我已经使用pubnub在Ionic3中实现了聊天。它适用于群聊。用于群聊的频道是“group1-ch”。我在这里添加了我的代码。我在开发一对一聊天方面遇到了一些困难。
import {Injectable, EventEmitter} from '@angular/core';
declare var PUBNUB;
type OnMessageFn = (message, envelope, channelOrGroup, time, channel) => void;
export enum PubNubEventType {
MESSAGE,
CONNECT,
DISCONNECT,
RECONNECT,
PUBLISHED,
HISTORY,
PRESENCE
}
export class PubNubEvent {
constructor(public type: PubNubEventType, channel:string, public value: any) {}
}
@Injectable()
export class PubNubService {
pubnub:any;
/**
* Call this method after platform becomes to be ready
*/
// init() {
constructor() {
}
connectionuuid(uuid){
this.pubnub = PUBNUB({
subscribe_key: '*********************************',
publish_key: '*********************************',
uuid:uuid,
ssl: true,
secret_key: '**************************************'
});
}
subscribe(channel:string):EventEmitter<PubNubEvent> {
let eventEmitter:EventEmitter<PubNubEvent> = new EventEmitter<PubNubEvent>();
this.pubnub.subscribe({
channel : channel,
withPresence: true,
presence : (message) => {
eventEmitter.emit(new PubNubEvent(PubNubEventType.PRESENCE, channel, message));
},
message : (message) => {
eventEmitter.emit(new PubNubEvent(PubNubEventType.MESSAGE, channel, message));
},
connect: (message) => {
eventEmitter.emit(new PubNubEvent(PubNubEventType.CONNECT, channel, message));
},
disconnect: (message) => {
eventEmitter.emit(new PubNubEvent(PubNubEventType.DISCONNECT, channel, message));
},
reconnect: (message) => {
eventEmitter.emit(new PubNubEvent(PubNubEventType.RECONNECT, channel, message));
},
error: (error) => {
eventEmitter.error(error);
},
});
return eventEmitter;
}
publish(channel:string, message:any, store_in_history:boolean = true):EventEmitter<PubNubEvent> {
let eventEmitter:EventEmitter<PubNubEvent> = new EventEmitter<PubNubEvent>();
this.pubnub.publish({
channel: channel,
message: message,
store_in_history: store_in_history,
callback : (message) => {
eventEmitter.emit(new PubNubEvent(PubNubEventType.PUBLISHED, channel, message));
},
// Executes on a publish error.
error: (error) => {
eventEmitter.error(error);
}
});
return eventEmitter;
}
individual_chat(channel:string, message:any, store_in_history:boolean = true):EventEmitter<PubNubEvent> {
let eventEmitter:EventEmitter<PubNubEvent> = new EventEmitter<PubNubEvent>();
this.pubnub.publish({
channel: channel,
message: message,
store_in_history: store_in_history,
callback : (message) => {
eventEmitter.emit(new PubNubEvent(PubNubEventType.PUBLISHED, channel, message));
},
// Executes on a publish error.
error: (error) => {
eventEmitter.error(error);
}
});
return eventEmitter;
}
history(channel: string, count:number = 100, start:number = null, end:number = null, reverse:boolean = true, include_token: boolean = true):EventEmitter<PubNubEvent> {
let eventEmitter:EventEmitter<PubNubEvent> = new EventEmitter<PubNubEvent>();
this.pubnub.history({
channel: channel,
callback: (messages) => {
eventEmitter.emit(new PubNubEvent(PubNubEventType.HISTORY, channel, messages));
},
error: (error) => {
eventEmitter.error(error);
},
count: count,
start: start,
end: end,
reverse: reverse,
include_token: include_token
});
return eventEmitter;
}
here_now(channel: string, count:number = 100, start:number = null, end:number = null, reverse:boolean = true, include_token: boolean = true):EventEmitter<PubNubEvent>{
let eventEmitter:EventEmitter<PubNubEvent> = new EventEmitter<PubNubEvent>();
this.pubnub.here_now({
channel: channel,
callback: (m) => {
eventEmitter.emit(new PubNubEvent(PubNubEventType.PRESENCE, channel, m));
},
error: (error) => {
eventEmitter.error(error);
},
count: count,
start: start,
end: end,
reverse: reverse,
include_token: include_token
});
return eventEmitter;
}
where_now(channel: string, count:number = 100, start:number = null, end:number = null, reverse:boolean = true, include_token: boolean = true):EventEmitter<PubNubEvent>{
let eventEmitter:EventEmitter<PubNubEvent> = new EventEmitter<PubNubEvent>();
this.pubnub.where_now({
uuid: channel,
callback: (m) => {
eventEmitter.emit(new PubNubEvent(PubNubEventType.PRESENCE, channel, m));
},
error: (error) => {
eventEmitter.error(error);
},
count: count,
start: start,
end: end,
reverse: reverse,
include_token: include_token
});
return eventEmitter;
}
}
谢谢和问候
Anand Raj
答案 0 :(得分：2)
让我使用更具体的名字：Anand，Craig，John。每个用户都应订阅入站频道，他们会收到有关邀请的通知：
inbound.anand inbound.craig inbound.john 现在，如果您知道要联系的用户名，现在可以随时知道要向另一个入站频道发送（发布）邀请的频道。您可以发送消息邀请他们聊天，并将频道作为单独的值提供：
{
"message": "Hi, this is Anand. I would like to invite you to chat with me.",
"chat_channel": "abc123",
"sender_id": "anand"
}
这只是一个简单的示例消息，可能更复杂但重点是，您想要向您要邀请的人发送消息并提供频道名称（它可以是随机生成的字符串或类似于andand_craig ，只要它是使用唯一用户名的Anand和Craig的唯一通道名称。）
您的用户界面将为受邀用户提供一种方式，可以单击接受或拒绝按钮来响应邀请。
inbox.anand或提供的chat_channel，其中 anand 已经订阅，然后订阅提供的chat_channel，开始与 anand 聊天。这是一种相当简化的设计模式，但应该提供一些有关如何在两个人甚至一群人之间发起对话的见解。
有关推荐设计模式的更多详细信息：
您还可以查看使用内置聊天功能的PubNub's ChatEngine framework。对于Angular，请参阅Simple Angular ChatEngine example。