374 lines
12 KiB
PHP
374 lines
12 KiB
PHP
<?php
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class DMSDocument extends DataObject implements DMSDocumentInterface {
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static $db = array(
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"Filename" => "Varchar(255)", // eg. 3469~2011-energysaving-report.pdf
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"Folder" => "Varchar(255)", // eg. 0
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"Title" => 'Varchar(1024)', // eg. "Energy Saving Report for Year 2011, New Zealand LandCorp"
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"Description" => 'Text',
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"LastChanged" => 'SS_DateTime' //when this document's file was created or last replaced (small changes like updating title don't count)
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);
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static $many_many = array(
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'Pages' => 'SiteTree',
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'Tags' => 'DMSTag'
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);
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protected $dms; //this DMSDocument's associated DMS instance
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function __construct($dms = null) {
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$this->dms = $dms;
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}
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/**
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* Associates this document with a Page. This method does nothing if the association already exists.
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* This could be a simple wrapper around $myDoc->Pages()->add($myPage) to add a many_many relation
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* @param $pageObject Page object to associate this Document with
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* @return null
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*/
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function addPage($pageObject) {
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$this->Pages()->add($pageObject);
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}
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/**
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* Associates this DMSDocument with a set of Pages. This method loops through a set of page ids, and then associates this
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* DMSDocument with the individual Page with the each page id in the set
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* @abstract
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* @param $pageIDs array of page ids used for the page objects associate this DMSDocument with
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* @return null
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*/
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function addPages($pageIDs){
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foreach($pageIDs as $id){
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$pageObject = DataObject::get_by_id("SiteTree", $id);
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if($pageObject && $pageObject->exists()) {
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$this->addPage($pageObject);
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}
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}
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}
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/**
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* Removes the association between this Document and a Page. This method does nothing if the association does not exist.
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* @param $pageObject Page object to remove the association to
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* @return mixed
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*/
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function removePage($pageObject) {
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$this->Pages()->remove($pageObject);
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}
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/**
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* Returns a list of the Page objects associated with this Document
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* @return DataList
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*/
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function getPages() {
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$this->Pages();
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}
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/**
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* Removes all associated Pages from the DMSDocument
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* @return null
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*/
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function removeAllPages() {
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$this->Pages()->removeAll();
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}
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/**
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* Adds a metadata tag to the Document. The tag has a category and a value.
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* Each category can have multiple values by default. So: addTag("fruit","banana") addTag("fruit", "apple") will add two items.
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* However, if the third parameter $multiValue is set to 'false', then all updates to a category only ever update a single value. So:
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* addTag("fruit","banana") addTag("fruit", "apple") would result in a single metadata tag: fruit->apple.
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* Can could be implemented as a key/value store table (although it is more like category/value, because the
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* same category can occur multiple times)
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* @param $category String of a metadata category to add (required)
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* @param $value String of a metadata value to add (required)
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* @param bool $multiValue Boolean that determines if the category is multi-value or single-value (optional)
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* @return null
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*/
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function addTag($category, $value, $multiValue = true) {
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if ($multiValue) {
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//check for a duplicate tag, don't add the duplicate
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$currentTag = $this->Tags()->filter(array('Category' => $category, 'Value' => $value));
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if ($currentTag->Count() == 0) {
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//multi value tag
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$tag = new DMSTag();
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$tag->Category = $category;
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$tag->Value = $value;
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$tag->MultiValue = true;
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$tag->write();
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$tag->Documents()->add($this);
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} else {
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//add the relation between the tag and document
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foreach($currentTag as $tagObj) {
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$tagObj->Documents()->add($this);
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}
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}
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} else {
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//single value tag
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$currentTag = $this->Tags()->filter(array('Category' => $category));
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$tag = null;
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if ($currentTag->Count() == 0) {
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//create the single-value tag
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$tag = new DMSTag();
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$tag->Category = $category;
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$tag->Value = $value;
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$tag->MultiValue = false;
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$tag->write();
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} else {
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//update the single value tag
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$tag = $currentTag->first();
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$tag->Value = $value;
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$tag->MultiValue = false;
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$tag->write();
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}
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//regardless of whether we created a new tag or are just updating an existing one, add the relation
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$tag->Documents()->add($this);
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}
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}
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protected function getTagsObjects($category, $value = null) {
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$valueFilter = array("Category" => $category);
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if (!empty($value)) $valueFilter['Value'] = $value;
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$tags = $this->Tags()->filter($valueFilter);
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return $tags;
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}
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/**
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* Fetches all tags associated with this DMSDocument within a given category. If a value is specified this method
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* tries to fetch that specific tag.
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* @abstract
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* @param $category String of the metadata category to get
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* @param null $value String of the value of the tag to get
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* @return array of Strings of all the tags or null if there is no match found
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*/
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function getTags($category, $value = null) {
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$tags = $this->getTagsObjects($category, $value);
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//convert DataList into array of Values
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$returnArray = null;
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if ($tags->Count() > 0) {
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$returnArray = array();
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foreach($tags as $t) {
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$returnArray[] = $t->Value;
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}
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}
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return $returnArray;
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}
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/**
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* Quick way to add multiple tags to a Document. This takes a multidimensional array of category/value pairs.
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* The array should look like this:
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* $twoDimensionalArray = new array(
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* array('fruit','banana'),
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* array('fruit','apple')
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* );
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* @param $twoDimensionalArray array containing a list of arrays
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* @param bool $multiValue Boolean that determines if the category is multi-value or single-value (optional)
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* @return null
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*/
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function addTags($twoDimensionalArray, $multiValue = true) {
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// TODO: Implement addTags() method.
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}
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/**
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* Removes a tag from the Document. If you only set a category, then all values in that category are deleted.
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* If you specify both a category and a value, then only that single category/value pair is deleted.
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* Nothing happens if the category or the value do not exist.
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* @param $category Category to remove (required)
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* @param null $value Value to remove (optional)
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* @return null
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*/
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function removeTag($category, $value = null) {
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$tags = $this->getTagsObjects($category, $value);
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if ($tags->Count() > 0) {
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foreach($tags as $t) {
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$documentList = $t->Documents();
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//remove the relation between the tag and the document
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$documentList->remove($this);
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//delete the entire tag if it has no relations left
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if ($documentList->Count() == 0) $t->delete();
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}
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}
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}
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/**
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* Deletes all tags associated with this Document.
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* @return null
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*/
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function removeAllTags() {
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$allTags = $this->Tags();
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foreach($allTags as $tag) {
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$documentlist = $tag->Documents();
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$documentlist->remove($this);
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if ($tag->Documents()->Count() == 0) $tag->delete();
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}
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}
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/**
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* Returns a multi-dimensional array containing all Tags associated with this Document. The array has the
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* following structure:
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* $twoDimensionalArray = new array(
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* array('fruit','banana'),
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* array('fruit','apple')
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* );
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* @return array Multi-dimensional array of tags
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*/
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function getAllTags() {
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// TODO: Implement getAllTags() method.
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}
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/**
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* Returns a link to download this document from the DMS store
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* @return String
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*/
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function downloadLink() {
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// TODO: Implement downloadLink() method.
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}
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/**
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* Hides the document, so it does not show up when getByPage($myPage) is called
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* (without specifying the $showEmbargoed = true parameter). This is similar to expire, except that this method
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* should be used to hide documents that have not yet gone live.
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* @return null
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*/
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function embargo() {
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// TODO: Implement embargo() method.
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}
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/**
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* Returns if this is Document is embargoed.
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* @return bool True or False depending on whether this document is embargoed
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*/
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function isEmbargoed() {
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// TODO: Implement isEmbargoed() method.
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}
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/**
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* Hides the document, so it does not show up when getByPage($myPage) is called. Automatically un-hides the
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* Document at a specific date.
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* @param $datetime String date time value when this Document should expire
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* @return null
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*/
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function embargoUntilDate($datetime) {
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// TODO: Implement embargoUntilDate() method.
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}
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/**
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* Clears any previously set embargos, so the Document always shows up in all queries.
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* @return null
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*/
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function clearEmbargo() {
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// TODO: Implement clearEmbargo() method.
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}
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/**
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* Hides the document, so it does not show up when getByPage($myPage) is called.
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* (without specifying the $showEmbargoed = true parameter). This is similar to embargo, except that it should be
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* used to hide documents that are no longer useful.
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* @return null
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*/
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function expire() {
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// TODO: Implement expire() method.
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}
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/**
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* Returns if this is Document is expired.
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* @return bool True or False depending on whether this document is expired
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*/
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function isExpired() {
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// TODO: Implement isExpired() method.
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}
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/**
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* Hides the document at a specific date, so it does not show up when getByPage($myPage) is called.
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* @param $datetime String date time value when this Document should expire
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* @return null
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*/
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function expireAtDate($datetime) {
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// TODO: Implement expireAtDate() method.
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}
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/**
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* Clears any previously set expiry.
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* @return null
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*/
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function clearExpiry() {
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// TODO: Implement clearExpiry() method.
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}
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/**
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* Returns a DataList of all previous Versions of this document (check the LastEdited date of each
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* object to find the correct one)
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* @return DataList List of Document objects
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*/
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function getVersions() {
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// TODO: Implement getVersions() method.
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}
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/**
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* Returns the full filename of the document stored in this object
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* @return string
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*/
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function getFullPath() {
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return DMS::$dmsPath . DIRECTORY_SEPARATOR . $this->Folder . DIRECTORY_SEPARATOR . $this->Filename;
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}
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/**
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* Deletes the DMSDocument, its underlying file, as well as any tags related to this DMSDocument. Also calls the
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* parent DataObject's delete method.
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*/
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function delete() {
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//remove tags
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$this->removeAllTags();
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//delete the file
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unlink($this->getFullPath());
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$this->removeAllPages();
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//delete the dataobject
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parent::delete();
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}
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function storeDocument($filePath) {
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if (empty($this->ID)) user_error("Document must be written to database before it can store documents",E_USER_ERROR);
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if (empty($dms) || !(is_a($dms, 'DMS'))) user_error("You need to provide a DMS object when storing a document",E_USER_ERROR);
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//calculate all the path to copy the file to
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$fromFilename = basename($filePath);
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$toFilename = $this->ID. '~' . $fromFilename; //add the docID to the start of the Filename
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$toFolder = $this->dms->getStorageFolder($this->ID);
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$toPath = DMS::$dmsPath . DIRECTORY_SEPARATOR . $toFolder . DIRECTORY_SEPARATOR . $toFilename;
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$this->dms->createStorageFolder(DMS::$dmsPath . DIRECTORY_SEPARATOR . $toFolder);
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//copy the file into place
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$fromPath = BASE_PATH . DIRECTORY_SEPARATOR . $filePath;
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copy($fromPath, $toPath); //this will overwrite the existing file (if present)
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//write the filename of the stored document
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$this->Filename = $toFilename;
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$this->Folder = $toFolder;
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if (empty($this->Title)) $this->Title = $fromFilename; //don't overwrite existing document titles
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$this->LastChanged = SS_Datetime::now()->Rfc2822();
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$this->write();
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return $this;
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}
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/**
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* Takes a File object or a String (path to a file) and copies it into the DMS, replacing the original document file
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* but keeping the rest of the document unchanged.
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* @param $file File object, or String that is path to a file to store
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* @return DMSDocumentInstance Document object that we replaced the file in
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*/
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function replaceDocument($file) {
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$filePath = $this->dms->transformFileToFilePath($file);
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$doc = $this->storeDocument($filePath); //replace the document
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return $doc;
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}
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} |