88 lines
2.6 KiB
PHP
88 lines
2.6 KiB
PHP
<?php
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$bot_api = require('api_key.php');
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$chat_id = -1001180504638;
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$mysql = require('mysql_credentials.php');
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$conn = new mysqli($mysql['servername'], $mysql['username'], $mysql['password'], $mysql['database']);
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if ($conn->connect_error) {
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die("Connection failed: " . $conn->connect_error);
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}
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# Sends the given text wrapped in triple backticks as Markdown.
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function send_code($post_message) {
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global $bot_api;
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global $chat_id;
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$url = 'https://api.telegram.org/bot' . $bot_api . '/sendMessage';
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$post_msg = array('chat_id' => $chat_id, 'text' => '```\n ' . $post_message . '```', 'parse_mode' => 'markdown' );
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$options = array(
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'http' => array(
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'header' => "Content-type: application/x-www-form-urlencoded\r\n",
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'method' => 'POST',
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'content' => http_build_query($post_msg)
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)
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);
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$context = stream_context_create($options);
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$result = file_get_contents($url, false, $context);
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}
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# Takes a user array as input. Checks who follows him/her and adds
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# him/her to $output array. Exits when a user is followed by no one.
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function get_chain_from_user($user) {
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global $conn;
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$output = array($user);
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$last_user_id = $user['user_id'];
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while (true) {
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$query = "SELECT user_id, username from users where follows = $last_user_id";
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$result = $conn->query($query);
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if ($result->num_rows > 0){
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# Code executed if this isn't the last user
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$details = $result->fetch_assoc();
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array_push($output, $details );
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$last_user_id = $details['user_id'];
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}
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else {
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break;
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}
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}
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return $output;
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}
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# First generates a list of people not following anyone (end_points)
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# Then runs get_chain_from_user on all of them and stores them in
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# $chains array. Then compares the arrays inside $chains array and
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# returns the longest one.
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function get_longest_chain() {
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global $conn;
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$query = "SELECT user_id, username FROM users WHERE follows = -1;";
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$end_points = $conn->query($query);
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if ($end_points->num_rows == 0) {
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return array();
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}
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$chains = array();
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while ($end_point = $end_points->fetch_assoc()){
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$chain = get_chain_from_user($end_points);
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array_push($chains, $chain);
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}
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$longest_chain_index = 0;
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for ($i = 0; $i < count($chains); $i++){
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if (count($chains[$i]) > count($chains[$longest_chain_index])) {
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$longest_chain_index = $i;
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}
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}
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return $chains[$longest_chain_index];
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}
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# Converts chain to string for sending
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function chain_to_string($chain) {
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$string = "";
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for ($i = count($chain) - 1; $i >= 0 ; $i--) {
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$string .= $chain[$i]['username'];
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if ($i != 0) {
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$string .= " > ";
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}
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}
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return $string;
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}
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$conn->close();
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?>
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