silverstripe-dms/code/DMSDocument.php
2012-07-27 12:37:39 +12:00

325 lines
9.8 KiB
PHP

<?php
class DMSDocument extends DataObject implements DMSDocumentInterface {
static $db = array(
"Filename" => "Varchar(255)", // eg. 3469~2011-energysaving-report.pdf
"Folder" => "Varchar(255)", // eg. 0
"Title" => 'Varchar(1024)', // eg. "Energy Saving Report for Year 2011, New Zealand LandCorp"
"Description" => 'Text',
"LastChanged" => 'SS_DateTime' //when this document was created or last replaced (small changes like updating title don't count)
);
static $many_many = array(
'Pages' => 'SiteTree',
'Tags' => 'DMSTag'
);
/**
* Associates this document with a Page. This method does nothing if the association already exists.
* This could be a simple wrapper around $myDoc->Pages()->add($myPage) to add a has_many relation
* @param $pageObject Page object to associate this Document with
* @return null
*/
function addPage($pageObject) {
$this->Pages()->add($pageObject);
}
/**
* Removes the association between this Document and a Page. This method does nothing if the association does not exist.
* @param $pageObject Page object to remove the association to
* @return mixed
*/
function removePage($pageObject) {
$this->Pages()->remove($pageObject);
}
/**
* Returns a list of the Page objects associated with this Document
* @return DataList
*/
function getPages() {
$this->Pages();
}
/**
* Removes all associated Pages from the DMSDocument
* @return null
*/
function removeAllPages() {
$this->Pages()->removeAll();
}
/**
* Adds a metadata tag to the Document. The tag has a category and a value.
* Each category can have multiple values by default. So: addTag("fruit","banana") addTag("fruit", "apple") will add two items.
* However, if the third parameter $multiValue is set to 'false', then all updates to a category only ever update a single value. So:
* addTag("fruit","banana") addTag("fruit", "apple") would result in a single metadata tag: fruit->apple.
* Can could be implemented as a key/value store table (although it is more like category/value, because the
* same category can occur multiple times)
* @param $category String of a metadata category to add (required)
* @param $value String of a metadata value to add (required)
* @param bool $multiValue Boolean that determines if the category is multi-value or single-value (optional)
* @return null
*/
function addTag($category, $value, $multiValue = true) {
if ($multiValue) {
//check for a duplicate tag, don't add the duplicate
$currentTag = $this->Tags()->filter(array('Category' => $category, 'Value' => $value));
if ($currentTag->Count() == 0) {
//multi value tag
$tag = new DMSTag();
$tag->Category = $category;
$tag->Value = $value;
$tag->MultiValue = true;
$tag->write();
$tag->Documents()->add($this);
} else {
//add the relation between the tag and document
foreach($currentTag as $tagObj) {
$tagObj->Documents()->add($this);
}
}
} else {
//single value tag
$currentTag = $this->Tags()->filter(array('Category' => $category));
$tag = null;
if ($currentTag->Count() == 0) {
//create the single-value tag
$tag = new DMSTag();
$tag->Category = $category;
$tag->Value = $value;
$tag->MultiValue = false;
$tag->write();
} else {
//update the single value tag
$tag = $currentTag->first();
$tag->Value = $value;
$tag->MultiValue = false;
$tag->write();
}
//regardless of whether we created a new tag or are just updating an existing one, add the relation
$tag->Documents()->add($this);
}
}
protected function getTagsObjects($category, $value = null) {
$valueFilter = array("Category" => $category);
if (!empty($value)) $valueFilter['Value'] = $value;
$tags = $this->Tags()->filter($valueFilter);
return $tags;
}
/**
* Fetches all tags associated with this DMSDocument within a given category. If a value is specified this method
* tries to fetch that specific tag.
* @abstract
* @param $category String of the metadata category to get
* @param null $value String of the value of the tag to get
* @return array of Strings of all the tags or null if there is no match found
*/
function getTags($category, $value = null) {
$tags = $this->getTagsObjects($category, $value);
//convert DataList into array of Values
$returnArray = null;
if ($tags->Count() > 0) {
$returnArray = array();
foreach($tags as $t) {
$returnArray[] = $t->Value;
}
}
return $returnArray;
}
/**
* Quick way to add multiple tags to a Document. This takes a multidimensional array of category/value pairs.
* The array should look like this:
* $twoDimensionalArray = new array(
* array('fruit','banana'),
* array('fruit','apple')
* );
* @param $twoDimensionalArray array containing a list of arrays
* @param bool $multiValue Boolean that determines if the category is multi-value or single-value (optional)
* @return null
*/
function addTags($twoDimensionalArray, $multiValue = true) {
// TODO: Implement addTags() method.
}
/**
* Removes a tag from the Document. If you only set a category, then all values in that category are deleted.
* If you specify both a category and a value, then only that single category/value pair is deleted.
* Nothing happens if the category or the value do not exist.
* @param $category Category to remove (required)
* @param null $value Value to remove (optional)
* @return null
*/
function removeTag($category, $value = null) {
$tags = $this->getTagsObjects($category, $value);
if ($tags->Count() > 0) {
foreach($tags as $t) {
$documentList = $t->Documents();
//remove the relation between the tag and the document
$documentList->remove($this);
//delete the entire tag if it has no relations left
if ($documentList->Count() == 0) $t->delete();
}
}
}
/**
* Deletes all tags associated with this Document.
* @return null
*/
function removeAllTags() {
$allTags = $this->Tags();
foreach($allTags as $tag) {
$documentlist = $tag->Documents();
$documentlist->remove($this);
if ($tag->Documents()->Count() == 0) $tag->delete();
}
}
/**
* Returns a multi-dimensional array containing all Tags associated with this Document. The array has the
* following structure:
* $twoDimensionalArray = new array(
* array('fruit','banana'),
* array('fruit','apple')
* );
* @return array Multi-dimensional array of tags
*/
function getAllTags() {
// TODO: Implement getAllTags() method.
}
/**
* Returns a link to download this document from the DMS store
* @return String
*/
function downloadLink() {
// TODO: Implement downloadLink() method.
}
/**
* Hides the document, so it does not show up when getByPage($myPage) is called
* (without specifying the $showEmbargoed = true parameter). This is similar to expire, except that this method
* should be used to hide documents that have not yet gone live.
* @return null
*/
function embargo() {
// TODO: Implement embargo() method.
}
/**
* Returns if this is Document is embargoed.
* @return bool True or False depending on whether this document is embargoed
*/
function isEmbargoed() {
// TODO: Implement isEmbargoed() method.
}
/**
* Hides the document, so it does not show up when getByPage($myPage) is called. Automatically un-hides the
* Document at a specific date.
* @param $datetime String date time value when this Document should expire
* @return null
*/
function embargoUntilDate($datetime) {
// TODO: Implement embargoUntilDate() method.
}
/**
* Clears any previously set embargos, so the Document always shows up in all queries.
* @return null
*/
function clearEmbargo() {
// TODO: Implement clearEmbargo() method.
}
/**
* Hides the document, so it does not show up when getByPage($myPage) is called.
* (without specifying the $showEmbargoed = true parameter). This is similar to embargo, except that it should be
* used to hide documents that are no longer useful.
* @return null
*/
function expire() {
// TODO: Implement expire() method.
}
/**
* Returns if this is Document is expired.
* @return bool True or False depending on whether this document is expired
*/
function isExpired() {
// TODO: Implement isExpired() method.
}
/**
* Hides the document at a specific date, so it does not show up when getByPage($myPage) is called.
* @param $datetime String date time value when this Document should expire
* @return null
*/
function expireAtDate($datetime) {
// TODO: Implement expireAtDate() method.
}
/**
* Clears any previously set expiry.
* @return null
*/
function clearExpiry() {
// TODO: Implement clearExpiry() method.
}
/**
* Returns a DataList of all previous Versions of this document (check the LastEdited date of each
* object to find the correct one)
* @return DataList List of Document objects
*/
function getVersions() {
// TODO: Implement getVersions() method.
}
/**
* Returns the full filename of the document stored in this object
* @return string
*/
function getFullPath() {
return DMS::$dmsPath . DIRECTORY_SEPARATOR . $this->Folder . DIRECTORY_SEPARATOR . $this->Filename;
}
/**
* Deletes the DMSDocument, its underlying file, as well as any tags related to this DMSDocument. Also calls the
* parent DataObject's delete method.
*/
function delete() {
//remove tags
$this->removeAllTags();
//delete the file
unlink($this->getFullPath());
$this->removeAllPages();
//delete the dataobject
parent::delete();
}
/**
* Takes a File object or a String (path to a file) and copies it into the DMS, replacing the original document file
* but keeping the rest of the document unchanged.
* @param $file File object, or String that is path to a file to store
* @return DMSDocumentInstance Document object that we replaced the file in
*/
function replaceDocument($file) {
// TODO: Implement replace() method.
}
}