1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
#!/usr/bin/env node
const firebase=require("firebase-admin");
const util=require("util");
// Potential TODO's:
// - Use collapseKey to collect notifications for particular rooms
// - But note that you cannot have more than 4 collapseKeys at a time;
// correctly managing this requires synchronisation between app and server
// of exactly what keys have disappeared in the meantime
firebase.initializeApp({
credential:firebase.credential.cert(require("./firebaseServiceAccountKey.json")),
databaseURL:"https://tomsg-83196.firebaseio.com",
});
const fieldConverters=new Map([
["token",(b)=>b.toString()],
["user",(b)=>b.toString()],
["to_user",(b)=>b.toString()],
["room",(b)=>b.toString()],
["message",(b)=>b.toString()],
["timestamp",(b)=>b.toString()], // Nanosecond timestamps are too close to 52-bit range
["online",(b)=>parseInt(b.toString(),10)],
]);
function typeConvertFields(fields){
for(const key of fields.keys()){
const conv=fieldConverters.get(key);
if(conv!=undefined)fields.set(key,conv(fields.get(key)));
}
}
function readFields(buffer){
const fields=new Map();
if(buffer.length==0)return fields;
let cursor=0;
while(true){
let idx=buffer.indexOf(32,cursor);
if(idx==-1){
console.error("ERR: Incomplete field in input line");
return null;
}
const key=String(buffer.slice(cursor,idx));
cursor=idx+1;
idx=buffer.indexOf(32,cursor);
if(idx==-1){
console.error("ERR: Incomplete field in input line");
return null;
}
const arglen=parseInt(String(buffer.slice(cursor,idx)),10);
if(arglen<0||arglen==null||isNaN(arglen)){
console.error("ERR: Invalid length in input line");
return null;
}
cursor=idx+1;
if(cursor+arglen>buffer.length){
console.error("ERR: Length larger than remaining line in input line");
return null;
}
const arg=buffer.slice(cursor,cursor+arglen);
cursor+=arglen;
fields.set(key,arg);
if(cursor==buffer.length)break;
if(buffer[cursor]!=32){
console.error("ERR: No space after argument in input line");
return null;
}
cursor++;
}
return fields;
}
function processMessage(type,fields){
switch(type){
case "message":
const user=fields.get("user");
const to_user=fields.get("to_user");
const room=fields.get("room");
const message=fields.get("message");
const token=fields.get("token");
const payload={
notification: {
title: room + " (" + user + ")",
body: message,
},
data: {
user: user,
room: room,
message: message,
}
};
firebase.messaging().sendToDevice(token,payload)
.then((response)=>{
const result=response.results[0];
const realToken=result.canonicalRegistrationToken;
if(result.error){
console.error("JS: Send error:",result.error.errorInfo);
console.log("delete_token "+to_user+" "+token);
} else if(realToken&&realToken!=token){
console.log("delete_token "+to_user+" "+token);
console.log("add_token "+to_user+" "+realToken);
}
})
.catch((err)=>{
console.error("JS: Early send error:",err);
});
break;
default:
console.error("JS: Unknown type '"+type+"'");
}
}
function handleInputLine(buffer){
let idx=buffer.indexOf(32);
if(idx==-1){
console.error("ERR: No space in input line");
return;
}
const type=String(buffer.slice(0,idx));
const fields=readFields(buffer.slice(idx+1));
if(fields==null)return;
typeConvertFields(fields);
processMessage(type,fields);
}
{
let buffer=null;
process.stdin.on("data",(data)=>{
const prevlen=buffer==null?0:buffer.length;
if(buffer)buffer=Buffer.concat([buffer,data]);
else buffer=data;
let cursor=0;
let lfidx=buffer.indexOf(10,prevlen);
while(lfidx!=-1){
handleInputLine(buffer.slice(cursor,lfidx));
cursor=lfidx+1;
lfidx=buffer.indexOf(10,cursor);
}
if(cursor>=buffer.length)buffer=null;
else buffer=Buffer.from(buffer.slice(cursor));
});
}
console.error("Firebase js plugin loaded!");
|
