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SQLLinter/Infrastructure/Parser/FragmentBuilder.cs

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+using Microsoft.SqlServer.TransactSql.ScriptDom;
+using SQLLinter.Common;
+using SQLLinter.Core;
+using SQLLinter.Core.Interfaces;
+using SQLLinter.Infrastructure.Configuration.Overrides;
+using SQLLinter.Infrastructure.Interfaces;
+
+namespace SQLLinter.Infrastructure.Parser;
+
+public class FragmentBuilder : IFragmentBuilder
+{
+    private readonly TSqlParser parser;
+    private readonly IReporter _reporter;
+
+    public FragmentBuilder(IReporter reporter) : this(reporter, Constants.DefaultCompatabilityLevel)
+    {
+    }
+
+    public FragmentBuilder(IReporter reporter, int compatabilityLevel)
+    {
+        parser = GetSqlParser(compatabilityLevel);
+        _reporter = reporter;
+    }
+
+    public TSqlFragment? GetFragment(string path, TextReader txtRdr, out IList<ParseError> errors, IEnumerable<IOverride> overrides = null)
+    {
+        TSqlFragment fragment;
+
+        OverrideCompatabilityLevel? compatibilityLevel = null;
+        if (overrides != null)
+        {
+            foreach (var lintingOverride in overrides)
+            {
+                if (lintingOverride is OverrideCompatabilityLevel overrideCompatability)
+                {
+                    compatibilityLevel = overrideCompatability;
+                }
+            }
+        }
+
+        TSqlParser curParser;
+
+        if (compatibilityLevel != null)
+        {
+            curParser = GetSqlParser(compatibilityLevel.CompatabilityLevel);
+        }
+        else
+        {
+            curParser = parser;
+        }
+
+        fragment = curParser.Parse(txtRdr, out errors); //TODO: Возвращать эти ошибки
+
+        if (fragment == null)
+        {
+            foreach (var err in errors)
+            {
+                _reporter.ReportViolation(path, err.Line, err.Column, RuleViolationSeverity.Critical, "parse", err.Message);
+            }
+        }
+
+        return fragment?.FirstTokenIndex != -1 ? fragment : null;
+    }
+
+    private static TSqlParser GetSqlParser(int compatabilityLevel)
+    {
+        TSqlParser parser = compatabilityLevel switch
+        {
+            80 => new TSql80Parser(true),
+            90 => new TSql90Parser(true),
+            100 => new TSql100Parser(true),
+            110 => new TSql110Parser(true),
+            120 => new TSql120Parser(true),
+            130 => new TSql130Parser(true),
+            140 => new TSql140Parser(true),
+            150 => new TSql150Parser(true),
+            160 => new TSql160Parser(true),
+            170 => new TSql170Parser(true),
+            _ => new TSql120Parser(true),
+        };
+
+        return parser;
+    }
+}