/// <summary>
/// Query the freedb server to see if there is information on this cd
/// </summary>
/// <param name="querystring"></param>
/// <param name="queryResult"></param>
/// <param name="queryResultsColl"></param>
/// <returns></returns>
public List<QueryResult> Query(string querystring)
{
List<string> coll = null;
StringBuilder builder = new StringBuilder(FreedbHelper.Commands.CMD_QUERY);
builder.Append("+");
builder.Append(querystring);
//make call
try
{
coll = Call(builder.ToString());
}
catch (Exception ex)
{
string msg = "Unable to perform cddb query.";
Exception newex = new Exception(msg, ex);
throw newex;
}
// check if results came back
if (coll.Count == 0)
{
string msg = "No results returned from cddb query.";
Exception ex = new Exception(msg, null);
throw ex;
}
string code = GetCode(coll[0]);
if (code == ResponseCodes.CODE_INVALID)
{
string msg = "Unable to process results returned for query: Data returned: " + coll[0];
Exception ex = new Exception(msg, null);
throw ex;
}
switch (code)
{
case ResponseCodes.CODE_500:
case ResponseCodes.CODE_202:
//Database entry is corrupt
case ResponseCodes.CODE_403:
//no handshake
case ResponseCodes.CODE_409:
return null;
// Multiple results were returned
// Put them into a queryResultCollection object
case ResponseCodes.CODE_211:
case ResponseCodes.CODE_210:
{
List<QueryResult> queryResults = new List<QueryResult>();
//remove the 210 or 211
coll.RemoveAt(0);
foreach (string line in coll)
{
QueryResult result = new QueryResult(line, true);
queryResults.Add(result);
}
return queryResults;
}
// exact match
case ResponseCodes.CODE_200:
{
List<QueryResult> queryResults = new List<QueryResult>();
queryResults.Add(new QueryResult(coll[0]));
return queryResults;
}
//not found
default:
return null;
} // end of switch
}
///// <summary>
///// Retrieve all Freedb servers from the main server site
///// </summary>
///// <param name="sites">SiteCollection that is populated with the site information</param>
///// <returns>Response Code</returns>
//public List<Site> GetSites()
//{
// return GetSites(Site.PROTOCOLS.ALL);
//}
#endregion
///// <summary>
///// Get the Freedb sites
///// </summary>
///// <param name="protocol"></param>
///// <param name="sites">SiteCollection that is populated with the site information</param>
///// <returns>Response Code</returns>
/////
//public List<Site> GetSites(string protocol )
//{
// if (protocol != Site.PROTOCOLS.CDDBP && protocol != Site.PROTOCOLS.HTTP)
// protocol = Site.PROTOCOLS.ALL;
// List<string> coll;
// try
// {
// coll= Call(Commands.CMD_SITES,m_mainSite.GetUrl());
// }
// catch (Exception ex)
// {
// Debug.WriteLine("Error retrieving Sites." + ex.Message);
// throw new Exception("FreedbHelper.GetSites: Error retrieving Sites.", ex);
// }
// // check if results came back
// if (coll.Count < 0)
// {
// string msg = "No results returned from sites request.";
// throw new Exception(msg,null);
// }
// string code = GetCode(coll[0]);
// if (code == ResponseCodes.CODE_INVALID)
// {
// string msg = "Unable to process results Sites Request. Returned Data: " + coll[0];
// throw new Exception(msg,null);
// }
// switch (code)
// {
// case ResponseCodes.CODE_500:
// case ResponseCodes.CODE_401:
// return null;
// case ResponseCodes.CODE_210:
// {
// coll.RemoveAt(0);
// List<Site> sites = new List<Site>();
// foreach (String line in coll)
// {
// Debug.WriteLine("line: " + line);
// Site site = new Site(line);
// if (protocol == Site.PROTOCOLS.ALL)
// sites.Add(new Site(line));
// else if (site.Protocol == protocol)
// sites.Add(new Site(line));
// }
// return sites;
// }
// default:
// return null;
// }
//}
/// <summary>
/// Read Entry from the database.
/// </summary>
/// <param name="qr">A QueryResult object that is created by performing a query</param>
/// <param name="cdEntry">out parameter - CDEntry object</param>
/// <returns></returns>
//public CDEntry Read(QueryResult qr)
//{
// Debug.Assert(qr != null);
// List<string> coll = null;
// StringBuilder builder = new StringBuilder(FreedbHelper.Commands.CMD_READ);
// builder.Append("+");
// builder.Append(qr.Category);
// builder.Append("+");
// builder.Append(qr.Discid);
// //make call
// try
// {
// coll = Call(builder.ToString());
// }
// catch (Exception ex)
// {
// string msg = "Error performing cddb read.";
// throw new Exception(msg,ex);
// }
// // check if results came back
// if (coll.Count < 0)
// {
// string msg = "No results returned from cddb read.";
// throw new Exception(msg,null);
// }
// string code = GetCode(coll[0]);
// if (code == ResponseCodes.CODE_INVALID)
// {
// string msg = "Unable to process results for cddb read. Returned Data: " + coll[0];
// throw new Exception(msg,null);
// }
// switch (code)
// {
// case ResponseCodes.CODE_500: // query problem
// case ResponseCodes.CODE_401: // entry not found
// case ResponseCodes.CODE_402: // server error
// case ResponseCodes.CODE_403: // Database entry is corrupt
// case ResponseCodes.CODE_409: // No handshake
// return null;
// case ResponseCodes.CODE_210: // good
// {
// coll.RemoveAt(0); // remove the 210
// return new CDEntry(coll);
// }
// default:
// return null;
// }
//}
/// <summary>
/// Read Entry from the database.
/// </summary>
/// <param name="qr">A QueryResult object that is created by performing a query</param>
/// <param name="cdEntry">out parameter - CDEntry object</param>
/// <returns></returns>
internal AlbumDescriptor ConvertToAlbumDescriptor(QueryResult qr, IInternetServiceListener listener)
{
Debug.Assert(qr != null);
List<string> coll = null;
StringBuilder builder = new StringBuilder(FreedbHelper.Commands.CMD_READ);
builder.Append("+");
builder.Append(qr.Category);
builder.Append("+");
builder.Append(qr.Discid);
//make call
try
{
coll = Call(builder.ToString());
}
catch (WebException ex)
{
if (listener != null)
listener.OnWebExeption(ex);
return null;
}
catch (Exception)
{
return null;
}
// check if results came back
if (coll.Count == 0)
{
return null;
}
string code = GetCode(coll[0]);
if (code == ResponseCodes.CODE_INVALID)
{
if (listener != null)
listener.OnUnExpectedUnreadableResult("Unable to process results for cddb read.");
return null;
}
switch (code)
{
case ResponseCodes.CODE_500: // query problem
case ResponseCodes.CODE_401: // entry not found
case ResponseCodes.CODE_402: // server error
case ResponseCodes.CODE_403: // Database entry is corrupt
case ResponseCodes.CODE_409: // No handshake
return null;
case ResponseCodes.CODE_210: // good
{
coll.RemoveAt(0); // remove the 210
return AlbumDescriptor.FromFreeDBInfo(coll);
}
default:
if (listener != null)
listener.OnStatusCodeKO();
return null;
}
}
