwesomenessPlugin extends Plugin
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'version' => self::PLUGIN_VERSION,
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'author' => 'Jeroen De Dauw',
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'homepage' => 'https://git.gnu.io/gnu/gnu-social/tree/master/plugins/Awesomeness',
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// TRANS: Module description for a sample plugin.
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// TRANS: Plugin description for a sample plugin.
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'rawdescription' => _m('The Awesomeness plugin adds additional awesomeness ' .
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'to a GNU social installation.')
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];
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