Initial commit

app/api/v2/management/transfers.rb

@@ -0,0 +1,98 @@
+# encoding: UTF-8
+# frozen_string_literal: true
+
+module API
+  module V2
+    module Management
+      class Transfers < Grape::API
+        # TODO: Add endpoints for listing Transfer/Transfers.
+
+        desc 'Creates new transfer.' do
+          @settings[:scope] = :write_transfers
+        end
+        params do
+          requires :key,
+                   type: String,
+                   desc: 'Unique Transfer Key.'
+          requires :category,
+                   type: String,
+                   desc: 'Transfer Category.'
+          optional :description,
+                   type: String,
+                   desc: 'Transfer Description.'
+
+          requires(:operations, type: Array, allow_blank: false) do
+            requires :currency,
+                     type: String,
+                     values: -> { Currency.codes(bothcase: true) },
+                     desc: 'Operation currency.'
+            requires :amount,
+                     type: BigDecimal,
+                     values: ->(v) { v.to_d.positive? },
+                     desc: 'Operation amount.'
+
+            requires :account_src, type: Hash do
+              requires :code,
+                       type: Integer,
+                       values: -> { ::Operations::Account.pluck(:code) },
+                       desc: 'Source Account code.'
+              given code: ->(code) { ::Operations::Account.find_by(code: code).try(:scope).try(:member?) } do
+                requires :uid,
+                         type: String,
+                         desc: 'Source Account User ID (for accounts with member scope).'
+              end
+            end
+
+            requires :account_dst, type: Hash do
+              requires :code,
+                       type: Integer,
+                       values: -> { ::Operations::Account.pluck(:code) },
+                       desc: 'Destination Account code.'
+              given code: ->(code) { ::Operations::Account.find_by(code: code).try(:scope).try(:member?) } do
+                requires :uid,
+                         type: String,
+                         desc: 'Destination Account User ID (for accounts with member scope).'
+              end
+            end
+          end
+        end
+        post '/transfers/new' do
+          declared_params = declared(params)
+
+          attrs = declared_params.slice(:key, :category, :description)
+
+          declared_params[:operations].each do |op_pair|
+            currency = Currency.find(op_pair[:currency])
+
+            debit_op = op_pair[:account_src].merge(debit: op_pair[:amount], credit: 0.0, currency: currency)
+            credit_op = op_pair[:account_dst].merge(credit: op_pair[:amount], debit: 0.0, currency: currency)
+
+            [debit_op, credit_op].each do |op|
+              klass = ::Operations.klass_for(code: op['code'])
+
+              uid = op.delete(:uid)
+              op.merge!(member: Member.find_by!(uid: uid)) if uid.present?
+
+              type = ::Operations::Account.find_by(code: op[:code]).type
+              type_plural = type.pluralize
+              if attrs[type_plural].present?
+                attrs[type_plural].push(klass.new(op))
+              else
+                attrs[type_plural] = [klass.new(op)]
+              end
+            end
+          end
+
+          present Transfer.create!(attrs), with: Entities::Transfer
+          status 201
+        rescue ActiveRecord::RecordInvalid => e
+          body errors: e.message
+          status 422
+        rescue ::Account::AccountError => e
+          body errors: "Account balance is insufficient (#{e.message})"
+          status 422
+        end
+      end
+    end
+  end
+end