44 lines
1.2 KiB
Go
44 lines
1.2 KiB
Go
package phone
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import (
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"errors"
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"regexp"
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"strings"
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)
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// Define the regex patterns as constants
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const (
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// TODO: This should rather use a phone package to determine whether valid phone number for any region.
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// Kenyan phone numbers: must be exactly 10 digits (07XXXXXXXX or 01XXXXXXXX) when starting with 0
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// Or start with 254 / +254 and still follow the same pattern
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phoneRegex = `^(?:\+254|254|0)(7\d{8}|1[01]\d{7})$`
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)
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// IsValidPhoneNumber checks if the given number is a valid phone number
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func IsValidPhoneNumber(phonenumber string) bool {
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match, _ := regexp.MatchString(phoneRegex, phonenumber)
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return match
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}
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// FormatPhoneNumber formats a Kenyan phone number to "+254xxxxxxxx".
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func FormatPhoneNumber(phone string) (string, error) {
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if !IsValidPhoneNumber(phone) {
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return "", errors.New("invalid phone number")
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}
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// Remove any leading "+" and spaces
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phone = strings.TrimPrefix(phone, "+")
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phone = strings.ReplaceAll(phone, " ", "")
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// Replace leading "0" with "254" if present
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if strings.HasPrefix(phone, "0") {
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phone = "254" + phone[1:]
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}
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// Add "+" if not already present
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if !strings.HasPrefix(phone, "254") {
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return "", errors.New("unexpected format")
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}
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return "+" + phone, nil
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}
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