Class: Concordancer

Inherits:
Object
  • Object
show all
Defined in:
lib/lumix/concordancer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(db_uri, options = {}) ⇒ Concordancer

Returns a new instance of Concordancer.



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# File 'lib/lumix/concordancer.rb', line 55

def initialize(db_uri, options = {})
  @progress_proc = options[:progress_proc]
  @db = connect(db_uri) do |db|
    db.tables.each{ |t| db.drop_table t } if options[:recreate]
  end
  @ids = db[:texts].map { |v| v[:id] }
  @tp = TextProcessing.new
end

Instance Attribute Details

#db ⇒ Object (readonly)

Returns the value of attribute db.



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# File 'lib/lumix/concordancer.rb', line 52

def db
  @db
end

#progress_proc ⇒ Object

Returns the value of attribute progress_proc.



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# File 'lib/lumix/concordancer.rb', line 53

def progress_proc
  @progress_proc
end

#tp ⇒ Object (readonly)

Returns the value of attribute tp.



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# File 'lib/lumix/concordancer.rb', line 52

def tp
  @tp
end

Instance Method Details

#all ⇒ Object 



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# File 'lib/lumix/concordancer.rb', line 101

def all
  db[:texts].select(:id).map{|v| v.values}
end

#fallback? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lumix/concordancer.rb', line 64

def fallback?
  @fallback
end

#find(filter) ⇒ Object 



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# File 'lib/lumix/concordancer.rb', line 126

def find(filter)
  texts = db[:texts]
  prog = Progress.new(:search, texts.count, filter)
  progress(prog)

  re = Filter.to_re(filter)

  index = 0
  texts.inject(0) do |result, t|
    t_id, text, tagged = t[:id], t[:text], t[:tagged]

    # matches to ranges
    results = []
    tagged.scan(re) do |hit|
      t_begin = $~.begin(0)
      t_end = $~.end(0)
      # TODO decouple database operations for performance
      results << find_range(t_id, t_begin, t_end)
    end

    result += results.inject(0) do |result, f|
      text_snippet = TextSnippet.new(File.basename(t[:filename]), text, f[:src_begin].to_i, f[:src_end].to_i)
      tagged_snippet = TextSnippet.new(File.basename(t[:tagged_filename]), tagged, f[:tagged_begin].to_i, f[:tagged_end].to_i)
      if block_given?
        yield text_snippet, tagged_snippet
      else
        puts text_snippet
        puts tagged_snippet
        puts
      end
      result += 1
    end
    progress prog, (index += 1)
    result
  end
end

#find_range(t_id, t_begin, t_end) ⇒ Object 



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# File 'lib/lumix/concordancer.rb', line 163

def find_range(t_id, t_begin, t_end)
  ds = db[:assoc].filter(:text_id => t_id).filter{tagged_end >= t_begin}.filter{tagged_begin < t_end}
  ds.select{[{min(:src_begin) => :src_begin},{ max(:src_end) => :src_end}, {min(:tagged_begin) => :tagged_begin}, {max(:tagged_end) => :tagged_end}]}.first
end

#get_id(file) ⇒ Object 



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# File 'lib/lumix/concordancer.rb', line 68

def get_id(file)
  text = File.read(file)
  saved = db[:texts][:digest => text.digest]
  saved ? saved[:id] : nil
end

#link(*ids) ⇒ Object 



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# File 'lib/lumix/concordancer.rb', line 111

def link(*ids)
  ids = all if ids.empty?
  ids.flatten!
  prog = Progress.new(:link, ids.size)
  progress(prog)

  ids.each_with_index do |id, index|
    ds = db[:assoc].filter(:text_id => id)
    yield ds if block_given?

    link_text(id) if ds.empty?
    progress(prog, index + 1)
  end
end

#link!(*ids) ⇒ Object 



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# File 'lib/lumix/concordancer.rb', line 105

def link!(*ids)
  link(*ids) do |ds|
    ds.delete
  end
end

#read(*files) ⇒ Object 



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# File 'lib/lumix/concordancer.rb', line 74

def read(*files)
  files = tp.to_filelist(files)
  prog = Progress.new(:read, files.size)
  puts "Reading #{files.size} files"
  files.each_with_index do |file, index|
    tp.read_file(file)
    progress(prog, index + 1)
  end
  link
end

#read_file(file) ⇒ Object 



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# File 'lib/lumix/concordancer.rb', line 85

def read_file(file)
  # read the raw text
  text = File.read(file)
  saved = db[:texts][:digest => text.digest]

  unless saved
    # retrieve the tagged version
    tagged_file = create_tagged_filename(file)
    process_file(file, tagged_file) unless File.exists?(tagged_file)

    tagged = retag(File.read(tagged_file))
    id = db[:texts].insert(:digest => text.digest, :text => text, :tagged => tagged, :filename => file, :tagged_filename => tagged_file)
    @ids << id
  end
end