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line-messaging

==

SDK of the LINE Messaging API for Node.js

Installation

The LINE BOT API SDK can be installed with NPM.

$ npm install line-messaging

Getting started

Require the SDK

var LINEBot = require('line-messaging');

Using with Express 3/4

var app = require('express')();
var bot = LINEBot.Client({
  channelID: '<your channel ID>',
  channelSecret: '<your channel secret>',
  channelAccessToken: '<your channel token>'
});
app.use(bot.webhook('/webhook'));
bot.on(LINEBot.Events.MESSAGE, function(replyToken, message) {
  // add code below.
});
app.listen(8080);

Create the bot client instance

Instance of bot client is a handler of the Messaging API.

var bot = LINEBot.Client({
  channelID: '<your channel ID>',
  channelSecret: '<your channel secret>',
  channelAccessToken: '<your channel token>'
})

Call API

You can call API through the bot client instance.

Reply message

sample is following;

bot.replyTextMessage('<reply token>', 'hello!').then(function(data) {
  // add your code when success.
}).catch(function(error) {
  // add your code when error.
});

This procedure sends a message to the destination that is associated with .

More advanced sample is below;

var textMessageBuilder = new LINEBot.TextMessageBuilder('hello');
bot.replyMessage('<reply token>', textMessageBuilder);

LINEBot#replyMessage() takes reply token and MessageBuilder. This method sends message that is built by MessageBuilder to the destination.

Get profile

Get detail information of user.

bot.getProfile('<user id>').then(function(data) {
  // add your code when success.
}).catch(function(error) {
  // add your code when error.
});

When LINEBot#getProfile() success return JSON object.

Response body example

{
    "displayName":"LINE taro",
    "userId":"Uxxxxxxxxxxxxxx...",
    "pictureUrl":"http://obs.line-apps.com/...",
    "statusMessage":"Hello, LINE!"
}

Get message content

Get detail information of message content.

bot.getMessageContent('<message id>').then(function(data) {
  // add your code when success.
}).catch(function(error) {
// add your code when error.
});

When LINEBot#getMessageContent() success return the content in binary.

Push message

sample is following;

bot.pushTextMessage('<user id>', 'hello!');

This procedure sends a message to the destination that is associated with .

More advanced sample is below;

var textMessageBuilder = new LINEBot.TextMessageBuilder('hello');
bot.pushMessage('<user id>', textMessageBuilder);

Other method;

Send image message

bot.pushImageMessage('<user id>', 'https://example.com/original.jpg', 'https://example.com/preview.jpg');

Send audio message

bot.pushAudioMessage('<user id>', 'https://example.com/original.m4a', 240000);

Send video message

bot.pushVideoMessage('<user id>', 'https://example.com/original.mp4', 'https://example.com/preview.jpg');

Send location message

bot.pushLocationMessage('<user id>', 'my location', '〒150-0002 東京都渋谷区渋谷２丁目２１−１', 35.65910807942215, 139.70372892916203);

Send sticker message

bot.pushStickerMessage('<user id>', <STKPKGID>, <STKID>);

If you want detail information of sticker, please refer Sticker

Send multi message

bot.pushMultiMessage('<user id>', '<array of message builder>');

Message builder

Type of message depends on the type of instance of MessageBuilder. That means this method sends text message if you pass TextMessageBuilder, on the other hand it sends image message if you pass ImageMessageBuilder.

The type of instance of MessageBuilder

TextMessageBuilder

var text = new LINEBot.TextMessageBuilder('Hello', 'World!', ...);

ImageMessageBuilder

var image = new LINEBot.ImageMessageBuilder('https://example.com/original.jpg', 'https://example.com/preview.jpg');

AudioMessageBuilder

var audio = new LINEBot.AudioMessageBuilder('https://example.com/original.m4a', 240000);

VideoMessageBuilder

var video = new LINEBot.VideoMessageBuilder('https://example.com/original.mp4', 'https://example.com/preview.jpg');

LocationMessageBuilder

var location = new LINEBot.LocationMessageBuilder('my location', '〒150-0002 東京都渋谷区渋谷２丁目２１−１', 35.65910807942215, 139.70372892916203);

StickerMessageBuilder

var sticker = new LINEBot.StickerMessageBuilder(<STKPKGID>, <STKID>);

MultiMessageBuilder

var multiMessageBuilder = new LINEBot.MultiMessageBuilder([
  text,
  image,
  audio,
  video
]);

ImagemapMessageBuilder

var imagemap = new LINEBot.ImagemapMessageBuilder();
imagemap.setImageBase('https://example.com/bot/images/rm001');
imagemap.setAlternate('this is an imagemap');
imagemap.setBaseSize(1040, 1040);

// message/url, x, y, with, height, type
imagemap.addAction('https://example.com/', 0, 100, 1040, 100, LINEBot.Action.URI);
imagemap.addAction('hello', 0, 200, 1040, 100, LINEBot.Action.MESSAGE);

TemplateMessageBuilder

• Buttons

var buttons = new LINEBot.ButtonTemplateBuilder();
buttons.setTitle('Menu');
buttons.setMessage('Please select');
buttons.setThumbnail('https://example.com/bot/images/image.jpg');

// label, data/url, type
buttons.addAction('Buy', 'action=buy&itemid=123', LINEBot.Action.POSTBACK);
buttons.addAction('Add to cart', 'action=buy&itemid=123', LINEBot.Action.POSTBACK);
buttons.addAction('View detail', 'http://example.com/page/123', LINEBot.Action.URI);

• Confirm

// create confirm template
var confirm = new LINEBot.ConfirmTemplateBuilder();
confirm.setMessage('Are you sure?');
confirm.setPositiveAction('OK', 'ok');
confirm.setNegativeAction('Cancel', 'cannel');

• Carousel

var column1 = new LINEBot.CarouselColumnTemplateBuilder();
column1.setTitle('this is item 1')
       .setMessage('description')
       .setThumbnail('https://example.com/bot/images/item1.jpg')
       .addAction('Buy', 'action=buy&itemid=111', LINEBot.Action.POSTBACK)
       .addAction('Add to cart', 'action=buy&itemid=111', LINEBot.Action.POSTBACK)
       .addAction('View detail', 'http://example.com/page/111', LINEBot.Action.URI);

var column2 = new LINEBot.CarouselColumnTemplateBuilder();
column2.setTitle('this is item 2')
       .setMessage('description')
       .setThumbnail('https://example.com/bot/images/item2.jpg')
       .addAction('Buy', 'action=buy&itemid=222', LINEBot.Action.POSTBACK)
       .addAction('Add to cart', 'action=buy&itemid=222', LINEBot.Action.POSTBACK)
       .addAction('View detail', 'http://example.com/page/222', LINEBot.Action.URI);

var column3 = new LINEBot.CarouselColumnTemplateBuilder();
column3.setTitle('this is item 3')
       .setMessage('description')
       .setThumbnail('https://example.com/bot/images/item3.jpg')
       .addAction('Buy', 'action=buy&itemid=333', LINEBot.Action.POSTBACK)
       .addAction('Add to cart', 'action=buy&itemid=333', LINEBot.Action.POSTBACK)
       .addAction('View detail', 'http://example.com/page/333', LINEBot.Action.URI);

var carousel = new LINEBot.CarouselTemplateBuilder([column1, column2, column3]);

And after create template, Your must be create instance MessageBuilder before sends;

var template = new LINEBot.TemplateMessageBuilder('this is a buttons template', buttons);

Webhook

LINE's server sends user action (message, image, location and etc.) to your bot server. Request of that contains event(s); event is action of the user.

Webhook events:

• MESSAGE Event name which contains the sent message.
• FOLLOW Event name for when your account is added as a friend (or unblocked). You can reply to follow events.
• UNFOLLOW Event name for when your account is blocked.
• JOIN Event name for when your account joins a group or talk room. You can reply to join events.
• LEAVE Event name for when your account leaves a group.
• POSTBACK Event name for when a user performs an action on a template message which initiates a postback. You can reply to postback events.
• BEACON Event name for when a user detects a LINE Beacon. You can reply to beacon events.

See Also

• https://devdocs.line.me/en/#messaging-api