<?php namespace HashOver;

// Copyright (C) 2015-2021 Jacob Barkdull
// This file is part of HashOver.
//
// HashOver is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// HashOver is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with HashOver.  If not, see <http://www.gnu.org/licenses/>.


// Check if request is for JSONP
if (isset ($_GET['jsonp'])) {
	// If so, setup HashOver for JavaScript
	require ('javascript-setup.php');

	// Get data from GET request
	$request = $_GET;
} else {
	// If not, setup HashOver for JSON
	require ('json-setup.php');

	// Get data from POST request
	$request = $_POST;
}

// Converts a file name (1-2) to a permalink (hashover-c1r1)
function file_permalink ($file)
{
	return 'hashover-c' . str_replace ('-', 'r', $file);
}

// Handles posted comment data
function display_json (\HashOver $hashover, FormData $form_data, $data)
{
	// Check if request is HTTP
	if ($form_data->viaAJAX === false) {
		// If so, convert file to permalink
		$permalink = file_permalink ($data['file']);

		// And redirect to comment
		return $form_data->kickback ($permalink);
	}

	// Otherwise, split file into parts
	$key_parts = explode ('-', $data['file']);

	// Parse comment data
	$parsed = $hashover->commentParser->parse (
		$data['comment'], $data['file'], $key_parts
	);

	// Add page URL, thread, and title to comment data
	$parsed['url'] = $hashover->setup->pageURL;
	$parsed['thread'] = $hashover->setup->threadName;
	$parsed['title'] = $hashover->setup->pageTitle;

	// And return JSON or JSONP function call
	return Misc::jsonData (array (
		// Current comment count
		'count' => $hashover->getCommentCount (),

		// Parsed comment data
		'comment' => $parsed
	));
}

try {
	// Instantiate HashOver class
	$hashover = new \HashOver ('json');

	// Throw exception if requested by remote server
	$hashover->setup->refererCheck ();

	// Load user settings
	$hashover->setup->loadFrontendSettings ();

	// Set page URL from POST/GET data
	$hashover->setup->setPageURL ('request');

	// Set page title from POST/GET data
	$hashover->setup->setPageTitle ('request');

	// Set thread name from POST/GET data
	$hashover->setup->setThreadName ('request');

	// Instantiate FormData class
	$form_data = new FormData ($hashover->setup, $hashover->cookies);

	// Handle user login
	if (isset ($request['login'])) {
		// Log the user in
		$hashover->login->setLogin ();

		// Kick visitor back if told to
		$form_data->displayMessage ('logged-in');
	}

	// Handle user logout
	if (isset ($request['logout'])) {
		// Log the user out
		$hashover->login->clearLogin ();

		// Kick visitor back
		$form_data->displayMessage ('logged-out');
	}

	// Initiate and finalize comment processing
	$hashover->initiate ();
	$hashover->finalize ();

	// Instantiate class for writing and editing comments
	$write_comments = new WriteComments (
		$hashover->setup,
		$form_data,
		$hashover->thread,
		$hashover->login
	);

	// Decide SPAM check mode
	$mode = $form_data->viaAJAX ? 'javascript' : 'php';

	// Handle new comment post
	if (isset ($request['post'])) {
		// Check IP address for spam
		$form_data->checkForSpam ($mode);

		// Save posted comment
		$data = $write_comments->postComment ();

		// Create/update page metadata
		$hashover->defaultMetadata ();

		// Check if comment saved successfully
		if (!empty ($data)) {
			// If so, display comment as JSON data
			echo display_json ($hashover, $form_data, $data);
		} else {
			// If not, redirect to failure message
			$form_data->displayMessage ('post-fail');
		}
	}

	// Handle comment edit
	if (isset ($request['edit'])) {
		// Check IP address for spam
		$form_data->checkForSpam ($mode);

		// Save edited comment
		$data = $write_comments->editComment ();

		// Check if edited comment saved successfully
		if (!empty ($data)) {
			// If so, display comment as JSON data
			echo display_json ($hashover, $form_data, $data);
		} else {
			// If not, redirect to failure message
			$form_data->displayMessage ('post-fail');
		}
	}

	// Handle comment deletion
	if (isset ($request['delete'])) {
		// Check IP address for spam
		$form_data->checkForSpam ($mode);

		// Attempt to delete comment
		$deleted = $write_comments->deleteComment ();

		// Check if comment was deleted successfully
		if ($deleted === true) {
			// If so, redirect to deletion message
			$form_data->displayMessage ('comment-deleted');
		} else {
			// If not, redirect to failure message
			$form_data->displayMessage ('post-fail');
		}
	}
} catch (\Exception $error) {
	echo Misc::displayException ($error, 'json');
}