959-iiif-width-height-caching Islandora IIIF: Add search endpoint con…

…fig to manifest.

modules/islandora_iiif/config/schema/islandora_iiif.schema.yml

@@ -16,3 +16,15 @@ views.style.iiif_manifest:
       type: sequence
       sequence:
         type: string
+      label: "Tile source field(s)"
+    iiif_ocr_file_field:
+      type: sequence
+      sequence:
+        type: string:
+      label: "IIIF hOCR file field"
+    structured_text_term:
+      type: string
+      label: "Structured text term"
+    search_endpoint:
+      type: string
+      label: "Search endpoint path"

modules/islandora_iiif/src/Plugin/views/style/IIIFManifest.php

@@ -215,6 +215,9 @@ public function render() {
 
     $content_type = 'json';
 
+// Add a search endpoint if one is defined
+$this->addSearchEndpoint($json, $url_components);
+
     // Give other modules a chance to alter the manifest.
     $this->moduleHandler->alter('islandora_iiif_manifest', $json, $this);
 
@@ -459,6 +462,23 @@ public function getEntityTitle(string $content_path): string {
     return $entity_title;
   }
 
+  protected function addSearchEndpoint(array &$json, array $url_components) {
+    $url_base = $this->getRequest()->getSchemeAndHttpHost();
+    $hocr_search_path = $this->options['search_endpoint'];
+    $hocr_search_url = $url_base . '/' . ltrim($hocr_search_path, '/');
+
+    $hocr_search_url = str_replace('%node', $url_components[1], $hocr_search_url);
+
+    $json['service'][] = [
+          "@context" => "http://iiif.io/api/search/0/context.json",
+          "@id" => $hocr_search_url,
+          "profile" => "http://iiif.io/api/search/0/search",
+          "label" => t("Search inside this work"),
+    ];
+
+
+  }
+
   /**
    * {@inheritdoc}
    */
@@ -539,6 +559,14 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       '#required' => FALSE,
       '#description' => $this->t('Term indicating the media that holds structured text, such as hOCR, for the given object. Use this if the text is on a separate media from the tile source.'),
     ];
+
+    $form['search_endpoint'] = [
+      '#type' => 'textfield',
+      '#title' => $this->t("Search endpoint path."),
+      '#description' => $this->t("If there is a search endpoint to search within the book that returns IIIF annotations, put it here. Use substitutions %node and %keywords.<br>E.g., paged-content-search/%node?search-in-pages=%keywords"),
+      '#default_value' => $this->options['search_endpoint'],
+      '#required' => FALSE,
+    ];
   }
 
   /**