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      $errors->{email} = "Already in use";
    }
    

      # Errors or not?:
      keys %$errors ? return $errors : return;
    }
    

    1;# return true:

File: `htdocs/profile.asp`

    <%@ Page UseMasterPage="/masters/global.asp" %>
    

    <asp:Content PlaceHolderID="meta_title">My Profile</asp:Content>
    

    <asp:Content PlaceHolderID="headline">My Profile</asp:Content>
    

    <asp:Content PlaceHolderID="main_content">
    <%
      if( my $msg = $Session->{msg} ) {
    %>
      <div class="message"><%= $msg %></div>
    <%
      }# end if()
    %>
    

    <%
      # Get our $user:
      use App::db::user;
      my $user = App::db::user->retrieve( $Session->{user_id} );
    %>
    

    <div style="float: left; width: 40%; border-right: solid 1px #000;">
      <h3>Incoming Messages</h3>
    <%
      foreach my $msg ( $user->messages_in(undef, { order_by => "created_on ASC"} ) ) {
    %>
      <div class="msg">
        <span class="from"><%= $msg->sender->email %></span> says:<br/>
        <div class="body"><%= $Server->HTMLEncode( $msg->body ) %></div>
        <span class="date"><%= $msg->created_on %></span>
      </div>
    <%
      }# end foreach()
    %>
    </div>
    

    <div style="float: right; width: 40%; border: dotted 1px #000;">
      <h3>Send New Message</h3>
      <form id="send_form" method="post" action="/handlers/app.send">
        <p>
          <label>Recipient:</label>
          <select name="to_user_id">
    <%
      my @users = App::db::user->search_where({
        user_id => {'!=' => $user->id }
      }, {
        order_by => "email"
      });
      foreach my $user ( @users ) {
    %>
            <option value="<%= $user->id %>"><%= $Server->HTMLEncode( $user->email ) %></option>
    <%
      }# end foreach()
    %>
          </select>
        </p>
        <p>
          <label>Subject:</label>
          <input type="text" name="subject" maxlength="100" />
        </p>
        <p>
          <label>Message:</label><br/>
          <textarea name="body"></textarea>
        </p>
        <p>
          <input type="submit" value="Send Message" />
        </p>
      </form>
    </div>
    </asp:Content>

The form submits to `/handlers/app.send` which maps to `handlers/app/send.pm`

File: `handlers/app/send.pm`

    package app::send;
    

    use strict;
    use warnings 'all';
    use base 'ASP4::FormHandler';
    use vars __PACKAGE__->VARS;
    use App::db::user;
    use App::db::message;
    

    sub run {
      my ($self, $context) = @_;
      

    # Create the message:
    my $msg = eval {
      App::db::message->do_transaction(sub {
        my $msg = App::db::message->create(
          from_user_id  => $Session->{user_id},
          to_user_id    => $Form->{to_user_id},
          subject       => $Form->{subject},
          body          => $Form->{body},
        );
        

        # Send an email to the recipient:
        $Server->Mail(
          from        => 'root@localhost',
          'reply-to'  => $msg->sender->email,
          to          => $msg->recipient->email,
          subject     => 'New in-club message',
          message     => <<"MSG",
    Dear user,
    

    Another user (@{[ $msg->sender->email ]}) has sent you an in-club message.
    

    Please login and view it on your profile at http://$ENV{HTTP_HOST}/