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Use starts_with for forbidden unicode (Fix #3888) (#4079)

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* Use starts_with for forbidden unicode (Fix #3888)

* Require 3 visible chars in display name

* Run cargo fmt and scripts/lint

* Undo invisibly_starts_with_at

* Remove 3 min chars.count() check for display name
This commit is contained in:
HackerNCoder 2023-10-24 14:57:40 +00:00 committed by GitHub
parent 09a67472e7
commit 722d9efc13
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1 changed files with 27 additions and 4 deletions
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31
crates/utils/src/utils/validation.rs
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@ -99,13 +99,29 @@ pub fn is_valid_actor_name(name: &str, actor_name_max_length: usize) -> LemmyRes
}
}
fn has_3_permitted_display_chars(name: &str) -> bool {
let mut num_non_fdc: i8 = 0;
for c in name.chars() {
if !FORBIDDEN_DISPLAY_CHARS.contains(&c) {
num_non_fdc += 1;
if num_non_fdc >= 3 {
break;
}
}
}
if num_non_fdc >= 3 {
return true;
}
false
}
// Can't do a regex here, reverse lookarounds not supported
pub fn is_valid_display_name(name: &str, actor_name_max_length: usize) -> LemmyResult<()> {
let check = !name.contains(FORBIDDEN_DISPLAY_CHARS)
&& !name.starts_with('@')
&& name.chars().count() >= 3
let check = !name.starts_with('@')
&& !name.starts_with(FORBIDDEN_DISPLAY_CHARS)
&& name.chars().count() <= actor_name_max_length
&& !has_newline(name);
&& !has_newline(name)
&& has_3_permitted_display_chars(name);
if !check {
Err(LemmyErrorType::InvalidDisplayName.into())
} else {
@ -323,6 +339,13 @@ mod tests {
let actor_name_max_length = 20;
assert!(is_valid_display_name("hello @there", actor_name_max_length).is_ok());
assert!(is_valid_display_name("@hello there", actor_name_max_length).is_err());
assert!(is_valid_display_name("\u{200d}hello", actor_name_max_length).is_err());
assert!(is_valid_display_name(
"\u{1f3f3}\u{fe0f}\u{200d}\u{26a7}\u{fe0f}Name",
actor_name_max_length
)
.is_ok());
assert!(is_valid_display_name("\u{2003}1\u{ffa0}2\u{200d}", actor_name_max_length).is_err());
// Make sure zero-space with an @ doesn't work
assert!(