<?php

include_once 'Thread.php';

class Category {
	public $id = 0;
	public $name = 'Unknown';
	public $description = 'This category does not exist';
	public $thread_count = 0;
	public $post_count = 0;

	function get_from_database($id, $dbc) {
		$sql = "SELECT cat_name, cat_description, cat_thread_count, cat_post_count FROM categories WHERE cat_id = " . mysqli_real_escape_string($dbc, $id);
		$result = mysqli_query($dbc, $sql);
	
		if (!$result) {
			echo 'Failed to get category: ' . mysqli_error($dbc);
		}
	
		if (mysqli_num_rows($result) == 0) {
			return 0;
		} else {
			while ($row = mysqli_fetch_assoc($result)) {
				$this->id = $id;
				$this->name = $row['cat_name'];
				$this->description = $row['cat_description'];
				$this->thread_count = $row['cat_thread_count'];
				$this->post_count = $row['cat_post_count'];
			}
		}
	
		mysqli_free_result($result);
		return 1;
	}

	function get_threads($dbc) {
		$sql = "SELECT thread_id FROM threads WHERE thread_category = " . $this->id . " ORDER BY thread_date_lastpost";
		$result = mysqli_query($dbc, $sql);
	
		if (!$result) {
			echo 'Could not get threads from category: ' . mysqli_error($dbc);
		}
	
		$threads = array();

		if (mysqli_num_rows($result) == 0) {
		} else {
			while ($row = mysqli_fetch_assoc($result)) {
				$thread = new Thread();
				$thread->get_from_database($row['thread_id'], $dbc);
				array_push($threads, $thread);
			}
		}

		mysqli_free_result($result);
		return $threads;
	}

	function get_latest_thread($dbc) {
		$sql = "SELECT thread_id FROM threads WHERE thread_category = " . $this->id . " ORDER BY thread_date_lastpost DESC LIMIT 1";
		$result = mysqli_query($dbc, $sql);
	
		if (!$result) {
			echo 'Could not get thread from category: ' . mysqli_error($dbc);
		}
	
		$thread = null;
		
		if (mysqli_num_rows($result) == 0) {
		} else {
			while ($row = mysqli_fetch_assoc($result)) {
				$thread = new Thread();
				$thread->get_from_database($row['thread_id'], $dbc);
			}
		}

		mysqli_free_result($result);
		return $thread;
	}
}

function get_all_categories($dbc) {
	$sql = "SELECT cat_id FROM categories";
	$result = mysqli_query($dbc, $sql);
	
	if (!$result) {
		echo 'Failed to get categories: ' . mysqli_error($dbc);
	}

	$categories = array();

	if (mysqli_num_rows($result) == 0) {
	} else {
		while ($row = mysqli_fetch_assoc($result)) {
			$category = new Category();
			$category->get_from_database($row['cat_id'], $dbc);
			array_push($categories, $category);
		}
	}

	mysqli_free_result($result);
	return $categories;
}