[bisq-network/bisq] Validate phone numbers (#3134)

[battleofwizards]

battleofwizards commented on this pull request.



> +        this.callingCode = countryCallingCodes.getCallingCode(isoCountryCode);
+        this.normalizedCallingCode = countryCallingCodes.getNormalizedCallingCode(isoCountryCode);
+    }
+
+
+    @Override
+    public ValidationResult validate(String input) {
+        normalizedPhoneNumber = null;
+        ValidationResult result = super.validate(input);
+        if (!result.isValid) {
+            return result;
+        }
+        final String trimmedInput = input.trim();
+        boolean isCountryDialingCodeExplicit = trimmedInput.startsWith("+");
+        // remove non-digit chars:  plus sign, dashes, parens, hashes, slashes and white spaces
+        String pureNumber = input.replaceAll("[\\+\\s+()\\-\\−\\#\\\\]", "");

Sure but that does not change the essence. Remove everything that is not digit-or-letter. That is better approach than haunting for specific chars. Try `"[^A-Za-z0-9]"` and adjust regarding expected capitalization.

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