<?php

/*
    tag.php

    MediaWiki API Demos
    Demo of `Tag` module: Remove the spam tag from log entry ID 123 with the reason Wrongly 
    applied

    MIT license
*/
$endPoint = "https://test.wikipedia.org/w/api.php";

$login_Token = getLoginToken(); // Step 1
loginRequest( $login_Token ); // Step 2
$csrf_Token = getCSRFToken(); // Step 3
stashEdit( $csrf_Token ); // Step 4

// Step 1: GET request to fetch login token
function getLoginToken() {
	global $endPoint;

	$params1 = [
		"action" => "query",
		"meta" => "tokens",
		"type" => "login",
		"format" => "json"
	];

	$url = $endPoint . "?" . http_build_query( $params1 );

	$ch = curl_init( $url );
	curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
	curl_setopt( $ch, CURLOPT_COOKIEJAR, "cookie.txt" );
	curl_setopt( $ch, CURLOPT_COOKIEFILE, "cookie.txt" );

	$output = curl_exec( $ch );
	curl_close( $ch );

	$result = json_decode( $output, true );
	return $result["query"]["tokens"]["logintoken"];
}

// Step 2: POST request to log in. Use of main account for login is not
// supported. Obtain credentials via Special:BotPasswords
// (https://www.mediawiki.org/wiki/Special:BotPasswords) for lgname & lgpassword
function loginRequest( $logintoken ) {
	global $endPoint;

	$params2 = [
		"action" => "login",
		"lgname" => "bot_user_name",
		"lgpassword" => "bot_password",
		"lgtoken" => $logintoken,
		"format" => "json"
	];

	$ch = curl_init();

	curl_setopt( $ch, CURLOPT_URL, $endPoint );
	curl_setopt( $ch, CURLOPT_POST, true );
	curl_setopt( $ch, CURLOPT_POSTFIELDS, http_build_query( $params2 ) );
	curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
	curl_setopt( $ch, CURLOPT_COOKIEJAR, "cookie.txt" );
	curl_setopt( $ch, CURLOPT_COOKIEFILE, "cookie.txt" );

	$output = curl_exec( $ch );
	curl_close( $ch );
}

// Step 3: GET request to fetch CSRF token
function getCSRFToken() {
	global $endPoint;

	$params3 = [
		"action" => "query",
		"meta" => "tokens",
		"format" => "json"
	];

	$url = $endPoint . "?" . http_build_query( $params3 );

	$ch = curl_init( $url );

	curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
	curl_setopt( $ch, CURLOPT_COOKIEJAR, "cookie.txt" );
	curl_setopt( $ch, CURLOPT_COOKIEFILE, "cookie.txt" );

	$output = curl_exec( $ch );
	curl_close( $ch );

	$result = json_decode( $output, true );
	return $result["query"]["tokens"]["csrftoken"];
}

// Step 4: Send a POST request  to remove the spam tag from log entry ID 123 
// with the reason Wrongly applied
function stashEdit( $csrftoken ) {
	global $endPoint;
	
	$params4 = [
		"action" => "tag",
		"format" => "json",
                "token" => $csrftoken,
                "logid" => "123",
                "remove" => "spam",
                "reason" => "Wrongly applied"

	];
  
	$ch = curl_init();

	curl_setopt( $ch, CURLOPT_URL, $endPoint );
	curl_setopt( $ch, CURLOPT_POST, true );
	curl_setopt( $ch, CURLOPT_POSTFIELDS, http_build_query( $params4 ) );
	curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
	curl_setopt( $ch, CURLOPT_COOKIEJAR, "cookie.txt" );
	curl_setopt( $ch, CURLOPT_COOKIEFILE, "cookie.txt" );

	$response = curl_exec($ch);
	curl_close($ch);

	echo ($response);
}