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package pt.estgp.estgweb.domain;
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import pt.estgp.estgweb.utils.Globals;
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/**
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 * @author Jorge Machado
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 * @date 21/Abr/2008
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 * @time 14:37:50
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 * @see pt.estgp.estgweb.domain
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 */
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public class CourseUnitBlogImpl extends CourseUnitBlog
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{
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    public CourseUnitBlogImpl()
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    {
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        super.setType(Globals.BLOG_TYPE_COURSE_UNIT);
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    }
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    public boolean canAddPost(GenericUserImpl user)
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    {
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        return canAddPost(user,false);
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    }
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    /**
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     * Check if user has any target role and if is associated in some way with blog course unit
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     *
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     * @param user to check
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     * @return true if can add post
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     */
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    public boolean canAddPost(GenericUserImpl user, boolean transaction)
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    {
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        if(!super.canAddPost(user,transaction))
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            return false;
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        if(user == null)
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            return false;
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        if(user instanceof Teacher)
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        {
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            return ((TeacherImpl)user).hasCourseUnit(getCourseUnit().getId(),transaction);
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        }
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        else if(user instanceof Student)
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        {
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            return ((StudentImpl)user).hasCourseUnit(getCourseUnit().getId(),transaction);
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        }
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        return false;
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    }
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    public boolean canLoad(GenericUserImpl user)
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    {
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        return !isCourseUnitInternal() || canAddPost(user);
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    }
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    public boolean canLoadInOpenTransaction(GenericUserImpl user)
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    {
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        return !isCourseUnitInternal() || canAddPost(user,true);
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    }
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    public boolean checkIsOwnedBy(GenericUser u, boolean transaction)
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    {
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        if(u instanceof UserImpl)
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            if(((UserImpl) u).checkIsTeacherOfCourseUnit(getCourseUnit().getId(), transaction))
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                return true;
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        return false;
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    }
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    public boolean checkIsOwnedBy(GenericUser u)
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    {
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        return checkIsOwnedBy(u, false);
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    }
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}