Class: UKPlanningScraper::Authority

Inherits:
Object
  • Object
show all
Defined in:
lib/uk_planning_scraper/idox.rb,
lib/uk_planning_scraper/authority.rb,
lib/uk_planning_scraper/northgate.rb,
lib/uk_planning_scraper/authority_scrape_params.rb

Constant Summary collapse

@@authorities = 
[]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, url) ⇒ Authority

Returns a new instance of Authority.



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# File 'lib/uk_planning_scraper/authority.rb', line 9

def initialize(name, url)
  @name = name.strip
  @url = url.strip
  @tags = [] # Strings in arbitrary order
  @applications = [] # Application objects
  @scrape_params = {}
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_name, *args) ⇒ Object (private)

Handle the simple params with this



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# File 'lib/uk_planning_scraper/authority_scrape_params.rb', line 90

def method_missing(method_name, *args)
  sc_params = {
    validated_from: Date,
    validated_to: Date,
    received_from: Date,
    received_to: Date,
    decided_from: Date,
    decided_to: Date,
    keywords: String
  }
  
  value = args[0]
  
  if sc_params[method_name]
    check_class(value, sc_params[method_name], method_name.to_s)
    value.strip! if value.class == String
    
    if value.class == Date && value > Date.today
      raise ArgumentError.new("#{method_name} can't be a date in the " + \
        "future (#{value.to_s})")
    end
    
    @scrape_params[method_name] = value
    self
  else
    raise NoMethodError.new(method_name.to_s)
  end
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/uk_planning_scraper/authority.rb', line 5

def name
  @name
end

#url ⇒ Object (readonly)

Returns the value of attribute url.



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# File 'lib/uk_planning_scraper/authority.rb', line 5

def url
  @url
end

Class Method Details

.all ⇒ Object 



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# File 'lib/uk_planning_scraper/authority.rb', line 84

def self.all
  @@authorities
end

.load ⇒ Object 



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# File 'lib/uk_planning_scraper/authority.rb', line 122

def self.load
  # Don't run this method more than once
  return unless @@authorities.empty?
  CSV.foreach(File.join(File.dirname(__dir__), 'uk_planning_scraper', \
      'authorities.csv'), :headers => true) do |line|
    auth = Authority.new(line['authority_name'], line['url'])
    
    if line['tags']
      auth.add_tags(line['tags'].split(/\s+/))
    end
    
    auth.add_tag(auth.system)
    @@authorities << auth
  end
end

.named(name) ⇒ Object

Raises:



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# File 'lib/uk_planning_scraper/authority.rb', line 95

def self.named(name)
  authority = @@authorities.find { |a| name == a.name }
  raise AuthorityNotFound if authority.nil?
  authority 
end

.not_tagged(tag) ⇒ Object

Not tagged x



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# File 'lib/uk_planning_scraper/authority.rb', line 109

def self.not_tagged(tag)
  found = []
  @@authorities.each { |a| found << a unless a.tagged?(tag) }
  found
end

.tagged(tag) ⇒ Object

Tagged x



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# File 'lib/uk_planning_scraper/authority.rb', line 102

def self.tagged(tag)
  found = []
  @@authorities.each { |a| found << a if a.tagged?(tag) }
  found
end

.tags ⇒ Object

List all the tags in use



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# File 'lib/uk_planning_scraper/authority.rb', line 89

def self.tags
  tags = []
  @@authorities.each { |a| tags << a.tags }
  tags.flatten.uniq.sort
end

.untagged ⇒ Object

Authorities with no tags



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# File 'lib/uk_planning_scraper/authority.rb', line 116

def self.untagged
  found = []
  @@authorities.each { |a| found << a if a.tags.empty? }
  found
end

Instance Method Details

#add_tag(tag) ⇒ Object

Add a single tag to existing tags



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# File 'lib/uk_planning_scraper/authority.rb', line 61

def add_tag(tag)
  clean_tag = tag.strip.downcase.gsub(' ', '')
  @tags << clean_tag unless tagged?(clean_tag) # prevent duplicates
end

#add_tags(tags) ⇒ Object

Add multiple tags to existing tags



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# File 'lib/uk_planning_scraper/authority.rb', line 56

def add_tags(tags)
  tags.each { |t| add_tag(t) }
end

#applicant_name(s) ⇒ Object 



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# File 'lib/uk_planning_scraper/authority_scrape_params.rb', line 54

def applicant_name(s)
  unless system == 'idox'
    raise NoMethodError.new("applicant_name is only implemented for Idox. \
      This authority (#{@name}) is #{system.capitalize}.")
  end
  
  check_class(s, String)
  @scrape_params[:applicant_name] = s.strip
  self
end

#application_type(s) ⇒ Object 



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# File 'lib/uk_planning_scraper/authority_scrape_params.rb', line 65

def application_type(s)
  unless system == 'idox'
    raise NoMethodError.new("application_type is only implemented for \
      Idox. This authority (#{@name}) is #{system.capitalize}.")
  end
  
  check_class(s, String)
  @scrape_params[:application_type] = s.strip
  self
end

#decided_days(n) ⇒ Object 



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# File 'lib/uk_planning_scraper/authority_scrape_params.rb', line 40

def decided_days(n)
  # decided within the last n days
  # Assumes that every scraper/system can do a date range search
  check_class(n, Fixnum)

  unless n > 0
    raise ArgumentError.new("decided_days must be greater than 0")
  end
  
  decided_from(Date.today - (n - 1))
  decided_to(Date.today)
  self
end

#development_type(s) ⇒ Object 



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# File 'lib/uk_planning_scraper/authority_scrape_params.rb', line 76

def development_type(s)
  unless system == 'idox'
    raise NoMethodError.new("development_type is only implemented for \
      Idox. This authority (#{@name}) is #{system.capitalize}.")
  end
  
  check_class(s, String)
  @scrape_params[:development_type] = s.strip
  self
end

#received_days(n) ⇒ Object 



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# File 'lib/uk_planning_scraper/authority_scrape_params.rb', line 26

def received_days(n)
  # received within the last n days
  # Assumes that every scraper/system can do a date range search
  check_class(n, Fixnum)

  unless n > 0
    raise ArgumentError.new("received_days must be greater than 0")
  end
  
  received_from(Date.today - (n - 1))
  received_to(Date.today)
  self
end

#scrape(options = {}) ⇒ Object 



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# File 'lib/uk_planning_scraper/authority.rb', line 17

def scrape(options = {})
  default_options = {
    delay: 10,
  }
  # The user-supplied options override the defaults
  options = default_options.merge(options)

  # Select which scraper to use
  case system
  when 'idox'
    @applications = scrape_idox(@scrape_params, options)
  when 'northgate'
    @applications = scrape_northgate(@scrape_params, options)
  else
    raise SystemNotSupported.new("Planning system not supported for \
      #{@name} at URL: #{@url}")
  end
  
  # Post processing
  @applications.each do |app|
    app.authority_name = @name
  end

  # Output as an array of hashes
  output = []
  # FIXME - silently ignores invalid apps. How should we handle them?
  @applications.each { |app| output << app.to_hash if app.valid? }
  
  # Reset so that old params don't get used for new scrapes
  clear_scrape_params
  
  output  # Single point of successful exit
end

#system ⇒ Object 



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# File 'lib/uk_planning_scraper/authority.rb', line 70

def system
  if @url.match(/search\.do\?action=advanced/i)
    'idox'
  elsif @url.match(/generalsearch\.aspx/i)
    'northgate'
  elsif @url.match(/ocellaweb/i)
    'ocellaweb'
  elsif @url.match(/\/apas\//)
    'agileplanning'
  else
    'unknownsystem'
  end
end

#tagged?(tag) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/uk_planning_scraper/authority.rb', line 66

def tagged?(tag)
  @tags.include?(tag)
end

#tags ⇒ Object 



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# File 'lib/uk_planning_scraper/authority.rb', line 51

def tags
  @tags.sort
end

#validated_days(n) ⇒ Object

Parameter methods for Authority#scrape Desgined to be method chained, eg:

applications = UKPlanningScraper::Authority.named(“Barnet”). \ development_type(“Q22”).keywords(“illuminat”). \ validated_days(30).scrape



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# File 'lib/uk_planning_scraper/authority_scrape_params.rb', line 12

def validated_days(n)
  # Validated within the last n days
  # Assumes that every scraper/system can do a date range search
  check_class(n, Fixnum)

  unless n > 0
    raise ArgumentError.new("validated_days must be greater than 0")
  end
  
  validated_from(Date.today - (n - 1))
  validated_to(Date.today)
  self
end