/// <summary>
/// Parses the given search query from its raw representation.
/// </summary>
/// <param name="query">Raw query.</param>
/// <returns>Search query.</returns>
public static SearchQuery Parse(string query)
{
Match m = null;
Criterion c = null;
SearchQuery ret = null;
string currentQuery = query;
if (!string.IsNullOrEmpty(currentQuery))
{
ret = new SearchQuery();
while((m = Regex.Match(currentQuery, "([a-zA-Z0-9]+):((\"[^\"]+\")|([^\\s]+))", RegexOptions.IgnoreCase)).Success)
{
c = new Criterion();
c.Name = m.Groups[1].Value;
c.Value = (m.Groups[2].Value ?? string.Empty).Trim().Trim('\"');
if(!string.IsNullOrEmpty(c.Value))
ret.Criteria.Add(c);
currentQuery = currentQuery.Remove(m.Index, m.Length);
}
currentQuery = currentQuery.Trim();
if (!string.IsNullOrEmpty(currentQuery))
ret.Criteria.Add(new Criterion(string.Empty, currentQuery));
}
return ret;
}
/// <summary>
/// Removes criterion with the given name.
/// </summary>
/// <param name="name">Criterion name.</param>
/// <returns>New search query.</returns>
public SearchQuery WithoutCriterion(string name)
{
int index = -1;
SearchQuery ret = new SearchQuery(Criteria);
if (name != null && ret.Criteria != null)
{
for (int i = 0; i < ret.Criteria.Count; i++)
{
if (ret.Criteria[i] != null && string.Compare(ret.Criteria[i].Name ?? string.Empty, name, System.StringComparison.InvariantCultureIgnoreCase) == 0)
{
index = i;
break;
}
}
if (index >= 0)
ret.Criteria.RemoveAt(index);
}
return ret;
}
/// <summary>
/// Adds or updates criterion with the given name.
/// </summary>
/// <param name="name">Criterion name.</param>
/// <param name="value">Criterion value.</param>
/// <returns>New search query.</returns>
public SearchQuery WithCriterion(string name, string value)
{
int index = -1;
SearchQuery ret = new SearchQuery(Criteria);
if (name != null && !string.IsNullOrEmpty(value))
{
if (ret.Criteria == null)
ret.Criteria = new List<Criterion>();
for (int i = 0; i < ret.Criteria.Count; i++)
{
if (ret.Criteria[i] != null && string.Compare(ret.Criteria[i].Name ?? string.Empty, name, System.StringComparison.InvariantCultureIgnoreCase) == 0)
{
index = i;
break;
}
}
if (index < 0)
ret.Criteria.Add(new Criterion(name, value));
else
ret.Criteria[index].Value = value;
}
return ret;
}