Class: GoogleLocal

Inherits:
Object
  • Object
show all
Includes:
HTTParty
Defined in:
lib/google_local.rb

Overview

Class for searching with the google local search

Class Method Summary collapse

Class Method Details

.crawl(term, point, sspn) ⇒ Object

searches a term near point with sspn (span in degrees)



30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
 
# File 'lib/google_local.rb', line 30

def self.crawl(term, point, sspn)
  print " - crawl for '#{term}' at #{point.inspect} within #{sspn.inspect} ("
  count = 0
  4.times do |i|
    data = get("/uds/GlocalSearch", :query => { :q => term, :start => i * 8,
    :sll => point.join(","), :sspn => sspn.join(",") }).to_hash
    if data["responseStatus"] == 200
      data["responseData"]["results"].each do |row|
        yield(row)
        count += 1
      end
    else
      raise Exception.new("Error in Google request")
    end
    print "."
  end  
  print ") results: #{count}\n"
end

.crawl_region(term, point, span, n = 10, &block) ⇒ Object

searches a term near point with sspn (span in degrees) n times n



50
51
52
53
54
55
56
57
58
 
# File 'lib/google_local.rb', line 50

def self.crawl_region(term, point, span, n = 10, &block) # :yields: data
  half_span = span / 2
  n.times do |x|
    n.times do |y|
      point = [point[0] + x * half_span, point[1] + y * half_span]
      crawl(term, point, [half_span, half_span], &block)
    end
  end
end

.search(term, point, sspn) ⇒ Object

searches a term near point with sspn (span in degrees)



12
13
14
15
16
17
18
19
20
 
# File 'lib/google_local.rb', line 12

def self.search(term, point, sspn)
  resp = get("/uds/GlocalSearch", :query => { :q => term, 
  :sll => point.join(","), :sspn => sspn.join(",") })
  if resp["responseStatus"] == 200
    resp["responseData"]["results"]
  else
    raise Exception.new("Error in Google request")
  end
end

.search_in_bounding_box(term, bounding_box) ⇒ Object

just searches a term in a bounding box and returns points



23
24
25
26
27
 
# File 'lib/google_local.rb', line 23

def self.search_in_bounding_box(term, bounding_box)
  crawl(term, bounding_box.center, bounding_box.sspn).map do |i| 
    MapKit::Point.new(i["lat"].to_f, i["lng"].to_f)
  end
end