Add routes, controller, and view template for dataset description

See #134

app/controllers/HomeController.java

@@ -245,15 +245,36 @@ private Result result(String content, String contentType) {
 
 	public Result context() {
 		response().setHeader("Access-Control-Allow-Origin", "*");
+		return ok(readFile(config("context.file"))).as(config("context.content"));
+	}
+
+	/**
+	 * See https://www.w3.org/TR/dwbp/#metadata
+	 * 
+	 * @param format
+	 *            The format ("jsonld" or "")
+	 * 
+	 * @return JSON-LD dataset metadata
+	 */
+	public Result dataset(String format) {
+		response().setHeader("Access-Control-Allow-Origin", "*");
+		Format responseFormat = Accept.formatFor(format, request().acceptedTypes());
+		String content = readFile(config("dataset.file"));
+		return responseFormat.queryParamString.startsWith("json") ? //
+				ok(content).as(config("dataset.content")) : //
+				ok(views.html.dataset.render(Json.parse(content)));
+	}
+
+	private String readFile(String name) {
 		try {
-			File file = env.getFile(config("context.file"));
+			File file = env.getFile(name);
 			Path path = Paths.get(file.getAbsolutePath());
-			return ok(Files.readAllLines(path).stream().collect(Collectors.joining("\n")))
-					.as(config("context.content"));
+			String content = Files.readAllLines(path).stream().collect(Collectors.joining("\n"));
+			return content;
 		} catch (IOException e) {
-			e.printStackTrace();
+			Logger.error("Couldn't get: " + name, e);
+			return null;
 		}
-		return null;
 	}
 
 	public Result gnd(String id) {

app/views/dataset.scala.html

@@ -0,0 +1,50 @@
+@* Copyright 2014-2018 Fabian Steeg, hbz. Licensed under the GPLv2 *@
+
+@(json: com.fasterxml.jackson.databind.JsonNode)
+
+@import helper._
+
+@main("", "Dataset: lobid-gnd") { 
+	<h3>Datenbeschreibung<small><a title="Beschreibung als JSON-LD anzeigen" href='@routes.HomeController.dataset("json")'><img class='json-ld-icon' src='@routes.Assets.versioned("images/json-ld.png")'></a></small></h3>
+	<table class="table table-striped">
+		<tr><th width="20%"/><th width="80%"/></tr>
+		<tr>
+			<td>Titel</td>
+			<td><a href='@json.get("id").asText()'>
+				@json.get("name").get("de").asText() &mdash; @json.get("alternateName").get("de").asText()
+			</a></td>
+		</tr>
+		<tr><td>Beschreibung</td><td>@Html(json.get("description").get("de").asText())</td></tr>
+		<tr>
+			<td>Schlagwörter</td>
+			<td>@json.get("keywords").toString().replaceAll("\",\"", ", ").replaceAll("[\"\\[\\]]", "")</td>
+		</tr>
+		@defining(json.get("publisher")) { pub =>
+		<tr>
+			<td>Veröffentlicht von</td>
+			<td><a href='@pub.get("id").asText()'>
+				@pub.get("name").get("de").asText() &mdash; @pub.get("alternateName").elements().next().asText()
+			</a></td>
+		</tr>
+		}
+		<tr><td>Basiert auf</td><td><a href='@json.get("isBasedOn").get("url").asText()'>@json.get("isBasedOn").get("name").get("de").asText()</a></td></tr>
+		<tr><td>Veröffentlicht am</td><td>@json.get("datePublished").asText()</td></tr>
+		<tr><td>Sprache</td><td>@json.get("inLanguage").elements().next().asText()</td></tr>
+		<tr><td>Ergänzungsfrequenz</td><td>@json.get("accrualPeriodicity").get("name").get("de").asText()</td></tr>
+		<tr><td>Kontakt</td><td><a href='@json.get("contactPoint").asText()'>@json.get("contactPoint").asText()</a></td></tr>
+	</table>
+	<h3>Datendistribution</h3>
+	@defining(json.get("distribution").elements().next()) { dist =>
+	<table class="table table-striped">
+		<tr><th width="20%"/><th width="80%"/></tr>
+		<tr><td>Titel</td><td>@dist.get("name").get("de").asText()</td></tr>
+		<tr><td>Beschreibung</td><td>@Html(dist.get("description").get("de").asText())</td></tr>
+		<tr><td>URL</td><td><a href='@dist.get("url").asText()'>@dist.get("url").asText()</a></td></tr>
+		<tr><td>Lizenz</td><td><a href='@dist.get("license").asText()'>@dist.get("license").asText()</a></td></tr>
+		<tr><td>Medientypen</td><td>@dist.get("encodingFormat").toString().replaceAll("\",\"", ", ").replaceAll("[\"\\[\\]]", "")</td></tr>
+	</table>
+	}
+	<script type="application/ld+json">
+	@Html(json.toString)
+	</script>
+}

app/views/main.scala.html

@@ -59,6 +59,9 @@
                           <li @if(title=="lobid-gnd - API"){class="active"}>
                             <a href="@routes.HomeController.api()" title="Programmierschnittstelle">Programmierschnittstelle (API)</a>
                           </li>
+                          <li @if(title=="Dataset: lobid-gnd"){class="active"}>
+                            <a href='@routes.HomeController.dataset("")'>Datenbeschreibung</a>
+                          </li>
                           <li class="divider"></li>
                           <li class="dropdown-header">Kontakt</li>
                           <li><a href="mailto:semweb@@hbz-nrw.de?subject=Feedback%20zu%20lobid-gnd,%20aktuelle%20URL%[email protected]()">Feedback zur aktuellen Seite</a></li>

conf/application.conf

@@ -47,6 +47,11 @@ context {
 	prod: "http://lobid.org/gnd/context.jsonld"
 }
 
+dataset {
+	file: "conf/dataset.jsonld"
+	content: "application/ld+json; charset=utf-8"
+}
+
 topLevelTypes : [
 	AuthorityResource,
 	CorporateBody,

conf/routes

@@ -16,6 +16,9 @@ GET     /gnd/api            controllers.HomeController.api
 
 GET     /gnd/context.jsonld controllers.HomeController.context()
 
+GET     /gnd/dataset.jsonld controllers.HomeController.dataset(format="json")
+GET     /gnd/dataset        controllers.HomeController.dataset(format?="")
+
 GET     /gnd/search         controllers.HomeController.search(q ?= "", filter ?= "", from: Int ?= 0, size: Int ?= 10, format ?= null)
 
 GET     /gnd/:id.:format    controllers.HomeController.authorityDotFormat(id, format)

public/stylesheets/main.css

@@ -236,4 +236,10 @@ figcaption {
 	max-width: 100%;
 	max-height: 300px;
 	float: right;
+}
+
+.json-ld-icon {
+	margin-left: 1px;
+	float:right;
+	height: 1.4em
 }

test/controllers/AcceptIntegrationTest.java

@@ -37,6 +37,13 @@ public class AcceptIntegrationTest extends IndexTest {
 	public static Collection<Object[]> data() {
 		// @formatter:off
 		return Arrays.asList(new Object[][] {
+			// service meta data: context and dataset description
+			{ fakeRequest(GET, "/gnd/context.jsonld"), /*->*/ "application/ld+json" },
+			{ fakeRequest(GET, "/gnd/dataset.jsonld"), /*->*/ "application/ld+json" },
+			{ fakeRequest(GET, "/gnd/dataset"), /*->*/ "application/ld+json" },
+			{ fakeRequest(GET, "/gnd/dataset").header("Accept", "text/html"), /*->*/ "text/html" },
+			{ fakeRequest(GET, "/gnd/dataset").header("Accept", "application/ld+json"), /*->*/ "application/ld+json" },
+			{ fakeRequest(GET, "/gnd/dataset").header("Accept", "application/json"), /*->*/ "application/ld+json" },
 			// search, default format: JSON
 			{ fakeRequest(GET, "/gnd/search?q=*"), /*->*/ "application/json" },
 			{ fakeRequest(GET, "/gnd/search?q=*").header("Accept", "*/*"), /*->*/ "application/json" },