Move unlocalize_currency filter to a PriceParser service

- It's no longer a filter but more a service: it's therefore more logic.

app/assets/javascripts/admin/utils/services/price_parser.js.coffee

@@ -0,0 +1,24 @@
+angular.module("admin.utils").factory "PriceParser", ->
+  new class PriceParser
+    parse: (price) =>
+      return null unless price
+      # used decimal and thousands separators from currency configuration
+      decimal_separator = I18n.toCurrency(.1, {precision: 1, unit: ''}).substring(1,2)
+      thousands_separator = I18n.toCurrency(1000, {precision: 1, unit: ''}).substring(1,2)
+      
+      # Replace comma used as a decimal separator and remplace by "."
+      if (price.match(/^[0-9]*(,{1})[0-9]{1,2}$/g))
+        price = price.replace(",", ".")
+
+      # Remove configured thousands separator if it is actually a thousands separator
+      if (new RegExp("^([0-9]*(" + thousands_separator + "{1})[0-9]{3}[0-9\.,]*)*$", "g").test(price))
+        price = price.replaceAll(thousands_separator, '')
+
+      if (decimal_separator == ",")
+        price = price.replace(",", ".")
+
+      price = parseFloat(price)
+
+      return null if isNaN(price)
+
+      return price