private static FilterWordTypes AddFilterWord(
StringBuilder filterBuilder,
string filter,
int wordStart,
int nextWordStart,
FilterWordTypes wordType,
FilterWordTypes prevWordType,
List<string> filterableProperties)
{
string word = filter.Substring(wordStart, nextWordStart - wordStart);
if (wordType == FilterWordTypes.Other)
{
// Try to fix properties merged with other stuff
foreach (var property in filterableProperties)
{
int propIndex = word.IndexOf(property);
if (propIndex < 0)
continue;
if (propIndex > 0)
prevWordType = AddFilterWord(filterBuilder, word.Substring(0, propIndex), FilterWordTypes.Other, prevWordType);
prevWordType = AddFilterWord(filterBuilder, property, FilterWordTypes.Other, prevWordType);
int trailIndex = propIndex + property.Length;
if (trailIndex < word.Length)
prevWordType = AddFilterWord(filterBuilder, word.Substring(trailIndex), FilterWordTypes.Other, prevWordType);
return prevWordType;
}
}
return AddFilterWord(filterBuilder, word, wordType, prevWordType);
}
private static FilterWordTypes AddFilterWord(StringBuilder filterBuilder, string word, FilterWordTypes wordType, FilterWordTypes prevWordType)
{
if (wordType == FilterWordTypes.Other)
{
if (word.Equals("and", StringComparison.InvariantCultureIgnoreCase))
wordType = FilterWordTypes.Logical;
else if (word.Equals("or", StringComparison.InvariantCultureIgnoreCase))
wordType = FilterWordTypes.Logical;
else if (word.Equals("like", StringComparison.InvariantCultureIgnoreCase))
wordType = FilterWordTypes.Comparison;
else if (word.Equals("not", StringComparison.InvariantCultureIgnoreCase))
wordType = FilterWordTypes.Comparison;
}
// Not the first word or start/end of a group
if (prevWordType != FilterWordTypes.None && prevWordType != FilterWordTypes.OpenBracket && wordType != FilterWordTypes.CloseBracket)
{
filterBuilder.Append(' ');
// fix an issue in the BF2 main menu where filter expressions aren't joined properly
// i.e. "numplayers > 0gametype like '%gpm_cq%'"
// becomes "numplayers > 0 and gametype like '%gpm_cq%'"
if (wordType == FilterWordTypes.Other)
{
if (prevWordType != FilterWordTypes.Logical && prevWordType != FilterWordTypes.Comparison)
filterBuilder.Append("and ");
}
else if (wordType == FilterWordTypes.OpenBracket)
{
if (prevWordType == FilterWordTypes.Other || prevWordType == FilterWordTypes.String)
filterBuilder.Append("and ");
}
}
if (wordType == FilterWordTypes.String)
{
char quote = word[0];
filterBuilder.Append(quote);
if (word.Length > 2)
{
string strContent = word.Substring(1, word.Length - 2);
filterBuilder.Append(strContent.Replace(quote, '_')); // replace quote characters inside the string with a wildcard character
}
filterBuilder.Append(quote);
}
else
filterBuilder.Append(word);
return wordType;
}
private static FilterWordTypes AddFilterWord(StringBuilder filterBuilder, string word, FilterWordTypes wordType, FilterWordTypes prevWordType)
{
if (wordType == FilterWordTypes.Other)
{
if (word.Equals("and", StringComparison.InvariantCultureIgnoreCase))
wordType = FilterWordTypes.Logical;
else if (word.Equals("or", StringComparison.InvariantCultureIgnoreCase))
wordType = FilterWordTypes.Logical;
else if (word.Equals("like", StringComparison.InvariantCultureIgnoreCase))
wordType = FilterWordTypes.Comparison;
else if (word.Equals("not", StringComparison.InvariantCultureIgnoreCase))
wordType = FilterWordTypes.Comparison;
}
// Not the first word or start/end of a group
if (prevWordType != FilterWordTypes.None && prevWordType != FilterWordTypes.OpenBracket && wordType != FilterWordTypes.CloseBracket)
{
filterBuilder.Append(' ');
// fix an issue in the BF2 main menu where filter expressions aren't joined properly
// i.e. "numplayers > 0gametype like '%gpm_cq%'"
// becomes "numplayers > 0 and gametype like '%gpm_cq%'"
if (wordType == FilterWordTypes.Other)
{
if (prevWordType != FilterWordTypes.Logical && prevWordType != FilterWordTypes.Comparison)
filterBuilder.Append("and ");
} else if (wordType == FilterWordTypes.OpenBracket) {
if (prevWordType == FilterWordTypes.Other || prevWordType == FilterWordTypes.String)
filterBuilder.Append("and ");
}
}
if (wordType == FilterWordTypes.String)
{
char quote = word[0];
filterBuilder.Append(quote);
if (word.Length > 2)
{
string strContent = word.Substring(1, word.Length - 2);
filterBuilder.Append(strContent.Replace(quote, '_')); // replace quote characters inside the string with a wildcard character
}
filterBuilder.Append(quote);
}
else
filterBuilder.Append(word);
return wordType;
}
private static FilterWordTypes AddFilterWord(StringBuilder filterBuilder, string filter, int wordStart, int nextWordStart, FilterWordTypes wordType, FilterWordTypes prevWordType, List<string> filterableProperties)
{
string word = filter.Substring(wordStart, nextWordStart - wordStart);
if (wordType == FilterWordTypes.Other)
{
// Try to fix properties merged with other stuff
foreach(var property in filterableProperties)
{
int propIndex = word.IndexOf(property);
if (propIndex < 0)
continue;
if (propIndex > 0)
prevWordType = AddFilterWord(filterBuilder, word.Substring(0, propIndex), FilterWordTypes.Other, prevWordType);
prevWordType = AddFilterWord(filterBuilder, property, FilterWordTypes.Other, prevWordType);
int trailIndex = propIndex + property.Length;
if (trailIndex < word.Length)
prevWordType = AddFilterWord(filterBuilder, word.Substring(trailIndex), FilterWordTypes.Other, prevWordType);
return prevWordType;
}
}
return AddFilterWord(filterBuilder, word, wordType, prevWordType);
}
