Merge pull request code-dot-org#24489 from code-dot-org/block-deleter

Block deleter script

Author: balderdash

bin/oneoff/block_deletion.rb

@@ -0,0 +1,79 @@
+#!/usr/bin/env ruby
+
+# This script is used to find and delete level-specific custom blocks that also
+# exist in the block pool.
+#
+# Usage: ./block_deletion.rb
+# Typically you would want to run this script directly on levelbuilder. Be sure
+# to commit content first in case something goes wrong.
+#
+# It will run through all the blocks in the block pool, and compare them against
+# all level-specific blocks. The level-specific block will be removed if it's
+# exactly the same as the block pool block, or if the level it's in is not used
+# in any script, nor is it the 'New Sprite Lab Project' level. Otherwise, the
+# script will display a diff and prompt you to keep or delete the level-specific
+# block.
+
+require_relative '../../dashboard/config/environment'
+
+def diff(block1, block2)
+  block1.dup.
+    delete_if {|k, v| block2[k] == v}.
+    merge!(block2.dup.delete_if {|k, _| block1.key?(k)})
+end
+
+def get_name(block)
+  block['name'] || block['func']
+end
+
+def format_custom_blocks(blocks)
+  # You want a hack? I'll give you hack
+  File.write('/tmp/blocks-formatter.js',  "console.log(JSON.stringify(#{JSON.pretty_generate blocks}, null, 2))")
+  `node /tmp/blocks-formatter.js`
+end
+
+def remove_block(level, block_name)
+  blocks = JSON.parse(level.custom_blocks)
+  blocks.reject! {|block| block_name == get_name(block)}
+  level.custom_blocks = format_custom_blocks(blocks)
+  level.save!
+end
+
+Block.all.each do |shared_block|
+  config = JSON.parse(shared_block.config)
+  shared_name = get_name(config)
+  config.delete('color')
+  similar_blocks = [config]
+
+  GamelabJr.all.each do |level|
+    next unless level.custom_blocks
+    blocks = JSON.parse level.custom_blocks
+    blocks.each do |block|
+      block.delete('color')
+      name = block['name'] || block['func']
+      next unless name == shared_name
+      if level.script_levels.empty? && level.name != 'New Sprite Lab Project'
+        remove_block(level, name)
+        next
+      end
+      puts
+      puts "Found a gamelab_#{name} block in #{level.name}"
+      if similar_blocks.include? block
+        puts "It's the same, deleting..."
+        remove_block(level, name)
+        next
+      end
+      puts "It's a different block. These fields changed in the level block:"
+      puts JSON.pretty_generate(diff(block, config).sort.to_h)
+      puts "Versus these values in the shared block:"
+      puts JSON.pretty_generate(diff(config, block).sort.to_h)
+      $stdin.flush
+      puts "should I delete it anyway? Y/n"
+      next if gets.downcase.starts_with? 'n'
+      remove_block(level, name)
+      similar_blocks << block
+    end
+  rescue => e
+    puts "Failed on #{level.name}, #{e}"
+  end
+end