silverstripe-blog/code/BlogTree.php

316 lines
9.6 KiB
PHP

<?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 {
// Default number of blog entries to show
static $default_entries_limit = 10;
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
*
* @param $page allows you to force a specific page, otherwise,
* uses current
*/
static function current($page = null) {
if (!$page) {
$controller = Controller::curr();
if($controller) $page = $controller->data();
}
// If we _are_ a BlogTree, use us
if ($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
$top = DataObject::get_one('BlogTree', "\"ParentID\" = '0'");
if($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 $this->getParent()->SideBar();
}
if($this->SideBarID){
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[] = $child->ID;
} elseif($child instanceof BlogTree) {
$child->loadDescendantBlogHolderIDListInto($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
* @param string $where
* @return DataObjectSet
*/
public function Entries($limit = '', $tag = '', $date = '', $retrieveCallback = null, $filter = '') {
$tagCheck = '';
$dateCheck = '';
if($tag) {
$SQL_tag = Convert::raw2sql($tag);
$tagCheck = "AND \"BlogEntry\".\"Tags\" LIKE '%$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(method_exists(DB::getConn(), 'formattedDatetimeClause')) {
$db_date=DB::getConn()->formattedDatetimeClause('"BlogEntry"."Date"', '%m');
$dateCheck = "AND CAST($db_date AS " . DB::getConn()->dbDataType('unsigned integer') . ") = $month AND " . DB::getConn()->formattedDatetimeClause('"BlogEntry"."Date"', '%Y') . " = '$year'";
} else {
$dateCheck = "AND MONTH(\"BlogEntry\".\"Date\") = '$month' AND YEAR(\"BlogEntry\".\"Date\") = '$year'";
}
}
} else {
$year = (int) $date;
if($year) {
if(method_exists(DB::getConn(), 'formattedDatetimeClause')) {
$dateCheck = "AND " . DB::getConn()->formattedDatetimeClause('"BlogEntry"."Date"', '%Y') . " = '$year'";
} else {
$dateCheck = "AND YEAR(\"BlogEntry\".\"Date\") = '$year'";
}
}
}
}
// 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($filter) $filter .= ' AND ';
$filter .= '"ParentID" IN (' . implode(',', $holderIDs) . ") $tagCheck $dateCheck";
$order = '"BlogEntry"."Date" DESC';
// By specifying a callback, you can alter the SQL, or sort on something other than date.
if($retrieveCallback) return call_user_func($retrieveCallback, 'BlogEntry', $filter, $limit, $order);
return DataObject::get('BlogEntry', $filter, $order, '', $limit);
}
}
class BlogTree_Controller extends Page_Controller {
static $allowed_actions = array(
'index',
'rss',
);
function init() {
parent::init();
$this->IncludeBlogRSS();
Requirements::themedCSS("blog");
}
function BlogEntries($limit = null) {
if($limit === null) $limit = BlogTree::$default_entries_limit;
// only use freshness if no action is present (might be displaying tags or rss)
if ($this->LandingPageFreshness && !$this->request->param('Action')) {
$filter = "\"BlogEntry\".\"Date\" > NOW() - INTERVAL " . $this->LandingPageFreshness;
} else {
$filter = '';
}
// allow filtering by author field and some blogs have an authorID field which
// may allow filtering by id
if(isset($_GET['author']) && isset($_GET['authorID'])) {
$author = Convert::raw2sql($_GET['author']);
$id = Convert::raw2sql($_GET['authorID']);
$filter .= " \"BlogEntry\".\"Author\" LIKE '". $author . "' OR \"BlogEntry\".\"AuthorID\" = '". $id ."'";
}
else if(isset($_GET['author'])) {
$filter .= " \"BlogEntry\".\"Author\" LIKE '". Convert::raw2sql($_GET['author']) . "'";
}
else if(isset($_GET['authorID'])) {
$filter .= " \"BlogEntry\".\"AuthorID\" = '". Convert::raw2sql($_GET['authorID']). "'";
}
$start = isset($_GET['start']) ? (int) $_GET['start'] : 0;
$date = $this->SelectedDate();
return $this->Entries("$start,$limit", $this->SelectedTag(), ($date) ? $date->Format('Y-m') : '', null, $filter);
}
/**
* This will create a <link> tag point to the RSS feed
*/
function IncludeBlogRSS() {
RSSFeed::linkToFeed($this->Link() . "rss", _t('BlogHolder.RSSFEED',"RSS feed of these blogs"));
}
/**
* 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");
$rss->outputToBrowser();
}
}
/**
* Protection against infinite loops when an RSS widget pointing to this page is added to this page
*/
function defaultAction($action) {
if(stristr($_SERVER['HTTP_USER_AGENT'], 'SimplePie')) return $this->rss();
return parent::defaultAction($action);
}
/**
* Return the currently viewing tag used in the template as $Tag
*
* @return String
*/
function SelectedTag() {
return (Director::urlParam('Action') == 'tag') ? Director::urlParam('ID') : '';
}
/**
* Return the selected date from the blog tree
*
* @return Date
*/
function SelectedDate() {
if(Director::urlParam('Action') == 'date') {
$year = Director::urlParam('ID');
$month = Director::urlParam('OtherID');
if(is_numeric($year) && is_numeric($month) && $month < 13) {
$date = new Date();
$date->setValue($year .'-'. $month);
return $date;
}
}
return false;
}
}