Fix POTA reference prefix validation (#109)

* Fix POTA reference prefix validation

* Update "what's new" for v0.1.7

doc/whats_new.md

@@ -1,11 +1,15 @@
 # What's new?
 
-## v0.1.6
+## v0.1.7
 
-* Support parsing 5-digit POTA reference numbers by @k0emt (issue #105).
+* Fix POTA reference prefix validation (issue #108).
 
 ## Previous releases
 
+### v0.1.6
+
+* Support parsing 5-digit POTA reference numbers by @k0emt (issue #105).
+
 ### v0.1.5
 
 * Fix "S2S contacts not recognized properly" (issue #78)

fleprocess/validate.go

@@ -51,10 +51,11 @@ func ValidateWwff(inputStr string) (ref, errorMsg string) {
 	return wrongInputStr, errorMsg
 }
 
-var validPotaRegexp = regexp.MustCompile(`^[\d]{0,1}[A-Z]{1,2}-[\d]{4,5}$`)
+var validPotaRegexp = regexp.MustCompile(`^[\d]{0,1}[A-Z]{1,2}[\d]{0,1}-[\d]{4,5}$`)
 
 // ValidatePota verifies whether the supplied string is a valid POTA reference.
 // The syntax is: AA-CCCCC: AA = national prefix, CCCCC = 4 or 5-digit numeric code (e.g. ON-00001).
+// Note that the national prefix can start with a number, must have 1 or 2, and can end with a number
 func ValidatePota(inputStr string) (ref, errorMsg string) {
 	inputStr = strings.ToUpper(strings.TrimSpace(inputStr))
 	wrongInputStr := "*" + inputStr

fleprocess/validate_test.go

@@ -88,6 +88,16 @@ func TestValidatePota(t *testing.T) {
 			args{inputStr: "4x-0258"},
 			"4X-0258", "",
 		},
+		{
+			"Good ref (country ref containing a digit)",
+			args{inputStr: "HB0-0258"},
+			"HB0-0258", "",
+		},
+		{
+			"Good ref (country ref containing a digit)",
+			args{inputStr: "E7-0258"},
+			"E7-0258", "",
+		},		
 		{
 			"Good ref (5 digit park)",
 			args{inputStr: "k-10177"},