chore: initial git load of code space

2026-05-12 08:52:33 -05:00
parent 9abada692f
commit 5e467bcc9c
384 changed files with 65960 additions and 2 deletions
@@ -0,0 +1,63 @@
+using Strata.SqlTools.SqlBreakdown.Extensions;
+
+namespace Strata.SqlTools.SqlBreakdown.Classes;
+
+/// <summary>
+/// Represents a SQL FROM clause with optional JOIN clauses.
+/// </summary>
+public class SqlFrom
+{
+    private readonly SqlTable _firstTable;
+    private readonly List<SqlJoin> _joins;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="SqlFrom"/> class.
+    /// </summary>
+    /// <param name="tableExpression">The primary table expression.</param>
+    /// <param name="tableAlias">The primary table alias.</param>
+    public SqlFrom(string tableExpression, string tableAlias)
+    {
+        _firstTable = new SqlTable(tableExpression, tableAlias);
+        _joins = new List<SqlJoin>();
+    }
+
+    /// <summary>
+    /// Adds a JOIN to the FROM clause.
+    /// </summary>
+    /// <param name="table2Expression">The table expression to join.</param>
+    /// <param name="table2Alias">The alias for the joined table.</param>
+    /// <param name="table1Column">The column from the primary table.</param>
+    /// <param name="table2Column">The column from the joined table.</param>
+    public void Join(string table2Expression, string table2Alias, string table1Column, string table2Column)
+    {
+        var theJoin = new SqlJoin(table2Expression, table2Alias, table1Column, table2Column);
+        Join(theJoin);
+    }
+
+    /// <summary>
+    /// Adds a pre-constructed JOIN to the FROM clause.
+    /// </summary>
+    /// <param name="join">The join to add.</param>
+    public void Join(SqlJoin join)
+    {
+        _joins.Add(join);
+    }
+
+    /// <summary>
+    /// Returns the SQL FROM clause as a string.
+    /// </summary>
+    /// <returns>The FROM clause with all JOINs.</returns>
+    public override string ToString()
+    {
+        var output = new StringBuilderEx();
+        output.AppendFormat($"\t{_firstTable.TableExpression} {_firstTable.TableAlias}\n");
+
+        foreach (var join in _joins)
+        {
+            output.AppendFormat($"\tINNER JOIN {join.TableExpression} {join.TableAlias} ON {join.GetJoinOn(_firstTable.TableAlias)}\n");
+        }
+
+        return output.ToString();
+    }
+}
+