[ 
https://jira.duraspace.org/browse/DS-749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Kevin Van de Velde updated DS-749:
----------------------------------

    Attachment: Bitstream_ordering_backend.patch

Taking into Marks comments into consideration I have created a back end which 
uses the configuration he recommended. I will also be creating a UI for the 
XMLUI & JSPUI for this that does not require a shell script to run.
                
> allow for bitstream display order to be changed
> -----------------------------------------------
>
>                 Key: DS-749
>                 URL: https://jira.duraspace.org/browse/DS-749
>             Project: DSpace
>          Issue Type: New Feature
>          Components: JSPUI
>            Reporter: Jose Blanco
>         Attachments: Bitstream_ordering_backend.patch, 
> GenerateBitDisplayOrder.java
>
>
> This patch allows user with access priviledges to edit an item to change the 
> order in which a bitstream is displayed 
> in the item display.  This patch is for the JSPUI. 
> The first thing that needs to be done is that a new field needs to be added 
> to the bitstream table with the following SQL:
> alter table bitstream add display_order integer;
> Then that field needs to be populated with the values in the sequence_id 
> table.  I have provided a perl script 
> that I used to do this: fix-display-order.
> Once this is done, make the following code changes.
> File =>tools/edit-item-form.jsp
> +             <th id="t11" class="oddRowOddCol"><strong><fmt:message 
> key="jsp.tools.edit-item-form.elem10"/></strong></th>
>               <th id="t11" class="oddRowEvenCol"><strong><fmt:message 
> key="jsp.tools.edit-item-form.elem5"/></strong></th>
> AND
> +                <td headers="t11" class="<%= row %>RowOddCol">
> +                    <input type="text" name="bitstream_order_<%= key %>" 
> value="<%= (Integer.toString(bitstreams[j].getDisplayOrder()) == null ? "" : 
> Integer.toString(bitstreams[j].getDisplayOrder())) %>" size="4"/>
> +                </td>
>               <% if (bundles[i].getName().equals("ORIGINAL"))
>                  { %>
> File => Messages.properties
> jsp.tools.edit-item-form.elem9                                  = Description
> +jsp.tools.edit-item-form.elem10                                = 
> Display<BR>Order
> file Biststream.java
> +     public int getDisplayOrder()
> +     {
> +         return bRow.getIntColumn("display_order");
> +     }
> + 
> +     public void setDisplayOrder(int order)
> +     {
> +         bRow.setColumn("display_order", order);
> +         modifiedMetadata = true;
> +         addDetails("DisplayOrder");
> +     }
>  
> File => Item.java
>                 if (streams[k].getSequenceID() < 0)
>                 {
>                     streams[k].setSequenceID(sequence);
> +                    streams[k].setDisplayOrder(sequence);
>                     sequence++;
>                     streams[k].update();
>                 }
> File => Bundle.java
> -                        + "bundle2bitstream.bundle_id= ? ",
> +                         + "bundle2bitstream.bundle_id= ? "
> +                       + "ORDER BY bitstream.display_order",
> File =>  EditItemServlet.java
>                     int formatID = UIUtil.getIntParameter(request,
>                             "bitstream_format_id_" + key);
> +                    int display_order = UIUtil.getIntParameter(request,
> +                            "bitstream_order_" + key);
> AND
>                     bitstream.setName(name);
>                     bitstream.setSource(source);
>                     bitstream.setDescription(desc);
> +                    bitstream.setDisplayOrder(display_order);
> ==============================================
> This is the fix-display-order perl script used to iniailize display_order:
> #!/usr/bin/perl
> RE.
> BEGIN
> {
>         require "strict.pm";
>         strict::import();
> }
> # ----------------------------------------------------------------------
> #               start of MAIN
> # ----------------------------------------------------------------------
> use Encode;
> use utf8;
> use DBI;
> use File::Path;
> my $dbhP = DBI->connect("dbi:Pg:dbname=dspace-name", "dspace-user", 
> "password");
> &UpdateDisplayOrder ();
> $dbhP->disconnect;
> exit;
> sub UpdateDisplayOrder
> {
>     
>   my $statement = qq{select bitstream_id, sequence_id from bitstream};
>     my $sth = $dbhP->prepare($statement)
>       or die "Couldn't prepare statement: " . $dbhP->errstr;
>     
>     # Read the matching records and print them out
>     $sth->execute()             # Execute the query
>       or die "Couldn't execute statement: " . $sth->errstr;
>     my $count = 0;
>     my ( $url, $msg );
>     my ( $bitstream_id, $sequence_id, @data );
>     while (@data = $sth->fetchrow_array()) {
>       $bitstream_id       = $data[0];
>       $sequence_id        = $data[1];
>      
>       if ( $sequence_id )
>       {
>       my $sql = qq{update bitstream set display_order = $sequence_id where 
> bitstream_id= $bitstream_id};
>         &ProcessSQL ( $sql );
>       }
>     }
>     $sth->finish;
> }
> sub ProcessSQL 
>   {
>     my ( $statement ) = @_;
>     my $sth = $dbhP->prepare($statement)
>       or die "Couldn't prepare statement: " . $dbhP->errstr;
>   
>     # Read the matching records and print them out
>     $sth->execute()             # Execute the query
>       or die "Couldn't execute statement: " . $sth->errstr;
>     $sth->finish;
>   }
> __END__;
> ==============================================

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