Added support for listing projects for a specified user (#268).

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

@@ -13,6 +13,7 @@ import javax.ws.rs.core.StreamingOutput;
 import org.gitlab4j.api.GitLabApi.ApiVersion;
 import org.gitlab4j.api.models.Group;
 import org.gitlab4j.api.models.Project;
+import org.gitlab4j.api.models.User;
 
 /**
  * This class is the base class for all the sub API classes. It provides implementations of
@@ -98,6 +99,42 @@ public abstract class AbstractApi implements Constants {
         }
     }
 
+    /**
+     * Returns the user ID or path from the provided Integer, String, or User instance.
+     *
+     * @param obj the object to determine the ID or username from
+     * @return the user ID or username from the provided Integer, String, or User instance
+     * @throws GitLabApiException if any exception occurs during execution
+     */
+    public Object getUserIdOrUsername(Object obj) throws GitLabApiException {
+
+        if (obj == null) {
+            throw (new RuntimeException("Cannot determine ID or username from null object"));
+        } else if (obj instanceof Integer) {
+            return (obj);
+        } else if (obj instanceof String) {
+            return (urlEncode(((String) obj).trim()));
+        } else if (obj instanceof User) {
+
+            Integer id = ((User) obj).getId();
+            if (id != null && id.intValue() > 0) {
+                return (id);
+            }
+
+            String username = ((User) obj).getUsername();
+            if (username != null && username.trim().length() > 0) {
+                return (urlEncode(username.trim()));
+            }
+
+            throw (new RuntimeException("Cannot determine ID or username from provided User instance"));
+
+        } else {
+
+            throw (new RuntimeException("Cannot determine ID or username from provided " + obj.getClass().getSimpleName() +
+                    " instance, must be Integer, String, or a User instance"));
+        }
+    }
+
     protected ApiVersion getApiVersion() {
         return (gitLabApi.getApiVersion());
     }

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

@@ -42,6 +42,7 @@ import org.gitlab4j.api.models.FileUpload;
 import org.gitlab4j.api.models.Issue;
 import org.gitlab4j.api.models.Member;
 import org.gitlab4j.api.models.Project;
+import org.gitlab4j.api.models.ProjectFilter;
 import org.gitlab4j.api.models.ProjectHook;
 import org.gitlab4j.api.models.ProjectUser;
 import org.gitlab4j.api.models.PushRules;
@@ -464,6 +465,56 @@ public class ProjectApi extends AbstractApi implements Constants {
         return (new Pager<Project>(this, Project.class, itemsPerPage, formData.asMap(), "projects"));
     }
 
+    /**
+     * Get a list of visible projects owned by the given user.
+     *
+     * <pre><code>GET /users/:user_id/projects</code></pre>
+     *
+     * @param userIdOrUsername the user ID, username of the user, or a User instance holding the user ID or username
+     * @param filter the ProjectFilter instance holding the filter values for the query
+     * @return a list of visible projects owned by the given use
+     * @throws GitLabApiException if any exception occurs
+     */
+    public List<Project> getUserProjects(Object userIdOrUsername, ProjectFilter filter) throws GitLabApiException {
+        return (getUserProjects(userIdOrUsername, filter, 1, getDefaultPerPage()));
+    }
+
+    /**
+     * Get a list of visible projects owned by the given user in the specified page range.
+     *
+     * <pre><code>GET /users/:user_id/projects</code></pre>
+     *
+     * @param userIdOrUsername the user ID, username of the user, or a User instance holding the user ID or username
+     * @param filter the ProjectFilter instance holding the filter values for the query
+     * @param page the page to get
+     * @param perPage the number of projects per page
+     * @return a list of visible projects owned by the given use
+     * @throws GitLabApiException if any exception occurs
+     */
+    public List<Project> getUserProjects(Object userIdOrUsername, ProjectFilter filter, int page, int perPage) throws GitLabApiException {
+        GitLabApiForm formData = filter.getQueryParams(page, perPage);
+        Response response = get(Response.Status.OK, formData.asMap(),
+                "users", getUserIdOrUsername(userIdOrUsername), "projects");
+        return (response.readEntity(new GenericType<List<Project>>() {}));
+    }
+
+    /**
+     * Get a Pager of visible projects owned by the given user.
+     *
+     * <pre><code>GET /users/:user_id/projects</code></pre>
+     *
+     * @param userIdOrUsername the user ID, username of the user, or a User instance holding the user ID or username
+     * @param filter the ProjectFilter instance holding the filter values for the query
+     * @param itemsPerPage the number of Project instances that will be fetched per page
+     * @return a Pager of visible projects owned by the given use
+     * @throws GitLabApiException if any exception occurs
+     */
+    public Pager<Project> getUserProjects(Object userIdOrUsername, ProjectFilter filter, int itemsPerPage) throws GitLabApiException {
+        GitLabApiForm formData = filter.getQueryParams();
+        return (new Pager<Project>(this, Project.class, itemsPerPage, formData.asMap(),
+                "users", getUserIdOrUsername(userIdOrUsername), "projects"));
+    }
+
     /**
      * Get a specific project, which is owned by the authentication user.
      *