Mods to support project and issues statistics (#424).

src/main/java/org/gitlab4j/api/IssuesApi.java

@@ -13,6 +13,8 @@ import org.gitlab4j.api.models.Duration;
 import org.gitlab4j.api.models.Issue;
 import org.gitlab4j.api.models.IssueFilter;
 import org.gitlab4j.api.models.IssueLink;
+import org.gitlab4j.api.models.IssuesStatistics;
+import org.gitlab4j.api.models.IssuesStatisticsFilter;
 import org.gitlab4j.api.models.MergeRequest;
 import org.gitlab4j.api.models.Participant;
 import org.gitlab4j.api.models.TimeStats;
@@ -22,6 +24,7 @@ import org.gitlab4j.api.utils.DurationUtils;
  * This class provides an entry point to all the GitLab API Issue calls.
  * @see <a href="https://docs.gitlab.com/ce/api/issues.html">Issues API at GitLab</a>
  * @see <a href="https://docs.gitlab.com/ce/api/issue_links.html">Issue Links API at GitLab</a>
+ * @see <a href="https://docs.gitlab.com/ce/api/issues_statistics.html">Issues Statistics API at GitLab</a>
  */
 public class IssuesApi extends AbstractApi implements Constants {
 
@@ -839,4 +842,52 @@ public class IssuesApi extends AbstractApi implements Constants {
     public Stream<Participant> getParticipantsStream(Object projectIdOrPath, Integer issueIid) throws GitLabApiException {
         return (getParticipants(projectIdOrPath, issueIid, getDefaultPerPage()).stream());
     }
+
+    /**
+     * Gets issues count statistics on all issues the authenticated user has access to. By default it returns
+     * only issues created by the current user. To get all issues, use parameter scope=all.
+     *
+     * <pre><code>GitLab Endpoint: GET /issues_statistics</code></pre>
+     *
+     * @param filter {@link IssuesStatisticsFilter} a IssuesStatisticsFilter instance with the filter settings.
+     * @return an IssuesStatistics instance with the statistics for the matched issues.
+     * @throws GitLabApiException if any exception occurs
+     */
+    public IssuesStatistics getIssuesStatistics(IssuesStatisticsFilter filter) throws GitLabApiException {
+        GitLabApiForm formData = filter.getQueryParams();
+        Response response = get(Response.Status.OK, formData.asMap(), "issues_statistics");
+        return (response.readEntity(IssuesStatistics.class));
+    }
+
+    /**
+     * Gets issues count statistics for given group.
+     *
+     * <pre><code>GitLab Endpoint: GET /groups/:groupId/issues_statistics</code></pre>
+     *
+     * @param groupIdOrPath the group ID, path of the group, or a Group instance holding the group ID or path, required
+     * @param filter {@link IssuesStatisticsFilter} a IssuesStatisticsFilter instance with the filter settings
+     * @return an IssuesStatistics instance with the statistics for the matched issues
+     * @throws GitLabApiException if any exception occurs
+     */
+    public IssuesStatistics getGroupIssuesStatistics(Object groupIdOrPath, IssuesStatisticsFilter filter) throws GitLabApiException {
+        GitLabApiForm formData = filter.getQueryParams();
+        Response response = get(Response.Status.OK, formData.asMap(), "groups", this.getGroupIdOrPath(groupIdOrPath), "issues_statistics");
+        return (response.readEntity(IssuesStatistics.class));
+    }
+
+    /**
+     * Gets issues count statistics for given group.
+     *
+     * <pre><code>GitLab Endpoint: GET /projects/:projectId/issues_statistics</code></pre>
+     *
+     * @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance, required
+     * @param filter {@link IssuesStatisticsFilter} a IssuesStatisticsFilter instance with the filter settings.
+     * @return an IssuesStatistics instance with the statistics for the matched issues
+     * @throws GitLabApiException if any exception occurs
+     */
+    public IssuesStatistics geProjectIssuesStatistics(Object projectIdOrPath, IssuesStatisticsFilter filter) throws GitLabApiException {
+        GitLabApiForm formData = filter.getQueryParams();
+        Response response = get(Response.Status.OK, formData.asMap(), "projects", this.getProjectIdOrPath(projectIdOrPath), "issues_statistics");
+        return (response.readEntity(IssuesStatistics.class));
+    }
 }

src/main/java/org/gitlab4j/api/ProjectApi.java

@@ -46,6 +46,7 @@ import org.gitlab4j.api.models.Issue;
 import org.gitlab4j.api.models.Member;
 import org.gitlab4j.api.models.Namespace;
 import org.gitlab4j.api.models.Project;
+import org.gitlab4j.api.models.ProjectFetches;
 import org.gitlab4j.api.models.ProjectFilter;
 import org.gitlab4j.api.models.ProjectHook;
 import org.gitlab4j.api.models.ProjectUser;
@@ -57,8 +58,9 @@ import org.gitlab4j.api.models.Visibility;
 /**
  * This class provides an entry point to all the GitLab API project calls.
  * @see <a href="https://docs.gitlab.com/ce/api/projects.html">Projects API at GitLab</a>
- * @see <a href="https://docs.gitlab.com/ee/api/members.html">Group and project members API at GitLab</a>
- * @see <a href="https://docs.gitlab.com/ee/api/access_requests.html#group-and-project-access-requests-api">Group and project access requests API</a>
+ * @see <a href="https://docs.gitlab.com/ce/api/project_statistics.html">Project statistics API</a>
+ * @see <a href="https://docs.gitlab.com/ce/api/members.html">Group and project members API at GitLab</a>
+ * @see <a href="https://docs.gitlab.com/ce/api/access_requests.html#group-and-project-access-requests-api">Group and project access requests API</a>
  */
 public class ProjectApi extends AbstractApi implements Constants {
 
@@ -66,6 +68,40 @@ public class ProjectApi extends AbstractApi implements Constants {
         super(gitLabApi);
     }
 
+    /**
+     * Get the project fetch statistics for the last 30 days. Retrieving the statistics requires
+     * write access to the repository. Currently only HTTP fetches statistics are returned.
+     * Fetches statistics includes both clones and pulls count and are HTTP only,
+     * SSH fetches are not included.
+     *
+     * <pre><code>GitLab Endpoint: GET /project/:id/statistics</code></pre>
+     *
+     * @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance, required
+     * @return a ProjectFetches instance with the project fetch statistics for the last 30 days
+     * @throws GitLabApiException if any exception occurs during execution
+     */
+    public ProjectFetches getProjectStatistics(Object projectIdOrPath) throws GitLabApiException {
+        Response response = get(Response.Status.OK, null, "projects", getProjectIdOrPath(projectIdOrPath), "statistics");
+        return (response.readEntity(ProjectFetches.class));
+    }
+
+    /**
+     * Get an Optional instance with the value for the project fetch statistics for the last 30 days.
+     *
+     * <pre><code>GitLab Endpoint: GET /project/:id/statistics</code></pre>
+     *
+     * @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance, required
+     * @return an Optional instance with the value for the project fetch statistics for the last 30 day
+     * @throws GitLabApiException if any exception occurs during execution
+     */
+    public Optional<ProjectFetches> getOptionalProjectStatistics(Object projectIdOrPath) throws GitLabApiException {
+        try {
+            return (Optional.ofNullable(getProjectStatistics(projectIdOrPath)));
+        } catch (GitLabApiException glae) {
+            return (GitLabApi.createOptionalFromException(glae));
+        }
+    }
+
     /**
      * <p>Get a list of projects accessible by the authenticated user.</p>
      *

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

@@ -12,8 +12,6 @@ import org.gitlab4j.api.GitLabApiForm;
 import org.gitlab4j.api.utils.ISO8601;
 
 /**
- * Created by zhengrenjie on 2018/09/11 12:31
- *
  *  This class is used to filter issues when getting lists of them.
  */
 public class IssueFilter {

src/main/java/org/gitlab4j/api/utils/ISO8601.java

@@ -26,6 +26,7 @@ public class ISO8601 {
     public static final String OUTPUT_PATTERN = "yyyy-MM-dd'T'HH:mm:ss'Z'";
     public static final String OUTPUT_MSEC_PATTERN = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'";
     public static final String UTC_PATTERN = "yyyy-MM-dd HH:mm:ss 'UTC'";
+    public static final String DATE_ONLY_PATTERN = "yyyy-MM-dd";
 
     private static final DateTimeFormatter ODT_WITH_MSEC_PARSER = new DateTimeFormatterBuilder().appendPattern("yyyy-MM-dd[['T'][ ]HH:mm:ss.SSS[ ][XXXXX][XXXX]]").toFormatter();
     private static final DateTimeFormatter ODT_PARSER = new DateTimeFormatterBuilder().appendPattern("yyyy-MM-dd[['T'][ ]HH:mm:ss[.SSS][ ][XXX][X]]")
@@ -116,6 +117,21 @@ public class ISO8601 {
                 SafeDateFormatter.getDateFormat(OUTPUT_PATTERN).format(date));
     }
 
+    /**
+     * Get a string that includes the date only in yyyy-mm-ss format.
+     *
+     * @param date the Date instance to get the date only formatted string for
+     * @return a string that includes the date only in yyyy-mm-ss format, or null if date is null
+     */
+    public static String dateOnly(Date date) {
+
+        if (date == null) {
+            return (null);
+        }
+
+        return SafeDateFormatter.getDateFormat(DATE_ONLY_PATTERN).format(date);
+    }
+
     /**
      * Get a ISO8601 formatted string for the provided Date instance.
      * 

src/main/java/org/gitlab4j/api/utils/JacksonJson.java

@@ -257,6 +257,18 @@ public class JacksonJson extends JacksonJaxbJsonProvider implements ContextResol
         return (results);
     }
 
+    /**
+     * JsonSerializer for serializing dates s yyyy-mm-dd in UTC timezone.
+     */
+    public static class DateOnlySerializer extends JsonSerializer<Date> {
+
+        @Override
+        public void serialize(Date date, JsonGenerator gen, SerializerProvider provider) throws IOException, JsonProcessingException {
+            String dateString = ISO8601.dateOnly(date);
+            gen.writeString(dateString);
+        }
+    }
+
     /**
      * JsonSerializer for serializing ISO8601 formatted dates.
      */

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

@@ -52,6 +52,7 @@ import org.gitlab4j.api.models.Epic;
 import org.gitlab4j.api.models.EpicIssue;
 import org.gitlab4j.api.models.Event;
 import org.gitlab4j.api.models.ExportStatus;
+import org.gitlab4j.api.models.ProjectFetches;
 import org.gitlab4j.api.models.FileUpload;
 import org.gitlab4j.api.models.Group;
 import org.gitlab4j.api.models.HealthCheckInfo;
@@ -59,6 +60,7 @@ import org.gitlab4j.api.models.ImpersonationToken;
 import org.gitlab4j.api.models.ImportStatus;
 import org.gitlab4j.api.models.Issue;
 import org.gitlab4j.api.models.IssueLink;
+import org.gitlab4j.api.models.IssuesStatistics;
 import org.gitlab4j.api.models.Job;
 import org.gitlab4j.api.models.Key;
 import org.gitlab4j.api.models.Label;
@@ -208,6 +210,18 @@ public class TestGitLabApiBeans {
         assertTrue(compareJson(fileUpload, "file-upload.json"));
     }
 
+    @Test
+    public void testIssuesStatistics() throws Exception {
+        IssuesStatistics statistics = unmarshalResource(IssuesStatistics.class, "issues-statistics.json");
+        assertTrue(compareJson(statistics, "issues-statistics.json"));
+    }
+
+    @Test
+    public void testProjectFetches() throws Exception {
+        ProjectFetches fetches = unmarshalResource(ProjectFetches.class, "project-fetches.json");
+        assertTrue(compareJson(fetches, "project-fetches.json"));
+    }
+
     @Test
     public void testGroup() throws Exception {
         Group group = unmarshalResource(Group.class, "group.json");

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

@@ -44,6 +44,7 @@ import org.gitlab4j.api.models.AccessRequest;
 import org.gitlab4j.api.models.Group;
 import org.gitlab4j.api.models.Member;
 import org.gitlab4j.api.models.Project;
+import org.gitlab4j.api.models.ProjectFetches;
 import org.gitlab4j.api.models.ProjectFilter;
 import org.gitlab4j.api.models.User;
 import org.gitlab4j.api.models.Variable;
@@ -847,4 +848,11 @@ public class TestProjectApi extends AbstractIntegrationTest {
             }
         }
     }
+
+    @Test
+    public void testGetProjectStatistics() throws GitLabApiException {
+        assertNotNull(testProject);
+        Optional<ProjectFetches> statistics = gitLabApi.getProjectApi().getOptionalProjectStatistics(testProject);
+        assertTrue(statistics.isPresent());
+    }
 }