Added address class and errors

ref #1

src/models/Address.ts

@@ -0,0 +1,80 @@
+import {
+  IsPostalCode,
+  IsString
+} from "class-validator";
+import ValidatorJS from 'validator';
+import { config } from '../../config';
+import { AddressCityEmptyError, AddressCountryEmptyError, AddressFirstLineEmptyError, AddressPostalCodeEmptyError, AddressPostalCodeInvalidError } from '../../errors/AddressErrors';
+
+/**
+ * Defines the Address class.
+ * Implemented this way to prevent any formatting differences.
+*/
+export class Address {
+  /**
+   * The address's first line.
+   * Containing the street and house number.
+   */
+  @IsString()
+  address1?: string;
+
+  /**
+   * The address's second line.
+   * Containing optional information.
+   */
+  @IsString()
+  address2?: string;
+
+  /**
+   * The address's postal code.
+   * This will get checked against the postal code syntax for the configured country.
+   */
+  @IsString()
+  @IsPostalCode(config.postalcode_validation_countrycode)
+  postalcode: string;
+
+  /**
+   * The address's city.
+   */
+  @IsString()
+  city: string;
+
+  /**
+   * The address's country.
+   */
+  @IsString()
+  country: string;
+
+  public reset() {
+    this.address1 = null;
+    this.address2 = null;
+    this.city = null;
+    this.country = null;
+    this.postalcode = null;
+  }
+
+  /**
+   * Checks if this is a valid address
+   */
+  public static isValidAddress(address: Address): Boolean {
+    if (address == null) { return false; }
+    if (address.address1 == null || address.city == null || address.country == null || address.postalcode == null) { return false; }
+    if (ValidatorJS.isPostalCode(address.postalcode, config.postalcode_validation_countrycode) == false) { return false; }
+    return true;
+  }
+
+  /**
+   * This function validates addresses.
+   * This is a workaround for non-existant class validation for embedded entities.
+   * @param address The address that shall get validated.
+   */
+  public static validate(address: Address) {
+    if (address == null) { return; }
+    if (address.address1 == null && address.city == null && address.country == null && address.postalcode == null) { return; }
+    if (address.address1 == null) { throw new AddressFirstLineEmptyError(); }
+    if (address.postalcode == null) { throw new AddressPostalCodeEmptyError(); }
+    if (address.city == null) { throw new AddressCityEmptyError(); }
+    if (address.country == null) { throw new AddressCountryEmptyError(); }
+    if (ValidatorJS.isPostalCode(address.postalcode.toString(), config.postalcode_validation_countrycode) == false) { throw new AddressPostalCodeInvalidError(); }
+  }
+}