<?PHP //$Id$
    //This php script contains all the stuff to backup/restore
    //wiki mods

    //This is the "graphical" structure of the wiki mod:
    //
    //                       wiki
    //                     (CL,pk->id)
    //
    //                    wiki_entries
    //                     (pk->id, fk->wikiid)
    //
    //                    wiki_pages
    //                     (pk->pagename,version,wiki, fk->wiki)
    //
    // Meaning: pk->primary key field of the table
    //          fk->foreign key to link with parent
    //          nt->nested field (recursive data)
    //          CL->course level info
    //          UL->user level info
    //          files->table may have files)
    //
    //-----------------------------------------------------------

    //This function executes all the backup procedure about this mod
    function wiki_backup_mods($bf,$preferences) {
        global $CFG;

        $status = true;

        ////Iterate over wiki table
        if ($wikis = get_records ("wiki","course", $preferences->backup_course,"id")) {
            foreach ($wikis as $wiki) {
                //Start mod
                fwrite ($bf,start_tag("MOD",3,true));
                //Print assignment data
                fwrite ($bf,full_tag("ID",4,false,$wiki->id));
                fwrite ($bf,full_tag("MODTYPE",4,false,"wiki"));
                fwrite ($bf,full_tag("NAME",4,false,$wiki->name));
                fwrite ($bf,full_tag("SUMMARY",4,false,$wiki->summary));
                fwrite ($bf,full_tag("PAGENAME",4,false,$wiki->wtype));
                fwrite ($bf,full_tag("WTYPE",4,false,$wiki->wtype));
                fwrite ($bf,full_tag("EWIKIPRINTTITLE",4,false,$wiki->ewikiprinttitle));
                fwrite ($bf,full_tag("HTMLMODE",4,false,$wiki->htmlmode));
                fwrite ($bf,full_tag("EWIKIACCEPTBINARY",4,false,$wiki->ewikiacceptbinary));
                fwrite ($bf,full_tag("DISABLECAMELCASE",4,false,$wiki->disablecamelcase));
                fwrite ($bf,full_tag("SETPAGEFLAGS",4,false,$wiki->setpageflags));
                fwrite ($bf,full_tag("STRIPPAGES",4,false,$wiki->strippages));
                fwrite ($bf,full_tag("REMOVEPAGES",4,false,$wiki->removepages));
                fwrite ($bf,full_tag("REVERTCHANGES",4,false,$wiki->revertchanges));
                fwrite ($bf,full_tag("INITIALCONTENT",4,false,$wiki->initialcontent));
                fwrite ($bf,full_tag("TIMEMODIFIED",4,false,$wiki->timemodified));

                //backup entries and pages
                if ($preferences->mods["wiki"]->userinfo) {
                    $status=backup_wiki_entries($bf,$preferences,$wiki->id, $preferences->mods["wiki"]->userinfo);
                }

                //End mod
                 fwrite ($bf,end_tag("MOD",3,true));
            }
        }
        //if we've selected to backup users info, then backup files too
        if ($status) {
            if ($preferences->mods["wiki"]->userinfo) {
                $status = backup_wiki_files($bf,$preferences);    
            }
        }
        return $status;
    }

    ////Return an array of info (name,value)
    function wiki_check_backup_mods($course,$user_data=false,$backup_unique_code) {
         //First the course data
         $info[0][0] = get_string("modulenameplural","wiki");
         $info[0][1] = count_records("wiki", "course", "$course");
         return $info;
    }

     //Backup wiki_entries contents (executed from wiki_backup_mods)
    function backup_wiki_entries ($bf,$preferences,$wiki, $userinfo) {

        global $CFG;

        $status = true;

        $wiki_entries = get_records("wiki_entries","wikiid",$wiki,"id");
        //If there are entries
        if ($wiki_entries) {
            //Write start tag
            $status =fwrite ($bf,start_tag("ENTRIES",4,true));
            //Iterate over each entry
            foreach ($wiki_entries as $wik_ent) {
                //Entry start
                $status =fwrite ($bf,start_tag("ENTRY",5,true));

                fwrite ($bf,full_tag("ID",6,false,$wik_ent->id));
                fwrite ($bf,full_tag("GROUPID",6,false,$wik_ent->groupid));
                fwrite ($bf,full_tag("USERID",6,false,$wik_ent->userid));
                fwrite ($bf,full_tag("PAGENAME",6,false,$wik_ent->pagename));
                fwrite ($bf,full_tag("TIMEMODIFIED",6,false,$wik_ent->timemodified));

                //Now save entry pages
                $status = backup_wiki_pages($bf,$preferences,$wik_ent->id);

                //Entry end
                $status =fwrite ($bf,end_tag("ENTRY",5,true));
            }
            //Write end tag
            $status =fwrite ($bf,end_tag("ENTRIES",4,true));
        }
        return $status;
    }

    //Write wiki_pages contents
    function backup_wiki_pages ($bf,$preferences,$entryid) {

        global $CFG;

        $status = true;

        $pages = get_records("wiki_pages","wiki",$entryid);
        if ($pages) {
            //Start tag
            $status =fwrite ($bf,start_tag("PAGES",6,true));
            //Iterate over each page
            foreach ($pages as $page) {
                $status =fwrite ($bf,start_tag("PAGE",7,true));

                fwrite ($bf,full_tag("ID",8,false,$page->id));
                fwrite ($bf,full_tag("PAGENAME",8,false,$page->pagename));
                fwrite ($bf,full_tag("VERSION",8,false,$page->version));
                fwrite ($bf,full_tag("FLAGS",8,false,$page->flags));
                fwrite ($bf,full_tag("CONTENT",8,false,$page->content));
                fwrite ($bf,full_tag("AUTHOR",8,false,$page->author));
                fwrite ($bf,full_tag("USERID",8,false,$page->userid));
                fwrite ($bf,full_tag("CREATED",8,false,$page->created));
                fwrite ($bf,full_tag("LASTMODIFIED",8,false,$page->lastmodified));
                fwrite ($bf,full_tag("REFS",8,false,str_replace("\n","$@LINEFEED@$",$page->refs)));
                fwrite ($bf,full_tag("META",8,false,$page->meta));
                fwrite ($bf,full_tag("HITS",8,false,$page->hits));

                $status =fwrite ($bf,end_tag("PAGE",7,true));
            }
            $status =fwrite ($bf,end_tag("PAGES",6,true));
        }
        return $status;
    }
    
    //Backup wiki binary files
    function backup_wiki_files($bf,$preferences) {

        global $CFG;

        $status = true;

        //First we check to moddata exists and create it as necessary
        //in temp/backup/$backup_code  dir
        $status = check_and_create_moddata_dir($preferences->backup_unique_code);
        //Now copy the forum dir
        if ($status) {
            //Only if it exists !! Thanks to Daniel Miksik.
            if (is_dir($CFG->dataroot."/".$preferences->backup_course."/".$CFG->moddata."/wiki")) {
                $status = backup_copy_file($CFG->dataroot."/".$preferences->backup_course."/".$CFG->moddata."/wiki",
                                           $CFG->dataroot."/temp/backup/".$preferences->backup_unique_code."/moddata/wiki");
            }
        }

        return $status;

    }

?>