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moved java files for pre-convert
This commit is contained in:
Henry Schimke
374
src/client/result/VCardResultParser.java
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374
src/client/result/VCardResultParser.java
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/*
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* Copyright 2008 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.google.zxing.client.result;
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import com.google.zxing.Result;
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import java.io.ByteArrayOutputStream;
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import java.io.UnsupportedEncodingException;
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import java.net.URI;
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import java.nio.charset.StandardCharsets;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* Parses contact information formatted according to the VCard (2.1) format. This is not a complete
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* implementation but should parse information as commonly encoded in 2D barcodes.
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*
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* @author Sean Owen
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*/
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public final class VCardResultParser extends ResultParser {
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private static final Pattern BEGIN_VCARD = Pattern.compile("BEGIN:VCARD", Pattern.CASE_INSENSITIVE);
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private static final Pattern VCARD_LIKE_DATE = Pattern.compile("\\d{4}-?\\d{2}-?\\d{2}");
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private static final Pattern CR_LF_SPACE_TAB = Pattern.compile("\r\n[ \t]");
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private static final Pattern NEWLINE_ESCAPE = Pattern.compile("\\\\[nN]");
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private static final Pattern VCARD_ESCAPES = Pattern.compile("\\\\([,;\\\\])");
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private static final Pattern EQUALS = Pattern.compile("=");
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private static final Pattern SEMICOLON = Pattern.compile(";");
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private static final Pattern UNESCAPED_SEMICOLONS = Pattern.compile("(?<!\\\\);+");
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private static final Pattern COMMA = Pattern.compile(",");
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private static final Pattern SEMICOLON_OR_COMMA = Pattern.compile("[;,]");
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@Override
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public AddressBookParsedResult parse(Result result) {
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// Although we should insist on the raw text ending with "END:VCARD", there's no reason
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// to throw out everything else we parsed just because this was omitted. In fact, Eclair
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// is doing just that, and we can't parse its contacts without this leniency.
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String rawText = getMassagedText(result);
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Matcher m = BEGIN_VCARD.matcher(rawText);
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if (!m.find() || m.start() != 0) {
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return null;
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}
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List<List<String>> names = matchVCardPrefixedField("FN", rawText, true, false);
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if (names == null) {
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// If no display names found, look for regular name fields and format them
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names = matchVCardPrefixedField("N", rawText, true, false);
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formatNames(names);
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}
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List<String> nicknameString = matchSingleVCardPrefixedField("NICKNAME", rawText, true, false);
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String[] nicknames = nicknameString == null ? null : COMMA.split(nicknameString.get(0));
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List<List<String>> phoneNumbers = matchVCardPrefixedField("TEL", rawText, true, false);
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List<List<String>> emails = matchVCardPrefixedField("EMAIL", rawText, true, false);
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List<String> note = matchSingleVCardPrefixedField("NOTE", rawText, false, false);
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List<List<String>> addresses = matchVCardPrefixedField("ADR", rawText, true, true);
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List<String> org = matchSingleVCardPrefixedField("ORG", rawText, true, true);
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List<String> birthday = matchSingleVCardPrefixedField("BDAY", rawText, true, false);
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if (birthday != null && !isLikeVCardDate(birthday.get(0))) {
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birthday = null;
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}
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List<String> title = matchSingleVCardPrefixedField("TITLE", rawText, true, false);
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List<List<String>> urls = matchVCardPrefixedField("URL", rawText, true, false);
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List<String> instantMessenger = matchSingleVCardPrefixedField("IMPP", rawText, true, false);
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List<String> geoString = matchSingleVCardPrefixedField("GEO", rawText, true, false);
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String[] geo = geoString == null ? null : SEMICOLON_OR_COMMA.split(geoString.get(0));
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if (geo != null && geo.length != 2) {
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geo = null;
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}
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return new AddressBookParsedResult(toPrimaryValues(names),
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nicknames,
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null,
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toPrimaryValues(phoneNumbers),
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toTypes(phoneNumbers),
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toPrimaryValues(emails),
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toTypes(emails),
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toPrimaryValue(instantMessenger),
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toPrimaryValue(note),
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toPrimaryValues(addresses),
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toTypes(addresses),
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toPrimaryValue(org),
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toPrimaryValue(birthday),
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toPrimaryValue(title),
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toPrimaryValues(urls),
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geo);
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}
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static List<List<String>> matchVCardPrefixedField(CharSequence prefix,
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String rawText,
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boolean trim,
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boolean parseFieldDivider) {
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List<List<String>> matches = null;
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int i = 0;
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int max = rawText.length();
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while (i < max) {
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// At start or after newline, match prefix, followed by optional metadata
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// (led by ;) ultimately ending in colon
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Matcher matcher = Pattern.compile("(?:^|\n)" + prefix + "(?:;([^:]*))?:",
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Pattern.CASE_INSENSITIVE).matcher(rawText);
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if (i > 0) {
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i--; // Find from i-1 not i since looking at the preceding character
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}
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if (!matcher.find(i)) {
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break;
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}
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i = matcher.end(0); // group 0 = whole pattern; end(0) is past final colon
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String metadataString = matcher.group(1); // group 1 = metadata substring
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List<String> metadata = null;
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boolean quotedPrintable = false;
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String quotedPrintableCharset = null;
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String valueType = null;
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if (metadataString != null) {
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for (String metadatum : SEMICOLON.split(metadataString)) {
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if (metadata == null) {
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metadata = new ArrayList<>(1);
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}
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metadata.add(metadatum);
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String[] metadatumTokens = EQUALS.split(metadatum, 2);
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if (metadatumTokens.length > 1) {
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String key = metadatumTokens[0];
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String value = metadatumTokens[1];
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if ("ENCODING".equalsIgnoreCase(key) && "QUOTED-PRINTABLE".equalsIgnoreCase(value)) {
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quotedPrintable = true;
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} else if ("CHARSET".equalsIgnoreCase(key)) {
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quotedPrintableCharset = value;
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} else if ("VALUE".equalsIgnoreCase(key)) {
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valueType = value;
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}
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}
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}
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}
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int matchStart = i; // Found the start of a match here
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while ((i = rawText.indexOf('\n', i)) >= 0) { // Really, end in \r\n
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if (i < rawText.length() - 1 && // But if followed by tab or space,
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(rawText.charAt(i + 1) == ' ' || // this is only a continuation
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rawText.charAt(i + 1) == '\t')) {
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i += 2; // Skip \n and continutation whitespace
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} else if (quotedPrintable && // If preceded by = in quoted printable
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((i >= 1 && rawText.charAt(i - 1) == '=') || // this is a continuation
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(i >= 2 && rawText.charAt(i - 2) == '='))) {
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i++; // Skip \n
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} else {
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break;
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}
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}
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if (i < 0) {
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// No terminating end character? uh, done. Set i such that loop terminates and break
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i = max;
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} else if (i > matchStart) {
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// found a match
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if (matches == null) {
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matches = new ArrayList<>(1); // lazy init
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}
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if (i >= 1 && rawText.charAt(i - 1) == '\r') {
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i--; // Back up over \r, which really should be there
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}
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String element = rawText.substring(matchStart, i);
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if (trim) {
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element = element.trim();
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}
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if (quotedPrintable) {
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element = decodeQuotedPrintable(element, quotedPrintableCharset);
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if (parseFieldDivider) {
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element = UNESCAPED_SEMICOLONS.matcher(element).replaceAll("\n").trim();
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}
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} else {
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if (parseFieldDivider) {
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element = UNESCAPED_SEMICOLONS.matcher(element).replaceAll("\n").trim();
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}
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element = CR_LF_SPACE_TAB.matcher(element).replaceAll("");
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element = NEWLINE_ESCAPE.matcher(element).replaceAll("\n");
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element = VCARD_ESCAPES.matcher(element).replaceAll("$1");
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}
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// Only handle VALUE=uri specially
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if ("uri".equals(valueType)) {
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// Don't actually support dereferencing URIs, but use scheme-specific part not URI
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// as value, to support tel: and mailto:
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try {
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element = URI.create(element).getSchemeSpecificPart();
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} catch (IllegalArgumentException iae) {
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// ignore
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}
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}
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if (metadata == null) {
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List<String> match = new ArrayList<>(1);
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match.add(element);
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matches.add(match);
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} else {
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metadata.add(0, element);
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matches.add(metadata);
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}
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i++;
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} else {
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i++;
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}
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}
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return matches;
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}
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private static String decodeQuotedPrintable(CharSequence value, String charset) {
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int length = value.length();
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StringBuilder result = new StringBuilder(length);
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ByteArrayOutputStream fragmentBuffer = new ByteArrayOutputStream();
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for (int i = 0; i < length; i++) {
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char c = value.charAt(i);
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switch (c) {
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case '\r':
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case '\n':
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break;
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case '=':
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if (i < length - 2) {
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char nextChar = value.charAt(i + 1);
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if (nextChar != '\r' && nextChar != '\n') {
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char nextNextChar = value.charAt(i + 2);
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int firstDigit = parseHexDigit(nextChar);
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int secondDigit = parseHexDigit(nextNextChar);
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if (firstDigit >= 0 && secondDigit >= 0) {
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fragmentBuffer.write((firstDigit << 4) + secondDigit);
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} // else ignore it, assume it was incorrectly encoded
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i += 2;
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}
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}
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break;
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default:
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maybeAppendFragment(fragmentBuffer, charset, result);
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result.append(c);
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}
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}
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maybeAppendFragment(fragmentBuffer, charset, result);
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return result.toString();
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}
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private static void maybeAppendFragment(ByteArrayOutputStream fragmentBuffer,
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String charset,
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StringBuilder result) {
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if (fragmentBuffer.size() > 0) {
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byte[] fragmentBytes = fragmentBuffer.toByteArray();
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String fragment;
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if (charset == null) {
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fragment = new String(fragmentBytes, StandardCharsets.UTF_8);
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} else {
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try {
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fragment = new String(fragmentBytes, charset);
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} catch (UnsupportedEncodingException e) {
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fragment = new String(fragmentBytes, StandardCharsets.UTF_8);
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}
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}
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fragmentBuffer.reset();
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result.append(fragment);
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}
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}
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static List<String> matchSingleVCardPrefixedField(CharSequence prefix,
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String rawText,
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boolean trim,
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boolean parseFieldDivider) {
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List<List<String>> values = matchVCardPrefixedField(prefix, rawText, trim, parseFieldDivider);
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return values == null || values.isEmpty() ? null : values.get(0);
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}
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private static String toPrimaryValue(List<String> list) {
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return list == null || list.isEmpty() ? null : list.get(0);
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}
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private static String[] toPrimaryValues(Collection<List<String>> lists) {
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if (lists == null || lists.isEmpty()) {
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return null;
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}
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List<String> result = new ArrayList<>(lists.size());
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for (List<String> list : lists) {
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String value = list.get(0);
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if (value != null && !value.isEmpty()) {
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result.add(value);
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}
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}
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return result.toArray(EMPTY_STR_ARRAY);
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}
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private static String[] toTypes(Collection<List<String>> lists) {
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if (lists == null || lists.isEmpty()) {
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return null;
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}
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List<String> result = new ArrayList<>(lists.size());
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for (List<String> list : lists) {
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String value = list.get(0);
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if (value != null && !value.isEmpty()) {
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String type = null;
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for (int i = 1; i < list.size(); i++) {
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String metadatum = list.get(i);
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int equals = metadatum.indexOf('=');
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if (equals < 0) {
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// take the whole thing as a usable label
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type = metadatum;
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break;
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}
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if ("TYPE".equalsIgnoreCase(metadatum.substring(0, equals))) {
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type = metadatum.substring(equals + 1);
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break;
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}
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}
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result.add(type);
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}
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}
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return result.toArray(EMPTY_STR_ARRAY);
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}
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private static boolean isLikeVCardDate(CharSequence value) {
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return value == null || VCARD_LIKE_DATE.matcher(value).matches();
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}
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/**
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* Formats name fields of the form "Public;John;Q.;Reverend;III" into a form like
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* "Reverend John Q. Public III".
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*
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* @param names name values to format, in place
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*/
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private static void formatNames(Iterable<List<String>> names) {
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if (names != null) {
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for (List<String> list : names) {
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String name = list.get(0);
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String[] components = new String[5];
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int start = 0;
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int end;
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int componentIndex = 0;
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while (componentIndex < components.length - 1 && (end = name.indexOf(';', start)) >= 0) {
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components[componentIndex] = name.substring(start, end);
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componentIndex++;
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start = end + 1;
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}
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components[componentIndex] = name.substring(start);
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StringBuilder newName = new StringBuilder(100);
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maybeAppendComponent(components, 3, newName);
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maybeAppendComponent(components, 1, newName);
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maybeAppendComponent(components, 2, newName);
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maybeAppendComponent(components, 0, newName);
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maybeAppendComponent(components, 4, newName);
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list.set(0, newName.toString().trim());
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}
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}
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}
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private static void maybeAppendComponent(String[] components, int i, StringBuilder newName) {
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if (components[i] != null && !components[i].isEmpty()) {
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if (newName.length() > 0) {
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newName.append(' ');
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}
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newName.append(components[i]);
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}
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}
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}
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