silverstripe-blog/code/BlogTree.php

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<?php
/**
* @package blog
*/
/**
* Blog tree allows a tree of Blog Holders. Viewing branch nodes shows all blog entries from all blog holder children
*/
class BlogTree extends Page {
static $db = array(
'Name' => 'Varchar',
'InheritSideBar' => 'Boolean',
'LandingPageFreshness' => 'Varchar',
);
static $defaults = array(
'InheritSideBar' => True
);
static $has_one = array(
"SideBar" => "WidgetArea",
);
static $allowed_children = array(
'BlogTree', 'BlogHolder'
);
/*
* Finds the BlogTree object most related to the current page.
* - If this page is a BlogTree, use that
* - If this page is a BlogEntry, use the parent Holder
* - Otherwise, try and find a 'top-level' BlogTree
*/
static function current() {
$page = Director::currentPage();
// If we _are_ a BlogTree, use us
if ($page instanceof BlogTree) return $page;
// Or, if we a a BlogEntry underneath a BlogTree, use our parent
if ($page->is_a("BlogEntry")) {
$parent = $page->getParent();
if ($parent instanceof BlogTree) return $parent;
}
// Try to find a top-level BlogTree
if(defined('Database::USE_ANSI_SQL')) {
$top = DataObject::get_one('BlogTree', "\"ParentID\" = '0'");
} else {
$top = DataObject::get_one('BlogTree', 'ParentID = 0');
}
if ($top) return $top;
// Try to find any BlogTree that is not inside another BlogTree
foreach(DataObject::get('BlogTree') as $tree) {
if (!($tree->getParent() instanceof BlogTree)) return $tree;
}
// This shouldn't be possible, but assuming the above fails, just return anything you can get
return DataObject::get_one('BlogTree');
}
/* ----------- ACCESSOR OVERRIDES -------------- */
public function getLandingPageFreshness() {
$freshness = $this->getField('LandingPageFreshness');
// If we want to inherit freshness, try that first
if ($freshness = "INHERIT" && $this->getParent()) $freshness = $this->getParent()->LandingPageFreshness;
// If we don't have a parent, or the inherited result was still inherit, use default
if ($freshness = "INHERIT") $freshness = '';
return $freshness;
}
function SideBar() {
if ($this->InheritSideBar && $this->getParent()) {
if (method_exists($this->getParent(), 'SideBar')) return $this->getParent()->SideBar();
}
return DataObject::get_by_id('WidgetArea', $this->SideBarID);
// @todo: This segfaults - investigate why then fix: return $this->getComponent('SideBar');
}
/* ----------- CMS CONTROL -------------- */
function getCMSFields() {
$fields = parent::getCMSFields();
$fields->addFieldToTab("Root.Content.Main", new TextField("Name", "Name of blog"));
$fields->addFieldToTab('Root.Content.Main', new DropdownField('LandingPageFreshness', 'When you first open the blog, how many entries should I show', array(
"" => "All entries",
"1 MONTH" => "Last month's entries",
"2 MONTH" => "Last 2 months' entries",
"3 MONTH" => "Last 3 months' entries",
"4 MONTH" => "Last 4 months' entries",
"5 MONTH" => "Last 5 months' entries",
"6 MONTH" => "Last 6 months' entries",
"7 MONTH" => "Last 7 months' entries",
"8 MONTH" => "Last 8 months' entries",
"9 MONTH" => "Last 9 months' entries",
"10 MONTH" => "Last 10 months' entries",
"11 MONTH" => "Last 11 months' entries",
"12 MONTH" => "Last year's entries",
"INHERIT" => "Take value from parent Blog Tree"
)));
$fields->addFieldToTab("Root.Content.Widgets", new CheckboxField("InheritSideBar", 'Inherit Sidebar From Parent'));
$fields->addFieldToTab("Root.Content.Widgets", new WidgetAreaEditor("SideBar"));
return $fields;
}
/* ----------- New accessors -------------- */
public function loadDescendantBlogHolderIDListInto(&$idList) {
if ($children = $this->AllChildren()) {
foreach($children as $child) {
if (in_array($child->ID, $idList)) continue;
if ($child instanceof BlogHolder) $idList[] = $child->ID;
else $child->loadDescendantBlogHolderIDListInto($idList);
}
}
}
// Build a list of all IDs for BlogHolders that are children of us
public function BlogHolderIDs() {
$holderIDs = array();
$this->loadDescendantBlogHolderIDListInto($holderIDs);
return $holderIDs;
}
/**
* Get entries in this blog.
* @param string limit A clause to insert into the limit clause.
* @param string tag Only get blog entries with this tag
* @param string date Only get blog entries on this date - either a year, or a year-month eg '2008' or '2008-02'
* @param callback retrieveCallback A function to call with pagetype, filter and limit for custom blog sorting or filtering
* @return DataObjectSet
*/
public function Entries($limit = '', $tag = '', $date = '', $retrieveCallback = null) {
$tagCheck = '';
$dateCheck = '';
if ($tag) {
$SQL_tag = Convert::raw2sql($tag);
if(defined('Database::USE_ANSI_SQL')) {
$tagCheck = "AND \"BlogEntry\".\"Tags\" LIKE '%$SQL_tag%'";
} else {
$tagCheck = "AND `BlogEntry`.Tags LIKE '%$SQL_tag%'";
}
}
if ($date) {
if(strpos($date, '-')) {
$year = (int) substr($date, 0, strpos($date, '-'));
$month = (int) substr($date, strpos($date, '-') + 1);
if($year && $month) {
if(defined('Database::USE_ANSI_SQL')) {
$dateCheck = "AND MONTH(\"BlogEntry\".\"Date\") = '$month' AND YEAR(\"BlogEntry\".\"Date\") = '$year'";
} else {
$dateCheck = "AND MONTH(`BlogEntry`.Date) = $month AND YEAR(`BlogEntry`.Date) = $year";
}
}
} else {
$year = (int) $date;
if($year) {
if(defined('Database::USE_ANSI_SQL')) {
$dateCheck = "AND YEAR(\"BlogEntry\".\"Date\") = '$year'";
} else {
$dateCheck = "AND YEAR(`BlogEntry`.Date) = $year";
}
}
}
}
elseif ($this->LandingPageFreshness) {
if(defined('Database::USE_ANSI_SQL')) {
$dateCheck = "AND \"BlogEntry\".\"Date\" > NOW() - INTERVAL " . $this->LandingPageFreshness;
} else {
$dateCheck = "AND `BlogEntry`.Date > NOW() - INTERVAL " . $this->LandingPageFreshness;
}
}
// Build a list of all IDs for BlogHolders that are children of us
$holderIDs = $this->BlogHolderIDs();
// If no BlogHolders, no BlogEntries. So return false
if (empty($holderIDs)) return false;
// Otherwise, do the actual query
if(defined('Database::USE_ANSI_SQL')) {
$where = '"ParentID" IN (' . implode(',', $holderIDs) . ") $tagCheck $dateCheck";
} else {
$where = 'ParentID IN (' . implode(',', $holderIDs) . ") $tagCheck $dateCheck";
}
if(defined('Database::USE_ANSI_SQL')) {
$order = '"BlogEntry"."Date" DESC';
} else {
$order = '`BlogEntry`.`Date` DESC';
}
// By specifying a callback, you can alter the SQL, or sort on something other than date.
if ($retrieveCallback) return call_user_func($retrieveCallback, 'BlogEntry', $where, $limit);
else return DataObject::get('BlogEntry', $where, $order, '', $limit);
}
}
class BlogURL {
static function tag() {
if (Director::urlParam('Action') == 'tag') return Director::urlParam('ID');
return '';
}
static function date() {
$year = Director::urlParam('Action');
$month = Director::urlParam('ID');
if ($month && is_numeric($month) && $month >= 1 && $month <= 12 && is_numeric($year)) {
return "$year-$month";
}
elseif (is_numeric($year)) {
return $year;
}
return '';
}
}
class BlogTree_Controller extends Page_Controller {
function init() {
parent::init();
// This will create a <link> tag point to the RSS feed
RSSFeed::linkToFeed($this->Link() . "rss", _t('BlogHolder.RSSFEED',"RSS feed of these blogs"));
Requirements::themedCSS("blog");
}
function BlogEntries($limit = 10) {
$start = isset($_GET['start']) ? (int) $_GET['start'] : 0;
return $this->Entries("$start,$limit", BlogURL::tag(), BlogURL::date());
}
/*
* @todo: It doesn't look like these are used. Remove if no-one complains - Hamish
/**
* Gets the archived blogs for a particular month or year, in the format /year/month/ eg: /2008/10/
* /
function showarchive() {
$month = addslashes($this->urlParams['ID']);
return array(
"Children" => DataObject::get('SiteTree', "ParentID = $this->ID AND DATE_FORMAT(`BlogEntry`.`Date`, '%Y-%M') = '$month'"),
);
}
function ArchiveMonths() {
$months = DB::query("SELECT DISTINCT DATE_FORMAT(`BlogEntry`.`Date`, '%M') AS `Month`, DATE_FORMAT(`BlogEntry`.`Date`, '%Y') AS `Year` FROM `BlogEntry` ORDER BY `BlogEntry`.`Date` DESC");
$output = new DataObjectSet();
foreach($months as $month) {
$month['Link'] = $this->Link() . "showarchive/$month[Year]-$month[Month]";
$output->push(new ArrayData($month));
}
return $output;
}
function tag() {
if (Director::urlParam('Action') == 'tag') {
return array(
'Tag' => Convert::raw2xml(Director::urlParam('ID'))
);
}
return array();
}
*/
/**
* Get the rss feed for this blog holder's entries
*/
function rss() {
global $project_name;
$blogName = $this->Name;
$altBlogName = $project_name . ' blog';
$entries = $this->Entries(20);
if($entries) {
$rss = new RSSFeed($entries, $this->Link(), ($blogName ? $blogName : $altBlogName), "", "Title", "ParsedContent");
$rss->outputToBrowser();
}
}
function defaultAction($action) {
// Protection against infinite loops when an RSS widget pointing to this page is added to this page
if(stristr($_SERVER['HTTP_USER_AGENT'], 'SimplePie')) return $this->rss();
return parent::defaultAction($action);
}
}