Schema for News feed - need to order posts based on a composite score

gistfile1.txt

I am building a content platform and have a Laravel API for my news feed (infinite-scrolling feed like the Linkedin feed, Facebook feed, etc). I need to order the posts in my news feed based on the algorithm below (each parameter is going to have a weight, and I want to use these to calculate and order the results / Posts by the composite score).

                    Parameters for algorithm:
                    Num Comments
                    Num Likes
                    Date Created (Recency of Post)
                    Date Updated (Recency of Post)
                    Date last comment (Recency of Comments)
                    Date last like / reaction (Recency of Likes / Reactions)
                    Length of Post?
                    Fast Rising: Number of likes / comments in past X <hours / days>

The DB structure looks like this:
Post hasMany Comments
Post HasMany Reactions ('likes')

The schema is below. How can you do an OrderBy in Laravel based on 
1. a composite score or combined metric from multiple columns 
2. values from related tables (comments, reactions)
(like what I am trying to do here)?
# Dump of table posts
# ------------------------------------------------------------

DROP TABLE IF EXISTS `posts`;

CREATE TABLE `posts` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `title` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `slug` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `description` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `body` longtext COLLATE utf8mb4_unicode_ci NOT NULL,
  `featured_image_caption` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `is_pinned` tinyint(1) DEFAULT '0',
  `reading_time_minutes` int(11) DEFAULT NULL,
  `canonical_url` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `status` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `is_removed_by_admin` tinyint(1) DEFAULT '0',
  `removal_reason` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `num_comments` int(11) NOT NULL,
  `num_likes` int(11) NOT NULL,
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  `deleted_at` timestamp NULL DEFAULT NULL,
  `author_id` int(10) unsigned NOT NULL,
  PRIMARY KEY (`id`),
  KEY `author_fk_272473` (`author_id`),
  CONSTRAINT `author_fk_272473` FOREIGN KEY (`author_id`) REFERENCES `users` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;


DROP TABLE IF EXISTS `comments`;

CREATE TABLE `comments` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `comment_on_type` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `body` longtext COLLATE utf8mb4_unicode_ci NOT NULL,
  `is_removed` tinyint(1) DEFAULT '0',
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  `deleted_at` timestamp NULL DEFAULT NULL,
  `user_id` int(10) unsigned NOT NULL,
  `comment_on_post_id` int(10) unsigned DEFAULT NULL,
  `comment_on_comment_id` int(10) unsigned DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `user_fk_369255` (`user_id`),
  KEY `comment_on_post_fk_376132` (`comment_on_post_id`),
  KEY `comment_on_comment_fk_376133` (`comment_on_comment_id`),
  CONSTRAINT `comment_on_comment_fk_376133` FOREIGN KEY (`comment_on_comment_id`) REFERENCES `comments` (`id`),
  CONSTRAINT `comment_on_post_fk_376132` FOREIGN KEY (`comment_on_post_id`) REFERENCES `posts` (`id`),
  CONSTRAINT `user_fk_369255` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;


# Dump of table reactions
# ------------------------------------------------------------

DROP TABLE IF EXISTS `reactions`;

CREATE TABLE `reactions` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `reaction_type` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `is_removed` tinyint(1) DEFAULT '0',
  `reaction_to_type` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  `deleted_at` timestamp NULL DEFAULT NULL,
  `user_id` int(10) unsigned NOT NULL,
  `reaction_to_post_id` int(10) unsigned DEFAULT NULL,
  `reaction_to_comment_id` int(10) unsigned DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `user_fk_369186` (`user_id`),
  KEY `reaction_to_post_fk_376403` (`reaction_to_post_id`),
  KEY `reaction_to_comment_fk_376404` (`reaction_to_comment_id`),
  CONSTRAINT `reaction_to_comment_fk_376404` FOREIGN KEY (`reaction_to_comment_id`) REFERENCES `comments` (`id`),
  CONSTRAINT `reaction_to_post_fk_376403` FOREIGN KEY (`reaction_to_post_id`) REFERENCES `posts` (`id`),
  CONSTRAINT `user_fk_369186` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;


DROP TABLE IF EXISTS `users`;

CREATE TABLE `users` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `email` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `email_verified_at` datetime DEFAULT NULL,
  `password` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `remember_token` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  `deleted_at` timestamp NULL DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;