Class: Factis::Memory

Inherits:
Object
  • Object
show all
Defined in:
lib/factis/memory.rb

Overview

This is the workhorse of Factis. It’s what does the actual tracking of facts.

Class Method Summary collapse

Class Method Details

.all_facts ⇒ Hash

Get the entire facts hash



24
25
26
27
 
# File 'lib/factis/memory.rb', line 24

def self.all_facts
  init_memory!
  @facts
end

.forget(fact) ⇒ Object

Removes the given fact (key) from internal storage

Raises:

  • (RuntimeError) —

    if the key is not in the fact hash



70
71
72
73
74
 
# File 'lib/factis/memory.rb', line 70

def self.forget(fact)
  init_memory!
  detect_unknown_fact(fact, 'Trying to forget an unknown fact')
  @facts.delete(fact)
end

.known_fact?(fact) ⇒ Boolean

Determines if the given fact key is already known



57
58
59
60
 
# File 'lib/factis/memory.rb', line 57

def self.known_fact?(fact)
  init_memory!
  @facts.keys.include?(fact)
end

.memorize(fact, content, options = {:overwrite => false}) ⇒ Object

Stores content as fact, optionally overwriting said content

Raises:

  • (RuntimeError) —

    if the fact key is already known and :overwrite is not active.



41
42
43
44
45
46
47
48
49
 
# File 'lib/factis/memory.rb', line 41

def self.memorize(fact, content, options = {:overwrite => false})
  init_memory!
  if known_fact?(fact)
    unless options[:overwrite] == true
      raise %{Cannot memorize a fact more than once: '#{fact}'}
    end
  end
  @facts[fact] = content
end

.recall(fact) ⇒ Object

Get fact content by key

Raises:

  • (RuntimeError) —

    if the key is not in the fact hash



84
85
86
87
88
 
# File 'lib/factis/memory.rb', line 84

def self.recall(fact)
  init_memory!
  detect_unknown_fact(fact, 'Trying to recall an unknown fact')
  @facts[fact]
end

.reset! ⇒ Object

Clear the entire facts hash



92
93
94
95
 
# File 'lib/factis/memory.rb', line 92

def self.reset!
  init_memory!
  @facts.clear
end