using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;
using com.google.zxing.common;
/*
* Copyright 2008 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace com.google.zxing.client.result
{
using Result = com.google.zxing.Result;
/// <summary>
/// Parses contact information formatted according to the VCard (2.1) format. This is not a complete
/// implementation but should parse information as commonly encoded in 2D barcodes.
///
/// @author Sean Owen
/// </summary>
public sealed class VCardResultParser : ResultParser
{
private static readonly string BEGIN_VCARD = "BEGIN:VCARD";
private static readonly string VCARD_LIKE_DATE = "\\d{4}-?\\d{2}-?\\d{2}";
private static readonly string CR_LF_SPACE_TAB = "\r\n[ \t]";
private static readonly string NEWLINE_ESCAPE = "\\\\[nN]";
private static readonly string VCARD_ESCAPES = "\\\\([,;\\\\])";
private static readonly string EQUALS = "=";
private static readonly string SEMICOLON = ";";
private static readonly string UNESCAPED_SEMICOLONS = "(?<!\\\\);+";
public override ParsedResult parse(Result result)
{
// Although we should insist on the raw text ending with "END:VCARD", there's no reason
// to throw out everything else we parsed just because this was omitted. In fact, Eclair
// is doing just that, and we can't parse its contacts without this leniency.
string rawText = getMassagedText(result);
Match m = Regex.Match(rawText, BEGIN_VCARD, RegexOptions.IgnoreCase);
if (!m.Success || m.Index != 0)
{
return null;
}
IList<IList<string>> names = matchVCardPrefixedField("FN", rawText, true, false);
if (names == null)
{
// If no display names found, look for regular name fields and format them
names = matchVCardPrefixedField("N", rawText, true, false);
formatNames(names);
}
IList<IList<string>> phoneNumbers = matchVCardPrefixedField("TEL", rawText, true, false);
IList<IList<string>> emails = matchVCardPrefixedField("EMAIL", rawText, true, false);
IList<string> note = matchSingleVCardPrefixedField("NOTE", rawText, false, false);
IList<IList<string>> addresses = matchVCardPrefixedField("ADR", rawText, true, true);
IList<string> org = matchSingleVCardPrefixedField("ORG", rawText, true, true);
IList<string> birthday = matchSingleVCardPrefixedField("BDAY", rawText, true, false);
if (birthday != null && !isLikeVCardDate(birthday[0]))
{
birthday = null;
}
IList<string> title = matchSingleVCardPrefixedField("TITLE", rawText, true, false);
IList<string> url = matchSingleVCardPrefixedField("URL", rawText, true, false);
IList<string> instantMessenger = matchSingleVCardPrefixedField("IMPP", rawText, true, false);
return new AddressBookParsedResult(toPrimaryValues(names), null, toPrimaryValues(phoneNumbers), toTypes(phoneNumbers), toPrimaryValues(emails), toTypes(emails), toPrimaryValue(instantMessenger), toPrimaryValue(note), toPrimaryValues(addresses), toTypes(addresses), toPrimaryValue(org), toPrimaryValue(birthday), toPrimaryValue(title), toPrimaryValue(url));
}
internal static IList<IList<string>> matchVCardPrefixedField(string prefix, string rawText, bool trim, bool parseFieldDivider)
{
IList<IList<string>> matches = null;
int i = 0;
int max = rawText.Length;
while (i < max)
{
// At start or after newline, match prefix, followed by optional metadata
// (led by ;) ultimately ending in colon
//Matcher matcher = Pattern.compile("(?:^|\n)" + prefix + "(?:;([^:]*))?:", Pattern.CASE_INSENSITIVE).matcher(rawText);
Regex matcher = new Regex("(?:^|\n)" + prefix + "(?:;([^:]*))?:", RegexOptions.IgnoreCase);
//(rawText);
if (i > 0)
{
i--; // Find from i-1 not i since looking at the preceding character
}
//if (!matcher.find(i))
Match match = matcher.Match(rawText);
if (!match.Success)
{
break;
}
//i = matcher.end(0); // group 0 = whole pattern; end(0) is past final colon
i = match.Groups[0].Index + match.Groups[0].Length; // group 0 = whole pattern; end(0) is past final colon
string metadataString = match.Groups[1].Value; // group 1 = metadata substring
IList<string> metadata = null;
bool quotedPrintable = false;
string quotedPrintableCharset = null;
if (metadataString != null)
{
foreach (string metadatum in SEMICOLON.Split(new string[] {metadataString},StringSplitOptions.None))
{
if (metadata == null)
{
metadata = new List<string>(1);
}
metadata.Add(metadatum);
//string[] metadatumTokens = EQUALS.Split(metadatum, 2);
string[] metadatumTokens = EQUALS.Split(new string[] {metadatum},2,StringSplitOptions.None);
if (metadatumTokens.Length > 1)
{
string key = metadatumTokens[0];
string value = metadatumTokens[1];
if ("ENCODING"== key.ToUpper() && "QUOTED-PRINTABLE"==value.ToUpper())
{
quotedPrintable = true;
}
else if ("CHARSET" == key.ToUpper())
{
quotedPrintableCharset = value;
}
}
}
}
int matchStart = i; // Found the start of a match here
while ((i =(int) rawText.IndexOf( '\n', i)) >= 0) // Really, end in \r\n
{
if (i < rawText.Length - 1 && (rawText[i + 1] == ' ' || rawText[i + 1] == '\t')) // this is only a continuation - But if followed by tab or space,
{
i += 2; // Skip \n and continutation whitespace
} // If preceded by = in quoted printable
else if (quotedPrintable && ((i >= 1 && rawText[i - 1] == '=') || (i >= 2 && rawText[i - 2] == '='))) // this is a continuation
{
i++; // Skip \n
}
else
{
break;
}
}
if (i < 0)
{
// No terminating end character? uh, done. Set i such that loop terminates and break
i = max;
}
else if (i > matchStart)
{
// found a match
if (matches == null)
{
matches = new List<IList<string>>(1); // lazy init
}
if (i >= 1 && rawText[i - 1] == '\r')
{
i--; // Back up over \r, which really should be there
}
string element = rawText.Substring(matchStart, i - matchStart);
if (trim)
{
element = element.Trim();
}
if (quotedPrintable)
{
element = decodeQuotedPrintable(element, quotedPrintableCharset);
if (parseFieldDivider)
{
//element = UNESCAPED_SEMICOLONS.matcher(element).replaceAll("\n").Trim();
element = new Regex(UNESCAPED_SEMICOLONS).Replace(element,("\n")).Trim();
}
}
else
{
if (parseFieldDivider)
{
//element = UNESCAPED_SEMICOLONS.matcher(element).replaceAll("\n").Trim();
element = new Regex(UNESCAPED_SEMICOLONS).Replace(element,"\n").Trim();
}
//element = CR_LF_SPACE_TAB.matcher(element).replaceAll("");
element = new Regex(CR_LF_SPACE_TAB).Replace(element,"");
//element = NEWLINE_ESCAPE.matcher(element).replaceAll("\n");
element = new Regex(NEWLINE_ESCAPE).Replace(element,"\n");
//element = VCARD_ESCAPES.matcher(element).replaceAll("$1");
element = new Regex(VCARD_ESCAPES).Replace(element,"$1");
}
if (metadata == null)
{
IList<string> matchList = new List<string>(1);
matchList.Add(element);
matches.Add(matchList);
}
else
{
metadata.Insert(0, element);
matches.Add(metadata);
}
i++;
}
else
{
i++;
}
}
return matches;
}
private static string decodeQuotedPrintable(string value, string charset)
{
int length = value.Length;
StringBuilder result = new StringBuilder(length);
MemoryStream fragmentBuffer = new MemoryStream();
for (int i = 0; i < length; i++)
{
char c = value[i];
switch (c)
{
case '\r':
case '\n':
break;
case '=':
if (i < length - 2)
{
char nextChar = value[i + 1];
if (nextChar != '\r' && nextChar != '\n')
{
char nextNextChar = value[i + 2];
int firstDigit = parseHexDigit(nextChar);
int secondDigit = parseHexDigit(nextNextChar);
if (firstDigit >= 0 && secondDigit >= 0)
{
fragmentBuffer.WriteByte((byte)((firstDigit << 4) + secondDigit));
} // else ignore it, assume it was incorrectly encoded
i += 2;
}
}
break;
default:
maybeAppendFragment(fragmentBuffer, charset, result);
result.Append(c);
break;
}
}
maybeAppendFragment(fragmentBuffer, charset, result);
return result.ToString();
}
private static void maybeAppendFragment(MemoryStream fragmentBuffer, string charset, StringBuilder result)
{
Encoding en = Encoding.GetEncoding(charset);
Encoding enFallback = Encoding.UTF8;
if (fragmentBuffer.Length > 0)
{
sbyte[] fragmentBytes = fragmentBuffer.ToArray().ToSBytes();
string fragment;
if (charset == null)
{
fragment = en.GetString((byte[])(Array)fragmentBytes); ;
}
else
{
try
{
fragment = en.GetString((byte[])(Array)fragmentBytes); ;
}
catch (ArgumentException e)
{
// Yikes, well try anyway:
//fragment = new string(fragmentBytes);
fragment = enFallback.GetString((byte[]) (Array) fragmentBytes);
}
}
fragmentBuffer.Position=0;
result.Append(fragment);
}
}
internal static IList<string> matchSingleVCardPrefixedField(string prefix, string rawText, bool trim, bool parseFieldDivider)
{
IList<IList<string>> values = matchVCardPrefixedField(prefix, rawText, trim, parseFieldDivider);
return values == null || values.Count == 0 ? null : values[0];
}
private static string toPrimaryValue(IList<string> list)
{
return list == null || list.Count == 0 ? null : list[0];
}
private static string[] toPrimaryValues(ICollection<IList<string>> lists)
{
if (lists == null || lists.Count == 0)
{
return null;
}
List<string> result = new List<string>(lists.Count);
foreach (IList<string> list in lists)
{
result.Add(list[0]);
}
return result.ToArray();
}
private static string[] toTypes(ICollection<IList<string>> lists)
{
if (lists == null || lists.Count == 0)
{
return null;
}
List<string> result = new List<string>(lists.Count);
foreach (IList<string> list in lists)
{
string type = null;
for (int i = 1; i < list.Count; i++)
{
string metadatum = list[i];
int equals = metadatum.IndexOf('=');
if (equals < 0)
{
// take the whole thing as a usable label
type = metadatum;
break;
}
if ("TYPE" == (metadatum.Substring(0, equals)).ToUpper())
{
type = metadatum.Substring(equals + 1);
break;
}
}
result.Add(type);
}
return result.ToArray();
}
private static bool isLikeVCardDate(string value)
{
//return value == null || VCARD_LIKE_DATE.matcher(value).matches();
return value == null || new Regex(VCARD_LIKE_DATE).IsMatch(value);
}
/// <summary>
/// Formats name fields of the form "Public;John;Q.;Reverend;III" into a form like
/// "Reverend John Q. Public III".
/// </summary>
/// <param name="names"> name values to format, in place </param>
private static void formatNames(IEnumerable<IList<string>> names)
{
if (names != null)
{
foreach (IList<string> list in names)
{
string name = list[0];
string[] components = new string[5];
int start = 0;
int end;
int componentIndex = 0;
while (componentIndex < components.Length - 1 && (end = name.IndexOf(';', start)) > 0)
{
components[componentIndex] = name.Substring(start, end - start);
componentIndex++;
start = end + 1;
}
components[componentIndex] = name.Substring(start);
StringBuilder newName = new StringBuilder(100);
maybeAppendComponent(components, 3, newName);
maybeAppendComponent(components, 1, newName);
maybeAppendComponent(components, 2, newName);
maybeAppendComponent(components, 0, newName);
maybeAppendComponent(components, 4, newName);
list[0] = newName.ToString().Trim();
}
}
}
private static void maybeAppendComponent(string[] components, int i, StringBuilder newName)
{
if (components[i] != null)
{
newName.Append(' ');
newName.Append(components[i]);
}
}
}
}