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<components
  xmlns:d="urn:schemas-nreco:nicnet:dalc:v1"
  xmlns:r="urn:schemas-nreco:nreco:core:v1"
	xmlns:e="urn:schemas-nreco:nreco:entity:v1"
	xmlns:xi="http://www.w3.org/2003/XInclude">
	
	<db-dalc name="db" xmlns="urn:schemas-nreco:nicnet:dalc:v1" datasetfactory="dsFactory" manager-name="dbManager">
		<driver>
			<mssql>
				<connection><string name="mainDb"/></connection>			 
			</mssql>			
		</driver>
		<permissions>
			<query sourcename="accounts" operation="retrieve">
				1=1
			</query>
			<query sourcename="accounts" operation="update">
				username="{var:arg}" or "{var:arg}" in account_roles(rolename="admin")[account_roles.username]
			</query>
			
			<!-- database-layer retrieve permissions for pages -->
			<query sourcename="pages" operation="retrieve">
				is_public="true":boolean
				or
				(author="{var:arg}" and author!="")
				or
				id in page_visibility(
					page_visibility.account_id = accounts(accounts.username="{var:arg}")[accounts.id]
				)[page_visibility.page_id]
				or
				"{var:arg}" in account_roles(rolename="admin")[account_roles.username]
			</query>

		</permissions>
		<dataviews>
			<view name="accounts_view" origin="accounts">
				<fields>
					<select>a.*, 'User: '+a.username as rdf_label</select>
					<count>count(*)</count>
					<mapping>
						<field name="account_id">a.id</field>
						<field name="rdf_label">a.username</field>
					</mapping>
				</fields>
				<sql>
					select {var:fields}
					from accounts a
					WHERE 1=1
					{ognl:@String@IsNullOrEmpty(#whereExpression) ? "" : " and "+#whereExpression}
					{ognl:@String@IsNullOrEmpty(#sortExpression) ? "" : " ORDER BY "+#sortExpression}
				</sql>	 
			</view>

			<view name="pages_view" origin="pages">
				<fields>
					<select>p.*, a.id as author_id, 'Page: '+p.title as rdf_label</select>
					<count>count(p.id)</count>
					<mapping>
						<field name="id">p.id</field>
						<field name="rdf_label">p.title</field>
					</mapping>
				</fields>
				<sql>
					select {var:fields}
					from pages p
					left join accounts a ON (a.username=p.author)
					WHERE 1=1
					{ognl:@String@IsNullOrEmpty(#whereExpression) ? "" : " and "+#whereExpression}
					{ognl:@String@IsNullOrEmpty(#sortExpression) ? "" : " ORDER BY "+#sortExpression}
				</sql>
			</view>

      <view name="pages_by_type_view" origin="pages">
        <fields>
          <select>*</select>
          <count>count(p.id)</count>
          <mapping>
            <field name="id">p.id</field>
          </mapping>
        </fields>
        <sql>
					select p.content_type, count(id) as count
					from pages p
					GROUP BY p.content_type
        </sql>
      </view>

			<view name="pages_by_tag_view">
				<fields>
					<select>*</select>
					<count>count(t.id)</count>
				</fields>
				<sql>
					select 
						t.title, t.id, 
						(select count(*) from page_tags pt where pt.tag_id=t.id) as count
					from tags t
				</sql>
			</view>

		</dataviews>
		<triggers>
			<entity-dalc-triggers>
				<xi:include href="entities.xml" xpointer="xpointer(/components/*)"/>
			</entity-dalc-triggers>

			<lucene-dalc-triggers>
				<xi:include href="lucene.xml" xpointer="xpointer(/components/*)"/>
			</lucene-dalc-triggers>

			<datarow event="inserting" sourcename="pages">
				<r:operation>
					<r:chain>
						<!-- check title unique -->
						<r:provide result="title">
							<r:target>
								<r:dalc from="db">
									<r:query>pages(title="{databind:[row][title]}")[title]</r:query>
								</r:dalc>
							</r:target>
						</r:provide>
						<r:execute if='#row["title"].ToString()==#title'>
							<r:target>
								<r:throw message="Page with such title already exists."/>
							</r:target>
						</r:execute>
					</r:chain>
				</r:operation>
			</datarow>
				  
		</triggers>
	</db-dalc>	
	
	
</components>