Scrape: Random index?

Configuration
1

Hi everyone,

I’m trying to cast a random wallpaper to my chromecasts with no luck.

I successfuly configure a script to cast a sensor value containing the url but the problem is I can’t randomize the item selection

This is my scrape sensor

  - platform: scrape
    resource: https://wallpaper.dog/coolest-gaming-wallpapers
    name: scrape2
    select: "div[data-fullimg]"
    attribute: id
    index: 5
    value_template: '{{ "https://wallpaper.dog/large/" ~ value ~ ".jpg" }}'

Is there any way of using a random index without messing with pyhton?

Sry I’m a begginer and a non english speaker… be patient with me xD

PS: Just in case… this is my script (Initial)

'1649893800180':
  alias: Nuevo script
  sequence:
  - service: media_player.play_media
    target:
      entity_id: media_player.cocina
    data:
      media_content_id: '{{ states(''sensor.scrape2'') }}'
      media_content_type: image/jpeg
  mode: single
2

You can create a range of the numbers and take a random one.

{{ "https://wallpaper.dog/large/" ~ range(1,10) | random ~ ".jpg" }}
1 Like
3

Yes, but in that case many of them will be invalid or not in the same album. Can i template the index of the sensor? I think I’ve tried that…

4

No, I can’t use templates on the index attribute :cry:

Invalid config for [sensor.scrape]: expected int for dictionary value @ data['index']. Got '{{ range(1, 10) | random }}'. (See ?, line ?).
5

I didn’t know it was the index attribute you where talking about.
You had a template with “value” printed in the middle, that looked like what you wanted help with.

Given that the index does not allow for templates then I don’t think that is possible in HA.
You could try and do it in Node red, it doesn’t have the same limitations.

1 Like
6

I do not use nodered and considerating the learning curve maybe I 'll give a try with Python instead. If anyone thinks a workaround please let me know.

Thanks for ur help anyways

PS: Sorry for my bad english

7

In case you want to give it a go then here is a working example:

This sequence will give you a list of all wallpapers:

image
image1559×765 50.7 KB

And in Developer tools it looks like: (I forgot to give it a name first)

image
image1786×638 88.7 KB

And from that sensor you should be able to take {{sensor.state}} ~ {{ sensor.attributes.images |random}}

[{"id":"1236609655bb0e7e","type":"inject","z":"90cf9b8a.ce14c8","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":780,"y":580,"wires":[["8ad61386349650bf"]]},{"id":"8ad61386349650bf","type":"http request","z":"90cf9b8a.ce14c8","name":"","method":"GET","ret":"txt","paytoqs":"ignore","url":"https://wallpaper.dog/coolest-gaming-wallpapers","tls":"","persist":false,"proxy":"","authType":"","senderr":false,"x":950,"y":580,"wires":[["3b9b786a069cdebf"]]},{"id":"3b9b786a069cdebf","type":"html","z":"90cf9b8a.ce14c8","name":"","property":"payload","outproperty":"payload","tag":"div[data-fullimg]","ret":"html","as":"single","x":1160,"y":580,"wires":[["f5dd43d90bd772c1"]]},{"id":"e71353dd48490af4","type":"debug","z":"90cf9b8a.ce14c8","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":1530,"y":580,"wires":[]},{"id":"f5dd43d90bd772c1","type":"function","z":"90cf9b8a.ce14c8","name":"","func":"var arr = new Array(msg.payload.length);\nvar i = 0;\n\nconst regex = /(\\/large\\/\\d+\\.jpg)/;\nvar match = new Array(2);\n\n\nmsg.payload.forEach(function (value,index) {\n    \n    match = value.match(regex);\n    arr[i] = [...new Set(match)].toString(); //match[0]\n    i++;    \n});\nmsg.payload = arr.filter(n => n)\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1380,"y":600,"wires":[["e71353dd48490af4","f286bc4b6f06e871"]]},{"id":"f286bc4b6f06e871","type":"ha-entity","z":"90cf9b8a.ce14c8","name":"wallpapers","server":"4bbca37b.1700ec","version":1,"debugenabled":false,"outputs":1,"entityType":"sensor","config":[{"property":"name","value":""},{"property":"device_class","value":""},{"property":"icon","value":""},{"property":"unit_of_measurement","value":""}],"state":"https://wallpaper.dog/","stateType":"str","attributes":[{"property":"images","value":"payload","valueType":"msg"}],"resend":true,"outputLocation":"payload","outputLocationType":"none","inputOverride":"allow","outputOnStateChange":false,"outputPayload":"$entity().state ? \"on\": \"off\"","outputPayloadType":"jsonata","x":1530,"y":500,"wires":[[]]},{"id":"4bbca37b.1700ec","type":"server","name":"Home Assistant","version":1,"legacy":false,"addon":true,"rejectUnauthorizedCerts":true,"ha_boolean":"y|yes|true|on|home|open","connectionDelay":true,"cacheJson":true}]

You can change the setting of the inject node to repeat at some interval to update the list (if the images change on the webpage).

8

It look nice!

But I’ve solved it using a 3rd party component based on scrape (multiscrape)

multiscrape:
  resource: https://wallpaper.dog/coolest-gaming-wallpapers
  scan_interval: 30
  sensor:
    - unique_id: wp_url
      name: Wallpaper URL
      select_list: "div[data-fullimg]"
      attribute: "id"
      value_template: '{{ "https://wallpaper.dog/large/" ~ value.split(",") | random ~ ".jpg" }}'

I really really thank u for the time u put into this and at some point I’ll give nodeRed a try

1 Like
9

A possible solution could be to use the multiscrape integration, which has a select_list option that will return a comma-separated string of all matching elements. Inside the value template you could then split that string into separate items and pick a random one ({{ value.split(',') | random }}).

@Aldopez beat me to it :wink:

1 Like
10

Almost the same time xD. Thanks anyway