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use crate::{DatabaseError, DatabaseResult, Ent, Id, WeakDatabaseRc};
use derive_more::{Constructor, IntoIterator};
use std::{fmt::Debug, iter::Extend};
mod filter;
pub use filter::*;
mod predicate;
pub use predicate::*;
pub trait EntQuery: Sized {
type Output;
fn execute_with_db(self, db: WeakDatabaseRc) -> DatabaseResult<Self::Output>;
fn execute(self) -> DatabaseResult<Self::Output> {
Self::execute_with_db(self, crate::global::db())
}
}
#[derive(Constructor, IntoIterator, Clone, Debug, Default)]
pub struct Query(Vec<Filter>);
impl EntQuery for Query {
type Output = Vec<Box<dyn Ent>>;
#[inline]
fn execute_with_db(self, db: WeakDatabaseRc) -> DatabaseResult<Self::Output> {
let database = WeakDatabaseRc::upgrade(&db).ok_or(DatabaseError::Disconnected)?;
database.find_all(self)
}
}
impl Extend<Filter> for Query {
fn extend<T: IntoIterator<Item = Filter>>(&mut self, iter: T) {
self.0.extend(iter)
}
}
impl Query {
pub fn chain(self, filter: Filter) -> Self {
let mut filters = self.0;
filters.push(filter);
Query::new(filters)
}
pub fn add_filter(&mut self, filter: Filter) -> &mut Self {
self.0.push(filter);
self
}
pub fn where_id<P: Into<TypedPredicate<Id>>>(self, p: P) -> Self {
self.chain(Filter::where_id(p))
}
pub fn where_type<P: Into<TypedPredicate<String>>>(self, p: P) -> Self {
self.chain(Filter::where_type(p))
}
pub fn where_created<P: Into<TypedPredicate<u64>>>(self, p: P) -> Self {
self.chain(Filter::where_created(p))
}
pub fn where_last_updated<P: Into<TypedPredicate<u64>>>(self, p: P) -> Self {
self.chain(Filter::where_last_updated(p))
}
pub fn where_field<S: Into<String>, P: Into<Predicate>>(self, name: S, p: P) -> Self {
self.chain(Filter::where_field(name, p))
}
pub fn where_edge<S: Into<String>, F: Into<Filter>>(self, name: S, filter: F) -> Self {
self.chain(Filter::where_edge(name, filter))
}
pub fn where_into_edge<S: Into<String>>(self, name: S) -> Self {
self.chain(Filter::where_into_edge(name))
}
}