use chrono::{DateTime, Local};
use ratatui::style::{Color, Modifier, Style};
use unicode_width::UnicodeWidthStr;
use crate::{
discord::EmbedInfo,
tui::format::{RenderedText, replace_custom_emoji_markup_in_rendered_with_images},
};
use super::{
DIM, MessageContentLine, prefix_message_content_line_with_style,
wrap_rendered_text_lines_with_loaded_custom_emoji_urls,
};
pub(super) fn format_embed_lines(
embeds: &[EmbedInfo],
message_content: Option<&str>,
show_custom_emoji: bool,
width: usize,
loaded_custom_emoji_urls: &[String],
) -> Vec<MessageContentLine> {
embeds
.iter()
.flat_map(|embed| {
format_embed(
embed,
message_content,
show_custom_emoji,
width,
loaded_custom_emoji_urls,
)
})
.collect()
}
fn format_embed(
embed: &EmbedInfo,
message_content: Option<&str>,
show_custom_emoji: bool,
width: usize,
loaded_custom_emoji_urls: &[String],
) -> Vec<MessageContentLine> {
const PREFIX: &str = " ▎ ";
let inner_width = width.saturating_sub(PREFIX.width()).max(1);
let mut lines = Vec::new();
push_embed_text(
&mut lines,
embed.provider_name.as_deref(),
show_custom_emoji,
inner_width,
embed_provider_style(),
loaded_custom_emoji_urls,
);
push_embed_text(
&mut lines,
embed.author_name.as_deref(),
show_custom_emoji,
inner_width,
embed_author_style(),
loaded_custom_emoji_urls,
);
push_embed_text(
&mut lines,
embed.title.as_deref(),
show_custom_emoji,
inner_width,
embed_title_style(),
loaded_custom_emoji_urls,
);
let description = embed.description.as_deref().map(plain_embed_text);
push_embed_text(
&mut lines,
description.as_deref(),
show_custom_emoji,
inner_width,
Style::default(),
loaded_custom_emoji_urls,
);
for field in &embed.fields {
push_embed_text(
&mut lines,
Some(field.name.as_str()),
show_custom_emoji,
inner_width,
embed_field_name_style(),
loaded_custom_emoji_urls,
);
push_embed_text(
&mut lines,
Some(field.value.as_str()),
show_custom_emoji,
inner_width,
Style::default(),
loaded_custom_emoji_urls,
);
}
let footer = format_embed_footer(embed);
push_embed_text(
&mut lines,
footer.as_deref(),
show_custom_emoji,
inner_width,
embed_footer_style(),
loaded_custom_emoji_urls,
);
for url in [&embed.url]
.into_iter()
.filter_map(|url| url.as_deref())
.filter(|url| !message_content.is_some_and(|content| content.contains(url)))
{
push_embed_text(
&mut lines,
Some(url),
show_custom_emoji,
inner_width,
embed_url_style(),
loaded_custom_emoji_urls,
);
}
lines
.into_iter()
.map(|line| prefix_message_content_line_with_style(PREFIX, embed_line_style(embed), line))
.collect()
}
fn plain_embed_text(value: &str) -> String {
let value = value.replace('\u{fe00}', "");
let mut output = String::with_capacity(value.len());
let mut cursor = 0usize;
while let Some(relative_start) = value[cursor..].find('[') {
let start = cursor.saturating_add(relative_start);
output.push_str(&plain_embed_fragment(&value[cursor..start]));
let Some(label_end) = value[start + 1..].find(']').map(|end| start + 1 + end) else {
output.push_str(&plain_embed_fragment(&value[start..]));
return output;
};
let url_start = label_end.saturating_add(1);
if !value[url_start..].starts_with('(') {
output.push('[');
cursor = start.saturating_add(1);
continue;
}
let Some(url_end) = value[url_start + 1..]
.find(')')
.map(|end| url_start + 1 + end)
else {
output.push_str(&plain_embed_fragment(&value[start..]));
return output;
};
let label = plain_embed_fragment(&value[start + 1..label_end]);
let url = unescape_embed_markdown(&value[url_start + 1..url_end]);
push_plain_embed_link(&mut output, &label, &url);
cursor = url_end.saturating_add(1);
}
output.push_str(&plain_embed_fragment(&value[cursor..]));
output
}
fn plain_embed_fragment(value: &str) -> String {
unescape_embed_markdown(&strip_embed_markdown_emphasis(value))
}
fn push_plain_embed_link(output: &mut String, label: &str, url: &str) {
if is_low_value_embed_link_url(url) {
output.push_str(label);
return;
}
if label.is_empty() {
output.push_str(url);
} else if label == url || url.is_empty() {
output.push_str(label);
} else {
output.push_str(label);
output.push_str(" (");
output.push_str(url);
output.push(')');
}
}
fn is_low_value_embed_link_url(url: &str) -> bool {
let url = url.to_ascii_lowercase();
url.starts_with("https://x.com/intent/") || url.starts_with("https://twitter.com/intent/")
}
fn unescape_embed_markdown(value: &str) -> String {
let mut output = String::with_capacity(value.len());
let mut chars = value.chars().peekable();
while let Some(ch) = chars.next() {
if ch == '\\'
&& chars.peek().is_some_and(|next| {
matches!(
next,
'\\' | '*' | '_' | '`' | '~' | '|' | '[' | ']' | '(' | ')' | '.' | '!' | '#'
)
})
{
if let Some(next) = chars.next() {
output.push(next);
}
} else {
output.push(ch);
}
}
output
}
fn strip_embed_markdown_emphasis(value: &str) -> String {
value.replace("**", "")
}
fn format_embed_footer(embed: &EmbedInfo) -> Option<String> {
match (
embed.footer_text.as_deref(),
embed.timestamp.as_deref().and_then(format_embed_timestamp),
) {
(Some(text), Some(timestamp)) => Some(format!("{text} · {timestamp}")),
(Some(text), None) => Some(text.to_owned()),
(None, Some(timestamp)) => Some(timestamp),
(None, None) => None,
}
}
fn format_embed_timestamp(timestamp: &str) -> Option<String> {
DateTime::parse_from_rfc3339(timestamp)
.ok()
.map(|datetime| datetime.with_timezone(&Local).format("%H:%M").to_string())
}
fn push_embed_text(
lines: &mut Vec<MessageContentLine>,
value: Option<&str>,
show_custom_emoji: bool,
width: usize,
style: Style,
loaded_custom_emoji_urls: &[String],
) {
let Some(value) = value.filter(|value| !value.is_empty()) else {
return;
};
let rendered = replace_custom_emoji_markup_in_rendered_with_images(
RenderedText {
text: value.to_owned(),
highlights: Vec::new(),
emoji_slots: Vec::new(),
},
show_custom_emoji,
);
lines.extend(wrap_rendered_text_lines_with_loaded_custom_emoji_urls(
rendered,
width,
style,
loaded_custom_emoji_urls,
));
}
fn embed_provider_style() -> Style {
Style::default().fg(DIM).add_modifier(Modifier::ITALIC)
}
fn embed_author_style() -> Style {
Style::default().add_modifier(Modifier::ITALIC)
}
fn embed_title_style() -> Style {
Style::default()
.fg(Color::Blue)
.add_modifier(Modifier::BOLD)
}
fn embed_field_name_style() -> Style {
Style::default()
.add_modifier(Modifier::BOLD)
.add_modifier(Modifier::UNDERLINED)
}
fn embed_footer_style() -> Style {
Style::default().fg(DIM).add_modifier(Modifier::ITALIC)
}
fn embed_url_style() -> Style {
Style::default()
.fg(Color::Blue)
.add_modifier(Modifier::UNDERLINED)
}
fn embed_line_style(embed: &EmbedInfo) -> Style {
Style::default().fg(embed_line_color(embed))
}
fn embed_line_color(embed: &EmbedInfo) -> Color {
embed.color.map(embed_color).unwrap_or(Color::Red)
}
pub(in crate::tui) fn embed_color(color: u32) -> Color {
Color::Rgb(
((color >> 16) & 0xff) as u8,
((color >> 8) & 0xff) as u8,
(color & 0xff) as u8,
)
}