AtomODataWriter::__construct() - Code Metrics - Inspection of "WIP: Object model" - Algo-Web/POData - Measure and Improve Code Quality continuously with Scrutinizer

Completed
Pull Request — master (#269)

by Christopher
created 2020-05-17 13:57 UTC
AtomODataWriter::__construct() A

↳ Parent: AtomODataWriter
Complexity

Conditions	3
Paths	2
Size

Total Lines	14
Code Lines	10
Duplication

Lines	0
Ratio	0 %
Importance

Changes	1
Bugs	0	Features	0
Metric	Value
cc	3
eloc	10
c	1
b	0
f	0
nc	2
nop	3
dl	0
loc	14
rs	9.9332
<?php

declare(strict_types=1);

namespace POData\Writers\Atom;

use DateTimeZone;
use Exception;
use POData\Common\MimeTypes;
use POData\Common\ODataConstants;
use POData\Common\ODataException;
use POData\Common\Version;
use POData\Configuration\ServiceConfiguration;
use POData\ObjectModel\ODataBagContent;
use POData\ObjectModel\ODataCategory;
use POData\ObjectModel\ODataEntry;
use POData\ObjectModel\ODataFeed;
use POData\ObjectModel\ODataLink;
use POData\ObjectModel\ODataProperty;
use POData\ObjectModel\ODataPropertyContent;
use POData\ObjectModel\ODataTitle;
use POData\ObjectModel\ODataURL;
use POData\ObjectModel\ODataURLCollection;
use POData\Providers\Metadata\Type\DateTime;
use POData\Providers\ProvidersWrapper;
use POData\Writers\IODataWriter;
use XMLWriter;

/**
 * Class AtomODataWriter.
 */
class AtomODataWriter implements IODataWriter
{
    /**
     * XML prefix for the Atom namespace.
     *
     * @var string
     */
    const ATOM_NAMESPACE_PREFIX = 'atom';
    /**
     * XML prefix for the Atom Publishing Protocol namespace.
     *
     * @var string
     */
    const APP_NAMESPACE_PREFIX = 'app';

    /*
     * Update time to insert into ODataEntry/ODataFeed fields
     * @var \DateTime;
     */
    /**
     * Writer to which output (CSDL Document) is sent.
     *
     * @var XMLWriter
     */
    public $xmlWriter;
    /**
     * The service base uri.
     *
     * @var string
     */
    protected $baseUri;
    private $updated;

    /**
     * Construct a new instance of AtomODataWriter.
     *
     * @param string $absoluteServiceUri The absolute service Uri
     */
    public function __construct(string $eol, bool $prettyPrint, $absoluteServiceUri = '')
    {
        $final = substr($absoluteServiceUri, -1);
        if ('/' != $final) {
            $absoluteServiceUri .= '/';
        }
        $this->baseUri = $absoluteServiceUri;
        $this->updated = DateTime::now();

        $this->xmlWriter = new XMLWriter();
        $this->xmlWriter->openMemory();
        $this->xmlWriter->startDocument('1.0', 'UTF-8', 'yes');
        $this->xmlWriter->setIndent($prettyPrint);
        $this->xmlWriter->setIndentString($prettyPrint ? '    ' : '');
    }

    /**
     * Serialize the exception.
     *
     * @param ODataException $exception Exception to serialize
     *
     * @return string
     */
    public static function serializeException(ODataException $exception, ServiceConfiguration $config)
    {
        $xmlWriter = new XMLWriter();
        $xmlWriter->openMemory();
        $xmlWriter->startDocument('1.0', 'UTF-8', 'yes');
        $xmlWriter->setIndent($config->getPrettyOutput());
        $xmlWriter->setIndentString($config->getPrettyOutput() ? '    ' : '');

        $xmlWriter->startElement(ODataConstants::XML_ERROR_ELEMENT_NAME);
        //$xmlWriter->writeAttributeNs(
        //    ODataConstants::XMLNS_NAMESPACE_PREFIX,
        //    ODataConstants::XML_NAMESPACE_PREFIX,
        //    ODataConstants::XML_NAMESPACE,
        //    null
        //);
        $xmlWriter->writeAttribute(
            ODataConstants::XMLNS_NAMESPACE_PREFIX,
            ODataConstants::ODATA_METADATA_NAMESPACE
        );
        $xmlWriter->endAttribute();
        $xmlWriter->startElement(ODataConstants::XML_ERROR_CODE_ELEMENT_NAME);
        if (null != $exception->getStatusCode()) {
            $xmlWriter->text(strval($exception->getStatusCode()));
        }
        $xmlWriter->endElement();
        $xmlWriter->startElement(ODataConstants::XML_ERROR_MESSAGE_ELEMENT_NAME);
        $xmlWriter->text($exception->getMessage());
        $xmlWriter->endElement();
        $xmlWriter->endElement();
        $xmlWriter->endDocument();

        return $xmlWriter->outputMemory(true);
    }

    /**
     * Determines if the given writer is capable of writing the response or not.
     *
     * @param Version $responseVersion the OData version of the response
     * @param string  $contentType     the Content Type of the response
     *
     * @return bool true if the writer can handle the response, false otherwise
     */
    public function canHandle(Version $responseVersion, $contentType)
    {
        $parts = explode(';', $contentType);

        //first 2 parts are for service documents, second part is for Resources
        //TODO: i'm not sold about this first part not being constrained to v1 (or maybe v2)..
        //but it's how WS DS works. See #94
        return in_array(MimeTypes::MIME_APPLICATION_XML, $parts)
            || in_array(MimeTypes::MIME_APPLICATION_ATOMSERVICE, $parts)
            || in_array(MimeTypes::MIME_APPLICATION_ATOM, $parts);
    }

    /**
     * Write the given OData model in a specific response format.
     *
     * @param ODataURL|ODataURLCollection|ODataPropertyContent|ODataFeed|ODataEntry $model Object of requested content
     *
     * @throws Exception
     * @return AtomODataWriter
     */
    public function write($model)
    {
        if ($model instanceof ODataURL) {
            return $this->writeUrl($model);
        }

        if ($model instanceof ODataURLCollection) {
            return $this->writeUrlCollection($model);
        }

        if ($model instanceof ODataPropertyContent) {
            return $this->writeProperties($model, true);
        }

        if ($model instanceof ODataFeed) {
            return $this->writeFeed($model, true);
        }

        if ($model instanceof ODataEntry) {

            return $this->writeEntry($model, true);
        }

        return $this;
    }

    /**
     * @param ODataURL $url the url to write
     *
     * @return AtomODataWriter
     */
    protected function writeUrl(ODataURL $url)
    {
        $this->xmlWriter->startElement(ODataConstants::ATOM_URI_ELEMENT_NAME);
        $this->xmlWriter->writeAttribute(ODataConstants::XMLNS_NAMESPACE_PREFIX, ODataConstants::ODATA_NAMESPACE);
        $this->xmlWriter->text($url->getUrl());
        $this->xmlWriter->endElement();

        return $this;
    }

    /**
     * Begin write OData links.
     *
     * @param ODataURLCollection $urls Object of ODataUrlCollection to start writing collection of url
     *
     * @return AtomODataWriter
     */
    public function writeUrlCollection(ODataURLCollection $urls)
    {
        $this->xmlWriter->startElement(ODataConstants::ATOM_LINKS_ELEMENT_NAME);
        $this->xmlWriter->writeAttribute(
            ODataConstants::XMLNS_NAMESPACE_PREFIX,
            ODataConstants::ODATA_NAMESPACE
        );
        $this->xmlWriter->endAttribute();
        if ($urls->getCount() !== null) {
            $this->xmlWriter->writeAttributeNs(
                ODataConstants::XMLNS_NAMESPACE_PREFIX,
                ODataConstants::ODATA_METADATA_NAMESPACE_PREFIX,
                null,
                ODataConstants::ODATA_METADATA_NAMESPACE
            );
            $this->xmlWriter->endAttribute();
            $this->xmlWriter->startElementNs(
                ODataConstants::ODATA_METADATA_NAMESPACE_PREFIX,
                ODataConstants::ROWCOUNT_ELEMENT,
                null
            );
            $this->xmlWriter->text(strval($urls->getCount()));
            $this->xmlWriter->endElement();
        }
        foreach ($urls->getUrls() as $url) {
            $this->writeNodeValue(ODataConstants::ATOM_URI_ELEMENT_NAME, $url->getUrl());
        }

        if ($urls->getNextPageLink() != null) {
            $this->writeLinkNode($urls->getNextPageLink(), false);
        }
        $this->xmlWriter->endElement();

        return $this;
    }

    /**
     * Function to create element only contain value without argument.
     *
     * @param string $node  Element name
     * @param string $value Element value
     *
     * @return AtomODataWriter
     */
    public function writeNodeValue($node, $value)
    {
        $this->xmlWriter->startElement($node);
        $this->xmlWriter->text($value ?? '');
        $this->xmlWriter->endElement();

        return $this;
    }

    /**
     * Function to create link element with arguments.
     *
     * @param ODataLink $link       Link object to make link element
     * @param bool      $isExpanded Is link expanded or not
     *
     * @return AtomODataWriter
     */
    protected function writeLinkNode(ODataLink $link, $isExpanded)
    {
        $this->xmlWriter->startElement(ODataConstants::ATOM_LINK_ELEMENT_NAME);
        $this->xmlWriter->writeAttribute(
            ODataConstants::ATOM_LINK_RELATION_ATTRIBUTE_NAME,
            $link->getName() ?? ''
        );
        if ($link->getType() != null) {
            $this->xmlWriter->writeAttribute(
                ODataConstants::ATOM_TYPE_ATTRIBUTE_NAME,
                $link->getType() ?? ''
            );
        }
        if ($link->getTitle() != null) {
            $this->xmlWriter->writeAttribute(
                ODataConstants::ATOM_TITLE_ELELMET_NAME,
                $link->getTitle() ?? ''
            );
        }
        $this->xmlWriter->writeAttribute(
            ODataConstants::ATOM_HREF_ATTRIBUTE_NAME,
            $link->getUrl() ?? ''
        );
        if (!$isExpanded) {
            $this->xmlWriter->endElement();
        }

        return $this;
    }

    /**
     * Write the given collection of properties.
     * (properties of an entity or complex type).
     *
     * @param ODataPropertyContent $properties Collection of properties
     * @param bool                 $topLevel   is this property content is the top level response to be written?
     *
     * @throws Exception
     * @return AtomODataWriter
     */
    protected function writeProperties(ODataPropertyContent $properties = null, $topLevel = false)
    {
        if (null !== $properties) {
            foreach ($properties as $property) {
                $this->beginWriteProperty($property, $topLevel);

                if ($property->value == null) {
                    $this->writeNullValue($property);
                } elseif ($property->value instanceof ODataPropertyContent) {
                    $this->writeProperties($property->value, false);
                } elseif ($property->value instanceof ODataBagContent) {
                    $this->writeBagContent($property->value);
                } else {
                    $value = $this->beforeWriteValue($property->value, $property->typeName);
                    $this->xmlWriter->text(strval($value));
                }

                $this->xmlWriter->endElement();
            }
        }

        return $this;
    }

    /**
     * Write a property.
     *
     * @param ODataProperty $property   Property to be written
     * @param bool          $isTopLevel is link top level or not
     *
     * @return AtomODataWriter
     */
    protected function beginWriteProperty(ODataProperty $property, $isTopLevel)
    {
        $this->xmlWriter->startElementNs(
            ODataConstants::ODATA_NAMESPACE_PREFIX,
            $property->name,
            null
        );
        if ($property->typeName != null) {
            $this->xmlWriter->startAttributeNs(
                ODataConstants::ODATA_METADATA_NAMESPACE_PREFIX,
                ODataConstants::ATOM_TYPE_ATTRIBUTE_NAME,
                null
            );
            $this->xmlWriter->text($property->typeName);
        }
        if ($isTopLevel) {
            $this->xmlWriter->startAttribute(ODataConstants::XMLNS_NAMESPACE_PREFIX);
            $this->xmlWriter->text(ODataConstants::ODATA_METADATA_NAMESPACE);
            $this->xmlWriter->startAttributeNs(
                ODataConstants::XMLNS_NAMESPACE_PREFIX,
                ODataConstants::ODATA_NAMESPACE_PREFIX,
                null
            );
            $this->xmlWriter->text(ODataConstants::ODATA_NAMESPACE);
            $this->xmlWriter->startAttributeNs(
                ODataConstants::XMLNS_NAMESPACE_PREFIX,
                ODataConstants::ODATA_METADATA_NAMESPACE_PREFIX,
                null
            );
            $this->xmlWriter->text(ODataConstants::ODATA_METADATA_NAMESPACE);
        }
        if ($property->typeName != null || $isTopLevel) {
            $this->xmlWriter->endAttribute();
        }

        return $this;
    }

    /**
     * Write null value.
     *
     * @param ODataProperty $property ODataProperty object to write null value
     *                                according to property type
     *
     * @return AtomODataWriter
     */
    protected function writeNullValue(ODataProperty $property)
    {
        $this->xmlWriter->writeAttributeNs(
            ODataConstants::ODATA_METADATA_NAMESPACE_PREFIX,
            ODataConstants::ATOM_NULL_ATTRIBUTE_NAME,
            null,
            ODataConstants::XML_TRUE_LITERAL
        );

        return $this;
    }

    /**
     * Begin an item in a collection.
     *
     * @param ODataBagContent $bag Bag property object to begin write property
     *
     * @throws Exception
     * @return AtomODataWriter
     */
    protected function writeBagContent(ODataBagContent $bag)
    {
        foreach ($bag->getPropertyContents() as $content) {
            if ($content instanceof ODataPropertyContent) {
                $this->xmlWriter->startElementNs(
                    ODataConstants::ODATA_NAMESPACE_PREFIX,
                    ODataConstants::COLLECTION_ELEMENT_NAME,
                    null
                );
                $this->writeProperties($content);
                $this->xmlWriter->endElement();
            } else {
                //probably just a primitive string
                $this->xmlWriter->startElementNs(
                    ODataConstants::ODATA_NAMESPACE_PREFIX,
                    ODataConstants::COLLECTION_ELEMENT_NAME,
                    null
                );
                $this->xmlWriter->text($content);
                $this->xmlWriter->endElement();
            }
        }

        return $this;
    }

    /**
     * XML write a basic data type (string, number, boolean, null).
     *
     * @param string $value value to be written
     * @param string $type  |null data type of the value
     *
     * @throws Exception
     * @return string
     */
    protected function beforeWriteValue($value, $type = null)
    {
        switch ($type) {
            case 'Edm.DateTime':
                $dateTime = new \DateTime($value, new DateTimeZone('UTC'));
                $result   = $dateTime->format('Y-m-d\TH:i:s');
                break;

            default:
                $result = $value;
        }

        return $result;
    }

    /**
     * Begin write OData Feed.
     *
     * @param ODataFeed $feed       Object of OData feed to start writing feed
     * @param bool      $isTopLevel indicates if this is the top level feed in the response
     *
     * @throws Exception
     * @return AtomODataWriter
     */
    protected function writeFeed(ODataFeed $feed, $isTopLevel = false)
    {
        $this->xmlWriter->startElement(ODataConstants::ATOM_FEED_ELEMENT_NAME);
        if ($isTopLevel) {
            $this->writeBaseUriAndDefaultNamespaces();
        }

        $effectiveTitle = $feed->getTitle()->getTitle();
        $this
            ->writeNodeAttributeValue(
                ODataConstants::ATOM_TITLE_ELELMET_NAME,
                ODataConstants::ATOM_TYPE_ATTRIBUTE_NAME,
                MimeTypes::MIME_TEXTTYPE,
                $effectiveTitle
            )
            ->writeNodeValue(ODataConstants::ATOM_ID_ELEMENT_NAME, $feed->id)
            ->writeNodeValue(ODataConstants::ATOM_UPDATED_ELEMENT_NAME, $this->getUpdated()->format(DATE_ATOM))
            ->writeLinkNode($feed->getSelfLink(), false);
            ->writeLinkNode(/** @scrutinizer ignore-type */ $feed->getSelfLink(), false);

        if ($feed->rowCount != null) {
            $this->xmlWriter->startElementNs(
                ODataConstants::ODATA_METADATA_NAMESPACE_PREFIX,
                ODataConstants::ROWCOUNT_ELEMENT,
                null
            );
            $this->xmlWriter->text($feed->rowCount);
            $this->xmlWriter->endElement();
        }

        foreach ($feed->entries as $entry) {
            $this->writeEntry($entry);
        }

        if ($feed->nextPageLink != null) {
            $this->writeLinkNode($feed->nextPageLink, false);
        }
        $this->xmlWriter->endElement();

        return $this;
    }

    /**
     * Function to write base uri and default namespaces for top level elements.
     *
     * @return AtomODataWriter
     */
    public function writeBaseUriAndDefaultNamespaces()
    {
        $this->xmlWriter->writeAttribute(
            ODataConstants::XML_BASE_ATTRIBUTE_NAME_WITH_PREFIX,
            $this->baseUri
        );
        $this->xmlWriter->writeAttributeNs(
            ODataConstants::XMLNS_NAMESPACE_PREFIX,
            ODataConstants::ODATA_NAMESPACE_PREFIX,
            null,
            ODataConstants::ODATA_NAMESPACE
        );
        $this->xmlWriter->writeAttributeNs(
            ODataConstants::XMLNS_NAMESPACE_PREFIX,
            ODataConstants::ODATA_METADATA_NAMESPACE_PREFIX,
            null,
            ODataConstants::ODATA_METADATA_NAMESPACE
        );
        $this->xmlWriter->writeAttribute(
            ODataConstants::XMLNS_NAMESPACE_PREFIX,
            ODataConstants::ATOM_NAMESPACE
        );

        return $this;
    }

    /**
     * Function to create element with one attribute and value.
     *
     * @param string $node           Element name
     * @param string $attribute      Attribute name
     * @param string $attributeValue Attribute value
     * @param string $nodeValue      Element value
     *
     * @return AtomODataWriter
     */
    public function writeNodeAttributeValue(
        $node,
        $attribute,
        $attributeValue,
        $nodeValue
    ) {
        $this->xmlWriter->startElement($node);
        $this->xmlWriter->writeAttribute($attribute, $attributeValue);
        $this->xmlWriter->text($nodeValue ?? '');
        $this->xmlWriter->endElement();

        return $this;
    }

    /**
     * Get update timestamp.
     *
     * @return \DateTime
     */
    public function getUpdated()
    {
        return $this->updated;
    }

    /**
     * Write top level entry.
     *
     * @param ODataEntry $entry      Object of ODataEntry
     * @param bool       $isTopLevel
     *
     * @throws Exception
     * @return AtomODataWriter
     */
    protected function writeEntry(ODataEntry $entry, $isTopLevel = false)
    {
        $this->writeBeginEntry($entry, $isTopLevel);
        foreach ($entry->links as $link) {
            $this->writeLink($link);
        }

        $this
            ->preWriteProperties($entry)
            ->writeProperties($entry->propertyContent)
            ->postWriteProperties($entry);

        $this->xmlWriter->endElement();

        return $this;
    }

    /**
     * Start writing a entry.
     *
     * @param ODataEntry $entry      Entry to write
     * @param bool       $isTopLevel
     *
     * @return AtomODataWriter
     */
    protected function writeBeginEntry(ODataEntry $entry, $isTopLevel)
    {
        $this->xmlWriter->startElement(ODataConstants::ATOM_ENTRY_ELEMENT_NAME);
        if ($isTopLevel) {
            $this->writeBaseUriAndDefaultNamespaces();
        }

        if (null !== $entry->eTag) {
            $this->xmlWriter->startAttributeNs(
                ODataConstants::ODATA_METADATA_NAMESPACE_PREFIX,
                ODataConstants::ATOM_ETAG_ATTRIBUTE_NAME,
                null
            );
            $this->xmlWriter->text($entry->eTag);
            $this->xmlWriter->endAttribute();
        }

        $effectiveTitle = $entry->getTitle()->getTitle();
        $this
            ->writeNodeValue(ODataConstants::ATOM_ID_ELEMENT_NAME, $entry->id)
            ->writeNodeAttributeValue(
                ODataConstants::ATOM_TITLE_ELELMET_NAME,
                ODataConstants::ATOM_TYPE_ATTRIBUTE_NAME,
                MimeTypes::MIME_TEXTTYPE,
                $effectiveTitle
            )
            ->writeNodeValue(ODataConstants::ATOM_UPDATED_ELEMENT_NAME, $this->getUpdated()->format(DATE_ATOM));

        $this->xmlWriter->startElement(ODataConstants::ATOM_AUTHOR_ELEMENT_NAME);
        $this->xmlWriter->startElement(ODataConstants::ATOM_NAME_ELEMENT_NAME);
        $this->xmlWriter->endElement();
        $this->xmlWriter->endElement();


        $this->xmlWriter->startElement(ODataConstants::ATOM_LINK_ELEMENT_NAME);
        $this->xmlWriter->startAttribute(ODataConstants::ATOM_LINK_RELATION_ATTRIBUTE_NAME);
        $this->xmlWriter->text(ODataConstants::ATOM_EDIT_RELATION_ATTRIBUTE_VALUE);
        $this->xmlWriter->endAttribute();
        $this->xmlWriter->startAttribute(ODataConstants::ATOM_TITLE_ELELMET_NAME);
        $this->xmlWriter->text(strval($effectiveTitle));
        $this->xmlWriter->endAttribute();
        $this->xmlWriter->startAttribute(ODataConstants::ATOM_HREF_ATTRIBUTE_NAME);
        if (null === $entry->editLink || is_string($entry->editLink)) {
            $this->xmlWriter->text(strval($entry->editLink));
        } else {
            $this->xmlWriter->text($entry->editLink->getUrl());
        }
        $this->xmlWriter->endAttribute();

        $this->xmlWriter->endElement();


        if ($entry->isMediaLinkEntry) {
            $this->xmlWriter->startElement(ODataConstants::ATOM_LINK_ELEMENT_NAME);
            if ($entry->mediaLink->eTag != null) {
                $this->xmlWriter->startAttributeNs(
                    ODataConstants::ODATA_METADATA_NAMESPACE_PREFIX,
                    ODataConstants::ATOM_ETAG_ATTRIBUTE_NAME,
                    null
                );
                $this->xmlWriter->text(strval($entry->mediaLink->eTag));
                $this->xmlWriter->endAttribute();
            }
            $this->xmlWriter->startAttribute(
                ODataConstants::ATOM_LINK_RELATION_ATTRIBUTE_NAME
            );
            $this->xmlWriter->text(ODataConstants::ATOM_EDIT_MEDIA_RELATION_ATTRIBUTE_VALUE);
            $this->xmlWriter->endAttribute();

            $this->xmlWriter->startAttribute(ODataConstants::ATOM_TYPE_ATTRIBUTE_NAME);
            $this->xmlWriter->text($entry->mediaLink->contentType);
            $this->xmlWriter->endAttribute();

            $this->xmlWriter->startAttribute(ODataConstants::ATOM_TITLE_ELELMET_NAME);
            $this->xmlWriter->text($entry->mediaLink->name);
            $this->xmlWriter->endAttribute();

            $this->xmlWriter->startAttribute(ODataConstants::ATOM_HREF_ATTRIBUTE_NAME);
            $this->xmlWriter->text($entry->mediaLink->editLink);
            $this->xmlWriter->endAttribute();
            $this->xmlWriter->endElement();


            foreach ($entry->mediaLinks as $mediaLink) {
                $this->xmlWriter->startElement(ODataConstants::ATOM_LINK_ELEMENT_NAME);
                if ($mediaLink->eTag != null) {
                    $this->xmlWriter->startAttributeNs(
                        ODataConstants::ODATA_METADATA_NAMESPACE_PREFIX,
                        ODataConstants::ATOM_ETAG_ATTRIBUTE_NAME,
                        null
                    );
                    $this->xmlWriter->text($mediaLink->eTag);
                    $this->xmlWriter->endAttribute();
                }
                $this->xmlWriter->startAttribute(ODataConstants::ATOM_LINK_RELATION_ATTRIBUTE_NAME);
                $this->xmlWriter->text($mediaLink->rel);
                $this->xmlWriter->endAttribute();

                $this->xmlWriter->startAttribute(ODataConstants::ATOM_TYPE_ATTRIBUTE_NAME);
                $this->xmlWriter->text($mediaLink->contentType);
                $this->xmlWriter->endAttribute();

                $this->xmlWriter->startAttribute(ODataConstants::ATOM_TITLE_ELELMET_NAME);
                $this->xmlWriter->text($mediaLink->name);
                $this->xmlWriter->endAttribute();

                $this->xmlWriter->startAttribute(ODataConstants::ATOM_HREF_ATTRIBUTE_NAME);
                $this->xmlWriter->text($mediaLink->editLink);
                $this->xmlWriter->endAttribute();
                $this->xmlWriter->endElement();
            }
        }

        return $this;
    }

    /**
     * @param ODataLink $link Link to write
     *
     * @throws Exception
     * @return AtomODataWriter
     */
    protected function writeLink(ODataLink $link)
    {
        $this->writeLinkNode($link, $link->isExpanded());

        if ($link->isExpanded()) {
            $this->xmlWriter->startElementNs(
                ODataConstants::ODATA_METADATA_NAMESPACE_PREFIX,
                ODataConstants::ATOM_INLINE_ELEMENT_NAME,
                null
            );

            if (null !== $link->getExpandedResult() && null != $link->getExpandedResult()->getData()) {
                if ($link->isCollection()) {
                    $this->writeFeed($link->getExpandedResult()->getFeed());
                } else {
                    $this->writeEntry($link->getExpandedResult()->getEntry());
                }
            }

            $this->xmlWriter->endElement();
            $this->xmlWriter->endElement();
        }

        return $this;
    }

    /**
     * Write after last property.
     *
     * @param ODataEntry $entry Entry object to post writing properties
     *
     * @return AtomODataWriter
     */
    public function postWriteProperties(ODataEntry $entry)
    {
        if (true !== $entry->isMediaLinkEntry) {
            $this->xmlWriter->endElement();
        }
        $this->xmlWriter->endElement();

        return $this;
    }

    /**
     * Write the node which hold the entity properties as child.
     *
     * @param ODataEntry $entry ODataEntry object for pre writing properties
     *
     * @return AtomODataWriter
     */
    public function preWriteProperties(ODataEntry $entry)
    {
        $effectiveType = $entry->type instanceof ODataCategory ? $entry->type->getTerm() : $entry->type;
        $this->xmlWriter->startElement(ODataConstants::ATOM_CATEGORY_ELEMENT_NAME);
        $this->xmlWriter->writeAttribute(
            ODataConstants::ATOM_CATEGORY_TERM_ATTRIBUTE_NAME,
            strval($effectiveType)
        );
        $this->xmlWriter->writeAttribute(
            ODataConstants::ATOM_CATEGORY_SCHEME_ATTRIBUTE_NAME,
            ODataConstants::ODATA_SCHEME_NAMESPACE
        );
        $this->xmlWriter->endElement();
        $this->xmlWriter->startElement(ODataConstants::ATOM_CONTENT_ELEMENT_NAME);
        if ($entry->isMediaLinkEntry) {
            $this->xmlWriter->writeAttribute(
                ODataConstants::ATOM_TYPE_ATTRIBUTE_NAME,
                $entry->mediaLink->contentType
            );
            $this->xmlWriter->writeAttribute(
                ODataConstants::ATOM_CONTENT_SRC_ATTRIBUTE_NAME,
                strval($entry->mediaLink->srcLink)
            );
            $this->xmlWriter->endElement();
            $this->xmlWriter->startElementNs(
                ODataConstants::ODATA_METADATA_NAMESPACE_PREFIX,
                ODataConstants::ATOM_PROPERTIES_ELEMENT_NAME,
                null
            );
        } else {
            $this->xmlWriter->writeAttribute(
                ODataConstants::ATOM_TYPE_ATTRIBUTE_NAME,
                MimeTypes::MIME_APPLICATION_XML
            );
            $this->xmlWriter->startElementNs(
                ODataConstants::ODATA_METADATA_NAMESPACE_PREFIX,
                ODataConstants::ATOM_PROPERTIES_ELEMENT_NAME,
                null
            );
        }

        return $this;
    }

    /**
     * Get the final result as string.
     *
     * @return string output of requested data in Atom format
     */
    public function getOutput()
    {
        $this->xmlWriter->endDocument();

        return $this->xmlWriter->outputMemory(true);
    }

    /**
     * @param ProvidersWrapper $providers
     *
     * @throws ODataException
     * @return IODataWriter
     */
    public function writeServiceDocument(ProvidersWrapper $providers)
    {
        $writer = $this->xmlWriter;
        $writer->startElementNs(
            null,
            ODataConstants::ATOM_PUBLISHING_SERVICE_ELEMENT_NAME,
            ODataConstants::APP_NAMESPACE
        );
        $writer->writeAttributeNs(
            ODataConstants::XML_NAMESPACE_PREFIX,
            ODataConstants::XML_BASE_ATTRIBUTE_NAME,
            null,
            $this->baseUri
        );
        $writer->writeAttributeNs(
            ODataConstants::XMLNS_NAMESPACE_PREFIX,
            self::ATOM_NAMESPACE_PREFIX,
            null,
            ODataConstants::ATOM_NAMESPACE
        );
        //$writer->writeAttributeNs(
        //ODataConstants::XMLNS_NAMESPACE_PREFIX,
        //self::APP_NAMESPACE_PREFIX,
        //null,
        //ODataConstants::APP_NAMESPACE
        //);

        $writer->startElement(ODataConstants::ATOM_PUBLISHING_WORKSPACE_ELEMNT_NAME);
        $writer->startElementNs(self::ATOM_NAMESPACE_PREFIX, ODataConstants::ATOM_TITLE_ELELMET_NAME, null);
        $writer->text(ODataConstants::ATOM_PUBLISHING_WORKSPACE_DEFAULT_VALUE);
        $writer->endElement();
        foreach ($providers->getResourceSets() as $resourceSetWrapper) {
            $name = $resourceSetWrapper->getName();
            $this->writeServiceDocumentNode($writer, $name);
        }
        foreach ($providers->getSingletons() as $single) {
            $name = $single->getName();
            //start collection node
            $this->writeServiceDocumentNode($writer, $name);
        }

        //End workspace and service nodes
        $writer->endElement();
        $writer->endElement();

        return $this;
    }

    /**
     * @param XMLWriter $writer
     * @param $name
     */
    private function writeServiceDocumentNode(&$writer, $name)
    {
        //start collection node
        $writer->startElement(ODataConstants::ATOM_PUBLISHING_COLLECTION_ELEMENT_NAME);
        $writer->writeAttribute(ODataConstants::ATOM_HREF_ATTRIBUTE_NAME, $name);
        //start title node
        $writer->startElementNs(self::ATOM_NAMESPACE_PREFIX, ODataConstants::ATOM_TITLE_ELELMET_NAME, null);
        $writer->text($name);
        //end title node
        $writer->endElement();
        //end collection node
        $writer->endElement();
    }
}

Algo-Web / POData

Pull Request — master (#269)

AtomODataWriter::__construct() A

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