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use common::types::PointOffsetType;
use itertools::Itertools;
use super::binary_index::BinaryIndex;
use super::map_index::MapIndex;
use crate::data_types::facets::{FacetHit, FacetValueRef};
use crate::index::struct_filter_context::StructFilterContext;
use crate::payload_storage::FilterContext;
use crate::types::{IntPayloadType, UuidIntType};
pub enum FacetIndex<'a> {
Keyword(&'a MapIndex<str>),
Int(&'a MapIndex<IntPayloadType>),
Uuid(&'a MapIndex<UuidIntType>),
Bool(&'a BinaryIndex),
}
impl<'a> FacetIndex<'a> {
pub fn get_values(
&self,
point_id: PointOffsetType,
) -> Box<dyn Iterator<Item = FacetValueRef<'a>> + 'a> {
match self {
FacetIndex::Keyword(index) => {
let iter = index
.get_values(point_id)
.into_iter()
.flatten() // flatten the Option
.map(FacetValueRef::Keyword);
Box::new(iter)
}
FacetIndex::Int(index) => {
let iter = index
.get_values(point_id)
.into_iter()
.flatten() // flatten the Option
.map(FacetValueRef::Int);
Box::new(iter)
}
FacetIndex::Uuid(index) => {
let iter = index
.get_values(point_id)
.into_iter()
.flatten() // flatten the Option
.map(FacetValueRef::Uuid);
Box::new(iter)
}
FacetIndex::Bool(index) => {
let iter = vec![
index.values_has_true(point_id).then_some(true),
index.values_has_false(point_id).then_some(false),
]
.into_iter()
.flatten()
.map(FacetValueRef::Bool);
Box::new(iter)
}
}
}
pub fn iter_values(&self) -> Box<dyn Iterator<Item = FacetValueRef<'a>> + 'a> {
match self {
FacetIndex::Keyword(index) => {
let iter = index.iter_values().map(FacetValueRef::Keyword);
Box::new(iter)
}
FacetIndex::Int(index) => {
let iter = index.iter_values().map(FacetValueRef::Int);
Box::new(iter)
}
FacetIndex::Uuid(index) => {
let iter = index.iter_values().map(FacetValueRef::Uuid);
Box::new(iter)
}
FacetIndex::Bool(_index) => {
let iter = vec![true, false].into_iter().map(FacetValueRef::Bool);
Box::new(iter)
}
}
}
pub fn iter_filtered_counts_per_value(
&self,
context: &'a StructFilterContext,
) -> impl Iterator<Item = FacetHit<FacetValueRef<'a>>> + 'a {
let iter: Box<dyn Iterator<Item = _>> = match self {
FacetIndex::Keyword(index) => {
let iter = index
.iter_values_map()
.map(|(value, ids_iter)| (FacetValueRef::Keyword(value), ids_iter));
Box::new(iter)
}
FacetIndex::Int(index) => {
let iter = index
.iter_values_map()
.map(|(value, ids_iter)| (FacetValueRef::Int(value), ids_iter));
Box::new(iter)
}
FacetIndex::Uuid(index) => {
let iter = index
.iter_values_map()
.map(|(value, ids_iter)| (FacetValueRef::Uuid(value), ids_iter));
Box::new(iter)
}
FacetIndex::Bool(index) => {
let iter = index
.iter_values_map()
.map(|(value, ids_iter)| (FacetValueRef::Bool(value), ids_iter));
Box::new(iter)
}
};
iter.map(|(value, internal_ids_iter)| FacetHit {
value,
count: internal_ids_iter
.unique()
.filter(|&point_id| context.check(point_id))
.count(),
})
}
pub fn iter_counts_per_value(
&'a self,
) -> impl Iterator<Item = FacetHit<FacetValueRef<'a>>> + 'a {
let iter: Box<dyn Iterator<Item = _>> = match self {
FacetIndex::Keyword(index) => {
let iter = index
.iter_counts_per_value()
.map(|(value, count)| (FacetValueRef::Keyword(value), count));
Box::new(iter)
}
FacetIndex::Int(index) => {
let iter = index
.iter_counts_per_value()
.map(|(value, count)| (FacetValueRef::Int(value), count));
Box::new(iter)
}
FacetIndex::Uuid(index) => {
let iter = index
.iter_counts_per_value()
.map(|(value, count)| (FacetValueRef::Uuid(value), count));
Box::new(iter)
}
FacetIndex::Bool(index) => {
let iter = index
.iter_counts_per_value()
.map(|(value, count)| (FacetValueRef::Bool(value), count));
Box::new(iter)
}
};
iter.map(|(value, count)| FacetHit { value, count })
}
}
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