Design updates with error handling

README.md

@@ -1,8 +1,11 @@
-# StrikeMe::API
+StrikeMe::API
+==============
 
 This is a ruby gem to interact with the strike.me API. It is an inition proof of concept implementation.
+As a reference, the documentation of the [Strike API](https://docs.strike.me/api)
 
-## Installation
+Installation
+-------------
 
 TODO: Replace `strike_me-api` with your gem name right after releasing it to RubyGems.org. Please do not do it earlier due to security reasons. Alternatively, replace this section with instructions to install your gem from git if you don't plan to release to RubyGems.org.
 
@@ -18,9 +21,25 @@ If bundler is not being used to manage dependencies, install the gem by executin
 gem install strike_me-api
 ```
 
-## Usage
+Playground
+-----------------
+To play around with this api you can start a REPL using one of the following commands from the project's root:
+```bash
+pry -r strike_me/api
+# or
+irb -I lib -r strike_me/api
+```
+Then type code like:
+```ruby
+account = StrikeMe::API::Account.new
+account.profile.attributes
+account.balances.map(&:attributes)
+```
 
-TODO: Write usage instructions here
+Usage
+--------------
+
+TODO: Write usage instructions here, for now, look at Playground
 
 ## Development
 

lib/strike_me/api/account.rb

@@ -2,6 +2,8 @@
 
 module StrikeMe
   module API
+
+    # Factory helper object connecting the client to the models
     class Account
       include BaseClient
 
@@ -12,14 +14,15 @@ module StrikeMe
       def profile
         return @profile if @profile.present?
 
-        response = client.get profile_url
+        url = profile_url
+        response = client.get url
+        #body = response.body.presence
+        #body = JSON.parse(body) if body.is_a? String
         if response.success?
-          body = response.body
-          body = JSON.parse(body) if body.is_a? String
-          @profile = Profile.new body.merge(account: self)
+          @profile = Profile.new response.body.merge(account: self)
         else
           # if you see this, something went wrong, this is test code
-          @profile = ResponseError.new(profile_url, response)
+          raise ResponseError.new(url, response.body)
         end
       end
 
@@ -36,11 +39,10 @@ module StrikeMe
         return @balances if @balances.present?
 
         response = client.get 'balances'
-        @balances = if response.success?
-                      Balances.new self, response.body
+        if response.success?
+          @balances = Balances.new self, response.body
         else
-                      # if you see this, something went wrong, this is test code
-                      ResponseError.new('balances', response)
+          raise ResponseError.new('balances', response.body)
         end
       end
 

lib/strike_me/api/account/balances.rb

@@ -21,6 +21,10 @@ module StrikeMe
         def to_a
           @items.map(&:attributes)
         end
+
+        def btc
+          @items.find { |item| item.currency == 'BTC' }
+        end
       end
     end
   end

lib/strike_me/api/base_client.rb

@@ -19,13 +19,21 @@ module StrikeMe
       end
 
       # cumbersome, but better for later debugging and handling
-      class ResponseError
-        attr_reader :url, :faraday_response
+      class ResponseError < StandardError
+        attr_reader :url, :response_body, :status, :reason
 
-        def initialize(url, faraday_response)
+        def initialize(url, response_body)
+          @reason = response_body.try(:[], 'data').try(:[], 'message')
+          @status  = response_body.try(:[], 'data').try(:[], 'status')
+
+          super "[#{status}, {}, [\"#{reason}\"]]" if reason
           @url = url
-          @faraday_response = faraday_response
+          @response_body = response_body
         end
+
+        # def inspect
+        #   "StrikeMe::API::BaseClient::ResponseError: #{url} status: #{faraday_response.status}"
+        # end
       end
     end
   end

lib/strike_me/api/client.rb

@@ -3,9 +3,7 @@
 module StrikeMe
   module API
     class Client
-      attr_reader :version, :connection
-
-      delegate :get, to: :connection
+      attr_reader :version, :connection, :last_response
 
       def initialize(**args)
         @version = args[:version] || 'v1'
@@ -23,6 +21,11 @@ module StrikeMe
           builder.response :json
         end
       end
+
+      #delegate :get, to: :connection
+      def get(...)
+        @last_response = connection.get(...)
+      end
     end
   end
 end

lib/strike_me/btc.rb

@@ -25,7 +25,6 @@ module StrikeMe
     class Error < StandardError; end
 
     MAX_NUMBER_OF_SATS = 21_000_000 * 100_000_000
-    NUMERICAL_OPERATORS = %i[* /].freeze
 
     attr_reader :sats
 

lib/strike_me/btc_attribute_type.rb

@@ -7,7 +7,7 @@ module StrikeMe
     end
 
     def cast(value)
-      StrikeMe::BTC.new((100_000_000 * value.to_f).to_i)
+      StrikeMe::BTC.new((100_000_000 * value.to_f).round)
     end
 
     def serialize(value)
@@ -16,4 +16,4 @@ module StrikeMe
   end
 end
 
-ActiveModel::Type.register(:btc, StrikeMe::BtcAttributeType)
+ActiveModel::Type.register(:strike_btc, StrikeMe::BtcAttributeType)

spec/strike_me/api/account_spec.rb

@@ -10,7 +10,7 @@ RSpec.describe StrikeMe::API::Account do
       allow(ENV).to receive(:[])
       expect(ENV).to receive(:[]).with('STRIKE_ACCOUNT_ID').and_return 'abc'
       stub_request(:get, %r{https://api.strike.me/v1/accounts/abc/profile})
-        .to_return(status: 200, body: '{"id":"abc44"}')
+        .to_return(status: 200, body: '{"id":"abc44"}', headers: {'Content-Type' => 'application/json'})
       expect(subject.id).to eq 'abc44'
     end
 
@@ -19,16 +19,66 @@ RSpec.describe StrikeMe::API::Account do
       allow(ENV).to receive(:fetch)
       expect(ENV).to receive(:fetch).with('STRIKE_ACCOUNT_HANDLE').and_return 'abcd'
       stub_request(:get, %r{https://api.strike.me/v1/accounts/handles/abcd/profile})
-        .to_return(status: 200, body: '{"id":"abc44"}')
+        .to_return(status: 200, body: '{"id":"abc44"}', headers: {'Content-Type' => 'application/json'})
       expect(subject.id).to eq 'abc44'
     end
+
+    it 'throws exception when unauthorized' do
+      allow(ENV).to receive(:[])
+      expect(ENV).to receive(:[]).with('STRIKE_ACCOUNT_ID').and_return 'abc'
+      stub_request(:get, %r{https://api.strike.me/v1/accounts/abc/profile})
+        .to_return(status: 401, body: '{"data":{"status":401,"code":"UNAUTHORIZED","message":"Invalid or unspecified identity."}}', headers: {'Content-Type' => 'application/json'})
+      expect{ subject.id }.to raise_error '[401, {}, ["Invalid or unspecified identity."]]'
+    end
   end
 
   describe 'balances' do
     subject { described_class.new.balances }
 
-    before { stub_request(:get, 'https://api.strike.me/v1/balances').to_return(status: 200, body: []) }
+    before { stub_request(:get, 'https://api.strike.me/v1/balances').to_return(status: 200, body: '[{"currency":"BTC","current":"0.00085408","pending":"0.000023","outgoing":"0.00000532","reserved":"0.00234","available":"0.00085408","total":"0.00085408"},{"currency":"USDT","current":"50.04","pending":"40.06","outgoing":"60.15","reserved":"0.00","available":"0.00","total":"0.00"}]', headers: {'Content-Type' => 'application/json'}) }
 
     it { is_expected.to be_an_instance_of StrikeMe::API::Account::Balances }
+
+    it '#to_a properly returns the attributes' do
+      expect(subject.to_a).to eq [
+        {
+          "currency"  => "BTC",
+          "current"   => 0.00085408,
+          "pending"   => 2.3e-05,
+          "outgoing"  => 5.32e-06,
+          "reserved"  => 0.00234,
+          "available" => 0.00085408,
+          "total"     => 0.00085408
+        }, {
+          "currency"  => "USDT",
+          "current"   => 50.04,
+          "pending"   => 40.06,
+          "outgoing"  => 60.15,
+          "reserved"  => 0.0,
+          "available" => 0.0,
+          "total"     => 0.0
+        }]
+    end
+
+    it '#btc returns the BTC balance' do
+      btc = subject.btc
+      expect(btc).to be_present
+      expect(btc).to be_a StrikeMe::API::Account::Balance
+      expect(btc.attributes).to eq(
+        "available" => 0.00085408,
+        "currency"  => "BTC",
+        "current"   => 0.00085408,
+        "outgoing"  => 5.32e-06,
+        "pending"   => 2.3e-05,
+        "reserved"  => 0.00234,
+        "total"     => 0.00085408
+      )
+    end
+
+    it 'raises error when not authorized' do
+      stub_request(:get, %r{https://api.strike.me/v1/balances})
+        .to_return(status: 401, body: '{"data":{"status":403,"code":"FORBIDDEN","message":"Insufficient permissions."}}', headers: {'Content-Type' => 'application/json'})
+      expect{ subject }.to raise_error '[403, {}, ["Insufficient permissions."]]'
+    end
   end
 end

spec/strike_me/btc_spec.rb

@@ -44,7 +44,7 @@ RSpec.describe StrikeMe::BTC do
 
   context 'arithmetic' do
     it 'supports multiplication with numbers' do
-      btc1 = described_class.new(234_529)
+      btc1 = described_class.new 234_529
       btc2 = btc1 * 3
       btc3 = btc2 * 2.9
 
@@ -61,7 +61,7 @@ RSpec.describe StrikeMe::BTC do
     end
 
     it 'supports division with numbers' do
-      btc1 = described_class.new(34_529)
+      btc1 = described_class.new 34_529
       btc2 = btc1 / 3
       btc3 = btc2 / 2.9
 
@@ -89,8 +89,8 @@ RSpec.describe StrikeMe::BTC do
     end
 
     it 'supports subtraction with other BTC objects' do
-      btc1 = described_class.new(34_529)
-      btc2 = described_class.new(2_556)
+      btc1 = described_class.new 34_529
+      btc2 = described_class.new  2_556
       btc3 = btc1 - btc2
 
       expect { btc1 - 23 }.to raise_error StrikeMe::BTC::Error
@@ -101,6 +101,7 @@ RSpec.describe StrikeMe::BTC do
   end
 
   it 'is consistent for small values' do
+    # if floor is used instead of round, the small number 3, multiplied by 100 million can result in 2.99999999 leading to 2
     string = 3.sats.to_s
     expect(string).to eq '0.00000003'
     expect(string.to_f.btc.sats).to eq 3