106 lines
3.4 KiB
C#
106 lines
3.4 KiB
C#
//
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// NpgsqlUserNameProvider.cs
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//
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// Author:
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// Paul Schneider <paul@pschneider.fr>
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//
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// Copyright (c) 2015 GNU GPL
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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using System;
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using System.Collections.Specialized;
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using System.Configuration;
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namespace Npgsql.Web.RolesAndMembers
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{
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using Yavsc.Model.RolesAndMembers;
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/// <summary>
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/// Npgsql user name provider.
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/// </summary>
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public class NpgsqlUserNameProvider: ChangeUserNameProvider {
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private string applicationName;
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private string connectionString;
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/// <summary>
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/// Initialize the specified iname and config.
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/// </summary>
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/// <param name="iname">Iname.</param>
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/// <param name="config">Config.</param>
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public override void Initialize (string iname, NameValueCollection config)
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{
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// get the
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// - application name
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// - connection string name
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// - the connection string from its name
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string cnxName = config ["connectionStringName"];
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connectionString = ConfigurationManager.ConnectionStrings [cnxName].ConnectionString;
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config.Remove ("connectionStringName");
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applicationName = config ["applicationName"];
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config.Remove ("applicationName");
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base.Initialize (iname, config);
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}
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private string GetConfigValue (string configValue, string defaultValue)
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{
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if (String.IsNullOrEmpty (configValue))
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return defaultValue;
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return configValue;
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}
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#region implemented abstract members of ChangeUserNameProvider
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/// <summary>
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/// Changes the name.
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/// </summary>
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/// <param name="oldName">Old name.</param>
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/// <param name="newName">New name.</param>
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public override void ChangeName (string oldName, string newName)
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{
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using (NpgsqlConnection conn = new NpgsqlConnection (connectionString)) {
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conn.Open ();
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using (NpgsqlCommand cmd = new NpgsqlCommand (
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"UPDATE users set " +
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"username = :uname where username = :oname" +
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" AND ApplicationName = :appname ", conn)) {
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cmd.Parameters.AddWithValue ("uname", newName);
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cmd.Parameters.AddWithValue ("oname", oldName);
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cmd.Parameters.AddWithValue ("appname", this.applicationName);
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cmd.ExecuteNonQuery ();
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}
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}
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}
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/// <summary>
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/// Determines whether this instance is name available the specified name.
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/// </summary>
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/// <returns>true</returns>
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/// <c>false</c>
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/// <param name="name">Name.</param>
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public override bool IsNameAvailable (string name)
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{
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using (NpgsqlConnection conn = new NpgsqlConnection (connectionString)) {
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conn.Open ();
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using (NpgsqlCommand cmd = new NpgsqlCommand (
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"SELECT count(*)>0 FROM users " +
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"WHERE username = :uname AND ApplicationName = :appname", conn)) {
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cmd.Parameters.AddWithValue ("uname", name);
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cmd.Parameters.AddWithValue ("appname", this.applicationName);
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return (bool) cmd.ExecuteScalar ();
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}
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}
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}
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#endregion
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}
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}
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