/// <summary>
/// Asynchronously reads source server information.
/// </summary>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>
/// A <see cref="Task"/> that represents the asynchronous read operation.
/// </returns>
public async Task ReadSourceServerInformationAsync(CancellationToken cancellationToken)
{
const string sourceFiles = "/src/files/";
const int sourceFilesLength = 11;
if (_file.StreamExists("srcsrv"))
SourceInformation = await SrcSrvParser.ParseAsync(_file, cancellationToken);
if (SourceInformation == null)
{
SourceInformation = new SourceInformationCollection();
foreach (var item in _file.StreamNames.Where(x => x.StartsWith(sourceFiles)))
{
SourceInformation.Add(new Symbols.SourceInformation(item.Substring(sourceFilesLength)));
}
}
}
public void Rollback(SourceInformationCollection allSourceInformation)
{
this.PreRemoveSearchResults(false);
this.RemoveSearchResults();
}
public void CheckInitialStatus(SourceInformationCollection allSourceInformation, OperationStatus status)
{
}
public static async Task<SourceInformationCollection> ParseAsync(TextReader reader, CancellationToken cancellationToken)
{
const int State_Start = 0;
const int State_Ini = 1;
const int State_Vars = 2;
const int State_Files = 3;
var vars = new Dictionary<string, SrcSrvExpression>(StringComparer.OrdinalIgnoreCase);
var lineVars = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
var result = new SourceInformationCollection();
var state = State_Start;
string line;
while ((line = await reader.ReadLineAsync()) != null)
{
cancellationToken.ThrowIfCancellationRequested();
switch (state)
{
case State_Start:
if (line.StartsWith("SRCSRV: ini"))
state = State_Ini;
break;
case State_Ini:
if (line.StartsWith("SRCSRV: variables"))
state = State_Vars;
break;
case State_Vars:
if (line.StartsWith("SRCSRV: source files"))
{
if (!vars.ContainsKey("SRCSRVTRG")) return null;
state = State_Files;
}
else
{
var index = line.IndexOf('=');
if (index > 0)
{
var var = ParseVariable(line.Substring(index + 1));
if (var == null) return null;
vars.Add(line.Substring(0, index), var);
}
}
break;
case State_Files:
var split = line.Split('*');
if (!string.IsNullOrWhiteSpace(line) && split.Length > 0)
{
lineVars.Clear();
for (var i = 0; i < split.Length; i++)
lineVars[string.Format(CultureInfo.InvariantCulture, "VAR{0}", i + 1)] = split[i];
var trg = vars["SRCSRVTRG"].Evaluate(vars, lineVars);
result.Add(new SourceInformation(split[0], trg));
}
break;
}
}
return result;
}
