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use super::{
sink_names_input, source_names_output_changed, BinBuildEnvironment,
BinDescription, Calculator, FetchItem, GetCalibration, Item,
Iteration, Result, Scope, SinkBin, SinkNames, SourceBin, SourceId,
SourceNames, SourceSinkBinDescription, WriteDotSimple, SINK_INPUT,
SOURCE_CHANGED, SOURCE_OUTPUT,
};
use crate::error;
use indexmap::IndexSet;
static BIN_TYPE: &str = "maximum";
#[derive(Debug)]
pub struct Bin {
scope: Scope,
source_input: Box<dyn FetchItem>,
changed: bool,
result_output: Item,
}
impl SinkBin for Bin {}
impl SourceBin for Bin {
fn get_source_data(&self, source: &SourceId) -> Result<Item> {
if source.id == SOURCE_OUTPUT {
Ok(self.result_output.clone())
} else if source.id == SOURCE_CHANGED {
Ok(Item::from(self.changed))
} else {
error::MissingSourceName {
scope: self.scope.clone(),
name: source.id.to_string(),
bin_type: BIN_TYPE.to_string(),
}
.fail()
}
}
}
impl Calculator for Bin {
fn calculate(&mut self, _iteration: &Iteration) -> Result<()> {
let input = self.source_input.fetch_item(&self.scope)?;
match (self.result_output.to_float(), input.to_float()) {
(Ok(m), Ok(v)) if v > m => {
self.changed = self.result_output != input;
self.result_output = input;
}
(Err(_), Ok(_v)) => {
self.changed = self.result_output != input;
self.result_output = input;
}
_ => {
self.changed = false;
}
}
Ok(())
}
}
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct Description;
impl BinDescription for Description {
type Bin = Bin;
fn check_validity(
&self,
_scope: &Scope,
_get_calibration: &mut dyn GetCalibration,
) -> Result<()> {
Ok(())
}
fn bin_type(&self) -> &'static str {
BIN_TYPE
}
}
impl SinkNames for Description {
fn sink_names(&self) -> IndexSet<String> {
sink_names_input()
}
}
impl SourceNames for Description {
fn source_names(&self) -> Result<IndexSet<String>> {
Ok(source_names_output_changed())
}
}
impl SourceSinkBinDescription for Description {
fn build_bin(
&self,
scope: &Scope,
env: &mut dyn BinBuildEnvironment,
) -> Result<Self::Bin> {
Ok(Bin {
scope: scope.clone(),
source_input: env.resolve(SINK_INPUT)?,
changed: false,
result_output: Item::Nothing,
})
}
}
impl WriteDotSimple for Description {}