forked from google/simhospital
/
postcode.go
58 lines (51 loc) · 1.59 KB
/
postcode.go
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// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package address
import (
"fmt"
"math/rand"
)
// UKPostcode is a generator of UK postcodes.
type UKPostcode struct{}
// Random returns a random string that matches the format of a UK post code:
// XX1 1XX or XX11 1XX
//
// Where:
// X is a random letter
// 1 is a random number between [1, 9]
//
// The returned postcode might exist or not.
func (g *UKPostcode) Random() string {
return fmt.Sprintf("%s%s%d %d%s%s", randomLetter(), randomLetter(), rand.Intn(99)+1, rand.Intn(9)+1, randomLetter(), randomLetter())
}
func randomLetter() string {
return string(rand.Intn(int('Z')-int('A')) + int('A'))
}
// USPostcode is a generator of US zipcodes.
type USPostcode struct{}
// Random returns a random string that matches the format of a US zipcode:
// 11111
//
// Where:
// 1 is a random number between [1, 9]
//
// The returned zipcode might exist or not.
func (g *USPostcode) Random() string {
chars := []rune("1234567890")
udn := make([]rune, 5)
for i := range udn {
udn[i] = chars[rand.Intn(len(chars))]
}
return string(udn)
}