Class: Trailblazer::Developer::Trace::Snapshot::Versions

Inherits:
Object
  • Object
show all
Defined in:
lib/trailblazer/developer/trace/snapshot/versions.rb

Overview

A table of all ctx variables, their hashes and serialized values.

{:current_user=>
  {3298051090906520533=>"#<TraceTest::User:0x000055b2e3424460 @id=1>",
   3764938782671692590=>"#<TraceTest::User:0x000055b2e33e45b8 @id=2>"},
 :params=>
  {2911818769466875657=>"{:name=>\"Q & I\"}",
   2238394858183550663=>"{:name=>\"Q & I\", :song=>{...}}"},
 :seq=>
  {-105020188158523405=>"[]",
   -2281497291400788995=>"[:authenticate]",
   150926802063554866=>"[:authenticate, :authorize]",
   3339595138798116233=>"[:authenticate, :authorize, :model]",
   -3395325862879242711=>
    "[:authenticate, :authorize, :model, :screw_params!]"},
 :model=>{348183403054247453=>"Object"}}

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Versions

Returns a new instance of Versions.



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# File 'lib/trailblazer/developer/trace/snapshot/versions.rb', line 59

def initialize
  @variables = {}
end

Instance Method Details

#add_changes!(new_versions) ⇒ Object 



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# File 'lib/trailblazer/developer/trace/snapshot/versions.rb', line 86

def add_changes!(new_versions)
  new_versions.each do |args|
    add_variable_version!(*args)
  end
end

#add_variable_version!(name, hash, value) ⇒ Object 



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# File 'lib/trailblazer/developer/trace/snapshot/versions.rb', line 93

def add_variable_version!(name, hash, value)
  @variables[name] ||= {}

  @variables[name][hash] = value # i hate mutations.
end

#changeset_for(ctx, value_snapshooter:) ⇒ Object

DISCUSS: problem with changeset is, we have to go through variables twice.



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# File 'lib/trailblazer/developer/trace/snapshot/versions.rb', line 64

def changeset_for(ctx, value_snapshooter:)
  new_versions = []

  changeset_for_snapshot = ctx.collect do |name, value|
    # DISCUSS: do we have to call that explicitly or does Hash#[] do that for us, anyway?
    value_hash = value.hash # DISCUSS: does this really always change when a deeply nested object changes?

    if (variable_versions = @variables[name]) && variable_versions.key?(value_hash) # TODO: test {variable: nil} value
      [name, value_hash, nil] # nil means it's an existing reference.
    else
      value_snapshot = value_snapshooter.(name, value, ctx: ctx)

      version = [name, value_hash, value_snapshot]

      new_versions << version
      version
    end
  end

  return changeset_for_snapshot, new_versions
end

#to_h ⇒ Object 



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# File 'lib/trailblazer/developer/trace/snapshot/versions.rb', line 99

def to_h
  @variables
end