Adding amex CSV import

Closes #105

Author: scottrobertson

README.md

@@ -36,6 +36,8 @@ As well as real-time webhooks, we also support bulk/historical imports for the f
 - [TSB](https://github.com/fintech-to-ynab/fintech-to-ynab/wiki/import:-Teller)
 - [Ulster Bank NI](https://github.com/fintech-to-ynab/fintech-to-ynab/wiki/import:-Teller)
 - [HSBC UK](https://github.com/fintech-to-ynab/fintech-to-ynab/wiki/import:-Teller)
+- [MBNA](https://github.com/fintech-to-ynab/fintech-to-ynab/wiki/Import:-CSV)
+- [Amex](https://github.com/fintech-to-ynab/fintech-to-ynab/wiki/Import:-CSV)
 
 *To request a new Bank/Financial Institution, please comment [here](https://github.com/fintech-to-ynab/fintech-to-ynab/issues/73).*
 

app/services/import/csv.rb

@@ -9,6 +9,7 @@ class Import::Csv
     'default' => 'Import::Csv',
     'starling' => 'Import::Csv::StarlingBank',
     'mbna' => 'Import::Csv::MBNA',
+    'amex' => 'Import::Csv::Amex',
   }
 
   def initialize(path, ynab_account_id)

app/services/import/csv/amex.rb

@@ -0,0 +1,31 @@
+require 'csv'
+
+# @note This is used to import Amex CSV Statements
+# Export the statement CSV from within the web app
+
+class Import::Csv::Amex
+  def initialize(path, ynab_account_id = ENV['YNAB_AMEX_ACCOUNT_ID'])
+    @path = path
+    @ynab_account_id = ynab_account_id
+    @import_id_creator = YNAB::ImportIdCreator.new
+  end
+
+  def import
+    transactions_to_create = []
+
+    ::CSV.foreach(@path) do |transaction|
+      amount = (transaction[1].to_f * 1000).to_i
+      date = Date.parse(transaction[0])
+
+      transactions_to_create << {
+        id: @import_id_creator.import_id(amount, date),
+        amount: amount,
+        payee_name: transaction[2],
+        date: date,
+        description: transaction[2]
+      }
+    end
+
+    YNAB::BulkTransactionCreator.new(transactions_to_create, account_id: @ynab_account_id).create
+  end
+end