can_view

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... in permissions.naml
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<macro name="can_view" requires="user" dot_parameter="node_attr">
    <n.set_local_user.this_user />
    <n.set_local_node.node_attr/>
    <n.block.>
        <n.either>
            <condition1.local_user.owns.local_node/>
            <condition2.either>
                <condition1.local_user.has_permission node="[n.local_node/]" permission_node="[n.local_node.app_or_root/]" permission="[n.view_permission/]" />
                <condition2.local_user.is_site_admin />
            </condition2.either>
        </n.either>
    </n.block.>
</macro>