lib.php

<?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/>.

/**
 * This is built using the Clean template to allow for new theme's using
 * Moodle's new Bootstrap theme engine
 *
 *
 * @package   theme_essential
 * @copyright 2013 Julian Ridden
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

/**
 * Parses CSS before it is cached.
 *
 * This function can make alterations and replace patterns within the CSS.
 *
 * @param string $css The CSS
 * @param theme_config $theme The theme config object.
 * @return string The parsed CSS The parsed CSS.
 */

/**
 * Include the Awesome Font.
 */
function theme_essential_set_fontwww($css) {
    global $CFG, $PAGE;
    if(empty($CFG->themewww)){
        $themewww = $CFG->wwwroot."/theme";
    } else {
        $themewww = $CFG->themewww;
    }
    $tag = '[[setting:fontwww]]';
    
    $theme = theme_config::load('essential');
    if (!empty($theme->settings->bootstrapcdn)) {
        $css = str_replace($tag, '//netdna.bootstrapcdn.com/font-awesome/4.0.0/fonts/', $css);
    } else {
        $css = str_replace($tag, $themewww.'/essential/fonts/', $css);
    }
    return $css;
}

/**
 * Adds the logo to CSS.
 *
 * @param string $css The CSS.
 * @param string $logo The URL of the logo.
 * @return string The parsed CSS
 */
function theme_essential_set_logo($css, $logo) {
    global $OUTPUT;
    $tag = '[[setting:logo]]';
    $replacement = $logo;
    if (is_null($replacement)) {
        $replacement = '';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

/**
 * Serves any files associated with the theme settings.
 *
 * @param stdClass $course
 * @param stdClass $cm
 * @param context $context
 * @param string $filearea
 * @param array $args
 * @param bool $forcedownload
 * @param array $options
 * @return bool
 */
function theme_essential_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload, array $options = array()) {
    if ($context->contextlevel == CONTEXT_SYSTEM) {
        $theme = theme_config::load('essential');
        if ($filearea === 'logo') {
            return $theme->setting_file_serve('logo', $args, $forcedownload, $options);
        } else if ($filearea === 'pagebackground') {
            return $theme->setting_file_serve('pagebackground', $args, $forcedownload, $options);
        } else if ((substr($filearea, 0, 5) === 'slide') && (substr($filearea, 6, 5) === 'image')) {
            return $theme->setting_file_serve($filearea, $args, $forcedownload, $options);
        } else if ((substr($filearea, 0, 9) === 'marketing') && (substr($filearea, 10, 5) === 'image')) {
            return $theme->setting_file_serve($filearea, $args, $forcedownload, $options);
        } else if ($filearea === 'iphoneicon') {
            return $theme->setting_file_serve('iphoneicon', $args, $forcedownload, $options);
        } else if ($filearea === 'iphoneretinaicon') {
            return $theme->setting_file_serve('iphoneretinaicon', $args, $forcedownload, $options);
        } else if ($filearea === 'ipadicon') {
            return $theme->setting_file_serve('ipadicon', $args, $forcedownload, $options);
        } else if ($filearea === 'ipadretinaicon') {
            return $theme->setting_file_serve('ipadretinaicon', $args, $forcedownload, $options);
        } else {
            send_file_not_found();
        }
    } else {
        send_file_not_found();
    }
}

/**
 * Set the width on the container-fluid div
 *
 * @param string $css
 * @param mixed $pagewidth
 * @return string
 */
function essential_set_pagewidth($css, $pagewidth) {
    $tag = '[[setting:pagewidth]]';
    $replacement = $pagewidth;
    if (is_null($replacement)) {
        $replacement = '1200';
    }
    if ( $replacement == "100" ) {
        $css = str_replace($tag, $replacement.'%', $css);
    } else {
        $css = str_replace($tag, $replacement.'px', $css);
    }
    return $css;
}

/**
 * Displays the Font Awesome Edit Icons based on settings value
 *
 * @param string $css
 * @param mixed $autohide
 * @return string
 */
function essential_set_editicons($css, $editicons) {
    global $CFG;
    if (!empty($CFG->themedir)) {
        $editiconsurl = $CFG->themedir . '/essential/style/editicons.css'; //Pull the full path for autohide css
    } else {
        $editiconsurl = $CFG->dirroot . '/theme/essential/style/editicons.css'; //MDL-36065
    }
    $tag = '[[setting:editicons]]';
    if ($editicons) { //Setting is "YES"
        $rules = file_get_contents($editiconsurl);
        $replacement = $rules;
    } else { //Setting is "NO"
        $replacement = null; //NULL so we don't actually output anything to the stylesheet
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}


/**
 * get_performance_output() override get_peformance_info()
 *  in moodlelib.php. Returns a string
 * values ready for use.
 *
 * @return string
 */
function essential_performance_output($param) {
    
    $html = '<div class="container-fluid performanceinfo"><div class="row-fluid"><h2>Performance Information</h2></div><div class="row-fluid">';
    if (isset($param['realtime'])) { $html .= '<div class="span3"><var id="load">'.round($param['realtime'], 2).' secs</var><span>Load Time</span></div>'; }
    if (isset($param['memory_total'])) { $html .= '<div class="span3"><var id="memory">'.display_size($param['memory_total']).'</var><span>Memory Used</span></div>'; }
    if (isset($param['includecount'])) { $html .= '<div class="span3"><var id="included">'.$param['includecount'].' Files </var><span>Included</span></div>'; }
    if (isset($param['dbqueries'])) { $html .= '<div class="span3"><var id="db">'.$param['dbqueries'].' </var><span>DB Read/Write</span></div>'; }
    if ($theme->settings->perfinfo === "max") {
        $html .= '</div><hr /><div class="row-fluid"><h2>Extended Performance Information</h2></div><div class="row-fluid">';
        if (isset($param['serverload'])) { $html .= '<div class="span3"><var id="load">'.$param['serverload'].' </var><span>Server Load</span></div>'; }
        if (isset($param['memory_peak'])) { $html .= '<div class="span3"><var id="memory">'.display_size($param['memory_peak']).' </var><span>Peak Memory</span></div>'; }
        if (isset($param['cachesused'])) { $html .= '<div class="span3"><var id="cache">'.$param['cachesused'].' </var><span>Caches Used</span></div>'; }
        if (isset($param['sessionsize'])) { $html .= '<div class="span3"><var id="session">'.$param['sessionsize'].' </var><span>Session Size</span></div>'; }
    }
    $html .= '</div>';
    $html .= '</div>';

    return $html;
}

/**
 * Adds any custom CSS to the CSS before it is cached.
 *
 * @param string $css The original CSS.
 * @param string $customcss The custom CSS to add.
 * @return string The CSS which now contains our custom CSS.
 */
function essential_set_customcss($css, $customcss) {
    $tag = '[[setting:customcss]]';
    $replacement = $customcss;
    if (is_null($replacement)) {
        $replacement = '';
    }

    $css = str_replace($tag, $replacement, $css);

    return $css;
}

function theme_essential_process_css($css, $theme) {

    if (!empty($theme->settings->pagewidth)) {
       $pagewidth = $theme->settings->pagewidth;
    } else {
       $pagewidth = null;
    }
    $css = essential_set_pagewidth($css,$pagewidth);
    
    // Set the Fonts.
    if ($theme->settings->fontselect ==1) {
        $headingfont = 'Oswald';
        $bodyfont = 'PT Sans';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==2) {
        $headingfont = 'Lobster';
        $bodyfont = 'Cabin';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==3) {
        $headingfont = 'Raelway';
        $bodyfont = 'Goudy Bookletter 1911';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==4) {
        $headingfont = 'Allerta';
        $bodyfont = 'Crimson Text';
        $bodysize = '14px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==5) {
        $headingfont = 'Arvo';
        $bodyfont = 'PT Sans';
        $bodysize = '14px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==6) {
        $headingfont = 'Dancing Script';
        $bodyfont = 'Josefin Sans';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==7) {
        $headingfont = 'Allan';
        $bodyfont = 'Cardo';
        $bodysize = '14px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==8) {
        $headingfont = 'Molengo';
        $bodyfont = 'Lekton';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==9) {
        $headingfont = 'Droid Serif';
        $bodyfont = 'Droid Sans';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==10) {
        $headingfont = 'Corben';
        $bodyfont = 'Nobile';
        $bodysize = '12px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==11) {
        $headingfont = 'Ubuntu';
        $bodyfont = 'Vollkorn';
        $bodysize = '14px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==12) {
        $headingfont = 'Bree Serif';
        $bodyfont = 'Open Sans';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==13) {
        $headingfont = 'Bevan';
        $bodyfont = 'Pontano Sans';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==14) {
        $headingfont = 'Abril Fatface';
        $bodyfont = 'Average';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==15) {
        $headingfont = 'Playfair Display';
        $bodyfont = 'Multi';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==16) {
        $headingfont = 'Sansita one';
        $bodyfont = 'Kameron';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==17) {
        $headingfont = 'Istok Web';
        $bodyfont = 'Lora';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==18) {
        $headingfont = 'Pacifico';
        $bodyfont = 'Arimo';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==19) {
        $headingfont = 'Nixie One';
        $bodyfont = 'Ledger';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==20) {
        $headingfont = 'Cantata One';
        $bodyfont = 'Imprima';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==21) {
        $headingfont = 'Rancho';
        $bodyfont = 'Gudea';
        $bodysize = '13px';
        $bodyweight = '400';
    } else if ($theme->settings->fontselect ==22) {
        $headingfont = 'Helvetica';
        $bodyfont = 'Georgia';
        $bodysize = '17px';
        $bodyweight = '400';
    }
    
    $css = theme_essential_set_headingfont($css, $headingfont);
    $css = theme_essential_set_bodyfont($css, $bodyfont);
    $css = theme_essential_set_bodysize($css, $bodysize);
    $css = theme_essential_set_bodyweight($css, $bodyweight);
    
    // Set the theme color.
    if (!empty($theme->settings->themecolor)) {
        $themecolor = $theme->settings->themecolor;
    } else {
        $themecolor = null;
    }
    $css = theme_essential_set_themecolor($css, $themecolor);

    // Set the theme hover color.
    if (!empty($theme->settings->themehovercolor)) {
        $themehovercolor = $theme->settings->themehovercolor;
    } else {
        $themehovercolor = null;
    }
    $css = theme_essential_set_themehovercolor($css, $themehovercolor);
    
    // Set the footer color.
    if (!empty($theme->settings->footercolor)) {
        $footercolor = $theme->settings->footercolor;
    } else {
        $footercolor = null;
    }
    $css = theme_essential_set_footercolor($css, $footercolor);
    
    // Set the footer seperator color.
    if (!empty($theme->settings->footersepcolor)) {
        $footersepcolor = $theme->settings->footersepcolor;
    } else {
        $footersepcolor = null;
    }
    $css = theme_essential_set_footersepcolor($css, $footersepcolor);
    
    // Set the footer text color.
    if (!empty($theme->settings->footertextcolor)) {
        $footertextcolor = $theme->settings->footertextcolor;
    } else {
        $footertextcolor = null;
    }
    $css = theme_essential_set_footertextcolor($css, $footertextcolor);
    
    // Set the footer URL color.
    if (!empty($theme->settings->footerurlcolor)) {
        $footerurlcolor = $theme->settings->footerurlcolor;
    } else {
        $footerurlcolor = null;
    }
    $css = theme_essential_set_footerurlcolor($css, $footerurlcolor);
    
    // Set the footer hover color.
    if (!empty($theme->settings->footerhovercolor)) {
        $footerhovercolor = $theme->settings->footerhovercolor;
    } else {
        $footerhovercolor = null;
    }
    $css = theme_essential_set_footerhovercolor($css, $footerhovercolor);


// Set the footer heading color.
    if (!empty($theme->settings->footerheadingcolor)) {
        $footerheadingcolor = $theme->settings->footerheadingcolor;
    } else {
        $footerheadingcolor = null;
    }
    $css = theme_essential_set_footerheadingcolor($css, $footerheadingcolor);
	
     // Set the slide header color.
    if (!empty($theme->settings->slideshowcolor)) {
        $slideshowcolor = $theme->settings->slideshowcolor;
    } else {
        $slideshowcolor = null;
    }
    $css = theme_essential_set_slideshowcolor($css, $slideshowcolor);
    
     // Set the slide header color.
    if (!empty($theme->settings->slideheadercolor)) {
        $slideheadercolor = $theme->settings->slideheadercolor;
    } else {
        $slideheadercolor = null;
    }
    $css = theme_essential_set_slideheadercolor($css, $slideheadercolor);
    
     // Set the slide text color.
    if (!empty($theme->settings->slidecolor)) {
        $slidecolor = $theme->settings->slidecolor;
    } else {
        $slidecolor = null;
    }
    $css = theme_essential_set_slidecolor($css, $slidecolor);
    
     // Set the slide button color.
    if (!empty($theme->settings->slidebuttoncolor)) {
        $slidebuttoncolor = $theme->settings->slidebuttoncolor;
    } else {
        $slidebuttoncolor = null;
    }
    $css = theme_essential_set_slidebuttoncolor($css, $slidebuttoncolor);

    // Set theme alternative colors.
    $defaultalternativethemecolors = array('#a430d1', '#d15430', '#5dd130');
    $defaultalternativethemehovercolors = array('#9929c4', '#c44c29', '#53c429');

    foreach (range(1, 3) as $alternativethemenumber) {
        $default = $defaultalternativethemecolors[$alternativethemenumber - 1];
        $defaulthover = $defaultalternativethemehovercolors[$alternativethemenumber - 1];
        $css = theme_essential_set_alternativecolor($css, 'color' . $alternativethemenumber, $theme->settings->{'alternativethemecolor' . $alternativethemenumber}, $default);
        $css = theme_essential_set_alternativecolor($css, 'hovercolor' . $alternativethemenumber, $theme->settings->{'alternativethemehovercolor' . $alternativethemenumber}, $defaulthover);
    }
 
    // Set the navbar seperator.
    if (!empty($theme->settings->navbarsep)) {
        $navbarsep = $theme->settings->navbarsep;
    } else {
        $navbarsep = '/';
    }
    $css = theme_essential_set_navbarsep($css, $navbarsep);
    
    //Get the editicons value from settings
    if (!empty($theme->settings->editicons)) {
        $editicons = $theme->settings->editicons;
    } else {
        $editicons = null;
    }
    $css = essential_set_editicons($css, $editicons);
    
    // Set custom CSS.
    if (!empty($theme->settings->customcss)) {
        $customcss = $theme->settings->customcss;
    } else {
        $customcss = null;
    }
    $css = essential_set_customcss($css, $customcss);

    // Set the background image for the logo.
    $logo = $theme->setting_file_url('logo', 'logo');
    $css = theme_essential_set_logo($css, $logo);
    
    // Set the background image for the page.
    $setting = 'pagebackground';
    $pagebackground = $theme->setting_file_url($setting, $setting);
    $css = theme_essential_set_pagebackground($css, $pagebackground, $setting);
    
    // Set the Defaut Category Icon.
    if (!empty($theme->settings->defaultcategoryicon)) {
        $defaultcategoryicon = $theme->settings->defaultcategoryicon;
    } else {
        $defaultcategoryicon = null;
    }
    $css = theme_essential_set_defaultcategoryicon($css, $defaultcategoryicon);
    
    // Set Category Icons.
    foreach (range(1, 20) as $categorynumber) {
        $categoryicon = $defaultcategoryicon;
        if (!empty($theme->settings->usecategoryicon)) {
            if (!empty($theme->settings->{'categoryicon' . $categorynumber})) {
                $categoryicon = $theme->settings->{'categoryicon' . $categorynumber};
            }
        }
        $css = theme_essential_set_categoryicon($css, $categoryicon, $categorynumber);
    }
    
    // Set Slide Images.
    $setting = 'slide1image';
    if (!empty($theme->settings->slide1image)) {
        $slideimage = $theme->setting_file_url($setting, $setting);
    } else {
        $slideimage = null;
    }
    $css = theme_essential_set_slideimage($css, $slideimage, $setting);

    $setting = 'slide2image';
    if (!empty($theme->settings->slide2image)) {
        $slideimage = $theme->setting_file_url($setting, $setting);
    } else {
        $slideimage = null;
    }
    $css = theme_essential_set_slideimage($css, $slideimage, $setting);

    $setting = 'slide3image';
    if (!empty($theme->settings->slide3image)) {
        $slideimage = $theme->setting_file_url($setting, $setting);
    } else {
        $slideimage = null;
    }
    $css = theme_essential_set_slideimage($css, $slideimage, $setting);

    $setting = 'slide4image';
    if (!empty($theme->settings->slide4image)) {
        $slideimage = $theme->setting_file_url($setting, $setting);
    } else {
        $slideimage = null;
    }
    $css = theme_essential_set_slideimage($css, $slideimage, $setting);
    
    // Set Marketing Image Height.
    if (!empty($theme->settings->marketingheight)) {
        $marketingheight = $theme->settings->marketingheight;
    } else {
        $marketingheight = null;
    }
    $css = theme_essential_set_marketingheight($css, $marketingheight);
    
    // Set Marketing Images.
    $setting = 'marketing1image';
    if (!empty($theme->settings->marketing1image)) {
        $marketingimage = $theme->setting_file_url($setting, $setting);
    } else {
        $marketingimage = null;
    }
    $css = theme_essential_set_marketingimage($css, $marketingimage, $setting);
    
    $setting = 'marketing2image';
    if (!empty($theme->settings->marketing2image)) {
        $marketingimage = $theme->setting_file_url($setting, $setting);
    } else {
        $marketingimage = null;
    }
    $css = theme_essential_set_marketingimage($css, $marketingimage, $setting);
    
    $setting = 'marketing3image';
    if (!empty($theme->settings->marketing3image)) {
        $marketingimage = $theme->setting_file_url($setting, $setting);
    } else {
        $marketingimage = null;
    }
    $css = theme_essential_set_marketingimage($css, $marketingimage, $setting);

    // Set the font path.

    $css = theme_essential_set_fontwww($css);
    return $css;
}

/**
 * Adds the JavaScript for the colour switcher to the page.
 *
 * The colour switcher is a YUI moodle module that is located in
 *     theme/udemspl/yui/udemspl/udemspl.js
 *
 * @param moodle_page $page
 */
function theme_essential_initialise_colourswitcher(moodle_page $page) {
    user_preference_allow_ajax_update('theme_essential_colours', PARAM_ALPHANUM);
    $page->requires->yui_module(
        'moodle-theme_essential-coloursswitcher',
        'M.theme_essential.initColoursSwitcher',
        array(array('div' => '.dropdown-menu'))
    );
}

/**
 * Gets the theme colors the user has selected if enabled or the default if they have never changed
 *
 * @param string $default The default theme colors to use
 * @return string The theme colors the user has selected
 */
function theme_essential_get_colours($default = 'default') {
    $theme = theme_config::load('essential');
    $preference = get_user_preferences('theme_essential_colours', $default);
    foreach (range(1, 3) as $alternativethemenumber) {
        if ($preference == 'alternative' . $alternativethemenumber && !empty($theme->settings->{'enablealternativethemecolors' . $alternativethemenumber})) {
            return $preference;
        }
    }
    return $default;
}

/**
 * Checks if the user is switching colours with a refresh
 *
 * If they are this updates the users preference in the database
 */
function theme_essential_check_colours_switch() {
    $colours= optional_param('essentialcolours', null, PARAM_ALPHANUM);
    if (in_array($colours, array('default', 'alternative1', 'alternative2', 'alternative3'))) {
        set_user_preference('theme_essential_colours', $colours);
    }
}

 
function theme_essential_set_headingfont($css, $headingfont) {
    $tag = '[[setting:headingfont]]';
    $replacement = $headingfont;
    if (is_null($replacement)) {
        $replacement = 'Georgia';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_bodyfont($css, $bodyfont) {
    $tag = '[[setting:bodyfont]]';
    $replacement = $bodyfont;
    if (is_null($replacement)) {
        $replacement = 'Arial';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_bodysize($css, $bodysize) {
    $tag = '[[setting:bodysize]]';
    $replacement = $bodysize;
    if (is_null($replacement)) {
        $replacement = '13';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_bodyweight($css, $bodyweight) {
    $tag = '[[setting:bodyweight]]';
    $replacement = $bodyweight;
    if (is_null($replacement)) {
        $replacement = '400';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_themecolor($css, $themecolor) {
    $tag = '[[setting:themecolor]]';
    $replacement = $themecolor;
    if (is_null($replacement)) {
        $replacement = '#30add1';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_themehovercolor($css, $themehovercolor) {
    $tag = '[[setting:themehovercolor]]';
    $replacement = $themehovercolor;
    if (is_null($replacement)) {
        $replacement = '#29a1c4';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_alternativecolor($css, $type, $customcolor, $defaultcolor) {
    $tag = '[[setting:alternativetheme' . $type . ']]';
    $replacement = $customcolor;
    if (is_null($replacement)) {
        $replacement = $defaultcolor;
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_footercolor($css, $footercolor) {
    $tag = '[[setting:footercolor]]';
    $replacement = $footercolor;
    if (is_null($replacement)) {
        $replacement = '#000000';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_footertextcolor($css, $footertextcolor) {
    $tag = '[[setting:footertextcolor]]';
    $replacement = $footertextcolor;
    if (is_null($replacement)) {
        $replacement = '#DDDDDD';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_footerurlcolor($css, $footerurlcolor) {
    $tag = '[[setting:footerurlcolor]]';
    $replacement = $footerurlcolor;
    if (is_null($replacement)) {
        $replacement = '#BBBBBB';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_footerhovercolor($css, $footerhovercolor) {
    $tag = '[[setting:footerhovercolor]]';
    $replacement = $footerhovercolor;
    if (is_null($replacement)) {
        $replacement = '#FFFFFF';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_footerheadingcolor($css, $footerheadingcolor) {
    $tag = '[[setting:footerheadingcolor]]';
    $replacement = $footerheadingcolor;
    if (is_null($replacement)) {
        $replacement = '#CCCCCC';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_slideshowcolor($css, $slideshowcolor) {
    $tag = '[[setting:slideshowcolor]]';
    $replacement = $slideshowcolor;
    if (is_null($replacement)) {
        $replacement = '#30add1';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_slideheadercolor($css, $slideheadercolor) {
    $tag = '[[setting:slideheadercolor]]';
    $replacement = $slideheadercolor;
    if (is_null($replacement)) {
        $replacement = '#30add1';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_slidecolor($css, $slidecolor) {
    $tag = '[[setting:slidecolor]]';
    $replacement = $slidecolor;
    if (is_null($replacement)) {
        $replacement = '#888888';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_slidebuttoncolor($css, $slidebuttoncolor) {
    $tag = '[[setting:slidebuttoncolor]]';
    $replacement = $slidebuttoncolor;
    if (is_null($replacement)) {
        $replacement = '#30add1';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_footersepcolor($css, $footersepcolor) {
    $tag = '[[setting:footersepcolor]]';
    $replacement = $footersepcolor;
    if (is_null($replacement)) {
        $replacement = '#313131';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_navbarsep($css, $navbarsep) {
    $tag = '[[setting:navbarsep]]';
    $replacement = $navbarsep;
    if (is_null($replacement)) {
        $replacement = '';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_pagebackground($css, $pagebackground, $setting) {
    global $OUTPUT;
    $tag = '[[setting:pagebackground]]';
    $replacement = $pagebackground;
    $css = str_replace($tag, $replacement, $css);
    return $css;
}


function theme_essential_set_slideimage($css, $slideimage, $setting) {
    global $OUTPUT;
    $tag = '[[setting:'.$setting.']]';
    $replacement = $slideimage;
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_marketingheight($css, $marketingheight) {
    $tag = '[[setting:marketingheight]]';
    $replacement = $marketingheight;
    if (is_null($replacement)) {
        $replacement = 100;
    }
    $css = str_replace($tag, $replacement.'px', $css);
    return $css;
}

function theme_essential_set_marketingimage($css, $marketingimage, $setting) {
    $tag = '[[setting:'.$setting.']]';
    $replacement = $marketingimage;
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_defaultcategoryicon($css, $defaultcategoryicon) {
    $tag = '[[setting:defaultcategoryicon]]';
    $replacement = $defaultcategoryicon;
    if (is_null($replacement)) {
        $replacement = 'f07c';
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_set_categoryicon($css, $categoryicon, $categorynumber) {
    $tag = '[[setting:categoryicon'. $categorynumber.']]';
    $replacement = $categoryicon;
    
    if (is_null($replacement)) {
        $replacement = $defaultcategoryicon;
    }
    $css = str_replace($tag, $replacement, $css);
    return $css;
}

function theme_essential_page_init(moodle_page $page) {
    $page->requires->jquery();
    $page->requires->jquery_plugin('cslider', 'theme_essential');
    $page->requires->jquery_plugin('custom', 'theme_essential'); 
    $page->requires->jquery_plugin('alert', 'theme_essential');
    $page->requires->jquery_plugin('carousel', 'theme_essential');
    $page->requires->jquery_plugin('collapse', 'theme_essential');
    $page->requires->jquery_plugin('modal', 'theme_essential');
    $page->requires->jquery_plugin('scrollspy', 'theme_essential');
    $page->requires->jquery_plugin('tab', 'theme_essential');
    $page->requires->jquery_plugin('tooltip', 'theme_essential');
    $page->requires->jquery_plugin('transition', 'theme_essential');
    $page->requires->jquery_plugin('modernizr', 'theme_essential');  
}