Class: SearchJsonData::DataArray

Inherits:
Object
  • Object
show all
Defined in:
lib/search_json_data/data_array.rb

Overview

Author:

  • Diego Piccinini Lagos

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file_path = File.join(File.dirname(__FILE__),'data.json')) ⇒ DataArray

read the Json file and dump to array

Parameters:

  • file_path (Pathname) (defaults to: File.join(File.dirname(__FILE__),'data.json')) —

    path to a json file



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# File 'lib/search_json_data/data_array.rb', line 8

def initialize(file_path = File.join(File.dirname(__FILE__),'data.json'))
    @data_array= JSON.parse File.read(file_path)
    @results = []
end

Instance Attribute Details

#data_array ⇒ Object (readonly)

Returns the value of attribute data_array.



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# File 'lib/search_json_data/data_array.rb', line 4

def data_array
  @data_array
end

#results ⇒ Object (readonly)

Returns the value of attribute results.



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# File 'lib/search_json_data/data_array.rb', line 4

def results
  @results
end

Instance Method Details

#clean_results ⇒ Object

to clean the result collection



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# File 'lib/search_json_data/data_array.rb', line 74

def clean_results
    @results = []
end

#search_by(words, field = nil, condition = nil, precision = false) ⇒ Array

search words in a collection

otherwise AND return only the results in both searches

Parameters:

  • words (String) —

    words to search, when are quoted must match exactly

  • field (String) (defaults to: nil) —

    the name of the field, is nil by default in this case search in all fields

  • condition (String, nil) (defaults to: nil) —

    the condition to search, by default nil to add results to the before search,

  • precision (Boolean, false) (defaults to: false) —

    false by default, true is case sensitive

Returns:

  • (Array) —

    collection of matching results



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# File 'lib/search_json_data/data_array.rb', line 21

def search_by(words, field = nil, condition = nil, precision = false)

    # to include negative searchs
    negative = words.scan(/-.*?$/).first
    # erase the negative argument
    words = words.sub(negative,'') if negative

    # when the search have exactly presition search quoted text
    phrases =words.split(/\"/)

    # exactly phrases are quoted
    exactly_phrases = []
    words.scan(/\".*?\"/).each {|exactly| exactly_phrases << exactly.tr('"','') }

    # non exactly prhases the difference of
    non_exactly_phrases =  phrases - exactly_phrases

    # array of all words to match
    words_to_match = non_exactly_phrases.join(' ').split(' ').uniq

    results = []

    self.data_array.each  do |data_hash|

        data_for_search = data_hash
        # if field is not nil the data_for_search has only the field
        data_for_search = data_hash.select { |k,v| k == field } if field

        # if match one or more words
        match = is_match words_to_match, data_for_search, nil, precision
        # if match one or more exactly phrases
        match = match & (is_match exactly_phrases, data_for_search, nil, precision)

        # when match is true add the data_hash to the results
        results << data_hash if match
    end

    if condition == "AND"
        # if has contition AND only considate the values in both collections
        @results = results.uniq & @results
    elsif condition == "-"
        # when condition is "-" rest to the previos matches the finded values
        @results = @results - results.uniq
    else
        # add all matching values in this search to @result instance collection
        @results = @results | results.uniq
    end
    # when the phrase has a negative value search for this value
    self.search_by(negative[1 .. -1],field,"-", precision) if negative and negative.length > 1
    @results
end