Add support for email on push integration.

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

@@ -3,6 +3,7 @@ package org.gitlab4j.api;
 import org.gitlab4j.api.GitLabApi.ApiVersion;
 import org.gitlab4j.api.services.BugzillaService;
 import org.gitlab4j.api.services.CustomIssueTrackerService;
+import org.gitlab4j.api.services.EmailOnPushService;
 import org.gitlab4j.api.services.ExternalWikiService;
 import org.gitlab4j.api.services.HipChatService;
 import org.gitlab4j.api.services.JiraService;
@@ -493,4 +494,58 @@ public class ServicesApi extends AbstractApi {
         delete(Response.Status.OK, null, "projects", getProjectIdOrPath(projectIdOrPath), "services", "custom-issue-tracker");
 
     }
+
+    /**
+     * Get the Custom Issue Tracker service settings for a project.
+     *
+     * <pre><code>GitLab Endpoint: GET /projects/:id/services/custom_issue_tracker</code></pre>
+     *
+     * @param projectIdOrPath id, path of the project, or a Project instance holding the project ID or path
+     * @return a ExternalWikiService instance holding the External Wiki service settings
+     * @throws GitLabApiException if any exception occurs
+     */
+    public EmailOnPushService getEmailOnPushService(Object projectIdOrPath) throws GitLabApiException {
+        Response response = this.get(Response.Status.OK, null, "projects", getProjectIdOrPath(projectIdOrPath), "services", "emails-on-push");
+        return (response.readEntity(EmailOnPushService.class));
+    }
+
+    /**
+     * Updates the Custom Issue Tracker service settings for a project.
+     *
+     * <pre><code>GitLab Endpoint: PUT /projects/:id/services/custom_issue_tracker</code></pre>
+     *
+     * The following properties on the CustomIssueTrackerService instance are utilized in the update of the settings:
+     * <p>
+     * description (optional), description
+     * issuesUrl (required), issue url
+     * newIssueUrl (required), new Issue url
+     * projectUrl (required), project url
+     * pushEvents (optional) - Enable notifications for push events
+     * title (optional), the title for the custom issue tracker
+     * </p>
+     *
+     * @param projectIdOrPath id, path of the project, or a Project instance holding the project ID or path
+     * @param customIssueTracker the CustomIssueTrackerService instance holding the settings
+     * @return a CustomIssueTrackerService instance holding the newly updated settings
+     * @throws GitLabApiException if any exception occurs
+     */
+    public EmailOnPushService updateEmailOnPushService(Object projectIdOrPath,  EmailOnPushService customIssueTracker) throws GitLabApiException {
+        GitLabApiForm formData = customIssueTracker.servicePropertiesForm();
+        Response response = put(Response.Status.OK, formData.asMap(), "projects", getProjectIdOrPath(projectIdOrPath), "services", "emails-on-push");
+        return (response.readEntity(EmailOnPushService.class));
+    }
+
+    /**
+     * Deletes the Custom Issue Tracker service for a project.
+     *
+     * <pre><code>GitLab Endpoint: DELETE /projects/:id/services/custom_issue_tracker</code></pre>
+     *
+     * @param projectIdOrPath id, path of the project, or a Project instance holding the project ID or path
+     * @throws GitLabApiException if any exception occurs
+     */
+    public void deleteEmailonPushService(Object projectIdOrPath) throws GitLabApiException {
+        delete(Response.Status.OK, null, "projects", getProjectIdOrPath(projectIdOrPath), "services", "emails-on-push");
+
+    }
+
 }

src/main/java/org/gitlab4j/api/services/EmailOnPushService.java

+package org.gitlab4j.api.services;
+
+import org.gitlab4j.api.GitLabApiForm;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+
+public class EmailOnPushService extends NotificationService {
+
+    public static final String RECIPIENT_PROP = "recipients";
+    public static final String DISABLE_DIFFS_PROP = "disable_diffs";
+    public static final String SEND_FROM_COMMITTER_EMAIL = "send_from_committer_email";
+    public static final String BRANCHES_TO_BE_NOTIFIED = "branches_to_be_notified";
+
+	@Override
+	public GitLabApiForm servicePropertiesForm() {
+        GitLabApiForm formData = new GitLabApiForm()
+                .withParam(RECIPIENT_PROP, getRecipients(), true)
+                .withParam(DISABLE_DIFFS_PROP, getDisableDiffs())
+                .withParam(SEND_FROM_COMMITTER_EMAIL, getSendFromCommitterEmail())
+                .withParam(PUSH_EVENTS_PROP, getPushEvents())
+                .withParam("tag_push_events", getTagPushEvents())
+                .withParam(BRANCHES_TO_BE_NOTIFIED, getBranchesToBeNotified());
+            return formData;
+	}
+
+    public EmailOnPushService withPushEvents(Boolean pushEvents) {
+        return withPushEvents(pushEvents, this);
+    }
+    public EmailOnPushService withTagPushEvents(Boolean pushEvents) {
+        return withTagPushEvents(pushEvents, this);
+    }
+
+    @JsonIgnore
+	public String getRecipients() {
+		return ((String)getProperty(RECIPIENT_PROP));
+	}
+	public void setRecipients(String recipients) {
+		setProperty(RECIPIENT_PROP, recipients);
+	}
+    public EmailOnPushService withRecipients(String recipients) {
+    	setRecipients(recipients);
+    	return this;
+    }
+
+
+    @JsonIgnore
+    public Boolean getDisableDiffs() {
+		return Boolean.valueOf(getProperty(DISABLE_DIFFS_PROP,"false"));
+	}
+	public void setDisableDiffs(Boolean disableDiffs) {
+		setProperty(DISABLE_DIFFS_PROP, disableDiffs);
+	}
+	public EmailOnPushService withDisableDiffs(Boolean disableDiffs) {
+		setDisableDiffs(disableDiffs);
+		return this;
+	}
+	
+    @JsonIgnore
+	public Boolean getSendFromCommitterEmail() {
+		return Boolean.valueOf(getProperty(SEND_FROM_COMMITTER_EMAIL,"false"));
+	}
+	public void setSendFromCommitterEmail(Boolean sendFromCommitterEmail) {
+		setProperty(SEND_FROM_COMMITTER_EMAIL, sendFromCommitterEmail);
+	}
+	public EmailOnPushService withSendFromCommitterEmail(Boolean sendFromCommitterEmail) {
+		setSendFromCommitterEmail(sendFromCommitterEmail);
+		return this;
+	}
+
+    @JsonIgnore
+	public String getBranchesToBeNotified() {
+		return ((String)getProperty(BRANCHES_TO_BE_NOTIFIED));
+	}
+	public void setBranchesToBeNotified(String branchesToBeNotified) {
+		setProperty(BRANCHES_TO_BE_NOTIFIED, branchesToBeNotified);
+	}
+	public EmailOnPushService withBranchesToBeNotified(String branchesToBeNotified) {
+		setBranchesToBeNotified(branchesToBeNotified);
+		return this;
+	}
+
+
+}