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Introduce a Location class.

Akinori MUSHA 10 年 前
親
1784eeb38a
コミット
b25142e793
共有4 個のファイルを変更した、143 個の追加 と 43 個の削除を含む
差分情報を表示
  1. 8 19
      app/models/event.rb
  2. 82 0
      lib/location.rb
  3. 49 0
      spec/lib/location_spec.rb
  4. 4 24
      spec/models/event_spec.rb

+ 8 - 19
app/models/event.rb
ファイルの表示 

@@ -1,3 +1,5 @@
1 
+require 'location'
2 
+
1 3 
 # Events are how Huginn Agents communicate and log information about the world.  Events can be emitted and received by
2 4 
 # Agents.  They contain a serialized `payload` of arbitrary JSON data, as well as optional `lat`, `lng`, and `expires_at`
3 5 
 # fields.
 
@@ -33,10 +35,10 @@ class Event < ActiveRecord::Base
33 35 
   }
34 36
35 37 
   def location
36 
-    @location ||= {
37 
-      # lat and lng are BigDecimal, so convert them to Float
38 
-      lat: (lat.to_f if lat),
39 
-      lng: (lng.to_f if lng),
38 
+    @location ||= Location.new(
39 
+      # lat and lng are BigDecimal, but converted to Float by the Location class
40 
+      lat: lat,
41 
+      lng: lng,
40 42 
       radius:
41 43 
         begin
42 44 
           h = payload[:horizontal_accuracy].presence
 
@@ -47,21 +49,8 @@ class Event < ActiveRecord::Base
47 49 
             (h || v || payload[:accuracy]).to_f
48 50 
           end
49 51 
         end,
50 
-      course:
51 
-        begin
52 
-          if (v = payload[:course].presence) &&
53 
-             (v = v.to_f) >= 0
54 
-            v
55 
-          end
56 
-        end,
57 
-      speed:
58 
-        begin
59 
-          if (v = payload[:speed].presence) &&
60 
-             (v = v.to_f) >= 0
61 
-            v
62 
-          end
63 
-        end,
64 
-    }
52 
+      course: payload[:course],
53 
+      speed: payload[:speed].presence)
65 54 
   end
66 55
67 56 
   # Emit this event again, as a new Event.

+ 82 - 0
lib/location.rb
ファイルの表示 

@@ -0,0 +1,82 @@
1 
+Location = Struct.new(:lat, :lng, :radius, :speed, :course)
2 
+
3 
+class Location
4 
+  protected :[]=
5 
+
6 
+  def initialize(data = {})
7 
+    super()
8 
+
9 
+    case data
10 
+    when Array
11 
+      raise ArgumentError, 'unsupported location data' unless data.size == 2
12 
+      self.lat, self.lng = data
13 
+    when Hash, Location
14 
+      data.each { |key, value|
15 
+        begin
16 
+          __send__("#{key}=", value)
17 
+        rescue NameError
18 
+        end
19 
+      }
20 
+    else
21 
+      raise ArgumentError, 'unsupported location data'
22 
+    end
23 
+
24 
+    yield self if block_given?
25 
+  end
26 
+
27 
+  def lat=(value)
28 
+    self[:lat] = floatify(value) { |f|
29 
+      if f.abs <= 90
30 
+        f
31 
+      else
32 
+        raise ArgumentError, 'out of bounds'
33 
+      end
34 
+    }
35 
+  end
36 
+
37 
+  def lng=(value)
38 
+    self[:lng] = floatify(value) { |f|
39 
+      if f.abs <= 180
40 
+        f
41 
+      else
42 
+        raise ArgumentError, 'out of bounds'
43 
+      end
44 
+    }
45 
+  end
46 
+
47 
+  def radius=(value)
48 
+    self[:radius] = floatify(value) { |f| f if f >= 0 }
49 
+  end
50 
+
51 
+  def speed=(value)
52 
+    self[:speed] = floatify(value) { |f| f if f >= 0 }
53 
+  end
54 
+
55 
+  def course=(value)
56 
+    self[:course] = floatify(value) { |f| f if (0..360).cover?(f) }
57 
+  end
58 
+
59 
+  def present?
60 
+    lat && lng
61 
+  end
62 
+
63 
+  def empty?
64 
+    !present?
65 
+  end
66 
+
67 
+  private
68 
+
69 
+  def floatify(value)
70 
+    case value
71 
+    when nil, ''
72 
+      return nil
73 
+    else
74 
+      float = Float(value)
75 
+      if block_given?
76 
+        yield(float)
77 
+      else
78 
+        float
79 
+      end
80 
+    end
81 
+  end
82 
+end

+ 49 - 0
spec/lib/location_spec.rb
ファイルの表示 

@@ -0,0 +1,49 @@
1 
+require 'spec_helper'
2 
+
3 
+describe Location do
4 
+  let(:location) {
5 
+    Location.new(
6 
+      lat: BigDecimal.new('2.0'),
7 
+      lng: BigDecimal.new('3.0'),
8 
+      radius: 300,
9 
+      speed: 2,
10 
+      course: 30)
11 
+  }
12 
+
13 
+  it "converts values to Float" do
14 
+    expect(location.lat).to equal 2.0
15 
+    expect(location.lng).to equal 3.0
16 
+    expect(location.radius).to equal 300.0
17 
+    expect(location.speed).to equal 2.0
18 
+    expect(location.course).to equal 30.0
19 
+  end
20 
+
21 
+  it "provides hash-style access to its properties with both symbol and string keys" do
22 
+    expect(location[:lat]).to equal 2.0
23 
+    expect(location['lat']).to equal 2.0
24 
+  end
25 
+
26 
+  it "does not allow hash-style assignment" do
27 
+    expect {
28 
+      location[:lat] = 2.0
29 
+    }.to raise_error
30 
+  end
31 
+
32 
+  it "ignores invalid values" do
33 
+    location2 = Location.new(
34 
+      lat: 2,
35 
+      lng: 3,
36 
+      radius: -1,
37 
+      speed: -1,
38 
+      course: -1)
39 
+    expect(location2.radius).to be_nil
40 
+    expect(location2.speed).to be_nil
41 
+    expect(location2.course).to be_nil
42 
+  end
43 
+
44 
+  it "considers a location empty if either latitude or longitude is missing" do
45 
+    expect(Location.new.empty?).to be_truthy
46 
+    expect(Location.new(lat: 2, radius: 1).present?).to be_falsy
47 
+    expect(Location.new(lng: 3, radius: 1).present?).to be_falsy
48 
+  end
49 
+end

+ 4 - 24
spec/models/event_spec.rb
ファイルの表示 

@@ -18,13 +18,12 @@ describe Event do
18 18 
   describe "#location" do
19 19 
     it "returns a default hash when an event does not have a location" do
20 20 
       event = events(:bob_website_agent_event)
21 
-      event.location.should == {
21 
+      event.location.should == Location.new(
22 22 
         lat: nil,
23 23 
         lng: nil,
24 24 
         radius: 0.0,
25 25 
         speed: nil,
26 
-        course: nil,
27 
-      }
26 
+        course: nil)
28 27 
     end
29 28
30 29 
     it "returns a hash containing location information" do
 
@@ -37,31 +36,12 @@ describe Event do
37 36 
         course: 90.0,
38 37 
       }
39 38 
       event.save!
40 
-      event.location.should == {
39 
+      event.location.should == Location.new(
41 40 
         lat: 2.0,
42 41 
         lng: 3.0,
43 42 
         radius: 0.0,
44 43 
         speed: 0.5,
45 
-        course: 90.0,
46 
-      }
47 
-    end
48 
-
49 
-    it "ignores invalid speed and course" do
50 
-      event = events(:bob_website_agent_event)
51 
-      event.lat = 2
52 
-      event.lng = 3
53 
-      event.payload = {
54 
-        speed: -1,
55 
-        course: -1,
56 
-      }
57 
-      event.save!
58 
-      event.location.should == {
59 
-        lat: 2.0,
60 
-        lng: 3.0,
61 
-        radius: 0.0,
62 
-        speed: nil,
63 
-        course: nil,
64 
-      }
44 
+        course: 90.0)
65 45 
     end
66 46 
   end
67 47