Module: E3DCMqtt::ConfigLoader

Defined in:
lib/e3dc_mqtt/config.rb

Constant Summary collapse

DURATION_UNITS = 
{
  "ns" => 1e-9, "us" => 1e-6, "µs" => 1e-6, "ms" => 1e-3,
  "s" => 1.0, "m" => 60.0, "h" => 3600.0
}.freeze

Class Method Summary collapse

Class Method Details

.build(raw) ⇒ Object 



49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
 
# File 'lib/e3dc_mqtt/config.rb', line 49

def build(raw)
  e3dc_raw = raw["e3dc"] || {}
  mqtt_raw = raw["mqtt"] || {}

  e3dc = E3DCConfig.new(
    host: e3dc_raw["host"],
    port: e3dc_raw["port"] || 5033,
    username: e3dc_raw["username"],
    password: e3dc_raw["password"],
    key: e3dc_raw["key"],
    interval: parse_duration(e3dc_raw["interval"] || "5s"),
    statistic_update_interval: parse_duration(e3dc_raw["statistic_update_interval"] || "5m")
  )

  mqtt = MQTTConfig.new(
    url: mqtt_raw["url"],
    root: mqtt_raw["root"],
    client_id: mqtt_raw["client_id"] || "e3dc-mqtt-ruby",
    username: mqtt_raw["username"] || "",
    password: mqtt_raw["password"] || "",
    tls_verify: mqtt_raw.fetch("tls_verify", true)
  )

  cfg = Config.new(
    log_level: raw["log_level"] || "INFO",
    e3dc: e3dc,
    mqtt: mqtt
  )

  validate!(cfg)
  cfg
end

.load(path) ⇒ Object 



40
41
42
43
44
45
46
47
 
# File 'lib/e3dc_mqtt/config.rb', line 40

def load(path)
  raw = TomlRB.load_file(path)
  build(raw)
rescue Errno::ENOENT
  raise ConfigError, "cannot read config file: #{path}"
rescue TomlRB::ParseError => e
  raise ConfigError, "cannot parse config file: #{e.message}"
end

.parse_duration(str) ⇒ Object

Raises:



25
26
27
28
29
30
31
32
33
34
35
36
37
38
 
# File 'lib/e3dc_mqtt/config.rb', line 25

def parse_duration(str)
  raise ConfigError, "duration must be a string, got #{str.inspect}" unless str.is_a?(String)

  total = 0.0
  rest = str.dup
  until rest.empty?
    md = rest.match(/\A(\d+(?:\.\d+)?)(ns|us|µs|ms|s|m|h)/)
    raise ConfigError, "invalid duration: #{str.inspect}" unless md

    total += md[1].to_f * DURATION_UNITS.fetch(md[2])
    rest = rest[md[0].length..]
  end
  total
end

.validate!(cfg) ⇒ Object

Raises:



82
83
84
85
86
87
88
89
90
91
 
# File 'lib/e3dc_mqtt/config.rb', line 82

def validate!(cfg)
  raise ConfigError, "e3dc.host is required" if cfg.e3dc.host.nil? || cfg.e3dc.host.empty?
  raise ConfigError, "e3dc.username is required" if cfg.e3dc.username.nil? || cfg.e3dc.username.empty?
  raise ConfigError, "e3dc.password is required" if cfg.e3dc.password.nil? || cfg.e3dc.password.empty?
  raise ConfigError, "e3dc.key is required" if cfg.e3dc.key.nil? || cfg.e3dc.key.empty?
  raise ConfigError, "e3dc.interval must be at least 5s" if cfg.e3dc.interval < 5.0
  raise ConfigError, "e3dc.statistic_update_interval must be at least 5s" if cfg.e3dc.statistic_update_interval < 5.0
  raise ConfigError, "mqtt.url is required" if cfg.mqtt.url.nil? || cfg.mqtt.url.empty?
  raise ConfigError, "mqtt.root is required" if cfg.mqtt.root.nil? || cfg.mqtt.root.empty?
end