// TODO: Should add support to force commas or not, then just use newline as a text separator
#if !WINDOWS_UWP
/// <summary>
/// Parses the passed in file at the given file path, and returns a non-<c>null</c> <see cref="Json"/> instance.
/// </summary>
/// <param name="filePath">Path of the file to parse</param>
/// <param name="rules">Parser rules</param>
/// <returns>A non-<c>null</c> <see cref="Json"/> instance</returns>
public static Json ParseFile(string filePath, ParserRules rules = null)
{
if (PathHelpers.IsValidAsPath(filePath) && File.Exists(filePath))
{
return(ParseText(File.ReadAllText(filePath), rules));
}
else
{
Json jsonOutput = new Json(null);
jsonOutput.AddError($"File path '{filePath ?? "<null>"}' does not exist on disk, or is an invalid path!");
return(jsonOutput);
}
}
private static Json RunParse(TrackedStringManager tracker, ParserRules rules)
{
Json output = new Json(tracker);
try
{
if (tracker.Text == null)
{
output.AddError("Null source text provided!");
tracker.HasChanges = false;
return(output);
}
JsonTextIndexer indexer = new JsonTextIndexer(tracker.Text, rules);
// TODO: Handle case where root is document without braces( ie "item : value, item2 : value2")
int indexOfFirstOpenBracket = indexer.NextAny(0, '{', '[');
// ============ No Brackets ===========
if (indexOfFirstOpenBracket == -1)
{
output.Data = new JsonValue(output.TextTracking, 0, indexer.NextAny(0, '}', ']'), false);
tracker.HasChanges = false;
return(output);
}
// ============ Has Brackets ===========
char nextBracket = output.TextTracking.Text[indexOfFirstOpenBracket];
if (nextBracket == '{')
{
output.Data = new JsonDocument(indexer, output.TextTracking, indexOfFirstOpenBracket, out int endIndex);
tracker.HasChanges = false;
return(output);
}
else // if(nextBracket == '[')
{
output.Data = new JsonArray(indexer, output.TextTracking, indexOfFirstOpenBracket, out int endIndex);
tracker.HasChanges = false;
return(output);
}
}
catch (Exception exc)
{
output.AddError(exc.ToString());
}
return(output);
}
public JsonTextIndexer(string text, ParserRules rules = null)
{
rules = rules ?? new ParserRules();
foreach (char separator in rules.AdditionalSeparatorChars)
{
m_separatorIndexTracker.Add(separator, new List <int>());
}
var commentStartChars = new List <char>(rules.CommentIndicators.Select(c => c.Item1.First()));
bool isBetweenQuoteStartAndEnd = false;
string targetCommentEnd = null;
for (int currCharTargetIndex = 0; currCharTargetIndex < text.Length; ++currCharTargetIndex)
{
// If we're waiting for the end of a comment, then skip text until it's found
if (targetCommentEnd != null)
{
string subStr = text.Substring(currCharTargetIndex, targetCommentEnd.Length);
if (subStr == targetCommentEnd)
{
currCharTargetIndex += targetCommentEnd.Length - 1;
targetCommentEnd = null;
}
continue;
}
char charInQuestion = text[currCharTargetIndex];
// If we've started looking for a quote, skip text until end quote is found
if (isBetweenQuoteStartAndEnd)
{
if (charInQuestion == QuoteChar)
{
isBetweenQuoteStartAndEnd = false;
_StoreFoundSeparators(currCharTargetIndex, QuoteChar, m_separatorIndexTracker[QuoteChar]);
}
}
else
{
// First, look for comments, if we're starting one of those that superceeds everything else
for (int index = 0; index < commentStartChars.Count; ++index)
{
char commentStart = commentStartChars[index];
if (charInQuestion == commentStart)
{
string commentStr = rules.CommentIndicators[index].Item1;
string subStr = text.Substring(currCharTargetIndex, commentStr.Length);
if (subStr == commentStr)
{
targetCommentEnd = rules.CommentIndicators[index].Item2;
break;
}
}
}
// Second look for separators, that's the main goal!
if (targetCommentEnd == null)
{
foreach (var kvp in m_separatorIndexTracker)
{
if (kvp.Key == charInQuestion)
{
// Additionally, keep track of the separator is a quote, because in that case we need to ignore
// everything until the end quote, so we need to go into quote searching mode.
if (kvp.Key == QuoteChar)
{
isBetweenQuoteStartAndEnd = true;
}
_StoreFoundSeparators(currCharTargetIndex, charInQuestion, kvp.Value);
break;
}
}
}
}
}
// Note: We're looping in order, thus all of our add calls will be putting items in index order
// without having to do binary searches so we'll just call add
void _StoreFoundSeparators(int _characterIndex, char _separator, List <int> _separatorIndexTracker)
{
m_separatorOccurenceTracker.Add(new FoundSeparator(_characterIndex, _separator));
_separatorIndexTracker.Add(_characterIndex);
}
}
/// <summary>
/// Parses the text from the passed in <see cref="TrackedStringManager"/>, and returns a non-<c>null</c> <see cref="Json"/> instance.
/// </summary>
/// <param name="jsonText">Some json text.</param>
/// <param name="rules">Parser rules</param>
/// <returns>A non-<c>null</c> <see cref="Json"/> instance</returns>
public static Json ParseText(TrackedStringManager source, ParserRules rules = null)
{
return(RunParse(source, rules));
}
/// <summary>
/// Parses the passed in text, and returns a non-<c>null</c> <see cref="Json"/> instance.
/// </summary>
/// <param name="jsonText">Some json text.</param>
/// <param name="rules">Parser rules</param>
/// <returns>A non-<c>null</c> <see cref="Json"/> instance</returns>
public static Json ParseText(string jsonText, ParserRules rules = null)
{
return(RunParse(new TrackedStringManager(jsonText), rules));
}
/// <summary>
/// Parses the text from an existing <see cref="FileTextTracker"/> file, and returns a non-<c>null</c> <see cref="Json"/> instance.
/// </summary>
/// <param name="file">A pre-made <see cref="FileTextTracker"/> to parse the contents of. Note: Will act as the returned <see cref="Json"/> instnace's TextTracking.</param>
/// <param name="rules">Parser rules</param>
/// <returns>A non-<c>null</c> <see cref="Json"/> instance</returns>
public static Json ParseFile(FileTextTracker file, ParserRules rules = null)
{
return(RunParse(file, rules));
}
