add project statistics information to projects api (#192)

* add project statistics information to Project model

src/main/java/org/gitlab4j/api/models/Project.java

@@ -85,6 +85,7 @@ public class Project {
     private String webUrl;
     private Boolean wikiEnabled;
     private Boolean printingMergeRequestLinkEnabled;
+    private ProjectStatistics statistics;
 
     public Integer getApprovalsBeforeMerge() {
         return approvalsBeforeMerge;
@@ -592,7 +593,16 @@ public class Project {
         return (this);
     }
 
+    public ProjectStatistics getStatistics() {
+        return statistics;
+    }
+
+    public void setStatistics(ProjectStatistics statistics) {
+        this.statistics = statistics;
+    }
+
     public static final boolean isValid(Project project) {
         return (project != null && project.getId() != null);
     }
+
 }

src/main/java/org/gitlab4j/api/models/ProjectStatistics.java

+package org.gitlab4j.api.models;
+
+
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+
+/**
+ * contains sizing information from the project.
+ * To get this information, the project api has to be called with parameter statistics=true 
+ * which is only allowed for gitlab admins.
+ *
+ * Example json from projects api response:
+ * https://<gitlab>/api/v4//projects?statistics=true
+ *
+ * "statistics": {
+ *       "commit_count": 37,
+ *       "storage_size": 1038090,
+ *       "repository_size": 1038090,
+ *       "lfs_objects_size": 0,
+ *       "job_artifacts_size": 0
+ *     }
+ */
+@XmlAccessorType(XmlAccessType.FIELD)
+public class ProjectStatistics {
+
+    long commitCount;
+    long storageSize;
+    long lfsObjectSize;
+    long jobArtifactsSize;
+
+    public long getCommitCount() {
+        return commitCount;
+    }
+
+    public long getJobArtifactsSize() {
+        return jobArtifactsSize;
+    }
+
+    public long getLfsObjectSize() {
+        return lfsObjectSize;
+    }
+
+    public long getStorageSize() {
+        return storageSize;
+    }
+
+    public void setCommitCount(long commitCount) {
+        this.commitCount = commitCount;
+    }
+
+    public void setJobArtifactsSize(long jobArtifactsSize) {
+        this.jobArtifactsSize = jobArtifactsSize;
+    }
+
+    public void setLfsObjectSize(long lfsObjectSize) {
+        this.lfsObjectSize = lfsObjectSize;
+    }
+
+    public void setStorageSize(long storageSize) {
+        this.storageSize = storageSize;
+    }
+}

src/test/java/org/gitlab4j/api/TestProjectApi.java

@@ -279,6 +279,23 @@ public class TestProjectApi {
         assertEquals(TEST_PROJECT_NAME_1, projects.get(1).getName());
     }
 
+
+    @Test
+    public void testListProjectsWithStatistics() throws GitLabApiException {
+
+        List<Project> projects = gitLabApi.getProjectApi().getProjects(false, null,
+                Constants.ProjectOrderBy.NAME, Constants.SortOrder.DESC, null, false, false, false, false, true);
+        assertNotNull(projects);
+        assertTrue(projects.size() >= 2);
+
+        assertNotNull(projects.get(0).getStatistics());
+        assertNotNull(projects.get(0).getStatistics().getLfsObjectSize());
+        assertNotNull(projects.get(0).getStatistics().getCommitCount());
+        assertNotNull(projects.get(0).getStatistics().getJobArtifactsSize());
+        assertNotNull(projects.get(0).getStatistics().getStorageSize());
+
+    }
+
     @Test
     public void testListProjectsWithParamsViaPager() throws GitLabApiException {