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Core ACS AEM Commons OSGi Bundle. Includes commons utilities.
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/*
 * #%L
 * ACS AEM Commons Bundle
 * %%
 * Copyright (C) 2013 Adobe
 * %%
 * 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.
 * #L%
 */
package com.adobe.acs.commons.email;

import org.osgi.annotation.versioning.ProviderType;

import javax.activation.DataSource;
import javax.mail.internet.InternetAddress;
import java.util.List;
import java.util.Map;

/**
 * A service interface for sending a generic template based Email Notification.
 *
 * The mailType is set to HTMLEmail by default if there are any attachments. Since we are using
 * the template to determine the mailType, the template name has to be *.html.
 *
 * Here is an example to send an email with attachments:
 *
 *      String attachment1 = "This text should be in the attache txt file."
 *      Map<String, DataSource> attachments = new HashMap<>();
 *      attachments.put("attachment1.txt", new ByteArrayDataSource(attachment1, "text/plain"));
 *      ...
 *      ...
 *      List<String> participantList = emailService.sendEmail(htmlEmailTemplatePath, emailParams, attachments, key);
 */
@ProviderType
public interface EmailService {

    /**
     * Construct an email based on a template and send it to one or more
     * recipients.
     * 
     * @param templatePath Absolute path of the template used to send the email.
     * @param emailParams Replacement variable map to be injected in the template
     * @param recipients recipient email addresses
     * 
     * @return failureList containing list recipient's InternetAddresses for which email sent failed
     */
    List sendEmail(String templatePath, Map emailParams,
        InternetAddress... recipients);

    /**
     * Construct an email based on a template and send it to one or more
     * recipients.
     * 
     * @param templatePath Absolute path of the template used to send the email.
     * @param emailParams Replacement variable map to be injected in the template
     * @param recipients recipient email addresses. Invalid email addresses are skipped.
     * 
     * @return failureList containing list recipient's String addresses for which email sent failed
     */
    List sendEmail(String templatePath, Map emailParams, String... recipients);

    /**
     * Construct an email with attachments based on a template and send it to one or more
     * recipients.
     *
     * @param templatePath Absolute path of the template used to send the email.
     * @param emailParams Replacement variable map to be injected in the template
     * @param attachments attachments map with file name
     * @param recipients recipient email addresses
     * @return failureList containing list recipient's String addresses for which email sent failed
     */
    List sendEmail(String templatePath, Map emailParams, Map attachments, InternetAddress... recipients);

    /**
     * Construct an email with attachments based on a template and send it to one or more
     * recipients.
     *
     * @param templatePath Absolute path of the template used to send the email.
     * @param emailParams Replacement variable map to be injected in the template
     * @param attachments attachments map with file name
     * @param recipients recipient email addresses
     * @return failureList containing list recipient's String addresses for which email sent failed
     */
    List sendEmail(String templatePath, Map emailParams, Map attachments, String... recipients);
}