public string Resolve(string stringToResolve, IEntityBase dataSource)
{
StringBuilder resolved = new StringBuilder();
int index = 0;
while (index != stringToResolve.Length - 1)
{
Match sequenceFound = controlSequenceFinder.Match(stringToResolve, index);
if (!sequenceFound.Success)
{
break;
}
resolved.Append(ResolveTemplateContent(stringToResolve.Substring(index, sequenceFound.Index - index)));
string controlSequence = sequenceFound.Groups["expression"].Value;
string startTag = $"$([{controlSequence}]";
string endTag = $"$([end-{controlSequence}])";
int length = sequenceFound.Length;
index = sequenceFound.Index;
int nestedSequences =
Count(stringToResolve.Substring(index + startTag.Length, length - startTag.Length), startTag);
int endIndex = index + length;
while (nestedSequences > 0)
{
int newEnd = stringToResolve.Substring(endIndex)
.IndexOf(endTag, StringComparison.OrdinalIgnoreCase);
if (newEnd < 0)
{
throw new ControlSequenceEndTagNotFoundException(controlSequence);
}
newEnd = endIndex + newEnd;
//Find nested tags between last end tag and this end tag
nestedSequences += Count(stringToResolve.Substring(endIndex, newEnd - endIndex), startTag);
nestedSequences--;
endIndex = newEnd + endTag.Length;
}
Match controlSequenceDataMatch = greedyContentFinder.Match(stringToResolve, index, endIndex - index);
if (!controlSequenceDataMatch.Success)
{
throw new InvalidOperationException("Should not happen");
}
resolved.Append(ResolveControlSequence(controlSequenceDataMatch.Groups["expression"].Value,
controlSequenceDataMatch.Groups["parameter"].Value,
controlSequenceDataMatch.Groups["content"].Value));
if (controlSequenceDataMatch.Value.Contains('\n'))
{
Match newlineMatch = newlineSearcher.Match(stringToResolve, endIndex);
if (newlineMatch.Success && newlineMatch.Index == endIndex)
{
endIndex += newlineMatch.Length;
}
}
index = endIndex;
}
resolved.Append(ResolveTemplateContent(stringToResolve.Substring(index)));
return(resolved.ToString());
string ResolveControlSequence(string sequence, string parameter, string content)
{
switch (sequence.ToUpperInvariant())
{
case "IF-EXIST":
return(IfSequence(IfExistCondition));
case "IF-SPECIFIED":
return(IfSequence(IfSpecifiedCondition));
case "FOREACH":
return(ForeachSequence());
case "NO-DUPLICATE-LINES":
return(RemoveDuplicateLinesSequence());
default:
throw new UnrecognizedControlSequenceException(sequence);
}
string RemoveDuplicateLinesSequence()
{
if (!string.IsNullOrEmpty(parameter))
{
throw new NoDuplicateLinesParameterMismatchException();
}
string[] lines = (Resolve(content, dataSource)).Split(new[] { '\r', '\n' },
StringSplitOptions.RemoveEmptyEntries);
return(string.Join(Environment.NewLine, lines.Distinct()) + Environment.NewLine);
}
string IfSequence(Func <bool> conditionCheck)
{
if (string.IsNullOrEmpty(parameter))
{
throw new IfSequenceParameterMismatchException();
}
bool condition = conditionCheck();
return(IfResult(condition));
}
bool IfExistCondition()
{
CommandDefinition definition = dataSource.Value <CommandDefinition>();
Argument argument = definition?.Argument <Argument>(parameter);
return(argument != null ||
dataSource.HasContent(parameter));
}
bool IfSpecifiedCondition()
{
CommandDefinition definition = dataSource.Value <CommandDefinition>();
Argument argument = definition?.Argument <Argument>(parameter);
bool specified;
if (argument != null)
{
specified = argument.IsDefined;
}
else
{
specified = dataSource.HasContent(parameter) &&
!string.IsNullOrEmpty(dataSource[parameter].Value <string>());
}
return(specified);
}
string IfResult(bool condition)
{
string result = string.Empty;
string[] elseSplit = content.Split(new[] { "$([else])" }, StringSplitOptions.RemoveEmptyEntries);
if (condition)
{
result = Resolve(elseSplit[0], dataSource);
}
else if (elseSplit.Length == 2)
{
result = Resolve(elseSplit[1], dataSource);
}
return(result);
}
string ForeachSequence()
{
StringBuilder foreachResult = new StringBuilder();
if ((content.StartsWith("\n", StringComparison.Ordinal) ||
content.StartsWith("\r\n", StringComparison.Ordinal)) &&
(content.EndsWith("\n", StringComparison.Ordinal) ||
content.EndsWith("\r\n", StringComparison.Ordinal)))
{
//This would leads to unwanted empty lines
content = content.TrimStart('\r').TrimStart('\n');
}
string[] nameSplit = parameter.Split(new[] { "[in]" }, StringSplitOptions.RemoveEmptyEntries);
if (nameSplit.Length != 2)
{
throw new ForeachSequenceParameterMismatchException(parameter);
}
string elementName = nameSplit[0].Trim();
string[] ofTypeSplit =
nameSplit[1].Split(new[] { "[of-type]" }, StringSplitOptions.RemoveEmptyEntries);
string splitPart = ofTypeSplit.Length == 2 ? ofTypeSplit[1] : ofTypeSplit[0];
string[] split = splitPart.Split(new[] { "[split]" }, StringSplitOptions.RemoveEmptyEntries);
string collection = ofTypeSplit.Length == 2 ? ofTypeSplit[0].Trim() : split[0].Trim();
string filter = string.Empty;
string splitSize = split.Length == 2 ? split[1].Trim() : string.Empty;
if (!int.TryParse(splitSize, out int chunksize))
{
chunksize = -1;
}
if (ofTypeSplit.Length == 2)
{
filter = split.Length == 2 ? split[0].Trim() : ofTypeSplit[1].Trim();
}
string[] path = collection.Split(new[] { '.' }, StringSplitOptions.RemoveEmptyEntries);
IEnumerable <Entity> data = ResolveRecursively(path);
if (!string.IsNullOrEmpty(filter))
{
data = data.Where(TemplateEqualsFilter);
}
ForeachItemContainer container = new ForeachItemContainer(elementName);
if (chunksize > 0)
{
var query = data.Select((entity, idx) => new { idx, entity });
IEnumerable <IEnumerable <Entity> > dataChunks = query.GroupBy(x => x.idx / chunksize, a => a.entity);
using (dataSource.AddTemporaryDataSource(container))
using (dataSource.SkipCaching(elementName))
{
foreach (IEnumerable <Entity> chunk in dataChunks)
{
using (dataSource.SkipCaching(EntityKeys.ChunkStartKey))
using (dataSource.SkipCaching(EntityKeys.ChunkEndKey))
{
string start = data.TakeWhile(x => !x.Equals(chunk.FirstOrDefault())).Count().ToString(CultureInfo.InvariantCulture);
string end = data.TakeWhile(x => !x.Equals(chunk.LastOrDefault())).Count().ToString(CultureInfo.InvariantCulture);
if (dataSource is Entity)
{
Entity dataSourceEntity = dataSource as Entity;
container.Current = dataSourceEntity.Create(Guid.NewGuid().ToByteString(), chunk);
using (container.Current.AddTemporaryDataSource(new DataChunk(start, end)))
foreachResult.Append(Resolve(content, dataSource));
}
else
{
throw new FormattableException($"The datasource should be an entity but is of type {dataSource.GetType()}");
}
}
}
}
}
else
{
using (dataSource.AddTemporaryDataSource(container))
using (dataSource.SkipCaching(elementName))
{
foreach (Entity entity in data)
{
container.Current = entity;
foreachResult.Append(Resolve(content, dataSource));
}
}
}
return(foreachResult.ToString());
bool TemplateEqualsFilter(Entity entity)
{
return(entity.Template().TemplateNames(repository)
.Any(n => n.Equals(filter, StringComparison.OrdinalIgnoreCase)));
}
}
}
string ResolveTemplateContent(string resolvable)
{
string result = resolvable;
Match controlSequenceMatch = templateAccessRegex.Match(resolvable);
while (controlSequenceMatch.Success)
{
string content = controlSequenceMatch.Groups["content"].Value;
if (content.StartsWith("[", StringComparison.Ordinal) &&
content.EndsWith("]", StringComparison.Ordinal))
{
throw new WildControlSequenceException(content);
}
string[] path = content.Split(new[] { '.' }, StringSplitOptions.RemoveEmptyEntries);
string value = (ResolveRecursively(path)).Value <string>();
if (controlSequenceMatch.Groups["text_control"].Success)
{
string textControlSequence = controlSequenceMatch.Groups["text_control"].Value;
textControlSequence = textControlSequence.Substring(0, textControlSequence.Length - 1);
value = ResolveTextControlSequences(value, textControlSequence);
}
result = result.Replace(controlSequenceMatch.Value, value);
controlSequenceMatch = controlSequenceMatch.NextMatch();
}
return(result);
}
IEntityBase ResolveRecursively(string[] path)
{
IEntityBase current = dataSource;
foreach (string part in path)
{
current = current[part];
if (current.HasValue <string>())
{
string value = Resolve(current.Value <string>(), current);
current.SetValue(value);
}
}
return(current);
}
int Count(string data, string substring)
{
return((data.Length - data.Replace(substring, string.Empty).Length) / substring.Length);
}
}
public virtual IDisposable AddTemporaryDataSource <T>(T dataSource)
{
return(entityBase.AddTemporaryDataSource(dataSource));
}