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package com.sendgrid;
import org.json.JSONObject;
import com.sendgrid.smtpapi.SMTPAPI;
import java.util.ArrayList;
import java.io.ByteArrayInputStream;
import java.io.FileNotFoundException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.io.FileInputStream;
import java.io.File;
import java.io.InputStream;
import java.io.IOException;
import org.apache.http.HttpResponse;
import org.apache.http.HttpEntity;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.util.EntityUtils;
import org.apache.http.entity.ContentType;
public class SendGrid {
private static final String VERSION = "2.1.0";
private static final String USER_AGENT = "sendgrid/" + VERSION + ";java";
private static final String PARAM_TO = "to[%d]";
private static final String PARAM_TONAME = "toname[%d]";
private static final String PARAM_CC = "cc[%d]";
private static final String PARAM_FROM = "from";
private static final String PARAM_FROMNAME = "fromname";
private static final String PARAM_REPLYTO = "replyto";
private static final String PARAM_BCC = "bcc[%d]";
private static final String PARAM_SUBJECT = "subject";
private static final String PARAM_HTML = "html";
private static final String PARAM_TEXT = "text";
private static final String PARAM_FILES = "files[%s]";
private static final String PARAM_CONTENTS = "content[%s]";
private static final String PARAM_XSMTPAPI = "x-smtpapi";
private static final String PARAM_HEADERS = "headers";
private String username;
private String password;
private String url;
private String port;
private String endpoint;
private CloseableHttpClient client;
public SendGrid(String username, String password) {
this.username = username;
this.password = password;
this.url = "https://api.sendgrid.com";
this.endpoint = "/api/mail.send.json";
this.client = HttpClientBuilder.create().setUserAgent(USER_AGENT).build();
}
public SendGrid setUrl(String url) {
this.url = url;
return this;
}
public SendGrid setEndpoint(String endpoint) {
this.endpoint = endpoint;
return this;
}
public String getVersion() {
return VERSION;
}
public SendGrid setClient(CloseableHttpClient client) {
this.client = client;
return this;
}
public HttpEntity buildBody(Email email) {
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.addTextBody("api_user", this.username);
builder.addTextBody("api_key", this.password);
String[] tos = email.getTos();
String[] tonames = email.getToNames();
String[] ccs = email.getCcs();
String[] bccs = email.getBccs();
// If SMTPAPI Header is used, To is still required. #workaround.
if (tos.length == 0) {
builder.addTextBody(String.format(PARAM_TO, 0), email.getFrom(), ContentType.create("text/plain", "UTF-8"));
}
for (int i = 0, len = tos.length; i < len; i++)
builder.addTextBody(String.format(PARAM_TO, i), tos[i], ContentType.create("text/plain", "UTF-8"));
for (int i = 0, len = tonames.length; i < len; i++)
builder.addTextBody(String.format(PARAM_TONAME, i), tonames[i], ContentType.create("text/plain", "UTF-8"));
for (int i = 0, len = ccs.length; i < len; i++)
builder.addTextBody(String.format(PARAM_CC, i), ccs[i], ContentType.create("text/plain", "UTF-8"));
for (int i = 0, len = bccs.length; i < len; i++)
builder.addTextBody(String.format(PARAM_BCC, i), bccs[i], ContentType.create("text/plain", "UTF-8"));
// Files
if (email.getAttachments().size() > 0) {
Iterator it = email.getAttachments().entrySet().iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
builder.addBinaryBody(String.format(PARAM_FILES, entry.getKey()), (InputStream) entry.getValue());
}
}
if (email.getContentIds().size() > 0) {
Iterator it = email.getContentIds().entrySet().iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
builder.addTextBody(String.format(PARAM_CONTENTS, entry.getKey()), (String) entry.getValue());
}
}
if (email.getHeaders().size() > 0)
builder.addTextBody(PARAM_HEADERS, new JSONObject(email.getHeaders()).toString(), ContentType.create("text/plain", "UTF-8"));
if (email.getFrom() != null && !email.getFrom().isEmpty())
builder.addTextBody(PARAM_FROM, email.getFrom(), ContentType.create("text/plain", "UTF-8"));
if (email.getFromName() != null && !email.getFromName().isEmpty())
builder.addTextBody(PARAM_FROMNAME, email.getFromName(), ContentType.create("text/plain", "UTF-8"));
if (email.getReplyTo() != null && !email.getReplyTo().isEmpty())
builder.addTextBody(PARAM_REPLYTO, email.getReplyTo(), ContentType.create("text/plain", "UTF-8"));
if (email.getSubject() != null && !email.getSubject().isEmpty())
builder.addTextBody(PARAM_SUBJECT, email.getSubject(), ContentType.create("text/plain", "UTF-8"));
if (email.getHtml() != null && !email.getHtml().isEmpty())
builder.addTextBody(PARAM_HTML, email.getHtml(), ContentType.create("text/plain", "UTF-8"));
if (email.getText() != null && !email.getText().isEmpty())
builder.addTextBody(PARAM_TEXT, email.getText(), ContentType.create("text/plain", "UTF-8"));
if (!email.smtpapi.jsonString().equals("{}"))
builder.addTextBody(PARAM_XSMTPAPI, email.smtpapi.jsonString(), ContentType.create("text/plain", "UTF-8"));
return builder.build();
}
public SendGrid.Response send(Email email) throws SendGridException {
HttpPost httppost = new HttpPost(this.url + this.endpoint);
httppost.setEntity(this.buildBody(email));
try {
HttpResponse res = this.client.execute(httppost);
return new SendGrid.Response(res.getStatusLine().getStatusCode(), EntityUtils.toString(res.getEntity()));
} catch (IOException e) {
throw new SendGridException(e);
}
}
public static class Email {
private SMTPAPI smtpapi;
private ArrayList<String> to;
private ArrayList<String> toname;
private ArrayList<String> cc;
private String from;
private String fromname;
private String replyto;
private String subject;
private String text;
private String html;
private ArrayList<String> bcc;
private Map<String, InputStream> attachments;
private Map<String, String> contents;
private Map<String, String> headers;
public Email () {
this.smtpapi = new SMTPAPI();
this.to = new ArrayList<String>();
this.toname = new ArrayList<String>();
this.cc = new ArrayList<String>();
this.bcc = new ArrayList<String>();
this.attachments = new HashMap<String, InputStream>();
this.contents = new HashMap<String, String>();
this.headers = new HashMap<String, String>();
}
public Email addTo(String to) {
this.to.add(to);
return this;
}
public Email addTo(String[] tos) {
this.to.addAll(Arrays.asList(tos));
return this;
}
public Email addTo(String to, String name) {
this.addTo(to);
return this.addToName(name);
}
public Email setTo(String[] tos) {
this.to = new ArrayList<String>(Arrays.asList(tos));
return this;
}
public String[] getTos() {
return this.to.toArray(new String[this.to.size()]);
}
public Email addSmtpApiTo(String to) {
this.smtpapi.addTo(to);
return this;
}
public Email addSmtpApiTo(String[] to) {
this.smtpapi.addTos(to);
return this;
}
public Email addToName(String toname) {
this.toname.add(toname);
return this;
}
public Email addToName(String[] tonames) {
this.toname.addAll(Arrays.asList(tonames));
return this;
}
public Email setToName(String[] tonames) {
this.toname = new ArrayList<String>(Arrays.asList(tonames));
return this;
}
public String[] getToNames() {
return this.toname.toArray(new String[this.toname.size()]);
}
public Email addCc(String cc) {
this.cc.add(cc);
return this;
}
public Email addCc(String[] ccs) {
this.cc.addAll(Arrays.asList(ccs));
return this;
}
public Email setCc(String[] ccs) {
this.cc = new ArrayList<String>(Arrays.asList(ccs));
return this;
}
public String[] getCcs() {
return this.cc.toArray(new String[this.cc.size()]);
}
public Email setFrom(String from) {
this.from = from;
return this;
}
public String getFrom() {
return this.from;
}
public Email setFromName(String fromname) {
this.fromname = fromname;
return this;
}
public String getFromName() {
return this.fromname;
}
public Email setReplyTo(String replyto) {
this.replyto = replyto;
return this;
}
public String getReplyTo() {
return this.replyto;
}
public Email addBcc(String bcc) {
this.bcc.add(bcc);
return this;
}
public Email addBcc(String[] bccs) {
this.bcc.addAll(Arrays.asList(bccs));
return this;
}
public Email setBcc(String[] bccs) {
this.bcc = new ArrayList<String>(Arrays.asList(bccs));
return this;
}
public String[] getBccs() {
return this.bcc.toArray(new String[this.bcc.size()]);
}
public Email setSubject(String subject) {
this.subject = subject;
return this;
}
public String getSubject() {
return this.subject;
}
public Email setText(String text) {
this.text = text;
return this;
}
public String getText() {
return this.text;
}
public Email setHtml(String html) {
this.html = html;
return this;
}
public String getHtml() {
return this.html;
}
public Email addSubstitution(String key, String[] val) {
this.smtpapi.addSubstitutions(key, val);
return this;
}
public JSONObject getSubstitutions() {
return this.smtpapi.getSubstitutions();
}
public Email addUniqueArg(String key, String val) {
this.smtpapi.addUniqueArg(key, val);
return this;
}
public JSONObject getUniqueArgs() {
return this.smtpapi.getUniqueArgs();
}
public Email addCategory(String category) {
this.smtpapi.addCategory(category);
return this;
}
public String[] getCategories() {
return this.smtpapi.getCategories();
}
public Email addSection(String key, String val) {
this.smtpapi.addSection(key, val);
return this;
}
public JSONObject getSections() {
return this.smtpapi.getSections();
}
public Email addFilter(String filter_name, String parameter_name, String parameter_value) {
this.smtpapi.addFilter(filter_name, parameter_name, parameter_value);
return this;
}
public JSONObject getFilters() {
return this.smtpapi.getFilters();
}
public Email setASMGroupId(int val) {
this.smtpapi.setASMGroupId(val);
return this;
}
public Integer getASMGroupId() {
return this.smtpapi.getASMGroupId();
}
public Email setSendAt(int sendAt) {
this.smtpapi.setSendAt(sendAt);
return this;
}
public int getSendAt() {
return this.smtpapi.getSendAt();
}
public Email addAttachment(String name, File file) throws IOException, FileNotFoundException {
return this.addAttachment(name, new FileInputStream(file));
}
public Email addAttachment(String name, String file) throws IOException {
return this.addAttachment(name, new ByteArrayInputStream(file.getBytes()));
}
public Email addAttachment(String name, InputStream file) throws IOException {
this.attachments.put(name, file);
return this;
}
public Map getAttachments() {
return this.attachments;
}
public Email addContentId(String attachmentName, String cid) {
this.contents.put(attachmentName, cid);
return this;
}
public Map getContentIds() {
return this.contents;
}
public Email addHeader(String key, String val) {
this.headers.put(key, val);
return this;
}
public Map getHeaders() {
return this.headers;
}
public SMTPAPI getSMTPAPI() {
return this.smtpapi;
}
}
public static class Response {
private int code;
private boolean success;
private String message;
public Response(int code, String msg) {
this.code = code;
this.success = code == 200;
this.message = msg;
}
public int getCode() {
return this.code;
}
public boolean getStatus() {
return this.success;
}
public String getMessage() {
return this.message;
}
}
}
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