Tasked with creating 1000+ image from 1000+ simple models. I am new to RUBY script, want to automate the task

Developers Ruby API
8

Quick and dirty finger exercise…
Tested only once at SU 2021 (Windows). Use at your own risk! No warranties!

Click on a menu in Extensions >>“Write thumbnail png beside skps”.
In a popop window select any skp file in a desired directory (folder) and click Open.

The plugin will go through ALL skp files in that directory (independently which file selected) and write its thumbnail into png file, into that directory.

The file name will be the same just the extension will be png, e.g.: model.skp >> model.png, model1.skp >> model1.png etc… )

(In the ruby console, the name of the file being written will be printed )

You can install as extension (again: it is a “dirty” one):
Dezmo_tumbstopng_a.rbz (1011 Bytes)

_

module Dezmo
module TumbsToPngA
  extend self
  @@loaded = false unless defined?(@@loaded)
  
  def get_skps_directory( model )
    # get the starting directory based on a current file
    path = model.path
    if path.nil? || path.empty?
      start_dir = Dir.getwd
    else
      start_dir = File.dirname(path)
    end
    # give a chance to user to select other directory
    # containing .skp file(s)
    title = "Save thumbnails in a selected directory: Select any SKP File ..."
    user_path = UI.openpanel(title, start_dir, "SKP|*.skp|")
    return unless user_path
    directory_path = File.dirname(user_path)
    # UI::openpanel returns paths with backslashes, change it:
    directory_path.gsub!(/\\\\|\\/,"/")
  end

  def inform(text)
    UI.messagebox(text)
    p "Job done!"
  end

  def create_thumbnails_pngs( model = Sketchup.active_model )
    directory_path = get_skps_directory( model )
    return inform("There is no skp file!") if !directory_path || !File.exist?(directory_path)
    successful = 0
    unsuccessful = 0
    skp_filenames = []
    image_filenames = []
    Dir.entries(directory_path).each{|file_name|
      next unless File.extname(file_name).downcase == ".skp"
      skp_filenames<<File.join(directory_path, file_name)
      base_name = File.basename(file_name, ".*")
      image_filenames<<File.join(directory_path, base_name + ".png")
    }
    skp_filenames.size.times{|i|
      p "Writing: #{image_filenames[i]}"
      # The main task: Write the thumbs into file...
      status = Sketchup.save_thumbnail(skp_filenames[i], image_filenames[i])
      status ? successful += 1 : unsuccessful += 1
    }
    done = " #{successful.to_s} png image(s) created."
    error = "\n #{unsuccessful.to_s} error(s) occurred."
    inform(done + error)
  end
  
  unless @@loaded
    cmd1 = UI::Command.new("Write thumbnail png beside skps"){
      create_thumbnails_pngs()
    }
    menu = UI.menu("Plugins").add_item(cmd1)
    @@loaded = true
  end
  
end
end

References (some):

https://ruby-doc.org/core-2.7.1/Dir.html#method-c-getwd
https://ruby-doc.org/core-2.7.1/File.html#method-c-basename

https://ruby.sketchup.com/UI.html#openpanel-class_method
https://ruby.sketchup.com/Sketchup.html#save_thumbnail-class_method

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