elastic-query-builder 0.1.39

use crate::aggregation::stats_aggregation::StatsAggregation;
use crate::aggregation::terms_aggregation::TermsAggregation;
use crate::aggregation::AggregationTrait;
use crate::{merge, QueryTrait};
use serde::ser::SerializeStruct;
use serde::{Serialize, Serializer};
use serde_json::{json, Value};

#[derive(Default)]
pub struct FilterAggregation {
    name: String,
    filter: Value,
    aggregation: Value,
}

impl FilterAggregation {
    pub fn new(name: &str) -> Self {
        FilterAggregation {
            name: name.to_string(),
            ..Default::default()
        }
    }

    pub fn set_filter<T>(mut self, value: T) -> Self
    where
        T: QueryTrait,
    {
        self.filter = value.build();
        self
    }
    pub fn append_aggregation<T>(mut self, query: T) -> Self
    where
        T: AggregationTrait,
    {
        let mut values = self.aggregation.clone();
        merge(&mut values, &query.build());
        self.aggregation = json!(values);
        return self;
    }
}

impl Serialize for FilterAggregation {
    fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
    where
        S: Serializer,
    {
        let mut state = serializer.serialize_struct("FilterAggregation", 0)?;
        if !(self.filter.is_null() || self.filter.to_string().is_empty()) {
            state.serialize_field("filter", &self.filter)?;
        }
        if !(self.aggregation.is_null() || self.aggregation.to_string().is_empty()) {
            state.serialize_field("aggs", &self.aggregation)?;
        }
        state.end()
    }
}

impl AggregationTrait for FilterAggregation {
    fn name(&self) -> &str {
        self.name.as_str()
    }

    fn build(&self) -> Value {
        let name = self.name.to_string();
        json!({ name: self })
    }

    fn query_name(&self) -> String {
        "filter".to_string()
    }
}

#[test]
fn test() {
    let build = FilterAggregation::new("title")
        .append_aggregation(TermsAggregation::new("A").set_field("A_1"))
        .append_aggregation(TermsAggregation::new("B").set_field("B_1"));
    assert_eq!("{\"title\":{\"aggs\":{\"A\":{\"terms\":{\"field\":\"A_1\",\"size\":10}},\"B\":{\"terms\":{\"field\":\"B_1\",\"size\":10}}}}}", build.build().to_string());
}