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use ilc_base::{self, Context, Decode, Event};
use ilc_base::event::Type;
use std::collections::HashMap;
use std::io::{BufRead, Write};
struct Person {
lines: u32,
alpha_lines: u32,
words: u32,
}
fn words_alpha(s: &str) -> (u32, bool) {
let mut alpha = false;
let mut words = 0;
for w in s.split_whitespace() {
if !w.is_empty() {
words += 1;
if w.chars().any(char::is_alphabetic) {
alpha = true
}
}
}
(words, alpha)
}
fn strip_nick_prefix(s: &str) -> &str {
if s.is_empty() {
return s;
}
match s.as_bytes()[0] {
b'~' | b'&' | b'@' | b'%' | b'+' => &s[1..],
_ => s,
}
}
// TODO: Don't print results, return Stats struct
pub fn freq(count: usize,
ctx: &Context,
input: &mut BufRead,
decoder: &mut Decode,
output: &mut Write)
-> ilc_base::Result<()> {
let mut stats: HashMap<String, Person> = HashMap::new();
for e in decoder.decode(&ctx, input) {
let m = try!(e);
match m {
Event { ty: Type::Msg { ref from, ref content, .. }, .. } => {
let nick = strip_nick_prefix(from);
if stats.contains_key(nick) {
let p: &mut Person = stats.get_mut(nick).unwrap();
let (words, alpha) = words_alpha(content);
p.lines += 1;
if alpha {
p.alpha_lines += 1
}
p.words += words;
} else {
let (words, alpha) = words_alpha(content);
stats.insert(nick.to_owned(),
Person {
lines: 1,
alpha_lines: if alpha { 1 } else { 0 },
words: words,
});
}
}
_ => (),
}
}
let mut stats: Vec<(String, Person)> = stats.into_iter().collect();
stats.sort_by(|&(_, ref a), &(_, ref b)| b.words.cmp(&a.words));
for &(ref name, ref stat) in stats.iter().take(count) {
try!(write!(output,
"{}:\n\tTotal lines: {}\n\tLines without alphabetic characters: {}\n\tTotal \
words: {}\n\tWords per line: {}\n",
name,
stat.lines,
stat.lines - stat.alpha_lines,
stat.words,
stat.words as f32 / stat.lines as f32));
}
Ok(())
}
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