functionality add new bookmark

assets/lum-marker.json

@@ -1,26 +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"
-	}
-    ]
-}
+{"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

@@ -1,7 +1,7 @@
 use serde::{Serialize, Deserialize};
 use std::io;
 use std::io::prelude::*;
-use std::fs::File;
+use std::fs::{File, OpenOptions};
 use std::num::ParseIntError;
 use std::time::{SystemTime, UNIX_EPOCH};
 use std::env;
@@ -80,7 +80,7 @@ fn handle_options_from_user_input() {
 
 /*
  * @TODO: The whole "input" logic will soon be moved to a specific directory/file so I can have a better
- * controll on this section -> src/
+ * controll on this section
  */
 fn print_options() {
     println!("What is the operation?");
@@ -93,7 +93,64 @@ fn print_options() {
 }
 
 fn add_new_bookmark() {
-    println!("Adding a new bookmark now...");
+    let mut file = match File::open("assets/lum-marker.json") {
+	Ok(file) => file,
+	Err(error) => {
+	    println!("Error due to: {}", error);
+		return;
+	}
+    };
+
+    let mut contents = String::new();
+    if let Err(error) = file.read_to_string(&mut contents) {
+	println!("Failed due to: {}", error);
+	return;
+    };
+
+    let mut bookmark_data: BookmarkData = match serde_json::from_str(&contents) {
+        Ok(data) => data,
+        Err(error) => {
+            println!("Failed to parse bookmark data due to: {}", error);
+            return;
+        }
+    };
+
+    println!("Enter the title for the new bookmark:");
+    let mut title = String::new();
+    io::stdin().read_line(&mut title).expect("Failed to read input.");
+    let title = title.trim().to_string();
+
+    println!("Enter the link for the new bookmark:");
+    let mut link = String::new();
+    io::stdin().read_line(&mut link).expect("Failed to read input.");
+    let link = link.trim().to_string();
+
+    let new_bookmark = Bookmark { title, link };
+
+    bookmark_data.bookmarks.push(new_bookmark);
+
+    let new_contents = match serde_json::to_string(&bookmark_data) {
+        Ok(data) => data,
+        Err(error) => {
+            println!("Failed to serialize bookmark data due to: {}", 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 due to: {}", error);
+            return;
+        }
+    };
+
+    if let Err(error) = file.write_all(new_contents.as_bytes()) {
+        println!("Failed to write updated bookmark data to file due to: {}", error);
+        return;
+    }
+
+    println!("New bookmark added successfully.");
 }
 
 fn view_bookmarks() {
@@ -126,6 +183,7 @@ fn view_bookmarks() {
             return;
         }
     }
+    handle_options_from_user_input();
 }
 
 fn delete_bookmark() {