public override Table VisitOrder_item(QueryParser.Order_itemContext context)
{
int Comparer(TableRow row1, TableRow row2)
{
var env1 = new Environment(row1, _table.Columns);
var expr1 = new CondExprVisitor(_zmi, env1).Visit(context.cond_expr());
var env2 = new Environment(row2, _table.Columns);
var expr2 = new CondExprVisitor(_zmi, env2).Visit(context.cond_expr());
var result = expr1.Zip(expr2).Bind(p =>
{
var res = new NullsVisitor(p).VisitNulls(context.nulls());
if (res == 0)
return new OrderVisitor(p).VisitOrder(context.order()).Just();
return res.Just();
});
return result.Match(i => i, () => 0);
}
_table.Sort(Compare.By<TableRow>(Comparer));
return _table;
}
internal static Dictionary <string, string> FindAssetPathsForLineIDs(IEnumerable <string> lineIDs, string assetsFolderPath)
{
// Find _all_ files in this director that are not .meta files
var allFiles = Directory.EnumerateFiles(assetsFolderPath, "*", SearchOption.AllDirectories)
.Where(path => path.EndsWith(".meta") == false);
// Match files with those whose filenames contain a line ID
var matchedFilesAndPaths = lineIDs.GroupJoin(
// the elements we're matching lineIDs to
allFiles,
// the key for lineIDs (being strings, it's just the line
// ID itself)
lineID => lineID,
// the key for assets (the filename without the path)
assetPath => Path.GetFileName(assetPath),
// the way we produce the result (a key-value pair)
(lineID, assetPaths) =>
{
if (assetPaths.Count() > 1)
{
Debug.LogWarning($"Line {lineID} has {assetPaths.Count()} possible assets.\n{string.Join(", ", assetPaths)}");
}
return(new { lineID, assetPaths });
},
// the way we test to see if two elements should be joined
// (does the filename contain the line ID?)
Compare.By <string>((fileName, lineID) =>
{
var lineIDWithoutPrefix = lineID.Replace("line:", "");
return(Path.GetFileNameWithoutExtension(fileName).Equals(lineIDWithoutPrefix));
})
)
// Discard any pair where no asset was found
.Where(pair => pair.assetPaths.Count() > 0)
.ToDictionary(entry => entry.lineID, entry => entry.assetPaths.FirstOrDefault());
return(matchedFilesAndPaths);
}
public static IEnumerable <T> DistinctBy <T, TIdentity>(this IEnumerable <T> source, Func <T, TIdentity> identitySelector)
{
return(source.Distinct(Compare.By(identitySelector)));
}