Check mention and link counts when creating post

CHANGELOG.md

@@ -9,6 +9,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Changed
 
 - Added emoji count check to profile data validator.
+- Check mention and link counts when creating post.
 
 ## [1.20.0] - 2023-03-07
 

src/mastodon_api/statuses/views.rs

@@ -59,6 +59,8 @@ use crate::validators::posts::{
     clean_content,
     ATTACHMENT_LIMIT,
     EMOJI_LIMIT,
+    MENTION_LIMIT,
+    LINK_LIMIT,
 };
 use super::helpers::{
     build_status,
@@ -129,11 +131,17 @@ async fn create_status(
     // Remove duplicate mentions
     mentions.sort();
     mentions.dedup();
+    if mentions.len() > MENTION_LIMIT {
+        return Err(ValidationError("too many mentions").into());
+    };
 
     // Links validation
     if links.len() > 0 && visibility != Visibility::Public {
         return Err(ValidationError("can't add links to non-public posts").into());
     };
+    if links.len() > LINK_LIMIT {
+        return Err(ValidationError("too many links").into());
+    };
 
     // Emoji validation
     let emojis: Vec<_> = emojis.iter().map(|emoji| emoji.id).collect();