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SQLLinter/Common/FixHelpers.cs

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+using Microsoft.SqlServer.TransactSql.ScriptDom;
+using System.Text.RegularExpressions;
+
+namespace SQLLinter.Common.Helpers;
+
+public static class FixHelpers
+{
+    public class FindViolatingNodeVisitor<T> : TSqlFragmentVisitor where T : TSqlFragment
+    {
+        private readonly Func<T, bool> Where;
+
+        public List<T> Nodes = new List<T>();
+
+        public FindViolatingNodeVisitor(Func<T, bool> where = null)
+        {
+            Where = where;
+        }
+
+        public override void Visit(TSqlFragment node)
+        {
+            if (node is T val && (Where == null || Where(val)))
+            {
+                Nodes.Add(val);
+            }
+
+            base.Visit(node);
+        }
+    }
+
+    public static (TReturn, TFind) FindViolatingNode<TFind, TReturn>(List<string> fileLines, IRuleViolation ruleViolation, Func<TFind, TReturn> getFragment) where TFind : TSqlFragment where TReturn : TSqlFragment
+    {
+        TFind val = FindNodes<TFind>(fileLines).FirstOrDefault(delegate (TFind x)
+        {
+            TReturn val2 = getFragment(x);
+            return val2?.StartLine == ruleViolation.Line && val2?.StartColumn == ruleViolation.Column;
+        });
+        return (getFragment(val), val);
+    }
+
+    public static List<T> FindNodes<T>(List<string> fileLines, Func<T, bool> where = null) where T : TSqlFragment
+    {
+        using StringReader input = new StringReader(string.Join("\n", fileLines));
+        IList<ParseError> errors;
+        TSqlFragment tSqlFragment = new TSql150Parser(initialQuotedIdentifiers: true, SqlEngineType.All).Parse(input, out errors);
+        if (errors != null && errors.Any())
+        {
+            throw new Exception("Parsing failed. " + string.Join(". ", errors.Select((ParseError x) => x.Message)));
+        }
+
+        FindViolatingNodeVisitor<T> findViolatingNodeVisitor = new FindViolatingNodeVisitor<T>(where);
+        tSqlFragment.Accept(findViolatingNodeVisitor);
+        return findViolatingNodeVisitor.Nodes;
+    }
+
+    public static List<T> FindNodes<T>(TSqlFragment statement, Func<T, bool> where = null) where T : TSqlFragment
+    {
+        FindViolatingNodeVisitor<T> findViolatingNodeVisitor = new FindViolatingNodeVisitor<T>(where);
+        statement.Accept(findViolatingNodeVisitor);
+        return findViolatingNodeVisitor.Nodes;
+    }
+
+    public static T FindViolatingNode<T>(List<string> fileLines, IRuleViolation ruleViolation) where T : TSqlFragment
+    {
+        return FindViolatingNode(fileLines, ruleViolation, (T x) => x).Item1;
+    }
+
+    public static string GetIndent(List<string> fileLines, IRuleViolation ruleViolation)
+    {
+        return GetIndent(fileLines[ruleViolation.Line - 1]);
+    }
+
+    public static string GetIndent(List<string> fileLines, TSqlStatement statement)
+    {
+        return GetIndent(fileLines[statement.StartLine - 1]);
+    }
+
+    public static string GetString(TSqlFragment fragment)
+    {
+        return string.Join(string.Empty, from x in fragment.ScriptTokenStream.Where((TSqlParserToken x, int i) => i >= fragment.FirstTokenIndex && i <= fragment.LastTokenIndex)
+                                         select x.Text);
+    }
+
+    private static string GetIndent(string ifLine)
+    {
+        Match match = new Regex("^\\s+").Match(ifLine);
+        string result = string.Empty;
+        if (match.Success)
+        {
+            result = match.Value;
+        }
+
+        return result;
+    }
+}