Update docs according to rich menu API addition

Author: Hyunje Jun

docs/pages/api-reference/client.md

@@ -9,19 +9,37 @@ corresponding to [messaging APIs](https://developers.line.me/en/docs/messaging-a
 class Client {
   public config: ClientConfig
 
-  constructor(config: ClientConfig)
+  constructor(config: ClientConfig) {}
 
-  pushMessage(to: string, messages: Message | Message[]): Promise<{}>
-  replyMessage(replyToken: string, messages: Message | Message[]): Promise<{}>
-  multicast(to: string[], messages: Message | Message[]): Promise<{}>
+  // Message
+  pushMessage(to: string, messages: Message | Message[]): Promise<any>
+  replyMessage(replyToken: string, messages: Message | Message[]): Promise<any>
+  multicast(to: string[], messages: Message | Message[]): Promise<any>
+  getMessageContent(messageId: string): Promise<Readable>
+
+  // Profile
   getProfile(userId: string): Promise<Profile>
+
+  // Group
   getGroupMemberProfile(groupId: string, userId: string): Promise<Profile>
-  getRoomMemberProfile(roomId: string, userId: string): Promise<Profile>
   getGroupMemberIds(groupId: string): Promise<string[]>
+  leaveGroup(groupId: string): Promise<any>
+
+  // Room
+  getRoomMemberProfile(roomId: string, userId: string): Promise<Profile>
   getRoomMemberIds(roomId: string): Promise<string[]>
-  getMessageContent(messageId: string): Promise<ReadableStream>
-  leaveGroup(groupId: string): Promise<{}>
-  leaveRoom(roomId: string): Promise<{}>
+  leaveRoom(roomId: string): Promise<any>
+
+  // Rich menu
+  getRichMenu(richMenuId: string): Promise<RichMenuResponse>
+  createRichMenu(richMenu: RichMenu): Promise<string>
+  deleteRichMenu(richMenuId: string): Promise<any>
+  getRichMenuIdOfUser(userId: string): Promise<string>
+  linkRichMenuToUser(userId: string, richMenuId: string): Promise<any>
+  unlinkRichMenuFromUser(userId: string, richMenuId: string): Promise<any>
+  getRichMenuImage(richMenuId: string): Promise<Readable>
+  setRichMenuImage(richMenuId: string, data: Buffer | Readable, contentType?: string): Promise<any>
+  getRichMenuList(): Promise<Array<RichMenuResponse>>
 }
 ```
 
@@ -51,7 +69,9 @@ goes wrong, such as HTTP errors or parsing errors. You can catch them with the
 `.catch()` method of the promises. The detailed error handling is explained
 in [the Client guide](../guide/client.md).
 
-### `pushMessage(to: string, messages: Message | Message[]): Promise<{}>`
+### Message
+
+#### `pushMessage(to: string, messages: Message | Message[]): Promise<any>`
 
 It corresponds to the [Push message](https://developers.line.me/en/docs/messaging-api/reference/#send-push-message) API.
 
@@ -64,7 +84,7 @@ client.pushMessage('user_or_group_or_room_id', {
 })
 ```
 
-### `replyMessage(replyToken: string, messages: Message | Message[]): Promise<{}>`
+#### `replyMessage(replyToken: string, messages: Message | Message[]): Promise<any>`
 
 It corresponds to the [Reply message](https://developers.line.me/en/docs/messaging-api/reference/#send-reply-message) API.
 
@@ -79,7 +99,7 @@ client.replyMessage(event.replyToken, {
 })
 ```
 
-### `multicast(to: string[], messages: Message | Message[]): Promise<{}>`
+#### `multicast(to: string[], messages: Message | Message[]): Promise<any>`
 
 It corresponds to the [Multicast](https://developers.line.me/en/docs/messaging-api/reference/#send-multicast-messages) API.
 
@@ -93,7 +113,32 @@ client.multicast(['user_id_1', 'user_id_2', 'room_id_1'], {
 })
 ```
 
-### `getProfile(userId: string): Promise<Profile>`
+#### `getMessageContent(messageId: string): Promise<Readable>`
+
+It corresponds to the [Content](https://developers.line.me/en/docs/messaging-api/reference/#get-content) API.
+
+The argument is an ID of media messages, such as image, video, and audio. The ID
+can be retrieved from a message object of a message event.
+
+Please beware that what it returns is promise of [readable stream](https://nodejs.org/dist/latest/docs/api/stream.html#stream_readable_streams).
+You can pipe the stream into a file, an HTTP response, etc.
+
+``` js
+client.getMessageContent('message_id')
+  .then((stream) => {
+    stream.on('data', (chunk) => {
+      ...
+    })
+    stream.on('error', (err) => {
+      ...
+    })
+    stream.pipe(...)
+  })
+```
+
+### Profile
+
+#### `getProfile(userId: string): Promise<Profile>`
 
 It corresponds to the [Profile](https://developers.line.me/en/docs/messaging-api/reference/#get-profile) API.
 
@@ -105,7 +150,9 @@ client.getProfile('user_id').then((profile) => {
 });
 ```
 
-### `getGroupMemberProfile(groupId: string, userId: string): Promise<Profile>`
+### Group
+
+#### `getGroupMemberProfile(groupId: string, userId: string): Promise<Profile>`
 
 It corresponds to the [Group Member Profile](https://developers.line.me/en/docs/messaging-api/reference/#get-group-member-profile) API.
 
@@ -118,7 +165,33 @@ client.getGroupMemberProfile('group_id', 'user_id').then((profile) => {
 })
 ```
 
-### `getRoomMemberProfile(roomId: string, userId: string): Promise<Profile>`
+#### `getGroupMemberIds(groupId: string): Promise<string[]>`
+
+It corresponds to the [Group Member IDs](https://developers.line.me/en/docs/messaging-api/reference/#get-group-member-user-ids) API.
+
+*FYI: This feature is only available for LINE@ Approved accounts or official accounts.*
+
+The argument is a group ID and the method returns a promise of an array of user IDs.
+
+``` js
+client.getGroupMemberIds('group_id').then((ids) => {
+  ids.forEach((id) => console.log(id));
+})
+```
+
+#### `leaveGroup(groupId: string): Promise<any>`
+
+It corresponds to the [Leave group](https://developers.line.me/en/docs/messaging-api/reference/#leave-group) API.
+
+The argument is a group ID.
+
+``` js
+client.leaveGroup('group_id')
+```
+
+### Room
+
+#### `getRoomMemberProfile(roomId: string, userId: string): Promise<Profile>`
 
 It corresponds to the [Room Member Profile](https://developers.line.me/en/docs/messaging-api/reference/#get-room-member-profile) API.
 
@@ -131,46 +204,111 @@ client.getRoomMemberProfile('room_id', 'user_id').then((profile) => {
 })
 ```
 
-### `getGroupMemberIds(groupId: string): Promise<string[]>`
+#### `getRoomMemberIds(roomId: string): Promise<string[]>`
 
-It corresponds to the [Group Member IDs](https://developers.line.me/en/docs/messaging-api/reference/#get-group-member-user-ids) API.
+It corresponds to the [Room Member IDs](https://developers.line.me/en/docs/messaging-api/reference/#get-room-member-user-ids) API.
 
 *FYI: This feature is only available for LINE@ Approved accounts or official accounts.*
 
-The argument is a group ID and the method returns a promise of an array of user IDs.
+The argument is a room ID and the method returns a promise of an array of user IDs.
 
 ``` js
-client.getGroupMemberIds('group_id').then((ids) => {
+client.getRoomMemberIds('room_id').then((ids) => {
   ids.forEach((id) => console.log(id));
 })
 ```
 
-### `getRoomMemberIds(roomId: string): Promise<string[]>`
+#### `leaveRoom(roomId: string): Promise<any>`
 
-It corresponds to the [Room Member IDs](https://developers.line.me/en/docs/messaging-api/reference/#get-room-member-user-ids) API.
+It corresponds to the [Leave room](https://developers.line.me/en/docs/messaging-api/reference/#leave-room) API.
 
-*FYI: This feature is only available for LINE@ Approved accounts or official accounts.*
+The argument is a room ID.
 
-The argument is a room ID and the method returns a promise of an array of user IDs.
+``` js
+client.leaveGroup('room_id')
+```
+
+### Rich menu
+
+#### `getRichMenu(richMenuId: string): Promise<RichMenuResponse>`
+
+It corresponds to the [Get rich menu](https://developers.line.me/en/docs/messaging-api/reference/#get-rich-menu) API.
+
+The argument is a rich menu ID. The return type is [a rich menu response object](https://developers.line.me/en/docs/messaging-api/reference/#rich-menu-response-object).
 
 ``` js
-client.getRoomMemberIds('room_id').then((ids) => {
-  ids.forEach((id) => console.log(id));
+client.getRichMenu('rich_menu_id').then((richMenu) => {
+  console.log(richMenu.size);
+  console.log(richMenu.areas[0].bounds);
 })
 ```
 
-### `getMessageContent(messageId: string): Promise<ReadableStream>`
+#### `createRichMenu(richMenu: RichMenu): Promise<string>`
 
-It corresponds to the [Content](https://developers.line.me/en/docs/messaging-api/reference/#get-content) API.
+It corresponds to the [Create rich menu](https://developers.line.me/en/docs/messaging-api/reference/#create-rich-menu) API.
 
-The argument is an ID of media messages, such as image, video, and audio. The ID
-can be retrieved from a message object of a message event.
+The argument is [a rich menu object](https://developers.line.me/en/docs/messaging-api/reference/#rich-menu-object).
+For the detail of the object format, please refer to the official documentation.
+It returns the result rich menu ID.
+
+``` js
+client.createRichMenu({ size: { width: 2500, height: 1686 }, ... })
+  .then((richMenuId) => console.log(richMenuId))
+```
+
+#### `deleteRichMenu(richMenuId: string): Promise<any>`
+
+It corresponds to the [Delete rich menu](https://developers.line.me/en/docs/messaging-api/reference/#delete-rich-menu) API.
+
+The argument is a rich menu ID.
+
+``` js
+client.deleteRichMenu('rich_menu_id')
+```
+
+#### `getRichMenuIdOfUser(userId: string): Promise<string>`
+
+It corresponds to the [Get rich menu ID of user](https://developers.line.me/en/docs/messaging-api/reference/#get-rich-menu-id-of-user) API.
+
+The argument is a user ID. It returns a rich menu ID to be used with other APIs.
+
+``` js
+client.getRichMenuIdOfUser('user_id').then((richMenuId) => {
+  console.log(richMenuId);
+})
+```
+
+#### `linkRichMenuToUser(userId: string, richMenuId: string): Promise<any>`
+
+It corresponds to the [Link rich menu to user](https://developers.line.me/en/docs/messaging-api/reference/#link-rich-menu-to-user) API.
+
+The arguments are a user ID and a rich menu ID.
+
+``` js
+client.linkRichMenuToUser('user_id', 'rich_menu_id')
+```
+
+#### `unlinkRichMenuFromUser(userId: string, richMenuId: string): Promise<any>`
+
+It corresponds to the [Unlink rich menu from user](https://developers.line.me/en/docs/messaging-api/reference/#unlink-rich-menu-from-user) API.
+
+The arguments are a user ID and a rich menu ID.
+
+``` js
+client.unlinkRichMenuFromUser('user_id', 'rich_menu_id')
+```
+
+#### `getRichMenuImage(richMenuId: string): Promise<Readable>`
+
+It corresponds to the [Download rich menu image](https://developers.line.me/en/docs/messaging-api/reference/#download-rich-menu-image) API.
+
+The argument is a rich menu ID.
 
 Please beware that what it returns is promise of [readable stream](https://nodejs.org/dist/latest/docs/api/stream.html#stream_readable_streams).
 You can pipe the stream into a file, an HTTP response, etc.
 
 ``` js
-client.getMessageContent('message_id')
+client.getRichMenuImage('rich_menu_id')
   .then((stream) => {
     stream.on('data', (chunk) => {
       ...
@@ -182,22 +320,22 @@ client.getMessageContent('message_id')
   })
 ```
 
-### `leaveGroup(groupId: string): Promise<{}>`
+#### `setRichMenuImage(richMenuId: string, data: Buffer | Readable, contentType?: string): Promise<any>`
 
-It corresponds to the [Leave group](https://developers.line.me/en/docs/messaging-api/reference/#leave-group) API.
+It corresponds to the [Upload rich menu image](https://developers.line.me/en/docs/messaging-api/reference/#upload-rich-menu-image) API.
 
-The argument is a group ID.
+The 1st argument is a rich menu ID. For 2nd argument, a buffer or a readable
+stream of an image should be provided. For the restriction of the image, please
+refer to the official documentation. The last argument is optional. If it's not
+provided, the mime type will be guessted from `data`. Only `image/jpeg` or
+`image/png` is allowed for the content type.
 
 ``` js
-client.leaveGroup('group_id')
+client.setRichMenuImage('rich_menu_id', fs.createReadStream('./some_image.png'))
 ```
 
-### `leaveRoom(roomId: string): Promise<{}>`
-
-It corresponds to the [Leave room](https://developers.line.me/en/docs/messaging-api/reference/#leave-room) API.
+#### `getRichMenuList(): Promise<Array<RichMenuResponse>>`
 
-The argument is a room ID.
+It corresponds to the [Get rich menu list](https://developers.line.me/en/docs/messaging-api/reference/#get-rich-menu-list) API.
 
-``` js
-client.leaveGroup('room_id')
-```
+The return type is a list of [rich menu response objects](https://developers.line.me/en/docs/messaging-api/reference/#rich-menu-response-object).