85 lines
1.7 KiB
Rust
85 lines
1.7 KiB
Rust
use crate::sql::comment::{mightbespace, shouldbespace};
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use crate::sql::error::IResult;
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use crate::sql::ident::{ident, Ident};
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use crate::sql::scoring::{scoring, Scoring};
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use nom::branch::alt;
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use nom::bytes::complete::{tag, tag_no_case};
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use nom::combinator::map;
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use serde::{Deserialize, Serialize};
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use std::fmt;
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#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize, Hash)]
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pub enum Index {
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/// (Basic) non unique
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Idx,
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/// Unique index
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Uniq,
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/// Index with Full-Text search capabilities
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Search {
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az: Ident,
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hl: bool,
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sc: Scoring,
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},
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}
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impl Default for Index {
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fn default() -> Self {
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Self::Idx
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}
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}
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impl fmt::Display for Index {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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match self {
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Self::Idx => Ok(()),
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Self::Uniq => f.write_str("UNIQUE"),
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Self::Search {
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az,
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hl,
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sc,
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} => {
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write!(f, "SEARCH {} {}", az, sc)?;
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if *hl {
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f.write_str(" HIGHLIGHTS")?
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}
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Ok(())
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}
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}
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}
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}
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pub fn index(i: &str) -> IResult<&str, Index> {
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alt((unique, search, non_unique))(i)
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}
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pub fn non_unique(i: &str) -> IResult<&str, Index> {
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let (i, _) = tag("")(i)?;
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Ok((i, Index::Idx))
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}
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pub fn unique(i: &str) -> IResult<&str, Index> {
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let (i, _) = tag_no_case("UNIQUE")(i)?;
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Ok((i, Index::Uniq))
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}
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pub fn highlights(i: &str) -> IResult<&str, bool> {
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let (i, _) = mightbespace(i)?;
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alt((map(tag("HIGHLIGHTS"), |_| true), map(tag(""), |_| false)))(i)
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}
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pub fn search(i: &str) -> IResult<&str, Index> {
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let (i, _) = tag_no_case("SEARCH")(i)?;
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let (i, _) = shouldbespace(i)?;
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let (i, az) = ident(i)?;
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let (i, _) = shouldbespace(i)?;
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let (i, sc) = scoring(i)?;
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let (i, hl) = highlights(i)?;
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Ok((
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i,
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Index::Search {
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az,
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sc,
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hl,
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},
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))
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}
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