/*
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* Copyright (C) 2011 ZXing authors
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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package com.zxing.scanner.encode;
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import java.util.Collection;
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import java.util.HashSet;
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import java.util.List;
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/**
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* Implementations encode according to some scheme for encoding contact information, like VCard or
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* MECARD.
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*
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* @author Sean Owen
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*/
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abstract class ContactEncoder {
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/**
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* @return first, the best effort encoding of all data in the appropriate format; second, a
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* display-appropriate version of the contact information
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*/
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abstract String[] encode(List<String> names,
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String organization,
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List<String> addresses,
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List<String> phones,
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List<String> phoneTypes,
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List<String> emails,
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List<String> urls,
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String note);
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/**
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* @return null if s is null or empty, or result of s.trim() otherwise
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*/
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static String trim(String s) {
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if (s == null) {
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return null;
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}
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String result = s.trim();
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return result.isEmpty() ? null : result;
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}
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static void append(StringBuilder newContents,
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StringBuilder newDisplayContents,
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String prefix,
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String value,
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Formatter fieldFormatter,
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char terminator) {
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String trimmed = trim(value);
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if (trimmed != null) {
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newContents.append(prefix).append(fieldFormatter.format(trimmed, 0)).append(terminator);
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newDisplayContents.append(trimmed).append('\n');
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}
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}
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static void appendUpToUnique(StringBuilder newContents,
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StringBuilder newDisplayContents,
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String prefix,
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List<String> values,
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int max,
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Formatter displayFormatter,
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Formatter fieldFormatter,
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char terminator) {
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if (values == null) {
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return;
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}
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int count = 0;
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Collection<String> uniques = new HashSet<>(2);
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for (int i = 0; i < values.size(); i++) {
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String value = values.get(i);
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String trimmed = trim(value);
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if (trimmed != null && !trimmed.isEmpty() && !uniques.contains(trimmed)) {
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newContents.append(prefix).append(fieldFormatter.format(trimmed, i)).append(terminator);
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CharSequence display = displayFormatter == null ? trimmed : displayFormatter.format(trimmed, i);
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newDisplayContents.append(display).append('\n');
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if (++count == max) {
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break;
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}
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uniques.add(trimmed);
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}
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}
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}
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}
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