. /** * Fbcomments block class. * * @package block_fbcomments * @copyright 2013 onwards Ankit Agarwal * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ class block_fbcomments extends block_base { /** @const string order by constants. (used for comments ordering) */ const ORDER_SOCIAL = 'social'; /** @const string order by constants. (used for comments ordering) */ const ORDER_TIME = 'time'; /** @const string order by constants. (used for comments ordering) */ const ORDER_REVERSE_TIME = 'reverse_time'; /** @const int enable like button. */ const BUTTON_ENABLE_LIKE = 1; /** @const int enable recommend button.*/ const BUTTON_ENABLE_RECOMMEND = 2; /** @const int disable all buttons. */ const BUTTON_DISABLE_ALL = 0; public function __construct() { $this->title = get_string('pluginname', 'block_fbcomments'); } public function has_config() { return false; } public function applicable_formats() { return array('all' => true); } public function specialization() { $this->title = isset($this->config->title) ? format_string($this->config->title) : format_string(get_string('newfbblock', 'block_fbcomments')); } public function instance_allow_multiple() { return false; } public function get_content() { global $CFG; if (!empty($this->config->appid) && !empty($this->config->enablecomment)) { $meta = html_writer::tag("meta", "", array("property" => "fb:app_id", "content" => $this->config->appid)); if (empty ($CFG->additionalhtmlhead)) { $CFG->additionalhtmlhead = ''; } // Moodle creates a instance of block multiple times in every page, not sure why. if (strpos($CFG->additionalhtmlhead, $meta) === false) { $CFG->additionalhtmlhead .= $meta; } } if ($this->content !== null) { return $this->content; } $fblike = null; $fbcomment = null; $this->content = new stdClass(); // Config wont be set if block is just added. if (!empty($this->config->urltype)) { switch ($this->config->urltype) { case 4 : $url = $this->get_mod_url(); break; case 3 : $url = $this->get_course_url(); break; case 2 : $url = new moodle_url($CFG->wwwroot); break; case 1 : default : $url = $this->page->url; break; } } else { // No point going any further. return ''; } $url = $url->out(true); $this->content->text = '

'; $jscode = $this->get_fb_js(); $this->page->requires->js_init_code($jscode); $color = $this->config->colorscheme; $attr = 'data-href="'.$url.'" colorscheme="'.$color.'"'; $this->content->text .= $this->get_like_share_button($attr); // Add like/share button if needed. $this->content->text .= $this->get_comments_box($attr); // Add comments block. return $this->content; } /** * Return course url, which current page belongs to. * * @return moodle_url */ public function get_course_url() { $context = $this->context->get_course_context(); return $url = new moodle_url($context->get_url()); } /** * Return mod url, which current page belongs to. * * @return moodle_url */ public function get_mod_url() { // Context of the page holding the block. $context = $this->page->context; return $url = new moodle_url($context->get_url()); } /** * The block should only be dockable when the title of the block is not empty * and when parent allows docking. * * @return bool */ public function instance_can_be_docked() { return (!empty($this->config->title) && parent::instance_can_be_docked()); } /** * Returns a list of allowed order-by parameters. * * @return array */ public static function get_order_by_options() { $arr = array( self::ORDER_SOCIAL => get_string(self::ORDER_SOCIAL, 'block_fbcomments'), self::ORDER_TIME => get_string(self::ORDER_TIME, 'block_fbcomments'), self::ORDER_REVERSE_TIME => get_string(self::ORDER_REVERSE_TIME, 'block_fbcomments') ); return $arr; } /** * Returns a list of allowed order-by parameters. * * @return array */ public static function get_button_options() { $arr = array( self::BUTTON_DISABLE_ALL => get_string('disable'), self::BUTTON_ENABLE_LIKE => get_string('buttonlike', 'block_fbcomments'), self::BUTTON_ENABLE_RECOMMEND => get_string('buttonrecommend', 'block_fbcomments') ); return $arr; } /** * Get Facebook js code. * * @return string */ protected function get_fb_js() { return '(function(d, s, id) { var js, fjs = d.getElementsByTagName(s)[0]; if (d.getElementById(id)) return; js = d.createElement(s); js.id = id; js.src = "//connect.facebook.net/en_US/all.js#xfbml=1"; fjs.parentNode.insertBefore(js, fjs); }(document, "script", "facebook-jssdk"));'; } /** * Get html for Facebook like and share button if enabled. * * @param string $attr Attributes to add to the like and share button. * * @return string HTML code for the like button. */ protected function get_like_share_button($attr = '') { if (!empty($this->config->enablelike)) { $likeattr = 'data-send="false" data-show-faces="false"'; if ($this->config->enablelike == 1) { // Like button. $likeattr .= ' data-action="like"'; } else { // Recommend button. $likeattr .= ' data-action="recommend"'; } // Add a share button if specified. if (!empty($this->config->enableshare)) { $likeattr .= ' data-share="true"'; } return "

"; } return ''; } /** * Get html for Facebook comments box if enabled. * * @param string $attr Attributes to add to the comments box. * * @return string HTML code for the comments box. */ protected function get_comments_box($attr = '') { if (!empty($this->config->enablecomment)) { if (empty($this->config->numposts)) { $this->config->numposts = 10; } $commentattr = 'data-num-posts="'.$this->config->numposts.'"'; if (empty($this->config->commentorder)) { $this->config->commentorder = self::ORDER_SOCIAL; } $commentattr .= 'data-order-by="'.$this->config->commentorder.'"'; return "

"; } return ''; } }