resource.class.php

很棒的在线教学系统

        } else if (!empty($defaults['popup'])) {
            $defaults['windowpopup'] = 1;
            if (array_key_exists('popup', $defaults)) {
                $rawoptions = explode(',', $defaults['popup']);
                foreach ($rawoptions as $rawoption) {
                    $option = explode('=', trim($rawoption));
                    $defaults[$option[0]] = $option[1];
                }
            }
        } else {
            $defaults['windowpopup'] = 0;
        }
        //Converts the alltext to form fields
        if (!empty($defaults['alltext'])) {
            $parameters = $this->alltext2parameters($defaults['alltext']);
            $defaults['param_tableofcontents']    = $parameters->tableofcontents;
            $defaults['param_navigationbuttons']  = $parameters->navigationbuttons;
            $defaults['param_skipsubmenus']       = $parameters->skipsubmenus;
            $defaults['param_navigationmenu']     = $parameters->navigationmenu;
            $defaults['param_navigationupbutton'] = $parameters->navigationupbutton;
        }
    }

    function setup_elements(&$mform) {
        global $CFG, $RESOURCE_WINDOW_OPTIONS;

        $mform->addElement('choosecoursefileorimsrepo', 'reference', get_string('location'));
        $mform->addRule('name', null, 'required', null, 'client');

        $mform->addElement('header', 'displaysettings', get_string('display', 'resource'));

        $woptions = array(0 => get_string('pagewindow', 'resource'), 1 => get_string('newwindow', 'resource'));
        $mform->addElement('select', 'windowpopup', get_string('display', 'resource'), $woptions);
        $mform->setDefault('windowpopup', !empty($CFG->resource_popup));

        foreach ($RESOURCE_WINDOW_OPTIONS as $option) {
            if ($option == 'height' or $option == 'width') {
                $mform->addElement('text', $option, get_string('new'.$option, 'resource'), array('size'=>'4'));
                $mform->setDefault($option, $CFG->{'resource_popup'.$option});
                $mform->disabledIf($option, 'windowpopup', 'eq', 0);
            } else {
                $mform->addElement('checkbox', $option, get_string('new'.$option, 'resource'));
                $mform->setDefault($option, $CFG->{'resource_popup'.$option});
                $mform->disabledIf($option, 'windowpopup', 'eq', 0);
            }
            $mform->setAdvanced($option);
        }

        $mform->addElement('header', 'parameters', get_string('parameters', 'resource'));

        $mform->addElement('selectyesno', 'param_navigationmenu', get_string('navigationmenu', 'resource'));
        $mform->setDefault('param_navigationmenu', 1);

        $mform->addElement('selectyesno', 'param_tableofcontents', get_string('tableofcontents', 'resource'));
        $mform->disabledIf('param_tableofcontents', 'param_navigationmenu', 'eq', 1);
        $mform->setDefault('param_tableofcontents', 0);

        $mform->addElement('selectyesno', 'param_navigationbuttons', get_string('navigationbuttons', 'resource'));
        $mform->setDefault('param_navigationbuttons', 0);

        $mform->addElement('selectyesno', 'param_skipsubmenus', get_string('skipsubmenus', 'resource'));
        $mform->setDefault('param_skipsubmenus', 1);
        $mform->disabledIf('param_skipsubmenus', 'param_navigationmenu', 'eq', 1);

        $mform->addElement('selectyesno', 'param_navigationupbutton', get_string('navigationup', 'resource'));
        $mform->setDefault('param_navigationupbutton', 1);
        $mform->disabledIf('param_navigationupbutton', 'param_navigationmenu', 'eq', 1);

    }

} //End class

///
/// General purpose functions
///
    /*** This function will serialize the variable passed and send it
     *   to filesystem
     */
    function ims_save_serialized_file($destination, $var) {
        $status = false;
        if ($ser = serialize($var)) {
            $status = ims_var2file($destination, $ser);
        }
        return $status;
     }

    /*** This function will unserialize the variable stored
     *   in filesystem
     */
    function ims_load_serialized_file($file) {
        $status = false;
        if ($ser = ims_file2var($file)) {
            $status = unserialize($ser);
        }
        return $status;
    }

    /*** This function will load all the contents of one file to one variable
     *   Not suitable for BIG files
     */
    function ims_file2var ($file) {
        $status = true;
        $var = '';
        $fp = fopen($file, 'r')
            or $status = false;
        if ($status) {
           while ($data = fread($fp, 4096)) {
               $var = $var.$data;
           }
           fclose($fp);
        }
        if (!$status) {
            $var = false;
        }
        return $var;
    }

    /*** This file will write the contents of one variable to a file
     *   Not suitable for BIG files
     */
    function ims_var2file ($file, $var) {
        $status = false;
        if ($out = fopen($file,"w")) {
            $status = fwrite($out, $var);
            fclose($out);
        }
        return $status;
    }

    /*** This function will generate the TOC file for the package
     *   from an specified parent to be used in the view of the IMS
     *   Now hilights 'selected page' also.
     */
    function ims_generate_toc($items, $resource, $page=0, $selected_page = -1) {
        global $CFG;

        $contents = '';

    /// Configure links behaviour
        $fullurl = $CFG->wwwroot.'/mod/resource/view.php?r='.$resource->id.'&frameset=ims&page=';

    /// Iterate over items to build the menu
        $currlevel = 0;
        $currorder = 0;
        $endlevel  = 0;
        $openlielement = false;
        foreach ($items as $item) {
            if (!is_object($item)) {
                continue;
            }
        /// Skip pages until we arrive to $page
            if ($item->id < $page) {
                continue;
            }
        /// Arrive to page, we store its level
            if ($item->id == $page) {
                $endlevel = $item->level;
                continue;
            }
        /// We are after page and inside it (level > endlevel)
            if ($item->id > $page && $item->level > $endlevel) {
            /// Start Level
                if ($item->level > $currlevel) {
                    $contents .= '<ol class="listlevel_'.$item->level.'">';
                    $openlielement = false;
                }
            /// End Level
                if ($item->level < $currlevel) {
                    $contents .= '</li>';
                    $contents .= '</ol>';
                }
            /// If we have some openlielement, just close it
                if ($openlielement) {
                    $contents .= '</li>';
                }
            /// Add item
                $contents .= '<li>';
                if (!empty($item->href)) {
                    if ($item->id == $selected_page) $contents .= '<div id="ims-toc-selected">';
                    $contents .= '<a href="'.$fullurl.$item->id.'" target="_parent">'.$item->title.'</a>';
                    if ($item->id == $selected_page) $contents .= '</div>';
                } else {
                    $contents .= $item->title;
                }
                $currlevel = $item->level;
                $openlielement = true;
                continue;
            }
        /// We have reached endlevel, exit
            if ($item->id > $page && $item->level <= $endlevel) {
                break;
            }
        }
    /// Close up to $endlevel
        for ($i=$currlevel;$i>$endlevel;$i--) {
            $contents .= '</li>';
            $contents .= '</ol>';
        }

        return $contents;
    }

    /*** This function will return the correct html code needed
     *   to show the previous button in the nav frame
     **/
    function ims_get_prev_nav_button ($items, $resource_obj, $page) {
        $strprevious        = get_string("previous", "resource");

        $cm = $resource_obj->cm;
        $resource = $resource_obj->resource;

        $contents = '';

        $page--;
    /// Skips any menu pages since these are redundant with sidemenu.
        if (!empty($resource_obj->parameters->skipsubmenus)) {
            while(empty($items[$page]->href) && $page >= 0) {
                $page--;
            }
        }

        if ($page >= 1 ) {  //0 and 1 pages haven't previous
            $contents .= "<span class=\"ims-nav-button\"><a href=\"view.php?id={$cm->id}&amp;type={$resource->type}&amp;page={$page}&amp;frameset=ims\">$strprevious</a></span>";
        } else {
            $contents .= '<span class="ims-nav-dimmed">'.$strprevious.'</span>';
        }

        return $contents;
    }

    /*** This function will return the correct html code needed
     *   to show the next button in the nav frame
     **/
    function ims_get_next_nav_button ($items, $resource_obj, $page) {
        $strnext        = get_string("next", "resource");

        $cm = $resource_obj->cm;
        $resource = $resource_obj->resource;

        $contents = '';

        $page++;
    /// Skips any menu pages since these are redundant with sidemenu.
        if (!empty($resource_obj->parameters->skipsubmenus)) {
            while(empty($items[$page]->href) && !empty($items[$page])) {
                $page++;
            }
        }

        if (!empty($items[$page])) {  //If the next page exists
            $contents .= "<span class=\"ims-nav-button\"><a href=\"view.php?id={$cm->id}&amp;type={$resource->type}&amp;page={$page}&amp;frameset=ims\">$strnext</a></span>";
        } else {
            $contents .= '<span class="ims-nav-dimmed">'.$strnext.'</span>';
        }


        return $contents;
    }

    /*** This function will return the correct html code needed
     *   to show the up button in the nav frame
     **/
    function ims_get_up_nav_button ($items, $resource_obj, $page) {
        $strup        = get_string("upbutton", "resource");

        $cm = $resource_obj->cm;
        $resource = $resource_obj->resource;

        $contents = '';

        if (!empty($resource_obj->parameters->navigationupbutton)) {
            if ($page > 1 && $items[$page]->parent > 0) {  //If the page has parent
                $page = $items[$page]->parent;
                $contents .= "<span class=\"ims-nav-button\"><a href=\"view.php?id={$cm->id}&amp;type={$resource->type}&amp;page={$page}&amp;frameset=ims\">$strup</a></span>";
            } else {
                $contents .= "<span class=\"ims-nav-dimmed\">$strup</span>";
            }
        }
        return $contents;
    }

    /*** This function will return the correct html code needed
     *   to show the toc button in the nav frame
     **/
    function ims_get_toc_nav_button ($items, $resource_obj, $page) {

        $cm = $resource_obj->cm;
        $resource = $resource_obj->resource;

        $strtoc = get_string('tableofcontentsabbrev', 'resource');

        $contents = '';

        if (!empty($resource_obj->parameters->tableofcontents)) {  //The toc is enabled
            $page = 0;
            $contents .= "<span class=\"ims-nav-button\"><a href=\"view.php?id={$cm->id}&amp;type={$resource->type}&amp;page={$page}&amp;frameset=ims\">{$strtoc}</a></span>";
        }

        return $contents;
    }

?>