zhenyi
65 lines
1.7 KiB
Rust
65 lines
1.7 KiB
Rust
pub use crate::service::util::{
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clamp_limit_offset, ensure_affected, merge_optional_text, parse_enum, required_text, role_level,
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};
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/// Maximum length for a channel name.
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pub const MAX_CHANNEL_NAME: usize = 100;
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/// Maximum length for a channel topic.
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pub const MAX_CHANNEL_TOPIC: usize = 1024;
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/// Maximum length for a message body.
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pub const MAX_MESSAGE_BODY: usize = 4096;
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/// Maximum length for an article title.
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pub const MAX_ARTICLE_TITLE: usize = 256;
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/// Maximum number of poll options.
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pub const MAX_POLL_OPTIONS: usize = 10;
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/// Maximum length for a poll option text.
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pub const MAX_POLL_OPTION_TEXT: usize = 100;
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/// Redis key prefix for typing indicators.
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pub const TYPING_PREFIX: &str = "im:typing:";
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/// Redis key prefix for user presence.
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pub const PRESENCE_PREFIX: &str = "im:presence:";
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/// Redis TTL for typing indicators (seconds).
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pub const TYPING_TTL_SECS: usize = 8;
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/// Redis TTL for presence heartbeats (seconds).
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pub const PRESENCE_TTL_SECS: usize = 120;
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/// Maximum length for generated slugs.
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pub const MAX_SLUG_LEN: usize = 128;
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/// Generate a slug from a title string.
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pub fn slugify(title: &str) -> String {
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let slug: String = title
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.to_lowercase()
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.chars()
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.filter_map(|c| {
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if c.is_ascii_alphanumeric() {
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Some(c)
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} else if c.is_whitespace() || !c.is_ascii() {
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Some('-')
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} else {
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None
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}
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})
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.collect::<String>()
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.split('-')
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.filter(|s| !s.is_empty())
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.collect::<Vec<_>>()
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.join("-");
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let mut result = slug;
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result.truncate(MAX_SLUG_LEN);
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if result.ends_with('-') {
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result.pop();
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}
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result
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}
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