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parse-server/triggers.js at master · nicwise/parse-server · GitHub
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triggers.js
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// triggers.js
var
Parse
=
require
(
'parse/node'
)
.
Parse
;
var
Types
=
{
beforeSave
:
'beforeSave'
,
afterSave
:
'afterSave'
,
beforeDelete
:
'beforeDelete'
,
afterDelete
:
'afterDelete'
}
;
var
getTrigger
=
function
(
className
,
triggerType
)
{
if
(
Parse
.
Cloud
.
Triggers
&&
Parse
.
Cloud
.
Triggers
[
triggerType
]
&&
Parse
.
Cloud
.
Triggers
[
triggerType
]
[
className
]
)
{
return
Parse
.
Cloud
.
Triggers
[
triggerType
]
[
className
]
;
}
return
undefined
;
}
;
var
getRequestObject
=
function
(
triggerType
,
auth
,
parseObject
,
originalParseObject
)
{
var
request
=
{
triggerName
:
triggerType
,
object
:
parseObject
,
master
:
false
}
;
if
(
originalParseObject
)
{
request
.
original
=
originalParseObject
;
}
if
(
!
auth
)
{
return
request
;
}
if
(
auth
.
isMaster
)
{
request
[
'master'
]
=
true
;
}
if
(
auth
.
user
)
{
request
[
'user'
]
=
auth
.
user
;
}
// TODO: Add installation to Auth?
if
(
auth
.
installationId
)
{
request
[
'installationId'
]
=
auth
.
installationId
;
}
return
request
;
}
;
// Creates the response object, and uses the request object to pass data
// The API will call this with REST API formatted objects, this will
// transform them to Parse.Object instances expected by Cloud Code.
// Any changes made to the object in a beforeSave will be included.
var
getResponseObject
=
function
(
request
,
resolve
,
reject
)
{
return
{
success
:
function
(
)
{
var
response
=
{
}
;
if
(
request
.
triggerName
===
Types
.
beforeSave
)
{
response
[
'object'
]
=
request
.
object
.
toJSON
(
)
;
}
return
resolve
(
response
)
;
}
,
error
:
function
(
error
)
{
throw
new
Parse
.
Error
(
Parse
.
Error
.
SCRIPT_FAILED
,
error
)
;
}
}
}
;
// To be used as part of the promise chain when saving/deleting an object
// Will resolve successfully if no trigger is configured
// Resolves to an object, empty or containing an object key. A beforeSave
// trigger will set the object key to the rest format object to save.
// originalParseObject is optional, we only need that for befote/afterSave functions
var
maybeRunTrigger
=
function
(
triggerType
,
auth
,
parseObject
,
originalParseObject
)
{
if
(
!
parseObject
)
{
return
Promise
.
resolve
(
{
}
)
;
}
return
new
Promise
(
function
(
resolve
,
reject
)
{
var
trigger
=
getTrigger
(
parseObject
.
className
,
triggerType
)
;
if
(
!
trigger
)
return
resolve
(
{
}
)
;
var
request
=
getRequestObject
(
triggerType
,
auth
,
parseObject
,
originalParseObject
)
;
var
response
=
getResponseObject
(
request
,
resolve
,
reject
)
;
trigger
(
request
,
response
)
;
}
)
;
}
;
// Converts a REST-format object to a Parse.Object
// data is either className or an object
function
inflate
(
data
,
restObject
)
{
var
copy
=
typeof
data
==
'object'
?
data
:
{
className
:
data
}
;
for
(
var
key
in
restObject
)
{
copy
[
key
]
=
restObject
[
key
]
;
}
return
Parse
.
Object
.
fromJSON
(
copy
)
;
}
module
.
exports
=
{
getTrigger
:
getTrigger
,
getRequestObject
:
getRequestObject
,
inflate
:
inflate
,
maybeRunTrigger
:
maybeRunTrigger
,
Types
:
Types
}
;
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