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using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Xml;
namespace BloggerToDasBlog.Console {
public sealed class BloggerReader {
#region Constructors
private BloggerReader( ) {}
#endregion
#region Public Methods
public static IList< IBloggerEntry > Read( Uri filePath ) {
XmlDocument document = new XmlDocument( );
document.LoadXml( File.ReadAllText( filePath.LocalPath ) );
XmlNodeReader reader = new XmlNodeReader( document );
reader.MoveToContent( );
IList< IBloggerEntry > results = new List< IBloggerEntry >( );
if ( reader.Read( ) ) {
if ( reader.NodeType == XmlNodeType.Element ) {
if ( String.Compare( reader.LocalName, BloggerEntryXmlElement.Root, true, CultureInfo.InvariantCulture ) == 0 ) {
String entryNode;
while ( !String.IsNullOrEmpty( entryNode = reader.ReadOuterXml( ) ) ) {
IBloggerEntry entry = ParseSingle( entryNode );
if ( null != entry ) {
results.Add( entry );
}
}
return results;
}
}
}
return null;
}
#endregion
#region Private Methods
private static IBloggerEntry ParseSingle( String resultXmlRecord ) {
if ( String.IsNullOrEmpty( resultXmlRecord ) ) {
return null;
}
XmlDocument document = new XmlDocument( );
document.LoadXml( resultXmlRecord );
XmlNodeReader reader = new XmlNodeReader( document );
IBloggerEntry entry = new BloggerEntry( );
reader.MoveToContent( );
try {
while ( reader.Read( ) ) {
if ( reader.NodeType == XmlNodeType.Element ) {
switch ( reader.LocalName.ToLower( CultureInfo.InvariantCulture ) ) {
case BloggerEntryXmlElement.Title:
entry.Title = reader.ReadString( );
break;
case BloggerEntryXmlElement.Body:
entry.Body = reader.ReadString( );
break;
case BloggerEntryXmlElement.Author:
entry.Author = reader.ReadString( );
break;
case BloggerEntryXmlElement.Date:
DateTime dateTime;
entry.Date = DateTime.TryParse( reader.ReadString( ), out dateTime ) ? dateTime : DateTime.MinValue;
break;
case BloggerCommentXmlElement.Root:
String commentNode = reader.ReadOuterXml( );
if ( !String.IsNullOrEmpty( commentNode ) ) {
entry.Comments.Add( ParseComment( commentNode ) );
}
break;
}
}
}
return entry;
}
catch ( FormatException ) {
return null;
}
}
private static IBloggerComment ParseComment( string xml ) {
if ( String.IsNullOrEmpty( xml ) ) {
return null;
}
IBloggerComment comment = new BloggerComment( );
XmlDocument document = new XmlDocument( );
document.LoadXml( xml );
XmlNodeReader reader = new XmlNodeReader( document );
reader.MoveToContent( );
while ( reader.Read( ) ) {
if ( reader.NodeType == XmlNodeType.Element ) {
switch ( reader.LocalName ) {
case BloggerCommentXmlElement.Author:
comment.Author = reader.ReadString( );
break;
case BloggerCommentXmlElement.Date:
DateTime dateTime;
comment.Date = DateTime.TryParse( reader.ReadString( ), out dateTime ) ? dateTime : DateTime.MinValue;
break;
case BloggerCommentXmlElement.Body:
comment.Body = reader.ReadString( );
break;
}
}
}
return comment;
}
#endregion
}
}
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