From fa79d503add4a42ece921050b161224ce18fa391 Mon Sep 17 00:00:00 2001
From: aB0t <robot@vdm.io>
Date: Thu, 22 Jun 2023 08:54:55 +0200
Subject: [PATCH] update 2023-06-22 08:54:55

---
 .../README.md                                 | 21 +++++++++
 .../code.php                                  | 46 +++++++++++++++++++
 .../code.power                                | 46 +++++++++++++++++++
 3 files changed, 113 insertions(+)

diff --git a/src/f815fb33-f721-48a5-a84e-53f1986e8881/README.md b/src/f815fb33-f721-48a5-a84e-53f1986e8881/README.md
index 8b486c6..3145f75 100644
--- a/src/f815fb33-f721-48a5-a84e-53f1986e8881/README.md
+++ b/src/f815fb33-f721-48a5-a84e-53f1986e8881/README.md
@@ -23,6 +23,8 @@ class Watcher << (F,LightGreen) >> #Green {
   # ?object $verse
   + __construct(Load $load, Insert $insert, ...)
   + api(string $translation, int $book, ...) : bool
+  + next(string $translation, int $book, ...) : ?int
+  + previous(int $chapter) : ?int
   - translation(string $translation) : ?string
   - book(string $translation, int $book) : ?string
   - chapter(string $translation, int $book, ...) : ?string
@@ -61,6 +63,25 @@ note left of Watcher::api
     int $chapter
 end note
 
+note right of Watcher::next
+  Get the next chapter
+
+  since: 2.0.1
+  return: ?int
+  
+  arguments:
+    string $translation
+    int $book
+    int $chapter
+end note
+
+note left of Watcher::previous
+  Get the previous chapter
+
+  since: 2.0.1
+  return: ?int
+end note
+
 note right of Watcher::translation
   Get Translation Hash Value
 
diff --git a/src/f815fb33-f721-48a5-a84e-53f1986e8881/code.php b/src/f815fb33-f721-48a5-a84e-53f1986e8881/code.php
index f1856bf..91d57de 100644
--- a/src/f815fb33-f721-48a5-a84e-53f1986e8881/code.php
+++ b/src/f815fb33-f721-48a5-a84e-53f1986e8881/code.php
@@ -200,6 +200,52 @@ final class Watcher
 		return false;
 	}
 
+	/**
+	 * Get the next chapter
+	 *
+	 * @param   string  $translation  The translation.
+	 * @param   int     $book         The book number.
+	 * @param   int     $chapter      The chapter number.
+	 *
+	 * @return  int|null   Number if there is a next, else null
+	 * @since   2.0.1
+	 */
+	public function next(string $translation, int $book, int $chapter): ?int
+	{
+		// we load the next chapter
+		$next = $chapter + 1;
+		// check if this books has this next chapter
+		if (!$this->fresh && ($chapter_sha = $this->load->value(
+				['abbreviation' => $translation, 'book_nr' => $book, 'chapter' => $next],
+				'sha', 'chapter'
+			)) !== null)
+		{
+			return $next;
+		}
+
+		return null;
+	}
+
+	/**
+	 * Get the previous chapter
+	 *
+	 * @param   int     $chapter      The chapter number.
+	 *
+	 * @return  int|null   Number if there is a previous, else null
+	 * @since   2.0.1
+	 */
+	public function previous(int $chapter): ?int
+	{
+		// we load the previous chapter
+		$previous = $chapter - 1;
+		if (!$this->fresh && $previous > 0)
+		{
+			return $previous;
+		}
+
+		return null;
+	}
+
 	/**
 	 * Get Translation Hash Value
 	 *
diff --git a/src/f815fb33-f721-48a5-a84e-53f1986e8881/code.power b/src/f815fb33-f721-48a5-a84e-53f1986e8881/code.power
index 61b76c8..abc307b 100644
--- a/src/f815fb33-f721-48a5-a84e-53f1986e8881/code.power
+++ b/src/f815fb33-f721-48a5-a84e-53f1986e8881/code.power
@@ -169,6 +169,52 @@
 		return false;
 	}
 
+	/**
+	 * Get the next chapter
+	 *
+	 * @param   string  $translation  The translation.
+	 * @param   int     $book         The book number.
+	 * @param   int     $chapter      The chapter number.
+	 *
+	 * @return  int|null   Number if there is a next, else null
+	 * @since   2.0.1
+	 */
+	public function next(string $translation, int $book, int $chapter): ?int
+	{
+		// we load the next chapter
+		$next = $chapter + 1;
+		// check if this books has this next chapter
+		if (!$this->fresh && ($chapter_sha = $this->load->value(
+				['abbreviation' => $translation, 'book_nr' => $book, 'chapter' => $next],
+				'sha', 'chapter'
+			)) !== null)
+		{
+			return $next;
+		}
+
+		return null;
+	}
+
+	/**
+	 * Get the previous chapter
+	 *
+	 * @param   int     $chapter      The chapter number.
+	 *
+	 * @return  int|null   Number if there is a previous, else null
+	 * @since   2.0.1
+	 */
+	public function previous(int $chapter): ?int
+	{
+		// we load the previous chapter
+		$previous = $chapter - 1;
+		if (!$this->fresh && $previous > 0)
+		{
+			return $previous;
+		}
+
+		return null;
+	}
+
 	/**
 	 * Get Translation Hash Value
 	 *