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Issue 944: Pull hOCR from separate media in IIIF manifest.

pull/952/head
Alexander O'Neill 1 year ago committed by Seth Shaw
parent
aa4d10649b
commit
8f5154c24e
1 changed files with 115 additions and 75 deletions
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  1. 190
      modules/islandora_iiif/src/Plugin/views/style/IIIFManifest.php

190
modules/islandora_iiif/src/Plugin/views/style/IIIFManifest.php
Unescape View File

@ -2,22 +2,23 @@
namespace Drupal\islandora_iiif\Plugin\views\style;
use Drupal\views\Plugin\views\style\StylePluginBase;
use Drupal\Core\Config\ImmutableConfig;
use Drupal\Core\File\FileSystemInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Extension\ModuleHandlerInterface;
use Drupal\Core\Field\FieldItemInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Messenger\MessengerInterface;
use Drupal\Core\Url;
use Drupal\islandora\IslandoraUtils;
use Drupal\views\Plugin\views\style\StylePluginBase;
use Drupal\views\ResultRow;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Serializer\SerializerInterface;
use Symfony\Component\HttpFoundation\Request;
use Drupal\Core\Config\ImmutableConfig;
use Drupal\Core\File\FileSystemInterface;
use GuzzleHttp\Client;
use GuzzleHttp\Exception\ClientException;
use GuzzleHttp\Exception\ConnectException;
use GuzzleHttp\Exception\ServerException;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Serializer\SerializerInterface;
use Symfony\Component\HttpFoundation\Request;
/**
* Provide serializer format for IIIF Manifest.
@ -33,6 +34,13 @@ use GuzzleHttp\Exception\ServerException;
*/
class IIIFManifest extends StylePluginBase {
/**
* Islandora utility functions.
*
* @var \Drupal\islandora\IslandoraUtils
*/
protected $utils;
/**
* {@inheritdoc}
*/
@ -92,17 +100,10 @@ class IIIFManifest extends StylePluginBase {
*/
protected $messenger;
/**
* Module Handler for running hooks.
*
* @var \Drupal\Core\Extention\ModuleHandlerInterface
*/
protected $moduleHandler;
/**
* {@inheritdoc}
*/
public function __construct(array $configuration, $plugin_id, $plugin_definition, SerializerInterface $serializer, Request $request, ImmutableConfig $iiif_config, EntityTypeManagerInterface $entity_type_manager, FileSystemInterface $file_system, Client $http_client, MessengerInterface $messenger, ModuleHandlerInterface $moduleHandler) {
public function __construct(array $configuration, $plugin_id, $plugin_definition, SerializerInterface $serializer, Request $request, ImmutableConfig $iiif_config, EntityTypeManagerInterface $entity_type_manager, FileSystemInterface $file_system, Client $http_client, MessengerInterface $messenger, IslandoraUtils $utils) {
parent::__construct($configuration, $plugin_id, $plugin_definition);
$this->serializer = $serializer;
@ -112,7 +113,8 @@ class IIIFManifest extends StylePluginBase {
$this->fileSystem = $file_system;
$this->httpClient = $http_client;
$this->messenger = $messenger;
$this->moduleHandler = $moduleHandler;
$this->utils = $utils;
}
/**
@ -130,20 +132,10 @@ class IIIFManifest extends StylePluginBase {
$container->get('file_system'),
$container->get('http_client'),
$container->get('messenger'),
$container->get('module_handler')
$container->get('islandora.utils')
);
}
/**
* Return the request property.
*
* @return \Symfony\Component\HttpFoundation\Request
* The Symfony request object
*/
public function getRequest() {
return $this->request;
}
/**
* {@inheritdoc}
*/
@ -161,6 +153,11 @@ class IIIFManifest extends StylePluginBase {
$content_path = implode('/', $url_components);
$iiif_base_id = $request_host . '/' . $content_path;
/**
* @var \Drupal\taxonomy\TermInterface|null
*/
$structured_text_term = $this->utils->getTermForUri($this->options['structured_text_term_uri']);
// @see https://iiif.io/api/presentation/2.1/#manifest
$json += [
'@type' => 'sc:Manifest',
@ -180,7 +177,7 @@ class IIIFManifest extends StylePluginBase {
// For each row in the View result.
foreach ($this->view->result as $row) {
// Add the IIIF URL to the image to print out as JSON.
$canvases = $this->getTileSourceFromRow($row, $iiif_address, $iiif_base_id);
$canvases = $this->getTileSourceFromRow($row, $iiif_address, $iiif_base_id, $structured_text_term);
foreach ($canvases as $tile_source) {
$json['sequences'][0]['canvases'][] = $tile_source;
}
@ -190,9 +187,6 @@ class IIIFManifest extends StylePluginBase {
$content_type = 'json';
// Give other modules a chance to alter the manifest.
$this->moduleHandler->alter('islandora_iiif_manifest', $json, $this);
return $this->serializer->serialize($json, $content_type, ['views_style_plugin' => $this]);
}
@ -206,18 +200,41 @@ class IIIFManifest extends StylePluginBase {
* @param string $iiif_base_id
* The URL for the request, minus the last part of the URL,
* which is likely "manifest".
* @param \Drupal\taxonomy\TermInterface|null $structured_text_term
* The term that structured text media references, if any.
*
* @return array
* List of IIIF URLs to display in the Openseadragon viewer.
*/
protected function getTileSourceFromRow(ResultRow $row, $iiif_address, $iiif_base_id) {
protected function getTileSourceFromRow(ResultRow $row, $iiif_address, $iiif_base_id, $structured_text_term) {
$canvases = [];
foreach (array_filter(array_values($this->options['iiif_tile_field'])) as $iiif_tile_field) {
$viewsField = $this->view->field[$iiif_tile_field];
$iiif_ocr_file_field = !empty($this->options['iiif_ocr_file_field']) ? array_filter(array_values($this->options['iiif_ocr_file_field'])) : [];
$ocrField = count($iiif_ocr_file_field) > 0 ? $this->view->field[$iiif_ocr_file_field[0]] : NULL;
$entity = $viewsField->getEntity($row);
if ($ocrField) {
$ocr_entity = $entity;
$ocr_field_name = $ocrField->definition['field_name'];
if (!is_null($ocrField_name)) {
$ocrs = $ocr_entity->{$ocr_field_name};
$ocr = isset($ocrs[$i]) ? $ocrs[$i] : FALSE;
$ocr_url = $ocr->entity->createFileUrl(FALSE);
}
}
else if ($structured_text_term) {
$parent_node = $this->utils->getParentNode($entity);
$ocr_entity_array = $this->utils->getMediaReferencingNodeAndTerm($parent_node, $structured_text_term);
$ocr_entity_id = is_array($ocr_entity_array) ? array_shift($ocr_entity_array) : NULL;
$ocr_entity = $ocr_entity_id ? $this->entityTypeManager->getStorage('media')->load($ocr_entity_id) : NULL;
$ocr_file_source = $ocr_entity ? $ocr_entity->getSource() : NULL;
$ocr_fid = $ocr_file_source->getSourceFieldValue($ocr_entity);
$ocr_file = $this->entityTypeManager->getStorage('file')->load($ocr_fid);
$ocr_url = $ocr_file->createFileUrl(FALSE);
}
if (isset($entity->{$viewsField->definition['field_name']})) {
/** @var \Drupal\Core\Field\FieldItemListInterface $images */
@ -228,11 +245,6 @@ class IIIFManifest extends StylePluginBase {
continue;
}
if (!is_null($ocrField)) {
$ocrs = $entity->{$ocrField->definition['field_name']};
$ocr = isset($ocrs[$i]) ? $ocrs[$i] : FALSE;
}
// Create the IIIF URL for this file
// Visiting $iiif_url will resolve to the info.json for the image.
$file_url = $image->entity->createFileUrl(FALSE);
@ -243,35 +255,8 @@ class IIIFManifest extends StylePluginBase {
$canvas_id = $iiif_base_id . '/canvas/' . $entity->id();
$annotation_id = $iiif_base_id . '/annotation/' . $entity->id();
// Try to fetch the IIIF metadata for the image.
try {
$info_json = $this->httpClient->get($iiif_url)->getBody();
$resource = json_decode($info_json, TRUE);
$width = $resource['width'];
$height = $resource['height'];
}
catch (ClientException | ServerException | ConnectException $e) {
// If we couldn't get the info.json from IIIF
// try seeing if we can get it from Drupal.
if (empty($width) || empty($height)) {
// Get the image properties so we know the image width/height.
$properties = $image->getProperties();
$width = isset($properties['width']) ? $properties['width'] : 0;
$height = isset($properties['height']) ? $properties['height'] : 0;
// If this is a TIFF AND we don't know the width/height
// see if we can get the image size via PHP's core function.
if ($mime_type === 'image/tiff' && !$width || !$height) {
$uri = $image->entity->getFileUri();
$path = $this->fileSystem->realpath($uri);
$image_size = getimagesize($path);
if ($image_size) {
$width = $image_size[0];
$height = $image_size[1];
}
}
}
}
[$width, $height] = $this->getCanvasDimensions($iiif_url, $image, $mime_type);
$tmp_canvas = [
// @see https://iiif.io/api/presentation/2.1/#canvas
'@id' => $canvas_id,
@ -302,22 +287,15 @@ class IIIFManifest extends StylePluginBase {
],
];
if (isset($ocr) && $ocr != FALSE) {
if ($ocr_url) {
$tmp_canvas['seeAlso'] = [
'@id' => $ocr->entity->createFileUrl(FALSE),
'@id' => $ocr_url,
'format' => 'text/vnd.hocr+html',
'profile' => 'http://kba.cloud/hocr-spec',
'label' => 'hOCR embedded text',
];
}
// Give other modules a chance to alter the canvas.
$alter_options = [
'options' => $this->options,
'views_plugin' => $this,
];
$this->moduleHandler->alter('islandora_iiif_manifest_canvas', $tmp_canvas, $row, $alter_options);
$canvases[] = $tmp_canvas;
}
}
@ -326,6 +304,50 @@ class IIIFManifest extends StylePluginBase {
return $canvases;
}
/**
* Try to fetch the IIIF metadata for the image.
*
* @param string $iiif_url
* Base URL of the canvas
* @param FieldItemInterface $image
* The image field.
* @param string $mime_type
* The mime type of the image.
* @return [string]
* The width and height of the image.
*/
protected function getCanvasDimensions(string $iiif_url, FieldItemInterface $image, string $mime_type) {
try {
$info_json = $this->httpClient->get($iiif_url)->getBody();
$resource = json_decode($info_json, TRUE);
$width = $resource['width'];
$height = $resource['height'];
}
catch (ClientException | ServerException | ConnectException $e) {
// If we couldn't get the info.json from IIIF
// try seeing if we can get it from Drupal.
if (empty($width) || empty($height)) {
// Get the image properties so we know the image width/height.
$properties = $image->getProperties();
$width = isset($properties['width']) ? $properties['width'] : 0;
$height = isset($properties['height']) ? $properties['height'] : 0;
// If this is a TIFF AND we don't know the width/height
// see if we can get the image size via PHP's core function.
if ($mime_type === 'image/tiff' && !$width || !$height) {
$uri = $image->entity->getFileUri();
$path = $this->fileSystem->realpath($uri);
$image_size = getimagesize($path);
if ($image_size) {
$width = $image_size[0];
$height = $image_size[1];
}
}
}
}
return [$width, $height];
}
/**
* Pull a title from the node or media passed to this view.
*
@ -426,6 +448,15 @@ class IIIFManifest extends StylePluginBase {
'#options' => $field_options,
'#required' => FALSE,
];
$form['structured_text_term'] = [
'#type' => 'entity_autocomplete',
'#target_type' => 'taxonomy_term',
'#title' => $this->t('Structured text term'),
'#default_value' => $this->utils->getTermForUri($this->options['structured_text_term_uri']),
'#required' => FALSE,
'#description' => $this->t('Term indicating the media that holds structured text, such as hOCR, for the given object.'),
];
}
/**
@ -438,4 +469,13 @@ class IIIFManifest extends StylePluginBase {
return ['json' => 'json'];
}
public function submitOptionsForm(&$form, FormStateInterface $form_state) {
$style_options = $form_state->getValue('style_options');
$tid = $style_options['structured_text_term'];
$term = $this->entityTypeManager->getStorage('taxonomy_term')->load($tid);
$style_options['structured_text_term_uri'] = $this->utils->getUriForTerm($term);
$form_state->setValue('style_options', $style_options);
parent::submitOptionsForm($form, $form_state);
}
}

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