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SQLLinter/Infrastructure/Rules/Common/ColumnNumberCalculator.cs

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+using Microsoft.SqlServer.TransactSql.ScriptDom;
+using SQLLinter.Core;
+
+namespace SQLLinter.Infrastructure.Rules.Common;
+
+public static class ColumnNumberCalculator
+{
+    public static int GetNodeColumnPosition(TSqlFragment node)
+    {
+        var line = string.Empty;
+        var nodeStartLine = node.StartLine;
+        var nodeLastLine = node.ScriptTokenStream[node.LastTokenIndex].Line;
+
+        for (var tokenIndex = 0; tokenIndex <= node.LastTokenIndex; tokenIndex++)
+        {
+            var token = node.ScriptTokenStream[tokenIndex];
+            if (token.Line >= nodeStartLine && token.Line <= nodeLastLine)
+            {
+                line += token.Text;
+            }
+        }
+
+        var positionOfNodeOnLine = line.LastIndexOf(node.ScriptTokenStream[node.FirstTokenIndex].Text, StringComparison.Ordinal);
+        var charactersBeforeNode = line.Substring(0, positionOfNodeOnLine);
+
+        var offSet = 0;
+        if (charactersBeforeNode.IndexOf(" ", StringComparison.Ordinal) != -1)
+        {
+            offSet = 1;
+        }
+
+        var tabCount = CountTabs(charactersBeforeNode);
+        var totalTabLength = tabCount * Constants.TabWidth;
+
+        var nodePosition = totalTabLength + (charactersBeforeNode.Length - tabCount) + offSet;
+        return nodePosition;
+    }
+
+    /// <summary>
+    /// Returns -1 if can't be found
+    /// </summary>
+    /// <param name="line"></param>
+    /// <param name="column"></param>
+    /// <returns></returns>
+    public static int GetIndex(string line, int column)
+    {
+        var index = 0;
+        while (index != column)
+        {
+            if (line.Length <= index)
+            {
+                return -1;
+            }
+
+            if (line[index] == '\t')
+            {
+                column -= (Constants.TabWidth - 1);
+            }
+            index++;
+        }
+        return column - 1;
+    }
+
+    private static int CountTabs(string charactersBeforeNode)
+    {
+        int tabCount = 0;
+        foreach (var c in charactersBeforeNode)
+        {
+            if (c == '\t')
+            {
+                tabCount++;
+            }
+        }
+
+        return tabCount;
+    }
+
+    // count all tabs on a line up to the last token index
+    public static int CountTabsBeforeToken(int lastTokenLine, int lastTokenIndex, IEnumerable<TSqlParserToken> tokens)
+    {
+        var tabCount = 0;
+        var sqlParserTokens = tokens as TSqlParserToken[] ?? tokens.ToArray();
+
+        for (var tokenIndex = 0; tokenIndex < lastTokenIndex; tokenIndex++)
+        {
+            var token = sqlParserTokens[tokenIndex];
+            if (token.Line != lastTokenLine || string.IsNullOrEmpty(token.Text))
+            {
+                continue;
+            }
+
+            tabCount += CountTabs(token.Text);
+        }
+
+        return tabCount;
+    }
+
+    public static int GetColumnNumberBeforeToken(int tabsOnLine, TSqlParserToken token)
+    {
+        return token.Column + ((tabsOnLine * Constants.TabWidth) - tabsOnLine);
+    }
+
+    public static int GetColumnNumberAfterToken(int tabsOnLine, TSqlParserToken token)
+    {
+        return token.Column + token.Text.Length + ((tabsOnLine * Constants.TabWidth) - tabsOnLine);
+    }
+}