Class: Autosuggest::Generator
- Inherits:
-
Object
- Object
- Autosuggest::Generator
- Defined in:
- lib/autosuggest/generator.rb
Instance Method Summary collapse
- #add_concept(name, values) ⇒ Object
- #block_words(words) ⇒ Object
-
#initialize(top_queries, language: "english") ⇒ Generator
constructor
A new instance of Generator.
- #not_duplicates(pairs) ⇒ Object
- #parse_words(phrases, options = {}) ⇒ Object
- #prefer(queries) ⇒ Object
- #suggestions(filter: true) ⇒ Object
- #table ⇒ Object (also: #pretty_suggestions)
Constructor Details
#initialize(top_queries, language: "english") ⇒ Generator
Returns a new instance of Generator.
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# File 'lib/autosuggest/generator.rb', line 3 def initialize(top_queries, language: "english") @top_queries = top_queries @concepts = {} @words = Set.new @non_duplicates = Set.new @blocked_words = {} @preferred_queries = {} @profane_words = {} @concept_tree = {} begin @stemmer = Lingua::Stemmer.new(language: language) rescue Lingua::StemmerError raise ArgumentError, "Language not available" end # TODO take language into account for profanity add_nodes(@profane_words, Obscenity::Base.blacklist) end |
Instance Method Details
#add_concept(name, values) ⇒ Object
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# File 'lib/autosuggest/generator.rb', line 21 def add_concept(name, values) values = values.compact.uniq add_nodes(@concept_tree, values) @concepts[name] = Set.new(values.map(&:downcase)) end |
#block_words(words) ⇒ Object
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# File 'lib/autosuggest/generator.rb', line 51 def block_words(words) add_nodes(@blocked_words, words) words end |
#not_duplicates(pairs) ⇒ Object
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# File 'lib/autosuggest/generator.rb', line 45 def not_duplicates(pairs) pairs.each do |pair| @non_duplicates << pair.map(&:downcase).sort end end |
#parse_words(phrases, options = {}) ⇒ Object
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# File 'lib/autosuggest/generator.rb', line 27 def parse_words(phrases, = {}) min = [:min] || 1 word_counts = Hash.new(0) phrases.each do |phrase| words = tokenize(phrase) words.each do |word| word_counts[word] += 1 end end word_counts.select { |_, c| c >= min }.each do |word, _| @words << word end word_counts end |
#prefer(queries) ⇒ Object
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# File 'lib/autosuggest/generator.rb', line 56 def prefer(queries) queries.each do |query| @preferred_queries[normalize_query(query)] ||= query end end |
#suggestions(filter: true) ⇒ Object
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# File 'lib/autosuggest/generator.rb', line 62 def suggestions(filter: true) stemmed_queries = {} added_queries = Set.new results = @top_queries.sort_by { |_query, count| -count }.map do |query, count| query = query.to_s # TODO do not ignore silently next if query.length < 2 stemmed_query = normalize_query(query) # get preferred term preferred_query = @preferred_queries[stemmed_query] if preferred_query && preferred_query != query original_query, query = query, preferred_query end # exclude duplicates duplicate = stemmed_queries[stemmed_query] stemmed_queries[stemmed_query] ||= query # also detect possibly misspelled duplicates # TODO use top query as duplicate if !duplicate && query.length > 4 edits(query).each do |edited_query| if added_queries.include?(edited_query) duplicate = edited_query break end end end if duplicate && @non_duplicates.include?([duplicate, query].sort) duplicate = nil end added_queries << query unless duplicate # find concepts concepts = [] @concepts.each do |name, values| concepts << name if values.include?(query) end tokens = tokenize(query) # exclude misspellings that are not brands misspelling = @words.any? && misspellings?(tokens) profane = blocked?(tokens, @profane_words) blocked = blocked?(tokens, @blocked_words) notes = [] notes << "duplicate of #{duplicate}" if duplicate notes.concat(concepts) notes << "misspelling" if misspelling notes << "profane" if profane notes << "blocked" if blocked notes << "originally #{original_query}" if original_query { query: query, original_query: original_query, score: count, duplicate: duplicate, concepts: concepts, misspelling: misspelling, profane: profane, blocked: blocked, notes: notes } end results.compact! if filter results.filter_map do |s| unless s[:duplicate] || s[:misspelling] || s[:profane] || s[:blocked] s.slice(:query, :score) end end else results end end |
#table ⇒ Object Also known as: pretty_suggestions
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# File 'lib/autosuggest/generator.rb', line 146 def table str = "%-30s %5s %s\n" % %w(Query Score Notes) suggestions(filter: false).each do |suggestion| str << "%-30s %5d %s\n" % [suggestion[:query], suggestion[:score], suggestion[:notes].join(", ")] end str end |