A simple way to check if an input matches an entry in a text file

README.md

A simple way to check if a value is contained in text file.

flow.json

[{"id":"e025a6f.56cead8","type":"file in","z":"5811904c.b5318","name":"List Of Team Members","filename":"/Users/tim/Desktop/teammembers.txt","format":"utf8","x":764,"y":255,"wires":[["dae4c5b9.339c28","25ee17ce.92e9"]]},{"id":"dae4c5b9.339c28","type":"function","z":"5811904c.b5318","name":"Check for Match","func":"var arrayOfTextEntries = msg.payload.split(\";\");\nvar entryToLookFor = msg.entryToLookFor;\nif (arrayOfTextEntries.indexOf(entryToLookFor)>=1){\n    msg.found = true;\n} else {\n    msg.found = false;\n}\nreturn msg;","outputs":1,"noerr":0,"x":757,"y":404,"wires":[["5ef30987.1894a8"]]},{"id":"dabed1d5.fda648","type":"inject","z":"5811904c.b5318","name":"String to check for","topic":"","payload":"Bob@minions.com","payloadType":"str","repeat":"","crontab":"","once":false,"x":141,"y":256,"wires":[["d6ab0cc1.e24078"]]},{"id":"d6ab0cc1.e24078","type":"function","z":"5811904c.b5318","name":"Format msg for later check","func":"msg.entryToLookFor = msg.payload;\nreturn msg;","outputs":1,"noerr":0,"x":395,"y":256,"wires":[["e025a6f.56cead8"]]},{"id":"5ef30987.1894a8","type":"debug","z":"5811904c.b5318","name":"","active":true,"console":"false","complete":"found","x":1039,"y":405,"wires":[]},{"id":"25ee17ce.92e9","type":"debug","z":"5811904c.b5318","name":"","active":true,"console":"false","complete":"false","x":1040,"y":255,"wires":[]},{"id":"706f96fc.fe8ec","type":"comment","z":"5811904c.b5318","name":"A simple way to check if an input matches an entry in a text file","info":"","x":277.5,"y":152,"wires":[]},{"id":"2894ccfa.6c994c","type":"comment","z":"5811904c.b5318","name":"Output the contents of the file for testing purposes","info":"So that we can check we have found the file and what it contains","x":1157.5,"y":210,"wires":[]},{"id":"ad8a618e.5ea59","type":"comment","z":"5811904c.b5318","name":"Have we found the string in the file?","info":"","x":1111.5,"y":369,"wires":[]},{"id":"8488d230.48f27","type":"comment","z":"5811904c.b5318","name":"Full path to your text file","info":"eg /Users/tim/Desktop/teammembers.txt\n\nThis flow is written to accept a text file \nwith entries separated by semi-colons eg.\n\nDave@minions.com;Stuart@minions.com;Bob@minions.com;Jerry@minions.com;Carl@minions.com;Kevin@minions.com;Tim@minions.com;Mark@minions.com;Phil@minions.com;John@minions.com;Josh@minions.com;Steve@minions.com;Donny@minions.com;Ken@minions.com;Mike@minions.com;Paul@minions.com;Lance@minions.com;Larry@minions.com;Jorge@minions.com;Tom@minions.com;Norbert@minions.com;Chris@minions.com;Darwin@minions.com;\n\nThe separator is defined and can be changed in the split function within the Check for Match function","x":774.5,"y":212,"wires":[]},{"id":"8f04fe63.b52cc8","type":"comment","z":"5811904c.b5318","name":"Add an entryToLookFor value to the msg object","info":"","x":455.5,"y":213,"wires":[]},{"id":"286bcc2.b1f9334","type":"comment","z":"5811904c.b5318","name":"Convert the string returned by the file node to an array and check if msg.entryToLookFor is in that array","info":"","x":1019.5,"y":448,"wires":[]}]

Hi Tim

I'am on windows OS.
I would ask you how the file you are using in /Users/tim/Desktop/teammembers.txt is composed.
In the "List of team members" block, i wrote the path to my file: C:\Users\s.bianchi\Desktop\lista.txt
this is a simple txt file with some names on one line.
I inject always a name within the file, what i get at the output is always a false response, but the content of the whole file is correclty displayed.
Could you help me?

Thanks regards.