OZG-5058 create postfach migration

src/main/java/de/ozgcloud/admin/migration/M001_CreateEmptyPostfachIfMissing.java

@@ -3,19 +3,53 @@ package de.ozgcloud.admin.migration;
 import io.mongock.api.annotations.ChangeUnit;
 import io.mongock.api.annotations.Execution;
 import io.mongock.api.annotations.RollbackExecution;
+import org.bson.Document;
 import org.springframework.data.mongodb.core.MongoTemplate;
+import org.springframework.data.mongodb.core.query.Criteria;
+import org.springframework.data.mongodb.core.query.Query;
+
 
 @ChangeUnit(id = "2024-02-20 17:00:00 OZG-4948-OZG-5058", order = "M001", author = "lmonnerjahn", runAlways = true)
-public class M001_CreateEmptyPostfachIfMissing {
+public class M001_CreateEmptyPostfachIfMissing {  // NOSONAR
 	private static final String SETTINGS_COLLECTION = "settings";
 
-	static final String NAME_KEY = "name";
-	static final String POSTFACH_NAME = "Postfach";
+	static final String TYPE_NAME_KEY = "name";
+	static final String TYPE_NAME_POSTFACH_VALUE = "Postfach";
+	public static final String SETTINGS_KEY = "settings";
+	public static final String POSTFACH_ABSENDER_KEY = "absender";
+	public static final String POSTFACH_SIGNATUR_KEY = "signatur";
+	public static final String ABSENDER_NAME_KEY = "name";
+	public static final String ABSENDER_ANSCHRIFT_KEY = "anschrift";
+	public static final String ABSENDER_DIENST_KEY = "dienst";
+	public static final String ABSENDER_MANDANT_KEY = "mandant";
+	public static final String ABSENDER_GEMEINDESCHLUESSEL_KEY = "gemeindeschluessel";
+	public static final String SIGNATUR_TEXT_KEY = "text";
 
 	@Execution
 	public void doMigration(MongoTemplate template) {
-		// todo: check if settings collection contains a "postfach" object
-		// add a postfach object if it is missing
+		var criteria = Criteria.where(TYPE_NAME_KEY).is(TYPE_NAME_POSTFACH_VALUE);
+		var query = new Query(criteria);
+		if(template.find(query, Document.class, SETTINGS_COLLECTION).isEmpty()) {
+			template.save(emptyPostfachSetting(), SETTINGS_COLLECTION);
+		}
+	}
+
+	private Document emptyPostfachSetting(){
+		var setting = new Document();
+		var postfach = new Document();
+		var absender = new Document();
+		var signatur = new Document();
+		signatur.put(SIGNATUR_TEXT_KEY, "");
+		absender.put(ABSENDER_NAME_KEY, "");
+		absender.put(ABSENDER_ANSCHRIFT_KEY, "");
+		absender.put(ABSENDER_DIENST_KEY, "");
+		absender.put(ABSENDER_MANDANT_KEY, "");
+		absender.put(ABSENDER_GEMEINDESCHLUESSEL_KEY, "");
+		postfach.put(POSTFACH_ABSENDER_KEY, absender);
+		postfach.put(POSTFACH_SIGNATUR_KEY, signatur);
+		setting.put(TYPE_NAME_KEY, TYPE_NAME_POSTFACH_VALUE);
+		setting.put(SETTINGS_KEY, postfach);
+		return setting;
 	}
 
 	@RollbackExecution