Add config links for git, hg and svn

scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/api/v2/resources/SvnConfigInIndexResource.java

@@ -0,0 +1,45 @@
+package sonia.scm.api.v2.resources;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import sonia.scm.config.ConfigurationPermissions;
+import sonia.scm.plugin.Extension;
+import sonia.scm.web.JsonEnricher;
+import sonia.scm.web.JsonEnricherContext;
+import sonia.scm.web.VndMediaType;
+
+import javax.inject.Inject;
+import javax.inject.Provider;
+
+@Extension
+public class SvnConfigInIndexResource implements JsonEnricher {
+
+  private final Provider<ScmPathInfoStore> scmPathInfoStore;
+  private final ObjectMapper objectMapper;
+
+  @Inject
+  public SvnConfigInIndexResource(Provider<ScmPathInfoStore> scmPathInfoStore, ObjectMapper objectMapper) {
+    this.scmPathInfoStore = scmPathInfoStore;
+    this.objectMapper = objectMapper;
+  }
+
+  @Override
+  public void enrich(JsonEnricherContext context) {
+    if (isIndexRequest(context) && ConfigurationPermissions.list().isPermitted()) {
+      String gitConfigUrl = new LinkBuilder(scmPathInfoStore.get().get(), SvnConfigResource.class)
+        .method("get")
+        .parameters()
+        .href();
+
+      ObjectNode gitConfigRefNode = objectMapper.createObjectNode();
+      gitConfigRefNode.set("href", objectMapper.convertValue(gitConfigUrl, JsonNode.class));
+
+      ((ObjectNode) context.getResponseEntity().get("_links")).put("svnConfig", gitConfigRefNode);
+    }
+  }
+
+  private boolean isIndexRequest(JsonEnricherContext context) {
+    return VndMediaType.INDEX.equals(context.getResponseMediaType().toString());
+  }
+}