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QueryColumn.cs
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using System.Linq;
using FizzCode.DbTools.DataDefinition.Base;
namespace FizzCode.DbTools.QueryBuilder;
public class QueryColumn
{
public QueryColumn()
{
Value = string.Empty;
}
public QueryColumn(QueryColumn column, string @as)
{
Value = column.Value;
Alias = column.Alias;
As = @as;
IsDbColumn = column.IsDbColumn;
}
public QueryColumn(string value, string alias)
{
Value = value;
As = alias;
}
public string Value { get; init; }
/// <summary>
/// The name of the column, if different from Value (ex. ou.OrgUnitId AS 'MyId').
/// </summary>
public string? As { get; set; }
/// <summary>
/// The alias for the table.
/// </summary>
public string? Alias { get; set; }
public bool IsDbColumn { get; set; }
public static implicit operator QueryColumn(SqlColumn column)
{
var queryColumn = new QueryColumn
{
Value = column.Name!,
IsDbColumn = true,
};
var aliasTableProperty = column.Table.Properties.OfType<AliasTableProperty>().FirstOrDefault();
if (aliasTableProperty != null)
queryColumn.Alias = aliasTableProperty.Alias;
return queryColumn;
}
public static implicit operator QueryColumn(SqlViewColumn column)
{
var queryColumn = new QueryColumn
{
Value = column.Name!,
IsDbColumn = true,
};
var aliasTableProperty = column.View.Properties.OfType<AliasViewProperty>().FirstOrDefault();
if (aliasTableProperty != null)
queryColumn.Alias = aliasTableProperty.Alias;
return queryColumn;
}
public override string ToString()
{
var sb = new System.Text.StringBuilder();
sb.Append(Value);
if (As != null)
{
sb.Append(" AS ");
sb.Append(As);
}
if (IsDbColumn)
{
sb.Append(" (DbColumn)");
}
return sb.ToString();
}
}