Merge pull request #30 from bchainhub/update/feature-download-01

Feature - download

bin/txms

@@ -53,8 +53,11 @@ function run(typ, value, loc) {
 		} else if (typ === 'mms') {
 			const mms = txms.mms(true, value);
 			process.stdout.write(`${mms}\n`);
+		} else if (typ === 'download' || typ === 'dl') {
+			txms.downloadMessage(value, loc);
+			process.stdout.write(`TxMS downloaded as file\n`);
 		} else {
-			throw new Error('Invalid type specified. Use "encode", "decode", "getendpoint", "sms", or "mms".');
+			throw new Error('Invalid type specified.');
 		}
 		process.exit(0);
 	} catch (err) {

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "txms.js",
-	"version": "1.2.3",
+	"version": "1.2.4",
 	"description": "Transaction messaging service protocol",
 	"main": "dist/index.js",
 	"types": "dist/index.d.ts",

src/index.ts

@@ -1,10 +1,13 @@
+import fs from 'fs';
+
 export interface Transport {
 	encode(hex: string): string;
 	decode(data: string): string;
 	getEndpoint(network?: number | string, countriesList?: string | Array<string>): { [key: string]: Array<string> };
 	sms(number?: boolean | string | number | Array<string>, message?: string, network?: number | string, encodeMessage?: boolean, platform?: string): string;
 	mms(number?: boolean | string | number | Array<string>, message?: string, network?: number | string, encodeMessage?: boolean, platform?: string): string;
 	generateMessageUri(type: 'sms' | 'mms', number?: boolean | string | number | Array<string>, message?: string, network?: number | string, encodeMessage?: boolean, platform?: string): string;
+	downloadMessage(hex: string, optionalFilename?: string): void;
 }
 
 export interface Error extends globalThis.Error {
@@ -39,6 +42,14 @@ export function addCountry(networkId: number | string, countryCode: string, phon
 	countries[networkKey][countryCode] = phoneNumbers;
 }
 
+function slugify(str: string): string {
+	return str
+		.toLowerCase()
+		.replace(/[^\w\s-]/g, '')
+		.replace(/[\s_-]+/g, '-')
+		.replace(/^-+|-+$/g, '');
+}
+
 const txms: Transport = {
 	encode(hex: string): string {
 		let data = '';
@@ -156,6 +167,21 @@ const txms: Transport = {
 		}
 
 		return endpoint ? `${type}:${endpoint}${encodedMessage ? `${platform === 'ios' ? '&' : '?'}body=${encodedMessage}` : ''}` : `${type}:${platform === 'ios' ? '&' : '?'}body=${encodedMessage}`;
+	},
+
+	downloadMessage(hex: string, optionalFilename?: string): void {
+		const encodedMessage = this.encode(hex);
+
+		let filename: string;
+		const cleanedHex = hex.startsWith('0x') ? hex.slice(2) : hex;
+		const first6 = cleanedHex.slice(0, 6);
+		const last6 = cleanedHex.slice(-6);
+		filename = `${first6}${last6}.txms.txt`;
+		if (optionalFilename) {
+			filename = `${slugify(filename)}.txms.txt`;
+		}
+		const buffer = Buffer.from(encodedMessage, 'utf16le').swap16();
+		fs.writeFileSync(filename, buffer);
 	}
 };