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// Copyright (c) 2022 Teddy Wing
//
// This file is part of Yaqlite.
//
// Yaqlite is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Yaqlite is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Yaqlite. If not, see <https://www.gnu.org/licenses/>.
use yaml_rust::yaml;
use std::borrow::Cow;
/// Wrap `yaml_rust::Yaml`, adding implementations for `rusqlite::ToSql` and
/// `rusqlite::types::FromSql`.
#[derive(Debug)]
pub(crate) struct Yaml<'a>(pub Cow<'a, yaml::Yaml>);
impl<'a> Yaml<'a> {
/// Extracts the wrapped `yaml_rust::Yaml`.
pub fn into_inner(self) -> yaml::Yaml {
self.0.into_owned()
}
}
impl<'a> rusqlite::ToSql for Yaml<'a> {
fn to_sql(&self) -> rusqlite::Result<rusqlite::types::ToSqlOutput<'_>> {
use rusqlite::types::ToSqlOutput;
let sql_output = match *self.0 {
yaml::Yaml::Real(_) => match self.0.as_f64() {
Some(v) => ToSqlOutput::from(v),
None => ToSqlOutput::from(rusqlite::types::Null),
},
yaml::Yaml::Integer(_) => match self.0.as_i64() {
Some(v) => ToSqlOutput::from(v),
None => ToSqlOutput::from(rusqlite::types::Null),
},
yaml::Yaml::String(_) => match self.0.as_str() {
Some(v) => ToSqlOutput::from(v),
None => ToSqlOutput::from(rusqlite::types::Null),
},
yaml::Yaml::Boolean(_) => match self.0.as_bool() {
Some(v) => ToSqlOutput::from(v),
None => ToSqlOutput::from(rusqlite::types::Null),
},
yaml::Yaml::Array(_) => ToSqlOutput::from(rusqlite::types::Null),
yaml::Yaml::Hash(_) => ToSqlOutput::from(rusqlite::types::Null),
yaml::Yaml::Alias(_) => ToSqlOutput::from(rusqlite::types::Null),
yaml::Yaml::Null => ToSqlOutput::from(rusqlite::types::Null),
yaml::Yaml::BadValue => ToSqlOutput::from(rusqlite::types::Null),
};
Ok(sql_output)
}
}
impl<'a> rusqlite::types::FromSql for Yaml<'a> {
fn column_result(
value: rusqlite::types::ValueRef<'_>,
) -> rusqlite::types::FromSqlResult<Self> {
use rusqlite::types::ValueRef;
match value {
ValueRef::Integer(i) => Ok(
Yaml(Cow::Owned(yaml_rust::Yaml::Integer(i))),
),
ValueRef::Real(f) =>
Ok(Yaml(Cow::Owned(yaml_rust::Yaml::Real(f.to_string())))),
ValueRef::Text(_) => {
let s = value.as_str()?;
Ok(Yaml(Cow::Owned(yaml_rust::Yaml::String(s.to_owned()))))
}
ValueRef::Blob(_) => {
// TODO: How should we handle blobs? Parsing as string might not
// make the most sense.
let b = value.as_str()?;
Ok(Yaml(Cow::Owned(yaml_rust::Yaml::String(b.to_owned()))))
}
ValueRef::Null => Ok(Yaml(Cow::Owned(yaml_rust::Yaml::Null))),
}
}
}
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