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[sgn.git] / cgi-bin / forum / add_post.pl

=head1 add_post.pl

add_post.pl adds posts to topics or comments to webpages. 

For the former, add_post.pl takes a topic_id parameter. For the latter, add_post takes two parameters, page_type and page_object_id. If not parameter is specified, add_post.pl shows an error message. If all three parameters are specified, the topic_id overrides the other two.

If no post_text is supplied, add_post.pl displays an input mask. Otherwise it processes the entry and tries to add post_text to the database, with the logged in user as the submitter and the topic id as specified above.

A refering_page parameter can be used to generate a link back to the calling page.

=cut
    
use strict;

use CXGN::Page;
use CXGN::DB::Connection;
use CXGN::Login;
use CXGN::People;
use CXGN::People::Forum;
use CXGN::People::Person;
use CXGN::Page::FormattingHelpers qw/  page_title_html
                                     blue_section_html  /;

my $SIZELIMIT = 10000; # the maximal number of bytes in a post.

my $page = CXGN::Page->new( "SGN Forum | Add Post", "Lukas");
my $dbh = CXGN::DB::Connection->new();

#
# get information about the poster
#
my ( $person, $name, $sp_person_id ) = do {
    # to enable anonymous comments, change the verify_session to has_session
    if( my $sp_person_id = CXGN::Login->new($dbh)->verify_session ) {
        my $person = CXGN::People::Person -> new($dbh, $sp_person_id);
        my $name = $person->get_first_name()." ".$person->get_last_name();
        $sp_person_id = $person -> get_sp_person_id();
        ( $person, $name, $sp_person_id )
    } else {
        ( (undef) x 3 )
    }
};


my ($subject, $post_text, $parent_post_id, $topic_id, $page_type, $page_object_id, $refering_page, $action) = $page -> get_encoded_arguments("subject", "post_text", "parent_post_id", "topic_id", "page_type", "page_object_id", "refering_page", "action");

# we define 3 actions: 
# 1) input
# 2) review
# 3) save
# all other values for the action parameter will show the input as default.


my $parent_post = "";
my $parent_subject = "";
my $display_subject = "";
my $parent_post_text = "";
my $parent_post_explain = "";
my $topic;
my $topic_name = "";
my $subject_input = ""; 
#
# if a topic_id is supplied, simply add the post to the given topic id.
#
if ($topic_id) { 
    $parent_post = CXGN::People::Forum::Post -> new($dbh, $parent_post_id);
    $parent_subject = $parent_post->get_subject();
    $parent_post_text = $parent_post->get_post_text();
    $parent_post_explain = "";
    $display_subject = "RE: $parent_subject";
    if ($parent_post_text) { 
        $parent_post_explain = "Your message will be attached to the following message: 
        <table summary=\"\" class=\"sgnblue\"><tr><td><pre>$parent_post_text</pre></td></tr></table>
        <br />";
        $subject_input = "<input type=\"text\" name=\"subject\" value=\"$display_subject\" /><br /><br /> ";
    }

    $topic = CXGN::People::Forum::Topic -> new($dbh, $topic_id);
    if (!$topic) { 
        $page->error_page("No legal topic id was supplied. [topic_id=$topic_id]");
    }
    $topic_name =  $topic -> get_topic_name();
}
#
# if the page_type and page_object_id are supplied, it is a page comment. Get the 
# topic id for that page and id.
#
elsif ($page_type && $page_object_id) { 
    $topic = CXGN::People::Forum::Topic->new_page_comment($dbh, $page_type, $page_object_id);
    if (!$topic->get_topic_name()) { 
        $topic->set_topic_name($page_type." ".$page_object_id); 
        $topic->set_person_id($sp_person_id);

    }
    $topic_name = "$page_type id: $page_object_id";
}
else
{
    $page->error_page("Sorry, but there was insufficient data to add this post.");    
}

#
# create a post object to work from
#
my $post = CXGN::People::Forum::Post->new($dbh);
$post->set_subject($subject);
$post->set_person_id($sp_person_id);
$post->set_parent_post_id($parent_post_id);
$post->set_forum_topic_id($topic_id);
my $formatted_post_text = $post->format_post_text($post_text);

# 
# create $link with a link back to the original posting page
# (this can be a detail page or it can be a topic_id specific posts.pl page
#
my $link;
if ($refering_page) { 
    $link = "<a href=\"$refering_page\">Back to posts</a>"; 
}
else { 
    $link = "<a href=\"posts.pl?topic_id=$topic_id\">Back to posts</a>";
}
#
# perform the appropriate action, depending on the
# action parameter
#
if ($action eq "review") {    

    my $truncated = 0;
    my $display_post_text = "";
    if (length($post_text)>$SIZELIMIT) { 
        $display_post_text = substr($post_text, 0, $SIZELIMIT);
        $truncated = 1;
    }
    else { 
        $display_post_text = $post_text; 
    }
    
    my $truncated_warning = "";
    if ($truncated) { 
        $truncated_warning = "<b>Note:</b> Your post exceeds $SIZELIMIT characters and has been truncated.
                Please use the 'go back' button to edit your post, or submit to accept the 
                truncated version.<br /><br />\n";
    }


    $page -> header();

    print page_title_html("Review your post");
    
    print <<HTML;
    <div class="container-fluid">
    Enter post -> <b>Review post</b> -> Store post<br /><br />
    This is how the text of your post will appear. Please use the 'store post' button for permanently adding the post
    or the 'modify post' button to go back and revise the post. To cancel, click on 'back to posts'.<br /><br />
 
    $truncated_warning

    <div class="panel panel-primary"><div class="panel-body">$formatted_post_text</div></div>

    <br /><br />

    <table width="100%"><tr><td align="left">
    <form action="add_post.pl" method="post">
    <input type="hidden" name="post_text" value="$post_text" />
    <input type="hidden" name="page_type" value="$page_type" />
    <input type="hidden" name="page_object_id" value="$page_object_id" />
    <input type="hidden" name="refering_page" value="$refering_page" />
    <input type="hidden" name="action" value="input" />
    <input type="hidden" name="topic_id" value="$topic_id" />
    <input class="btn btn-info" type="submit" value="modify post" />
    </form>
    <td><td>
    $link
    </td><td align="right">
    <form action="add_post.pl" method="post">
    <input type="hidden" name="post_text" value="$post_text" />
    <input type="hidden" name="page_type" value="$page_type" />
    <input type="hidden" name="page_object_id" value="$page_object_id" />
    <input type="hidden" name="refering_page" value="$refering_page" />
    <input type="hidden" name="action" value="save" />
    <input type="hidden" name="topic_id" value="$topic_id" />
    <input class="btn btn-primary" type="submit" value="store post" />
    </form>
    </td></tr></table>
    </div>
HTML

    $page -> footer();
}

elsif ($action eq "save") {
    #
    # save the object if action is "save"
    #
    $topic->set_page_type($page_type);
    $topic->set_page_object_id($page_object_id);
    $topic->store();

    $topic_id = $topic->get_forum_topic_id();
    $post->set_forum_topic_id($topic_id);

    my $truncated = 0;
    if (length($post_text)>$SIZELIMIT) { 
        $post_text = substr($post_text, 0, $SIZELIMIT);
        $truncated = 1;
    }

    $post->set_post_text($post_text);
    $post->store();

    $page->header();

    print page_title_html("Your post was successfully stored");
    print "Enter post -> Review post -> <b>Store post</b></a><br /><br />\n";

    if ($truncated) { 
        print "<b>Note:</b>Your post has been truncated to $SIZELIMIT characters.<br />\n";
    }

    my $display_post_text = $post->format_post_text($post_text);
    #print "submitter: $sp_person_id topic: $topic_id, $page_type, $page_object_id. text:<br /><br />";
    print "<div class=\"panel panel-primary\" ><div class=\"panel-body\">$display_post_text</div></div>";
    print "<br /><br /><br />\n";
    
 
    print "$link<br /><br /><br />\n";

    $page->footer();

}

else { 
    #
    # the action is "input" or anything else. 
    #
    $page -> header();

    print page_title_html("Enter Post for topic \"$topic_name\"");

    print <<HTML;

    <form method="post" action="add_post.pl">
        
        Steps: <b>Enter post</b> -> Review post -> Store post<br /><br /> 
        $parent_post_explain<br />
        
        Please enter your comment below. You can delete the post later if you are logged in.<br />
        HTML tags are not supported. You can add links to your post by using square brackets.  For example:<br />
        <tt>[url]sgn.cornell.edu[/url]</tt> will appear as <a href="http://sgn.cornell.edu">sgn.cornell.edu</a> in the post.<br /><br />

        Size limit per post is $SIZELIMIT characters, including spaces and punctuation.<br /><br />
        <b>Note:</b> this service is provided as a courtesy. SGN reserves the right to delete posts at any time for any reason.
        <br /><br />
        <input type="hidden" name="parent_post_id" value="$parent_post_id" />
        <input type="hidden" name="topic_id" value="$topic_id" />
        <input type="hidden" name="page_type" value="$page_type" />
        <input type="hidden" name="page_object_id" value="$page_object_id" />
        <input type="hidden" name="refering_page" value="$refering_page" />
        <input type="hidden" name="action" value="review" />
        $subject_input

        Post Text:<br />
        <textarea class="form-control" rows="12" cols="80" name="post_text">$post_text</textarea>
        <br /><br />

        <table width="100%"><tr><td align="left">
        $link 
        </td><td align="right">
        <input class="btn btn-primary" type=submit value="Review post" />
        </form>
        </td></tr></table>

        <br />
        
      
      <br />
      <br />

HTML

      $page->footer();

}