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69 lines
2.1 KiB
69 lines
2.1 KiB
package cmd
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/*
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Copyright © 2020 Jean-Marc Meessen, ON4KJM <on4kjm@gmail.com>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import (
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"regexp"
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"strings"
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)
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var validCallRegexp = regexp.MustCompile(`[\d]{0,1}[A-Z]{1,2}\d([A-Z]{1,4}|\d{3,3}|\d{1,3}[A-Z])[A-Z]{0,5}`)
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var validPrefixRegexp = regexp.MustCompile(`\A\d?[a-zA-Z]{1,2}$`)
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// ValidateCall veriffies whether the supplied string is a valid callsign.
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// prefix and suffix are not checked for validity
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// If it is not valid, the supicious string is prefixed with a * and an erroMsg is genrated.
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func ValidateCall(sign string) (call, errorMsg string) {
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sign = strings.ToUpper(strings.TrimSpace(sign))
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sp := strings.Split(sign, "/")
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wrongSign := "*" + sign
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switch len(sp) {
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case 1:
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if validCallRegexp.MatchString(sign) {
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return sign, ""
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}
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return wrongSign, "Invalid call"
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case 2:
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// some ambiguity here we need to resolve, could be a prefix or a suffix
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if validCallRegexp.MatchString(sp[0]) {
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//Callisign with suffix (unchecked)
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return sign, ""
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}
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//else we are dealing with a prefixed Callsign
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//validate the part that should contain the call (sp[1])
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if !validCallRegexp.MatchString(sp[1]) {
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return wrongSign, "Invalid call"
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}
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//validate the prefix
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if !validPrefixRegexp.MatchString(sp[0]) {
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return wrongSign, "Invalid prefix"
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}
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return sign, ""
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case 3:
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//validate the part that should contain the call (sp[1])
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if !validCallRegexp.MatchString(sp[1]) {
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return wrongSign, "Invalid call"
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}
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//validate the prefix
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if !validPrefixRegexp.MatchString(sp[0]) {
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return wrongSign, "Invalid prefix"
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}
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//We don't check the suffix
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return sign, ""
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}
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return wrongSign, "Too many '/'"
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} |