Class: LaunchDarkly::FeatureFlagsState

Inherits:
Object
  • Object
show all
Defined in:
lib/ldclient-rb/flags_state.rb

Overview

A snapshot of the state of all feature flags with regard to a specific user, generated by calling the LDClient#all_flags_state. Serializing this object to JSON using ‘JSON.generate` (or the `to_json` method) will produce the appropriate data structure for bootstrapping the LaunchDarkly JavaScript client.

Instance Method Summary collapse

Constructor Details

#initialize(valid) ⇒ FeatureFlagsState

Returns a new instance of FeatureFlagsState.



11
12
13
14
15
 
# File 'lib/ldclient-rb/flags_state.rb', line 11

def initialize(valid)
  @flag_values = {}
  @flag_metadata = {}
  @valid = valid
end

Instance Method Details

#add_flag(flag, value, variation, reason = nil, details_only_if_tracked = false) ⇒ Object

Used internally to build the state map.



19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
 
# File 'lib/ldclient-rb/flags_state.rb', line 19

def add_flag(flag, value, variation, reason = nil, details_only_if_tracked = false)
  key = flag[:key]
  @flag_values[key] = value
  meta = {}
  with_details = !details_only_if_tracked || flag[:trackEvents]
  if !with_details && flag[:debugEventsUntilDate]
    with_details = flag[:debugEventsUntilDate] > Impl::Util::current_time_millis
  end
  if with_details
    meta[:version] = flag[:version]
    meta[:reason] = reason if !reason.nil?
  end
  meta[:variation] = variation if !variation.nil?
  meta[:trackEvents] = true if flag[:trackEvents]
  meta[:debugEventsUntilDate] = flag[:debugEventsUntilDate] if flag[:debugEventsUntilDate]
  @flag_metadata[key] = meta
end

#as_json ⇒ Object

Returns a hash that can be used as a JSON representation of the entire state map, in the format used by the LaunchDarkly JavaScript SDK. Use this method if you are passing data to the front end in order to “bootstrap” the JavaScript client.

Do not rely on the exact shape of this data, as it may change in future to support the needs of the JavaScript client.



64
65
66
67
68
69
 
# File 'lib/ldclient-rb/flags_state.rb', line 64

def as_json(*) # parameter is unused, but may be passed if we're using the json gem
  ret = @flag_values.clone
  ret['$flagsState'] = @flag_metadata
  ret['$valid'] = @valid
  ret
end

#flag_value(key) ⇒ Object

Returns the value of an individual feature flag at the time the state was recorded. Returns nil if the flag returned the default value, or if there was no such flag.



45
46
47
 
# File 'lib/ldclient-rb/flags_state.rb', line 45

def flag_value(key)
  @flag_values[key]
end

#to_json(*a) ⇒ Object

Same as as_json, but converts the JSON structure into a string.



72
73
74
 
# File 'lib/ldclient-rb/flags_state.rb', line 72

def to_json(*a)
  as_json.to_json(a)
end

#valid? ⇒ Boolean

Returns true if this object contains a valid snapshot of feature flag state, or false if the state could not be computed (for instance, because the client was offline or there was no user).

Returns:

  • (Boolean) 


39
40
41
 
# File 'lib/ldclient-rb/flags_state.rb', line 39

def valid?
  @valid
end

#values_map ⇒ Object

Returns a map of flag keys to flag values. If a flag would have evaluated to the default value, its value will be nil.

Do not use this method if you are passing data to the front end to “bootstrap” the JavaScript client. Instead, use as_json.



54
55
56
 
# File 'lib/ldclient-rb/flags_state.rb', line 54

def values_map
  @flag_values
end