LAE

node:Select_File_Using_File_Size
bretype:core::Composite
editor:Label=Select File Using File Size
editor:sortkey=57627c2a0ea96330
editor:icon=Python.ico
output:57627c4b7c2740af/=
outlink:0=/=testFileSizeImp.510d1e8b08c5651f
outputxy:0=510,130
outputrotation:0=0
inclockxy:Inclock=20,30
outclockxy:Outclock=400,30
prop:DefaultAction=Edit
editor:XY=600,160
editor:UsageDoc=Checks the size of a file and outputs the file name if the file is not empty or outputs the specified default file name.
editor:Doc=Checks the size of a file and outputs the file name if the file is not empty or outputs the specified default file name.
editor:propdef=File Name|filename|General||Not Blank
editor:propdef=Default File Name|filename|General||Not Blank
editor:propdoc=File Name=The name of the file whose file size is to be checked.
editor:propdoc=File Name=
editor:propdoc=File Name=Mandatory property.
editor:propdoc=Default File Name=The name of the file to be selected if the file 
editor:propdoc=Default File Name=specified by the 'File Name' property is empty.
editor:propdoc=Default File Name=
editor:propdoc=Default File Name=Mandatory Property.
node:testFileSizeImp
bretype:core::Python
editor:Label=testFileSizeImp
editor:sortkey=510d1e0e27e55c56_2
output:510d1e8b08c5651f/out1=
prop:DefaultFileName={{^Default File Name^}}
prop:FileName={{^File Name^}}
prop:Mandatory=false
prop:Python2Implementation=<<EOX
import braininfo
import os

PROPERTY_BASE = "ls.brain.node.testFileSize"

def setup(brainNodeControlObj, BrainNodeClass):
	''' Must return a class that inherits from BrainNodeClass. '''	
	class BrainNode(BrainNodeClass):
		def initialize(self):
			''' Called at node initialization, before first pump.'''
			super(BrainNode, self).initialize()
			
			self.logMedium("Initializing the testFileSize node")
			
			# Obtain the values set on the node parameters
			self.FileName = self.properties.getString(PROPERTY_BASE + ".FileName")
			self.DefaultFileName = self.properties.getString(PROPERTY_BASE + ".DefaultFileName")
			
			# Specify the name of the output field to store the selected file
			self.outputFileName = "FileName"
			
			#Setup the output metadata
			om = self.newMetadata()
			om.append(self.outputFileName, "string")
			self.outputs[0].metadata = om

		def finalize(self, val):
			''' Called at node end, after last pump call. '''
			super(BrainNode, self).finalize(val)

		def pump(self, quant):
			''' Will continue to be called until False is returned.

			Only a small amount of work should be done in pump without checking
			quant.permitsRunning.  When that returns False, return from pump
			with a True value to be called again, a False value when finished.'''
			while quant.permitsRunning(self):

				# Get the path of the file to be examined and open it for reading
				testFilePath = self.FileName
				# Replace any Windows-style path separators
				testFilePath = testFilePath.replace("\\" ,"/")
				
				# Get the file properties and check if the file is empty
				statinfo = os.stat(testFilePath)
				if statinfo.st_size > 0:
					# The file has some contents
					selectedFile = testFilePath
				else:
					# Use the default file
					selectedFile = self.DefaultFileName
				
				# Now output the selected file path				
				outputRec = self.outputs[0].newRecord()
				outputRec[0] = str(selectedFile)
				self.outputs[0].write(outputRec)
				return False
				
			# finished your quantum, you want pump called again
			return True  

	# If you implement your logic here, you don't need code below. If you want
	# to inherit, and add more logic at next level, uncomment below code
	
	# py3File = brainNodeControlObj.properties.getString("ls.brain.node.BrainPython.python3ImplementationFile") 
	# braininfo.loadModule(py3File, "py3", brainNodeControlObj)
	# import py3
	# BrainNodeImpl = py3.setup(brainNodeControlObj, BrainNode)
	# return BrainNodeImpl

	return BrainNode
EOX
editor:XY=390,130
editor:propdef=FileName|string|General|ls.brain.node.testFileSize.FileName|Not Blank
editor:propdef=DefaultFileName|string|General|ls.brain.node.testFileSize.DefaultFileName|Not Blank
end:testFileSizeImp

end:Select_File_Using_File_Size_2