Add helm validator sources

Issue-ID: SDC-3185
Signed-off-by: Remigiusz Janeczek <remigiusz.janeczek@nokia.com>
Change-Id: I32dea3b4294a90c4dfc75864fb4200f044e7a0b6

1 files changed, 65 insertions, 0 deletions

diff --git a/src/main/java/org/onap/sdc/helmvalidator/helm/versions/SupportedVersionsProvider.java b/src/main/java/org/onap/sdc/helmvalidator/helm/versions/SupportedVersionsProvider.java
new file mode 100644
index 0000000..ff1cdde
--- /dev/null
+++ b/src/main/java/org/onap/sdc/helmvalidator/helm/versions/SupportedVersionsProvider.java
@@ -0,0 +1,65 @@
+/*
+ * ============LICENSE_START=======================================================
+ * SDC-HELM-VALIDATOR
+ * ================================================================================
+ * Copyright (C) 2021 Nokia. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.sdc.helmvalidator.helm.versions;
+
+import java.util.Comparator;
+import java.util.List;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+import org.onap.sdc.helmvalidator.helm.validation.exception.NotSupportedVersionException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class SupportedVersionsProvider {
+
+    private final SystemEnvVersionsReader versionsReader;
+
+    @Autowired
+    public SupportedVersionsProvider(SystemEnvVersionsReader versionsReader) {
+        this.versionsReader = versionsReader;
+    }
+
+    /**
+     * Retrieves list of available Helm client versions.
+     *
+     * @return list of available Helm client versions
+     */
+    public List<String> getVersions() {
+        return versionsReader.readVersions().stream()
+            .filter(Predicate.not(String::isBlank))
+            .sorted(Comparator.reverseOrder())
+            .collect(Collectors.toList());
+    }
+
+    /**
+     * Retrieves latest available Helm client with given major version.
+     *
+     * @param helmMajorVersion major version of Helm client
+     * @return latest available Helm client with given major version
+     */
+    public String getLatestVersion(String helmMajorVersion) {
+        return getVersions().stream()
+            .filter(supportedVersion -> supportedVersion.startsWith(helmMajorVersion + "."))
+            .findFirst()
+            .orElseThrow(() -> new NotSupportedVersionException(helmMajorVersion));
+    }
+}