How to search for string and cross-check

General
1

Hello everyone,
I am very new to Node Red and with help from the HA forum ( How to automatically retrieve device name from entity_id? - #7 by AleXSR7001 - Node-RED - Home Assistant Community ), I am trying to solve a problem.

So, I have a global defined as homeassistant.config. This is built as follows

inputdata: object
  areas: array[7]
  devices: array [25]
  entities: array[144]
    [0 … 9]
      0: object
         config_entry_id: "d25740dd25bb73"
         device_id: "f6af38b97d9"
         area_id: null
         disabled_by: "integration"
         entity_id: "sensor.ambient_light"
      1: object
         config_entry_id: "d2dd25bb73"
         device_id: "f6af7d9"
         area_id: null
         disabled_by: "integration"
         entity_id: "sensor.main_light"

and so on.
Now I am trying to find a string inside the "entity_id". So let's say the string is "ambient". I want it to find "ambient" in entity_id, then from that object get the device_id, then search through the array of devices and return the friendly_name of the matching device.

Probably sounds simple to all of you, but is proving to be complicated to me.
I am unable to find the string "ambient", so I am failing with step one already :see_no_evil:

So, here is where I am at right now.

[{"id":"aa642c6f.01afa","type":"tab","label":"Flow 4","disabled":false,"info":""},{"id":"ce4e8cef.b3c4a","type":"inject","z":"aa642c6f.01afa","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"ambient","payloadType":"str","x":90,"y":360,"wires":[["a328617b.422e"]]},{"id":"744fa604.4422c8","type":"function","z":"aa642c6f.01afa","name":"exact search (exists true/false)","func":"var findWhat = msg.payload;\nvar data = msg.inputdata;\nmsg.payload = data.entities.filter(e => {\n    try {\n        var conditions = e.conditions[0].condition\n        if(conditions.includes(findWhat)) {\n            return true;\n        }\n    } catch {\n        \n    }\n    return false\n});\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":590,"y":360,"wires":[["d11e148d.d87bb8","30041c9c.853d44"]]},{"id":"a328617b.422e","type":"change","z":"aa642c6f.01afa","name":"","rules":[{"t":"set","p":"inputdata","pt":"msg","to":"homeassistant.config","tot":"global"}],"action":"","property":"","from":"","to":"","reg":false,"x":310,"y":360,"wires":[["744fa604.4422c8","607e9988.3398c8"]]},{"id":"d11e148d.d87bb8","type":"debug","z":"aa642c6f.01afa","name":"","active":true,"tosidebar":true,"console":false,"tostatus":true,"complete":"true","targetType":"full","statusVal":"payload","statusType":"auto","x":1050,"y":360,"wires":[]},{"id":"607e9988.3398c8","type":"function","z":"aa642c6f.01afa","name":"partial search (exists true/false) (case insensitive)","func":"var findWhat = msg.payload.toLowerCase();\nvar data = msg.inputdata;\nmsg.payload = data.entities.filter(e => {\n    try {\n        var conditions = e.conditions[0].condition;\n        var found = conditions.some(e => {\n            return (e && e.length) ? e.toLowerCase().includes(findWhat) : false\n        })\n        return found;\n    } catch {\n    }\n    return null\n});\nreturn msg;\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":650,"y":420,"wires":[["c8cd13ba.4b378","7c039174.c795d"]]},{"id":"c8cd13ba.4b378","type":"debug","z":"aa642c6f.01afa","name":"","active":true,"tosidebar":true,"console":false,"tostatus":true,"complete":"true","targetType":"full","statusVal":"payload","statusType":"auto","x":1090,"y":420,"wires":[]},{"id":"30041c9c.853d44","type":"switch","z":"aa642c6f.01afa","name":"Found?","property":"payload","propertyType":"msg","rules":[{"t":"nempty"}],"checkall":"true","repair":false,"outputs":1,"x":810,"y":320,"wires":[["19b7b63f.b0b46a"]]},{"id":"19b7b63f.b0b46a","type":"debug","z":"aa642c6f.01afa","name":"first found item","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":980,"y":320,"wires":[]},{"id":"7c039174.c795d","type":"switch","z":"aa642c6f.01afa","name":"Found?","property":"payload","propertyType":"msg","rules":[{"t":"nempty"}],"checkall":"true","repair":false,"outputs":1,"x":800,"y":480,"wires":[["f6d949dd.411978"]]},{"id":"f6d949dd.411978","type":"debug","z":"aa642c6f.01afa","name":"first found item","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":970,"y":480,"wires":[]}]

but the message is always undefined, so I am guessing that my way of searching is not appropriate for the input data.

Could someone here maybe help me find a solution? :slight_smile:

Could the problem be the ‘catch’ command. I just saw that the editor states that the optional catch binding is only available in ES10.

Thank you all for your help.
Alex

2

It is much easier for us to help you if you post the code of your function node directly - saves us always having to load lots of flows.

3

Sorry, of course :slight_smile:
Exact match

var findWhat = msg.payload;
var data = msg.inputdata;
msg.payload = data.entities.filter(e => {
    try {
        var conditions = e.conditions[0].condition
        if(conditions.includes(findWhat)) {
            return true;
        }
    } catch {
        
    }
    return false
});
return msg;

Partial match:

var findWhat = msg.payload.toLowerCase();
var data = msg.inputdata;
msg.payload = data.entities.filter(e => {
    try {
        var conditions = e.conditions[0].condition;
        var found = conditions.some(e => {
            return (e && e.length) ? e.toLowerCase().includes(findWhat) : false
        })
        return found;
    } catch {
    }
    return null
});
return msg;
4

I can't see a conditions array inside the entities object?

e.entity_id.indexOf(findWhat)

Will return a number of zero or above if it finds the string.

if ( e.entity_id && (e.entity_id.indexOf(findWhat) > -1) ) return true
else return false

Is probably all you need. You don't need the try, I've included a test to make sure that e.entity_id exists.

5

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