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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * course_overview block rendrer
 *
 * @package    block_course_overview
 * @copyright  2012 Adam Olley <adam.olley@netspot.com.au>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
defined('MOODLE_INTERNAL') || die;

/**
 * Course_overview block rendrer
 *
 * @copyright  2012 Adam Olley <adam.olley@netspot.com.au>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class block_course_overview_uwmoodle_renderer extends plugin_renderer_base {

    /**
     * Construct contents of course_overview block
     *
     * @param array $courses list of courses in sorted order
     * @param array $overviews list of course overviews
     * @return string html to be displayed in course_overview block
     */
    public function course_overview_allterms($terms, $overviews, $selectedterm) {
        $html .= html_writer::start_tag('div', array('class' => 'courselistcontainer', 'id' => 'uwmm_terms_content'));
        foreach ($terms as $termcode => $courses) {
            if ($termcode != $selectedterm) {
                $hidden = 'hidden';
            } else {
                $hidden = '';
            }
            $html .= html_writer::start_tag('div', array('class' => 'courselist '.$hidden, 'id' => 'uwmm_term_'.$termcode.'_courses'));

            $termstr = block_course_overview_uwmoodle_get_term_name($termcode);
            $title = get_string('mycoursesinterm', 'block_course_overview_uwmoodle', $termstr);
            $html .= html_writer::start_tag('div', array('class' => 'title'));
            $html .= $this->output->heading($title, 2, 'termname');
            $html .= html_writer::end_tag('div');

            $html .= $this->course_overview($courses, $overviews, $termcode);
            $html .= html_writer::end_tag('div');
        }
        $html .= html_writer::end_tag('div');
        $this->page->requires->js_init_call('M.block_course_overview_uwmoodle.termselector');

        return $html;
    }

    public function course_overview($courses, $overviews, $termcode) {
        $html = '';
        $html .= html_writer::start_tag('div', array('class' => 'courselistcontainer'));
        if (empty($courses)) {
            $html .= $this->output->box_start('coursebox');
            $html .= $this->output->heading(get_string('nocourses','block_course_overview_uwmoodle'), 3);
            $html .= $this->output->box_end();
        } else {
            foreach ($courses as $key => $course) {
                $html .= $this->output->box_start('coursebox');
                $html .= html_writer::start_tag('div', array('class' => 'course_title'));

                // No need to pass title through s() here as it will be done automatically by html_writer.
                $attributes = array('title' => $course->fullname);
                if (empty($course->visible)) {
                    $attributes['class'] = 'dimmed';
                }
                $courseurl = new moodle_url('/course/view.php', array('id' => $course->id));
                $coursefullname = format_string($course->fullname, true, $course->id);
                $link = html_writer::link($courseurl, $coursefullname, $attributes);
                $html .= $this->output->heading($link, 3, 'title');
                //$html .= $this->output->box('', 'flush');
                $html .= html_writer::end_tag('div');

                if (isset($overviews[$course->id])) {
                    $html .= $this->activity_display($course->id, $overviews[$course->id], $termcode);
                //$html .= $this->output->box('', 'flush');
                $html .= $this->output->box_end();
            }
        }
        $html .= html_writer::end_tag('div');
        return $html;
    }

    public function term_list($termcodes, $selectedterm) {
        $thisurl = $this->page->url;
        $html  = '';
        $html .= html_writer::start_tag('div', array('class' => 'termscontainer'));
        $html .= html_writer::start_tag('ul', array('class' => 'terms', 'id' => 'uwmm_terms'));
        foreach ($termcodes as $termcode) {
            $termname = block_course_overview_uwmoodle_get_term_name($termcode);
            $attributes = array('id'=>'uwmm_term_'.$termcode);
            if ($termcode == $selectedterm) {
                $attributes['class'] = 'active';
            }
            $html .= html_writer::start_tag('li', $attributes);
            $html .= html_writer::tag('a', $termname, array('href' => $thisurl->out(false, array('term'=>$termcode))));
            $html .= html_writer::end_tag('li');
        }
        $html .= html_writer::end_tag('ul');
        $html .= html_writer::end_tag('div');
    public function begin_course_block($title, $id='', $helpidentifier='') {
        $attributes = array('class' => 'courseblock clearfix');
        if (!empty($id)) {
            $attributes['id'] = $id;
        }
        $html .= html_writer::start_tag('div', $attributes);
        $html .= html_writer::start_tag('div', array('class' => 'cbheader'));
        $help = '';
        if ($helpidentifier) {
            $help = $this->output->help_icon($helpidentifier, 'block_course_overview_uwmoodle');
        }
        $html .= $this->output->heading($title.$help, 2, 'sectiontitle help');
        $html .= html_writer::end_tag('div');
        $html .= html_writer::start_tag('div', array('class' => 'cbcontent'));
    public function end_course_block() {
        $html  = '';
        $html .= html_writer::end_tag('div');
        $html .= html_writer::end_tag('div');
        return $html;
    }
    public function course_block($terms, $overviews, $selectedterm) {
        $html  = '';
        $html .= $this->begin_course_block(get_string('courses', 'block_course_overview_uwmoodle'), 'uwmm_mycourses_block');
        $termcodes = array_keys($terms);
        $html .= html_writer::start_tag('div', array('class' => 'lhs'));
        $html .= $this->term_list($termcodes, $selectedterm);
        $html .= html_writer::end_tag('div');
        $html .= html_writer::start_tag('div', array('class' => 'rhs'));
        $html .= $this->course_overview_allterms($terms, $overviews, $selectedterm);
        $html .= html_writer::end_tag('div');
        $html .= $this->end_course_block();
        return $html;
    }

    public function other_course_block($courses, $overviews) {
        $html  = '';
        $html .= $this->begin_course_block(get_string('ongoingcourses', 'block_course_overview_uwmoodle'), 'uwmm_othercourses_block', 'ongoingcourses');
        $html .= $this->course_overview($courses, $overviews, block_course_overview_uwmoodle::TERM_OTHER);
        $html .= $this->end_course_block();
        return $html;
    }


    /**
     * Render term selection box above the list of courses
     *
     * @param array $terms
     * @param string $selectedterm
     * @return string html to be displayed in course_overview block
     */
    public function course_header($terms, $selectedterm) {
        $output = '';
        $thisterm = block_course_overview_uwmoodle_get_term_name($selectedterm);

        $url = new moodle_url('/my/index.php');

        $output .= $this->output->box_start('notice');
        $output .= html_writer::start_tag('ul', array('class'=>'termlist'));
        $output .= html_writer::start_tag('li');
        $output .= get_string('selectterm', 'block_course_overview_uwmoodle');
        $output .= html_writer::end_tag('li');
        // sort by term date, ascending
        ksort($terms, SORT_NUMERIC);
        $firstitem = true;
        foreach ($terms as $termcode => $courses) {
            if ($termcode == block_course_overview_uwmoodle::TERM_OTHER) {
                // non-term courses are shown regardless
                continue;
            }
            $termname = block_course_overview_uwmoodle_get_term_name($termcode);
            $output .= html_writer::start_tag('li');
            if (!$firstitem) {
                $output .= ' | ';
            } else {
                $firstitem = false;
            }
            if ($termcode == $selectedterm) {
                $output .= html_writer::tag('span', $this->rarrow().$termname, array('class'=>'selectedterm'));
            } else {
                $output .= html_writer::tag('a', $termname, array('href' => $url->out(false, array('term'=>$termcode))));
            }
            $output .= html_writer::end_tag('li');
            //$options[$termcode] = block_course_overview_uwmoodle_get_term_name($termcode);
        //ksort($options, SORT_NUMERIC);
        $output .= html_writer::end_tag('ul');


        //$output .= $this->output->heading(get_string('mycoursesinterm', 'block_course_overview_uwmoodle', $thisterm), 2, 'sectiontitle');

        //$url = new moodle_url('/my/index.php');
        //$select = new single_select($url, 'term', $options, '', array('' => 'choosedots'));
        //$select->set_label(get_string('selectterm', 'block_course_overview_uwmoodle'));
        //$output .= $this->output->render($select);
    /**
     * Render block footer
     *
     * @return string html to be displayed in course_overview block
     */
    public function footer() {
        global $CFG;
        $output = html_writer::tag('a', get_string("fulllistofcourses"), array('href' => "$CFG->wwwroot/course/index.php"));
        $output .= ' ...';
        return $output;
    }

    /**
     * Coustuct activities overview for a course
     *
     * @param int $cid course id
     * @param array $overview overview of activities in course
     * @return string html of activities overview
     */
    protected function activity_display($cid, $overview, $id) {
        $output = html_writer::start_tag('div', array('class' => 'activity_info'));
        foreach (array_keys($overview) as $module) {
            $output .= html_writer::start_tag('div', array('class' => 'activity_overview'));
            $url = new moodle_url("/mod/$module/index.php", array('id' => $cid));
            $modulename = get_string('modulename', $module);
            $icontext = html_writer::link($url, $this->output->pix_icon('icon', $modulename, 'mod_'.$module, array('class'=>'iconlarge')));
            if (get_string_manager()->string_exists("activityoverview", $module)) {
                $icontext .= get_string("activityoverview", $module);
            } else {
                $icontext .= get_string("activityoverview", 'block_course_overview_uwmoodle', $modulename);
            }

            // Add collapsible region with overview text in it.
            $output .= $this->collapsible_region($overview[$module], '', 'uwmm_region_'.$id.'_'.$cid.'_'.$module, $icontext, '', true);

            $output .= html_writer::end_tag('div');
        }
        $output .= html_writer::end_tag('div');
        return $output;
    }

    /**
     * Creates collapsable region
     *
     * @param string $contents existing contents
     * @param string $classes class names added to the div that is output.
     * @param string $id id added to the div that is output. Must not be blank.
     * @param string $caption text displayed at the top. Clicking on this will cause the region to expand or contract.
     * @param string $userpref the name of the user preference that stores the user's preferred default state.
     *      (May be blank if you do not wish the state to be persisted.
     * @param bool $default Initial collapsed state to use if the user_preference it not set.
     * @return bool if true, return the HTML as a string, rather than printing it.
     */
    protected function collapsible_region($contents, $classes, $id, $caption, $userpref = '', $default = false) {
            $output  = $this->collapsible_region_start($classes, $id, $caption, $userpref, $default);
            $output .= $contents;
            $output .= $this->collapsible_region_end();

            return $output;
        }

    /**
     * Print (or return) the start of a collapsible region, that has a caption that can
     * be clicked to expand or collapse the region. If JavaScript is off, then the region
     * will always be expanded.
     *
     * @param string $classes class names added to the div that is output.
     * @param string $id id added to the div that is output. Must not be blank.
     * @param string $caption text displayed at the top. Clicking on this will cause the region to expand or contract.
     * @param string $userpref the name of the user preference that stores the user's preferred default state.
     *      (May be blank if you do not wish the state to be persisted.
     * @param bool $default Initial collapsed state to use if the user_preference it not set.
     * @return bool if true, return the HTML as a string, rather than printing it.
     */
    protected function collapsible_region_start($classes, $id, $caption, $userpref = '', $default = false) {
        // Work out the initial state.
        if (!empty($userpref) and is_string($userpref)) {
            user_preference_allow_ajax_update($userpref, PARAM_BOOL);
            $collapsed = get_user_preferences($userpref, $default);
        } else {
            $collapsed = $default;
            $userpref = false;
        }

        if ($collapsed) {
            $classes .= ' collapsed';
        }

        $output = '';
        $output .= '<div id="' . $id . '" class="collapsibleregion ' . $classes . '">';
        $output .= '<div id="' . $id . '_sizer">';
        $output .= '<div id="' . $id . '_caption" class="collapsibleregioncaption">';
        $output .= $caption . ' ';
        $output .= '</div><div id="' . $id . '_inner" class="collapsibleregioninner">';
        $this->page->requires->js_init_call('M.block_course_overview_uwmoodle.collapsible', array($id, $userpref, get_string('clicktohideshow')));

        return $output;
    }

    /**
     * Close a region started with print_collapsible_region_start.
     *
     * @return string return the HTML as a string, rather than printing it.
     */
    protected function collapsible_region_end() {
        $output = '</div></div></div>';
        return $output;
    }

    /**
     * Cretes html for welcome area
     *
     * @param int $msgcount number of messages
     * @return string html string for welcome area.
     */
    public function welcome_area($msgcount) {
        global $USER;
        $output = $this->output->box_start('welcome_area');

        $picture = $this->output->user_picture($USER, array('size' => 75, 'class' => 'welcome_userpicture'));
        $output .= html_writer::tag('div', $picture, array('class' => 'profilepicture'));

        $output .= $this->output->box_start('welcome_message');
        $output .= $this->output->heading(get_string('welcome', 'block_course_overview_uwmoodle', $USER->firstname));
            $output .= get_string('youhavemessages', 'block_course_overview_uwmoodle', $msgcount);
            $output .= get_string('youhavenomessages', 'block_course_overview_uwmoodle');
        $output .= html_writer::link(new moodle_url('/message/index.php'), get_string('message'.$plural, 'block_course_overview_uwmoodle'));
        $output .= $this->output->box_end();
        $output .= $this->output->box('', 'flush');
        $output .= $this->output->box_end();

        return $output;
    }
}