<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >

<!--
    Licensed to the Apache Software Foundation (ASF) under one
    or more contributor license agreements.  See the NOTICE file
    distributed with this work for additional information
    regarding copyright ownership.  The ASF licenses this file
    to you under the Apache License, Version 2.0 (the
    "License"); you may not use this file except in compliance
    with the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing,
    software distributed under the License is distributed on an
    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    KIND, either express or implied.  See the License for the
    specific language governing permissions and limitations
    under the License.
-->

<mapper namespace="org.apache.guacamole.auth.jdbc.base.EntityMapper" >

    <!--
      * SQL fragment which tests whether the value of the given column matches
      * the given entity ID. If group identifiers are provided, the IDs of the
      * entities for all groups having those identifiers are tested, as well.
      * Disabled groups are ignored.
      *
      * @param column
      *     The name of the column to test. This column MUST contain an entity
      *     ID (a foreign key into the guacamole_entity table).
      *
      * @param entityID
      *     The ID of the specific entity to test the column against.
      *
      * @param groups
      *     A collection of group identifiers to additionally test the column
      *     against. Though this functionality is optional, a collection must
      *     always be given, even if that collection is empty.
      -->
    <sql id="isRelatedEntity">
        (
            ${column} = ${entityID}
            <if test="!${groups}.isEmpty()">
                OR ${column} IN (
                    SELECT guacamole_entity.entity_id
                    FROM guacamole_entity
                    JOIN guacamole_user_group ON guacamole_user_group.entity_id = guacamole_entity.entity_id
                    WHERE
                        type = 'USER_GROUP'::guacamole_entity_type
                        AND 
                        <choose>
                            <when test="caseSensitivity.caseSensitiveGroupNames()">
                                name IN
                                <foreach collection="${groups}" item="effectiveGroup"
                                         open="(" separator="," close=")">
                                    #{effectiveGroup,jdbcType=VARCHAR}
                                </foreach>
                            </when>
                            <otherwise>
                                LOWER(name) IN
                                <foreach collection="${groups}" item="effectiveGroup"
                                         open="(" separator="," close=")">
                                    LOWER(#{effectiveGroup,jdbcType=VARCHAR})
                                </foreach>
                            </otherwise>
                        </choose>
                        AND disabled = false
                )
            </if>
        )
    </sql>

    <!-- Select names of all effective groups (including inherited) -->
    <select id="selectEffectiveGroupIdentifiers" resultType="string">

        WITH RECURSIVE related_entity(entity_id) AS (
                SELECT
                    guacamole_user_group.entity_id
                FROM guacamole_user_group
                JOIN guacamole_user_group_member ON guacamole_user_group.user_group_id = guacamole_user_group_member.user_group_id
                WHERE
                    guacamole_user_group_member.member_entity_id = #{entity.entityID}
                    AND guacamole_user_group.disabled = false
            <if test="!effectiveGroups.isEmpty()">
                UNION
                    SELECT
                        guacamole_entity.entity_id
                    FROM guacamole_entity
                    JOIN guacamole_user_group ON guacamole_user_group.entity_id = guacamole_entity.entity_id
                    WHERE
                        type = 'USER_GROUP'::guacamole_entity_type
                        AND 
                        <choose>
                            <when test="caseSensitivity.caseSensitiveGroupNames()">
                                name IN
                                <foreach collection="effectiveGroups" item="effectiveGroup"
                                         open="(" separator="," close=")">
                                    #{effectiveGroup,jdbcType=VARCHAR}
                                </foreach>
                            </when>
                            <otherwise>
                                LOWER(name) IN
                                <foreach collection="effectiveGroups" item="effectiveGroup"
                                         open="(" separator="," close=")">
                                    LOWER(#{effectiveGroup,jdbcType=VARCHAR})
                                </foreach>
                            </otherwise>
                        </choose>
                        AND guacamole_user_group.disabled = false
            </if>
            UNION
                SELECT
                    guacamole_user_group.entity_id
                FROM related_entity
                JOIN guacamole_user_group_member ON related_entity.entity_id = guacamole_user_group_member.member_entity_id
                JOIN guacamole_user_group ON guacamole_user_group.user_group_id = guacamole_user_group_member.user_group_id
                WHERE
                    guacamole_user_group.disabled = false
        )
        SELECT name
        FROM related_entity
        JOIN guacamole_entity ON related_entity.entity_id = guacamole_entity.entity_id
        WHERE
            guacamole_entity.type = 'USER_GROUP'::guacamole_entity_type;

    </select>

    <!-- Insert single entity -->
    <insert id="insert" useGeneratedKeys="true" keyProperty="entity.entityID"
            parameterType="org.apache.guacamole.auth.jdbc.base.EntityModel">

        INSERT INTO guacamole_entity (
            name,
            type
        )
        VALUES (
            #{entity.identifier,jdbcType=VARCHAR},
            #{entity.entityType,jdbcType=VARCHAR}::guacamole_entity_type
        )

    </insert>

</mapper>
