delete bookmark by index

assets/lum-marker.json

@@ -1 +1 @@
-{"owner":"admin","created_at":1714182655,"bookmarks":[{"title":"Hyouka - Saint Pepsi","link":"https://www.youtube.com/watch?v=SpQCuPTWrrI"},{"title":"【original anime MV】SHINKIRO【hololive/宝鐘マリン・Gawr Gura】","link":"https://www.youtube.com/watch?v=9ehwhQJ50gs"},{"title":"【MV】Lucky☆Orb feat. Hatsune Miku by emon(Tes.) / ラッキー☆オーブ feat. 初音ミク by emon(Tes.) 【MIKU EXPO 5th】","link":"https://www.youtube.com/watch?v=AufydOsiD6M"},{"title":"[Ochame Kinou] hololive Fukkireta Chorus [24 VTubers]","link":"https://www.youtube.com/watch?v=9kQ2GtvDV3s"},{"title":"【MV】White Love／SPEED (Cover)【FUWAMOCO】","link":"https://www.youtube.com/watch?v=D8YflSQi1Vk"},{"title":"Re:Zero ED / Ending 2 Full『Emilia (Rie Takahashi) - Stay Alive』【ENG Sub】","link":"https://www.youtube.com/watch?v=z-NuxWkYtlI"},{"title":"arrays and vectors in rust (btw)","link":"https://www.cs.brandeis.edu/~cs146a/rust/doc-02-21-2015/book/arrays-vectors-and-slices.html"},{"title":"lambda expressions","link":"https://www.gnu.org/software/emacs/manual/html_node/eintr/lambda.html"}]}
+{"owner":"admin","created_at":1714182655,"bookmarks":[{"title":"Hyouka - Saint Pepsi","link":"https://www.youtube.com/watch?v=SpQCuPTWrrI"},{"title":"【original anime MV】SHINKIRO【hololive/宝鐘マリン・Gawr Gura】","link":"https://www.youtube.com/watch?v=9ehwhQJ50gs"},{"title":"【MV】Lucky☆Orb feat. Hatsune Miku by emon(Tes.) / ラッキー☆オーブ feat. 初音ミク by emon(Tes.) 【MIKU EXPO 5th】","link":"https://www.youtube.com/watch?v=AufydOsiD6M"},{"title":"[Ochame Kinou] hololive Fukkireta Chorus [24 VTubers]","link":"https://www.youtube.com/watch?v=9kQ2GtvDV3s"},{"title":"【MV】White Love／SPEED (Cover)【FUWAMOCO】","link":"https://www.youtube.com/watch?v=D8YflSQi1Vk"},{"title":"Re:Zero ED / Ending 2 Full『Emilia (Rie Takahashi) - Stay Alive』【ENG Sub】","link":"https://www.youtube.com/watch?v=z-NuxWkYtlI"},{"title":"arrays and vectors in rust (btw)","link":"https://www.cs.brandeis.edu/~cs146a/rust/doc-02-21-2015/book/arrays-vectors-and-slices.html"},{"title":"lambda expressions","link":"https://www.gnu.org/software/emacs/manual/html_node/eintr/lambda.html"}]}

src/main.rs

@@ -175,19 +175,81 @@ fn view_bookmarks() {
 
             println!("Bookmarks for {}: ", bookmark_data.owner);
             for (index, bookmark) in bookmark_data.bookmarks.iter().enumerate() {
-                println!("{}. {}\n - {}\n", index + 1, bookmark.title, bookmark.link);
+                println!("{}. {}\n - {}\n", index, bookmark.title, bookmark.link);
             }
         }
         Err(error) => {
             println!("Failed to read bookmark file due to: {}", error);
             return;
         }
     }
-    handle_options_from_user_input();
 }
 
 fn delete_bookmark() {
-    println!("Deleting bookmark now...");
+    view_bookmarks();
+
+    println!("Enter the index of the bookmark you want to delete:");
+    let mut index_input = String::new();
+    io::stdin().read_line(&mut index_input).expect("Failed to read input.");
+    let index_input: usize = match index_input.trim().parse() {
+        Ok(index) => index,
+        Err(error) => {
+            println!("Invalid input. Please enter a valid index due to: {}", error);
+            return;
+        }
+    };
+
+    let mut file = match File::open("assets/lum-marker.json") {
+        Ok(file) => file,
+        Err(error) => {
+            println!("Failed to open bookmark file: {}", error);
+            return;
+        }
+    };
+
+    let mut contents = String::new();
+    if let Err(error) = file.read_to_string(&mut contents) {
+        println!("Failed to read bookmark file: {}", error);
+        return;
+    }
+
+    let mut bookmark_data: BookmarkData = match serde_json::from_str(&contents) {
+        Ok(data) => data,
+        Err(error) => {
+            println!("Failed to parse bookmark data: {}", error);
+            return;
+        }
+    };
+
+    if index_input >= bookmark_data.bookmarks.len() {
+        println!("Index out of bounds. This bookmark probably DO NOT exist.");
+        return;
+    }
+
+    bookmark_data.bookmarks.remove(index_input);
+
+    let new_contents = match serde_json::to_string(&bookmark_data) {
+        Ok(data) => data,
+        Err(error) => {
+            println!("Failed to serialize bookmark data: {}", error);
+            return;
+        }
+    };
+
+    let mut file = match OpenOptions::new().write(true).truncate(true).open("assets/lum-marker.json") {
+        Ok(file) => file,
+        Err(error) => {
+            println!("Failed to open bookmark file for writing: {}", error);
+            return;
+        }
+    };
+
+    if let Err(error) = file.write_all(new_contents.as_bytes()) {
+        println!("Failed to write updated bookmark data to file: {}", error);
+        return;
+    }
+
+    println!("Bookmark deleted successfully.");
 }
 
 fn purge_bookmarks() {