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#!/usr/bin/env ruby
require 'date'
require 'rubygems'
require 'camping'
require 'reststop'
require 'vpim/vcard'
require 'yaml'
require 'composite_primary_keys'
require 'marc'

Markaby::Builder.set(:indent, 2)

DBCONF = YAML.load(File.open(File.join(File.dirname(__FILE__), "database.yml")))
Camping.goes :OpenBiblio

module OpenBiblio::Models
  class Actor < Base
    self.establish_connection(DBCONF[:openbiblio])
    self.table_name = "member"
    self.primary_key = "mbrid"
  end
  
  class BibRecord < Base
    self.establish_connection(DBCONF[:openbiblio])
    self.table_name = "biblio"
    self.primary_key = "bibid"
    has_many :bib_fields, :foreign_key => 'bibid'
  end
  
  class BibField < Base
    self.establish_connection(DBCONF[:openbiblio])
    self.table_name = "biblio_field"
    set_primary_keys :bibid, :fieldid
    belongs_to :bib_record, :foreign_key => 'bibid'
  end
    
end

module OpenBiblio::Controllers
  class Services < REST 'services'
    def get
      @data = {"actor"=>{"title"=>"patrons", "accept"=>["text/x-vcard", "text/directory;profile=vcard,text/directory"]}}
      render(:read, :JSON)
    end
  end
  
  class Actor < R '/actors/(\d*([-,]\d+)*)'
    def get(id, *etc)      
      translated_id = IdTranslator.translate(id)      
      @data = {"source"=>"OpenBiblio ILS", "time"=>DateTime.now.to_s} 
      if translated_id.is_a?(String) or translated_id.is_a?(Fixnum)
        actors = []
        actors << OpenBiblio::Models::Actor.find(id)
      elsif translated_id.is_a?(Array)
        actors = OpenBiblio::Models::Actor.find(id)
      else
        actors = OpenBiblio::Models::Actor.find(:all)
      end
      @data["request"] = "http:" + self.URL("/actors/#{id}").to_s     
      @data["data"] = []
      actors.each do | actor |
        vcard = Vpim::Vcard::Maker.make2 do | vc |
          vc.add_name do | name |
            name.family = actor.last_name
            name.given = actor.first_name
            
          end
          vc.add_addr do | addr |
            addr.street = actor.address.split("\n")[0]
            citystatepost = actor.address.split("\n")[1]
            addr.locality = citystatepost.split(",")[0].strip
            addr.region, addr.postalcode = citystatepost.split(",")[1].split(" ")
          end
          vc.add_tel(actor.work_phone) { | p | p.location = 'work'} if actor.work_phone and !actor.work_phone.empty?
          vc.add_tel(actor.home_phone) { | p | p.location = 'home'} if actor.home_phone and !actor.home_phone.empty?
          vc.add_email(actor.email)  
          vc.add_uid(actor.barcode_nmbr.to_s, "http://jangle.org/terms/#barcode")
          vc.add_uid(actor.mbrid.to_s, "http://jangle.org/terms/#URI")
        end
        actor_hash = {:id=>"/actors/#{actor.mbrid}", :title=>"#{actor.last_name}, #{actor.first_name}", :updated=>actor.last_change_dt.xmlschema,
          :created=>actor.create_dt.xmlschema, :content_type=>"text/x-card", :content=>vcard.to_s}
        @data["data"] << actor_hash   
      end
      render(:read, :JSON)
    end
  end
  
  class Resource < R '/resources/(\d*([-,]\d+)*)'
    def get(id, *etc)      
      translated_id = IdTranslator.translate(id)      
      @data = {"source"=>"OpenBiblio ILS", "time"=>DateTime.now.to_s} 
      if translated_id.is_a?(String) or translated_id.is_a?(Fixnum)
        records = []
        records << OpenBiblio::Models::BibRecord.find(id)
      elsif translated_id.is_a?(Array)
        records = OpenBiblio::Models::BibRecord.find(id)
      else
        cond = {:limit=>100}
        @data["links"] = {:first=>"/resources/"}
        @data["links"][:self] = @env["REQUEST_URI"]
        @data["links"][:last] = "/resources/?page=#{OpenBiblio::Models::BibRecord.count/100}"
        if @input.page
          cond[:offset] = (@input.page.to_i * 100) 
          page = nil
          page = "?page=#{(@input.page.to_i - 1)}" if @input.page.to_i > 2
          @data["links"][:previous] = "/resources/#{page}"
        end
        
        records = OpenBiblio::Models::BibRecord.find(:all, cond)
      end
      @data["request"] = "http:" + self.URL("/resources/#{id}").to_s     
      @data["data"] = []
      records.each do | record |
        marc = MARC::Record.new
        title = MARC::DataField.new("245", "0", "0")
        title.append(MARC::Subfield.new("a", record.title))
        title.append(MARC::Subfield.new("b", record.title_remainder)) if record.title_remainder
        title.append(MARC::Subfield.new("c", record.responsibility_stmt)) if record.responsibility_stmt
        marc << title
        if record.author
          author = MARC::DataField.new("100", "0", "")
          author.append(MARC::Subfield.new("a", record.author))
          marc << author
        end
        [record.topic1, record.topic2, record.topic3, record.topic4, record.topic4].each do | subject |
          next unless subject
          subj = MARC::DataField.new("650", "", "4")
          subj.append(MARC::Subfield.new("a", subject))
          marc << subj
        end
        record.bib_fields.each do | fld |
          ind1 = fld.ind1_cd
          ind1 = "" if ind1 == "N"
          ind2 = fld.ind2_cd
          ind2 = "" if ind2 == "N"          
          unless field = marc[fld.tag] and !marc[fld.tag][fld.subfield_cd]
            field = MARC::DataField.new(fld.tag, ind1, ind2)
            marc << field
          end
          field.append(MARC::Subfield.new(fld.subfield_cd, fld.field_data))
        end
        marcxml = marc.to_xml
        record_hash = {:id=>"/resources/#{record.bibid}", :title=>record.title, :updated=>record.last_change_dt.xmlschema,
          :created=>record.create_dt.xmlschema, :content_type=>"application/marc21+xml", :content=>marcxml.to_s}
        @data["data"] << record_hash        
      end
      render(:read, :JSON)
    end
  end  
end

module OpenBiblio::Views
  module JSON
          
    def layout
      yield
    end    
    include OpenBiblio::Controllers
    def read

      @data.to_json
    end
  end
end

module OpenBiblio
  class IdTranslator
    def self.translate(str)
      #if the request is simple (integer, list or nil) return that
      return nil if str.empty?
      return str if str.match(/^\d+$/)
      return str.split(",") if str.match(/^(\d+,?)*$/)
      #if the request includes a range (x-y), translate that into an array
      ids = []
      str.split(",").each do | id |
        if id.match(/^\d+$/)
          ids << id          
        else
          start_rng, end_rng = id.split("-")
          (start_rng..end_rng).each { | i | ids << i }          
        end
      end
      return ids
    end
  end
end
module Vpim
  class  Vcard
    class Maker
      def add_uid(value, type=nil)
        uid = Vpim::DirectoryInfo::Field.create( 'UID', value.to_str )
        uid["TYPE"] = type if type
        @card << uid        
      end
    end
  end
end