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runtime.coffee
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runtime.coffee
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_ = require('underscore')
functions = require('./functions')
Utils = require('./utils')
class Runtime
constructor: ->
@setupGlobal()
@setupFunctions()
@defaultLocale: 'en_US'
@defaultCurrencyCode: 'USD'
@defaultCurrencySymbol: '$'
@defaultTimeZone: 'UTC'
global: null
expressions: []
form: {}
mode: null
values: {}
repeatable: null
hooks: {}
event: {}
events:
on: {}
change: {}
click: {}
customVariables: {}
locale: @defaultLocale
currencyCode: @defaultCurrencyCode
currencySymbol: @defaultCurrencySymbol
variables: {}
results: []
dataNames: {}
elements: []
elementsByKey: {}
elementsByDataName: {}
statusesByValue: {}
featureIsNew: true
showErrors: false
asyncCallbacks: {}
asyncCount: 0
scriptInitialized: false
hooksInitialized: false
isCalculation: false
extraVariableNames: [
'locale',
'language',
'timeZone',
'decimalSeparator',
'groupingSeparator',
'currencySymbol',
'currencyCode',
'country',
'deviceIdentifier',
'deviceModel',
'deviceManufacturer',
'platform',
'platformVersion',
'application',
'applicationVersion',
'applicationBuild',
'userEmail',
'userRoleName',
'recordStatus',
'recordSystemCreatedAt',
'recordSystemUpdatedAt',
'recordClientCreatedAt',
'recordClientUpdatedAt',
'recordProject',
'recordProjectName',
'recordGeometry',
'recordAltitude',
'recordVerticalAccuracy',
'recordHorizontalAccuracy',
'featureCreatedAt',
'featureUpdatedAt',
'featureGeometry'
]
clearValues: ->
# Clear the values so that the references from the `with` statements remain
# on the same root object. If we create a new @variables it won't stay the same
# across executions. This is so the $field variables work in the form-level scripts.
delete @variables[prop] for prop of @variables
setupValues: ->
@clearValues()
state = @variables
names = @dataNames
for key of names
state["$#{names[key]}"] = undefined
for key of @values
value = @values[key]
element = @elementsByKey[key]
if element and @dataNames[key]
state["$#{@dataNames[key]}"] = Utils.valueForElement(element, value)
for name in @extraVariableNames
state["$$#{name}"] = @[name]
for name of @customVariables
state["#{name}"] = @customVariables[name]
functions.CONFIGURE(@, false)
@initializeScriptIfNecessary()
prepare: ->
@elements = Utils.flattenElements(@form.elements, true, true)
if @form.status_field and @form.status_field.choices
_.each @form.status_field.choices, (choice) =>
@statusesByValue[choice.value] = choice.label
_.each @elements, (element) =>
@elementsByKey[element.key] = element
@elementsByDataName[element.data_name] = element
@dataNames[element.key] = element.data_name
invokeAsync: (func, args, callback) ->
id = ++@asyncCount
@asyncCallbacks[id] = callback
func.apply(@, args.concat([id]))
finishAsync: ->
id = +@callbackID
callback = @asyncCallbacks[id]
delete @asyncCallbacks[id]
@resetResults()
@isCalculation = false
callback.apply(@, @callbackArguments)
$$runtime.results
initializeScriptIfNecessary: ->
return if @scriptInitialized
@scriptInitialized = true
script = if _.isString(@form.script) then @form.script else ''
if @form.field_effects
script = """
APPLYFIELDEFFECTS(#{JSON.stringify(@form.field_effects)});
#{script}
"""
`with (this.variables) { eval(script) }`
ON 'extension-message', (event) =>
functions.extensionMessageHandlers[event.id]?(event)
return
hookName: (name) ->
return null unless name?
'hook_' + name
hooksByName: (name) ->
@events[@hookName(name)] ?= []
hooksByParams: (name, param) ->
@hooksByName(name)[@hookName(param)] ?= []
removeHook: (name, param, callback) ->
param = @hookName(param) if param?
if param? and callback?
@hooksByName(name)[param] = _.without(@hooksByName(name)[param], callback)
else if param?
delete @hooksByName(name)[param]
else
@events[@hookName(name)] = []
addHook: (name, param, callback) ->
@hooksByParams(name, param).push(callback)
resetResults: ->
# When the global script runs, start with the results that were captured in that tick
# This lets function calls at global scope eventually take effect the first time an event
# is triggered (load-record).
$$runtime.results = if @hooksInitialized then [] else @results
@hooksInitialized = true
trigger: ->
@resetResults()
@setupValues()
if @event.field?
[name, param] = [@event.name, @event.field]
else
[name, param] = [@event.name, null]
hooks = @hooksByParams(name, param)
return $$runtime.results unless hooks?.length
@isCalculation = false
hook.call(@, @event) for hook in hooks
$$runtime.results
evaluate: ->
@resetResults()
@setupValues()
@isCalculation = true
for context in @expressions
$$runtime.results.push(@evaluateExpression(context))
$$runtime.results
evaluateExpression: (context) ->
variables = @variables
thisVariableName = "$#{context.dataName}"
try
$$runtime.showErrors = false
variables.$$current = $$runtime.$$currentValue = variables[thisVariableName]
stringValue = rawValue = $$runtime.$$result = undefined
if context.expression and context.expression.length > 0
evalResult = undefined
`with (variables) { evalResult = eval(context.expression) }`
rawValue = @coalesce($$runtime.$$result, evalResult)
stringValue = @formatValue(rawValue)
variables[thisVariableName] = if _.isNumber(rawValue) or _.isDate(rawValue) then rawValue else stringValue
return @createResult(context.key, rawValue, stringValue, null, $$runtime.showErrors)
catch ex
console.log "JS ERROR : #{context.dataName} : #{ex.toString()}"
variables[thisVariableName] = undefined
return @createResult(context.key, null, null, ex.toString(), true)
coalesce: ->
_.find Utils.toArray(arguments), (argument) -> not _.isUndefined(argument)
createResult: (key, rawValue, stringValue, err, showErrors) ->
if showErrors
if err
err = err.toString()
else if _.isUndefined(rawValue)
err = '[Undefined]'
else if _.isNaN(rawValue)
err = '[Not a Number]'
else if _.isFunction(rawValue)
err = '[Function]'
else if _.isArray(rawValue)
err = '[Array]'
else if _.isDate(rawValue)
err = null
else if _.isObject(rawValue)
err = '[Object]'
else
err = null
{ type: 'calculation', key: key, value: stringValue, error: err }
formatValue: (value) ->
if _.isUndefined(value)
value = null
else if _.isNull(value)
value = null
else if _.isNaN(value)
value = null
else if _.isNumber(value)
value = value
else if _.isDate(value)
value = Utils.formatMachineDate(value)
else if _.isArray(value)
value = value.map(@formatValue).join(', ')
else if _.isRegExp(value)
value = value.toString()
else if _.isFunction(value)
value = null
value
setupGlobal: ->
@global = undefined
try
@global = Function("return this")()
catch e
@global = window
# global exports
@global.$$runtime = @
@global.$$prepare = @prepare.bind(@)
@global.$$evaluate = @evaluate.bind(@)
@global.$$trigger = @trigger.bind(@)
@global.$$finishAsync = @finishAsync.bind(@)
setupFunctions: ->
@functions ||= {}
specialFunctions =
ALERT: true
APPLYFIELDEFFECTS: true
CURRENTLOCATION: true
INFERENCE: true
INVALID: true
LOADFILE: true
LOADFORM: true
LOADRECORDS: true
MESSAGEBOX: true
OFF: true
ON: true
OPENURL: true
OPENEXTENSION: true
PROGRESS: true
RECOGNIZETEXT: true
REQUEST: true
SETCHOICEFILTER: true
SETCHOICES: true
SETCONFIGURATION: true
SETGEOMETRY: true
SETLOCATION: true
SETSTATUS: true
SETSTATUSFILTER: true
SETPROJECT: true
SETDESCRIPTION: true
SETDISABLED: true
SETHIDDEN: true
SETLABEL: true
SETMAXLENGTH: true
SETMINLENGTH: true
SETREQUIRED: true
SETTIMEOUT: true
CLEARTIMEOUT: true
SETINTERVAL: true
CLEARINTERVAL: true
SETVALUE: true
SETFORMATTRIBUTES: true
STORAGE: true
checkCall = (name, func, args) =>
if @isCalculation and specialFunctions[name]
ERROR(name + ' cannot be used in a calculation')
exportObject = (exportName) =>
object = functions[exportName]
wrapper =
if _.isFunction(functions[exportName])
->
checkCall(exportName, object, arguments)
object.apply(functions, arguments)
else
object
@functions[exportName] = object
@global[exportName] = wrapper
for name of functions
exportObject(name)
module.exports = new Runtime