Class: Razor::CLI::Navigate

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/razor/cli/navigate.rb

Instance Method Summary collapse

Constructor Details

#initialize(parse, segments) ⇒ Navigate

Returns a new instance of Navigate.



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# File 'lib/razor/cli/navigate.rb', line 10

def initialize(parse, segments)
  @parse = parse
  @segments = segments||[]
  @doc = entrypoint
  @doc_url = parse.api_url
end

Instance Method Details

#collections ⇒ Object 



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# File 'lib/razor/cli/navigate.rb', line 25

def collections
  entrypoint["collections"]
end

#command(name) ⇒ Object 



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# File 'lib/razor/cli/navigate.rb', line 41

def command(name)
  @command ||= commands.find { |coll| coll["name"] == name }
end

#command? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/razor/cli/navigate.rb', line 45

def command?
  !! command(@segments.first)
end

#commands ⇒ Object 



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# File 'lib/razor/cli/navigate.rb', line 29

def commands
  entrypoint["commands"]
end

#entrypoint ⇒ Object 



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# File 'lib/razor/cli/navigate.rb', line 21

def entrypoint
  @entrypoint ||= json_get(@parse.api_url)
end

#extract_command ⇒ Object 



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# File 'lib/razor/cli/navigate.rb', line 95

def extract_command
  cmd = command(@segments.shift)
  @cmd_url = cmd['id']
  body = {}
  until @segments.empty?
    argument = @segments.shift
    if argument =~ /\A--([a-z-]+)(=(.+))?\Z/
      # `--arg=value` or `--arg value`
      arg, value = [$1, $3]
      value = @segments.shift if value.nil? && @segments[0] !~ /^--/
      if value =~ /\A(.+?)=(\S+)?\z/
        # `--arg name=value`
        unless body[arg].nil? or body[arg].is_a?(Hash)
          # Error: `--arg value --arg name=value`
          raise ArgumentError, "Cannot handle mixed types for argument #{arg}"
        end
        # Do not convert, assume the above is the conversion.
        body[arg] = (body[arg].nil? ? {} : body[arg]).merge($1 => $2)
      elsif body[arg].is_a?(Hash)
        # Error: `--arg name=value --arg value`
        raise ArgumentError, "Cannot handle mixed types for argument #{arg}"
      else
        value = convert_arg(cmd["name"], arg, value)
        if body[arg].nil?
          body[arg] = value
        else
          # Either/both `body[arg]` or/and `value` might be an array at this point.
          body[arg] = Array(body[arg]) + Array(value)
        end
      end
    else
      raise ArgumentError, "Unexpected argument #{argument}"
    end
  end

  begin
    body = MultiJson::load(File::read(body["json"])) if body["json"]
  rescue MultiJson::LoadError
    raise Razor::CLI::Error, "File #{body["json"]} is not valid JSON"
  rescue Errno::ENOENT
    raise Razor::CLI::Error, "File #{body["json"]} not found"
  rescue Errno::EACCES
    raise Razor::CLI::Error,
          "Permission to read file #{body["json"]} denied"
  end
  [cmd, body]
end

#get(url, headers = {}) ⇒ Object 



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# File 'lib/razor/cli/navigate.rb', line 188

def get(url, headers={})
  response = RestClient.get url.to_s, headers
  print "GET #{url.to_s}\n#{response.body}\n\n" if @parse.dump_response?
  response
end

#get_document ⇒ Object 



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# File 'lib/razor/cli/navigate.rb', line 51

def get_document
  if @segments.empty?
    entrypoint
  elsif query?
    @doc = collections
    while @segments.any?
      move_to @segments.shift
    end

    # Get the next level if it's a list of objects.
    if @doc.is_a?(Hash) and @doc['items'].is_a?(Array)
      @doc['items'] = @doc['items'].map do |item|
        item.is_a?(Hash) && item.has_key?('id') ? json_get(item['id']) : item
      end
    end
    @doc
  elsif command?
    # @todo lutter 2013-08-16: None of this has any tests, and error
    # handling is heinous at best
    cmd, body = extract_command
    # Ensure that we copy authentication data from our previous URL.
    url = cmd["id"]
    if @doc_url
      url          = URI.parse(url.to_s)
      url.userinfo = @doc_url.userinfo
    end

    if show_command_help?
      json_get(url)
    else
      if body.empty?
        raise Razor::CLI::Error,
              "No arguments for command (did you forget --json ?)"
      end
      result = json_post(url, body)
      # Get actual object from the id.
      result = result.merge(json_get(result['id'])) if result['id']
      result
    end
  else
    raise NavigationError.new(@doc_url, @segments, @doc)
  end
end

#json_get(url, headers = {}) ⇒ Object 



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# File 'lib/razor/cli/navigate.rb', line 194

def json_get(url, headers = {})
  response = get(url,headers.merge(:accept => :json))
  unless response.headers[:content_type] =~ /application\/json/
    raise "Received content type #{response.headers[:content_type]}"
  end
  MultiJson.load(response.body)
end

#json_post(url, body) ⇒ Object 



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# File 'lib/razor/cli/navigate.rb', line 202

def json_post(url, body)
  headers = {  :accept=>:json, "Content-Type" => :json }
  begin
    response = RestClient.post url.to_s, MultiJson::dump(body), headers
  ensure
    if @parse.dump_response?
      print "POST #{url.to_s}\n#{body}\n-->\n"
      puts (response ? response.body : "ERROR")
    end
  end
  MultiJson::load(response.body)
end

#last_url ⇒ Object 



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# File 'lib/razor/cli/navigate.rb', line 17

def last_url
  @doc_url
end

#move_to(key) ⇒ Object

Raises:



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# File 'lib/razor/cli/navigate.rb', line 143

def move_to(key)
  if @doc.is_a? Array
    obj = @doc.find {|x| x.is_a?(Hash) and x["name"] == key }
  elsif @doc.is_a?(Hash) && @doc['items'].is_a?(Array)
    obj = @doc['items'].find {|x| x.is_a?(Hash) and x["name"] == key }
  elsif @doc.is_a? Hash
    obj = @doc[key]
  end

  raise NavigationError.new(@doc_url, key, @doc) unless obj

  if obj.is_a?(Hash) && obj["id"]
    url = obj["id"]
    if @doc_url
      url          = URI.parse(url.to_s)
      url.userinfo = @doc_url.userinfo
    end

    @doc = json_get(url)
    @doc_url = url
  elsif obj.is_a?(Hash) && obj['spec']
    @doc = obj
  elsif obj.is_a?(Hash)
    # No spec string; use parent's and remember extra navigation.
    if @doc['+spec'].is_a?(Array)
      # Something's been added.
      @doc['+spec'] << key
    elsif @doc['+spec'].nil? || @doc['+spec'].is_a?(String)
      @doc['+spec'] = [@doc['spec'], key]
    end
    @doc = obj.merge({'+spec' => @doc['+spec']})
  elsif obj.is_a?(Array)
    # No spec string; use parent's and remember extra navigation.
    if @doc['+spec'].is_a?(Array)
      # Something's already been added.
      @doc['+spec'] << key
    elsif @doc['+spec'].nil? || @doc['+spec'].is_a?(String)
      @doc['+spec'] = [@doc['spec'], key]
    end
    @doc = {'+spec' => @doc['+spec'], 'items' => obj}
  else
    @doc = nil
  end
end

#query? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/razor/cli/navigate.rb', line 37

def query?
  @query ||= collections.any? { |coll| coll["name"] == @segments.first }
end

#server_version ⇒ Object 



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# File 'lib/razor/cli/navigate.rb', line 33

def server_version
  entrypoint.has_key?('version') and entrypoint['version']['server'] or 'Unknown'
end