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authorEvan Prodromou <evan@status.net>2010-01-03 11:02:36 -1000
committerEvan Prodromou <evan@status.net>2010-01-03 11:02:36 -1000
commit1348c6e81995d9cae5ad4a4803723750ecb462c2 (patch)
tree38eebe50fe9c3a71294edee7bccea105a8bd3a6d /plugins/Sample
parentec380887f71a1eadc75bad0289f9a0dbee7f2913 (diff)
Expand SamplePlugin to show other best practices
I modified the SamplePlugin to show how to do some real processing, adding a data class and an action class and modifying the main menu to link to the new action. I added documentation comments to all the methods and made sure the modules were PHPCS-clean.
Diffstat (limited to 'plugins/Sample')
-rw-r--r--plugins/Sample/User_greeting_count.php169
-rw-r--r--plugins/Sample/hello.php166
2 files changed, 335 insertions, 0 deletions
diff --git a/plugins/Sample/User_greeting_count.php b/plugins/Sample/User_greeting_count.php
new file mode 100644
index 000000000..77fb9afeb
--- /dev/null
+++ b/plugins/Sample/User_greeting_count.php
@@ -0,0 +1,169 @@
+<?php
+/**
+ * Data class for counting greetings
+ *
+ * PHP version 5
+ *
+ * @category Data
+ * @package StatusNet
+ * @author Evan Prodromou <evan@status.net>
+ * @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
+ * @link http://status.net/
+ *
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2009, StatusNet, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+if (!defined('STATUSNET')) {
+ exit(1);
+}
+
+require_once INSTALLDIR . '/classes/Memcached_DataObject.php';
+
+/**
+ * Data class for counting greetings
+ *
+ * We use the DB_DataObject framework for data classes in StatusNet. Each
+ * table maps to a particular data class, making it easier to manipulate
+ * data.
+ *
+ * Data classes should extend Memcached_DataObject, the (slightly misnamed)
+ * extension of DB_DataObject that provides caching, internationalization,
+ * and other bits of good functionality to StatusNet-specific data classes.
+ *
+ * @category Action
+ * @package StatusNet
+ * @author Evan Prodromou <evan@status.net>
+ * @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
+ * @link http://status.net/
+ *
+ * @see DB_DataObject
+ */
+
+class User_greeting_count extends Memcached_DataObject
+{
+ public $__table = 'user_greeting_count'; // table name
+ public $user_id; // int(4) primary_key not_null
+ public $greeting_count; // int(4)
+
+ /**
+ * Get an instance by key
+ *
+ * This is a utility method to get a single instance with a given key value.
+ *
+ * @param string $k Key to use to lookup (usually 'user_id' for this class)
+ * @param mixed $v Value to lookup
+ *
+ * @return User_greeting_count object found, or null for no hits
+ *
+ */
+
+ function staticGet($k, $v=null)
+ {
+ return Memcached_DataObject::staticGet('User_greeting_count', $k, $v);
+ }
+
+ /**
+ * return table definition for DB_DataObject
+ *
+ * DB_DataObject needs to know something about the table to manipulate
+ * instances. This method provides all the DB_DataObject needs to know.
+ *
+ * @return array array of column definitions
+ */
+
+ function table()
+ {
+ return array('user_id' => DB_DATAOBJECT_INT + DB_DATAOBJECT_NOTNULL,
+ 'greeting_count' => DB_DATAOBJECT_INT);
+ }
+
+ /**
+ * return key definitions for DB_DataObject
+ *
+ * DB_DataObject needs to know about keys that the table has; this function
+ * defines them.
+ *
+ * @return array key definitions
+ */
+
+ function keys()
+ {
+ return array('user_id' => 'K');
+ }
+
+ /**
+ * Magic formula for non-autoincrementing integer primary keys
+ *
+ * If a table has a single integer column as its primary key, DB_DataObject
+ * assumes that the column is auto-incrementing and makes a sequence table
+ * to do this incrementation. Since we don't need this for our class, we
+ * overload this method and return the magic formula that DB_DataObject needs.
+ *
+ * @return array magic three-false array that stops auto-incrementing.
+ */
+
+ function sequenceKey()
+ {
+ return array(false, false, false);
+ }
+
+ /**
+ * Increment a user's greeting count and return instance
+ *
+ * This method handles the ins and outs of creating a new greeting_count for a
+ * user or fetching the existing greeting count and incrementing its value.
+ *
+ * @param integer $user_id ID of the user to get a count for
+ *
+ * @return User_greeting_count instance for this user, with count already incremented.
+ */
+
+ static function inc($user_id)
+ {
+ $gc = User_greeting_count::staticGet('user_id', $user_id);
+
+ if (empty($gc)) {
+
+ $gc = new User_greeting_count();
+
+ $gc->user_id = $user_id;
+ $gc->greeting_count = 1;
+
+ $result = $gc->insert();
+
+ if (!$result) {
+ throw Exception(sprintf(_m("Could not save new greeting count for %d"),
+ $user_id));
+ }
+
+ } else {
+
+ $orig = clone($gc);
+
+ $gc->greeting_count++;
+
+ $result = $gc->update($orig);
+
+ if (!$result) {
+ throw Exception(sprintf(_m("Could not increment greeting count for %d"),
+ $user_id));
+ }
+ }
+
+ return $gc;
+ }
+}
diff --git a/plugins/Sample/hello.php b/plugins/Sample/hello.php
new file mode 100644
index 000000000..0cfd8a1c3
--- /dev/null
+++ b/plugins/Sample/hello.php
@@ -0,0 +1,166 @@
+<?php
+/**
+ * Give a warm greeting to our friendly user
+ *
+ * PHP version 5
+ *
+ * @category Sample
+ * @package StatusNet
+ * @author Evan Prodromou <evan@status.net>
+ * @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
+ * @link http://status.net/
+ *
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2009, StatusNet, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+if (!defined('STATUSNET')) {
+ exit(1);
+}
+
+/**
+ * Give a warm greeting to our friendly user
+ *
+ * This sample action shows some basic ways of doing output in an action
+ * class.
+ *
+ * Action classes have several output methods that they override from
+ * the parent class.
+ *
+ * @category Sample
+ * @package StatusNet
+ * @author Evan Prodromou <evan@status.net>
+ * @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
+ * @link http://status.net/
+ */
+
+class HelloAction extends Action
+{
+ var $user = null;
+ var $gc = null;
+
+ /**
+ * Take arguments for running
+ *
+ * This method is called first, and it lets the action class get
+ * all its arguments and validate them. It's also the time
+ * to fetch any relevant data from the database.
+ *
+ * Action classes should run parent::prepare($args) as the first
+ * line of this method to make sure the default argument-processing
+ * happens.
+ *
+ * @param array $args $_REQUEST args
+ *
+ * @return boolean success flag
+ */
+
+ function prepare($args)
+ {
+ parent::prepare($args);
+
+ $this->user = common_current_user();
+
+ if (!empty($this->user)) {
+ $this->gc = User_greeting_count::inc($this->user->id);
+ }
+
+ return true;
+ }
+
+ /**
+ * Handle request
+ *
+ * This is the main method for handling a request. Note that
+ * most preparation should be done in the prepare() method;
+ * by the time handle() is called the action should be
+ * more or less ready to go.
+ *
+ * @param array $args $_REQUEST args; handled in prepare()
+ *
+ * @return void
+ */
+
+ function handle($args)
+ {
+ parent::handle($args);
+
+ $this->showPage();
+ }
+
+ /**
+ * Title of this page
+ *
+ * Override this method to show a custom title.
+ *
+ * @return string Title of the page
+ */
+
+ function title()
+ {
+ if (empty($this->user)) {
+ return _m('Hello');
+ } else {
+ return sprintf(_m('Hello, %s'), $this->user->nickname);
+ }
+ }
+
+ /**
+ * show content in the content area
+ *
+ * The default StatusNet page has a lot of decorations: menus,
+ * logos, tabs, all that jazz. This method is used to show
+ * content in the content area of the page; it's the main
+ * thing you want to overload.
+ *
+ * @return void
+ */
+
+ function showContent()
+ {
+ if (empty($this->user)) {
+ $this->element('p', array('class' => 'greeting'),
+ _m('Hello, stranger!'));
+ } else {
+ $this->element('p', array('class' => 'greeting'),
+ sprintf(_m('Hello, %s'), $this->user->nickname));
+ $this->element('p', array('class' => 'greeting_count'),
+ sprintf(_m('I have greeted you %d time(s).'),
+ $this->gc->greeting_count));
+ }
+ }
+
+ /**
+ * Return true if read only.
+ *
+ * Some actions only read from the database; others read and write.
+ * The simple database load-balancer built into StatusNet will
+ * direct read-only actions to database mirrors (if they are configured),
+ * and read-write actions to the master database.
+ *
+ * This defaults to false to avoid data integrity issues, but you
+ * should make sure to overload it for performance gains.
+ *
+ * @param array $args other arguments, if RO/RW status depends on them.
+ *
+ * @return boolean is read only action?
+ */
+
+ function isReadOnly($args)
+ {
+ return false;
+ }
+}