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SocketIORouter.ts
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SocketIORouter.ts
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'use strict'
;
/**
* This is the Socket.IO Router. It routes the Messages between the
* components of the Server. The components are at the moment: pad and timeslider
*/
/*
* 2011 Peter 'Pita' Martischka (Primary Technology Ltd)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import
{
MapArrayType
}
from
"../types/MapType"
;
import
{
SocketModule
}
from
"../types/SocketModule"
;
import
log4js
from
'log4js'
;
import
settings
from
'../utils/Settings'
;
import
{
anonymizeIp
}
from
'../utils/anonymizeIp'
;
const
stats
=
require
(
'../../node/stats'
)
const
logger
=
log4js
.
getLogger
(
'socket.io'
)
;
/**
* Saves all components
* key is the component name
* value is the component module
*/
const
components
:
MapArrayType
<
any
>
=
{
}
;
let
io
:
any
;
/** adds a component
*
@param
{
string
} moduleName
*
@param
{
Module
} module
*/
exports
.
addComponent
=
(
moduleName
:
string
,
module
:
SocketModule
)
=>
{
if
(
module
==
null
)
return
exports
.
deleteComponent
(
moduleName
)
;
components
[
moduleName
]
=
module
;
module
.
setSocketIO
(
io
)
;
}
;
/**
* removes a component
*
@param
{
Module
} moduleName
*/
exports
.
deleteComponent
=
(
moduleName
:
string
)
=>
{
delete
components
[
moduleName
]
;
}
;
/**
* sets the socket.io and adds event functions for routing
*
@param
{
Object
} _io the socket.io instance
*/
exports
.
setSocketIO
=
(
_io
:
any
)
=>
{
io
=
_io
;
io
.
sockets
.
on
(
'connection'
,
(
socket
:
any
)
=>
{
const
ip
=
anonymizeIp
(
socket
.
request
.
ip
,
settings
.
ipLogging
)
;
logger
.
debug
(
`
${
socket
.
id
}
connected from IP
${
ip
}
`
)
;
// wrap the original send function to log the messages
socket
.
_send
=
socket
.
send
;
socket
.
send
=
(
message
:
string
)
=>
{
logger
.
debug
(
`to
${
socket
.
id
}
:
${
JSON
.
stringify
(
message
)
}
`
)
;
socket
.
_send
(
message
)
;
}
;
// tell all components about this connect
for
(
const
i
of
Object
.
keys
(
components
)
)
{
components
[
i
]
.
handleConnect
(
socket
)
;
}
socket
.
on
(
'message'
,
(
message
:
any
,
ack
:
any
=
(
)
=>
{
}
)
=>
(
async
(
)
=>
{
if
(
!
message
.
component
||
!
components
[
message
.
component
]
)
{
throw
new
Error
(
`unknown message component:
${
message
.
component
}
`
)
;
}
logger
.
debug
(
`from
${
socket
.
id
}
:`
,
message
)
;
return
await
components
[
message
.
component
]
.
handleMessage
(
socket
,
message
)
;
}
)
(
)
.
then
(
(
val
)
=>
ack
(
null
,
val
)
,
(
err
)
=>
{
logger
.
error
(
`Error handling
${
message
.
component
}
message from
${
socket
.
id
}
:
${
err
.
stack
||
err
}
`
)
;
ack
(
{
name
:
err
.
name
,
message
:
err
.
message
}
)
;
// socket.io can't handle Error objects.
}
)
)
;
socket
.
on
(
'disconnect'
,
(
reason
:
string
)
=>
{
logger
.
debug
(
`
${
socket
.
id
}
disconnected:
${
reason
}
`
)
;
// store the lastDisconnect as a timestamp, this is useful if you want to know
// when the last user disconnected. If your activePads is 0 and totalUsers is 0
// you can say, if there has been no active pads or active users for 10 minutes
// this instance can be brought out of a scaling cluster.
stats
.
gauge
(
'lastDisconnect'
,
(
)
=>
Date
.
now
(
)
)
;
// tell all components about this disconnect
for
(
const
i
of
Object
.
keys
(
components
)
)
{
components
[
i
]
.
handleDisconnect
(
socket
)
;
}
}
)
;
}
)
;
}
;
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