silverstripe-blog/model/Blog.php

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<?php
/**
* Blog Holder
*
* @package silverstripe
* @subpackage blog
*
* @author Michael String <github@michaelstrong.co.uk>
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**/
class Blog extends Page {
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private static $db = array(
"PostsPerPage" => "Int",
);
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private static $has_many = array(
"Tags" => "BlogTag",
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"Categories" => "BlogCategory",
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);
private static $allowed_children = array(
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"BlogPost",
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);
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private static $extensions = array(
"BlogFilter",
);
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private static $defaults = array(
"ProvideComments" => false,
);
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public function getCMSFields() {
$fields = parent::getCMSFields();
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$posts = $this->getBlogPosts();
$excluded = $this->getExcludedSiteTreeClassNames();
if(!empty($excluded)) {
$posts = $posts->filter("ClassName", $excluded);
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$gridField = new GridField(
"BlogPost",
_t("Blog.BlogPosts", "Blog Posts"),
$posts,
GridFieldConfig_BlogPost::create()
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);
$fields->addFieldToTab("Root.BlogPosts", $gridField);
}
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// Create categories and tag config
$config = GridFieldConfig_RecordEditor::create();
$config->removeComponentsByType("GridFieldAddNewButton");
$config->addComponent(new GridFieldAddByDBField("buttons-before-left"));
$categories = GridField::create(
"Categories",
_t("Blog.Categories", "Categories"),
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$this->Categories(),
$config
);
$tags = GridField::create(
"Tags",
_t("Blog.Tags", "Tags"),
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$this->Tags(),
$config
);
$fields->addFieldsToTab("Root.BlogOptions", array(
$categories,
$tags
));
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return $fields;
}
public function getSettingsFields() {
$fields = parent::getSettingsFields();
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$fields->addFieldToTab("Root.Settings",
NumericField::create("PostsPerPage", _t("Blog.PostsPerPage", "Posts Per Page"))
);
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return $fields;
}
/**
* Loops through subclasses of BlogPost and checks whether they have been configured
* to be hidden. If so, then they will be excluded from the SiteTree.
*
* @return array
**/
public function getExcludedSiteTreeClassNames() {
$classes = array();
$tmpClasses = $this->allowedChildren();
foreach($tmpClasses as $class) {
if(!Config::inst()->get($class, "show_in_sitetree")) {
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$classes[$class] = $class;
}
}
return $classes;
}
/**
* Return blogs posts
*
* @return DataList of BlogPost objects
**/
public function getBlogPosts() {
$blogPosts = BlogPost::get()->filter("ParentID", $this->ID);
//Allow decorators to manipulate list
$this->extend('updateGetBlogPosts', $blogPosts);
return $blogPosts;
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}
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/**
* Returns blogs posts for a given date period.
*
* @param $year int
* @param $month int
* @param $dat int
*
* @return DataList
**/
public function getArchivedBlogPosts($year, $month = null, $day = null) {
$query = $this->getBlogPosts()->dataQuery();
$stage = $query->getQueryParam("Versioned.stage");
if($stage) $stage = '_' . Convert::raw2sql($stage);
$query->innerJoin("BlogPost", "`SiteTree" . $stage . "`.`ID` = `BlogPost" . $stage . "`.`ID`");
$query->where("YEAR(PublishDate) = '" . Convert::raw2sql($year) . "'");
if($month) {
$query->where("MONTH(PublishDate) = '" . Convert::raw2sql($month) . "'");
if($day) {
$query->where("DAY(PublishDate) = '" . Convert::raw2sql($day) . "'");
}
}
return $this->getBlogPosts()->setDataQuery($query);
}
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}
/**
* Blog Controller
*
* @package silverstripe
* @subpackage blog
*
* @author Michael String <github@michaelstrong.co.uk>
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**/
class Blog_Controller extends Page_Controller {
private static $allowed_actions = array(
'archive',
'tag',
'category',
'rss',
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);
private static $url_handlers = array(
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'tag/$Tag!' => 'tag',
'category/$Category!' => 'category',
'archive/$Year!/$Month/$Day' => 'archive',
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);
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/**
* The current Blog Post DataList query.
*
* @var DataList
**/
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protected $blogPosts;
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public function index() {
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$this->blogPosts = $this->getBlogPosts();
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return $this->render();
}
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/**
* Renders an archive for a specificed date. This can be by year or year/month
*
* @return SS_HTTPResponse
**/
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public function archive() {
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$year = $this->getArchiveYear();
$month = $this->getArchiveMonth();
$day = $this->getArchiveDay();
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// If an invalid month has been passed, we can return a 404.
if($this->request->param("Month") && !$month) {
return $this->httpError(404, "Not Found");
// Check for valid day
if($this->request->param("Day") && !$day) {
return $this->httpError(404, "Not Found");
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}
}
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if($year) {
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$this->blogPosts = $this->getArchivedBlogPosts($year, $month, $day);
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return $this->render();
}
return $this->httpError(404, "Not Found");
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}
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/**
* Renders the blog posts for a given tag.
*
* @return SS_HTTPResponse
**/
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public function tag() {
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$tag = $this->getCurrentTag();
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if($tag) {
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$this->blogPosts = $tag->BlogPosts();
return $this->render();
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}
return $this->httpError(404, "Not Found");
}
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/**
* Renders the blog posts for a given category
*
* @return SS_HTTPResponse
**/
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public function category() {
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$category = $this->getCurrentCategory();
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if($category) {
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$this->blogPosts = $category->BlogPosts();
return $this->render();
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}
return $this->httpError(404, "Not Found");
}
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/**
* Displays an RSS feed of blog posts
*
* @return string HTML
**/
public function rss() {
$rss = new RSSFeed($this->getBlogPosts(), $this->Link(), $this->MetaDescription, $this->MetaTitle);
return $rss->outputToBrowser();
}
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/**
* Returns a list of paginated blog posts based on the blogPost dataList
*
* @return PaginatedList
**/
public function PaginatedList() {
$posts = new PaginatedList($this->blogPosts);
// If pagination is set to '0' then no pagination will be shown.
if($this->PostsPerPage > 0) $posts->setPageLength($this->PostsPerPage);
else $posts->setPageLength($this->getBlogPosts()->count());
$start = $this->request->getVar($posts->getPaginationGetVar());
$posts->setPageStart($start);
return $posts;
}
/**
* Tag Getter for use in templates.
*
* @return BlogTag|null
**/
public function getCurrentTag() {
$tag = $this->request->param("Tag");
if($tag) {
return $this->dataRecord->Tags()
->filter("URLSegment", $tag)
->first();
}
return null;
}
/**
* Category Getter for use in templates.
*
* @return BlogCategory|null
**/
public function getCurrentCategory() {
$category = $this->request->param("Category");
if($category) {
return $this->dataRecord->Categories()
->filter("URLSegment", $category)
->first();
}
return null;
}
/**
* Fetches the archive year from the url
*
* @return int|null
**/
public function getArchiveYear() {
$year = $this->request->param("Year");
if(preg_match("/^[0-9]{4}$/", $year)) {
return (int) $year;
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}
return null;
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}
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/**
* Fetches the archive money from the url.
*
* @return int|null
**/
public function getArchiveMonth() {
$month = $this->request->param("Month");
if(preg_match("/^[0-9]{1,2}$/", $month)) {
if($month > 0 && $month < 13) {
// Check that we have a valid date.
if(checkdate($month, 01, $this->getArchiveYear())) {
return (int) $month;
}
}
}
return null;
}
/**
* Fetches the archive day from the url
*
* @return int|null
**/
public function getArchiveDay() {
$day = $this->request->param("Day");
if(preg_match("/^[0-9]{1,2}$/", $day)) {
// Check that we have a valid date
if(checkdate($this->getArchiveMonth(), $day, $this->getArchiveYear())) {
return (int) $day;
}
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}
return null;
}
/**
* Returns the current archive date.
*
* @return Date
**/
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public function getArchiveDate() {
$year = $this->getArchiveYear();
$month = $this->getArchiveMonth();
$day = $this->getArchiveDay();
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if($year) {
if($month) {
$date = $year . '-' . $month . '-01';
if($day) {
$date = $year . '-' . $month . '-' . $day;
}
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} else {
$date = $year . '-01-01';
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}
return DBField::create_field("Date", $date);
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}
}
/**
* Returns a link to the RSS feed.
*
* @return string URL
**/
public function getRSSLink() {
return $this->Link("rss");
}
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}