Add PantryItemLabel with GraphQL query and mutation

1 files changed, 55 insertions, 0 deletions

diff --git a/src/main/java/dev/submelon/view/PantryItemLabelResource.java b/src/main/java/dev/submelon/view/PantryItemLabelResource.java
new file mode 100644
index 0000000..985e96e
--- /dev/null
+++ b/src/main/java/dev/submelon/view/PantryItemLabelResource.java
@@ -0,0 +1,55 @@
+package dev.submelon.view;
+
+import java.util.List;
+import java.util.Optional;
+
+import org.apache.commons.lang3.StringUtils;
+import org.bson.Document;
+import org.eclipse.microprofile.graphql.Description;
+import org.eclipse.microprofile.graphql.GraphQLApi;
+import org.eclipse.microprofile.graphql.Mutation;
+import org.eclipse.microprofile.graphql.Query;
+
+import dev.submelon.model.PantryItemLabel;
+import io.smallrye.mutiny.Multi;
+import io.smallrye.mutiny.Uni;
+
+@GraphQLApi
+public class PantryItemLabelResource {
+
+    @Query("allLabels")
+    @Description("Get all labels that can be assigned to items")
+    public Uni<List<PantryItemLabel>> getItems() {
+        return PantryItemLabel.findAll().list();
+    }
+
+    @Mutation
+    @Description("Create any new labels from list of labels")
+    public Uni<List<PantryItemLabel>> syncLabels(PantryItemLabel[] labels) {
+        return Multi.createFrom().items(labels)
+            .filter(label -> StringUtils.isNotBlank(label.getTitle()))
+            .onItem().transformToUniAndMerge(this::getOrCreateLabel)
+            .collect().asList();
+    }
+
+    private Uni<PantryItemLabel> getOrCreateLabel(PantryItemLabel label) {
+        return findByTitle(label.getTitle())
+            .onItem().transformToUni(opt -> {
+                if (opt.isPresent()) {
+                    return Uni.createFrom().item(opt.get());
+                } else {
+                    return persistNewLabel(label);
+                }
+            });
+    }
+
+    private Uni<Optional<PantryItemLabel>> findByTitle(String title) {
+        return PantryItemLabel
+            .find(new Document("title", title))
+            .firstResultOptional();
+    }
+
+    private Uni<PantryItemLabel> persistNewLabel(PantryItemLabel label) {
+        return PantryItemLabel.persist(label).replaceWith(label);
+    }
+}