MeiliSearch/meilisearch-core/src/settings.rs
2020-12-15 12:04:51 +01:00

184 lines
6.4 KiB
Rust

use std::collections::{BTreeMap, BTreeSet};
use std::str::FromStr;
use std::iter::IntoIterator;
use serde::{Deserialize, Deserializer, Serialize};
use once_cell::sync::Lazy;
use self::RankingRule::*;
pub const DEFAULT_RANKING_RULES: [RankingRule; 6] = [Typo, Words, Proximity, Attribute, WordsPosition, Exactness];
static RANKING_RULE_REGEX: Lazy<regex::Regex> = Lazy::new(|| {
regex::Regex::new(r"(asc|desc)\(([a-zA-Z0-9-_]*)\)").unwrap()
});
#[derive(Default, Clone, Serialize, Deserialize, Debug)]
#[serde(rename_all = "camelCase", deny_unknown_fields)]
pub struct Settings {
#[serde(default, deserialize_with = "deserialize_some")]
pub ranking_rules: Option<Option<Vec<String>>>,
#[serde(default, deserialize_with = "deserialize_some")]
pub distinct_attribute: Option<Option<String>>,
#[serde(default, deserialize_with = "deserialize_some")]
pub searchable_attributes: Option<Option<Vec<String>>>,
#[serde(default, deserialize_with = "deserialize_some")]
pub displayed_attributes: Option<Option<BTreeSet<String>>>,
#[serde(default, deserialize_with = "deserialize_some")]
pub stop_words: Option<Option<BTreeSet<String>>>,
#[serde(default, deserialize_with = "deserialize_some")]
pub synonyms: Option<Option<BTreeMap<String, Vec<String>>>>,
#[serde(default, deserialize_with = "deserialize_some")]
pub attributes_for_faceting: Option<Option<Vec<String>>>,
}
// Any value that is present is considered Some value, including null.
fn deserialize_some<'de, T, D>(deserializer: D) -> Result<Option<T>, D::Error>
where T: Deserialize<'de>,
D: Deserializer<'de>
{
Deserialize::deserialize(deserializer).map(Some)
}
impl Settings {
pub fn to_update(&self) -> Result<SettingsUpdate, RankingRuleConversionError> {
let settings = self.clone();
let ranking_rules = match settings.ranking_rules {
Some(Some(rules)) => UpdateState::Update(RankingRule::try_from_iter(rules.iter())?),
Some(None) => UpdateState::Clear,
None => UpdateState::Nothing,
};
Ok(SettingsUpdate {
ranking_rules,
distinct_attribute: settings.distinct_attribute.into(),
primary_key: UpdateState::Nothing,
searchable_attributes: settings.searchable_attributes.into(),
displayed_attributes: settings.displayed_attributes.into(),
stop_words: settings.stop_words.into(),
synonyms: settings.synonyms.into(),
attributes_for_faceting: settings.attributes_for_faceting.into(),
})
}
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum UpdateState<T> {
Update(T),
Clear,
Nothing,
}
impl <T> From<Option<Option<T>>> for UpdateState<T> {
fn from(opt: Option<Option<T>>) -> UpdateState<T> {
match opt {
Some(Some(t)) => UpdateState::Update(t),
Some(None) => UpdateState::Clear,
None => UpdateState::Nothing,
}
}
}
#[derive(Debug, Clone)]
pub struct RankingRuleConversionError;
impl std::fmt::Display for RankingRuleConversionError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(f, "impossible to convert into RankingRule")
}
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum RankingRule {
Typo,
Words,
Proximity,
Attribute,
WordsPosition,
Exactness,
Asc(String),
Desc(String),
}
impl std::fmt::Display for RankingRule {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
RankingRule::Typo => f.write_str("typo"),
RankingRule::Words => f.write_str("words"),
RankingRule::Proximity => f.write_str("proximity"),
RankingRule::Attribute => f.write_str("attribute"),
RankingRule::WordsPosition => f.write_str("wordsPosition"),
RankingRule::Exactness => f.write_str("exactness"),
RankingRule::Asc(field) => write!(f, "asc({})", field),
RankingRule::Desc(field) => write!(f, "desc({})", field),
}
}
}
impl FromStr for RankingRule {
type Err = RankingRuleConversionError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let rule = match s {
"typo" => RankingRule::Typo,
"words" => RankingRule::Words,
"proximity" => RankingRule::Proximity,
"attribute" => RankingRule::Attribute,
"wordsPosition" => RankingRule::WordsPosition,
"exactness" => RankingRule::Exactness,
_ => {
let captures = RANKING_RULE_REGEX.captures(s).ok_or(RankingRuleConversionError)?;
match (captures.get(1).map(|m| m.as_str()), captures.get(2)) {
(Some("asc"), Some(field)) => RankingRule::Asc(field.as_str().to_string()),
(Some("desc"), Some(field)) => RankingRule::Desc(field.as_str().to_string()),
_ => return Err(RankingRuleConversionError)
}
}
};
Ok(rule)
}
}
impl RankingRule {
pub fn field(&self) -> Option<&str> {
match self {
RankingRule::Asc(field) | RankingRule::Desc(field) => Some(field),
_ => None,
}
}
pub fn try_from_iter(rules: impl IntoIterator<Item = impl AsRef<str>>) -> Result<Vec<RankingRule>, RankingRuleConversionError> {
rules.into_iter()
.map(|s| RankingRule::from_str(s.as_ref()))
.collect()
}
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SettingsUpdate {
pub ranking_rules: UpdateState<Vec<RankingRule>>,
pub distinct_attribute: UpdateState<String>,
pub primary_key: UpdateState<String>,
pub searchable_attributes: UpdateState<Vec<String>>,
pub displayed_attributes: UpdateState<BTreeSet<String>>,
pub stop_words: UpdateState<BTreeSet<String>>,
pub synonyms: UpdateState<BTreeMap<String, Vec<String>>>,
pub attributes_for_faceting: UpdateState<Vec<String>>,
}
impl Default for SettingsUpdate {
fn default() -> Self {
Self {
ranking_rules: UpdateState::Nothing,
distinct_attribute: UpdateState::Nothing,
primary_key: UpdateState::Nothing,
searchable_attributes: UpdateState::Nothing,
displayed_attributes: UpdateState::Nothing,
stop_words: UpdateState::Nothing,
synonyms: UpdateState::Nothing,
attributes_for_faceting: UpdateState::Nothing,
}
}
}