Class: Nytimes::Articles::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/nytimes_articles/base.rb

Direct Known Subclasses

Article, ResultSet

Constant Summary collapse

API_SERVER = 
'api.nytimes.com'
API_VERSION = 
'v1'
API_NAME = 
'article'
API_BASE = 
"/svc/search/#{API_VERSION}/#{API_NAME}"
@@api_key = 
nil
@@debug = 
false
@@decode_html_entities = 
true

Class Method Summary collapse

Class Method Details

.api_key ⇒ Object

Returns the current value of the API Key



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# File 'lib/nytimes_articles/base.rb', line 35

def self.api_key
	@@api_key
end

.api_key=(key) ⇒ Object

Set the API key used for operations. This needs to be called before any requests against the API. To obtain an API key, go to developer.nytimes.com/



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# File 'lib/nytimes_articles/base.rb', line 19

def self.api_key=(key)
	@@api_key = key
end

.boolean_field(value) ⇒ Object 



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# File 'lib/nytimes_articles/base.rb', line 62

def self.boolean_field(value)
	case value
	when nil
		false
	when TrueClass
		true
	when FalseClass
		false
	when 'Y'
		true
	when 'N'
		false
	else
		false
	end
end

.build_request_url(params) ⇒ Object

Builds a request URI to call the API server



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# File 'lib/nytimes_articles/base.rb', line 41

def self.build_request_url(params)
	URI::HTTP.build :host => API_SERVER,
	:path => API_BASE,
	:query => params.map {|k,v| "#{URI.escape(k)}=#{URI.escape(v.to_s)}"}.join('&')
end

.date_field(value) ⇒ Object 



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# File 'lib/nytimes_articles/base.rb', line 57

def self.date_field(value)
	return nil unless value =~ /^\d{8}$/
	Date.strptime(value, "%Y%m%d")
end

.debug=(flag) ⇒ Object 



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# File 'lib/nytimes_articles/base.rb', line 23

def self.debug=(flag)
	@@debug = flag
end

.decode_html_entities=(flag) ⇒ Object

Set whether or not to decode HTML entities when returning text fields.



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# File 'lib/nytimes_articles/base.rb', line 29

def self.decode_html_entities=(flag)
 @@decode_html_entities = flag
end

.integer_field(value) ⇒ Object 



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# File 'lib/nytimes_articles/base.rb', line 52

def self.integer_field(value)
	return nil if value.nil?
	value.to_i
end

.invoke(params = {}) ⇒ Object 



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# File 'lib/nytimes_articles/base.rb', line 79

def self.invoke(params={})
	begin
		if @@api_key.nil?
			raise AuthenticationError, "You must initialize the API key before you run any API queries"
		end

		full_params = params.merge 'api-key' => @@api_key
		uri = build_request_url(full_params)	
		
		puts "REQUEST: #{uri}" if @@debug
			
		reply = uri.read
		parsed_reply = JSON.parse reply

		if parsed_reply.nil?
			raise BadResponseError, "Empty reply returned from API"
		end

		#case parsed_reply['status']
		# FIXME
		#end

		parsed_reply
	rescue OpenURI::HTTPError => e
		# FIXME: Return message from body?
		case e.message
		when /^400/
			raise BadRequestError
		when /^403/
			raise AuthenticationError
		when /^404/
			return nil
		when /^500/
			raise ServerError
		else
			raise ConnectionError
		end

		raise "Error connecting to URL #{uri} #{e}"
	rescue JSON::ParserError => e
		raise BadResponseError, "Invalid JSON returned from API:\n#{reply}"
	end
end

.text_field(value) ⇒ Object 



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# File 'lib/nytimes_articles/base.rb', line 47

def self.text_field(value)
	return nil if value.nil?
	@@decode_html_entities ? HTMLEntities.new.decode(value) : value
end