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package com.sendgrid;

import java.io.IOException;

import java.util.HashMap;

import java.util.Map;

/**

* Class SendGrid allows for quick and easy access to the SendGrid API.

*/

public class SendGrid {

private static final String VERSION = "3.0.0";

private static final String USER_AGENT = "sendgrid/" + VERSION + ";java";

private String apiKey;

private String host;

private String version;

private Client client;

private Map<String,String> requestHeaders;

/**

* @param apiKey is your SendGrid API Key: https://app.sendgrid.com/settings/api_keys

*/

public SendGrid(String apiKey) {

this.client = new Client();

initializeSendGrid(apiKey);

}

/**

* @param apiKey is your SendGrid API Key: https://app.sendgrid.com/settings/api_keys

* @param test is true if you are unit testing

*/

public SendGrid(String apiKey, Boolean test) {

this.client = new Client(test);

initializeSendGrid(apiKey);

}

/**

* @param apiKey is your SendGrid API Key: https://app.sendgrid.com/settings/api_keys

* @param client the Client to use (allows to customize its configuration)

*/

public SendGrid(String apiKey, Client client) {

this.client = client;

initializeSendGrid(apiKey);

}

public void initializeSendGrid(String apiKey) {

this.apiKey = apiKey;

this.host = "api.sendgrid.com";

this.version = "v3";

this.requestHeaders = new HashMap<String, String>();

this.requestHeaders.put("Authorization", "Bearer " + apiKey);

this.requestHeaders.put("User-agent", USER_AGENT);

this.requestHeaders.put("Accept", "application/json");

}

public String getLibraryVersion() {

return this.VERSION;

}

public String getVersion() {

return this.version;

}

public void setVersion(String version) {

this.version = version;

}

public Map<String,String> getRequestHeaders() {

return this.requestHeaders;

}

public Map<String,String> addRequestHeader(String key, String value) {

this.requestHeaders.put(key, value);

return getRequestHeaders();

}

public Map<String,String> removeRequestHeader(String key) {

this.requestHeaders.remove(key);

return getRequestHeaders();

}

public String getHost() {

return this.host;

}

public void setHost(String host) {

this.host = host;

}

/**

* Class makeCall makes the call to the SendGrid API, override this method for testing.

*/

public Response makeCall(Request request) throws IOException {

Response response = new Response();

try {

response = client.api(request);

} catch (IOException ex) {

throw ex;

}

return response;

}

/**

* Class api sets up the request to the SendGrid API, this is main interface.

*/

public Response api(Request request) throws IOException {

Request req = new Request();

req.method = request.method;

req.baseUri = this.host;

req.endpoint = "/" + version + "/" + request.endpoint;

req.body = request.body;

req.headers = this.requestHeaders;

req.queryParams = request.queryParams;

return makeCall(req);

}

}