Implement pduprocessors

src/Center/PDUProcessors/CenterPDUProcessor.ts

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+export interface CenterPDUProcessor {
+	processPdu(session: any, pdu: any): Promise<any>;
+}

src/Center/PDUProcessors/DebugProcessor.ts

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+import Logger from "../../Logger";
+import {CenterPDUProcessor} from "./CenterPDUProcessor";
+
+export class DebugProcessor implements CenterPDUProcessor {
+	private logger: Logger;
+
+	constructor() {
+		this.logger = new Logger('DebugProcessor');
+	}
+
+	processPdu(session: any, pdu: any): Promise<any> {
+		return new Promise<any>((resolve, reject) => {
+			session.send(pdu.response()).then((replyPdu: any) => resolve(replyPdu), (error: any) => reject(error));
+		});
+	}
+}

src/Center/PDUProcessors/EchoProcessor.ts

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+import Logger from "../../Logger";
+import {CenterPDUProcessor} from "./CenterPDUProcessor";
+
+const smpp = require("smpp");
+
+export class DebugProcessor implements CenterPDUProcessor {
+	private logger: Logger;
+
+	constructor() {
+		this.logger = new Logger('DebugProcessor');
+	}
+	processPdu(session: any, pdu: any): Promise<any> {
+		return new Promise<any>((resolve, reject) => {
+			let promises = [];
+			let replyPromise = session.send(pdu.response());
+			let sendPromise = session.send(new smpp.PDU('enquire_link', {
+				source_addr: pdu.destination_addr,
+				destination_addr: pdu.source_addr,
+				short_message: pdu.short_message
+			}));
+			promises.push(replyPromise);
+			promises.push(sendPromise);
+			Promise.all(promises).then((replyPdus: any) => {
+				resolve(replyPdus);
+			}).catch((error: any) => {
+				reject(error);
+			});
+		});
+	}
+}