From 1ea3da1db6c5291abfbd99aa8f5f7e28de8ed9ed Mon Sep 17 00:00:00 2001
From: 8chan <admin@8chan.co>
Date: Sun, 10 Aug 2014 14:51:45 +0000
Subject: [PATCH] Merge Barrucadu/diceroll into master

---
 inc/config.php    |  4 ++++
 inc/functions.php | 61 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+)

diff --git a/inc/config.php b/inc/config.php
index 91e53a6d..802a1471 100644
--- a/inc/config.php
+++ b/inc/config.php
@@ -549,6 +549,10 @@
 		'eu' => 'Europe'
 	);
 	*/
+
+	// Allow dice rolling: an email field of the form "dice XdY+/-Z" will result in X Y-sided dice rolled and summed,
+	// with the modifier Z added, with the result displayed at the top of the post body.
+	$config['allow_roll'] = false;
 	
 /*
 * ====================
diff --git a/inc/functions.php b/inc/functions.php
index af2136bb..24ec3863 100644
--- a/inc/functions.php
+++ b/inc/functions.php
@@ -243,6 +243,9 @@ function loadConfig() {
 	if (is_array($config['anonymous']))
 		$config['anonymous'] = $config['anonymous'][array_rand($config['anonymous'])];
 
+	if ($config['allow_roll'])
+		event_handler('post', 'diceRoller');
+
 	event('load-config');
 	
 	if ($config['debug']) {
@@ -2323,3 +2326,61 @@ function shell_exec_error($command, $suppress_stdout = false) {
 
 	return $return === 'TB_SUCCESS' ? false : $return;
 }
+
+/* Die rolling:
+ * If "dice XdY+/-Z" is in the email field (where X or +/-Z may be
+ * missing), X Y-sided dice are rolled and summed, with the modifier Z
+ * added on.  The result is displayed at the top of the post.
+ */
+function diceRoller($post) {
+	if(strpos(strtolower($post->email), 'dice%20') === 0) {
+		$dicestr = str_split(substr($post->email, strlen('dice%20')));
+
+		// Get params
+		$diceX = '';
+		$diceY = '';
+		$diceZ = '';
+
+		$curd = 'diceX';
+		for($i = 0; $i < count($dicestr); $i ++) {
+			if(is_numeric($dicestr[$i])) {
+				$$curd .= $dicestr[$i];
+			} else if($dicestr[$i] == 'd') {
+				$curd = 'diceY';
+			} else if($dicestr[$i] == '-' || $dicestr[$i] == '+') {
+				$curd = 'diceZ';
+				$$curd = $dicestr[$i];
+			}
+		}
+
+		// Default values for X and Z
+		if($diceX == '') {
+			$diceX = '1';
+		}
+
+		if($diceZ == '') {
+			$diceZ = '+0';
+		}
+
+		// Intify them
+		$diceX = intval($diceX);
+		$diceY = intval($diceY);
+		$diceZ = intval($diceZ);
+
+		// Continue only if we have valid values
+		if($diceX > 0 && $diceY > 0) {
+			$dicerolls = array();
+			$dicesum = $diceZ;
+			for($i = 0; $i < $diceX; $i++) {
+				$roll = rand(1, $diceY);
+				$dicerolls[] = $roll;
+				$dicesum += $roll;
+			}
+
+			// Prepend the result to the post body
+			$modifier = ($diceZ != 0) ? ((($diceZ < 0) ? ' - ' : ' + ') . abs($diceZ)) : '';
+			$dicesum = ($diceX > 1) ? ' = ' . $dicesum : '';
+			$post->body = 'Rolled ' . implode(', ', $dicerolls) . $modifier . $dicesum . '<br/>' . $post->body;
+		}
+	}
+}