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use toml;
#[macro_use] extern crate serde_derive;
#[macro_use] extern crate lazy_static;
#[macro_use] extern crate quick_error;
use std::borrow::Cow;
use std::collections::BTreeMap;
use toml::value::{Table, Value};
mod tuning;
pub use crate::tuning::*;
const CATEGORIES_TOML: &[u8] = include_bytes!("categories.toml");
#[derive(Debug, Clone)]
pub struct Categories {
pub root: CategoryMap,
}
#[derive(Debug, Clone, Deserialize)]
#[serde(rename_all = "kebab-case")]
pub struct Category {
pub name: String,
pub description: String,
pub short_description: String,
pub standalone_name: Option<String>,
pub title: String,
pub slug: String,
// fudge factor for selecting primary category (how useful and specific it is)
pub preference: f32,
pub sub: CategoryMap,
pub siblings: Vec<String>,
pub obvious_keywords: Vec<String>,
}
pub type CategoryMap = BTreeMap<String, Category>;
pub type CResult<T> = Result<T, CatError>;
quick_error! {
#[derive(Debug, Clone)]
pub enum CatError {
MissingField {}
Parse(err: toml::de::Error) {
display("Categories parse error: {}", err)
from()
cause(err)
}
}
}
lazy_static! {
pub static ref CATEGORIES: Categories = Categories::new().expect("built-in categories");
}
impl Categories {
fn new() -> CResult<Self> {
Ok(Self {
root: Self::categories_from_table("", toml::from_slice(CATEGORIES_TOML)?)?
})
}
/// true if full match
pub fn from_slug<S: AsRef<str>>(&self, slug: S) -> (Vec<&Category>, bool) {
let mut out = Vec::new();
let mut cats = &self.root;
for name in slug.as_ref().split("::") {
match cats.get(name) {
Some(cat) => {
cats = &cat.sub;
out.push(cat);
},
None => return (out, false),
}
}
(out, true)
}
fn categories_from_table(full_slug_start: &str, toml: Table) -> CResult<CategoryMap> {
toml.into_iter().map(|(slug, details)| {
let mut details: Table = details.try_into()?;
let name = details.remove("name").ok_or(CatError::MissingField)?.try_into()?;
let description = details.remove("description").ok_or(CatError::MissingField)?.try_into()?;
let short_description = details.remove("short-description").ok_or(CatError::MissingField)?.try_into()?;
let title = details.remove("title").ok_or(CatError::MissingField)?.try_into()?;
let standalone_name = details.remove("standalone-name").and_then(|v| v.try_into().ok());
let obvious_keywords = details.remove("obvious-keywords").and_then(|v| v.try_into().ok()).unwrap_or_default();
let preference = details.remove("preference").ok_or(CatError::MissingField)?.try_into()?;
let siblings = details.remove("siblings").and_then(|v| v.try_into().ok()).unwrap_or_default();
let mut full_slug = String::with_capacity(full_slug_start.len() + 2 + slug.len());
if full_slug_start != "" {
full_slug.push_str(full_slug_start);
full_slug.push_str("::");
}
full_slug.push_str(&slug);
let sub = if let Some(Value::Table(table)) = details.remove("categories") {
Self::categories_from_table(&full_slug, table)?
} else {
CategoryMap::new()
};
Ok((slug, Category {
name,
title,
short_description,
standalone_name,
description,
preference,
slug: full_slug,
sub,
siblings,
obvious_keywords,
}))
}).collect()
}
pub fn filtered_category_slugs(cats: &[String]) -> impl Iterator<Item = &str> {
cats.iter().filter_map(|s| {
if s.len() < 2 {
return None;
}
if s == "external-ffi-bindings" { // We pretend it doesn't exist
return None;
}
if s == "api-bindings" { // We pretend it doesn't exist
return None;
}
Some(s.as_str())
})
}
pub fn fixed_category_slugs(cats: &[String]) -> Vec<Cow<'_, str>> {
let mut cats = Self::filtered_category_slugs(cats).enumerate()
.filter_map(|(idx, s)| {
let s = s.trim_matches(':');
let mut chars = s.chars().peekable();
while let Some(cur) = chars.next() {
// look for a:b instead of a::b
if cur == ':' && chars.peek().map_or(false, |&c| c == ':') {
chars.next(); // OK, skip second ':'
continue;
}
if cur == '-' || cur.is_ascii_lowercase() || cur.is_ascii_digit() {
continue;
}
// bad syntax! Fix!
let slug = s.to_ascii_lowercase().split(':').filter(|s| !s.is_empty()).collect::<Vec<_>>().join("::");
if s.is_empty() {
return None;
}
let depth = slug.split("::").count();
return Some((depth, idx, slug.into()));
}
let depth = s.split("::").count();
Some((depth, idx, Cow::Borrowed(s)))
})
.filter(|(_, _, s)| {
if !CATEGORIES.from_slug(s).1 {
println!("invalid cat name {}", s);
return false;
}
true
})
.collect::<Vec<_>>();
// depth, then original order
cats.sort_by(|a, b| b.0.cmp(&a.0).then(a.1.cmp(&b.1)));
cats.into_iter().map(|(_, _, c)| c).collect()
}
}
impl Category {
pub fn standalone_name(&self) -> &str {
self.standalone_name.as_ref().unwrap_or(&self.name).as_str()
}
}
#[test]
fn cat() {
Categories::new().expect("categories").root.get("parsing").expect("parsing");
CATEGORIES.root.get("development-tools").expect("development-tools").sub.get("build-utils").expect("build-utils");
}
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