1 files changed, 122 insertions, 0 deletions

diff --git a/src/commands/web.rs b/src/commands/web.rs
new file mode 100644
index 0000000..d68f663
--- /dev/null
+++ b/src/commands/web.rs
@@ -0,0 +1,122 @@
+use poise::serenity_prelude as serenity;
+use scraper::{Html, Selector};
+
+use crate::Data;
+use crate::error::{Error, Result};
+use crate::lang;
+
+type Context<'a> = poise::Context<'a, Data, Error>;
+
+/// Search the web via DuckDuckGo
+#[poise::command(slash_command)]
+pub async fn web(ctx: Context<'_>, #[description = "Search query"] query: String) -> Result<()> {
+    ctx.defer().await?;
+
+    let url = format!(
+        "https://html.duckduckgo.com/html/?q={}",
+        urlencoding(&query)
+    );
+    let html = ctx
+        .data()
+        .http_client
+        .get(&url)
+        .send()
+        .await?
+        .text()
+        .await?;
+
+    let results = {
+        let document = Html::parse_document(&html);
+
+        let result_selector = Selector::parse(".result").unwrap();
+        let title_selector = Selector::parse(".result__title a").unwrap();
+        let snippet_selector = Selector::parse(".result__snippet").unwrap();
+
+        let mut results = Vec::new();
+        for result in document.select(&result_selector).take(5) {
+            let title = result
+                .select(&title_selector)
+                .next()
+                .map(|a| a.text().collect::<String>())
+                .unwrap_or_default();
+
+            let url = result
+                .select(&title_selector)
+                .next()
+                .and_then(|a| a.attr("href"))
+                .unwrap_or("")
+                .to_string();
+
+            let snippet = result
+                .select(&snippet_selector)
+                .next()
+                .map(|s| s.text().collect::<String>())
+                .unwrap_or_default();
+
+            let clean_url = if let Some(encoded) = url.split("uddg=").nth(1) {
+                let encoded = encoded.split('&').next().unwrap_or(encoded);
+                url_decode(encoded)
+            } else {
+                url.to_string()
+            };
+
+            results.push((title, clean_url, snippet));
+        }
+        results
+    };
+
+    if results.is_empty() {
+        ctx.say(lang::L_WEB_NO_RESULTS).await?;
+        return Ok(());
+    }
+
+    let mut embed = serenity::CreateEmbed::default()
+        .title(lang::fmt_web_title(&query))
+        .color(0x00aaff);
+
+    for (i, (title, url, snippet)) in results.iter().enumerate() {
+        embed = embed.field(
+            format!("{}. {title}", i + 1),
+            format!("{url}\n{snippet}"),
+            false,
+        );
+    }
+
+    ctx.send(poise::CreateReply::default().embed(embed)).await?;
+    Ok(())
+}
+
+fn url_decode(s: &str) -> String {
+    let mut result = String::new();
+    let mut chars = s.chars();
+    while let Some(c) = chars.next() {
+        match c {
+            '+' => result.push(' '),
+            '%' => {
+                let hi = chars.next().and_then(|c| c.to_digit(16));
+                let lo = chars.next().and_then(|c| c.to_digit(16));
+                if let (Some(hi), Some(lo)) = (hi, lo) {
+                    result.push(char::from_u32((hi << 4) | lo).unwrap_or('�'));
+                } else {
+                    result.push('%');
+                }
+            }
+            _ => result.push(c),
+        }
+    }
+    result
+}
+
+fn urlencoding(s: &str) -> String {
+    s.chars()
+        .map(|c| match c {
+            'A'..='Z' | 'a'..='z' | '0'..='9' | '_' | '-' | '.' | '~' => c.to_string(),
+            ' ' => "+".to_string(),
+            _ => format!("%{:02X}", c as u8),
+        })
+        .collect()
+}
+
+pub fn commands() -> Vec<poise::Command<Data, Error>> {
+    vec![web()]
+}